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中国临床药理学与治疗学 ›› 2008, Vol. 13 ›› Issue (2): 164-168.

• 基础研究 • 上一篇    下一篇

阿片受体激活对培养心肌细胞缺氧/复氧损伤的保护作用

李炯   

  1. 滨州医学院卫生管理学院, 烟台 264003, 山东
  • 收稿日期:2007-10-29 修回日期:2008-01-17 出版日期:2008-02-26 发布日期:2020-10-14
  • 作者简介:李炯, 男, 本科, 助教, 研究方向:心血管研究。Tel:15898966612 E-mail:muyifengyu@163.com

Protective effects of delta-opioid receptor agonist on cultured myocardial cells with hypoxia/reoxygenation injury

LI Jiong   

  1. Binzhou Medical College, Yantai 264003, Shandong, China
  • Received:2007-10-29 Revised:2008-01-17 Online:2008-02-26 Published:2020-10-14

摘要: 目的:观察δ阿片受体激活剂D-丙(2)-D-亮(5) 脑啡肽(DADLE) 对培养心肌细胞缺氧/复氧(H/R) 损伤的保护作用。方法:采用培养的SD 大鼠乳鼠的心肌细胞, 建立H/R 损伤模型, 检测指标包括:(1) 心肌细胞形态;(2) 心肌细胞存活率;(3) 超氧化物歧化酶(SOD) 活性;(4) 丙二醛(MDA) 含量;(5) 乳酸脱氢酶(LDH) 活性。结果:模型组缺氧后心肌细胞存活率降低, 复氧30 min后进一步下降, 各个时间点细胞内SOD 活性下降, MDA 含量升高, LDH 活性升高, 与正常组比较差异有统计学意义(P <0.01), 复氧60 min 后各指标逐渐趋于正常状态;DADLE 1 μmol/L 组细胞存活率升高, LDH 活性降低, MDA 含量逐渐趋于正常, SOD 活性逐渐回升, 表明经DADLE 干预后, 心肌细胞抗损伤能力加强, 发生损伤的程度减轻;δ阿片受体抑制剂纳曲吲哚10 μmol/L 抑制DADLE的保护作用。结论:DADLE 通过δ阿片受体对乳鼠心肌细胞H/R 损伤具有保护作用。

关键词: δ阿片受体, 心肌细胞, 缺氧/复氧损伤

Abstract: AIM:To investigate the protective effects of a delta opioid receptor agonist, [ D-Ala(2), DLeu(5) ]-enkephalin (DADLE), on cultured myocardial cells with hypoxia/reoxygenation (H/R) injury. METHODS:The H/R injury model of cultured myocardial cells was made by SD suckling mice. The cell shape, livability, the activity of lactate dehdrogenase (LDH) and superoxide dismutase (SOD), and the content of malondialdehyde (MDA) of the cultured myocardial cells injured by H/R were determined. RESULTS:Compared with normal group, the cell livability and the SOD activity of model group after reoxygenation 30 min were decreased respectively, whereas the activity of LDH and the content of MDA of model group were increased significantly (P <0.01). Every index in the model group was changed to normal degree after reoxygenation for 60 min. In myocardial cells injured by H/R which were treated with 1 μmol/L DADLE, the LDH release and MDA content were decreased, while the cell livability and SOD activity were enhanced (P <0.01). A selective delta opioid receptor antagonist, naltrindole, at 10 μmol/L antagonized the effects of DADLE. CONCLUSION:DADLE has protective effects on the cultured myocardial cells injured by H/R by the stimulation of delta opioid receptor.

Key words: delta opioid receptor, myocardial cell, hypoxia reoxygenation injury

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