基础医学与临床 ›› 2011, Vol. 31 ›› Issue (10): 1154-1155.

• 研究短文 • 上一篇    下一篇

冷适应建立对寒冷暴露大鼠心肌的保护作用

陈玲   

  1. 南昌大学第二附属医院心内科
  • 收稿日期:2010-08-23 修回日期:2010-11-02 出版日期:2011-10-05 发布日期:2011-10-08
  • 通讯作者: 陈玲 E-mail:chenling2@medmail.com.cn
  • 基金资助:
    国家科技部基金项目

Protect of Cold Acclimation on Myocardium of Cold Exposure Rat

  • Received:2010-08-23 Revised:2010-11-02 Online:2011-10-05 Published:2011-10-08

摘要: 摘要:【目的】依据不同强度冷刺激大鼠血浆激素水平的改变建立冷适应性模型,为研究寒冷适应性保护机制奠定基础。【方法】60只SD大鼠分成3组每组20只。对照组,4℃冷刺激4h/d组,0℃冷刺激10h/d组。高效液相检测血浆儿茶酚胺,放射免疫法检测血浆皮质醇换算成皮质酮含量。观察大鼠冷适应后寒冷暴露血浆LDH,CK-MB ,心肌髓过氧化物酶(MPO)活性。【结果】不同强度冷刺激大鼠血浆糖皮质激素、儿茶酚胺的分泌水平不同组间比较(P<0.01),建立冷适应模型。冷适应处理大鼠寒冷暴露组血浆LDH、CK-MB和心肌MPO活性显著低于寒冷暴露组(P<0.05)。【结论】建立了冷适应大鼠模型,冷适应能够降低寒冷暴露所造成的心肌损伤。

关键词: 冷适应 , 冷暴露 , 激素 , 心肌损伤 , 冷适应 , 冷暴露 , 激素 , 心肌损伤

Abstract: 【Absrtact】:Objective:To establish rat model of cold acclimation by different cold exposure,and to form foundation on studying the molecule mechanisms of cold acclimation. Methods:60Sprague-Dawley rats were randomly divided into 3groups with 20 in each, control group ,4℃cold exposure 4h/d group,0℃cold exposure 10h/d group.The plasma levels of monoamine neurotransmitters were analyzed by HPLC-ECD techniques;the content of plasma corticosterone was evaluated by radioactivity immunoassay;myeloperoxidase(MPO) activity of the myocardium were measured by colorimetric method.Results:In different cold stress,plasma levels of monoamine neurotransmitters and corticosterone significantly different(P<0.05).Compared with the cold exposure group,the plasma LDH,CK-MB and myocardium MPO activities in cold acclimation rats after cold exposure were significantly decreased(P<0.05).Conclusion: cold acclimation rat model is established,and cold acclimation can attenuate the myocardial damage caused by cold exposure.

Key words: cold acclimation, cold exposure, Hormone, Myocardial damage, cold acclimation, cold exposure, Hormone, Myocardial damage

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