|
Compound was tested for inhibition of daunomycin efflux in the resistant human T-lymphoblast cell line CEM vcr1000.
|
None
|
320.0
nM
|
|
Journal : J. Med. Chem.
Title : Substituted 4-acylpyrazoles and 4-acylpyrazolones: synthesis and multidrug resistance-modulating activity.
Year : 1998
Volume : 41
Issue : 21
First Page : 4001
Last Page : 4011
Authors : Chiba P, Holzer W, Landau M, Bechmann G, Lorenz K, Plagens B, Hitzler M, Richter E, Ecker G.
Abstract : A series of 4-acyl-3-pyrazolone derivatives with a 3-substituted 2-hydroxy-3-aminopropyl chain attached to pyrazole N-1 (7-20) as well as isomeric 4-acyl-5-(3-substituted 3-amino-2-hydroxypropoxy)pyrazole derivatives (5, 6) were synthesized, and their multidrug resistance (MDR)-modulating activity was measured using the daunomycin efflux assay. Reaction of N1-substituted 4-acyl-3-pyrazolones (tautomer to 4-acyl-5-hydroxypyrazoles) with excessive epichlorohydrin and successive treatment with an appropriate amine resulted in N-alkylation and thus afforded the target pyrazolone derivatives 7-20. In contrast, O-alkylation occurred upon reaction with 1 equiv of epichlorohydrin and subsequent treatment with amine leading to the corresponding 4-acyl-5-pyrazolyl ethers 5 and 6. QSAR studies showed a good correlation of MDR-modulating activity with lipophilicity of the compounds. Inclusion of hydrogen bond acceptor strength and steric parameters as descriptors led to a QSAR equation with remarkably increased predictive power (r2cv = 0.92). Additionally, ortho substitution of the propanolamine side chain and the acyl moiety is favorable. Detailed NMR spectroscopic investigations were carried out with the title compounds.
|
Inhibitory concentration against IKr potassium channel
|
None
|
800.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : The pharmacophore hypotheses of I(Kr) potassium channel blockers: novel class III antiarrhythmic agents.
Year : 2004
Volume : 14
Issue : 18
First Page : 4771
Last Page : 4777
Authors : Du LP, Tsai KC, Li MY, You QD, Xia L.
Abstract : Predictive pharmacophore models were developed for a large series of I(Kr) potassium channel blockers as class III antiarrhythmic agents using HypoGen in Catalyst software. The pharmacophore hypotheses were generated using a training set consisting of 34 compounds carefully selected from documents. Their biological data, expressed as IC(50), spanned from 1.5 nM to 2.8 mM with 7 orders difference. The most predictive hypothesis (Hypo1), consisting of four features (one positive ionizable feature, two aromatic rings and one hydrophobic group), had a best correlation coefficient of 0.825, a lowest rms deviation of 1.612, and a highest cost difference (null cost-total cost) of 77.552, which represents a true correlation and a good predictivity. The hypothesis Hypo1 was then validated by a test set consisting of 21 compounds and by a cross-validation of 95% confidence level with randomizing the data using CatScramble program. Accordingly, our model has strong predictivity to identify structural diverse I(Kr) potassium channel blockers with desired biological activity by virtual screening
|
Inhibition of P-glycoprotein expressed in MDR CCRF vcr1000 cells by daunorubicin efflux assay
|
Homo sapiens
|
329.0
nM
|
|
Journal : J. Med. Chem.
Title : Self-organizing maps for identification of new inhibitors of P-glycoprotein.
Year : 2007
Volume : 50
Issue : 7
First Page : 1698
Last Page : 1702
Authors : Kaiser D, Terfloth L, Kopp S, Schulz J, de Laet R, Chiba P, Ecker GF, Gasteiger J.
Abstract : Self-organizing maps were trained to separate high- and low-active propafenone-type inhibitors of P-glycoprotein. The trained maps were subsequently used to identify highly active compounds in a virtual screen of the SPECS compound library.
|
Inhibition of 4-(4-(dimethylamino)styryl)-N-methylpyridinium uptake at human OCT1 expressed in HEK293 cells at 100 uM by confocal microscopy
|
Homo sapiens
|
83.8
%
|
|
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.
|
NOVARTIS: Inhibition of Plasmodium falciparum 3D7 (drug-susceptible) proliferation in erythrocyte-based infection assay
|
Plasmodium falciparum
|
252.1
nM
|
|
Journal : Proc. Natl. Acad. Sci. U.S.A.
Title : In silico activity profiling reveals the mechanism of action of antimalarials discovered in a high-throughput screen.
Year : 2008
Volume : 105
Issue : 26
First Page : 9059
Last Page : 9064
Authors : Plouffe D, Brinker A, McNamara C, Henson K, Kato N, Kuhen K, Nagle A, Adrián F, Matzen JT, Anderson P, Nam TG, Gray NS, Chatterjee A, Janes J, Yan SF, Trager R, Caldwell JS, Schultz PG, Zhou Y, Winzeler EA.
Abstract : The growing resistance to current first-line antimalarial drugs represents a major health challenge. To facilitate the discovery of new antimalarials, we have implemented an efficient and robust high-throughput cell-based screen (1,536-well format) based on proliferation of Plasmodium falciparum (Pf) in erythrocytes. From a screen of approximately 1.7 million compounds, we identified a diverse collection of approximately 6,000 small molecules comprised of >530 distinct scaffolds, all of which show potent antimalarial activity (<1.25 microM). Most known antimalarials were identified in this screen, thus validating our approach. In addition, we identified many novel chemical scaffolds, which likely act through both known and novel pathways. We further show that in some cases the mechanism of action of these antimalarials can be determined by in silico compound activity profiling. This method uses large datasets from unrelated cellular and biochemical screens and the guilt-by-association principle to predict which cellular pathway and/or protein target is being inhibited by select compounds. In addition, the screening method has the potential to provide the malaria community with many new starting points for the development of biological probes and drugs with novel antiparasitic activities.
|
NOVARTIS: Inhibition of Plasmodium falciparum W2 (drug-resistant) proliferation in erythrocyte-based infection assay
|
Plasmodium falciparum
|
116.5
nM
|
|
Journal : Proc. Natl. Acad. Sci. U.S.A.
Title : In silico activity profiling reveals the mechanism of action of antimalarials discovered in a high-throughput screen.
Year : 2008
Volume : 105
Issue : 26
First Page : 9059
Last Page : 9064
Authors : Plouffe D, Brinker A, McNamara C, Henson K, Kato N, Kuhen K, Nagle A, Adrián F, Matzen JT, Anderson P, Nam TG, Gray NS, Chatterjee A, Janes J, Yan SF, Trager R, Caldwell JS, Schultz PG, Zhou Y, Winzeler EA.
Abstract : The growing resistance to current first-line antimalarial drugs represents a major health challenge. To facilitate the discovery of new antimalarials, we have implemented an efficient and robust high-throughput cell-based screen (1,536-well format) based on proliferation of Plasmodium falciparum (Pf) in erythrocytes. From a screen of approximately 1.7 million compounds, we identified a diverse collection of approximately 6,000 small molecules comprised of >530 distinct scaffolds, all of which show potent antimalarial activity (<1.25 microM). Most known antimalarials were identified in this screen, thus validating our approach. In addition, we identified many novel chemical scaffolds, which likely act through both known and novel pathways. We further show that in some cases the mechanism of action of these antimalarials can be determined by in silico compound activity profiling. This method uses large datasets from unrelated cellular and biochemical screens and the guilt-by-association principle to predict which cellular pathway and/or protein target is being inhibited by select compounds. In addition, the screening method has the potential to provide the malaria community with many new starting points for the development of biological probes and drugs with novel antiparasitic activities.
|
Inhibition of CETP in rabbit serum at 10 uM after 1 hr by fluorescent cholesteryl esters transfer assay
|
Oryctolagus cuniculus
|
0.0
%
|
|
Journal : Eur. J. Med. Chem.
Title : Discovery of new cholesteryl ester transfer protein inhibitors via ligand-based pharmacophore modeling and QSAR analysis followed by synthetic exploration.
Year : 2010
Volume : 45
Issue : 4
First Page : 1598
Last Page : 1617
Authors : Abu Khalaf R, Abu Sheikha G, Bustanji Y, Taha MO.
Abstract : Cholesteryl ester transfer protein (CETP) is involved in trafficking lipoprotein particles and neutral lipids between HDL and LDL and therefore is considered a valid target for treating dyslipidemic conditions and complications. Pharmacophore modeling and quantitative structure-activity relationship (QSAR) analysis were combined to explore the structural requirements for potent CETP inhibitors. Two pharmacophores emerged in the optimal QSAR equation (r(2)=0.800, n=96, F=72.1, r(2)(LOO) =0.775, r(2)(PRESS) against 22 external test inhibitors=0.707) suggesting the existence of at least two distinct binding modes accessible to ligands within CETP binding pocket. The successful pharmacophores were complemented with strict shape constraints in an attempt to optimize their receiver-operating characteristic (ROC) curve profiles. The validity of our modeling approach was experimentally established by the identification of several CETP inhibitory leads retrieved via in silico screening of the National Cancer Institute (NCI) list of compounds and an in house built database of drugs and agrochemicals. Two hits illustrated low micromolar IC(50) values: NSC 40331 (IC(50)=6.5 microM) and NSC 89508 (IC(50)=1.9 microM). Active hits were then used to guide synthetic exploration of a new series of CETP inhibitors.
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT1A radioligand binding (ligand: [3H] 8-OH-DPAT)
|
None
|
935.0
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
|
654.0
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2A radioligand binding (ligand: [3H] Ketanserin)
|
None
|
187.0
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 beta1 radioligand binding (ligand: [125I] Cyanopindolol)
|
None
|
354.0
nM
|
|
DRUGMATRIX: Adrenergic beta1 radioligand binding (ligand: [125I] Cyanopindolol)
|
None
|
205.0
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 beta2 radioligand binding (ligand: [3H] CGP-12177)
|
None
|
52.0
nM
|
|
DRUGMATRIX: Adrenergic beta2 radioligand binding (ligand: [3H] CGP-12177)
|
None
|
36.0
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 beta3 radioligand binding (ligand: [125I] Cyanopindolol)
|
None
|
424.0
nM
|
|
DRUGMATRIX: Adrenergic beta3 radioligand binding (ligand: [125I] Cyanopindolol)
|
None
|
318.0
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: Calcium Channel Type L, Benzothiazepine radioligand binding (ligand: [3H] Diltiazem)
|
Rattus norvegicus
|
775.0
nM
|
|
DRUGMATRIX: Calcium Channel Type L, Benzothiazepine radioligand binding (ligand: [3H] Diltiazem)
|
Rattus norvegicus
|
689.0
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
|
92.0
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2B radioligand binding (ligand: [3H] Lysergic acid diethylamide)
|
None
|
58.0
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-HT2C radioligand binding (ligand: [3H] Mesulergine)
|
None
|
384.0
nM
|
|
DRUGMATRIX: Serotonin (5-Hydroxytryptamine) 5-HT2C radioligand binding (ligand: [3H] Mesulergine)
|
None
|
201.0
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
|
865.0
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
|
Antimalarial activity against erythrocytic stage of chloroquine-resistant Plasmodium falciparum K1 after 72 hrs by FACS method
|
Plasmodium falciparum K1
|
200.0
nM
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Antimalarial activity against erythrocytic stage of chloroquine-resistant Plasmodium falciparum K1 after 72 hrs by spectrophotometry
|
Plasmodium falciparum K1
|
920.0
nM
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Cav1.2 at 10 uM after 5 mins by patch clamp assay
|
None
|
72.5
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Cav3.2 at 10 uM after 5 mins by patch clamp assay
|
None
|
60.2
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of HCN2 at 10 uM after 5 mins by patch clamp assay
|
None
|
47.8
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of HCN4 at 10 uM after 5 mins by patch clamp assay
|
None
|
54.6
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of human ERG at 10 uM after 5 mins by patch clamp assay
|
Homo sapiens
|
96.9
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Kir2.1 at 10 uM after 5 mins by patch clamp assay
|
None
|
0.2
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Kir3.1/3.4 at 10 uM after 5 mins by patch clamp assay
|
None
|
46.4
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Kir6.2/SUR2A at 10 uM after 5 mins by patch clamp assay
|
None
|
89.6
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Kv1.5 at 10 uM after 5 mins by patch clamp assay
|
None
|
65.4
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Kv4.3 at 10 uM after 5 mins by patch clamp assay
|
None
|
44.1
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of KvLQT/minK at 10 uM after 5 mins by patch clamp assay
|
None
|
33.0
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Nav1.5 assessed as tonic inhibition at 10 uM after 5 mins by patch clamp assay
|
None
|
93.4
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of Nav1.5 assessed as phasic inhibition at 10 uM after 5 mins by patch clamp assay
|
None
|
97.1
%
|
|
Journal : J. Med. Chem.
Title : Optimization of propafenone analogues as antimalarial leads.
Year : 2011
Volume : 54
Issue : 21
First Page : 7477
Last Page : 7485
Authors : Lowes DJ, Guiguemde WA, Connelly MC, Zhu F, Sigal MS, Clark JA, Lemoff AS, Derisi JL, Wilson EB, Guy RK.
Abstract : Propafenone, a class Ic antiarrythmic drug, inhibits growth of cultured Plasmodium falciparum. While the drug's potency is significant, further development of propafenone as an antimalarial would require divorcing the antimalarial and cardiac activities as well as improving the pharmacokinetic profile of the drug. A small array of propafenone analogues was designed and synthesized to address the cardiac ion channel and PK liabilities. Testing of this array revealed potent inhibitors of the 3D7 (drug sensitive) and K1 (drug resistant) strains of P. falciparum that possessed significantly reduced ion channel effects and improved metabolic stability. Propafenone analogues are unusual among antimalarial leads in that they are more potent against the multidrug resistant K1 strain of P. falciparum compared to the 3D7 strain.
|
Inhibition of P-glycoprotein-mediated daunorubicin efflux from human CCRF-CEM/VCR1000 cells after 240 secs by FACS flow cytometric analysis
|
Homo sapiens
|
331.13
nM
|
|
Journal : J. Med. Chem.
Title : Structure-activity relationships, ligand efficiency, and lipophilic efficiency profiles of benzophenone-type inhibitors of the multidrug transporter P-glycoprotein.
Year : 2012
Volume : 55
Issue : 7
First Page : 3261
Last Page : 3273
Authors : Jabeen I, Pleban K, Rinner U, Chiba P, Ecker GF.
Abstract : The drug efflux pump P-glycoprotein (P-gp) has been shown to promote multidrug resistance (MDR) in tumors as well as to influence ADME properties of drug candidates. Here we synthesized and tested a series of benzophenone derivatives structurally analogous to propafenone-type inhibitors of P-gp. Some of the compounds showed ligand efficiency and lipophilic efficiency (LipE) values in the range of compounds which entered clinical trials as MDR modulators. Interestingly, although lipophilicity plays a dominant role for P-gp inhibitors, all compounds investigated showed LipE values below the threshold for promising drug candidates. Docking studies of selected analogues into a homology model of P-glycoprotein suggest that benzophenones show an interaction pattern similar to that previously identified for propafenone-type inhibitors.
|
Inhibition of CYP2D6 in human liver microsomes at 1 uM after 20 mins by LC-MS/MS analysis relative to control
|
Homo sapiens
|
25.0
%
|
|
Journal : J. Med. Chem.
Title : Lead optimization of antimalarial propafenone analogues.
Year : 2012
Volume : 55
Issue : 13
First Page : 6087
Last Page : 6093
Authors : Lowes D, Pradhan A, Iyer LV, Parman T, Gow J, Zhu F, Furimsky A, Lemoff A, Guiguemde WA, Sigal M, Clark JA, Wilson E, Tang L, Connelly MC, Derisi JL, Kyle DE, Mirsalis J, Guy RK.
Abstract : Previously reported studies identified analogues of propafenone that had potent antimalarial activity, reduced cardiac ion channel activity, and properties that suggested the potential for clinical development for malaria. Careful examination of the bioavailability, pharmacokinetics, toxicology, and efficacy of this series of compounds using rodent models revealed orally bioavailable compounds that are nontoxic and suppress parasitemia in vivo. Although these compounds possess potential for further preclinical development, they also carry some significant challenges.
|
Inhibition of CYP2D6 in human liver microsomes at 10 uM after 20 mins by LC-MS/MS analysis relative to control
|
Homo sapiens
|
12.0
%
|
|
Journal : J. Med. Chem.
Title : Lead optimization of antimalarial propafenone analogues.
Year : 2012
Volume : 55
Issue : 13
First Page : 6087
Last Page : 6093
Authors : Lowes D, Pradhan A, Iyer LV, Parman T, Gow J, Zhu F, Furimsky A, Lemoff A, Guiguemde WA, Sigal M, Clark JA, Wilson E, Tang L, Connelly MC, Derisi JL, Kyle DE, Mirsalis J, Guy RK.
Abstract : Previously reported studies identified analogues of propafenone that had potent antimalarial activity, reduced cardiac ion channel activity, and properties that suggested the potential for clinical development for malaria. Careful examination of the bioavailability, pharmacokinetics, toxicology, and efficacy of this series of compounds using rodent models revealed orally bioavailable compounds that are nontoxic and suppress parasitemia in vivo. Although these compounds possess potential for further preclinical development, they also carry some significant challenges.
|
SUPPLEMENTARY: Inhibition of P-glycoprotein expressed in MDR CCRF vcr1000 cells by daunorubicin efflux assay. Same assay as CHEMBL914418
|
Homo sapiens
|
331.13
nM
|
|
Title : Structure-activity data for a series of P-glycoprotein inhibitors (Supplementary Data to CHEMBL1142990)
Authors : Ecker GF and Chiba P
Abstract : Supplementary bioactivity data for the University of Vienna publication J. Med. Chem. 2007, 50, 1698-1702 (ChEMBL Doc ID: CHEMBL1142990): pEC50 values for 314 compounds that have been tested for biological activity in the multidrug resistant CCRF-CEM/VCR-1000 inhibition assay (ChEMBL Assay ID: CHEMBL914418) described in reference 33 of the aforementioned publication.
|
Inhibition of hERG K channel
|
None
|
440.0
nM
|
|
Journal : Cardiovasc. Res.
Title : Simulation of multiple ion channel block provides improved early prediction of compounds' clinical torsadogenic risk.
Year : 2011
Volume : 91
First Page : 53
Last Page : 61
Authors : Mirams GR, Cui Y, Sher A, Fink M, Cooper J, Heath BM, McMahon NC, Gavaghan DJ, Noble D.
Abstract : The level of inhibition of the human Ether-à-go-go-related gene (hERG) channel is one of the earliest preclinical markers used to predict the risk of a compound causing Torsade-de-Pointes (TdP) arrhythmias. While avoiding the use of drugs with maximum therapeutic concentrations within 30-fold of their hERG inhibitory concentration 50% (IC(50)) values has been suggested, there are drugs that are exceptions to this rule: hERG inhibitors that do not cause TdP, and drugs that can cause TdP but are not strong hERG inhibitors. In this study, we investigate whether a simulated evaluation of multi-channel effects could be used to improve this early prediction of TdP risk.We collected multiple ion channel data (hERG, Na, L-type Ca) on 31 drugs associated with varied risks of TdP. To integrate the information on multi-channel block, we have performed simulations with a variety of mathematical models of cardiac cells (for rabbit, dog, and human ventricular myocyte models). Drug action is modelled using IC(50) values, and therapeutic drug concentrations to calculate the proportion of blocked channels and the channel conductances are modified accordingly. Various pacing protocols are simulated, and classification analysis is performed to evaluate the predictive power of the models for TdP risk. We find that simulation of action potential duration prolongation, at therapeutic concentrations, provides improved prediction of the TdP risk associated with a compound, above that provided by existing markers.The suggested calculations improve the reliability of early cardiac safety assessments, beyond those based solely on a hERG block effect.
|
Inhibition of GIRK-1/4 channel (unknown origin) expressed in HEK293 cells at 1 uM by automated patch clamp method relative to control
|
Homo sapiens
|
60.6
%
|
|
Journal : J Nat Prod
Title : Diterpenoids from Euphorbia dulcis with Potassium Ion Channel Inhibitory Activity with Selective G Protein-Activated Inwardly Rectifying Ion Channel (GIRK) Blocking Effect.
Year : 2018
Volume : 81
Issue : 11
First Page : 2483
Last Page : 2492
Authors : Kúsz N, Orvos P, Bereczki L, Fertey P, Bombicz P, Csorba A, Tálosi L, Jakab G, Hohmann J, Rédei D.
Abstract : Nine new (1-9) and two known (10, 11) jatrophane diterpenoids were isolated from the methanol extract of Euphorbia dulcis. The structure elucidation of the compounds was performed by means of extensive spectroscopic analysis, including HRESIMS, 1D (1H, JMOD), and 2D (HSQC, HMBC, 1H-1H-COSY, NOESY) NMR experiments. The absolute configuration of compound 1 was determined by single-crystal X-ray diffraction. The electrophysiological effects of compounds 1-11 and the five diterpenoids (12-16) previously isolated from Euphorbia taurinensis were investigated on stable transfected HEK-GIRK1/4 (Kir3.1/3.4) and HEK-hERG (Kv11.1) cell lines using automated patch-clamp equipment. The majority of the diterpenoids showed significant blocking activity on GIRK channels (60.8-88.7% at 10 μM), while compounds 1, 2, 9-11, 13, and 14 exerted notable inhibitory effects even at 1 μM concentration. None of the jatrophane diterpenoids interfered with the function of hERG proteins; however, compound 14 remarkably hampered K+ flow through hERG channels. These selective activities suggest that jatrophane diterpenoids may represent a group of potential lead compounds for the development of novel therapeutic agents against atrial fibrillation.
|
Antibacterial activity against Staphylococcus aureus MRSA ATCC 43300 (CO-ADD:GP_020); MIC in CAMBH media, using NBS plates, by OD(600)
|
Staphylococcus aureus subsp. aureus
|
9.33
%
|
|
|
Antibacterial activity against Escherichia coli ATCC 25922 (CO-ADD:GN_001); MIC in CAMBH media using NBS plates, by OD(600)
|
Escherichia coli
|
8.72
%
|
|
|
Antibacterial activity against Klebsiella pneumoniae MDR ATCC 70063 (CO-ADD:GN_003); MIC in CAMBH media using NBS plates, by OD(600)
|
Klebsiella pneumoniae
|
6.97
%
|
|
|
Antibacterial activity against Pseudomonas aeruginosa ATCC 27853 (CO-ADD:GN_042); MIC in CAMBH media using NBS plates, by OD(600)
|
Pseudomonas aeruginosa
|
13.87
%
|
|
|
Antibacterial activity against Acinetobacter baumannii ATCC 19606 (CO-ADD:GN_034); MIC in CAMBH media using NBS plates, by OD600
|
Acinetobacter baumannii
|
18.62
%
|
|
|
Antifungal activity against Candida albicans ATCC 90028 (CO-ADD:FG_001); MIC in YNB media using NBS plates, by OD630
|
Candida albicans
|
0.01
%
|
|
|
Antifungal activity against Cryptococcus neoformans H99 ATCC 208821 (CO-ADD:FG_002); MIC in YNB media using NBS plates, by Resazurin OD(600-570)
|
Cryptococcus neoformans
|
-5.76
%
|
|
