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472514568

至尊木虫 (职业作家)

小木虫议政大臣兼协办大学士

[交流] 求文献一篇 有链接

【作者(必填)】 Deng Y, Bi HC, Zhao LZ, Wang XD, Chen J, Ou ZM, Ding L, Xu LJ, Guan S, Chen X, Zhou SF, Huang M.
【文题(必填)】 Induction of cytochrome P450 3A by the Ginkgo biloba extract and bilobalides in human and rat primary hepatocytes.
【期刊名,年份,卷(期),起止页码(必填)】 Drug Metab Lett. 2008 Jan;2(1):60-6.
【全文链接或数据库名称(选填)】 http://www.ncbi.nlm.nih.gov/pubmed/19356072
保持心灵的纯洁
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luoxianyang

银虫 (正式写手)

472514568(金币+1, 博学EPI+1):虽然没有找到全文 但还是很感谢你 2010-04-12 16:30
仅找到摘要,不好意思。
Abstract:

Ginkgo biloba is one of the most popular herbal medicines in the world, due to its purported pharmacological effects, including memory-enhancing, cognition-improving, and antiplatelet effects. The study aimed to investigate the activity and expression of cytochrome P450 (CYP) 3A in human and rat primary hepatocytes treated with standardized G. biloba extract (100, 500, and 2500 ng/ml) for 72 hr, and to measure the protein expression of CYP3A in human and rat primary hepatocytes treated with bilobalide (2, 10, and 50 ng/ml) and ginkgolides B (2, 10, and 50 ng/ml). The activity of CYP3A was measured by the quantification of dehydronifedipine formation using a validated tandem liquid chromatography mass spectrometry (LC/MS/MS) method. The levels of mRNA and protein of CYP3A were determined by reverse transcription-polymerase chain reaction (RT-PCR) and Western-blotting analysis, respectively. The G. biloba extract at 100-2,500 ng/ml significantly induced the activity, protein and mRNA expression of CYP3A in a dose-dependent manner in human and rat primary hepatocytes. Bilobalide at 2-50 ng/ml significantly increased CYP3A protein expression in a dose-dependent manner in human and rat primary hepatocytes. However, ginkgolide B did not affect CYP3A protein expression in vitro. The results indicate that G. biloba extract pretreatment significantly induced the expression of CYP3A protein and mRNA and increased CYP3A activity, and there was no significant species difference between human and rat. G. biloba may cause potential interactions with substrate drugs of CYP3A. Bilobalide might play a key role in the enzyme- inducing effects of G. biloba extract. Further study is needed to identify the substances in GBE that induce CYPs in vivo, and elucidate the molecular mechanism of CYP3A induction by GBE and bilobalides.



Keywords: Ginkgo biloba extract; bilobalide; ginkgolide B; cytochrome P450; CYP3A; induction; human and rat primary hepatocytes

Document Type: Research article

DOI: 10.2174/187231208783478489
2楼2010-04-11 16:09:36
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jlliu2000

至尊木虫 (著名写手)

到文献求助版去求助文献
3楼2010-04-11 16:12:52
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cedefe

木虫 (正式写手)

这个作者不是中山大学的吗?你可以直接写信给他,向他要一份就是!
4楼2010-04-11 18:33:33
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alwaysmart

铁杆木虫 (职业作家)

飞天猫

注册这个,难找文献他们帮你下
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5楼2010-04-11 18:53:17
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