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The research of the protective effect of Dexamethasone on ischemia-reperfusion-induced pulmonary injury in rat
Author(s): 
Pages: 439-441
Year: Issue:  6
Journal: Journal of Nantong University(Medical sciences)

Keyword:  缺血再灌注地塞米松一氧化氮合酶大鼠;
Abstract: 目的:通过观察地塞米松对大鼠肺缺血再灌注后病理形态变化的影响,探讨其对肺缺血再灌注损伤的保护机制.方法:健康的SD大鼠40只,雌雄不拘,随机分为5组:假手术组(S)、单纯缺血组(I)、缺血再灌注组(IR)、小剂量地塞米松干预组(D1)及大剂量地塞米松干预组(D2),每组8只.根据Eppinger模型制作SD大鼠单侧肺缺血再灌注动物模型.用Western印迹法分析各实验组中一氧化氮合酶蛋白表达的变化,HE染色观察肺组织病理形态学改变结果:与其它组比较,缺血再灌注组肺组织中蛋白一氧化氮合酶表达明显增高(P<0.01),在地塞米松干预后,一氧化氮合酶蛋白下降,以D2组明显,病理切片显示IR组肺结构损害分级显著重于其它组,在地塞米松干预后,肺结构损害分级下降,以D2组明显.结论:正常肺脏一氧化氮合酶蛋白的表达微弱,缺血再灌注可使一氧化氮合酶蛋白表达增加,肺组织损伤加重,地塞米松可使一氧化氮合酶蛋白表达下降,肺组织损伤减轻,这种效应以大剂量时明显.
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