姜黄素对大鼠肝缺血再灌注早期肝组织一氧化氮表达的影响

目的:探讨姜黄素对大鼠肝脏缺血再灌注早期损伤微循环的影响.方法:将大鼠随机分为假手术组、对照组和实验组(姜黄素40 mg/kg,2次给药).通过检测再灌注早期1、3 h血清转氨酶水平、肝组织中一氧化氮(nitricoxide,NO)、一氧化氮合酶(nitricoxide synthase,NOS),诱导型一氧化氮合酶(inducible nitricoxide synthase,iNOS)mRNA及内皮型一氧化氮合酶(endothelium nitricoxide synthase,eNOS)mRNA水平,以及肝组织病理学检查来评价姜黄素对大鼠肝脏缺血再灌注早期损伤微循环的影响.结果:相对于对照组,姜黄素可降低大鼠肝脏缺血再灌注早期损伤1、3 h血清谷丙转氨酶(ALT)的水平(603.8 U/L±64.5 U/L vs 758.1 U/L±114.7U/L,837.1 U/L±33.3 U/L vs 1012.7 U/L±119.8 U/L,均P<0.01)和谷草转氨酶(AST)的水平(605.7 U/L±65.7 U/L vs 779.5 U/L±124.3 U/L,849.6 U/L±36.0 U/L vs 1027.8 U/L±139.8 U/L,均P<0.01);改善肝组织病理学损害;减少肝脏缺血再灌注早期损伤1、3 h肝组织由iNOS产生的NO蛋白水平(0.455±0.056 vs 0.594±0.087.0.492±0.040 vs 0.671±0.079,均P<0.01);降低肝脏缺血再灌注早期损伤1、3 h肝组织iNOS mRNA的表达强度(0.426±0.075 vs 0.569±0.073,0.527±0.066vs 0.702±0.089,均P<0.01).结论:姜黄素可通过减轻肝组织中由iNOS产生的NO生成,来改善肝缺血再灌注早期损伤中微循环的紊乱,从而减少对肝缺血再灌注肝实质细胞的损伤.

Curcumin reduces hepatic nitric oxide production in earlystage ischemia/reperfusion in rats

AIM:To investigate the effects of curcumin on the microcirculation in early-stage ischemia/reperfusion injury in rats.METHODS:Wistar rats were randomized into three groups:sham-operation group,dimethyl sulfoxide (DMSO) group (treated with 1 mL of DMSO twice) and curcumin group (treated with 40 mg/kg of curcumin twice).The level of serum transaminase,the content of hepatic nitric oxide (NO),and the expression of nitric oxide synthase (NOS),inducible nitric oxide synthase (iNOS)and endothelial nitric oxide sy...