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EC313-a tissue selective SPRM reduces the growth and proliferation of uterine fibroids in a human uterine fibroid tissue xenograft model. Sci Rep 2019; 9:17279. [PMID: 31754172 PMCID: PMC6872653 DOI: 10.1038/s41598-019-53467-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 10/31/2019] [Indexed: 11/09/2022] Open
Abstract
Uterine fibroids (UFs) are associated with irregular or excessive uterine bleeding, pelvic pain or pressure, or infertility. Ovarian steroid hormones support the growth and maintenance of UFs. Ulipristal acetate (UPA) a selective progesterone receptor (PR) modulator (SPRM) reduce the size of UFs, inhibit ovulation and lead to amenorrhea. Recent liver toxicity concerns with UPA, diminished enthusiasm for its use and reinstate the critical need for a safe, efficacious SPRM to treat UFs. In the current study, we evaluated the efficacy of new SPRM, EC313, for the treatment for UFs using a NOD-SCID mouse model. EC313 treatment resulted in a dose-dependent reduction in the fibroid xenograft weight (p < 0.01). Estradiol (E2) induced proliferation was blocked significantly in EC313-treated xenograft fibroids (p < 0.0001). Uterine weight was reduced by EC313 treatment compared to UPA treatment. ER and PR were reduced in EC313-treated groups compared to controls (p < 0.001) and UPA treatments (p < 0.01). UF specific desmin and collagen were markedly reduced with EC313 treatment. The partial PR agonism and no signs of unopposed estrogenicity makes EC313 a candidate for the long-term treatment for UFs. Docking studies have provided a structure based explanation for the SPRM activity of EC313.
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Benagiano G, Bastianelli C, Farris M, Brosens I. Selective progesterone receptor modulators: an update. Expert Opin Pharmacother 2014; 15:1403-15. [PMID: 24787486 DOI: 10.1517/14656566.2014.914494] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Several selective progesterone receptor modulators (SPRMs) show promise in several areas of medicine and this work has been summarized by us in 2008. AREAS COVERED Since the publication of our reviews, several developments have taken place in the field of reproductive medicine. The first is emergency contraception (EC). Two SPRMs are clinically utilized today: mifepristone (MFP) and ulipristal acetate (UPA). MFP is available for EC in up to 120 h following unprotected intercourse. A dose of 10 mg is significantly more effective than levonorgestrel (LNG). In a metanalysis of the use of UPA versus LNG up to 72 h after unprotected intercourse, failure rates of 1.4 versus 2.2% were reported. The second is contraception. A daily dose of 2 mg MFP can block ovulation and several MFP regimens are being tested, including a vaginal ring releasing MFP. The third is the preoperative administration in women harboring leiomyomas, where clinical testing of several SPRM has shown that they can decrease uterine leiomyomas' size and substantially reduce uterine bleeding. SPRM can induce unusual, specific endometrial appearances. Many believe that these changes should not cause concern, but the issue remains controversial. EXPERT OPINION SPRMs are very effective in EC and for the preoperative treatment of uterine leiomyomas.
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Affiliation(s)
- Giuseppe Benagiano
- University of Rome, 'Sapienza', Department of Gynaecology, Obstetrics and Urology , C/O AIED Via Toscana 30, 00187 Rome , Italy
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Cunha S, Gano L, Morais GR, Thiemann T, Oliveira MC. Progesterone receptor targeting with radiolabelled steroids: an approach in predicting breast cancer response to therapy. J Steroid Biochem Mol Biol 2013; 137:223-41. [PMID: 23669457 DOI: 10.1016/j.jsbmb.2013.04.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 04/24/2013] [Accepted: 04/30/2013] [Indexed: 11/30/2022]
Abstract
Steroid receptors have demonstrated to be potentially useful biological targets for the diagnosis and therapy follow-up of hormonally responsive cancers. The over-expression of these proteins in human cancer cells as well as their binding characteristics provides a favourable mechanism for the localization of malignant tumours. The need for newer and more selective probes to non-invasively assess steroid receptor expression in hormone-responsive tumours has encouraged the synthesis and the biological evaluation of several steroidal derivatives labelled with positron and gamma emitters. The physiological effects of the steroid hormone progesterone are mediated by the progesterone receptor (PR). Since PR expression is stimulated by the oestrogen receptor (ER), PR status has been considered as a biomarker of ER activity and its value for predicting and monitoring therapeutic efficacy of hormonal therapy has been studied. Imaging of PR-expressing breast cancer patients under hormonal therapy may be advantageous, since the response to therapy can be more accurately predicted after quantification of both ER and PR status. Thus, ligands for PR targeting, although much less explored than ER ligands, have gained some importance lately as potential PET and SPECT tumour imaging agents. In this review, we present a brief survey of explored approaches for progesterone targeting using radiolabelled progestins as potential clinical probes to predict responsiveness to breast cancer therapy. This article is part of a Special Issue entitled "Synthesis and biological testing of steroid derivatives as inhibitors".
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Affiliation(s)
- Susana Cunha
- Unidade de Ciências Químicas e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico, Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953 Sacavém, Portugal
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Li X, Bao Y, Fang P, Chen Y, Qiao Z. Effect of mifepristone on COX-2 both in eutopic and ectopic endometrium in mouse endometriotic model. Arch Gynecol Obstet 2012; 286:939-46. [DOI: 10.1007/s00404-012-2379-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Accepted: 05/08/2012] [Indexed: 10/28/2022]
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Lusher SJ, Raaijmakers HCA, Vu-Pham D, Kazemier B, Bosch R, McGuire R, Azevedo R, Hamersma H, Dechering K, Oubrie A, van Duin M, de Vlieg J. X-ray structures of progesterone receptor ligand binding domain in its agonist state reveal differing mechanisms for mixed profiles of 11β-substituted steroids. J Biol Chem 2012; 287:20333-43. [PMID: 22535964 DOI: 10.1074/jbc.m111.308403] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We present here the x-ray structures of the progesterone receptor (PR) in complex with two mixed profile PR modulators whose functional activity results from two differing molecular mechanisms. The structure of Asoprisnil bound to the agonist state of PR demonstrates the contribution of the ligand to increasing stability of the agonist conformation of helix-12 via a specific hydrogen-bond network including Glu(723). This interaction is absent when the full antagonist, RU486, binds to PR. Combined with a previously reported structure of Asoprisnil bound to the antagonist state of the receptor, this structure extends our understanding of the complex molecular interactions underlying the mixed agonist/antagonist profile of the compound. In addition, we present the structure of PR in its agonist conformation bound to the mixed profile compound Org3H whose reduced antagonistic activity and increased agonistic activity compared with reference antagonists is due to an induced fit around Trp(755), resulting in a decreased steric clash with Met(909) but inducing a new internal clash with Val(912) in helix-12. This structure also explains the previously published observation that 16α attachments to RU486 analogs induce mixed profiles by altering the binding of 11β substituents. Together these structures further our understanding of the steric and electrostatic factors that contribute to the function of steroid receptor modulators, providing valuable insight for future compound design.
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Affiliation(s)
- Scott J Lusher
- Departments of Molecular Design and Informatics, MSD, P. O. Box 20, 5340 BH, Oss, The
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Affiliation(s)
- Carlos M Telleria
- Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, 414 East Clark Street, Vermillion, SD 57069
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Lusher SJ, Raaijmakers HCA, Vu-Pham D, Dechering K, Lam TW, Brown AR, Hamilton NM, Nimz O, Bosch R, McGuire R, Oubrie A, de Vlieg J. Structural basis for agonism and antagonism for a set of chemically related progesterone receptor modulators. J Biol Chem 2011; 286:35079-86. [PMID: 21849509 DOI: 10.1074/jbc.m111.273029] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The progesterone receptor is able to bind to a large number and variety of ligands that elicit a broad range of transcriptional responses ranging from full agonism to full antagonism and numerous mixed profiles inbetween. We describe here two new progesterone receptor ligand binding domain x-ray structures bound to compounds from a structurally related but functionally divergent series, which show different binding modes corresponding to their agonistic or antagonistic nature. In addition, we present a third progesterone receptor ligand binding domain dimer bound to an agonist in monomer A and an antagonist in monomer B, which display binding modes in agreement with the earlier observation that agonists and antagonists from this series adopt different binding modes.
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Affiliation(s)
- Scott J Lusher
- Department of Molecular Design and Informatics, DMPK, MSD, PO Box 20, 5340 BH Oss, The Netherlands.
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Sarkar NN. The state-of-the-art of emergency contraception with the cutting edge drug. GERMAN MEDICAL SCIENCE : GMS E-JOURNAL 2011; 9:Doc16. [PMID: 21808601 PMCID: PMC3141844 DOI: 10.3205/000139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 06/08/2011] [Indexed: 11/30/2022]
Abstract
The objective of this study is to evaluate and elucidated the potential of selective progesterone receptor modulators (SPRMs) to be an effective emergency contraception (EC). The data are extracted from the literature through the MEDLINE database service from 2000-2010. The SPRMs are in fact progesterone receptor ligands that could bind to progesterone receptor (PR) and exert antagonistic, agonistic or mixed agonist-antagonistic effects. These SPRMs are mifepristone, onapristone, asoprisnil, ulipristal, proellex among other compounds. Currently developed SPRMs may exert contraceptive effects by inhibiting ovulation and retarding endometrial synchronization. Low-doses of progesterone antagonists retard endometrial maturation without affecting ovulation. Mifepristone being a SPRM is effective for prevention of pregnancy but with prostaglandin acts as an excellent abortifacient; yet could not compete with levonorgestrel as EC. However, a single dose of 30 mg ulipristal acetate, another SPRM with similar effectiveness and side effect profiles as 1.5 mg levonorgestrel EC, has shown wider 'window of effect' by inhibition of the LH peak even if administered at the advanced pre-ovulatory phase, a time when use of levonorgestrel EC is no longer effective. Thus, ulipristal acetate goes one-step ahead of levonorgestrel in the field of emergency contraception treatment. Further studies are needed to explore the potential of other SPRMs to be cutting edge emergency contraceptive drugs.
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Affiliation(s)
- Narendra Nath Sarkar
- Department of Reproductive Biology, All India Institute of Medical Sciences, Ansari Nagar, New Dellhi, India
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Tieszen CR, Goyeneche AA, Brandhagen BN, Ortbahn CT, Telleria CM. Antiprogestin mifepristone inhibits the growth of cancer cells of reproductive and non-reproductive origin regardless of progesterone receptor expression. BMC Cancer 2011; 11:207. [PMID: 21619605 PMCID: PMC3125282 DOI: 10.1186/1471-2407-11-207] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2011] [Accepted: 05/27/2011] [Indexed: 01/20/2023] Open
Abstract
Background Mifepristone (MF) has been largely used in reproductive medicine due to its capacity to modulate the progesterone receptor (PR). The study of MF has been expanded to the field of oncology; yet it remains unclear whether the expression of PR is required for MF to act as an anti-cancer agent. Our laboratory has shown that MF is a potent inhibitor of ovarian cancer cell growth. In this study we questioned whether the growth inhibitory properties of MF observed in ovarian cancer cells would translate to other cancers of reproductive and non-reproductive origin and, importantly, whether its efficacy is related to the expression of cognate PR. Methods Dose-response experiments were conducted with cancer cell lines of the nervous system, breast, prostate, ovary, and bone. Cultures were exposed to vehicle or increasing concentrations of MF for 72 h and analysed for cell number and cell cycle traverse, and hypodiploid DNA content characteristic of apoptotic cell death. For all cell lines, expression of steroid hormone receptors upon treatment with vehicle or cytostatic doses of MF for 24 h was studied by Western blot, whereas the activity of the G1/S regulatory protein Cdk2 in both treatment groups was monitored in vitro by the capacity of Cdk2 to phosphorylate histone H1. Results MF growth inhibited all cancer cell lines regardless of tissue of origin and hormone responsiveness, and reduced the activity of Cdk2. Cancer cells in which MF induced G1 growth arrest were less susceptible to lethality in the presence of high concentrations of MF, when compared to cancer cells that did not accumulate in G1. While all cancer cell lines were growth inhibited by MF, only the breast cancer MCF-7 cells expressed cognate PR. Conclusions Antiprogestin MF inhibits the growth of different cancer cell lines with a cytostatic effect at lower concentrations in association with a decline in the activity of the cell cycle regulatory protein Cdk2, and apoptotic lethality at higher doses in association with increased hypodiploid DNA content. Contrary to common opinion, growth inhibition of cancer cells by antiprogestin MF is not dependent upon expression of classical, nuclear PR.
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Affiliation(s)
- Chelsea R Tieszen
- Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, Vermillion, SD, USA
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Goyeneche AA, Seidel EE, Telleria CM. Growth inhibition induced by antiprogestins RU-38486, ORG-31710, and CDB-2914 in ovarian cancer cells involves inhibition of cyclin dependent kinase 2. Invest New Drugs 2011; 30:967-80. [PMID: 21424700 PMCID: PMC3348464 DOI: 10.1007/s10637-011-9655-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Accepted: 03/02/2011] [Indexed: 12/25/2022]
Abstract
Antiprogestins have been largely utilized in reproductive medicine, yet their repositioning for oncologic use is rapidly emerging. In this study we investigated the molecular mediators of the anti-ovarian cancer activity of the structurally related antiprogestins RU-38486, ORG-31710 and CDB-2914. We studied the responses of wt p53 OV2008 and p53 null SK-OV-3 cells to varying doses of RU-38486, ORG-31710 and CDB-2914. The steroids inhibited the growth of both cell lines with a potency of RU-38486 > ORG-31710 > CDB-2914, and were cytostatic at lower doses but lethal at higher concentrations. Antiprogestin-induced lethality associated with morphological features of apoptosis, hypodiploid DNA content, DNA fragmentation, and cleavage of executer caspase substrate PARP. Cell death ensued despite RU-38486 caused transient up-regulation of anti-apoptotic Bcl-2, ORG-31710 induced transient up-regulation of inhibitor of apoptosis XIAP, and CDB-2914 up-regulated both XIAP and Bcl-2. The antiprogestins induced accumulation of Cdk inhibitors p21cip1 and p27kip1 and increased association of p21cip1 and p27kip1 with Cdk-2. They also promoted nuclear localization of p21cip1 and p27kip1, reduced the nuclear abundances of Cdk-2 and cyclin E, and blocked the activity of Cdk-2 in both nucleus and cytoplasm. The cytotoxic potency of the antiprogestins correlated with the magnitude of the inhibition of Cdk-2 activity, ranging from G1 cell cycle arrest towards cell death. Our results suggest that, as a consequence of their cytostatic and lethal effects, antiprogestin steroids of well-known contraceptive properties emerge as attractive new agents to be repositioned for ovarian cancer therapeutics.
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Affiliation(s)
- Alicia A. Goyeneche
- Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, Vermillion, SD USA
| | - Erin E. Seidel
- Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, Vermillion, SD USA
| | - Carlos M. Telleria
- Division of Basic Biomedical Sciences, Sanford School of Medicine of The University of South Dakota, Vermillion, SD USA
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Richardson TI, Clarke CA, Yu KL, Yee YK, Bleisch TJ, Lopez JE, Jones SA, Hughes NE, Muehl BS, Lugar CW, Moore TL, Shetler PK, Zink RW, Osborne JJ, Montrose-Rafizadeh C, Patel N, Geiser AG, Galvin RJS, Dodge JA. Novel 3-aryl indoles as progesterone receptor antagonists for uterine fibroids. ACS Med Chem Lett 2011; 2:148-53. [PMID: 24900294 PMCID: PMC4017981 DOI: 10.1021/ml100220b] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2010] [Accepted: 11/27/2010] [Indexed: 11/29/2022] Open
Abstract
We report the synthesis and characterization of novel 3-aryl indoles as potent and efficacious progesterone receptor (PR) antagonists with potential for the treatment of uterine fibroids. These compounds demonstrated excellent selectivity over other steroid nuclear hormone receptors such as the mineralocorticoid receptor (MR). They were prepared from 2-bromo-6-nitro indole in four to six steps using a Suzuki cross-coupling as the key step. Compound 8f was orally active in the complement 3 model of progesterone antagonism in the rat uterus and demonstrated partial antagonism in the McPhail model of progesterone activity.
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Affiliation(s)
- Timothy I Richardson
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Christian A Clarke
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Kuo-Long Yu
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Ying K Yee
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Thomas J Bleisch
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Jose E Lopez
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Scott A Jones
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Norman E Hughes
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Brian S Muehl
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Charles W Lugar
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Terry L Moore
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Pamela K Shetler
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Richard W Zink
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - John J Osborne
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Chahrzad Montrose-Rafizadeh
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Nita Patel
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Andrew G Geiser
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Rachelle J Sells Galvin
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Jeffrey A Dodge
- Lilly Research Laboratories, Eli Lilly & Co., Lilly Corporate Center, Indianapolis, Indiana 46285, United States
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Schmees N, Weinmann H. Recent patent trends in the field of progesterone receptor agonists and modulators. Expert Opin Ther Pat 2010; 19:1521-34. [PMID: 19785507 DOI: 10.1517/13543770903312946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Progesterone receptor agonists are used in female contraception, hormone replacement therapy or some gynecological conditions like endometriosis. The interest for antagonists or selective progesterone receptor modulators (SPRMs) is growing. Recent reports on this class of compounds indicate that they could become the next generation of therapeutics in gynecological treatments. OBJECTIVE This overview summarizes the work on progesterone receptor agonists, SPRMs and antagonists reported in the patent literature in the past 4 years. METHODS The focus of the article is the examination of patents, primarily published as WO, EU or US patents since 2005. In some cases, additional data from the public literature is included into the discussion. These data are of substantial interest as the available biological data disclosed in patents are usually limited for new compound classes. RESULTS/CONCLUSION Some highly active clusters of compounds have been disclosed in the past 4 years. The current research seems to focus on SPRMs and progesterone receptor antagonists.
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Affiliation(s)
- Norbert Schmees
- Bayer Schering Pharma, Medicinal Chemistry, Muellerstrasse 178, 13353 Berlin, Germany.
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Benagiano G, Bastianelli C, Farris M. Selective progesterone receptor modulators 3: use in oncology, endocrinology and psychiatry. Expert Opin Pharmacother 2008; 9:2487-96. [PMID: 18778186 DOI: 10.1517/14656566.9.14.2487] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND A number of synthetic steroids are capable of modulating progesterone receptors with a spectrum of activities ranging from pure antagonism to a mixture of agonism and antagonism. The best known of these are mifepristone (RU 486), asoprisnil (J 867), onapristone (ZK 98299), ulipristal (CDB 2914), Proellex() (CDB 4124), ORG 33628 and ORG 31710. OBJECTIVE Outside reproduction selective modulators of progesterone receptors have been under investigation for a large variety of indications, for example in oncology as adjuvants in breast, cervical, endometrial, ovarian and prostate cancer, as well as inoperable meningioma and leiomyosarcoma. In addition, they have been used as antiglucocorticoids. It is therefore useful to review the results obtained in these conditions. METHODS A careful evaluation of existing major review papers and of recently published articles was carried out for the indications under review, focusing not only on mifepristone but also on those other selective modulators of progesterone receptors for which data are available. RESULTS/CONCLUSIONS In preliminary studies selective modulators of progesterone receptors had some activity on a number of neoplasias. Their antiglucocorticoid activity has been tested with some success in Cushing's syndrome, several psychiatric conditions (e.g., mood disorders and Alzheimer's disease) and acute renal failure. Finally they are being used in a gene regulator system.
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Affiliation(s)
- Giuseppe Benagiano
- University 'la Sapienza', Postgraduate School of Gynaecology and Obstetrics, Policlinico Umberto I degrees , Viale Regina Margherita 245, 00161 Roma, Italy
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