摘要
目的探讨硫化氢(H2S)对大鼠急性心肌缺血心肌的保护作用及其机制。方法将48只雄性SD大鼠随机分为假手术组、缺血组、缺血+硫氢化钠(NaHS)低、中、高剂量组和缺血+炔丙基甘氨酸(PPG)组,每组各8只。通过结扎大鼠左冠状动脉前降支建立急性心肌缺血模型。缺血组、缺血+NaHS低、中、高剂量组和缺血+PPG组分别于缺血3h时腹腔注射生理盐水,低、中、高剂量NaHS及PPG,假手术组只穿线不结扎,各组大鼠均于术后6h时处死取材。流式细胞术检测心肌细胞凋亡;免疫组织化学法检测心肌B细胞淋巴瘤/白血病-2(bcl-2)、bcl-2相关X蛋白(bax)的表达。结果缺血组心肌细胞凋亡率为(21.02±0.70)%,明显高于假手术组(9.07±1.34)%,差异有统计学意义(P〈0.01);缺m+NaHS低、中、高剂量组心肌组织细胞凋亡率分别为(18.31±1.79)%、(15.14±1.15)%、(12.034-1.14)%,明显低于缺血组(P〈0.05);缺血+PPG组心肌组织细胞凋亡率为(24.44±1.90)%,明显高于缺血组(P〈0.01)。缺血组的bax蛋白表达的吸光度(A)值为(0.135±0.009),明显高于假手术组(0.085±0.006);bcl-2蛋白表达的A值为(0.053±0.008)明显低于假手术组(0.074±0.006)(P〈0.01)。与缺血组比较,缺血+NaHS中、高剂量组bcl-2蛋白表达的A值为(0.074±0.011)、(0.084±0.011),明显升高;缺血+NaHS中、高剂量组bax蛋白表达4值(0.126±0.006)、(0.122±0.013),明显减低(P〈0.05或P〈0.01)。与缺血组比较,缺血+PPG组bcl-2蛋白表达的4值为(0.040±0.005)明显减低,bax蛋白表达A值(0.154±0.008)明显升高(P〈0.05)。结论外源性补充心S可明显抑制心肌细胞凋亡,这可能是其心肌保护作用机制之一.
Objective To investigate the cardioprotective effects and the possible mechanism of hydrogen sulfide ( H2 S) in acute myocardial isehemia in rats. Methods Fourty-eight male SD rats were randomly divided into sham operation group, ischemia group, ischemia + NariS low-, middle- and highdose groups and ischemia + DL-propargylglycine (PPG) group. Acute myocardial isehemia models were established by ligating the left anterior descending coronary artery. Saline was administrated in ischemia group. In ischemia + NariS low-, middleand high-dose groups and ischemia + PPG group, sodium hydrosulfide (NariS) or PPG was respectively injected intraperitoneally at 3rd h after ischemia, and the wire was only threaded, not ligated in the sham operation group.
出处
《中华实验外科杂志》
CAS
CSCD
北大核心
2013年第5期999-1001,共3页
Chinese Journal of Experimental Surgery
基金
基金项目:河北省自然科学基金资助项目(C2009001458)