责任的筛查研究八个不同的女性性类固醇抑制CYP2C9, 2 c19和3 a4活动在人类肝脏微粒体。
文章的细节
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引用
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莱恩K Yasar U,扩大J, Tybring G
责任的筛查研究八个不同的女性性类固醇抑制CYP2C9, 2 c19和3 a4活动在人类肝脏微粒体。
Toxicol杂志》2003年8月,93 (2):77 - 81。
- PubMed ID
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12899669 (在PubMed]
- 文摘
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本研究的目的是为了屏幕不同临床使用的潜在抑制雌激素和黄体酮激素对CYP2C9 2 c19和3 a4活动在人类肝脏微粒体。抑制的程度由去氧孕烯、3-ketodesogestrel 17-beta-oestradiol,孕二烯酮,aethinyloestradiol,醋酸甲羟孕酮,norethisterone或L-norgestrel就读于100 microM洛沙坦氧化(CYP2C9) R-omeprazole 5 '羟基化(CYP2C19)和R-omeprazole sulphoxidation (CYP3A4) 10分钟预培养和NADPH在人类肝微粒体准备从6个人的基因供体肝脏。Aethinyloestradiol被发现是一个强有力的抑制剂(55%意味着抑制;95%可信区间的32%到79%)洛沙坦氧化(CYP2C9)和R-omeprazole 5-hydroxylation (70%;63%到77%)(CYP2C19),而它几乎没有影响R-omeprazole sulphoxidation (CYP3A4)活动。17-beta-Oestradiol没有产生显著抑制的酶活性研究。黄体酮激素的研究,孕二烯酮和3-ketodesogestrel CYP2C19强有力的抑制剂(57%;47%,67%和51%;29%到45%)和CYP3A4 (45%;30%,59%和40%; 19% to 62%), but had little effect on the CYP2C9 activity. In addition, medroxyprogesterone acetate was found to inhibit CYP2C9 (55%; 45% to 65%), while not having significant effect on 2C19 or 3A4. In conclusion, the liability of clinically used female sex steroids to inhibit CYP2C9, 2C19 and 3A4 activities in human liver microsomes is very distinctive and these differences among both the oestrogen and progestin hormones may, at least in part, explain the variable results from clinical trials examining inhibitory effects of hormone replacement therapy and oral contraceptives on drug metabolism.
DrugBank数据引用了这篇文章
- 药物酶
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药物 酶 类 生物 药理作用 行动 孕二烯酮 细胞色素P450 2 c19 蛋白质 人类 未知的抑制剂细节 醋酸甲羟孕酮 细胞色素P450 2 c9 蛋白质 人类 未知的抑制剂细节