酪蛋白酶解物对小鼠抗氧化酶活性的影响

目的:研究不同剂量酪蛋白酶解物对小鼠血液和肝脏抗氧化功能的影响。方法:50只昆明系小鼠,雌雄各半,分为5组:正常对照组(C),VE组(VE),酪蛋白酶解液低剂量组(CH1),酪蛋白酶解液中剂量组(CH2),酪蛋白酶解液高剂量组(CH3)。C组每天灌胃0.25ml生理盐水,VE组灌胃等体积VE(7.2mg/ml),CH1、CH2和CH3组灌胃等体积酪蛋白酶解液(浓度依次为4、12和20mg/ml),各组连续灌胃10d后,处死小鼠,检测肝脏和血浆超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)活性以及丙二醛(MDA)含量。结果:不同剂量的酪蛋白酶解物均能提高小鼠血浆SOD和GSH-PX活性,同时降低血浆和肝脏MDA浓度,高剂量的酪蛋白酶解物能提高肝脏GSH-PX活性。结论:酪蛋白酶解物可增强小鼠的抗氧化作用,尤以高剂量组效果最好。

EFFECTS OF HYDROLYSED CASEIN ON ANTIOXIDATIVE ENZYMES IN MICE

Objective: To study the effects of hydrolysed casein in different doses on plasma and liver antioxidant capacities in mice. Methods: Fifty mice were divided into 5 groups: control group, vitamin E group (VE), low dose of hydrolysed casein group (CH1), medium dose of hydrolysed casein group(CH2)and high dose of hydrolysed casein group(CH3). The mice were supplemented with 0.25ml normal saline,7.2 mg/ml Vitamin E,4,12 and 20 mg/ml hydrolysed casein respectively by gavage one time a day. The mice were euthanatized after ten days. The activities of SOD, GSH-PX and the level of MDA were determined. Results: Hydrolysed casein in different dosese vidently increased the activities of SOD and GSH-Px in serum, and reduced the level of MDA in serum and liver of mice; group CH3 significantly increased the activities of GSH-Px in liver. Conclusion: Different doses of hydrolysed casein could raise plasma and liver antioxidant capacities in mice, especially the high dose of hydrolysed casein.