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草鱼肾细胞中双氟沙星代谢酶的酶动学

Journal of Fisheries of China(2010)

Cited 2|Views13
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Abstract
细胞色素P450s(CYPs)主要参与动物体内药物代谢。水产养殖中不合理的联合用药常会导致治疗失败,这通常与CYP活性的诱导有关。然而,关于鱼类CYP的诱导却知之甚少。为获得有关CYP诱导的信息,实验采用反相高效液相色谱(RP-HPLC)的方法测定了草鱼肾细胞(CIK)中CYPs的特异性诱导剂对双氟沙星(DIF)的代谢作用及酶动学分析。对照组和β-萘黄酮(BNF)诱导组的酶动学方程分别为1/V=0.1375×1/[S]+0.003和1/V=0.0245×1/[S]+0.0013。DIF与经BNF处理的CIK共孵育后,其代谢量增加了1倍,酶动学参数Clint和Vmax值分别增加了7倍和2倍。BNF是CYP1A的特异性诱导剂,因此,CYP1A可能参与了DIF的代谢。
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Key words
RP-HPLC,cytochrome P450,kinetics,difloxacin,Ctenopharyngodon idellus
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