翻译一段文献, 可以给你的医生看看参考:
http://www.herbalgram.org/iherb/herbalgram/articleview.asp?a=2706
The active components of milk thistle, a group of three flavonolignans collectively known as silymarin, have the potential to influence the metabolism (breakdown) of antiretroviral drugs. [br]水飞蓟的有效成分, 一组三黄酮木脂素类..名为水飞蓟素, 对抗逆转录病毒药物的代谢(分解)具有很大影响.
Silymarin has been shown in laboratory (in vitro) studies to inhibit the activity of enzyme 3A4 of the cytochrome P450 enzyme system. This enzyme has been shown to metabolize many antiretroviral drugs in human hepatocyte cultures. [br]水飞蓟在试验室(试管)中显示会阻碍P450酶族中的3A4酶(也有叫CYP3A4)活性. 研究显示在人类肝细胞中3A4酶负责很多抗逆转录病毒药物的代谢作用.
Patients are prescribed a certain drug dose based on the knowledge of typical bioavailability of the drug. Therefore, reducing cytochrome P450 enzyme activity may increase the plasma levels of a drug and thus its potency or toxicity. [br]患者处方给某种药物+剂量, 这个药物剂量是建立在对这个药物生物性的知识/认知上. 所以, 减低P450酶活性会加大药物血清含量和其力价或毒性.
Silymarin may also alter pharmacokinetics (drug absorption, distribution, and elimination) via inhibition of the activity of P-glycoprotein, a transporter protein which transports drugs out of cells. [br]水飞蓟也可能会阻碍P-糖蛋白活性--一个运载蛋白, 将药物运送出细胞, 从而改变了药物动力(药物的吸收, 分布和排除) . (好像这个和多重抗药性也有关系)...
文章还提到其它一些天然药品的毒性, 肾脏毒性可能都和这个道理有关系. 希望引起人们注意. 拉米也属于抗逆转录病毒(HBV是逆转录病毒)药物. 拉米和水飞蓟用药都需要长期使用, 这样谁会因水飞蓟改变了的拉米生物性或药物动力受到影响呢? 用药患者的身体和肝脏.
文章还提到, 它也会改变草药的代谢和排泄.
[此贴子已经被作者于2005-10-17 5:57:01编辑过]
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