|
The binding affinity at the 5-hydroxytryptamine 1A receptor determined using [3H]5-CT
|
None
|
500.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
Binding affinity for human cloned 5-hydroxytryptamine 1A receptor
|
None
|
398.11
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity for human cloned 5-hydroxytryptamine 1A receptor
|
None
|
398.11
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 2.
Year : 2002
Volume : 12
Issue : 2
First Page : 249
Last Page : 253
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : Following the programme started at Janssen Research Foundation searching for 5-HT(2A/2C) antagonists, we now report on the synthesis of a series of substituted 2-(Dimethylaminomethyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives. The 5-HT(2A), 5-HT(2C) and H(1) receptor affinities as well as the mCPP antagonistic activity of the compounds synthesised is described.
|
Binding affinity for human cloned 5-hydroxytryptamine 1D receptor
|
None
|
380.19
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity for human cloned 5-hydroxytryptamine 1D receptor
|
None
|
380.19
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 2.
Year : 2002
Volume : 12
Issue : 2
First Page : 249
Last Page : 253
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : Following the programme started at Janssen Research Foundation searching for 5-HT(2A/2C) antagonists, we now report on the synthesis of a series of substituted 2-(Dimethylaminomethyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives. The 5-HT(2A), 5-HT(2C) and H(1) receptor affinities as well as the mCPP antagonistic activity of the compounds synthesised is described.
|
Binding affinity of compound towards 5-hydroxytryptamine 1C receptor using [3H]mesulergine (1.2 nM) ligand in choroid Plexus pig was determined
|
Sus scrofa
|
3.8
nM
|
|
Journal : J. Med. Chem.
Title : New benzocycloalkylpiperazines, potent and selective 5-HT1A receptor ligands.
Year : 1997
Volume : 40
Issue : 6
First Page : 952
Last Page : 960
Authors : el Ahmad Y, Laurent E, Maillet P, Talab A, Teste JF, Dokhan R, Tran G, Ollivier R.
Abstract : A series of 1-(benzocycloalkyl)-4-(benzamidolkyl)piperazine derivatives was prepared in order to obtain compounds with a high affinity and selectivity for 5-HT1A receptors. The modifications of aromatic substituents, the length of the alkyl chain, and the size of the ring were explored. Most of N-(1,2,3,4-tetrahydronaphthyl)-N'-(benzamidoethyl)piperazines (32-37) were bound to 5-HT1A receptors in a nanomolar range and presented a high degree of selectivity. After resolution, levorotatory enantiomers showed affinity and selectivity higher than those of dextrorotory ones for 5-HT1A sites. The agonist type activity of selected derivatives was also confirmed in vitro on the inhibition of the activation of adenylate cyclase induced by forskolin and, in vivo, on the induction of the lower lip retraction in rats.
|
Evaluated for the binding affinity to porcine choroid plexus at 5-hydroxytryptamine 2C receptor binding site by using [3H]-MES as a radioligand.
|
Sus scrofa
|
10.0
nM
|
|
Journal : J. Med. Chem.
Title : Central serotonin receptors as targets for drug research.
Year : 1987
Volume : 30
Issue : 1
First Page : 1
Last Page : 12
Authors : Glennon RA.
|
Binding affinity towards 5-hydroxytryptamine 2 receptor at 1.0 uM concentration
|
None
|
1.1
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
Binding affinity against 5-hydroxytryptamine 2 receptor in rat striatum using [3H]-RP62203
|
Rattus norvegicus
|
5.1
nM
|
|
Journal : J. Med. Chem.
Title : 7-Methyl-6,7,8,9,14,15-hexahydro-5H-benz[d]indolo[2,3-g]azecine: a new heterocyclic system and a new lead compound for dopamine receptor antagonists.
Year : 2000
Volume : 43
Issue : 10
First Page : 2079
Last Page : 2081
Authors : Witt T, Hock FJ, Lehmann J.
Abstract : Partially hydrogenated derivatives of the new heterocyclic ring systems benz[d]indolo[2,3-g]azecine and bisindolo[3,2-d][2, 3-g]azecine were synthesized starting from lactones and amines via the described synthetic methods. In binding assays with rat striatal receptors, 7-methyl-6,7,8,9,14,15-hexahydro-5H-benz[d]indolo[2, 3-g]azecine (LE 300) proved to be of high affinity for the D(1) binding site (K(i) = 0.08 nmol for displacement of [(3)H]SCH23390), being superior in this assay to standards such as butaclamol and SCH23390. This compound was characterized as a dopamine antagonist by conditioned avoidance response test with mice. Thus, LE 300 represents the lead of a new class of dopamine antagonists for future investigations.
|
Binding affinity to rat cortical membranes at 5-hydroxytryptamine 2 (5-HT2) receptor using [3H]KET as a radioligand
|
None
|
1.4
nM
|
|
Journal : J. Med. Chem.
Title : Central serotonin receptors as targets for drug research.
Year : 1987
Volume : 30
Issue : 1
First Page : 1
Last Page : 12
Authors : Glennon RA.
|
Binding affinity to 5-hydroxytryptamine 2 receptor in rat frontal cortical membranes by [3H]- KET displacement.
|
None
|
10.0
nM
|
|
Journal : J. Med. Chem.
Title : Central serotonin receptors as targets for drug research.
Year : 1987
Volume : 30
Issue : 1
First Page : 1
Last Page : 12
Authors : Glennon RA.
|
Binding affinity for human cloned 5-hydroxytryptamine 2A receptor expressed in L929 cells using [125I]R91150 as radioligand
|
None
|
10.47
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Displacement of [3H]ketanserin (0.5 nM) from rat cerebral cortex 5-hydroxytryptamine 2A receptors
|
None
|
2.5
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and structure-affinity relationship investigations of 5-heteroaryl-substituted analogues of the antipsychotic sertindole. A new class of highly selective alpha(1) adrenoceptor antagonists.
Year : 2003
Volume : 46
Issue : 2
First Page : 265
Last Page : 283
Authors : Balle T, Perregaard J, Ramirez MT, Larsen AK, Søby KK, Liljefors T, Andersen K.
Abstract : A new class of 5-heteroaryl-substituted 1-(4-fluorophenyl)-3-(4-piperidinyl)-1H-indoles as highly selective and potentially CNS-active alpha 1-adrenoceptor antagonists is described. The compounds are derived from the antipsychotic sertindole. The structure-affinity relationships of the 5-heteroaryl substituents, and the substituents on the piperidine nitrogen atom were optimized with respect to affinity for alpha 1 adrenoceptors and selectivity in respect to dopamine (D(1-4)) and serotonin (5-HT(1A-1B) and 5-HT(2A,2C)) receptors. The most selective compound obtained, 3-[4-[1-(4-fluorophenyl)-5-(1-methyl-1,2,4-triazol-3-yl)-1H-indol-3-yl]-1-piperidinyl]propionitrile (15c), has affinities of 0.99, 3.2, and 9.0 nM for the alpha(1a), alpha(1b), and alpha(1d) adrenoceptor subtypes, respectively, and a selectivity for adrenergic alpha(1a) receptors in respect to dopamine D2, D3, and D4 and serotonin 5-HT(2A) and 5-HT(2C) higher than 900, comparable to the selectivity of prazosin. In addition, the compound is more than 150-fold selective in respect to serotonin 5-HT(1A) and 5-HT(1B) receptors. A new basic pharmacophore for alpha 1-adrenoceptor antagonists based on a previously reported pharmacophore model for dopamine D2 antagonist is suggested.
|
The binding affinity at 5-hydroxytryptamine 2A receptor was determined using [3H]ketanserin
|
None
|
1.5
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
Binding affinity for human cloned 5-hydroxytryptamine 2C receptor expressed in CHO cells using [3H]mesulergine as radioligand
|
None
|
7.413
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
The binding affinity at 5-hydroxytryptamine 2C receptor was determined using [3H]mesulergine
|
None
|
1.4
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
The binding affinity at 5-hydroxytryptamine 3 receptor was determined using [3H]LY-278584
|
None
|
70.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
The binding affinity was measured for 5-hydroxytryptamine 3 receptor on NG 108-15 cell line of mouse neuroblastoma-glioma cells in presence of [3H]5 radioligand (in vitro)
|
None
|
252.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis, in vitro binding profile, and central nervous system penetrability of the highly potent 5-HT3 receptor antagonist [3H]-4-(2-methoxyphenyl)-2-[4(5)-methyl-5(4)-imidazolylmethyl]thiazole.
Year : 1990
Volume : 33
Issue : 11
First Page : 3020
Last Page : 3023
Authors : Rosen T, Seeger TF, McLean S, Nagel AA, Ives JL, Guarino KJ, Bryce D, Furman J, Roth RW, Chalabi PM.
Abstract : 4-(2-Methoxyphenyl)-2-[4(5)-methyl-5(4)-imidazolylmethyl]thiazole (5) is a highly potent member of a structurally novel series of selective serotonin-3 receptor antagonists. The synthesis of tritiated 5 and its binding profile in neuroblastoma-glioma 108-15 cells are described. Furthermore, in vivo studies in rat with this radioligand indicate that it effectively penetrates the blood-brain barrier upon peripheral administration. Thus, 5 should be a useful pharmacological tool for both in vitro and in vivo studies of this class of compounds.
|
Binding affinity towards human 5-hydroxytryptamine 6 receptor was evaluated using [3H]-LSD as radioligand
|
Homo sapiens
|
55.0
nM
|
|
Journal : J. Med. Chem.
Title : Higher-end serotonin receptors: 5-HT(5), 5-HT(6), and 5-HT(7).
Year : 2003
Volume : 46
Issue : 14
First Page : 2795
Last Page : 2812
Authors : Glennon RA.
|
Binding affinity for human cloned 5-hydroxytryptamine 7 receptor
|
None
|
114.82
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity towards rat 5-hydroxytryptamine 7 receptor
|
None
|
100.0
nM
|
|
Journal : J. Med. Chem.
Title : Higher-end serotonin receptors: 5-HT(5), 5-HT(6), and 5-HT(7).
Year : 2003
Volume : 46
Issue : 14
First Page : 2795
Last Page : 2812
Authors : Glennon RA.
|
Binding affinity towards 5-hydroxytryptamine 7 receptor
|
None
|
63.1
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : First pharmacophoric hypothesis for 5-HT7 antagonism.
Year : 2000
Volume : 10
Issue : 10
First Page : 1097
Last Page : 1100
Authors : López-Rodríguez ML, Porras E, Benhamú B, Ramos JA, Morcillo MJ, Lavandera JL.
Abstract : In order to make the first contribution to the elucidation of essential structural features for 5-HT7 antagonism, a set of thirty 5-HT7 antagonists were selected from the literature. A pharmacophore model was built using Molecular Modeling studies with Catalyst program. The information contained in this model was validated with new synthesized compounds.
|
Non-selective inhibitory activity was determined against 5-hydroxytryptamine 7 receptor
|
None
|
63.1
nM
|
|
Journal : J. Med. Chem.
Title : Optimization of the pharmacophore model for 5-HT7R antagonism. Design and synthesis of new naphtholactam and naphthosultam derivatives.
Year : 2003
Volume : 46
Issue : 26
First Page : 5638
Last Page : 5650
Authors : López-Rodríguez ML, Porras E, Morcillo MJ, Benhamú B, Soto LJ, Lavandera JL, Ramos JA, Olivella M, Campillo M, Pardo L.
Abstract : We present in this study an optimization of a preliminary pharmacophore model for 5-HT(7)R antagonism, with the incorporation of recently reported ligands and using an efficient procedure with the CATALYST program. The model consists of five features: a positive ionizable atom (PI), a H-bonding acceptor group (HBA), and three hydrophobic regions (HYD). This model has been supported by the design, synthesis, and biological evaluation of new naphtholactam and naphthosultam derivatives of general structure I (39-72). A systematic structure-affinity relationship (SAFIR) study on these analogues has allowed us to confirm that the model incorporates the essential structural features for 5-HT(7)R antagonism. In addition, computational simulation of the complex between compound 56 and a rhodopsin-based 3D model of the 5-HT(7)R transmembrane domain has permitted us to define the molecular details of the ligand-receptor interaction and gives additional support to the proposed pharmacophore model for 5-HT(7)R antagonism: (i) the HBA feature of the pharmacophore model binds Ser(5.42) and Thr(5.43), (ii) the HYD1 feature interacts with Phe(6.52), (iii) the PI feature forms an ionic interaction with Asp(3.32), and (iv) the HYD3 (AR) feature interacts with a set of aromatic residues (Phe(3.28), Tyr(7.43)). These results provide the tools for the design and synthesis of new ligands with predetermined affinities and pharmacological properties.
|
Compound was evaluated for in vitro inhibition of histamine activated adenylate cyclase in guinea pig cerebral cortex
|
Cavia porcellus
|
190.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and anxiolytic activity of a series of pyrazino[1,2-a][1,4]benzodiazepine derivatives.
Year : 1980
Volume : 23
Issue : 8
First Page : 952
Last Page : 955
Authors : Smith RG, Lucas RA, Wasley JW.
Abstract : The synthesis and biological evaluation of some derivatives of pyrazino[1,2-a][1,4]benzodiazepines for anxiolytic and antidepressant activity are presented. Significant levels of anxiolytic activity were noted for 7-(o-chlorophenyl)-9-chloro-1,2,3,4,4a,5-hexahydro-3-methylpyrazino[1,2-a];E11,4]benzodiazepine (4b).
|
Compound was tested for its binding affinity towards brain (Hippocampus) Adenylate cyclase
|
Cavia porcellus
|
65.0
nM
|
|
Journal : J. Med. Chem.
Title : Development of predictive retention-activity relationship models of tricyclic antidepressants by micellar liquid chromatography.
Year : 1999
Volume : 42
Issue : 16
First Page : 3154
Last Page : 3162
Authors : Quiñones-Torrelo C, Sagrado S, Villanueva-Camañas RM, Medina-Hernández MJ.
Abstract : The distribution of tricyclic antidepressants from plasma to brain, where these drugs exert their main clinical action, and other organs is related to transport events across the cell membranes of the different tissues. It could be expected that all the molecular features that condition the transport processes (mainly hydrophobicity and molar total charge) also control the pharmacokinetic and biochemical behavior. Micellar liquid chromatography (MLC) has been proposed to emulate in vitro the partitioning process in the biomembranes. The use of micellar solutions of Brij35 as mobile phases in reversed-phase liquid chromatography has proven to be valid to predict the biological activities of local anesthetics, barbiturates, catecholamines, and benzodiazepines. In this paper, the relationships between the capacity factor in MLC and some pharmacokinetic parameters and biological responses of tricyclic antidepressants are studied. Predictive regression models for the estimation of these parameter values, using the logarithm of the retention data (log k) as independent variable, are also proposed.
|
Compound was tested for its binding affinity towards brain (neocortex) Adenylate cyclase
|
Cavia porcellus
|
71.0
nM
|
|
Journal : J. Med. Chem.
Title : Development of predictive retention-activity relationship models of tricyclic antidepressants by micellar liquid chromatography.
Year : 1999
Volume : 42
Issue : 16
First Page : 3154
Last Page : 3162
Authors : Quiñones-Torrelo C, Sagrado S, Villanueva-Camañas RM, Medina-Hernández MJ.
Abstract : The distribution of tricyclic antidepressants from plasma to brain, where these drugs exert their main clinical action, and other organs is related to transport events across the cell membranes of the different tissues. It could be expected that all the molecular features that condition the transport processes (mainly hydrophobicity and molar total charge) also control the pharmacokinetic and biochemical behavior. Micellar liquid chromatography (MLC) has been proposed to emulate in vitro the partitioning process in the biomembranes. The use of micellar solutions of Brij35 as mobile phases in reversed-phase liquid chromatography has proven to be valid to predict the biological activities of local anesthetics, barbiturates, catecholamines, and benzodiazepines. In this paper, the relationships between the capacity factor in MLC and some pharmacokinetic parameters and biological responses of tricyclic antidepressants are studied. Predictive regression models for the estimation of these parameter values, using the logarithm of the retention data (log k) as independent variable, are also proposed.
|
Antagonistic activity against clonidine-stimulated rat vas deferens presynaptic alpha-2 adrenergic receptor
|
Rattus norvegicus
|
53.7
nM
|
|
Journal : J. Med. Chem.
Title : Adrenoceptor and tetrabenazine antagonism activities of some pyridinyltetrahydropyridines.
Year : 1984
Volume : 27
Issue : 9
First Page : 1182
Last Page : 1185
Authors : Saari WS, Halczenko W, Huff JR, Guare JP, Hunt CA, Randall WC, Lotti VJ, Yarbrough GG.
Abstract : A series of pyridinyltetrahydropyridine derivatives was synthesized and evaluated as adrenoceptor and tetrabenazine antagonists. 4-(3-Fluoro-2-pyridinyl)-1,2,5,6-tetrahydropyridine proved to be the most potent and selective alpha 2-adrenoceptor antagonist of the series as measured in vitro by displacement of [3H]clonidine and [3H]prazosin from membrane binding sites of calf cerebral cortex and by antagonism of the effects of clonidine and methoxamine in the rat isolated, field-stimulated vas deferens. In addition, this compound, and the corresponding desfluoro derivative, blocked tetrabenazine-induced ptosis in the mouse.
|
The binding affinity at Alpha-1 adrenergic receptor determined using [3H]prazosin
|
None
|
28.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
Presynaptic antagonistic activity against alpha-2 adrenergic receptor from rat, isolated, field-stimulated vas deferens, using clonidine as the agonist
|
None
|
53.7
nM
|
|
Journal : J. Med. Chem.
Title : Pyridinylpiperazines, a new class of selective alpha 2-adrenoceptor antagonists.
Year : 1983
Volume : 26
Issue : 12
First Page : 1696
Last Page : 1701
Authors : Saari WS, Halczenko W, King SW, Huff JR, Guare JP, Hunt CA, Randall WC, Anderson PS, Lotti VJ, Taylor DA.
Abstract : A series of 1-(2-pyridinyl)piperazine derivatives was synthesized and evaluated for adrenergic activity. In vitro activity was assessed through the antagonism of clonidine's effect in the rat, isolated, field-stimulated vas deferens and by the displacement of [3H]clonidine from membrane binding sites of calf cerebral cortex. Antagonism of clonidine-induced mydriasis in the rat was used as an in vivo assay. Several members of the series proved to be potent, selective alpha 2-adrenoceptor antagonists. 1-(3-Fluoro-2-pyridinyl)piperazine was more potent than either yohimbine or rauwolscine in displacement of [3H]clonidine and had a higher affinity for this binding site (alpha 2) than for the [3H]prazosin site (alpha 1). In vivo, the 3-F derivative was more potent than the reference standards in reversing clonidine-induced mydriasis. None of the members of this series was more selective or potent than rauwolscine in antagonizing clonidine in the rat vas deferens.
|
Antagonistic activity upon postsynaptic alpha-1 adrenergic receptor was determined in the rat isolated, field stimulated vas deferens using methoxamine
|
None
|
57.54
nM
|
|
Journal : J. Med. Chem.
Title : Adrenoceptor and tetrabenazine antagonism activities of some pyridinyltetrahydropyridines.
Year : 1984
Volume : 27
Issue : 9
First Page : 1182
Last Page : 1185
Authors : Saari WS, Halczenko W, Huff JR, Guare JP, Hunt CA, Randall WC, Lotti VJ, Yarbrough GG.
Abstract : A series of pyridinyltetrahydropyridine derivatives was synthesized and evaluated as adrenoceptor and tetrabenazine antagonists. 4-(3-Fluoro-2-pyridinyl)-1,2,5,6-tetrahydropyridine proved to be the most potent and selective alpha 2-adrenoceptor antagonist of the series as measured in vitro by displacement of [3H]clonidine and [3H]prazosin from membrane binding sites of calf cerebral cortex and by antagonism of the effects of clonidine and methoxamine in the rat isolated, field-stimulated vas deferens. In addition, this compound, and the corresponding desfluoro derivative, blocked tetrabenazine-induced ptosis in the mouse.
|
Presynaptic antagonistic activity against alpha-1 adrenergic receptor from rat, isolated, field-stimulated vas deferens, using methoxamine as the agonist
|
None
|
57.54
nM
|
|
Journal : J. Med. Chem.
Title : Pyridinylpiperazines, a new class of selective alpha 2-adrenoceptor antagonists.
Year : 1983
Volume : 26
Issue : 12
First Page : 1696
Last Page : 1701
Authors : Saari WS, Halczenko W, King SW, Huff JR, Guare JP, Hunt CA, Randall WC, Anderson PS, Lotti VJ, Taylor DA.
Abstract : A series of 1-(2-pyridinyl)piperazine derivatives was synthesized and evaluated for adrenergic activity. In vitro activity was assessed through the antagonism of clonidine's effect in the rat, isolated, field-stimulated vas deferens and by the displacement of [3H]clonidine from membrane binding sites of calf cerebral cortex. Antagonism of clonidine-induced mydriasis in the rat was used as an in vivo assay. Several members of the series proved to be potent, selective alpha 2-adrenoceptor antagonists. 1-(3-Fluoro-2-pyridinyl)piperazine was more potent than either yohimbine or rauwolscine in displacement of [3H]clonidine and had a higher affinity for this binding site (alpha 2) than for the [3H]prazosin site (alpha 1). In vivo, the 3-F derivative was more potent than the reference standards in reversing clonidine-induced mydriasis. None of the members of this series was more selective or potent than rauwolscine in antagonizing clonidine in the rat vas deferens.
|
Displacement of [3H]clonidine from alpha-2-adrenergic receptor of calf neocortical membrane
|
Bos taurus
|
19.0
nM
|
|
Journal : J. Med. Chem.
Title : Piperazinylimidazo[1,2-a]pyrazines with selective affinity for in vitro alpha-adrenergic receptor subtypes.
Year : 1983
Volume : 26
Issue : 3
First Page : 357
Last Page : 363
Authors : Lumma WC, Randall WC, Cresson EL, Huff JR, Hartman RD, Lyon TF.
Abstract : Regioselective syntheses of alkyl- and halogen-substituted piperazinylimidazo[1,2-a]pyrazines by novel oxidation-dehydration of [(beta-hydroxyalkyl)amino]pyrazines are described. Lanthanide shift reagent studies allowed correction of literature assignments of NMR chemical shifts and coupling constants for the imidazo[1,2-a]pyrazine ring system (e.g., J5,8 greater than J6,8). Equilibrium constants for displacement of specifically bound [3H]clonidine and [3H]prazosin from calf cerebral cortex homogenates in vitro are tabulated for reference and title compounds, and structure-affinity relationships for alpha 2- vs. alpha 1-adrenergic receptors are considered. Compound 2a, 8-(1-piperazinyl)imidazo[1,2-a]pyrazine, is equipotent with mianserin on the clonidine receptor (alpha 2) but ca. 70 times as selective as mianserin for this alpha 2-adrenergic receptor. Reduction of the imidazo ring (2,3-dihydro) lowers affinity for the alpha 2 receptor without affecting alpha 1-receptor affinity. Computer-assisted molecular modeling techniques are applied to the estimation of conformational energies of 2a and its 5-position isomer in relation to the semirigid molecule mianserin.
|
Binding activity against alpha-2 adrenergic receptor from calf cerebral cortex, using [3H]clonidine as the radioligand
|
None
|
17.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyridinylpiperazines, a new class of selective alpha 2-adrenoceptor antagonists.
Year : 1983
Volume : 26
Issue : 12
First Page : 1696
Last Page : 1701
Authors : Saari WS, Halczenko W, King SW, Huff JR, Guare JP, Hunt CA, Randall WC, Anderson PS, Lotti VJ, Taylor DA.
Abstract : A series of 1-(2-pyridinyl)piperazine derivatives was synthesized and evaluated for adrenergic activity. In vitro activity was assessed through the antagonism of clonidine's effect in the rat, isolated, field-stimulated vas deferens and by the displacement of [3H]clonidine from membrane binding sites of calf cerebral cortex. Antagonism of clonidine-induced mydriasis in the rat was used as an in vivo assay. Several members of the series proved to be potent, selective alpha 2-adrenoceptor antagonists. 1-(3-Fluoro-2-pyridinyl)piperazine was more potent than either yohimbine or rauwolscine in displacement of [3H]clonidine and had a higher affinity for this binding site (alpha 2) than for the [3H]prazosin site (alpha 1). In vivo, the 3-F derivative was more potent than the reference standards in reversing clonidine-induced mydriasis. None of the members of this series was more selective or potent than rauwolscine in antagonizing clonidine in the rat vas deferens.
|
Displacement of [3H]clonidine from calf cerebral cortex alpha-2 adrenergic receptor
|
Bos taurus
|
17.0
nM
|
|
Journal : J. Med. Chem.
Title : Adrenoceptor and tetrabenazine antagonism activities of some pyridinyltetrahydropyridines.
Year : 1984
Volume : 27
Issue : 9
First Page : 1182
Last Page : 1185
Authors : Saari WS, Halczenko W, Huff JR, Guare JP, Hunt CA, Randall WC, Lotti VJ, Yarbrough GG.
Abstract : A series of pyridinyltetrahydropyridine derivatives was synthesized and evaluated as adrenoceptor and tetrabenazine antagonists. 4-(3-Fluoro-2-pyridinyl)-1,2,5,6-tetrahydropyridine proved to be the most potent and selective alpha 2-adrenoceptor antagonist of the series as measured in vitro by displacement of [3H]clonidine and [3H]prazosin from membrane binding sites of calf cerebral cortex and by antagonism of the effects of clonidine and methoxamine in the rat isolated, field-stimulated vas deferens. In addition, this compound, and the corresponding desfluoro derivative, blocked tetrabenazine-induced ptosis in the mouse.
|
Displacement of [3H]prazosin from alpha-1-adrenergic receptor of calf neocortical membrane
|
Bos taurus
|
43.0
nM
|
|
Journal : J. Med. Chem.
Title : Piperazinylimidazo[1,2-a]pyrazines with selective affinity for in vitro alpha-adrenergic receptor subtypes.
Year : 1983
Volume : 26
Issue : 3
First Page : 357
Last Page : 363
Authors : Lumma WC, Randall WC, Cresson EL, Huff JR, Hartman RD, Lyon TF.
Abstract : Regioselective syntheses of alkyl- and halogen-substituted piperazinylimidazo[1,2-a]pyrazines by novel oxidation-dehydration of [(beta-hydroxyalkyl)amino]pyrazines are described. Lanthanide shift reagent studies allowed correction of literature assignments of NMR chemical shifts and coupling constants for the imidazo[1,2-a]pyrazine ring system (e.g., J5,8 greater than J6,8). Equilibrium constants for displacement of specifically bound [3H]clonidine and [3H]prazosin from calf cerebral cortex homogenates in vitro are tabulated for reference and title compounds, and structure-affinity relationships for alpha 2- vs. alpha 1-adrenergic receptors are considered. Compound 2a, 8-(1-piperazinyl)imidazo[1,2-a]pyrazine, is equipotent with mianserin on the clonidine receptor (alpha 2) but ca. 70 times as selective as mianserin for this alpha 2-adrenergic receptor. Reduction of the imidazo ring (2,3-dihydro) lowers affinity for the alpha 2 receptor without affecting alpha 1-receptor affinity. Computer-assisted molecular modeling techniques are applied to the estimation of conformational energies of 2a and its 5-position isomer in relation to the semirigid molecule mianserin.
|
Binding activity against alpha-1 adrenergic receptor from calf cerebral cortex, using [3H]-prazosin as the radioligand
|
None
|
43.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyridinylpiperazines, a new class of selective alpha 2-adrenoceptor antagonists.
Year : 1983
Volume : 26
Issue : 12
First Page : 1696
Last Page : 1701
Authors : Saari WS, Halczenko W, King SW, Huff JR, Guare JP, Hunt CA, Randall WC, Anderson PS, Lotti VJ, Taylor DA.
Abstract : A series of 1-(2-pyridinyl)piperazine derivatives was synthesized and evaluated for adrenergic activity. In vitro activity was assessed through the antagonism of clonidine's effect in the rat, isolated, field-stimulated vas deferens and by the displacement of [3H]clonidine from membrane binding sites of calf cerebral cortex. Antagonism of clonidine-induced mydriasis in the rat was used as an in vivo assay. Several members of the series proved to be potent, selective alpha 2-adrenoceptor antagonists. 1-(3-Fluoro-2-pyridinyl)piperazine was more potent than either yohimbine or rauwolscine in displacement of [3H]clonidine and had a higher affinity for this binding site (alpha 2) than for the [3H]prazosin site (alpha 1). In vivo, the 3-F derivative was more potent than the reference standards in reversing clonidine-induced mydriasis. None of the members of this series was more selective or potent than rauwolscine in antagonizing clonidine in the rat vas deferens.
|
Displacement of [3H]prazosin from calf cerebral cortex alpha-1 adrenergic receptor
|
Bos taurus
|
43.0
nM
|
|
Journal : J. Med. Chem.
Title : Adrenoceptor and tetrabenazine antagonism activities of some pyridinyltetrahydropyridines.
Year : 1984
Volume : 27
Issue : 9
First Page : 1182
Last Page : 1185
Authors : Saari WS, Halczenko W, Huff JR, Guare JP, Hunt CA, Randall WC, Lotti VJ, Yarbrough GG.
Abstract : A series of pyridinyltetrahydropyridine derivatives was synthesized and evaluated as adrenoceptor and tetrabenazine antagonists. 4-(3-Fluoro-2-pyridinyl)-1,2,5,6-tetrahydropyridine proved to be the most potent and selective alpha 2-adrenoceptor antagonist of the series as measured in vitro by displacement of [3H]clonidine and [3H]prazosin from membrane binding sites of calf cerebral cortex and by antagonism of the effects of clonidine and methoxamine in the rat isolated, field-stimulated vas deferens. In addition, this compound, and the corresponding desfluoro derivative, blocked tetrabenazine-induced ptosis in the mouse.
|
Compound was tested for its inhibitory activity against Alpha-1 adrenergic receptor
|
None
|
0.07
nM
|
|
Journal : J. Med. Chem.
Title : Development of predictive retention-activity relationship models of tricyclic antidepressants by micellar liquid chromatography.
Year : 1999
Volume : 42
Issue : 16
First Page : 3154
Last Page : 3162
Authors : Quiñones-Torrelo C, Sagrado S, Villanueva-Camañas RM, Medina-Hernández MJ.
Abstract : The distribution of tricyclic antidepressants from plasma to brain, where these drugs exert their main clinical action, and other organs is related to transport events across the cell membranes of the different tissues. It could be expected that all the molecular features that condition the transport processes (mainly hydrophobicity and molar total charge) also control the pharmacokinetic and biochemical behavior. Micellar liquid chromatography (MLC) has been proposed to emulate in vitro the partitioning process in the biomembranes. The use of micellar solutions of Brij35 as mobile phases in reversed-phase liquid chromatography has proven to be valid to predict the biological activities of local anesthetics, barbiturates, catecholamines, and benzodiazepines. In this paper, the relationships between the capacity factor in MLC and some pharmacokinetic parameters and biological responses of tricyclic antidepressants are studied. Predictive regression models for the estimation of these parameter values, using the logarithm of the retention data (log k) as independent variable, are also proposed.
|
Binding affinity for human cloned Alpha-2A adrenergic receptor
|
None
|
20.89
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity for human cloned Alpha-2A adrenergic receptor
|
None
|
20.89
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 2.
Year : 2002
Volume : 12
Issue : 2
First Page : 249
Last Page : 253
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : Following the programme started at Janssen Research Foundation searching for 5-HT(2A/2C) antagonists, we now report on the synthesis of a series of substituted 2-(Dimethylaminomethyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives. The 5-HT(2A), 5-HT(2C) and H(1) receptor affinities as well as the mCPP antagonistic activity of the compounds synthesised is described.
|
Inhibition of specific [3H]prazosin binding (0.2 nM) to rat brain membranes alpha-1 adrenergic receptor
|
Oryctolagus cuniculus
|
251.19
nM
|
|
Journal : J. Med. Chem.
Title : Quantitative relationships between alpha-adrenergic activity and binding affinity of alpha-adrenoceptor agonists and antagonists.
Year : 1984
Volume : 27
Issue : 4
First Page : 495
Last Page : 503
Authors : Timmermans PB, de Jonge A, Thoolen MJ, Wilffert B, Batink H, van Zwieten PA.
Abstract : Quantitative relationships between in vitro affinity for alpha 1- and alpha 2-adrenoceptors (specific binding sites in rat brain membranes of [3H]prazosin and [3H]clonidine, respectively) and in vitro and in vivo alpha 1/alpha 2-adrenoceptor agonist/antagonist activities were derived for a series of 11 alpha-adrenergic antagonists and 35 agonists of dissimilar chemical structure. For the antagonists, the alpha 1/alpha 2-binding selectivity ratio most significantly correlated with the functional alpha 1/alpha 2-blocking selectivity ratios assessed in vitro (rabbit isolated pulmonary artery: antagonism of alpha 1-adrenoceptor-induced vasoconstriction and alpha 2-adrenoceptor-evoked facilitation of transmitter release) and in vivo (antagonism of alpha 1- and alpha 2-adrenoceptor-mediated vasoconstriction in pithed normotensive rats). These results show that the in vitro alpha 1- and alpha 2-adrenoceptor binding affinities of the antagonists provide adequate information concerning their functional alpha 1- and alpha 2-adrenoceptor blocking potencies against agonists. For the agonists, the central, alpha 2-adrenoceptor-elicited, hypotensive activity was not correlated with alpha 1-adrenoceptor binding affinity but was most significantly described in terms of affinity for alpha 2-adrenoceptors and a parabolic dependence on log P' (octanol/buffer; pH 7.4; 37 degrees C). The relevance of log P' in the regression is explained by the difference in accessibility to the membrane-bound alpha 2-adrenoceptors in the radioligand displacement experiments and the central medullary (hypotensive) alpha 2-adrenoceptors in the intact animal. In contrast, the affinity parameters for alpha 1- and alpha 2-adrenoceptors were found to be poor descriptors of the hypertensive potency of the agonists in which alpha 1- and alpha 2-adrenoceptors are known to play a role. The correlations in which the individual binding parameters and the combination of both variables were included reached only a moderate significance level.(ABSTRACT TRUNCATED AT 250 WORDS)
|
Binding affinity for human cloned Alpha-2C adrenergic receptor
|
None
|
42.66
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity for human cloned Alpha-2C adrenergic receptor
|
None
|
42.66
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 2.
Year : 2002
Volume : 12
Issue : 2
First Page : 249
Last Page : 253
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : Following the programme started at Janssen Research Foundation searching for 5-HT(2A/2C) antagonists, we now report on the synthesis of a series of substituted 2-(Dimethylaminomethyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives. The 5-HT(2A), 5-HT(2C) and H(1) receptor affinities as well as the mCPP antagonistic activity of the compounds synthesised is described.
|
Binding affinity for human cloned Alpha-1A adrenergic receptor
|
None
|
407.38
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Binding affinity for human cloned Alpha-1A adrenergic receptor
|
None
|
407.38
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 2.
Year : 2002
Volume : 12
Issue : 2
First Page : 249
Last Page : 253
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : Following the programme started at Janssen Research Foundation searching for 5-HT(2A/2C) antagonists, we now report on the synthesis of a series of substituted 2-(Dimethylaminomethyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives. The 5-HT(2A), 5-HT(2C) and H(1) receptor affinities as well as the mCPP antagonistic activity of the compounds synthesised is described.
|
Binding affinity towards Dopamine receptor D2 at 1.0 uM concentration
|
None
|
828.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
Inhibition of [3H]mepyramine binding with histamine H1 receptor in guinea pig cerebellum membranes after 30 min
|
Cavia porcellus
|
0.8511
nM
|
|
Journal : J. Med. Chem.
Title : The histamine H1-receptor antagonist binding site. A stereoselective pharmacophoric model based upon (semi-)rigid H1-antagonists and including a known interaction site on the receptor.
Year : 1995
Volume : 38
Issue : 17
First Page : 3351
Last Page : 3360
Authors : ter Laak AM, Venhorst J, Donné-Op den Kelder GM, Timmerman H.
Abstract : A new pharmacophoric model for the H1-antagonist binding site is derived which reveals that a simple atom to atom matching of compounds is not sufficient; in this model, interacting residues from the receptor need to be included. To obtain this model, the bioactive conformations of several (semi-)rigid classical histamine H1-receptor antagonists have been investigated (cyproheptadine, phenindamine, triprolidine, epinastine, mequitazine, IBF28145, and mianserine). In general, these antihistamines contain two aromatic rings and a basic nitrogen atom. A previously derived pharmacophoric model with the nitrogen position fixed relative to the two aromatic rings is now found not to be suitable for describing the H1-antagonist binding site. A procedure is described which allows for significant freedom in the position of the basic nitrogen of the histamine H1-antagonist. The area accessible to the basic nitrogen is confined to the region accessible to its counterion on the histamine H1-receptor, i.e., the carboxylate group of Asp116. The basic nitrogen is assumed to form an ionic hydrogen bond with this aspartic acid which C alpha- and C beta-carbons are fixed with respect to the protein backbone. Via this hydrogen bond, the direction of the acidic proton of the antagonist is taken into account. Within these computational procedures, an aspartic acid is coupled to the basic nitrogen of each H1-antagonist considered; the carboxylate group is connected to the positively charged nitrogen via geometric H-bonding restraints obtained from a thorough database search (CSD). Also to the basic nitrogen of the pharmacophore is coupled an aspartic acid (to yield our new template). In order to derive a model for the H1-antagonist binding site, the aromatic ring systems of the antagonists and template are matched according to a previously described procedure. Subsequently, the C alpha- and C beta-carbons of the aspartic acid coupled to the H1-antagonists are matched with those of the template in a procedure which allows the antagonist and the carboxylate group to adapt their conformation (and also their relative position) in order to optimize the overlap with the template. A six-point pharmacophoric model is derived which has stereoselective features and is furthermore able to distinguish between the so-called "cis"- and "trans"-rings mentioned in many (Q)SAR studies on H1-antagonists. Due to its stereoselectivity, the model is able to designate the absolute bioactive configuration of antihistamines such as phenindamine (S), epinastine (S), and IBF28145 (R). A further merit of this study is that a model is obtained which includes an amino acid from the receptor.(ABSTRACT TRUNCATED AT 400 WORDS)
|
The binding affinity at the Histamine H1 receptor determined using [3H]pyrilamine
|
Cavia porcellus
|
4.2
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
Binding affinity for human cloned Histamine H1 receptor expressed in CHO cells using [3H]pyrilamine as radioligand
|
None
|
3.388
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives: a novel series of 5-HT(2A/2C) receptor antagonists. Part 1.
Year : 2002
Volume : 12
Issue : 2
First Page : 243
Last Page : 248
Authors : Andrés JI, Alcázar J, Alonso JM, Díaz A, Fernández J, Gil P, Iturrino L, Matesanz E, Meert TF, Megens A, Sipido VK.
Abstract : The synthesis of a series of novel 2-(aminoalkyl)-2,3,3a,8-tetrahydrodibenzo[c,f]isoxazolo[2,3-a]azepine derivatives as well as their 5-HT(2A/2C) and H(1) receptor binding affinities are described. The in vivo activity as potential anxiolytics of the synthesised compounds was measured in a mCPP challenge test. One of the compounds, 2a, proved to be a potent 5-HT(2A/2C) receptor antagonist showing as well oral activity and therefore could be considered as a potential anxiolytic/antidepressant agent.
|
Compound tested for its inhibitory activity against Histamine H1 receptor
|
None
|
0.006
nM
|
|
Journal : J. Med. Chem.
Title : Development of predictive retention-activity relationship models of tricyclic antidepressants by micellar liquid chromatography.
Year : 1999
Volume : 42
Issue : 16
First Page : 3154
Last Page : 3162
Authors : Quiñones-Torrelo C, Sagrado S, Villanueva-Camañas RM, Medina-Hernández MJ.
Abstract : The distribution of tricyclic antidepressants from plasma to brain, where these drugs exert their main clinical action, and other organs is related to transport events across the cell membranes of the different tissues. It could be expected that all the molecular features that condition the transport processes (mainly hydrophobicity and molar total charge) also control the pharmacokinetic and biochemical behavior. Micellar liquid chromatography (MLC) has been proposed to emulate in vitro the partitioning process in the biomembranes. The use of micellar solutions of Brij35 as mobile phases in reversed-phase liquid chromatography has proven to be valid to predict the biological activities of local anesthetics, barbiturates, catecholamines, and benzodiazepines. In this paper, the relationships between the capacity factor in MLC and some pharmacokinetic parameters and biological responses of tricyclic antidepressants are studied. Predictive regression models for the estimation of these parameter values, using the logarithm of the retention data (log k) as independent variable, are also proposed.
|
Inhibitory activity against brain adenylate cyclase Histamine H2 receptor
|
Cavia porcellus
|
880.0
nM
|
|
Journal : J. Med. Chem.
Title : Development of predictive retention-activity relationship models of tricyclic antidepressants by micellar liquid chromatography.
Year : 1999
Volume : 42
Issue : 16
First Page : 3154
Last Page : 3162
Authors : Quiñones-Torrelo C, Sagrado S, Villanueva-Camañas RM, Medina-Hernández MJ.
Abstract : The distribution of tricyclic antidepressants from plasma to brain, where these drugs exert their main clinical action, and other organs is related to transport events across the cell membranes of the different tissues. It could be expected that all the molecular features that condition the transport processes (mainly hydrophobicity and molar total charge) also control the pharmacokinetic and biochemical behavior. Micellar liquid chromatography (MLC) has been proposed to emulate in vitro the partitioning process in the biomembranes. The use of micellar solutions of Brij35 as mobile phases in reversed-phase liquid chromatography has proven to be valid to predict the biological activities of local anesthetics, barbiturates, catecholamines, and benzodiazepines. In this paper, the relationships between the capacity factor in MLC and some pharmacokinetic parameters and biological responses of tricyclic antidepressants are studied. Predictive regression models for the estimation of these parameter values, using the logarithm of the retention data (log k) as independent variable, are also proposed.
|
Binding affinity towards histamine receptor by inhibiting specific binding of [3H]-mepyramine (3 nM) in vitro to membranes of rat brain without cerebellum
|
None
|
14.0
nM
|
|
Journal : J. Med. Chem.
Title : cis-1,3,4,6,7,11b-Hexahydro-2-methyl-7-phenyl-2H-pyrazino[2,1-a] isoquinoline: a new atypical antidepressant.
Year : 1984
Volume : 27
Issue : 8
First Page : 995
Last Page : 1003
Authors : Griffith RC, Gentile RJ, Robichaud RC, Frankenheim J.
Abstract : Molecular modelling studies suggested the synthesis of cis-1,3,4,6,7, 11b-hexahydro-2-methyl-7-phenyl-2H-pyrazino[2,1-a]isoquinoline (7a) as a rigid analogue of the atypical antidepressant mianserin. Acylation of 2,2-diphenylethylamine with chloroacetyl chloride gives the chloroacetamide (2). Cyclization of 2 with P2O5 in xylene provides 1-(chloromethyl)-3,4-dihydro-4-phenylisoquinoline (3). Amination of 3, followed by reduction, gives the isomeric (aminomethyl)tetrahydroisoquinolines (4a and 5). Treatment of 4a with diethyl oxalate, followed by reduction of the diamide with borane, provides 7a. A variety of N-substituted, aromatic substituted, and optically resolved derivatives were prepared and evaluated for anticholinergic, antihistaminic, and antidepressant activity. In particular, the target cis isomer 7a as predicted from the modelling studies appears to possess excellent atypical antidepressant activity. This activity resides in the (+)-S,S optical isomer 10, which has the same absolute configuration as (+)-mianserin.
|
The binding affinity at the Norepinephrine transporter reuptake sites determined using competition binding assay
|
None
|
22.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and pharmacological testing of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin and its enantiomers in comparison with the two antidepressants mianserin and mirtazapine.
Year : 2002
Volume : 45
Issue : 15
First Page : 3280
Last Page : 3285
Authors : Wikström HV, Mensonides-Harsema MM, Cremers TI, Moltzen EK, Arnt J.
Abstract : The synthesis and resolution of 1,2,3,4,10,14b-hexahydro-6-methoxy-2-methyldibenzo[c,f]pyrazino[1,2-a]azepin (6-methoxymianserin, 6) are described. Furthermore, the in vitro and in vivo effects of 6 and its enantiomers are presented. 6 displayed high affinity for the 5-HT2A/2C receptors, only moderate affinity for the adrenoceptors, and no affinity for the NA reuptake site. Surprisingly, 6 also showed moderate to high affinity for the dopamine D2 receptor, an effect that resides in the (R)-(-)-enantiomer.
|
Inhibition of specific [3H]-prazosin binding (0.2 nM) to rat brain membranes alpha1 adrenoceptor.
|
None
|
380.0
nM
|
|
Journal : J. Med. Chem.
Title : Quantitative relationships between alpha-adrenergic activity and binding affinity of alpha-adrenoceptor agonists and antagonists.
Year : 1984
Volume : 27
Issue : 4
First Page : 495
Last Page : 503
Authors : Timmermans PB, de Jonge A, Thoolen MJ, Wilffert B, Batink H, van Zwieten PA.
Abstract : Quantitative relationships between in vitro affinity for alpha 1- and alpha 2-adrenoceptors (specific binding sites in rat brain membranes of [3H]prazosin and [3H]clonidine, respectively) and in vitro and in vivo alpha 1/alpha 2-adrenoceptor agonist/antagonist activities were derived for a series of 11 alpha-adrenergic antagonists and 35 agonists of dissimilar chemical structure. For the antagonists, the alpha 1/alpha 2-binding selectivity ratio most significantly correlated with the functional alpha 1/alpha 2-blocking selectivity ratios assessed in vitro (rabbit isolated pulmonary artery: antagonism of alpha 1-adrenoceptor-induced vasoconstriction and alpha 2-adrenoceptor-evoked facilitation of transmitter release) and in vivo (antagonism of alpha 1- and alpha 2-adrenoceptor-mediated vasoconstriction in pithed normotensive rats). These results show that the in vitro alpha 1- and alpha 2-adrenoceptor binding affinities of the antagonists provide adequate information concerning their functional alpha 1- and alpha 2-adrenoceptor blocking potencies against agonists. For the agonists, the central, alpha 2-adrenoceptor-elicited, hypotensive activity was not correlated with alpha 1-adrenoceptor binding affinity but was most significantly described in terms of affinity for alpha 2-adrenoceptors and a parabolic dependence on log P' (octanol/buffer; pH 7.4; 37 degrees C). The relevance of log P' in the regression is explained by the difference in accessibility to the membrane-bound alpha 2-adrenoceptors in the radioligand displacement experiments and the central medullary (hypotensive) alpha 2-adrenoceptors in the intact animal. In contrast, the affinity parameters for alpha 1- and alpha 2-adrenoceptors were found to be poor descriptors of the hypertensive potency of the agonists in which alpha 1- and alpha 2-adrenoceptors are known to play a role. The correlations in which the individual binding parameters and the combination of both variables were included reached only a moderate significance level.(ABSTRACT TRUNCATED AT 250 WORDS)
|
Inhibition of specific [3H]clonidine binding (0.4 nM) to rat brain membranes alpha2 adrenoceptor
|
None
|
210.0
nM
|
|
Journal : J. Med. Chem.
Title : Quantitative relationships between alpha-adrenergic activity and binding affinity of alpha-adrenoceptor agonists and antagonists.
Year : 1984
Volume : 27
Issue : 4
First Page : 495
Last Page : 503
Authors : Timmermans PB, de Jonge A, Thoolen MJ, Wilffert B, Batink H, van Zwieten PA.
Abstract : Quantitative relationships between in vitro affinity for alpha 1- and alpha 2-adrenoceptors (specific binding sites in rat brain membranes of [3H]prazosin and [3H]clonidine, respectively) and in vitro and in vivo alpha 1/alpha 2-adrenoceptor agonist/antagonist activities were derived for a series of 11 alpha-adrenergic antagonists and 35 agonists of dissimilar chemical structure. For the antagonists, the alpha 1/alpha 2-binding selectivity ratio most significantly correlated with the functional alpha 1/alpha 2-blocking selectivity ratios assessed in vitro (rabbit isolated pulmonary artery: antagonism of alpha 1-adrenoceptor-induced vasoconstriction and alpha 2-adrenoceptor-evoked facilitation of transmitter release) and in vivo (antagonism of alpha 1- and alpha 2-adrenoceptor-mediated vasoconstriction in pithed normotensive rats). These results show that the in vitro alpha 1- and alpha 2-adrenoceptor binding affinities of the antagonists provide adequate information concerning their functional alpha 1- and alpha 2-adrenoceptor blocking potencies against agonists. For the agonists, the central, alpha 2-adrenoceptor-elicited, hypotensive activity was not correlated with alpha 1-adrenoceptor binding affinity but was most significantly described in terms of affinity for alpha 2-adrenoceptors and a parabolic dependence on log P' (octanol/buffer; pH 7.4; 37 degrees C). The relevance of log P' in the regression is explained by the difference in accessibility to the membrane-bound alpha 2-adrenoceptors in the radioligand displacement experiments and the central medullary (hypotensive) alpha 2-adrenoceptors in the intact animal. In contrast, the affinity parameters for alpha 1- and alpha 2-adrenoceptors were found to be poor descriptors of the hypertensive potency of the agonists in which alpha 1- and alpha 2-adrenoceptors are known to play a role. The correlations in which the individual binding parameters and the combination of both variables were included reached only a moderate significance level.(ABSTRACT TRUNCATED AT 250 WORDS)
|
Inhibition of norepinephrine (NE) into rat brain synaptosomes
|
Rattus norvegicus
|
26.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. Potent, enantioselective inhibition of tetrabenazine-induced ptosis and neuronal uptake of norepinephrine, dopamine, and serotonin.
Year : 1984
Volume : 27
Issue : 8
First Page : 943
Last Page : 946
Authors : Maryanoff BE, McComsey DF, Castanzo MJ, Setler PE, Gardocki JF, Shank RP, Schneider CR.
|
Inhibition of uptake of tritiated norepinephrine (NE) in rat synaptosomes
|
None
|
26.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
Compound was evaluated for its activity at membrane-bound receptor (M+L+P fraction) from rat frontal cortex
|
Rattus norvegicus
|
11.75
nM
|
|
Journal : J. Med. Chem.
Title : In vitro labeling of serotonin-S2 receptors: synthesis and binding characteristics of [3H]-7-aminoketanserin.
Year : 1986
Volume : 29
Issue : 9
First Page : 1663
Last Page : 1668
Authors : Wouters W, Janssen CG, Van Dun J, Thijssen JB, Laduron PM.
Abstract : [3H]-7-Aminoketanserin (7-amino-3-[2-[4-(2-tritio-4-fluorobenzoyl)-1- piperidinyl]ethyl]-2,4-(1H,3H)-quinazolinedione), an amino derivative of the selective serotonin-S2 antagonist ketanserin, was synthesized and tested for in vitro labeling of serotonin-S2 receptors. The compound showed a very high affinity for both membrane-bound and detergent-solubilized serotonin-S2 receptors with KD values of 0.35 and 2.03 nM, respectively. At nanomolar concentrations, binding to serotonin-S1 sites was totally absent. Serotonin-S2 receptor binding was characterized by a slow dissociation and a very low nonspecific binding. In rat frontal cortex preparations, binding could be displaced by nanomolar concentrations of different serotonin antagonists and micromolar concentrations of serotonin agonists. Compounds with other pharmacological profiles were poorly or not active. Introduction of an amino function in this new radioligand led to a decreased lipophilicity. Therefore, besides being a valuable radioligand for routine binding studies, [3H]-7-aminoketanserin will probably be a good ligand for labeling serotonin-S2 receptors on intact cells.
|
Compound was evaluated for its activity at solubilized receptor (CHAPS/salt-solubilized preparation) from rat frontal cortex
|
Rattus norvegicus
|
26.92
nM
|
|
Journal : J. Med. Chem.
Title : In vitro labeling of serotonin-S2 receptors: synthesis and binding characteristics of [3H]-7-aminoketanserin.
Year : 1986
Volume : 29
Issue : 9
First Page : 1663
Last Page : 1668
Authors : Wouters W, Janssen CG, Van Dun J, Thijssen JB, Laduron PM.
Abstract : [3H]-7-Aminoketanserin (7-amino-3-[2-[4-(2-tritio-4-fluorobenzoyl)-1- piperidinyl]ethyl]-2,4-(1H,3H)-quinazolinedione), an amino derivative of the selective serotonin-S2 antagonist ketanserin, was synthesized and tested for in vitro labeling of serotonin-S2 receptors. The compound showed a very high affinity for both membrane-bound and detergent-solubilized serotonin-S2 receptors with KD values of 0.35 and 2.03 nM, respectively. At nanomolar concentrations, binding to serotonin-S1 sites was totally absent. Serotonin-S2 receptor binding was characterized by a slow dissociation and a very low nonspecific binding. In rat frontal cortex preparations, binding could be displaced by nanomolar concentrations of different serotonin antagonists and micromolar concentrations of serotonin agonists. Compounds with other pharmacological profiles were poorly or not active. Introduction of an amino function in this new radioligand led to a decreased lipophilicity. Therefore, besides being a valuable radioligand for routine binding studies, [3H]-7-aminoketanserin will probably be a good ligand for labeling serotonin-S2 receptors on intact cells.
|
Compound was evaluated for its activity at membrane-bound receptor (M+L+P fraction) from rat frontal cortex
|
Rattus norvegicus
|
3.04
nM
|
|
Journal : J. Med. Chem.
Title : In vitro labeling of serotonin-S2 receptors: synthesis and binding characteristics of [3H]-7-aminoketanserin.
Year : 1986
Volume : 29
Issue : 9
First Page : 1663
Last Page : 1668
Authors : Wouters W, Janssen CG, Van Dun J, Thijssen JB, Laduron PM.
Abstract : [3H]-7-Aminoketanserin (7-amino-3-[2-[4-(2-tritio-4-fluorobenzoyl)-1- piperidinyl]ethyl]-2,4-(1H,3H)-quinazolinedione), an amino derivative of the selective serotonin-S2 antagonist ketanserin, was synthesized and tested for in vitro labeling of serotonin-S2 receptors. The compound showed a very high affinity for both membrane-bound and detergent-solubilized serotonin-S2 receptors with KD values of 0.35 and 2.03 nM, respectively. At nanomolar concentrations, binding to serotonin-S1 sites was totally absent. Serotonin-S2 receptor binding was characterized by a slow dissociation and a very low nonspecific binding. In rat frontal cortex preparations, binding could be displaced by nanomolar concentrations of different serotonin antagonists and micromolar concentrations of serotonin agonists. Compounds with other pharmacological profiles were poorly or not active. Introduction of an amino function in this new radioligand led to a decreased lipophilicity. Therefore, besides being a valuable radioligand for routine binding studies, [3H]-7-aminoketanserin will probably be a good ligand for labeling serotonin-S2 receptors on intact cells.
|
Compound was evaluated for its activity at solubilized receptor (CHAPS/salt-solubilized preparation) from rat frontal cortex
|
Rattus norvegicus
|
13.46
nM
|
|
Journal : J. Med. Chem.
Title : In vitro labeling of serotonin-S2 receptors: synthesis and binding characteristics of [3H]-7-aminoketanserin.
Year : 1986
Volume : 29
Issue : 9
First Page : 1663
Last Page : 1668
Authors : Wouters W, Janssen CG, Van Dun J, Thijssen JB, Laduron PM.
Abstract : [3H]-7-Aminoketanserin (7-amino-3-[2-[4-(2-tritio-4-fluorobenzoyl)-1- piperidinyl]ethyl]-2,4-(1H,3H)-quinazolinedione), an amino derivative of the selective serotonin-S2 antagonist ketanserin, was synthesized and tested for in vitro labeling of serotonin-S2 receptors. The compound showed a very high affinity for both membrane-bound and detergent-solubilized serotonin-S2 receptors with KD values of 0.35 and 2.03 nM, respectively. At nanomolar concentrations, binding to serotonin-S1 sites was totally absent. Serotonin-S2 receptor binding was characterized by a slow dissociation and a very low nonspecific binding. In rat frontal cortex preparations, binding could be displaced by nanomolar concentrations of different serotonin antagonists and micromolar concentrations of serotonin agonists. Compounds with other pharmacological profiles were poorly or not active. Introduction of an amino function in this new radioligand led to a decreased lipophilicity. Therefore, besides being a valuable radioligand for routine binding studies, [3H]-7-aminoketanserin will probably be a good ligand for labeling serotonin-S2 receptors on intact cells.
|
Binding affinity towards serotonin S1 receptor at 1.0 uM concentration
|
None
|
580.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
Inhibition of binding of Batrachotoxinin [3H]BTX-B to high affinity sites on voltage dependent sodium channels in a vesicular preparation from guinea pig cerebral cortex at 10 uM
|
Cavia porcellus
|
57.4
%
|
|
Journal : J. Med. Chem.
Title : [3H]Batrachotoxinin A 20 alpha-benzoate binding to voltage-sensitive sodium channels: a rapid and quantitative assay for local anesthetic activity in a variety of drugs.
Year : 1985
Volume : 28
Issue : 3
First Page : 381
Last Page : 388
Authors : McNeal ET, Lewandowski GA, Daly JW, Creveling CR.
Abstract : [3H]Batrachotoxinin A benzoate ( [3H]BTX-B) binds with high affinity to sites on voltage-dependent sodium channels in a vesicular preparation from guinea pig cerebral cortex. In this preparation, local anesthetics competitively antagonize the binding of [3H]BTX-B. The potencies of some 40 classical local anesthetics and a variety of catecholamine, histamine, serotonin, adenosine, GABA, glycine, acetylcholine, and calcium antagonists, tranquilizers, antidepressants, barbiturates, anticonvulsants, steroids, vasodilators, antiinflammatories, anticoagulants, analgesics, and other agents have been determined. An excellent correlation with the known local anesthetic activity of many of these agents indicate that antagonism of binding of [3H]BTX-B binding provides a rapid, quantitative, and facile method for the screening and investigation of local anesthetic activity.
|
Binding affinity towards alpha-1 adrenergic receptor at 1.0 uM concentration
|
None
|
99.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
Ability to displace [3H]clonidine from alpha-2 adrenergic receptor in rat brain homogenates in vitro
|
None
|
76.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and antidepressant properties of novel 2-substituted 4,5-dihydro-1H-imidazole derivatives.
Year : 1987
Volume : 30
Issue : 8
First Page : 1482
Last Page : 1489
Authors : Wentland MP, Bailey DM, Alexander EJ, Castaldi MJ, Ferrari RA, Haubrich DR, Luttinger DA, Perrone MH.
Abstract : A unique combination of alpha 2-adrenoreceptor antagonist and serotonin-selective reuptake inhibitory activities has been identified in a series of 2-substituted 4,5-dihydro-1H-imidazole derivatives. This combination of blocking activities has provided one of these derivatives, napamezole hydrochloride (2), with potential as an antidepressant. A discussion of the syntheses of these compounds includes a convenient method for the conversion of nitriles to imidazolines with ethylenediamine and trimethylaluminum.
|
Binding affinity towards alpha-2 adrenergic receptor at 1.0 uM concentration
|
None
|
62.0
nM
|
|
Journal : J. Med. Chem.
Title : Pyrroloisoquinoline antidepressants. 2. In-depth exploration of structure-activity relationships.
Year : 1987
Volume : 30
Issue : 8
First Page : 1433
Last Page : 1454
Authors : Maryanoff BE, McComsey DF, Gardocki JF, Shank RP, Costanzo MJ, Nortey SO, Schneider CR, Setler PE.
Abstract : A series of pyrrolo[2,1-a]isoquinolines, and related compounds, were examined for antidepressant-like activity, by virtue of their antagonism of tetrabenazine-induced ptosis and sedation, and inhibition of biogenic amine uptake. Thus, we have identified some of the most potent antagonists of TBZ-induced ptosis and some of the most potent inhibitors of the uptake of dopamine, norepinephrine, and serotonin (in rat brain synaptosomes) ever reported. Compounds of particular note, in this regard, are 52b, 29b, 22b, and 48b, respectively. Biological activity was chiefly manifested by the trans isomeric class. Also, through resolution of four compounds, 7b, 24b, 37b, and 48b, biological activity was found to be associated with the (+) enantiomer subgroup (salts measured at 589 nm in MeOH), corresponding to the 6S, 10bR absolute configuration for 7b, 37b, and 48b, and the 6R,10bR configuration for 24b. An X-ray determination on (+)-24b X HBr established its absolute configuration; configurations for the other compounds were verified by enantiospecific synthesis starting with (+)-(R)-2-phenylpyrrolidine. Regarding the pendant phenyl ring, diverse substitution patterns were investigated. Those substitutions that were particularly unfavorable were 3',4',5'-trimethoxy (20b), 2',3',4',5',6'-pentafluoro (34b), 2'-trifluoromethyl (38b), 3',5'-bis(trifluoromethyl) (42b), 4'-n-butyl (44b), 2'-cyano (47b), 4'-methylsulfonyl (50b), and 2'-carboxy (58b). Exceedingly potent compounds, in one way or another, were 10b-12b, 22b, 23b, 25b, 28b, 29b, 33b, 45b, 48b, 51b-53b. The pattern of aromatic substitution had a strong impact on selectivity in the uptake tests (NE vs. DA vs. 5-HT). Activity was significantly diminished by methyl substitution of 7b at the 5 (65, 66), 6 (61b), or 10b (60b) position, by changing the phenyl group of 7b to cyclohexyl (67b), benzyl (68b), or H (72), by moving the phenyl group of 7b to the 5 (69) or 10b (70) position, by expansion of ring B to an azepine (78b), and by modification of ring C to an azetidine (77b), piperidine (75b), or azepine (74b). The interaction of selected analogues with various CNS receptors is reported. Little affinity was shown for the muscarinic cholinergic receptor, suggesting a lack of anticholinergic side effects. Interestingly, 24b and 33b displayed a high affinity for the serotonin-2 receptor, analogous to mianserin and clomipramine. After the body of data was reviewed, derivatives 24b and 48b were chosen for advanced development.
|
In vitro antagonistic activity against alpha-2 adrenergic receptor in isolated electrically stimulated rat vas deferens (clonidine-induced decrease in twitch height)
|
None
|
158.49
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and antidepressant properties of novel 2-substituted 4,5-dihydro-1H-imidazole derivatives.
Year : 1987
Volume : 30
Issue : 8
First Page : 1482
Last Page : 1489
Authors : Wentland MP, Bailey DM, Alexander EJ, Castaldi MJ, Ferrari RA, Haubrich DR, Luttinger DA, Perrone MH.
Abstract : A unique combination of alpha 2-adrenoreceptor antagonist and serotonin-selective reuptake inhibitory activities has been identified in a series of 2-substituted 4,5-dihydro-1H-imidazole derivatives. This combination of blocking activities has provided one of these derivatives, napamezole hydrochloride (2), with potential as an antidepressant. A discussion of the syntheses of these compounds includes a convenient method for the conversion of nitriles to imidazolines with ethylenediamine and trimethylaluminum.
|
Inhibition of [3H]nisoxetine binding to rat Norepinephrine transporter
|
Rattus norvegicus
|
101.0
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]rauwolscine binding to Alpha-2A adrenergic receptor
|
Homo sapiens
|
4.8
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]rauwolscine binding to Alpha-2C adrenergic receptor
|
Homo sapiens
|
3.8
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]prazosin binding to rat Alpha-1 adrenergic receptor
|
Rattus norvegicus
|
74.0
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [125I]R91150 binding to human 5-hydroxytryptamine 2A receptor
|
Homo sapiens
|
4.3
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]mesulergine binding to human 5-hydroxytryptamine 2C receptor
|
Homo sapiens
|
4.4
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]pyrilamine binding to human Histamine H1 receptor
|
Homo sapiens
|
1.7
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of [3H]5-HT binding to human 5-hydroxytryptamine 7 receptor
|
Homo sapiens
|
56.0
nM
|
|
Journal : J. Med. Chem.
Title : Discovery of new tetracyclic tetrahydrofuran derivatives as potential broad-spectrum psychotropic agents.
Year : 2005
Volume : 48
Issue : 6
First Page : 1709
Last Page : 1712
Authors : Fernández J, Alonso JM, Andrés JI, Cid JM, Díaz A, Iturrino L, Gil P, Megens A, Sipido VK, Trabanco AA.
Abstract : A series of novel tetracyclic tetrahydrofuran derivatives was prepared and evaluated for its potential psychotropic properties. In vitro affinities for multiple dopaminergic, serotonergic, alpha-adrenergic, and histamine receptors and for the norepinephrine transporter as well as the ED(50) values obtained in some in vivo assays for antipsychotic, anxiolytic, and antidepressant potential are reported. Compounds (-)-1, (-)-8d, and (+)-8d have been identified as potential broad-spectrum psychotropic agents.
|
Inhibition of 4-(4-(dimethylamino)styryl)-N-methylpyridinium uptake at human OCT1 expressed in HEK293 cells at 100 uM by confocal microscopy
|
Homo sapiens
|
48.4
%
|
|
Journal : J. Med. Chem.
Title : Structural requirements for drug inhibition of the liver specific human organic cation transport protein 1.
Year : 2008
Volume : 51
Issue : 19
First Page : 5932
Last Page : 5942
Authors : Ahlin G, Karlsson J, Pedersen JM, Gustavsson L, Larsson R, Matsson P, Norinder U, Bergström CA, Artursson P.
Abstract : The liver-specific organic cation transport protein (OCT1; SLC22A1) transports several cationic drugs including the antidiabetic drug metformin and the anticancer agents oxaliplatin and imatinib. In this study, we explored the chemical space of registered oral drugs with the aim of studying the inhibition pattern of OCT1 and of developing predictive computational models of OCT1 inhibition. In total, 191 structurally diverse compounds were examined in HEK293-OCT1 cells. The assay identified 47 novel inhibitors and confirmed 15 previously known inhibitors. The enrichment of OCT1 inhibitors was seen in several drug classes including antidepressants. High lipophilicity and a positive net charge were found to be the key physicochemical properties for OCT1 inhibition, whereas a high molecular dipole moment and many hydrogen bonds were negatively correlated to OCT1 inhibition. The data were used to generate OPLS-DA models for OCT1 inhibitors; the final model correctly predicted 82% of the inhibitors and 88% of the noninhibitors of the test set.
|
Binding affinity to 5HT1A receptor
|
None
|
398.11
nM
|
|
Journal : J. Med. Chem.
Title : Physical binding pocket induction for affinity prediction.
Year : 2009
Volume : 52
Issue : 19
First Page : 6107
Last Page : 6125
Authors : Langham JJ, Cleves AE, Spitzer R, Kirshner D, Jain AN.
Abstract : Computational methods for predicting ligand affinity where no protein structure is known generally take the form of regression analysis based on molecular features that have only a tangential relationship to a protein/ligand binding event. Such methods have limited utility when structural variation moves beyond congeneric series. We present a novel approach based on the multiple-instance learning method of Compass, where a physical model of a binding site is induced from ligands and their corresponding activity data. The model consists of molecular fragments that can account for multiple positions of literal protein residues. We demonstrate the method on 5HT1a ligands by training on a series with limited scaffold variation and testing on numerous ligands with variant scaffolds. Predictive error was between 0.5 and 1.0 log units (0.7-1.4 kcal/mol), with statistically significant rank correlations. Accurate activity predictions of novel ligands were demonstrated using a validation approach where a small number of ligands of limited structural variation known at a fixed time point were used to make predictions on a blind test set of widely varying molecules, some discovered at a much later time point.
|
Displacement of [3H]ketanserin from 5HT2A in rat brain cerebral cortex after 20 mins by scintillation counting
|
Rattus norvegicus
|
5.0
nM
|
|
Journal : Eur. J. Med. Chem.
Title : Synthesis and biological investigation of potential atypical antipsychotics with a tropane core. Part 1.
Year : 2011
Volume : 46
Issue : 9
First Page : 4474
Last Page : 4488
Authors : Słowiński T, Stefanowicz J, Dawidowski M, Kleps J, Czuczwar S, Andres-Mach M, Łuszczki JJ, Nowak G, Stachowicz K, Szewczyk B, Sławińska A, Mazurek AP, Mazurek A, Pluciński F, Wolska I, Herold F.
Abstract : The synthesis, structure, in vitro and in vivo pharmacological activities of 3β-acylamine derivatives of tropane (4a-n, 5a-g, 6a,b, 8a-c) are described. Among the investigated compounds, several displayed very high (in nM) affinity for the monoamine receptors 5-HT(1A), 5-HT(2A,) and D(2). The most interesting agent 6b revealed very high affinity for the 5-HT(2A) and D(2) receptors and high affinity for the 5-HT(1A) receptor. The in vivo head twitch model was used to demonstrate antagonism of the 5-HT(2A) receptor subtype by this compound. In another test, 6b caused hypothermia in mice, which was not attenuated by WAY 100635. In the climbing test, the compound did not significantly modify climbing behaviour following apomorphine administration. Moreover, 6b significantly reduced locomotor activity in mice. Molecular docking studies using a homology model of the 5-HT(1A) receptor revealed a significant role of the N-8 atom of the tropane core in stabilising the ligand-receptor complex due to strong hydrogen bonding with Asp116 located in the TMH 3 helix. Analogically, in a homology model of the 5-HT(2A) receptor, the N-8 atom formed a hydrogen bond with Gly369. In another homology model of the D(2) receptor, strong hydrogen bonding of the amide moiety in the 3β position of the tropane nucleus with Asp85 was observed. Compound 6b displayed a favourable Meltzer index (1.21) which is a feature of atypical antipsychotic agents.
|
DRUGMATRIX: Muscarinic M1 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
343.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Muscarinic M2 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
383.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Muscarinic M3 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
298.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Muscarinic M4 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
288.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Muscarinic M5 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
320.0
nM
|
|
DRUGMATRIX: Muscarinic M5 radioligand binding (ligand: [3H] N-Methylscopolamine)
|
None
|
230.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT1A radioligand binding (ligand: [3H] 8-OH-DPAT)
|
None
|
872.0
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT1A radioligand binding (ligand: [3H] 8-OH-DPAT)
|
None
|
498.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2A radioligand binding (ligand: [3H] Ketanserin)
|
None
|
1.764
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2A radioligand binding (ligand: [3H] Ketanserin)
|
None
|
0.504
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Alpha-1A adrenergic receptor radioligand binding (ligand: prazosin)
|
Rattus norvegicus
|
224.0
nM
|
|
DRUGMATRIX: Alpha-1A adrenergic receptor radioligand binding (ligand: prazosin)
|
Rattus norvegicus
|
91.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Alpha-1B adrenergic receptor radioligand binding (ligand: prazosin)
|
Rattus norvegicus
|
119.0
nM
|
|
DRUGMATRIX: Alpha-1B adrenergic receptor radioligand binding (ligand: prazosin)
|
Rattus norvegicus
|
66.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Alpha-1D adrenergic receptor radioligand binding (ligand: prazosin)
|
None
|
83.0
nM
|
|
DRUGMATRIX: Alpha-1D adrenergic receptor radioligand binding (ligand: prazosin)
|
None
|
41.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Alpha-2A adrenergic receptor radioligand binding (ligand: MK-912)
|
None
|
43.0
nM
|
|
DRUGMATRIX: Alpha-2A adrenergic receptor radioligand binding (ligand: MK-912)
|
None
|
16.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Alpha-2B adrenergic receptor radioligand binding (ligand: Rauwolscine)
|
None
|
52.0
nM
|
|
DRUGMATRIX: Alpha-2B adrenergic receptor radioligand binding (ligand: Rauwolscine)
|
None
|
24.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Adrenergic Alpha-2C radioligand binding (ligand: [3H] MK-912)
|
None
|
179.0
nM
|
|
DRUGMATRIX: Adrenergic Alpha-2C radioligand binding (ligand: [3H] MK-912)
|
None
|
26.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Norepinephrine Transporter radioligand binding (ligand: [125I] RTI-55)
|
None
|
163.0
nM
|
|
DRUGMATRIX: Norepinephrine Transporter radioligand binding (ligand: [125I] RTI-55)
|
None
|
161.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2B radioligand binding (ligand: [3H] Lysergic acid diethylamide)
|
None
|
7.295
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2B radioligand binding (ligand: [3H] Lysergic acid diethylamide)
|
None
|
4.642
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2C radioligand binding (ligand: [3H] Mesulergine)
|
None
|
1.158
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2C radioligand binding (ligand: [3H] Mesulergine)
|
None
|
0.606
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT3 radioligand binding (ligand: [3H] GR-65630)
|
None
|
617.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT6 radioligand binding (ligand: [3H] Lysergic acid diethylamide)
|
None
|
85.0
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT6 radioligand binding (ligand: [3H] Lysergic acid diethylamide)
|
None
|
40.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Dopamine D1 radioligand binding (ligand: [3H] SCH-23390)
|
None
|
543.0
nM
|
|
DRUGMATRIX: Dopamine D1 radioligand binding (ligand: [3H] SCH-23390)
|
None
|
271.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Histamine H1, Central radioligand binding (ligand: [3H] Pyrilamine)
|
None
|
1.506
nM
|
|
DRUGMATRIX: Histamine H1, Central radioligand binding (ligand: [3H] Pyrilamine)
|
None
|
0.175
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Histamine H2 radioligand binding (ligand: [125I] Aminopotentidine)
|
None
|
992.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
DRUGMATRIX: Imidazoline I2, Central radioligand binding (ligand: [3H] Idazoxan)
|
Rattus norvegicus
|
124.0
nM
|
|
DRUGMATRIX: Imidazoline I2, Central radioligand binding (ligand: [3H] Idazoxan)
|
Rattus norvegicus
|
83.0
nM
|
|
Title : DrugMatrix in vitro pharmacology data
Authors : Scott S. Auerbach, DrugMatrix¨ and ToxFX¨ Coordinator National Toxicology Program
Abstract : The DrugMatrix Pharmacology data is a subset of the data freely available from the National Toxicology Program. For more details see:https://ntp.niehs.nih.gov/drugmatrix/index.html
|
Displacement of [3H]Ketanserin from 5HT2A receptor in Rattus norvegicus (rat) cerebral cortex by filter binding assay
|
Rattus norvegicus
|
3.5
nM
|
|
Journal : Med Chem Res
Title : Synthesis and pharmacological evaluation of 4-[2-hydroxy-3-(4-phenyl-piperazin-1-yl)-propoxy]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
Year : 2008
Volume : 17
Issue : 8
First Page : 507
Last Page : 514
Authors : Kossakowski J, Bielenica A, Struga M, Koziol AE
|
Displacement of [3H]mesulergine from human 5HT2C receptor expressed in tsA201 cell membranes after 1 hr by scintillation counting analysis
|
Homo sapiens
|
1.738
nM
|
|
Displacement of [3H]mesulergine from human 5HT2C receptor expressed in tsA201 cell membranes after 1 hr by scintillation counting analysis
|
Homo sapiens
|
1.7
nM
|
|
Journal : J. Med. Chem.
Title : Design, synthesis, and pharmacological characterization of N- and O-substituted 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol analogues: novel 5-HT(2A)/5-HT(2C) receptor agonists with pro-cognitive properties.
Year : 2013
Volume : 56
Issue : 3
First Page : 1211
Last Page : 1227
Authors : Jensen AA, Plath N, Pedersen MH, Isberg V, Krall J, Wellendorph P, Stensbøl TB, Gloriam DE, Krogsgaard-Larsen P, Frølund B.
Abstract : The isoxazol-3-one tautomer of the bicyclic isoxazole, 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol (THAZ), has previously been shown to be a weak GABA(A) and glycine receptor antagonist. In the present study, the potential in this scaffold has been explored through the synthesis and pharmacological characterization of a series of N- and O-substituted THAZ analogues. The analogues N-Bn-THAZ (3d) and O-Bn-THAZ (4d) were found to be potent agonists of the human 5-HT(2A) and 5-HT(2C) receptors. Judging from an elaborate pharmacological profiling at numerous other CNS targets, the 3d analogue appears to be selective for the two receptors. Administration of 3d substantially improved the cognitive performance of mice in a place recognition Y-maze model, an effect fully reversible by coadministration of the selective 5-HT(2C) antagonist SB242084. In conclusion, as novel bioavailable cognitive enhancers that most likely mediate their effects through 5-HT(2A) and/or 5-HT(2C) receptors, the isoxazoles 3d and 4d constitute interesting leads for further medicinal chemistry development.
|
Displacement of [3H]ketanserin from human 5HT2A receptor expressed in tsA201 cell membranes after 1 hr by scintillation counting analysis
|
Homo sapiens
|
26.92
nM
|
|
Displacement of [3H]ketanserin from human 5HT2A receptor expressed in tsA201 cell membranes after 1 hr by scintillation counting analysis
|
Homo sapiens
|
27.0
nM
|
|
Journal : J. Med. Chem.
Title : Design, synthesis, and pharmacological characterization of N- and O-substituted 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol analogues: novel 5-HT(2A)/5-HT(2C) receptor agonists with pro-cognitive properties.
Year : 2013
Volume : 56
Issue : 3
First Page : 1211
Last Page : 1227
Authors : Jensen AA, Plath N, Pedersen MH, Isberg V, Krall J, Wellendorph P, Stensbøl TB, Gloriam DE, Krogsgaard-Larsen P, Frølund B.
Abstract : The isoxazol-3-one tautomer of the bicyclic isoxazole, 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol (THAZ), has previously been shown to be a weak GABA(A) and glycine receptor antagonist. In the present study, the potential in this scaffold has been explored through the synthesis and pharmacological characterization of a series of N- and O-substituted THAZ analogues. The analogues N-Bn-THAZ (3d) and O-Bn-THAZ (4d) were found to be potent agonists of the human 5-HT(2A) and 5-HT(2C) receptors. Judging from an elaborate pharmacological profiling at numerous other CNS targets, the 3d analogue appears to be selective for the two receptors. Administration of 3d substantially improved the cognitive performance of mice in a place recognition Y-maze model, an effect fully reversible by coadministration of the selective 5-HT(2C) antagonist SB242084. In conclusion, as novel bioavailable cognitive enhancers that most likely mediate their effects through 5-HT(2A) and/or 5-HT(2C) receptors, the isoxazoles 3d and 4d constitute interesting leads for further medicinal chemistry development.
|
Antagonist activity at human 5HT2C receptor expressed in HEK293 cells assessed as inhibition of 5HT-induced intracellular calcium release measured for 90 secs by fluorescence assay
|
Homo sapiens
|
8.128
nM
|
|
Antagonist activity at human 5HT2C receptor expressed in HEK293 cells assessed as inhibition of 5HT-induced intracellular calcium release measured for 90 secs by fluorescence assay
|
Homo sapiens
|
8.0
nM
|
|
Journal : J. Med. Chem.
Title : Design, synthesis, and pharmacological characterization of N- and O-substituted 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol analogues: novel 5-HT(2A)/5-HT(2C) receptor agonists with pro-cognitive properties.
Year : 2013
Volume : 56
Issue : 3
First Page : 1211
Last Page : 1227
Authors : Jensen AA, Plath N, Pedersen MH, Isberg V, Krall J, Wellendorph P, Stensbøl TB, Gloriam DE, Krogsgaard-Larsen P, Frølund B.
Abstract : The isoxazol-3-one tautomer of the bicyclic isoxazole, 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol (THAZ), has previously been shown to be a weak GABA(A) and glycine receptor antagonist. In the present study, the potential in this scaffold has been explored through the synthesis and pharmacological characterization of a series of N- and O-substituted THAZ analogues. The analogues N-Bn-THAZ (3d) and O-Bn-THAZ (4d) were found to be potent agonists of the human 5-HT(2A) and 5-HT(2C) receptors. Judging from an elaborate pharmacological profiling at numerous other CNS targets, the 3d analogue appears to be selective for the two receptors. Administration of 3d substantially improved the cognitive performance of mice in a place recognition Y-maze model, an effect fully reversible by coadministration of the selective 5-HT(2C) antagonist SB242084. In conclusion, as novel bioavailable cognitive enhancers that most likely mediate their effects through 5-HT(2A) and/or 5-HT(2C) receptors, the isoxazoles 3d and 4d constitute interesting leads for further medicinal chemistry development.
|
Antagonist activity at human 5HT2A receptor expressed in HEK293 cells assessed as inhibition of 5HT-induced intracellular calcium release measured for 90 secs by fluorescence assay
|
Homo sapiens
|
8.128
nM
|
|
Antagonist activity at human 5HT2A receptor expressed in HEK293 cells assessed as inhibition of 5HT-induced intracellular calcium release measured for 90 secs by fluorescence assay
|
Homo sapiens
|
8.1
nM
|
|
Journal : J. Med. Chem.
Title : Design, synthesis, and pharmacological characterization of N- and O-substituted 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol analogues: novel 5-HT(2A)/5-HT(2C) receptor agonists with pro-cognitive properties.
Year : 2013
Volume : 56
Issue : 3
First Page : 1211
Last Page : 1227
Authors : Jensen AA, Plath N, Pedersen MH, Isberg V, Krall J, Wellendorph P, Stensbøl TB, Gloriam DE, Krogsgaard-Larsen P, Frølund B.
Abstract : The isoxazol-3-one tautomer of the bicyclic isoxazole, 5,6,7,8-tetrahydro-4H-isoxazolo[4,5-d]azepin-3-ol (THAZ), has previously been shown to be a weak GABA(A) and glycine receptor antagonist. In the present study, the potential in this scaffold has been explored through the synthesis and pharmacological characterization of a series of N- and O-substituted THAZ analogues. The analogues N-Bn-THAZ (3d) and O-Bn-THAZ (4d) were found to be potent agonists of the human 5-HT(2A) and 5-HT(2C) receptors. Judging from an elaborate pharmacological profiling at numerous other CNS targets, the 3d analogue appears to be selective for the two receptors. Administration of 3d substantially improved the cognitive performance of mice in a place recognition Y-maze model, an effect fully reversible by coadministration of the selective 5-HT(2C) antagonist SB242084. In conclusion, as novel bioavailable cognitive enhancers that most likely mediate their effects through 5-HT(2A) and/or 5-HT(2C) receptors, the isoxazoles 3d and 4d constitute interesting leads for further medicinal chemistry development.
|
Displacement of [3H]-ketanserin from human 5-HT2A receptor expressed in CHO-K1 cell membranes after 60 mins by scintillation counting method
|
Homo sapiens
|
2.2
nM
|
|
Journal : Eur J Med Chem
Title : Synthesis of a new series of aryl/heteroarylpiperazinyl derivatives of 8-acetyl-7-hydroxy-4-methylcoumarin with low nanomolar 5-HT1A affinities.
Year : 2017
Volume : 137
First Page : 108
Last Page : 116
Authors : Ostrowska K, Młodzikowska K, Głuch-Lutwin M, Gryboś A, Siwek A.
Abstract : We synthesized a series of aryl/heteroarylpiperazinyl derivatives of 8-acetyl-7-hydroxy-4-methylcoumarin and evaluated their antidepressant-like activity. We used a fast, microwave-assisted synthesis protocol and 1H, 13C NMR and HRMS spectrometry to confirm the structure of all compounds. We also used radioligand binding assays to determine the affinities towards 5-HT1A and 5-HT2A receptors and performed molecular docking studies to rationalize obtained results. Among the evaluated compounds seven displayed high affinity to the 5-HT1A (3a-1.3 nM, 5a-1.6 nM, 10a-1.6 nM, 11a-1.0 nM, 3b-1.0 nM, 5b-0.8 nM and 11b-1.5 nM) as well as significant 5-HT1A antagonist profiles. The equilibrium dissociation constant values of tested compounds shown differential intrinsic activity (3a-190 nM, 3b-28 nM, 5a-48 nM, 5b-23 nM, 10b-180 nM, 11a-99 nM, 11b-38 nM) of antagonist mode. Molecular docking studies using a homology model of 5-HT1A revealed that ligand 5b is stabilized mainly by hydrogen bonds to Ser190.
|
Displacement of [3H]-ketanserin from human 5-HT2A receptor expressed in CHO-K1 cell membranes after 60 mins by microbeta scintillation counting analysis
|
Homo sapiens
|
2.0
nM
|
|
Journal : Bioorg Med Chem
Title : 5-HT1A and 5-HT2A receptors affinity, docking studies and pharmacological evaluation of a series of 8-acetyl-7-hydroxy-4-methylcoumarin derivatives.
Year : 2018
Volume : 26
Issue : 2
First Page : 527
Last Page : 535
Authors : Ostrowska K, Grzeszczuk D, Głuch-Lutwin M, Gryboś A, Siwek A, Leśniak A, Sacharczuk M, Trzaskowski B.
Abstract : In this work we describe the synthesis, docking studies and biological evaluation of a focused library of novel arylpiperazinyl derivatives of 8-acetyl-7-hydroxy-4-methylcoumarin. The new compounds were screened for their 5-HT1A and 5-HT2A receptor affinity. Among the evaluated compounds, six displayed high affinities to 5-HT1A receptors (4a-0.9 nM, 6a-0.5 nM, 10a-0.6 nM, 3b-0.9 nM, 6b-1.5 nM, 10b-1 nM). Compound 6a and 10a bearing a bromo- or methoxy- substituent in ortho position of the piperazine phenyl ring, were identified as potent antagonists of the 5-HT1A receptors. In the tail suspension test, mice injected with 6a showed a dose-dependent increase in depressive-like behavior that was related to a decrease in locomotor activity. Compound 10a did not decrease or prolong immobility time nor did it affect home cage activity. Molecular docking studies using 5-HT1A and 5-HT2A homology models revealed structural basis of the high affinity of ortho-substituted derivatives and subtle changes in amino acid interactions patterns depending on the length of the alkyl linker.
|
Displacement of [3H]ketanserin from recombinant human 5-HT2A receptor expressed in HEK293 cell membranes after 60 mins by liquid scintillation counting method
|
Homo sapiens
|
3.2
nM
|
|
Journal : Bioorg Med Chem Lett
Title : Synthesis and activity of di- or trisubstituted N-(phenoxyalkyl)- or N-{2-[2-(phenoxy)ethoxy]ethyl}piperazine derivatives on the central nervous system.
Year : 2018
Volume : 28
Issue : 11
First Page : 2039
Last Page : 2049
Authors : Pańczyk K, Pytka K, Jakubczyk M, Rapacz A, Sałat K, Furgała A, Siwek A, Głuch-Lutwin M, Gryboś A, Słoczyńska K, Pękala E, Żmudzki P, Bucki A, Kołaczkowski M, Żelaszczyk D, Marona H, Waszkielewicz AM.
Abstract : Aim of the study was evaluation of anxiolytic, antidepressant, anticonvulsant and analgesic activity in a series of a consistent group of compounds. A series of eleven new N-(phenoxyalkyl)- or N-{2-[2-(phenoxy)ethoxy]ethyl}piperazine derivatives has been obtained. Their affinity towards 5-HT1A, 5-HT2A, 5-HT6, 5-HT7, D2 and α1 receptors has been assessed, and then functional assays were performed. The compounds were evaluated in mice, i.p. for their antidepressant-like (forced swim test), locomotor, anxiolytic-like (four-plate test) activities as well as - at higher doses - for anticonvulsant potential (MES) and neurotoxicity (rotarod). Two compounds (3, 6) were also evaluated for their analgesic activity in neuropathic pain models (streptozocin test, oxaliplatin test) and they were found active against allodynia in diabetic neuropathic pain at 30 mg/kg. Among the compounds, anxiolytic-like, anticonvulsant or analgesic activity was observed but antidepressant-like activity was not. One of the two most interesting compounds is 1-{2-[2-(2,4,6-trimethylphenoxy)ethoxy]ethyl}-4-(2-methoxyphenyl)piperazine dihydrochloride (9), exhibiting anxiolytic and anticonvulsant activity in mice, i.p. 30 min after administration (at 2.5 mg/kg and ED50 = 26.33 mg/kg, respectively), which can be justified by the receptor profile: 5-HT1A Ki = 5 nM (antagonist), 5-HT7 Ki = 70 nM, α1 Ki = 15 nM, D2 Ki = 189 nM (antagonist). Another interesting compound is 1-[3-(2,4,6-trimethylphenoxy)propyl]-4-(4-methoxyphenyl)piperazine dihydrochloride (3), exhibiting anxiolytic, anticonvulsant and antiallodynic activity in mice, i.p., 30 min after administration (at 10 mg/kg, ED50 = 23.50 mg/kg, at 30 mg/kg, respectively), which can be related with 5-HT1A weak antagonism (Ki = 146 nM), or other possible mechanism of action, not evaluated within presented study. Additionally, for the most active compound in the four-plate test (7), molecular modeling was performed (docking to receptors 5-HT1A, 5-HT2A, 5-HT7, D2 and α1A).
|
Displacement of [3H]-ketanserin from human 5-HT2A receptor expressed in CHOK1 cell membranes after 60 mins by microbeta scintillation counting method
|
Homo sapiens
|
1.2
nM
|
|
Journal : MedChemComm
Title : Development of selective agents targeting serotonin 5HT<sub>1A</sub> receptors with subnanomolar activities based on a coumarin core.
Year : 2017
Volume : 8
Issue : 8
First Page : 1690
Last Page : 1696
Authors : Ostrowska K, Grzeszczuk D, Głuch-Lutwin M, Gryboś A, Siwek A, Dobrzycki Ł, Trzaskowski B.
Abstract : A series of 18 new 5-[3-(4-aryl-1-piperazinyl)propoxy]coumarin derivatives from the corresponding bromoalkyl derivatives have been designed and synthesized by us using a microwave-assisted protocol. Radioligand binding assays of this series of compounds as well as a previously synthesized series of 17 structurally-similar compounds showed that six systems have very high affinities to the 5-HT<sub>1A</sub> receptor (0.3-1.0 nM) and good selectivity against the 5-HT<sub>2A</sub> receptor. Molecular docking, structural studies and structure-activity relationship studies were used to gain more insight into the atomistic details of ligand binding and rationalize the obtained results.
|
Displacement of [3H]- ketanserin from human recombinant 5-HT2A receptor expressed in HEK293 cells at 10'-6 M incubated for 60 mins by microbeta2 scintillation counter relative to control
|
Homo sapiens
|
98.0
%
|
|
Journal : Bioorg Med Chem
Title : Novel multitarget 5-arylidenehydantoins with arylpiperazinealkyl fragment: Pharmacological evaluation and investigation of cytotoxicity and metabolic stability.
Year : 2019
Volume : 27
Issue : 18
First Page : 4163
Last Page : 4173
Authors : Czopek A, Bucki A, Kołaczkowski M, Zagórska A, Drop M, Pawłowski M, Siwek A, Głuch-Lutwin M, Pękala E, Chrzanowska A, Struga M, Partyka A, Wesołowska A.
Abstract : On the basis of the structures of serotonin modulators or drugs (NAN-190, buspirone, aripiprazole) and phosphodiesterase 4 (PDE4) inhibitors (rolipram, RO-20-1724), a series of novel multitarget 5-arylidenehydantoin derivatives with arylpiperazine fragment was synthesized. Among these compounds, 5-(3,4-dimethoxybenzylidene-3-(4-(4-(2,3-dichlorophenyl)piperazine-1-yl)butyl)-imidazolidine-2,4-dione (13) and 5-(3-cyclopentyloxy-4-methoxybenzylidene-3-(4-(4-(2-methoxyphenyl)piperazine-1-yl)butyl)-imidazolidine-2,4-dione (18) were found to be the most promising showing very high affinity toward 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptors (K<sub>i</sub> = 0.2-1.0 nM) but a negligible inhibitory effect on PDE4. The high affinity of the compounds for 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptors was further investigated by computer-aided studies. Moreover, compounds 13 and 18 showed no significant cytotoxicity in the MTT assay, but high clearance in the in vitro assay. In addition, these compounds behaved like 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptor antagonists and exhibited antidepressant-like activity, similar to the reference drug citalopram, in an animal model of depression.
|
Displacement of [3H]-ketanserin from human recombinant 5-HT2A receptor expressed in HEK293 cells at 10'-7 M incubated for 60 mins by microbeta2 scintillation counter relative to control
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Homo sapiens
|
95.0
%
|
|
Journal : Bioorg Med Chem
Title : Novel multitarget 5-arylidenehydantoins with arylpiperazinealkyl fragment: Pharmacological evaluation and investigation of cytotoxicity and metabolic stability.
Year : 2019
Volume : 27
Issue : 18
First Page : 4163
Last Page : 4173
Authors : Czopek A, Bucki A, Kołaczkowski M, Zagórska A, Drop M, Pawłowski M, Siwek A, Głuch-Lutwin M, Pękala E, Chrzanowska A, Struga M, Partyka A, Wesołowska A.
Abstract : On the basis of the structures of serotonin modulators or drugs (NAN-190, buspirone, aripiprazole) and phosphodiesterase 4 (PDE4) inhibitors (rolipram, RO-20-1724), a series of novel multitarget 5-arylidenehydantoin derivatives with arylpiperazine fragment was synthesized. Among these compounds, 5-(3,4-dimethoxybenzylidene-3-(4-(4-(2,3-dichlorophenyl)piperazine-1-yl)butyl)-imidazolidine-2,4-dione (13) and 5-(3-cyclopentyloxy-4-methoxybenzylidene-3-(4-(4-(2-methoxyphenyl)piperazine-1-yl)butyl)-imidazolidine-2,4-dione (18) were found to be the most promising showing very high affinity toward 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptors (K<sub>i</sub> = 0.2-1.0 nM) but a negligible inhibitory effect on PDE4. The high affinity of the compounds for 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptors was further investigated by computer-aided studies. Moreover, compounds 13 and 18 showed no significant cytotoxicity in the MTT assay, but high clearance in the in vitro assay. In addition, these compounds behaved like 5-HT<sub>1A</sub> and 5-HT<sub>7</sub> receptor antagonists and exhibited antidepressant-like activity, similar to the reference drug citalopram, in an animal model of depression.
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Displacement of [3H]ketanserin from human 5HT2A receptor expressed in HEK293 cells incubated for 1.5 hrs by Cheng-Prusoff analysis based microbeta scintillation counting method
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Homo sapiens
|
2.8
nM
|
|
Journal : Eur J Med Chem
Title : Synthesis of new 5,6,7,8-tetrahydropyrido[1,2-c]pyrimidine derivatives with rigidized tryptamine moiety as potential SSRI and 5-HT<sub>1A</sub> receptor ligands.
Year : 2019
Volume : 180
First Page : 383
Last Page : 397
Authors : Ślifirski G, Król M, Kleps J, Podsadni P, Belka M, Bączek T, Siwek A, Stachowicz K, Szewczyk B, Nowak G, Bojarski A, Kozioł AE, Turło J, Herold F.
Abstract : Extended studies in the 4-aryl-pyrido[1,2-c]pyrimidine group resulted in 27 new compounds (10.1-10.27), 5,6,7,8-tetrahydropyrido[1,2-c]pyrimidine derivatives. In vitro tests (RBA) were carried out for 10.1-10.27 compounds in order to determine their affinity to 5-HT<sub>1A</sub> receptor and SERT protein. 10.1-10.3, 10.6, 10.7, 10.16 and 10.27 compounds had high binding ability to both molecular targets (5-HT<sub>1A</sub> K<sub>i</sub> = 8-87 nM; SERT K<sub>i</sub> = 8-52 nM). For these compounds (10.1-10.3, 10.6, 10.7, 10.16, 10.27) further in vitro, in vivo and metabolic stability tests were performed. In vitro studies in the extended receptor profile (D<sub>2</sub>, 5-HT<sub>2A</sub>, 5-HT<sub>6</sub> and 5-HT<sub>7</sub>) showed their selectivity towards 5-HT<sub>1A</sub> receptor and SERT protein. In vivo tests revealed that compounds 10.7 and 10.16 had the properties of presynaptic antagonists of the 5-HT<sub>1A</sub> receptor. The redesign of the 2H-pyrido[1,2-c]pyrimidine residue present in the terminal part towards 5,6,7,8-tetrahydropyrido[1,2-c]pyrimidine resulted in the improved metabolic stability and enhanced affinity to both molecular targets (5-HT<sub>1A</sub>-R and SERT) compared to the precursors.
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Displacement of [3H]-ketanserin from recombinant human 5HT2A receptor expressed in HEK293 cells measured after 1.5 hrs by microbeta scintillation counting analysis
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Homo sapiens
|
2.8
nM
|
|
Journal : Eur J Med Chem
Title : Synthesis of novel pyrido[1,2-c]pyrimidine derivatives with rigidized tryptamine moiety as potential SSRI and 5-HT1A receptor ligands.
Year : 2019
Volume : 166
First Page : 144
Last Page : 158
Authors : Ślifirski G, Król M, Kleps J, Ulenberg S, Belka M, Bączek T, Siwek A, Stachowicz K, Szewczyk B, Nowak G, Bojarski A, Kozioł AE, Turło J, Herold F.
Abstract : The study enabled obtaining a number of new derivatives of 4-aryl-pyrido[1,2-c]pyrimidine 9.1-9.27 having conformationally restricted tryptamine moiety. In vitro studies (RBA) have shown that derivatives 9.1, 9.2, 9.4, 9.7, 9.9, 9.14 and 9.27 exhibit high affinity to molecular targets 5-HT1A receptor and SERT protein. In general, compounds with an unsubstituted or a para-substituted benzene ring of the pyrido[1,2-c]pyrimidine residue in the terminal part were characterized by higher binding ability, which can be justified by the greater flexibility of the structure. For the selected compounds 9.1, 9.7, 9.9 and 9.27, further in vitro, in vivo and metabolic stability tests were performed. The in vitro studies in the extended receptor profile (D2, 5-HT2A, 5-HT6 and 5-HT7) indicated their selectivity toward the 5-HT1A receptor and SERT protein. The in vivo studies (8-OH-DPAT-induced hypothermia in mice, FST) revealed that the compound 9.1 has the properties of presynaptic agonist of the 5-HT1A receptor, and compound 9.7 demonstrated the properties of a presynaptic antagonist of the 5-HT1A receptor. Metabolic stability studies, in turn, showed that compounds 9.1, 9.7 and 9.9, having an unsubstituted indole residue, were more resistant to biotransformation reactions of the first pass phase than was compound 9.27 containing a 5-methoxy-substituted indole residue. The obtained results allowed further optimization of the structure.
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Displacement of [3H]-ketanserin from recombinant human 5HT2A receptor expressed in CHOK1 cell membranes measured after 1 hr by microbeta counting method
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Homo sapiens
|
1.905
nM
|
|
Journal : Eur J Med Chem
Title : Multifunctional 6-fluoro-3-[3-(pyrrolidin-1-yl)propyl]-1,2-benzoxazoles targeting behavioral and psychological symptoms of dementia (BPSD).
Year : 2020
Volume : 191
First Page : 112149
Last Page : 112149
Authors : Bucki A,Marcinkowska M,Śniecikowska J,Zagórska A,Jamrozik M,Pawłowski M,Głuch-Lutwin M,Siwek A,Jakubczyk M,Pytka K,Jastrzębska-Więsek M,Partyka A,Wesołowska A,Mierzejewski P,Kołaczkowski M
Abstract : Patients suffering from dementia experience cognitive deficits and 90% of them show non-cognitive behavioral and psychological symptoms of dementia (BPSD). The spectrum of BPSD includes agitation, depression, anxiety and psychosis. Antipsychotics, e.g. quetiapine, have been commonly used off-label to control the burdensome symptoms, though they cause serious side effects and further cognitive impairment. Therefore, the development of targeted therapy for BPSD, suitable for elderly patients, remains relevant. A multitarget-directed ligand, acting on serotonin 5-HT and dopamine D receptors (R) and thus exerting anti-aggressive and antipsychotic activity, as well as on 5-HTRs and 5-HTRs (potential pro-cognitive, antidepressant and anxiolytic activity), poses a promising strategy for the treatment of BPSD. Antitargeting muscarinic MR and hERG channel is expected to reduce the risk of side effects. We obtained a series of stereoisomeric compounds by combining 6-fluoro-1,2-benzoxazole moiety and arylsulfonamide fragment through pyrrolidin-1-yl-propyl linker. N-[(3R)-1-[3-(6-fluoro-1,2-benzoxazol-3-yl)propyl]pyrrolidin-3-yl]-1-benzothiophene-2-sulfonamide showed a substantial affinity for the targets of interest (pK = 8.32-9.35) and no significant interaction with the antitargets. Functional studies revealed its antagonist efficacy (pK = 7.41-9.03). The lead compound showed a promising profile of antipsychotic-like activity in amphetamine- and MK-801-induced hyperlocomotion (MED = 2.5 mg/kg), antidepressant-like, as well as anxiolytic-like activity in mice (MED = 0.312 and 1.25 mg/kg in the forced swim and four-plate tests, respectively). Notably, the novel compound didn't affect spontaneous locomotor activity, nor induced catalepsy or memory deficits (step-through passive avoidance test) in therapeutically relevant doses, which proved its benign safety profile. The overall pharmacological characteristics of the lead compound outperformed the reference drug quetiapine, making it a promising option for evaluation in the treatment of BPSD.
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Displacement of [3H]-ketanserin from rat cerebral cortex 5HT2A receptor measured after 20 mins by liquid scintillation counter method
|
Rattus norvegicus
|
18.4
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and biological investigation of new equatorial (β) stereoisomers of 3-aminotropane arylamides with atypical antipsychotic profile.
Year : 2016
Volume : 24
Issue : 18.0
First Page : 3994
Last Page : 4007
Authors : Stefanowicz J,Słowiński T,Wróbel MZ,Herold F,Gomółka AE,Wesołowska A,Jastrzębska-Więsek M,Partyka A,Andres-Mach M,Czuczwar SJ,Łuszczki JJ,Zagaja M,Siwek A,Nowak G,Żołnierek M,Bączek T,Ulenberg S,Belka M,Turło J
Abstract : A series of novel 3β-aminotropane derivatives containing a 2-naphthalene or a 2-quinoline moiety was synthesised and evaluated for their affinity for 5-HT1A, 5-HT2A and D2 receptors. Their affinity for the receptors was in the nanomolar to micromolar range. p-Substitution (6c, 6f, 6i, 6l, 6o), as well as substitution with chlorine atoms (6g, 6h, 6i), led to a significant increase in binding affinity for D2 receptors with compounds 6f (Ki=0.6nM), 6c and 6i (Ki=0.4nM), having the highest binding affinities. m-Substituted derivatives were the most promising ligands in terms of 5-HT2A receptor binding affinity whereas 2-quinoline derivatives (10a, 10b) displayed the highest affinity for 5-HT1AR and were the most selective ligands with Ki=62.7nM and Ki=30.5nM, respectively. Finally, the selected ligands 6b, 6d, 6e, 6g, 6h, 6k, 6n and 6o, with triple binding activity for the D2, 5-HT1A and 5-HT2A receptors, were subjected to in vivo tests, such as those for induced hypothermia, climbing behaviour and the head twitch response, in order to determine their pharmacological profile. The tested ligands presented neither agonist nor antagonist properties for the 5-HT1A receptors in the induced hypothermia and lower lip retraction (LLR) tests. All tested compounds displayed antagonistic activity against 5-HT2A, with 6n and 6o being the most active. Four (6b, 6k, 6n and 6o) out of eight tested compounds could be classified as D2 antagonists. Additionally, evaluation of metabolic stability was performed for selected ligands, and introduction of halogen atoms into the benzene ring of 6h, 6k, 6n and 6o improved their metabolic stability. The project resulted in the selection of the lead compounds 6n and 6o, which had antipsychotic profiles, combining dopamine D2-receptor and 5-HT2A antagonism and metabolic stability.
