南方医科大学学报 ›› 2012, Vol. 32 ›› Issue (12): 1708-.

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阿托伐他汀对老年大鼠多器官内皮型一氧化氮合酶的影响及其在心肌缺血再灌注中的作用

张今尧,王浩,叶平   

  • 出版日期:2012-12-20 发布日期:2012-12-20

Effect of atorvastatin on eNOS synthesis in organs of aging rats with myocardial ischemia-reperfusion

  • Online:2012-12-20 Published:2012-12-20

摘要: 目的观察阿托伐他汀对多器官内皮型一氧化氮合酶(eNOS)合成及eNOS mRNA表达的影响,探讨阿托伐他汀在心肌缺
血再灌注过程中对多器官保护作用的可能机制。方法20月龄Wistar大鼠应用阿托伐他汀灌胃至24月龄,采用结扎冠状动脉
方法建立心肌缺血再灌注模型,并设立未用药未手术组、未用药手术组、用药未手术组及用药手术组。应用Western blot方法检
测eNOS在各组大鼠心、肝、肾组织的含量,应用RT-PCR方法检测eNOS mRNA的表达情况。同批次同处理24月龄大鼠,分为
大剂量他汀组、小剂量他汀组并老年对照组。采用同上方法检测eNOS在各组大鼠心、肝、肾组织的含量,应用Western blot方法
检测eNOS在各组大鼠心、肝、肾组织的含量,应用RT-PCR方法检测eNOS mRNA的表达情况。结果阿托伐他汀能显著提高
老年大鼠心、肝、肾器官内eNOS合成(P<0.05)及eNOS mRNA的表达(P<0.05),且与心肌缺血再灌注无关。引入药物剂量分组
后,与老年对照组相比,他汀组eNOS合成及eNOS mRNA的表达显著增加(P<0.05);其中,大剂量他汀组较小剂量他汀组增加
更为显著(P<0.05)。结论阿托伐他汀可使老年大鼠多器官内eNOS合成及eNOS mRNA的表达增加,部分解释了阿托伐他汀
在心肌缺血再灌注过程中对多器官功能的保护作用。

Abstract: ObjectiveTo observe the effect of atorvastatin on eNOS synthesis in the vital organs of aging rats and explore its
mechanism for protection against myocardial ischemia-reperfusion injury.MethodsTwenty-month-old Wistar rats were given
daily atorvastatin lavage for4months. Myocardial ischemia-reperfusion model was established by ligating the coronary artery.
The rats were randomized into normal control group, untreated model group, medication without surgery group, and
atorvastatin-treated surgical group. The content of eNOS in the heart, liver and kidneys was detected by Western bloting, and
eNOS mRNA expression by RT-PCR. The effects of different doses of atorvastatin on eNOS expressions were also evaluated.
ResultsAtorvastatin significantly promoted eNOS synthesis in the heart, liver and kidney of the rats (P<0.05) regardless of
myocardial ischemia-reperfusion. A higher dose of atorvastatin caused a more obvious increase of eNOS protein and mRNA
expression in the vital organs of the aging rats (P<0.05). ConclusionAtorvastatin can increase eNOS synthesis in the vital
organs of aging rats, which partially explains the organ-protective effect of atorvastatin against myocardial ischemia-reperfusion.