Metapristone
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Other names | RU-42633; Desmethylmifepristone; 17β-Hydroxy-11β-[4-(methylamino)phenyl]-17α-(prop-1-yn-1-yl)estra-4,9-dien-3-one |
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Formula | C28H33NO2 |
Molar mass | 415.577g·mol−1 |
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Metapristone(developmental code nameRU-42633;also known asdesmethylmifepristone) is the majormetaboliteofmifepristone(RU-486, RU-38486) and aselective progesterone receptor modulator(SPRM) which itself was never marketed.[1][2][3][4]It is formed from mifepristone in theliverby theenzymeCYP3A4viamonodemethylation,and circulates at concentrations higher than those of mifepristone.[1][5]The metabolite retains partial but considerableaffinityfor theprogesterone receptor(PR) and theglucocorticoid receptor(GR) (RBA = 21% and 61% of that of mifepristone for the human forms of these receptors, respectively).[6][1]On the basis of actions that are apparently independent of its hormonal activity, metapristone is being researched as a potentialcancermetastaticchemopreventiveagent.[2][3][4]
References[edit]
- ^abcHeikinheimo O (July 1997). "Clinical pharmacokinetics of mifepristone".Clin Pharmacokinet.33(1): 7–17.doi:10.2165/00003088-199733010-00002.PMID9250420.S2CID25101911.
- ^abWang J, Chen J, Wan L, Shao J, Lu Y, Zhu Y, Ou M, Yu S, Chen H, Jia L (March 2014)."Synthesis, spectral characterization, and in vitro cellular activities of metapristone, a potential cancer metastatic chemopreventive agent derived from mifepristone (RU486)".AAPS J.16(2): 289–98.doi:10.1208/s12248-013-9559-2.PMC3933578.PMID24442753.
- ^abWang J, Chen J, Zhu Y, Zheng N, Liu J, Xiao Y, Lu Y, Dong H, Xie J, Yu S, Shao J, Jia L (March 2016). "In vitro and in vivo efficacy and safety evaluation of metapristone and mifepristone as cancer metastatic chemopreventive agents".Biomed. Pharmacother.78:291–300.doi:10.1016/j.biopha.2016.01.017.PMID26898454.
- ^abChen W, Xiao Y, Chen J, Liu J, Shao J, Li T, Zhu Y, Ma J, Gao Y, Wang J, Xu J, Lu Y, Jia L (December 2017)."Sex-related pharmacokinetic differences and mechanisms of metapristone (RU486 metabolite)".Sci Rep.7(1): 17190.Bibcode:2017NatSR...717190C.doi:10.1038/s41598-017-17225-0.PMC5719405.PMID29215040.
- ^United States Pharmacopeial Convention (2006).USP DI: United States Pharmacopeia Dispensing Information.United States Pharmacopeial Convention. p. 1992.ISBN978-1-56363-574-8.
- ^Heikinheimo O, Kekkonen R, Lähteenmäki P (December 2003). "The pharmacokinetics of mifepristone in humans reveal insights into differential mechanisms of antiprogestin action".Contraception.68(6): 421–6.doi:10.1016/S0010-7824(03)00077-5.PMID14698071.