title: 17beta-Hydroxysteroid dehydrogenase inhibitors: a patent review.
abstract: BACKGROUND
  17beta-Hydroxysteroid dehydrogenases (17beta-HSDs) mainly catalyze the reduction of C17-ketosteroids to their corresponding hydroxylated forms as well as the reverse reaction (oxidation). Able to convert inactive or less active steroid hormones into more potent ones and vice versa, certain 17beta-HSDs play a key role, especially in the regulation of estrogen and androgen levels. The therapeutic potential of this enzyme family, especially for the treatment of breast cancer, prostate cancer, acne and osteoporosis, then stimulated the development of inhibitors of 17beta-HSDs and important progress was achieved over the last years.
  
  
  METHODS
  This review article reports all patent applications related to the inhibitors of 17beta-HSDs, including some articles needed to complement the information presented.
  
  
  RESULTS
  Readers will be informed about the role and function of 17beta-HSDs in the first section and about the history of inhibitor development in the second section. Furthermore, in the third and main section, the readers will learn about the structures of patented inhibitors originating from different companies and academic groups.
  
  
  CONCLUSIONS
  The increase in the number of 17beta-HSD inhibitors reported in the last years augurs well for the future. The challenge is now to translate these results into clinical studies to allow determination of the therapeutic usefulness of 17beta-HSD inhibitors.
authors.affiliation: Laval University, CHUQ (CHUL)-Research Center, Endocrinology and Genomic Unit, Laboratory of Medicinal Chemistry, 2705 Laurier Boulevard, Québec, Canada. donald.poirier@crchul.ulaval.ca
authors.forename: Donald
authors.initials: D
authors.lastname: Poirier
mesh_terms: D015067:17-Hydroxysteroid Dehydrogenases / Q000037:antagonists & inhibitors* / Q000378:metabolism; D015068:17-Ketosteroids / Q000378:metabolism; D000152:Acne Vulgaris / Q000188:drug therapy / Q000201:enzymology; D000818:Animals; D002986:Clinical Trials as Topic; D015195:Drug Design; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D006801:Humans; D009369:Neoplasms / Q000188:drug therapy / Q000201:enzymology; D010024:Osteoporosis / Q000188:drug therapy / Q000201:enzymology; D010330:Patents as Topic
chemical_list: D015068:17-Ketosteroids; D004791:Enzyme Inhibitors; D015067:17-Hydroxysteroid Dehydrogenases