促红细胞生成素对心肺复苏后心肌功能的影响  被引量:5

The myocardium protective effects of erythropoietin (EPO) in a rat model of asphyxia-induced cardiac arrest/cardiopulmonary resuscitation (CPR)

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作  者:江慧琳[1] 朱永城[1] 陈晓辉[1] 林珮仪[1] 王华军[1] 

机构地区:[1]广州医学院第二附属医院急诊科,广东,510260

出  处:《中国危重病急救医学》2011年第10期608-612,共5页Chinese Critical Care Medicine

基  金:广东省医学科研基金立项课题

摘  要:目的探讨促红细胞生成素(EP0)对窒息性心搏骤停大鼠心肺复苏(cPR)后心功能不全的心肌保护作用。方法经夹闭气管8min建立窒息性心搏骤停一CPR动物模型。按随机数字表法将24只SD大鼠分为3组,每组8只。CPR组窒息致心搏骤停后8min予胸外按压和机械通气进行复苏;EP0组于自主循环恢复(ROSC)后3min股静脉注射EP05kU/kg;正常对照组不予任何处理。持续监测左心室收缩压(LVSP)、左心室舒张期末压(LVEDP)、左心室内压上升或下降最大速率(+dp/dtmax)等血流动力学指标。于观察终点(ROSC后120min)处死大鼠,采血测定血清心肌肌钙蛋白I(cTnI)含量;光镜和透射电镜下观察心肌组织病理改变;原位末端缺刻标记法(TUNEL)检测心肌细胞凋亡。结果CPR组和EPO组ROSC后30、60、90、120min时LVSP、+dp/dtmax和-dp/dtmax绝对值均较基线水平明显下降。与正常对照组比较,CPR组和EPO组ROSC30min时LVSP(mmHg,1mmHg=0.133kPa)、+dp/dtmax(mmHg/s)、dp/dtmax绝对值(mmHg/s)即明显下降(LVSP:119.52±12.68、134.32±15.78比165.82±7.05;+dp/dtmax:4457.14±826.22、6019.85±1192.19比10325.93±773.09;-dp/dtmax:-3956.04±952.37、4957.22±838.60比8421.33±886.65,均P〈0.01),并持续至ROSc120min(LVSP:124.62±8.07、145.61±16.70比162.34±7.63;+dp/dtmax:4977.67±350.40、7471.62±998.32比9999.39±727.96;-dp/dtmax:-4145.51±729.77、-5895.64±787.30比-8089.75±981.52,均P〈0.01);经EPO处理后ROSC各时间点LVSP、+dp/dtmax和-dp/dtmax绝对值均较CPR组显著升高(均P〈0.05)。CPR组和EPO组ROSC120minLVEDP(mmHg/s)均较正常对照组明显升高(22.94±3.94、11.18±2.58比2.89±0.70,均P〈0.01),EPO组LVEDP则较CPR组明显下降徊〈0.05)。光镜和电镜下观察,CPR组心肌细胞Objective To examine the effects of EPO administration on the integrity of myocardium in a rat model of asphyxia-induced cardiac arrest/CPR. Methods 24 male Sprague-Dawley (SD) rats were randomly divided into three groups (8 each) to receive (1) cardiac arrest (induced by tracheal catheter clamping for 8 minutes)/CPR (by chest compressions and mechanical ventilation 8 minutes after cardiac arrest), (2) cardiac arrest/CPR5+EPO (5 kU/kg, i. v, 3 minutes after restoration of spontaneous circulation (ROSC), and (3) no-treatment (control). The left ventricular systolic pressure (LVSP), left ventricular end-diastolic pressure (LVEDP), and maximal positive/negative filling pressure change versus time (5=dp/dt max) in the animals were recorded 30, 60, 90, and 120 minutes after ROSC. Blood and heart tissue samples were collected 120 minutes after ROSC for the examination of serum troponin I (cTnI) level, myocardium pathological change (by light/electronic microscopy), and myocardium apoptosis [by terminal deoxynucleotidyl transferase mediated dUTP-biotin nick endlabeling (TUNEL) staining]. Results The LVSP, +dp/dt max and -dp/dt max absolute value in CPR group and EPO group were significantly lower than that of baseline at 30, 60, 90, 120 minutes after ROCS. In comparision with the control group, the LVSP (mm Hg, 1 mm Hg = 0. 133 kPa : 119.52 ± 12.68, 134.32 5= 15.78 vs. 165.82 ± 7.05), + dp/dt max (ram Hg/sec: 4 457.14 5= 826.22, 6 019.85 5= 1 192.19 vs. 10 325.93 ± 773.09), and -dp/dt max (mm Hg/sec: 3 956.045=952.37, -4 957.225=838.60 vs. -8 421.335=886.65) were significant lower (all P〈0.01) in the CPR and EPO group 30 minutes after ROSC, and such tendency remained till 120 minutes after ROSC: (LVSP: 124.62 ± 8.07, 145.61 5= 16.70 vs. 162.34 ±7.63; 5= dp/dt max.. 4 977.67±350.40, 7 471.62 5= 998.32 vs. 9 999.39 5= 727.96; - dp/dt max: 4 145.51 51± 729.77,-5 895.64±787.30 vs. -8 089.75 ± 981.52). Compared to t

关 键 词:促红细胞生成素 心搏骤停 缺血/再灌注损伤 心肌 心功能不全 心肺复苏 

分 类 号:R459.7[医药卫生—急诊医学]

 

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