山东体育学院学报
山東體育學院學報
산동체육학원학보
Journal of Shandong Institute Of Physical Education And Sports
2012年
1期
57~61
,共null页
2型糖尿病 游泳训练 肠系膜动脉 舒张功能 PI-3K Akt eNOS
2型糖尿病 遊泳訓練 腸繫膜動脈 舒張功能 PI-3K Akt eNOS
2형당뇨병 유영훈련 장계막동맥 서장공능 PI-3K Akt eNOS
Type 2 diabetes; swimming training; mesenteric artery; diastolic function; PI-3K; Akt; eNOS
目的:通过建立wistar大鼠Ⅱ型糖尿病动物模型,观察Ⅱ型糖尿病(T2DM)模型大鼠,经游泳训练后肠系膜动脉舒张功能的变化,并探讨其内在影响机制。方法:实验材料wistar大鼠60只,造模完成后随机分成3组:正常对照组(CON),Diabetes模型组(DI),游泳运动组(SEX),每组15只。进行游泳训练共计8周。结果:T2DM可造成肠系膜动脉血管舒张功能降低(P〈0.05),且存在内皮依赖性。舒张功能的降低与eNOS-NO系统活性降低直接相关。游泳训练可有效维持内皮依赖性舒张功能(P〈0.05),其上调eNOS-NO系统。另外,T2DM造成的eNOS-NO系统活性降低与该系统上游蛋白PI-3K,Akt降低有关,且在加入上游蛋白抑制剂(PI-3K)LY294002及eNOS阻断剂L-NAME后保护效应消失。结论:游泳训练能改善T2DM wistar大鼠肠系膜舒动脉舒张功。其内在保护作用可能是通过部分激活PI-3K-Akt-eNOS信号通路而实现。
目的:通過建立wistar大鼠Ⅱ型糖尿病動物模型,觀察Ⅱ型糖尿病(T2DM)模型大鼠,經遊泳訓練後腸繫膜動脈舒張功能的變化,併探討其內在影響機製。方法:實驗材料wistar大鼠60隻,造模完成後隨機分成3組:正常對照組(CON),Diabetes模型組(DI),遊泳運動組(SEX),每組15隻。進行遊泳訓練共計8週。結果:T2DM可造成腸繫膜動脈血管舒張功能降低(P〈0.05),且存在內皮依賴性。舒張功能的降低與eNOS-NO繫統活性降低直接相關。遊泳訓練可有效維持內皮依賴性舒張功能(P〈0.05),其上調eNOS-NO繫統。另外,T2DM造成的eNOS-NO繫統活性降低與該繫統上遊蛋白PI-3K,Akt降低有關,且在加入上遊蛋白抑製劑(PI-3K)LY294002及eNOS阻斷劑L-NAME後保護效應消失。結論:遊泳訓練能改善T2DM wistar大鼠腸繫膜舒動脈舒張功。其內在保護作用可能是通過部分激活PI-3K-Akt-eNOS信號通路而實現。
목적:통과건립wistar대서Ⅱ형당뇨병동물모형,관찰Ⅱ형당뇨병(T2DM)모형대서,경유영훈련후장계막동맥서장공능적변화,병탐토기내재영향궤제。방법:실험재료wistar대서60지,조모완성후수궤분성3조:정상대조조(CON),Diabetes모형조(DI),유영운동조(SEX),매조15지。진행유영훈련공계8주。결과:T2DM가조성장계막동맥혈관서장공능강저(P〈0.05),차존재내피의뢰성。서장공능적강저여eNOS-NO계통활성강저직접상관。유영훈련가유효유지내피의뢰성서장공능(P〈0.05),기상조eNOS-NO계통。령외,T2DM조성적eNOS-NO계통활성강저여해계통상유단백PI-3K,Akt강저유관,차재가입상유단백억제제(PI-3K)LY294002급eNOS조단제L-NAME후보호효응소실。결론:유영훈련능개선T2DM wistar대서장계막서동맥서장공。기내재보호작용가능시통과부분격활PI-3K-Akt-eNOS신호통로이실현。
Objective:Through the establishment of wistar rats Ⅱ diabetes animal model,we observed mesenteric artery diastolic function changes of type 2 diabetes(T2DM) in rats intervened with swimming training,to explore the impact of its internal mechanism.Method:After the model was established,60 wistar rats were random divided into three groups:1) normal control group(CON);2)diabetes model group(DI);3) swimming exercise group(SEX),n = 15.Swimming training duration was total of 8 weeks.Results:T2DM reduced mesenteric artery diastolic dysfunction(P0.05),which was endothelium-dependent.This change was connected with reduced eNOS-NO system activities.Swimming training can effectively maintain the endothelium-dependent vasodilatation(P0.05) and can increase eNOS-NO system.In addition,T2DM caused activity decreasing of eNOS-NO system,which was the same to upstream protein PI-3K,Akt.Furthermore,after adding protein inhibitor(PI-3K) LY294002 and eNOS inhibitor L-NAME,protective effect disappeared.Conclusion:Swimming training can improve mesenteric artery diastolic function of T2DM wistar.Its protective effect may be inherent in part through the activation of PI-3K-AkteNOS signaling pathway.