前列腺素E_1(PGE_1)预适应对AMI大鼠模型心脏功能的保护作用  

Pretreatment with Prostaglandin E_1 to Protect Cardiac Function of AMI Rat Model

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作  者:李方[1] 孙哲[1] 王志新[2] 郭涛[3] 吴会芳[3,4] 李琮宇[5] 

机构地区:[1]郑州大学第五附属医院,郑州450052 [2]河南大学医学院神经生物研究所,开封475100 [3]河南省食管癌重点开放实验室,郑州大学基础医学院,郑州450052 [4]郑州大学第二附属医院病理科,郑州450052 [5]河南省肿瘤医院,郑州450008

出  处:《中国医药导刊》2008年第5期727-728,730,共3页Chinese Journal of Medicinal Guide

摘  要:目的:研究前列腺素 E_1(PGE_1)预处理对急性心肌梗死大鼠心脏功能及病理改变的影响。方法:将大鼠分为6组:正常对照组(C 组)、急性心肌梗死模型对照组(M 组)、小剂量 PGE_1(25μg·kg^(-1))预处理早期保护作用组(LE 组)及延迟保护作用组(LD 组)、大剂量 PGE_1(150μg·kg^(-1))预处理早期保护作用组(HE 组)及延迟保护作用组(HD 组)。各组均经静脉分别给与等容积生理盐水及不同剂量的 PGE_1对大鼠进行预处理。除 C 组外其余各组分别于预处理后20min 和24h 腹腔注射(ip)异丙肾上腺素(Isop)造成急性心肌梗死。Ip 以及 Isop 24h 后测定左室内压及其微分,测定并计算心电图Ⅱ导联,并对心肌进行病理学检查。结果:模型对照组左室内压的最大上升速率(+dp/dt max)、最大下降速率(-dp/dt max)和左室发展压(LVDP)均降至正常对照组的30%左右(P<0.01),而 PGE_1预处理各组此三项指标均较模型组显著改善(P<0.01);模型对照组 J/R比值剧烈上升,(与正常对照组比 P<0.01),PGE_1预处理各组该比值均显著下降(P<0.01);模型对照组出现较严重的心肌梗死病理改变,PGE_1预处理各组心肌坏死程度均有不同程度的减轻。结论:PGE_1预处理具有保护急性心肌梗死后的心脏功能,减轻心肌损伤及坏死病理改变的作用。Objective: In order to investigate the effects of pretreatment with prostaglandin E1 (PGE1) on cardiac function an, pathological change of acute myocardial infarction in rats. Methods: PGE1 (25, 150· μg ·kg^-1 )was administered intravenously 20min or24h before the administration of isoproterenol (Isup) (80mg ·kg^-1· ip). 24h after the injection of Isop, ECG lead Ⅱ was recorded, inner left ventricular pressure and its differentiation were measured, and hearts were then removed immediately fo: pathological examination. Results: Isop caused serious necrosis in group M. Both ± dp/dt max of left ventricular pressure and left ventricular deveIuped pressure (LVDP) were about 30% of these in control group (P 〈0. 01 ). The J/R ratio in lead Ⅱ was mucl hngher than in control group (P 〈 0. 01 ). Pretreatment with PGE1 significantly inproved + dp/dt max and LVDP ( P 〈 0. 01 ), lowered J/R ratio (P 〈 0. 01 ) and attenuated the pathological changes of myocardium compared to group M. Conclusion: Pretreatment with PGE1 can protect cardiac function, improve ECG manifestation, and attenuate pathological changes of acute myocardial infarction.

关 键 词:前列腺素E1 预适应 异丙肾上腺素 急性心肌梗死 

分 类 号:R96[医药卫生—药理学] R542.22[医药卫生—药学]

 

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