|
Ability to activate estrogen receptor 1-mediated transcription.
|
None
|
120.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 3-arylbenzoxazines as selective estrogen receptor beta agonists.
Year : 2004
Volume : 14
Issue : 9
First Page : 2327
Last Page : 2330
Authors : Yang W, Wang Y, Ma Z, Golla R, Stouch T, Seethala R, Johnson S, Zhou R, Güngör T, Feyen JH, Dickson JK.
Abstract : A series of 3-aryl-7-hydroxybenzoxazine analogues have been prepared and evaluated as ligands for the two estrogen receptor subtypes (ERalpha and ERbeta). From the radioligand binding assay, compounds with more than a 10-fold binding selectivity toward the ERbeta subtype have been identified. These compounds have also been shown to be potent full agonists in the functional assay by activation of ERE promoted transcription, with the best compound being 20-fold more potent than genistein.
|
Activation of estrogen response element in HeLa cells stably transfected with human Estrogen receptor alpha.
|
None
|
0.7
nM
|
|
Journal : J. Med. Chem.
Title : Toward selective ERbeta agonists for central nervous system disorders: synthesis and characterization of aryl benzthiophenes.
Year : 2002
Volume : 45
Issue : 7
First Page : 1399
Last Page : 1401
Authors : Schopfer U, Schoeffter P, Bischoff SF, Nozulak J, Feuerbach D, Floersheim P.
Abstract : In an effort to identify selective ligands for the estrogen receptor subtype ERbeta, a series of aryl benzthiophenes was synthesized. In a radioligand binding assay and reporter gene assays in HeLa and SH-SY5Y cells, compounds were characterized as ERbeta-selective agonists. By targeting ERbeta in the brain, these compounds could lead to drugs able to separate the beneficial effects of estrogens on mood, learning, and memory from side effects such as the stimulation of endometrial and breast cancer.
|
Inhibition of [3H]17-beta-estradiol binding to human recombinant Estrogen receptor alpha.
|
None
|
480.0
nM
|
|
Journal : J. Med. Chem.
Title : Toward selective ERbeta agonists for central nervous system disorders: synthesis and characterization of aryl benzthiophenes.
Year : 2002
Volume : 45
Issue : 7
First Page : 1399
Last Page : 1401
Authors : Schopfer U, Schoeffter P, Bischoff SF, Nozulak J, Feuerbach D, Floersheim P.
Abstract : In an effort to identify selective ligands for the estrogen receptor subtype ERbeta, a series of aryl benzthiophenes was synthesized. In a radioligand binding assay and reporter gene assays in HeLa and SH-SY5Y cells, compounds were characterized as ERbeta-selective agonists. By targeting ERbeta in the brain, these compounds could lead to drugs able to separate the beneficial effects of estrogens on mood, learning, and memory from side effects such as the stimulation of endometrial and breast cancer.
|
Binding affinity towards estrogen receptor alpha by [3H]17-beta-estradiol displacement.
|
None
|
210.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 3-arylbenzoxazines as selective estrogen receptor beta agonists.
Year : 2004
Volume : 14
Issue : 9
First Page : 2327
Last Page : 2330
Authors : Yang W, Wang Y, Ma Z, Golla R, Stouch T, Seethala R, Johnson S, Zhou R, Güngör T, Feyen JH, Dickson JK.
Abstract : A series of 3-aryl-7-hydroxybenzoxazine analogues have been prepared and evaluated as ligands for the two estrogen receptor subtypes (ERalpha and ERbeta). From the radioligand binding assay, compounds with more than a 10-fold binding selectivity toward the ERbeta subtype have been identified. These compounds have also been shown to be potent full agonists in the functional assay by activation of ERE promoted transcription, with the best compound being 20-fold more potent than genistein.
|
Ability to activate estrogen receptor 2-mediated transcription.
|
None
|
120.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 3-arylbenzoxazines as selective estrogen receptor beta agonists.
Year : 2004
Volume : 14
Issue : 9
First Page : 2327
Last Page : 2330
Authors : Yang W, Wang Y, Ma Z, Golla R, Stouch T, Seethala R, Johnson S, Zhou R, Güngör T, Feyen JH, Dickson JK.
Abstract : A series of 3-aryl-7-hydroxybenzoxazine analogues have been prepared and evaluated as ligands for the two estrogen receptor subtypes (ERalpha and ERbeta). From the radioligand binding assay, compounds with more than a 10-fold binding selectivity toward the ERbeta subtype have been identified. These compounds have also been shown to be potent full agonists in the functional assay by activation of ERE promoted transcription, with the best compound being 20-fold more potent than genistein.
|
Activation of estrogen response element in HeLa cells stably transfected with human Estrogen receptor beta.
|
None
|
2.1
nM
|
|
Journal : J. Med. Chem.
Title : Toward selective ERbeta agonists for central nervous system disorders: synthesis and characterization of aryl benzthiophenes.
Year : 2002
Volume : 45
Issue : 7
First Page : 1399
Last Page : 1401
Authors : Schopfer U, Schoeffter P, Bischoff SF, Nozulak J, Feuerbach D, Floersheim P.
Abstract : In an effort to identify selective ligands for the estrogen receptor subtype ERbeta, a series of aryl benzthiophenes was synthesized. In a radioligand binding assay and reporter gene assays in HeLa and SH-SY5Y cells, compounds were characterized as ERbeta-selective agonists. By targeting ERbeta in the brain, these compounds could lead to drugs able to separate the beneficial effects of estrogens on mood, learning, and memory from side effects such as the stimulation of endometrial and breast cancer.
|
Binding affinity towards estrogen receptor beta by [3H]17-beta-estradiol displacement.
|
None
|
540.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Synthesis and structure-activity relationship of 3-arylbenzoxazines as selective estrogen receptor beta agonists.
Year : 2004
Volume : 14
Issue : 9
First Page : 2327
Last Page : 2330
Authors : Yang W, Wang Y, Ma Z, Golla R, Stouch T, Seethala R, Johnson S, Zhou R, Güngör T, Feyen JH, Dickson JK.
Abstract : A series of 3-aryl-7-hydroxybenzoxazine analogues have been prepared and evaluated as ligands for the two estrogen receptor subtypes (ERalpha and ERbeta). From the radioligand binding assay, compounds with more than a 10-fold binding selectivity toward the ERbeta subtype have been identified. These compounds have also been shown to be potent full agonists in the functional assay by activation of ERE promoted transcription, with the best compound being 20-fold more potent than genistein.
|
Growth response in cultures of MCF-7 (human breast cancer cell line) cells
|
Homo sapiens
|
0.0772
nM
|
|
Journal : J. Med. Chem.
Title : Induction of the estrogen specific mitogenic response of MCF-7 cells by selected analogues of estradiol-17 beta: a 3D QSAR study.
Year : 1997
Volume : 40
Issue : 22
First Page : 3659
Last Page : 3669
Authors : Wiese TE, Polin LA, Palomino E, Brooks SC.
Abstract : Analogues of estradiol-17 beta (E2) have been evaluated for estrogen receptor (ER) binding affinity and mitogenic potential in the human breast cancer cell line MCF-7. These 42 compounds represent subtle modifications of the natural estrogen structure through the placement of hydroxyl, amino, nitro, or iodo groups around the ring system in addition to, or as replacement of, the 3- and 17 beta-hydroxyls of E2. The mitogenic activity of the analogues was found to be related to ER binding only to a limited extent. In order to elucidate structural features that are uniquely responsible for receptor binding affinity or mitogen potential of estrogens, the three-dimensional quantitative structure-activity (QSAR) method Comparative Molecular Field Analysis (CoMFA) was employed. Separate CoMFA models for receptor binding and cell growth stimulation were optimized through the use of various alignment rules and region step size. Whereas the CoMFA contour plots did outline the shared structural requirements for the two measured biological properties, specific topological features in this set of estrogens were delineated that distinguish mitogenic potential from ER binding ability. In particular, steric interference zones which affected growth extend in a band from above the A-ring to position 4 and below, whereas the ER binding steric interference zones are limited to isolated polyhedra in the 1, 2 and 4 positions and the alpha face of the B-ring. In addition, electronegative features located around the A-, B-, or C-rings contribute to receptor affinity. However, growth is dependent only on electronegative and electropositive properties near the 3-position. In a final QSAR model for the mitogenic response, the value of ER binding was included along with structural features as a descriptor in CoMFA. The resulting 3D-QSAR has the most predictive potential of the models in this study and can be considered a prototype model for the general evaluation of a steroidal estrogen's growth stimulating ability in MCF-7 cells. For example, the location of D-ring contours illustrate the model's preference for 17 beta-hydroxy steroids over the less mitogenic 17 alpha- and 16 alpha-hydroxy compounds. In addition, the enhanced mitogenic effect of steric bulk in the 11 alpha-position is also evident. The QSAR studies in this report illustrate the fact that while ER binding may be a required factor of the estrogen dependent growth response in MCF-7 cells, particular structural characteristics, in addition to those responsible for tight receptor binding, must be present to induce an optimal mitogenic response. Therefore, this report demonstrates that the CoMFA QSAR method can be utilized to characterize structural features of test compounds that account for different types of estrogenic responses.
|
Inhibition of 17-beta HSD1 in T47D cells
|
Homo sapiens
|
330.0
nM
|
|
Journal : J. Med. Chem.
Title : Modification of estrone at the 6, 16, and 17 positions: novel potent inhibitors of 17beta-hydroxysteroid dehydrogenase type 1.
Year : 2006
Volume : 49
Issue : 4
First Page : 1325
Last Page : 1345
Authors : Allan GM, Lawrence HR, Cornet J, Bubert C, Fischer DS, Vicker N, Smith A, Tutill HJ, Purohit A, Day JM, Mahon MF, Reed MJ, Potter BV.
Abstract : The 17beta-hydroxysteroid dehydrogenases (17beta-HSDs) catalyze the interconversion between the oxidized and reduced forms of androgens and estrogens at the 17 position. The 17beta-HSD type 1 enzyme (17beta-HSD1) catalyzes the reduction of estrone to estradiol and is expressed in malignant breast cells. Inhibitors of this enzyme thus have potential as treatments for hormone dependent breast cancer. Here we report the syntheses and biological evaluation of novel inhibitors based on the estrone or estradiol template. These have been investigated by modification at the 6, 16 or 17 positions or combinations of these in order to gain information about structure-activity relationships by probing different areas in the enzyme active site. Activity data have been incorporated into a QSAR with predictive power, and the X-ray crystal structures of compounds 15 and 16c have been determined. Compound 15 has an IC50 of 320 nM for 17beta-HSD1 and is selective for 17beta-HSD1 over 17beta-HSD2. Three libraries of amides are also reported that led to the identification of inhibitors 19e and 20a, which have IC50 values of 510 and 380 nM respectively, and 20 h which, having an IC50 value of 37 nM, is the most potent inhibitor of 17beta-HSD1 reported to date. These amides are also selective for 17beta-HSD1 over 17beta-HSD2.
|
Displacement of [3H]estrone from ER beta
|
Homo sapiens
|
31.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and characterization of 3-arylquinazolinone and 3-arylquinazolinethione derivatives as selective estrogen receptor beta modulators.
Year : 2006
Volume : 49
Issue : 8
First Page : 2440
Last Page : 2455
Authors : Güngör T, Chen Y, Golla R, Ma Z, Corte JR, Northrop JP, Bin B, Dickson JK, Stouch T, Zhou R, Johnson SE, Seethala R, Feyen JH.
Abstract : On the basis of the stucture of genistein, a new series of 3-arylquinazolines was prepared and tested for their estrogen receptor (ER) alpha and beta affinities. 5,7-Dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinone (1aa) acts as an agonist on both ER subtypes. It has 62-fold higher binding affinity [IC(50)(ERbeta) = 179 nM] and 38-fold higher functional potency in a transcription assay [EC(50)(ERbeta) = 76 nM] with ERbeta than with ERalpha, thus improving upon the selectivity of genistein. All of the analogues showed preferential binding affinity for ERbeta. Many are also more potent in activating transcription by ERbeta than by ERalpha. Transformation of the C=O functionality at position 4 into a C=S group provided 5,7-dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinethione (1ba), which acts as an agonist on both ER subtypes but has 56-fold higher binding affinity for ERbeta over ERalpha [IC(50)(ERbeta) = 47 nM] and 215-fold higher potency in the transcription assay [EC(50)(ERbeta) = 13 nM]. These ERbeta-selective compounds may represent valuable tools in understanding the differences in structure and biological function of ERbeta and ERalpha.
|
Displacement of [3H]estrone from ER alpha
|
Homo sapiens
|
29.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and characterization of 3-arylquinazolinone and 3-arylquinazolinethione derivatives as selective estrogen receptor beta modulators.
Year : 2006
Volume : 49
Issue : 8
First Page : 2440
Last Page : 2455
Authors : Güngör T, Chen Y, Golla R, Ma Z, Corte JR, Northrop JP, Bin B, Dickson JK, Stouch T, Zhou R, Johnson SE, Seethala R, Feyen JH.
Abstract : On the basis of the stucture of genistein, a new series of 3-arylquinazolines was prepared and tested for their estrogen receptor (ER) alpha and beta affinities. 5,7-Dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinone (1aa) acts as an agonist on both ER subtypes. It has 62-fold higher binding affinity [IC(50)(ERbeta) = 179 nM] and 38-fold higher functional potency in a transcription assay [EC(50)(ERbeta) = 76 nM] with ERbeta than with ERalpha, thus improving upon the selectivity of genistein. All of the analogues showed preferential binding affinity for ERbeta. Many are also more potent in activating transcription by ERbeta than by ERalpha. Transformation of the C=O functionality at position 4 into a C=S group provided 5,7-dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinethione (1ba), which acts as an agonist on both ER subtypes but has 56-fold higher binding affinity for ERbeta over ERalpha [IC(50)(ERbeta) = 47 nM] and 215-fold higher potency in the transcription assay [EC(50)(ERbeta) = 13 nM]. These ERbeta-selective compounds may represent valuable tools in understanding the differences in structure and biological function of ERbeta and ERalpha.
|
Inhibition of ER beta-mediated transactivation of ERE in HeLa cell luciferase assay
|
Homo sapiens
|
26.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and characterization of 3-arylquinazolinone and 3-arylquinazolinethione derivatives as selective estrogen receptor beta modulators.
Year : 2006
Volume : 49
Issue : 8
First Page : 2440
Last Page : 2455
Authors : Güngör T, Chen Y, Golla R, Ma Z, Corte JR, Northrop JP, Bin B, Dickson JK, Stouch T, Zhou R, Johnson SE, Seethala R, Feyen JH.
Abstract : On the basis of the stucture of genistein, a new series of 3-arylquinazolines was prepared and tested for their estrogen receptor (ER) alpha and beta affinities. 5,7-Dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinone (1aa) acts as an agonist on both ER subtypes. It has 62-fold higher binding affinity [IC(50)(ERbeta) = 179 nM] and 38-fold higher functional potency in a transcription assay [EC(50)(ERbeta) = 76 nM] with ERbeta than with ERalpha, thus improving upon the selectivity of genistein. All of the analogues showed preferential binding affinity for ERbeta. Many are also more potent in activating transcription by ERbeta than by ERalpha. Transformation of the C=O functionality at position 4 into a C=S group provided 5,7-dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinethione (1ba), which acts as an agonist on both ER subtypes but has 56-fold higher binding affinity for ERbeta over ERalpha [IC(50)(ERbeta) = 47 nM] and 215-fold higher potency in the transcription assay [EC(50)(ERbeta) = 13 nM]. These ERbeta-selective compounds may represent valuable tools in understanding the differences in structure and biological function of ERbeta and ERalpha.
|
Inhibition of ER beta-mediated transactivation of ERE in HeLa cell luciferase assay at 10 uM
|
Homo sapiens
|
166.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and characterization of 3-arylquinazolinone and 3-arylquinazolinethione derivatives as selective estrogen receptor beta modulators.
Year : 2006
Volume : 49
Issue : 8
First Page : 2440
Last Page : 2455
Authors : Güngör T, Chen Y, Golla R, Ma Z, Corte JR, Northrop JP, Bin B, Dickson JK, Stouch T, Zhou R, Johnson SE, Seethala R, Feyen JH.
Abstract : On the basis of the stucture of genistein, a new series of 3-arylquinazolines was prepared and tested for their estrogen receptor (ER) alpha and beta affinities. 5,7-Dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinone (1aa) acts as an agonist on both ER subtypes. It has 62-fold higher binding affinity [IC(50)(ERbeta) = 179 nM] and 38-fold higher functional potency in a transcription assay [EC(50)(ERbeta) = 76 nM] with ERbeta than with ERalpha, thus improving upon the selectivity of genistein. All of the analogues showed preferential binding affinity for ERbeta. Many are also more potent in activating transcription by ERbeta than by ERalpha. Transformation of the C=O functionality at position 4 into a C=S group provided 5,7-dihydroxy-3-(4-hydroxyphenyl)-4(3H)-quinazolinethione (1ba), which acts as an agonist on both ER subtypes but has 56-fold higher binding affinity for ERbeta over ERalpha [IC(50)(ERbeta) = 47 nM] and 215-fold higher potency in the transcription assay [EC(50)(ERbeta) = 13 nM]. These ERbeta-selective compounds may represent valuable tools in understanding the differences in structure and biological function of ERbeta and ERalpha.
|
Inhibition of 17beta-HSD1 overexpressed in homogenated HEK293 cells at 1 uM
|
None
|
59.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in homogenated HEK293 cells at 0.1 uM
|
None
|
19.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact HEK293 cells at 10 uM
|
None
|
83.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact HEK293 cells at 1 uM
|
None
|
38.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact HEK293 cells at 0.1 uM
|
None
|
8.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact T47D cells at 10 uM
|
None
|
93.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact T47D cells at 1 uM
|
None
|
85.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD1 over-expressed in intact T47D cells at 0.1 uM
|
None
|
36.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD7 over-expressed in intact HEK293 cells at 10 uM
|
Homo sapiens
|
0.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD7 over-expressed in intact HEK293 cells at 1 uM
|
Homo sapiens
|
0.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD12 over-expressed in intact HEK293 cells at 10 uM
|
Homo sapiens
|
0.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Inhibition of 17beta-HSD12 over-expressed in intact HEK293 cells at 1 uM
|
Homo sapiens
|
0.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : C6-(N,N-butyl-methyl-heptanamide) derivatives of estrone and estradiol as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: Chemical synthesis and biological evaluation.
Year : 2007
Volume : 15
Issue : 2
First Page : 714
Last Page : 726
Authors : Cadot C, Laplante Y, Kamal F, Luu-The V, Poirier D.
Abstract : A series of estrone and estradiol derivatives having an N-butyl,methyl heptanamide side chain at C6-position were synthesized, tested as inhibitors of type 1 17beta-HSD and assessed for their possible estrogenic activity. A better type 1 17beta-HSD inhibition was obtained for the 6beta-side chain orientation over 6alpha; the C17-alcohols are more potent inhibitors than the corresponding ketones; introducing a 2-methoxy group decreased the inhibitory potency; and the replacement of a C-S bond by a C-C bond in the C6beta-side chain is not detrimental to inhibition. Interestingly, the new inhibitors were also found less estrogenic than the lead compound in two breast cancer cell lines, T-47D and MCF-7.
|
Displacement of [3H]5alpha dihydrotestosterone from human sex hormone binding globulin
|
Homo sapiens
|
6.607
nM
|
|
Journal : J. Med. Chem.
Title : An updated steroid benchmark set and its application in the discovery of novel nanomolar ligands of sex hormone-binding globulin.
Year : 2008
Volume : 51
Issue : 7
First Page : 2047
Last Page : 2056
Authors : Cherkasov A, Ban F, Santos-Filho O, Thorsteinson N, Fallahi M, Hammond GL.
Abstract : A benchmark data set of steroids with known affinity for sex hormone-binding globulin (SHBG) has been widely used to validate popular molecular field-based QSAR techniques. We have expanded the data set by adding a number of nonsteroidal SHBG ligands identified both from the literature and in our previous experimental studies. This updated molecular set has been used herein to develop 4D QSAR models based on "inductive" descriptors and to gain insight into the molecular basis of protein-ligand interactions. Molecular alignment was generated by means of docking active compounds into the active site of the SHBG. Surprisingly, the alignment of the benchmark steroids contradicted the classical ligand-based alignment utilized in previous CoMFA and CoMSIA models yet afforded models with higher statistical significance and predictive power. The resulting QSAR models combined with CoMFA and CoMSiA models as well as structure-based virtual screening allowed discovering several low-micromolar to nanomolar nonsteroidal inhibitors for human SHBG.
|
Inhibition of 17beta-HSD1 in human T47D cells assessed as inhibition of transformation of [14C]-estrone into [14C]estrogen at 0.1 uM after 24 hrs
|
Homo sapiens
|
37.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : Estradiol and estrone C-16 derivatives as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: blocking of ER+ breast cancer cell proliferation induced by estrone.
Year : 2008
Volume : 16
Issue : 4
First Page : 1849
Last Page : 1860
Authors : Laplante Y, Cadot C, Fournier MA, Poirier D.
Abstract : Estrogens play an important role in the development of breast cancer. Inhibiting 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1)--the enzyme responsible for the last step in the biosynthesis of the most potent estrogen, estradiol (E2)--would thus allow hindering the growth of estrogen-sensitive tumors. Based on a previous study identifying 16beta-benzyl-E2 (1) as a lead compound for developing inhibitors of the transformation of estrone (E1) into E2, we modified the benzyl group of 1 to improve its inhibitory activity. Three strategies were also devised to produce compounds with less residual estrogenic activity: (1) replacing the hydroxy group by a hydrogen at position 3 (C3); (2) adding a methoxy at C2; and (3) adding an alkylamide chain known to be antiestrogenic at C7. In order to test the inhibitory potency of the new compounds, we used the human breast cancer cell line T-47D, which exerts a strong endogenous 17beta-HSD1 activity. In this intact cell model, 16beta-m-carbamoylbenzyl-E2 (4m) emerged as a potent inhibitor of 17beta-HSD1 with an IC50 value of 44 nM for the transformation of [14C]-E1 (60 nM) into [14C]-E2 (24-h incubation). In another assay aimed at assessing the unwanted estrogenic activity, a 10-day treatment with 4m at a concentration of 0.5 microM induced some proliferation (38%) of T-47D estrogen-sensitive (ER+) breast cancer cells. Interestingly, when 4m (0.5 microM) was given with E1 (0.1 nM) in a 10-day treatment, it blocked 62% of the T-47D cell proliferation induced by E1 after its reduction to E2 by 17beta-HSD1. Thus, in addition to generating useful structure-activity relationships for the development of 17beta-HSD1 inhibitors, our study demonstrates that using such inhibitors is a valuable strategy for reducing the level of E2 and consequently its proliferative effect in T-47D ER+ breast cancer cells.
|
Inhibition of 17beta-HSD1 in human T47D cells assessed as inhibition of transformation of [14C]-estrone into [14C]-estrogen at 1 uM after 24 hrs
|
Homo sapiens
|
85.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : Estradiol and estrone C-16 derivatives as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: blocking of ER+ breast cancer cell proliferation induced by estrone.
Year : 2008
Volume : 16
Issue : 4
First Page : 1849
Last Page : 1860
Authors : Laplante Y, Cadot C, Fournier MA, Poirier D.
Abstract : Estrogens play an important role in the development of breast cancer. Inhibiting 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1)--the enzyme responsible for the last step in the biosynthesis of the most potent estrogen, estradiol (E2)--would thus allow hindering the growth of estrogen-sensitive tumors. Based on a previous study identifying 16beta-benzyl-E2 (1) as a lead compound for developing inhibitors of the transformation of estrone (E1) into E2, we modified the benzyl group of 1 to improve its inhibitory activity. Three strategies were also devised to produce compounds with less residual estrogenic activity: (1) replacing the hydroxy group by a hydrogen at position 3 (C3); (2) adding a methoxy at C2; and (3) adding an alkylamide chain known to be antiestrogenic at C7. In order to test the inhibitory potency of the new compounds, we used the human breast cancer cell line T-47D, which exerts a strong endogenous 17beta-HSD1 activity. In this intact cell model, 16beta-m-carbamoylbenzyl-E2 (4m) emerged as a potent inhibitor of 17beta-HSD1 with an IC50 value of 44 nM for the transformation of [14C]-E1 (60 nM) into [14C]-E2 (24-h incubation). In another assay aimed at assessing the unwanted estrogenic activity, a 10-day treatment with 4m at a concentration of 0.5 microM induced some proliferation (38%) of T-47D estrogen-sensitive (ER+) breast cancer cells. Interestingly, when 4m (0.5 microM) was given with E1 (0.1 nM) in a 10-day treatment, it blocked 62% of the T-47D cell proliferation induced by E1 after its reduction to E2 by 17beta-HSD1. Thus, in addition to generating useful structure-activity relationships for the development of 17beta-HSD1 inhibitors, our study demonstrates that using such inhibitors is a valuable strategy for reducing the level of E2 and consequently its proliferative effect in T-47D ER+ breast cancer cells.
|
Inhibition of 17beta-HSD1 in human T47D cells assessed as inhibition of transformation of [14C]-estrone into [14C]estrogen at 10 uM after 24 hrs
|
Homo sapiens
|
94.0
%
|
|
Journal : Bioorg. Med. Chem.
Title : Estradiol and estrone C-16 derivatives as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: blocking of ER+ breast cancer cell proliferation induced by estrone.
Year : 2008
Volume : 16
Issue : 4
First Page : 1849
Last Page : 1860
Authors : Laplante Y, Cadot C, Fournier MA, Poirier D.
Abstract : Estrogens play an important role in the development of breast cancer. Inhibiting 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1)--the enzyme responsible for the last step in the biosynthesis of the most potent estrogen, estradiol (E2)--would thus allow hindering the growth of estrogen-sensitive tumors. Based on a previous study identifying 16beta-benzyl-E2 (1) as a lead compound for developing inhibitors of the transformation of estrone (E1) into E2, we modified the benzyl group of 1 to improve its inhibitory activity. Three strategies were also devised to produce compounds with less residual estrogenic activity: (1) replacing the hydroxy group by a hydrogen at position 3 (C3); (2) adding a methoxy at C2; and (3) adding an alkylamide chain known to be antiestrogenic at C7. In order to test the inhibitory potency of the new compounds, we used the human breast cancer cell line T-47D, which exerts a strong endogenous 17beta-HSD1 activity. In this intact cell model, 16beta-m-carbamoylbenzyl-E2 (4m) emerged as a potent inhibitor of 17beta-HSD1 with an IC50 value of 44 nM for the transformation of [14C]-E1 (60 nM) into [14C]-E2 (24-h incubation). In another assay aimed at assessing the unwanted estrogenic activity, a 10-day treatment with 4m at a concentration of 0.5 microM induced some proliferation (38%) of T-47D estrogen-sensitive (ER+) breast cancer cells. Interestingly, when 4m (0.5 microM) was given with E1 (0.1 nM) in a 10-day treatment, it blocked 62% of the T-47D cell proliferation induced by E1 after its reduction to E2 by 17beta-HSD1. Thus, in addition to generating useful structure-activity relationships for the development of 17beta-HSD1 inhibitors, our study demonstrates that using such inhibitors is a valuable strategy for reducing the level of E2 and consequently its proliferative effect in T-47D ER+ breast cancer cells.
|
Inhibition of 17beta-HSD1 in human T47D cells assessed as inhibition of transformation of [14C]-estrone into [14C]estrogen
|
Homo sapiens
|
218.0
nM
|
|
Journal : Bioorg. Med. Chem.
Title : Estradiol and estrone C-16 derivatives as inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: blocking of ER+ breast cancer cell proliferation induced by estrone.
Year : 2008
Volume : 16
Issue : 4
First Page : 1849
Last Page : 1860
Authors : Laplante Y, Cadot C, Fournier MA, Poirier D.
Abstract : Estrogens play an important role in the development of breast cancer. Inhibiting 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1)--the enzyme responsible for the last step in the biosynthesis of the most potent estrogen, estradiol (E2)--would thus allow hindering the growth of estrogen-sensitive tumors. Based on a previous study identifying 16beta-benzyl-E2 (1) as a lead compound for developing inhibitors of the transformation of estrone (E1) into E2, we modified the benzyl group of 1 to improve its inhibitory activity. Three strategies were also devised to produce compounds with less residual estrogenic activity: (1) replacing the hydroxy group by a hydrogen at position 3 (C3); (2) adding a methoxy at C2; and (3) adding an alkylamide chain known to be antiestrogenic at C7. In order to test the inhibitory potency of the new compounds, we used the human breast cancer cell line T-47D, which exerts a strong endogenous 17beta-HSD1 activity. In this intact cell model, 16beta-m-carbamoylbenzyl-E2 (4m) emerged as a potent inhibitor of 17beta-HSD1 with an IC50 value of 44 nM for the transformation of [14C]-E1 (60 nM) into [14C]-E2 (24-h incubation). In another assay aimed at assessing the unwanted estrogenic activity, a 10-day treatment with 4m at a concentration of 0.5 microM induced some proliferation (38%) of T-47D estrogen-sensitive (ER+) breast cancer cells. Interestingly, when 4m (0.5 microM) was given with E1 (0.1 nM) in a 10-day treatment, it blocked 62% of the T-47D cell proliferation induced by E1 after its reduction to E2 by 17beta-HSD1. Thus, in addition to generating useful structure-activity relationships for the development of 17beta-HSD1 inhibitors, our study demonstrates that using such inhibitors is a valuable strategy for reducing the level of E2 and consequently its proliferative effect in T-47D ER+ breast cancer cells.
|
Inhibition of 17beta-HSD1 assessed as conversion of [14C]estradiol to [14C]estrone using NADP+
|
None
|
3.0
nM
|
|
Journal : Eur. J. Med. Chem.
Title : Design and synthesis of bisubstrate inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: overview and perspectives.
Year : 2008
Volume : 43
Issue : 11
First Page : 2298
Last Page : 2306
Authors : Fournier D, Poirier D, Mazumdar M, Lin SX.
Abstract : Type 1 17beta-hydroxysteroid dehydrogenase (17beta-HSD1) is a key steroidogenic enzyme that catalyses the reduction of steroid estrone into the most potent endogenous estrogen estradiol using the cofactor NAD(P)H. Bisubstrate inhibition is a good way to enhance the potency of inhibitors of cofactor-assisted enzymes. The design of a bisubstrate inhibitor of 17beta-HSD1, the estradiol/adenosine hybrid EM-1745, is reviewed and strategies for future designs of inhibitors are proposed.
|
Inhibition of 17beta-HSD1 expressed in HEK 293 cells assessed as conversion of [14C]estrone to [14C]estradiol using NADH
|
None
|
810.0
nM
|
|
Journal : Eur. J. Med. Chem.
Title : Design and synthesis of bisubstrate inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: overview and perspectives.
Year : 2008
Volume : 43
Issue : 11
First Page : 2298
Last Page : 2306
Authors : Fournier D, Poirier D, Mazumdar M, Lin SX.
Abstract : Type 1 17beta-hydroxysteroid dehydrogenase (17beta-HSD1) is a key steroidogenic enzyme that catalyses the reduction of steroid estrone into the most potent endogenous estrogen estradiol using the cofactor NAD(P)H. Bisubstrate inhibition is a good way to enhance the potency of inhibitors of cofactor-assisted enzymes. The design of a bisubstrate inhibitor of 17beta-HSD1, the estradiol/adenosine hybrid EM-1745, is reviewed and strategies for future designs of inhibitors are proposed.
|
Inhibition of 17beta-HSD1 expressed in HEK 293 cells assessed as conversion of [14C]estrone to [14C]estradiol
|
None
|
600.0
nM
|
|
Journal : Eur. J. Med. Chem.
Title : Design and synthesis of bisubstrate inhibitors of type 1 17beta-hydroxysteroid dehydrogenase: overview and perspectives.
Year : 2008
Volume : 43
Issue : 11
First Page : 2298
Last Page : 2306
Authors : Fournier D, Poirier D, Mazumdar M, Lin SX.
Abstract : Type 1 17beta-hydroxysteroid dehydrogenase (17beta-HSD1) is a key steroidogenic enzyme that catalyses the reduction of steroid estrone into the most potent endogenous estrogen estradiol using the cofactor NAD(P)H. Bisubstrate inhibition is a good way to enhance the potency of inhibitors of cofactor-assisted enzymes. The design of a bisubstrate inhibitor of 17beta-HSD1, the estradiol/adenosine hybrid EM-1745, is reviewed and strategies for future designs of inhibitors are proposed.
|
Activity at human recombinant ERalpha by fluorescence polarization assay
|
Homo sapiens
|
7.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and biological evaluation of 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1) inhibitors based on a thieno[2,3-d]pyrimidin-4(3H)-one core.
Year : 2009
Volume : 52
Issue : 21
First Page : 6660
Last Page : 6671
Authors : Lilienkampf A, Karkola S, Alho-Richmond S, Koskimies P, Johansson N, Huhtinen K, Vihko K, Wähälä K.
Abstract : Many breast tumors are hormone-dependent, and estrogens, especially estradiol (E2), have a pivotal role in their growth and development. 17beta-Hydroxysteroid dehydrogenase type 1 (17beta-HSD1) is a key enzyme in the biosynthesis of female sex steroids, catalyzing the NADPH-dependent reduction of estrone into biologically active estradiol. In this study, a library of fused (di)cycloalkeno thieno[2,3-d]pyrimidin-4(3H)-one based compounds was synthesized, and the biological activities against 17beta-HSD1 in a cell-free and in a cell-based assay were evaluated. Several thieno[2,3-d]pyrimidin-4(3H)-one based compounds, at 0.1 and 1 muM test concentrations, were found to be potent 17beta-HSD1 inhibitors. For example, 4-(3-hydroxyphenylthio)-1,2,7,8,9,10,11,13-octahydro-13-oxo-[1]benzothieno[2',3':4,5]-pyrimido[1,2-a]azepine-3-carboxaldehyde (7f) is one of the most potent nonsteroidal 17beta-HSD1 inhibitors reported to date with 94% inhibition of the recombinant enzyme at 0.1 muM test concentration. Importantly, the majority of these compounds exhibited excellent selectivity over the oxidative isoform 17beta-HSD2 and lacked estrogenic effects in an estrogen receptor (ER) binding assay.
|
Activity at human recombinant ERbeta by fluorescence polarization assay
|
Homo sapiens
|
8.0
nM
|
|
Journal : J. Med. Chem.
Title : Synthesis and biological evaluation of 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD1) inhibitors based on a thieno[2,3-d]pyrimidin-4(3H)-one core.
Year : 2009
Volume : 52
Issue : 21
First Page : 6660
Last Page : 6671
Authors : Lilienkampf A, Karkola S, Alho-Richmond S, Koskimies P, Johansson N, Huhtinen K, Vihko K, Wähälä K.
Abstract : Many breast tumors are hormone-dependent, and estrogens, especially estradiol (E2), have a pivotal role in their growth and development. 17beta-Hydroxysteroid dehydrogenase type 1 (17beta-HSD1) is a key enzyme in the biosynthesis of female sex steroids, catalyzing the NADPH-dependent reduction of estrone into biologically active estradiol. In this study, a library of fused (di)cycloalkeno thieno[2,3-d]pyrimidin-4(3H)-one based compounds was synthesized, and the biological activities against 17beta-HSD1 in a cell-free and in a cell-based assay were evaluated. Several thieno[2,3-d]pyrimidin-4(3H)-one based compounds, at 0.1 and 1 muM test concentrations, were found to be potent 17beta-HSD1 inhibitors. For example, 4-(3-hydroxyphenylthio)-1,2,7,8,9,10,11,13-octahydro-13-oxo-[1]benzothieno[2',3':4,5]-pyrimido[1,2-a]azepine-3-carboxaldehyde (7f) is one of the most potent nonsteroidal 17beta-HSD1 inhibitors reported to date with 94% inhibition of the recombinant enzyme at 0.1 muM test concentration. Importantly, the majority of these compounds exhibited excellent selectivity over the oxidative isoform 17beta-HSD2 and lacked estrogenic effects in an estrogen receptor (ER) binding assay.
|
Inhibition of His-tagged human 17beta-HSD1 expressed in Escherichia coli by scintillation counting
|
Homo sapiens
|
109.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Structure-based design, synthesis and in vitro characterization of potent 17beta-hydroxysteroid dehydrogenase type 1 inhibitors based on 2-substitutions of estrone and D-homo-estrone.
Year : 2009
Volume : 19
Issue : 23
First Page : 6740
Last Page : 6744
Authors : Möller G, Deluca D, Gege C, Rosinus A, Kowalik D, Peters O, Droescher P, Elger W, Adamski J, Hillisch A.
Abstract : In search for specific drugs against steroid-dependent cancers we have developed a novel set of potent inhibitors of steroidogenic human 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD 1). The X-ray structure of 17beta-HSD 1 in complex with estradiol served as basis for the design of the inhibitors. 2-Substituted estrone and D-homo-estrone derivatives were synthesized and tested for 17beta-HSD 1 inhibition. The best 17beta-HSD 1 inhibitor, 2-phenethyl-D-homo-estrone, revealed an IC(50) of 15 nM in vitro. The inhibitory potency of compounds is comparable or better to that of previously described inhibitors. An interaction within the cofactor binding site is not necessary to obtain this high binding affinity for substances developed.
|
Displacement of [3H]17beta-estradiol from human ERalpha expressed in SF9 cells
|
Homo sapiens
|
96.0
nM
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Structure-based design, synthesis and in vitro characterization of potent 17beta-hydroxysteroid dehydrogenase type 1 inhibitors based on 2-substitutions of estrone and D-homo-estrone.
Year : 2009
Volume : 19
Issue : 23
First Page : 6740
Last Page : 6744
Authors : Möller G, Deluca D, Gege C, Rosinus A, Kowalik D, Peters O, Droescher P, Elger W, Adamski J, Hillisch A.
Abstract : In search for specific drugs against steroid-dependent cancers we have developed a novel set of potent inhibitors of steroidogenic human 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD 1). The X-ray structure of 17beta-HSD 1 in complex with estradiol served as basis for the design of the inhibitors. 2-Substituted estrone and D-homo-estrone derivatives were synthesized and tested for 17beta-HSD 1 inhibition. The best 17beta-HSD 1 inhibitor, 2-phenethyl-D-homo-estrone, revealed an IC(50) of 15 nM in vitro. The inhibitory potency of compounds is comparable or better to that of previously described inhibitors. An interaction within the cofactor binding site is not necessary to obtain this high binding affinity for substances developed.
|
Inhibition of His-tagged human 17beta-HSD1 expressed in Escherichia coli at 2 uM by scintillation counting
|
Homo sapiens
|
90.0
%
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : Structure-based design, synthesis and in vitro characterization of potent 17beta-hydroxysteroid dehydrogenase type 1 inhibitors based on 2-substitutions of estrone and D-homo-estrone.
Year : 2009
Volume : 19
Issue : 23
First Page : 6740
Last Page : 6744
Authors : Möller G, Deluca D, Gege C, Rosinus A, Kowalik D, Peters O, Droescher P, Elger W, Adamski J, Hillisch A.
Abstract : In search for specific drugs against steroid-dependent cancers we have developed a novel set of potent inhibitors of steroidogenic human 17beta-hydroxysteroid dehydrogenase type 1 (17beta-HSD 1). The X-ray structure of 17beta-HSD 1 in complex with estradiol served as basis for the design of the inhibitors. 2-Substituted estrone and D-homo-estrone derivatives were synthesized and tested for 17beta-HSD 1 inhibition. The best 17beta-HSD 1 inhibitor, 2-phenethyl-D-homo-estrone, revealed an IC(50) of 15 nM in vitro. The inhibitory potency of compounds is comparable or better to that of previously described inhibitors. An interaction within the cofactor binding site is not necessary to obtain this high binding affinity for substances developed.
|
Inhibition of human 17beta-HSD7 expressed in HEK293 cells assessed as inhibition of reduction of [14C]estrone into [14C]estradiol at 3 uM after 7 hrs
|
Homo sapiens
|
10.1
%
|
|
Journal : J. Med. Chem.
Title : Potent and selective steroidal inhibitors of 17beta-hydroxysteroid dehydrogenase type 7, an enzyme that catalyzes the reduction of the key hormones estrone and dihydrotestosterone.
Year : 2009
Volume : 52
Issue : 23
First Page : 7488
Last Page : 7502
Authors : Bellavance E, Luu-The V, Poirier D.
Abstract : 17beta-Hydroxysteroid dehydrogenase type 7 (17beta-HSD7) catalyzes the reduction of estrone (E(1)) into estradiol (E(2)) and of dihydrotestosterone (DHT) into 5alpha-androstane-3beta,17beta-diol (3beta-diol), therefore modulating the level of mitogenic estrogens and androgens in humans. By classical and parallel chemistry, we generated several 4-methyl-4-aza-5alpha-androstane derivatives differing in their C-17 substituent: 17beta-formamide, 17beta-benzamide, and 17beta-tertiary amine. Best candidates in each category had demonstrated good inhibitory potency toward the conversion of E(1) into E(2) (IC(50) = 189-451 nM) and also toward the conversion of DHT into 3beta-diol (69-91% at 3 microM). Inhibition assays with 17beta-HSD1, 17beta-HSD5, 5alpha-reductase (5alpha-R) 1 and 5alpha-R2 revealed that 17beta-HSD7 inhibitors with a 4-methyl-4-aza nucleus were also able to inhibit 5alpha-Rs but not the other enzymes tested. Two 4-aza-5alpha-androstane inhibitors were, however, selective and still showed good inhibition of 17beta-HSD7. First selective and efficient inhibitors of 17beta-HSD7 are now available for additional mechanistic and therapeutic studies.
|
DRUGMATRIX: Estrogen ERalpha radioligand binding (ligand: [3H] Estradiol)
|
None
|
7.647
nM
|
|
DRUGMATRIX: Estrogen ERalpha radioligand binding (ligand: [3H] Estradiol)
|
None
|
2.185
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
|
Inhibition of sodium fluorescein uptake in OATP1B1-transfected CHO cells at an equimolar substrate-inhibitor concentration of 10 uM
|
Cricetulus griseus
|
280.11
%
|
|
Journal : Mol. Pharmacol.
Title : Structure-based identification of OATP1B1/3 inhibitors.
Year : 2013
Volume : 83
Issue : 6
First Page : 1257
Last Page : 1267
Authors : De Bruyn T, van Westen GJ, Ijzerman AP, Stieger B, de Witte P, Augustijns PF, Annaert PP.
Abstract : Several recent studies show that inhibition of the hepatic transport proteins organic anion-transporting polypeptide 1B1 (OATP1B1) and 1B3 (OATP1B3) can result in clinically relevant drug-drug interactions (DDI). To avoid late-stage development drug failures due to OATP1B-mediated DDI, predictive in vitro and in silico methods should be implemented at an early stage of the drug candidate evaluation process. In the present study, we first developed a high-throughput in vitro transporter inhibition assay for the OATP1B subfamily. A total of 2000 compounds were tested as potential modulators of the uptake of the OATP1B substrate sodium fluorescein, in OATP1B1- or 1B3-transfected Chinese hamster ovary cells. At an equimolar substrate-inhibitor concentration of 10 µM, 212 and 139 molecules were identified as OATP1B1 and OATP1B3 inhibitors, respectively (minimum 50% inhibition). For 69 compounds, previously not identified as OATP1B inhibitors, concentration-dependent inhibition was also determined, yielding Ki values ranging from 0.06 to 6.5 µM. Based on these in vitro data, we subsequently developed a proteochemometrics-based in silico model, which predicted OATP1B inhibitors in the test group (20% of the dataset) with high specificity (86%) and sensitivity (78%). Moreover, several physicochemical compound properties and substructures related to OATP1B1/1B3 inhibition or inactivity were identified. Finally, model performance was prospectively verified with a set of 54 compounds not included in the original dataset. This validation indicated that 80 and 74% of the compounds were correctly classified for OATP1B1 and OATP1B3 inhibition, respectively.
|
Inhibition of sodium fluorescein uptake in OATP1B3-transfected CHO cells at an equimolar substrate-inhibitor concentration of 10 uM
|
Cricetulus griseus
|
109.27
%
|
|
Journal : Mol. Pharmacol.
Title : Structure-based identification of OATP1B1/3 inhibitors.
Year : 2013
Volume : 83
Issue : 6
First Page : 1257
Last Page : 1267
Authors : De Bruyn T, van Westen GJ, Ijzerman AP, Stieger B, de Witte P, Augustijns PF, Annaert PP.
Abstract : Several recent studies show that inhibition of the hepatic transport proteins organic anion-transporting polypeptide 1B1 (OATP1B1) and 1B3 (OATP1B3) can result in clinically relevant drug-drug interactions (DDI). To avoid late-stage development drug failures due to OATP1B-mediated DDI, predictive in vitro and in silico methods should be implemented at an early stage of the drug candidate evaluation process. In the present study, we first developed a high-throughput in vitro transporter inhibition assay for the OATP1B subfamily. A total of 2000 compounds were tested as potential modulators of the uptake of the OATP1B substrate sodium fluorescein, in OATP1B1- or 1B3-transfected Chinese hamster ovary cells. At an equimolar substrate-inhibitor concentration of 10 µM, 212 and 139 molecules were identified as OATP1B1 and OATP1B3 inhibitors, respectively (minimum 50% inhibition). For 69 compounds, previously not identified as OATP1B inhibitors, concentration-dependent inhibition was also determined, yielding Ki values ranging from 0.06 to 6.5 µM. Based on these in vitro data, we subsequently developed a proteochemometrics-based in silico model, which predicted OATP1B inhibitors in the test group (20% of the dataset) with high specificity (86%) and sensitivity (78%). Moreover, several physicochemical compound properties and substructures related to OATP1B1/1B3 inhibition or inactivity were identified. Finally, model performance was prospectively verified with a set of 54 compounds not included in the original dataset. This validation indicated that 80 and 74% of the compounds were correctly classified for OATP1B1 and OATP1B3 inhibition, respectively.
|
Inhibition of VGLUT in rat brain assessed as [3H]-L-Glu uptake into synaptic vesicles at 250 uM relative to control
|
Rattus norvegicus
|
98.0
%
|
|
Journal : Bioorg. Med. Chem. Lett.
Title : The development of benzo- and naphtho-fused quinoline-2,4-dicarboxylic acids as vesicular glutamate transporter (VGLUT) inhibitors reveals a possible role for neuroactive steroids.
Year : 2014
Volume : 24
Issue : 3
First Page : 850
Last Page : 854
Authors : Carrigan CN, Patel SA, Cox HD, Bolstad ES, Gerdes JM, Smith WE, Bridges RJ, Thompson CM.
Abstract : Substituted quinoline-2,4-dicarboxylates (QDCs) are conformationally-restricted mimics of glutamate that were previously reported to selectively block the glutamate vesicular transporters (VGLUTs). We find that expanding the QDC scaffold to benzoquinoline dicarboxylic acids (BQDC) and naphthoquinoline dicarboxylic acids (NQDCs) improves inhibitory activity with the NQDCs showing IC50∼70 μM. Modeling overlay studies showed that the polycyclic QDCs resembled steroid structures and led to the identification and testing of estrone sulfate, pregnenolone sulfate and pregnanolone sulfate that blocked the uptake of l-Glu by 50%, 70% and 85% of control, respectively. Pregnanolone sulfate was further characterized by kinetic pharmacological determinations that demonstrated competitive inhibition and a Ki of ≈20 μM.
|
Inhibition of recombinant human CYP1B1 expressed in bacterial microsomes co-expressing P450 reductase at 3 uM using 7-ethyl-O-resorufin as substrate after 45 mins in presence of NADPH by fluorescence assay relative to control
|
Homo sapiens
|
40.0
%
|
|
Journal : Bioorg Med Chem Lett
Title : Targeting cytochrome P450 (CYP) 1B1 with steroid derivatives.
Year : 2016
Volume : 26
Issue : 21
First Page : 5272
Last Page : 5276
Authors : Poirier D, Roy J, Cortés-Benítez F, Dutour R.
Abstract : Inhibition of cytochrome P450 1B1 (CYP1B1) represents a promising therapeutic strategy, because it would enable action at three different levels: (1) by inhibiting the formation of mutagenic 4-hydroxy-estradiol, (2) by inhibiting the bioactivation of procarcinogens, and (3) by reducing drug-resistance. Surprisingly, few steroids were reported as inhibitors of CYP1B1. From a screening performed with 90 steroid derivatives, we identified thioestrone (B19) as an inhibitor (IC50=3.4μM) of CYP1B1. Molecular modeling studies showed that the 3-SH group of B19 is closer (3.36Å) to the iron atom of the heme system than the 3-OH group of enzyme substrates estrone and estradiol (4.26Å and 3.58Å, respectively). B19 also produced a better docking GOLD score that correlated with the inhibitory results obtained. The estrane derivative B19 represents an interesting lead compound that can be easily modified to extend the structure-activity relationship study and to provide a next generation of more powerful CYP1B1 inhibitors.
|
Inhibition of recombinant human CYP1B1 expressed in supersomes coexpressing P450 reductase at 0.3 uM using 7-ethyl-O-resorufin as substrate after 45 mins in presence of NADPH by fluorescence assay relative to control
|
Homo sapiens
|
16.0
%
|
|
Journal : ACS Med Chem Lett
Title : Structure-Based Design and Synthesis of New Estrane-Pyridine Derivatives as Cytochrome P450 (CYP) 1B1 Inhibitors.
Year : 2017
Volume : 8
Issue : 11
First Page : 1159
Last Page : 1164
Authors : Dutour R, Cortés-Benítez F, Roy J, Poirier D.
Abstract : Inhibition of cytochrome P450 (CYP) 1B1 is a promising therapeutic strategy, as such an inhibitor could modulate the bioactivation of procarcinogens while reducing drug resistance. Based on docking studies, the synthesis of 12 estra-1,3,5(10)-triene derivatives containing a pyridin-3-/4-yl moiety at position C2, C3, or C4 was performed, and we measured their inhibitory activity on CYP1B1 using the ethoxyresorufin-O-deethylase (EROD) assay. The position of the nitrogen atom in the aromatic ring has little influence on their inhibition potency, but compounds with a pyridinyl at C2 of the steroid nucleus are more potent CYP1B1 inhibitors than those with a pyridinyl at C3 or C4. Estradiol derivatives (OH at C17β) are also 10-fold more potent inhibitors than estrone derivatives (carbonyl at C17). Thus, 2-(pyridin-3-yl)-estradiol (4a) is the best CYP1B1 inhibitor (IC50 = 0.011 μM) from this series of compounds, and the best steroid inhibitor reported until now. It is also 7.5-fold more potent than the well-known nonsteroidal CYP1B1 inhibitor α-naphthoflavone (IC50 = 0.083 μM).
|
Antiviral activity determined as inhibition of SARS-CoV-2 induced cytotoxicity of Caco-2 cells at 10 uM after 48 hours by high content imaging
|
Homo sapiens
|
3.39
%
|
|
Title : Identification of inhibitors of SARS-CoV-2 in-vitro cellular toxicity in human (Caco-2) cells using a large scale drug repurposing collection
Year : 2020
Authors : Bernhard Ellinger, Denisa Bojkova, Andrea Zaliani, Jindrich Cinatl, Carsten Claussen, Sandra Westhaus, Jeanette Reinshagen, Maria Kuzikov, Markus Wolf, Gerd Geisslinger, Philip Gribbon, Sandra Ciesek
Abstract : To identify possible candidates for progression towards clinical studies against SARS-CoV-2, we screened a well-defined collection of 5632 compounds including 3488 compounds which have undergone clinical investigations (marketed drugs, phases 1 -3, and withdrawn) across 600 indications. Compounds were screened for their inhibition of viral induced cytotoxicity using the human epithelial colorectal adenocarcinoma cell line Caco-2 and a SARS-CoV-2 isolate. The primary screen of 5632 compounds gave 271 hits. A total of 64 compounds with IC50 <20 µM were identified, including 19 compounds with IC50 < 1 µM. Of this confirmed hit population, 90% have not yet been previously reported as active against SARS-CoV-2 in-vitro cell assays. Some 37 of the actives are launched drugs, 19 are in phases 1-3 and 10 pre-clinical. Several inhibitors were associated with modulation of host pathways including kinase signaling P53 activation, ubiquitin pathways and PDE activity modulation, with long chain acyl transferases were effective viral inhibitors.
|
SARS-CoV-2 3CL-Pro protease inhibition percentage at 20µM by FRET kind of response from peptide substrate
|
Severe acute respiratory syndrome coronavirus 2
|
21.04
%
|
|
SARS-CoV-2 3CL-Pro protease inhibition percentage at 20µM by FRET kind of response from peptide substrate
|
Severe acute respiratory syndrome coronavirus 2
|
15.96
%
|
|
Title : Identification of inhibitors of SARS-Cov2 M-Pro enzymatic activity using a small molecule repurposing screen
Year : 2020
Authors : Maria Kuzikov, Elisa Costanzi, Jeanette Reinshagen, Francesca Esposito, Laura Vangeel, Markus Wolf, Bernhard Ellinger, Carsten Claussen, Gerd Geisslinger, Angela Corona, Daniela Iaconis, Carmine Talarico, Candida Manelfi, Rolando Cannalire, Giulia Rossetti, Jonas Gossen, Simone Albani, Francesco Musiani, Katja Herzog, Yang Ye, Barbara Giabbai, Nicola Demitri, Dirk Jochmans, Steven De Jonghe, Jasper Rymenants, Vincenzo Summa, Enzo Tramontano, Andrea R. Beccari, Pieter Leyssen, Paola Storici, Johan Neyts, Philip Gribbon, and Andrea Zaliani
Abstract : Compound repurposing is an important strategy being pursued in the identification of effective treatment against the SARS-CoV-2 infection and COVID-19 disease. In this regard, SARS-CoV-2 main protease (M-Pro), also termed 3CL-Pro, is an attractive drug target as it plays a central role in viral replication by processing the viral polyprotein into 11 non-structural proteins. We report the results of a screening campaign involving ca 8.7 K compounds containing marketed drugs, clinical and preclinical candidates, and chemicals regarded as safe in humans. We confirmed previously reported inhibitors of 3CL-Pro, but we have also identified 68 compounds with IC50 lower than 1 uM and 127 compounds with IC50 lower than 5 uM. Profiling showed 67% of confirmed hits were selective (> 5 fold) against other Cys- and Ser- proteases (Chymotrypsin and Cathepsin-L) and MERS 3CL-Pro. Selected compounds were also analysed in their binding characteristics.
|
Antiviral activity determined as inhibition of SARS-CoV-2 induced cytotoxicity of VERO-6 cells at 10 uM after 48 hours exposure to 0.01 MOI SARS CoV-2 virus by high content imaging
|
Chlorocebus sabaeus
|
0.1
%
|
|
Antiviral activity determined as inhibition of SARS-CoV-2 induced cytotoxicity of VERO-6 cells at 10 uM after 48 hours exposure to 0.01 MOI SARS CoV-2 virus by high content imaging
|
Chlorocebus sabaeus
|
0.06
%
|
|
Antiviral activity determined as inhibition of SARS-CoV-2 induced cytotoxicity of VERO-6 cells at 10 uM after 48 hours exposure to 0.01 MOI SARS CoV-2 virus by high content imaging
|
Chlorocebus sabaeus
|
0.06
%
|
|
Antiviral activity determined as inhibition of SARS-CoV-2 induced cytotoxicity of VERO-6 cells at 10 uM after 48 hours exposure to 0.01 MOI SARS CoV-2 virus by high content imaging
|
Chlorocebus sabaeus
|
0.1
%
|
|
Title : Cytopathic SARS-Cov2 screening on VERO-E6 cells in a large repurposing effort
Year : 2020
Authors : Andrea Zaliani, Laura Vangeel, Jeanette Reinshagen, Daniela Iaconis, Maria Kuzikov, Oliver Keminer, Markus Wolf, Bernhard Ellinger, Francesca Esposito, Angela Corona, Enzo Tramontano, Candida Manelfi, Katja Herzog, Dirk Jochmans, Steven De Jonghe, Winston Chiu, Thibault Francken, Joost Schepers, Caroline Collard, Kayvan Abbasi, Carsten Claussen , Vincenzo Summa, Andrea R. Beccari, Johan Neyts, Philip Gribbon and Pieter Leyssen
Abstract : Worldwide, there are intensive efforts to identify repurposed drugs as potential therapies against SARS-CoV-2 infection and the associated COVID-19 disease. To date, the anti-inflammatory drug dexamethasone and (to a lesser extent) the RNA-polymerase inhibitor remdesivir have been shown to be effective in reducing mortality and patient time to recovery, respectively, in patients. Here, we report the results of a phenotypic screening campaign within an EU-funded project (H2020-EXSCALATE4COV) aimed at extending the repertoire of anti-COVID therapeutics through repurposing of available compounds and highlighting compounds with new mechanisms of action against viral infection. We screened 8702 molecules from different repurposing libraries, to reveal 110 compounds with an anti-cytopathic IC50 < 20 µM. From this group, 18 with a safety index greater than 2 are also marketed drugs, making them suitable for further study as potential therapies against COVID-19. Our result supports the idea that a systematic approach to repurposing is a valid strategy to accelerate the necessary drug discovery process.
|
Displacement of fluormone from GST-tagged ERbeta receptor LBD (unknown origin) measured after 60 mins by TR-FRET competitive binding assay
|
Homo sapiens
|
0.94
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and evaluation of 17α-triazolyl and 9α-cyano derivatives of estradiol.
Year : 2020
Volume : 28
Issue : 19
First Page : 115670
Last Page : 115670
Authors : Wetzel EA,Hanson AM,Troutfetter CL,Burkett DJ,Sem DS,Donaldson WA
Abstract : A variety of 17α-triazolyl and 9α-cyano derivatives of estradiol were prepared and evaluated for binding to human ERβ in both a TR-FRET assay, as well as ERβ and ERα agonism in cell-based functional assays. 9α-Cyanoestradiol (5) was nearly equipotent as estradiol as an agonist for both ERβ and ERα. The potency of the 17α-triazolylestradiol analogs is considerably more variable and depends on the nature of the 4-substituent of the triazole ring. While rigid protein docking simulations exhibited significant steric clashing, induced fit docking providing more protein flexibility revealed that the triazole linker of analogs 2d and 2e extends outside of the traditional ligand binding domain with the benzene ring located in the loop connecting helix 11 to helix 12.
|
Agonist activity at full length human ERalpha receptor assessed as transcriptional activity incubated for 22 to 24 hrs by cell based luciferase reporter gene assay
|
Homo sapiens
|
2.4
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and evaluation of 17α-triazolyl and 9α-cyano derivatives of estradiol.
Year : 2020
Volume : 28
Issue : 19
First Page : 115670
Last Page : 115670
Authors : Wetzel EA,Hanson AM,Troutfetter CL,Burkett DJ,Sem DS,Donaldson WA
Abstract : A variety of 17α-triazolyl and 9α-cyano derivatives of estradiol were prepared and evaluated for binding to human ERβ in both a TR-FRET assay, as well as ERβ and ERα agonism in cell-based functional assays. 9α-Cyanoestradiol (5) was nearly equipotent as estradiol as an agonist for both ERβ and ERα. The potency of the 17α-triazolylestradiol analogs is considerably more variable and depends on the nature of the 4-substituent of the triazole ring. While rigid protein docking simulations exhibited significant steric clashing, induced fit docking providing more protein flexibility revealed that the triazole linker of analogs 2d and 2e extends outside of the traditional ligand binding domain with the benzene ring located in the loop connecting helix 11 to helix 12.
|
Antagonist activity at full length human ERalpha receptor assessed as inhibition of estradiol-induced activation incubated for 22 to 24 hrs by cell based luciferase reporter gene assay
|
Homo sapiens
|
50.0
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and evaluation of 17α-triazolyl and 9α-cyano derivatives of estradiol.
Year : 2020
Volume : 28
Issue : 19
First Page : 115670
Last Page : 115670
Authors : Wetzel EA,Hanson AM,Troutfetter CL,Burkett DJ,Sem DS,Donaldson WA
Abstract : A variety of 17α-triazolyl and 9α-cyano derivatives of estradiol were prepared and evaluated for binding to human ERβ in both a TR-FRET assay, as well as ERβ and ERα agonism in cell-based functional assays. 9α-Cyanoestradiol (5) was nearly equipotent as estradiol as an agonist for both ERβ and ERα. The potency of the 17α-triazolylestradiol analogs is considerably more variable and depends on the nature of the 4-substituent of the triazole ring. While rigid protein docking simulations exhibited significant steric clashing, induced fit docking providing more protein flexibility revealed that the triazole linker of analogs 2d and 2e extends outside of the traditional ligand binding domain with the benzene ring located in the loop connecting helix 11 to helix 12.
|
Antagonist activity at full length human ERbeta receptor assessed as inhibition of estradiol-induced activation incubated for 22 to 24 hrs by cell based luciferase reporter gene assay
|
Homo sapiens
|
10.0
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and evaluation of 17α-triazolyl and 9α-cyano derivatives of estradiol.
Year : 2020
Volume : 28
Issue : 19
First Page : 115670
Last Page : 115670
Authors : Wetzel EA,Hanson AM,Troutfetter CL,Burkett DJ,Sem DS,Donaldson WA
Abstract : A variety of 17α-triazolyl and 9α-cyano derivatives of estradiol were prepared and evaluated for binding to human ERβ in both a TR-FRET assay, as well as ERβ and ERα agonism in cell-based functional assays. 9α-Cyanoestradiol (5) was nearly equipotent as estradiol as an agonist for both ERβ and ERα. The potency of the 17α-triazolylestradiol analogs is considerably more variable and depends on the nature of the 4-substituent of the triazole ring. While rigid protein docking simulations exhibited significant steric clashing, induced fit docking providing more protein flexibility revealed that the triazole linker of analogs 2d and 2e extends outside of the traditional ligand binding domain with the benzene ring located in the loop connecting helix 11 to helix 12.
|
Agonist activity at full length human ERbeta receptor assessed as transcriptional activity incubated for 22 to 24 hrs by cell based luciferase reporter gene assay
|
Homo sapiens
|
0.5
nM
|
|
Journal : Bioorg Med Chem
Title : Synthesis and evaluation of 17α-triazolyl and 9α-cyano derivatives of estradiol.
Year : 2020
Volume : 28
Issue : 19
First Page : 115670
Last Page : 115670
Authors : Wetzel EA,Hanson AM,Troutfetter CL,Burkett DJ,Sem DS,Donaldson WA
Abstract : A variety of 17α-triazolyl and 9α-cyano derivatives of estradiol were prepared and evaluated for binding to human ERβ in both a TR-FRET assay, as well as ERβ and ERα agonism in cell-based functional assays. 9α-Cyanoestradiol (5) was nearly equipotent as estradiol as an agonist for both ERβ and ERα. The potency of the 17α-triazolylestradiol analogs is considerably more variable and depends on the nature of the 4-substituent of the triazole ring. While rigid protein docking simulations exhibited significant steric clashing, induced fit docking providing more protein flexibility revealed that the triazole linker of analogs 2d and 2e extends outside of the traditional ligand binding domain with the benzene ring located in the loop connecting helix 11 to helix 12.
