HOE642对心肌缺血再灌注损伤及细胞凋亡的影响  

Effect of HOE642 on myocardial ischemia/reperfusion injury and apoptosis

作　　者：张芸[1] 张芙荣[1] 陈君柱[1] 夏强[2] 

机构地区：[1]浙江大学医学院附属第一医院心内科,浙江杭州310003 [2]浙江大学医学院生理教研室,浙江杭州310031

出　　处：《中国病理生理杂志》2002年第1期36-39,共4页Chinese Journal of Pathophysiology

摘　　要：目的 :探讨HOE6 42对缺血再灌注心肌的保护作用 ,其作用与给药时间的关系及其对缺血再灌注导致的细胞凋亡的影响。方法 :以离体大鼠心脏缺血再灌注为模型 ,随机分成A、B两组 ,A组分缺血 /复灌 (I/R)、缺血前给药 (HOE -Pr+I/R)、缺血期间给药 (HOE -Is+I/R)、复灌期给药 (HOE -Re+I/R)组 ,测定左室发展压、左室舒张末压、心律失常、心率、冠脉流量和心肌酶。B组分对照、I/R和HOE6 42 +I/R组 ,TUNEL法检测细胞凋亡。结果 :HOE -Pr+I/R组在缺血复灌期间左室发展压明显高于I/R组 ,左室舒张末压、各时段心律失常评分低于I/R组 ,冠脉流出液心肌酶的含量也低于I/R组。HOE -Is+I/R组左室舒张末压、心律失常评分、冠脉流出液心肌酶的水平低于I/R组 ,左室发展压与I/R组比无明显差异。HOE6 42 +I/R组的TUNEL阳性细胞数量显著低于I/R对照组 (11 5± 5 7vs 5 1 8± 15 2 )。结论 :HOE6 42对缺血再灌注心肌有保护作用 ,保护作用与给药时间有关 ,缺血前给药能充分发挥其心肌保护作用 ,抑制心肌细胞凋亡可能是其心肌保护作用机制之一。AIM: To clarify the effect of the specific sodium-hydrogen antiporter HOE642 on ischemia/reperfusion(I/R) injury including apoptosis, and the relationship between its effect and the time of HOE642 administration. METHODS: The isolated rat heart model were randomly divided into group A and B. Furthermore, the rat hearts in group A were divided into four subgroups including I/R, HOE-Pr+I/R, HOE-Is+I/R and HOE-Re, also the rat hearts in group B were divided into the following subgroups including control, I/R and HOE642+I/R. The LVDP, LVEDP, arrythmia coronary flow and the enzymatic activity in myocardium were measured in group A, and TUNEL method was applied to probe apoptosis in group B. RESLUTS: It was found that the LVEDP, arrythmias and the enzymatic activity including CK-MB and LDH were significantly lower in group HOE-Pr+I/R than that in group I/R, while the LVDP was obviously higher in HOE-Pr+I/R than that in I/R. The administration of HOE642 during ischemia could decrease LVEDP, arrythmias and enzymatic activity in myocardium, but not the LVDP. Furthermore, the results showed that HOE642 could inhibit apoptosis induced by ischemic/reperfusion injury. CONCLUSIONS: HOE642 is an effective cardio-protector in case of ischemic/reperfusion injury especially when it is applied before ischemia. The inhibition of apoptosis might be involved in the mechanisms underlying the protective effect of HOE642.

关 键 词：钠氢交换体 心肌再灌注损伤 局部缺血 细胞凋亡 HOE642 

分 类 号：R972.3[医药卫生—药品] R542.2[医药卫生—药学]