雌激素对肾血管性高血压大鼠心脏功能及氧化应激的影响Effect of estrogen on cardiac function and oxidative stress in renovascular hypertensive rats
马虎;阿迪力·阿不都热合曼;秦浩;努尔乎玛尔·库尔班;邬利娅·伊明;艾尼瓦尔·吾买尔;
摘要(Abstract):
目的探讨雌激素对肾血管性高血压大鼠心脏功能及氧化应激的影响。方法取10周龄SD大鼠,狭窄一侧肾动脉建立肾血管性高血压(2KIC)模型,雌性大鼠去除双侧卵巢建立雌激素低下模型(VOX),分为2K1C雌性组(2KIC-F组)、2K1C雌性去势组(2K1C-VOX组)和2K1C雄性组(2K1C-M组)。于手术后16w进行超声心动图检查和心脏血流动力学检查,评价雌激素对肾血管性高血压大鼠心脏结构和功能的影响;取心脏组织液氮冻存,测定心肌组织中超氧化物歧化酶(SOD)、丙二醛(MDA)、总抗氧化能力(T-AOC)及抗超氧阴离子(抗O-2)。结果超声心动图结果显示,与2KIC-F组比较,2KIC-VOX组左心室收缩末期内径(LVIDd)、左心室舒张末期后壁厚度(LVPWd)显著降低,2KIC-M组LVPWd显著升高(P<0.05)。血流动力学结果显示,与2KIC-F组比较,2KIC-VOX组和2KIC-M组收缩压(SBP)、舒张压(DBP)均有明显降低,2KIC-VOX组和2KIC-M组差异无统计学意义;2KIC-M组室内压最大上升速率(+dp/dtmax)、室内压最大下降速率(-dp/dtmin)均显著降低;与2KIC-VOX组比较,2KIC-M组-dp/dtmin显著降低(P<0.05)。氧化应激结果显示,与2KIC-F组比较,2KICVOX组心脏组织SOD的活性升高,MDA含量降低;2KIC-M组SOD的活性、T-AOC及抑制阴离子水平升高,MDA含量降低;与2KIC-VOX组比较,2KIC-M组T-AOC、抗O~-_2、MDA水平显著增高(P<0.05)。结论雌激素可加重肾血管性高血压的严重程度和氧化应激水平,雌激素低下时,其严重程度得以改善。
关键词(KeyWords): 雌激素;肾血管性高血压大鼠;血流动力学;氧化应激
基金项目(Foundation): 国家自然科学基金(81360048);; 新疆医科大学创新基金(XJC201111)
作者(Author): 马虎;阿迪力·阿不都热合曼;秦浩;努尔乎玛尔·库尔班;邬利娅·伊明;艾尼瓦尔·吾买尔;
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