摘要
目的 :探讨高果糖饮食对Wistar大鼠外周血白细胞iNOSmRNA与ecNOSmRNA表达的影响。方法 :普通饲料喂养 ,实验组饮用 1 2 %的果糖水造型。于实验前、实验过程中 1 - 6个月每月断尾取血 ,测定外周血白细胞诱导型一氧化氮合酶mRNA(iNOSmRNA)与内皮源型一氧化氮合酶mRNA (ecNOSmRNA)表达 ;观察实验前、造型 1、2、3及 6个月时的空腹血糖、血浆胰岛素水平变化。结果 :1个月后 ,血糖与实验前无显著差异 ;血浆胰岛素明显高于对照组 (P <0 0 1 ) ,并持续维持在高水平上 ;外周血白细胞ecNOSmRNA表达增强。 2个月后血糖高于对照组 (P <0 0 5) ;外周血白细胞出现iNOSmRNA表达。 3及 6个月 ,血糖明显高于对照组 (P <0 0 1 ) ;iNOSmRNA与ecNOSmR NA持续保持高表达状态。结论 :高果糖饮食两个月 ,可引起Wistar大鼠产生明显的高胰岛素血症和胰岛素抵抗 ;首先ecNOSmRNA表达增强 ,可能延缓胰岛素抵抗的形成。继之 ,iNOSmRNA表达增强 。
AIM: To study the alteration of expression of iNOS mRNA and ecNOS mRNA in peripheral leukocytes of Wistar rats fed with fructose. METHODS: Wistar rats were randomly divided into the control group ( n =10) and the fructose feeding group( n =10). The fructose feeding group drank 12% fructose water for 6 months. The blood glucose, blood insulin, and the expression of iNOS mRNA and ecNOS mRNA in peripheral leukocytes of rats were determined. RESULTS: The levels of blood insulin ( P< 0.01) and the expression of ecNOS mRNA were higher in fructose feeding group than that in control group after 1 month. The level of blood insulin( P< 0.01), the level of blood glucose ( P< 0.05), the expression of ecNOS mRNA and the iNOS mRNA were also higher in fructose feeding group than that in control group after 2 months. The levels of blood insulin and glucose, the expression of ecNOS mRNA and the iNOS mRNA were increased persistently during 3 to 6 months. CONCLUSIONS: These results indicate that fructose can increase the level, but reduce the sensitivity of insulin. It can also induce the expression of ecNOS mRNA firstly and the expression of iNOS mRNA secondly, the former can delay the formation of insulin resistance and the later can accelerate the formation of insulin resistance.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2002年第11期1404-1406,I004,共4页
Chinese Journal of Pathophysiology
基金
山东省卫生厅资助项目 (99CA1CAA1 1 )
