食品科学 ›› 2006, Vol. 27 ›› Issue (12): 706-709.

• 营养卫生 • 上一篇    下一篇

外源核苷酸对小鼠消化道抗氧化作用的影响

施用晖,李石营,钱佳,代卉,乐国伟   

  1. 教育部食品科学与安全重点实验室; 江南大学食品学院食品营养与安全研究所;
  • 出版日期:2006-12-15 发布日期:2011-11-23

Effect of Dietary Nucleotides on the Intestinal Antioxidation of Mice

SHI Yong-hui,LI Shi-ying,QIAN Jia,DAI Hui,LE Guo-wei   

  1. 1.Key Laboratory of Food Science and Security, Ministry of Education, Southern Yangtze University, Wuxi 214036, China;2.Institute of Food Nutrition and Saftey, School of Food Science and Technology, Southern Yangtze University, Wuxi 214036, China
  • Online:2006-12-15 Published:2011-11-23

摘要: 目的:研究断奶小鼠在受到微生物刺激时,日粮核苷酸的抗氧化作用,并探讨其可能机制。方法:用脂多糖(LPS)构建氧化应激模型,检测外源核苷酸对小肠组织中谷胱甘肽(GSH)、超氧化歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)、一氧化氮(NO)、丙二醛(MDA)、丙氨酸氨基转移酶(ALT)以及髓过氧化物酶(MPO)的变化。结果:在LPS刺激后的4h和18h,日粮核苷酸均能升高肝脏和小肠组织的GSH水平和SOD、GSH-PX活性,降低肠道MDA、MPO含量以及血清ALT。结论:日粮核苷酸有助于增强氧化应激小鼠的抗氧化能力,降低组织NO含量与NO合成酶活性,保护机体免受氧化损伤,外源核苷酸可以减少核苷酸从头合成时与GSH争夺前体物质,增加了GSH水平,进一步增加了SOD、GSH-PX等抗氧化酶的活性。

关键词: 核苷酸, LPS, GSH, SOD, GSH-PX, MDA, ALT, MPO

Abstract: Objective: To study the effects of dietary nucleotides on anti-oxidation and its mechanism on newly weaned mice under stimulation. Method: To determine changes on hepatic and intestinal glutathione (GSH), superoxide dismutase(SOD), glutathione peroxidase(GSH-PX), malondialdehyde(MDA),alanine aminotransferase(ALT)and myeloperoxidase(MPO)by nucleotides free (NF) and nucleotides (NT) diet mice under lipopolysaccharide (LPS) induced oxidative response. Results: Hepatic and intestinal GSH, SOD, GSH-PX increased and MDA decreased with nucleotides supplement 4 and 18 hours after LPS stimulation. Conclusion: Dietary nucleotides can help to increase anti-oxidation, protect mice from injury under LPS stimulation. The mechanism might involve in dietary nucleotides saving glycin, glutamine and energy, which increase GSH and further increase SOD, GSH-PX activity.

Key words: nucleotides, lipopolysaccharide(LPS), glutathione(GSH), superoxide dismutase(SOD), glutathione peroxidase(GSH-PX), malondialdehyde(MDA), alanine aminotransferase(ALT), myeloperoxidase(MPO)