Structure–activity relationships for inhibition of human 5α-reductases by polyphenols
作者:Richard A. Hiipakka、Han-Zhong Zhang、Wei Dai、Qing Dai、Shutsung Liao
DOI:10.1016/s0006-2952(02)00848-1
日期:2002.3
natural and synthetic polyphenolic compounds were more effective inhibitors of the type 1 than the type 2 isozyme, including alizarin, anthrarobin, gossypol, nordihydroguaiaretic acid, caffeic acid phenethyl ester, and octyl and dodecyl gallates. The presence of a catechol group was characteristic of almost all inhibitors that showed selectivity for the type 1 isozyme of 5α-reductase. Since some of these
摘要类固醇5α-还原酶(EC 1.3.99.5)催化NADPH依赖性的多种3-oxo-Δ4类固醇双键双键还原,包括将睾丸激素转化为5α-二氢睾丸激素。在人类中,5α-还原酶活性对于男性性别分化的某些方面至关重要,并且可能参与良性前列腺增生,脱发,多毛症和前列腺癌的发展。某些天然产物包含的成分是5α-还原酶的抑制剂,例如绿茶儿茶素(-)-表没食子儿茶素没食子酸酯(EGCG)。EGCG在无细胞状态下显示出有效的抑制作用,但在5α-还原酶的全细胞分析中却没有。用长链脂肪酸代替EGCG中的没食子酸酯可产生有效的5α-还原酶抑制剂,该抑制剂在无细胞和全细胞分析系统中均具有活性。作为15α-还原酶有效抑制剂的其他类黄酮包括杨梅素,槲皮素,黄ical素和非瑟定。与1型同工酶相比,Biochanin A,黄豆苷元,染料木黄酮和山emp酚是2型抑制剂更好的抑制剂。几种其他天然和合成的多酚化合物比1型同功酶更