水飞蓟素对小鼠肝细胞微粒体及线粒体膜流动性的影响

目的 :观察水飞蓟素silymarin对小鼠肝微粒体及线粒体膜流动性的影响。 方法 :以ANS ,DPH为荧光探针标记肝微粒体及线粒体膜浅层及深层 ,测定肝微粒体及线粒体膜荧光强度 (F) ,荧光偏振度 (P)及平均微粘度 (η)。 结果 :水飞蓟素能增高肝微粒体及线粒体膜浅层流动性 ,同时能降低肝微粒体及线粒体膜深层流动性。CCl₄ 亦可导致肝微粒体及线粒体膜浅层流动性增加及肝微粒体及线粒体膜深层流动性降低 ,而给予水飞蓟素140 ,280mg·kg^-1后 ,能使增高的肝微粒体及线粒体膜浅层流动性降低 ,亦能使降低的肝微粒体及线粒体膜深层流动性增高。结论 :水飞蓟素对肝损伤的保护作用可能与水飞蓟素恢复肝微粒体及线粒体的膜流动性有关.

The Effects of Silymarin on Hepatic Microsomal and Mitochond rial Membrane Fluidity in Mice

OBJECTIVE: To observe the effects of silymarin on hepatic microsomal and mitochondrial membrane fluidity in mice. METHOD: Liver microsomal and mitochondrial membranes were labled by ANS and DPH. Membrane fluorensent intensity (F), fluorensent polarization(P) and microviscosily(eta) of liver microsome and mitochondria were determined. RESULT: Sil increased the external membrane fluidities of liver microsome and mitochondria, and decreased the internal membrane fluidities of liver microsome and mitochondria. Pretreatment with CCl4, the external membrane fluidity of liver microsome and mitochondria were increased, and the internal membrane fluidities of liver microsome and mitochondria were decreased. After given sil 140,280 mg.kg-1, the increased external membrane fluidities of liver microsome and mitochondria were lowered, and the decreased internal membrane fluidities of liver microsome and mitochondria were enhanced in a dose-dependent manner. CONCLUSION: The protective effects of sil on liver injury may be related to the recovery of the membrane fluidities of liver microsome and mitochondria.