四氢喋呤对兔缺血再灌注损伤内皮功能的保护作用Restoration of endothelial function after reperfusio injury by tetrahydrobiopterin
田建会,李珊,刘承军
摘要(Abstract)：
目的 研究四氢喋呤 (BH4 )对兔实验性缺血再灌注 (MI R)损伤中一氧化氮 (NO)、丙二醛 (MDA)、超氧化物歧化酶 (SOD)水平及心肌梗死面积的影响。方法 2 4只新西兰兔随机分为假手术组、模型组和药物干预组 3组。制备MI R模型 ,观察BH4 预处理后MI R损伤中NO、MDA、SOD水平的变化及对心肌梗死面积的影响。结果 模型组较假手术组NO显著减低 [(2 8± 10 ) μmol L比(116± 17) μmol L ,P <0 0 1],MDA水平明显升高 [(5 8 3± 10 4 )nmol L比 (7 0± 1 8)nmol L ,P <0 0 1],SOD活性明显减低 [(2 6 8± 17)nu ml比 (340± 2 4 )nu ml,P <0 0 5 ];而BH4 预处理组较模型组NO明显升高 [(6 2± 17) μmol L比 (2 8± 10 ) μmol L ,P <0 0 1],MDA明显减低 [(30 9± 6 1)nmol L比(5 8 3± 10 4 )nmol L ,P <0 0 1],SOD活性无明显改变 [(2 88± 2 0 )nu ml比 (2 6 8± 17)nu ml,P >0 0 5 ];BH4 预处理组和模型组心肌梗死面积差异有显著性 [(18± 4 ) %比 (16± 4 ) % ,P <0 0 5 )。结论 MI R导致内皮功能紊乱。BH4 对内皮功能有保护作用 ,从而减轻再灌注损伤。
关键词(KeyWords)： 四氢喋呤;再灌注损伤;一氧化氮
基金项目(Foundation):
作者(Author): 田建会,李珊,刘承军
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