摘要
目的比较迷走神经电刺激后处理(postconditioningwi山vagusnerveelectricalstimulation,POES)和肢体远隔缺血后处理(1imbremoteischemicpostconditioning,LRIPOC)对大鼠心肌缺血,再灌注损伤(ischemia/reperfusioninjury,I/RI)中炎症反应的影响。方法雄性sD大鼠80只,体重290g-320g,采用随机数字表法分为4组(每组20只):假手术组(s组)、缺血,再灌注(isehemia/reperfusion,I/R)组、POES组和LRIPOC组。监测I/R期间的心率(heartrate,HR)和平均动脉压meanarteryperssure,MAP),并计算HR和收缩压乘积(ratepressureproduct,RPP)作为心肌氧耗指数。各组随机取10只大鼠,于再灌注30、60min和120min时采集颈动脉血样,采用酶联免疫吸附测定法(enzyme-linkedimmunosorbentassay,ELISA)检测血清心肌肌钙蛋白I(cardiactroponinI,cTnI)、肌酸激酶心肌型同工酶(myocardial-boundcreatinekinase,CK-MB)、肿瘤坏死因子-d(tumornecrosisfactor-a,TNF-a)、高迁移率组蛋白1(highmobilitygroupbox1protein,HMGB.1)、细胞间黏附分子1(intercellularadhesionmolecule-1,ICAM-1)、白介素(interleukin,IL)-1、IL-6和IL-10的浓度;于再灌注120min颈动脉采血后,采用伊文蓝和氯化三苯基四氮唑双重染色法测定心肌梗死体积。各组随机取10只大鼠,于再灌注120min处死后分别取缺血区和非缺血区心肌组织,采用ELISA法检测心肌TNF-a、HMGB-1、ICAM-1、IL-1、IL-6和IL-10的含量。结果S组、I/R组、POES组和LRIPOC组的心肌梗死体积分别为O%、(72±9)%、(46±12)%和(57±9)%,血清crrnI浓度分别为(0.29±0.06)、(0.99±0.14)、(0.40±0.08)μg/L和(0.54±0.07)μg/L。与I/R组比较,POES组和LRIPOC组的心肌梗死体积、血清cTnI和CK-MB浓度,再灌注30min和60min时血清TNF啵浓度,再灌注120min时血清、缺血区与非缺血区心肌组织内TNF咄、HMGBq、ICAM-1、IL-1和IL-6的含量均显著降低,而POES组缺血区与非缺血区心肌组织内IL-10的含量则显著升高。与POES组比较,LRIPOC组的心肌梗死体积和血清cTnI浓度,再灌注60min时血清TNF电浓度、再灌注120min时血清HMGB-1、ICAM-1、IL-1和IL-6的浓度,缺血区心肌组织内ICAM-1、IL-1和IL-6含量,非缺血区心肌组织内HMGB-1、ICAM-1、IL-1和IL-6含量均显著升高,而缺血区心肌组织内IL-10的含量则显著降低。结论POES减轻大鼠心肌I/RI中炎症反应的作用强于LRIPOC,这可能是POES对心肌I/RI保护作用强于LRIPOC的原因之一。
Objective To compare the effects of vagus nerve electrical stimulation postconditioning with limb remote ischemia postconditioning on inflammatory response during myocardial ischemia/reperfusion (I/R) in rat in vivo. Methods Eighty male Sprague-Dawley rats weighing 290 g-320 g were randomly allocated into four groups (n=20): sham (S) group, I/R group, postconditioning with vagus nerve electrical stimulation (POES) group and limb remote ischemia postconditioning (LRIPOC) group. In the groups other than the sham group, the myocardial ischemia reperfusion model was preparated by ligation of left anterior descending coronary artery for 30 min, followed by 120 min of reperfusion. During process of ischemia and reperfusion, heart rate
出处
《国际麻醉学与复苏杂志》
CAS
2014年第2期110-115,共6页
International Journal of Anesthesiology and Resuscitation
基金
北京协和医学院协和青年科研基金和国家自然科学基金面上资助项目(81170128)