复合微量营养素对高脂血症大鼠血浆PGI2、TXA2水平的影响

目的：观察复合微量营养素（硒、维生素E、维生素C、镁）对高脂饲料诱导的高脂血症大鼠血浆前列环素I2（PGI2）和血栓素A2（TXA2）水平的影响，为营养干预防治动脉粥样硬化（AS）提供实验依据。方法：60只幼年Wistar大鼠随机分为5组，分别饲以正常饲料、高脂饲料、高脂饲料补充微量营养素硒＋维生素E＋维生素C、高脂饲料补充镁、高脂饲料补充微量营养素硒＋维生素E＋维生素C＋镁。饲养8周后测定大鼠血中脂质以及PGI2和TXA2含量。结果：复合微量营养素硒、维生素E、维生素C和镁能显著抑制高脂饲料主导的大鼠血浆甘油三酯、总胆固醇、低密度脂蛋白胆固醇以及血栓素A2升高，降低TXA2／PGI2值，同时显著升高高密度脂蛋白胆固醇。结论：复合微量营养素硒、维生素E、维生素C和镁具有明显的降血脂作用，且降脂模式非常有利于预防AS，同时能降低TXA2／PGI2值，提示具有抗血小板聚集和促血管扩张作用。

Effects of micronutrient complex on the levels of PGI2 and TXA2 in plasma of rats with hyperlipidemia

Objective To investigate the effects of micronutrients selenium(Se), vitamin E(VE), vitamin C(VC) and magnesium(Mg) on levels of TXA 2, PGI 2 in plasma of rats with hyperlipidemia induced by high fat and high cholesterol diet. Methods Sixty Wistar juvenile rats were randomly divided into five groups. Each group was fed with normal diet, high fat and high cholesterol diet (HFD), HFD+Se+VE+VC, HFD+Mg, and HFD+Se+VE+VC+Mg, respectively. After eight weeks, the rats were sacrificed for the detection of levels of lipid, TXA 2 and PGI 2 in the blood. Result Micronutrient complex (Se, VE, VC, and Mg) can significantly inhibit the increase of blood triglycerol, total cholesterol, LDL C and TXA 2 induced by HFD and can significantly increase HDL C. Conclusion Micronutrient complex (Se, VE, VC, and Mg) has the lipid lowering effect and can decrease TXA 2/PGI 2 ratio, which is beneficial to the prevention of atherosclerosis.