摘要
选择产前约20d的干乳期奶牛48头,分为4组,Ⅰ组为对照组,Ⅱ、Ⅲ、Ⅳ组分别每天补饲硫辛酸3、5、8g/头,连续50d,测定了血清谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性和丙二醛(MDA)含量的动态变化。结果表明,Ⅲ和Ⅳ组血清GSH-Px活性第20天开始显著或极显著高于对照组(P<0.05或P<0.01);Ⅲ和Ⅳ组血清SOD活性第30天开始降低的幅度明显低于对照组(P<0.05);Ⅱ组血清CAT活性在第30天显著高于对照组(P<0.05),Ⅲ、Ⅳ组第30～50天均显著高于对照组(P<0.05);Ⅲ组血清MDA含量在第40天、Ⅳ组在第50天显著低于对照组(P<0.05)。补充硫辛酸可明显改善围产期奶牛的抗氧化能力。
Forty-eight Holstein dairy cows at 20 dbefore calving were divided into four groups fed with α-lipoic acid （0,3,5or 8g/d）for 50 days,respectively.Serum activities of glutathione peroxidase（GSH-Px）,superoxide dismutase（SOD）and catalase（CAT）,and content of malondialdehyde（MDA）were measured.Serum GSH-Px,SOD activities were significantly higher at 20 dor 40 to 50 din groupⅢandⅣthan those of control group,respectively （P〈0.05or P〈0.01）.Serum CAT activities were significantly higher at 30 din groupⅡand 30,40 and 50 din groupⅢandⅣ when compared with control group（P〈0.05）.Serum MDA concentrations markedly reduced at 40 d in groupⅢand 50 din groupⅣ when compared with control group（P〈0.05）.The results suggest thatα-lipoic acid supplementation can improve antioxidant capacity in the transition cow.
出处
《中国兽医学报》
CAS
CSCD
北大核心
2010年第9期1253-1256,共4页
Chinese Journal of Veterinary Science
基金
江苏省高校"青蓝工程"中青年学科带头人培养对象资助项目(2006)
江苏省自然科学基金项目(BK2008214)
关键词
奶牛
围产期
硫辛酸
氧化状态
dairy cows
transition period
α-lipoic acid
oxidative status
