›› 2009, Vol. 29 ›› Issue (11): 1331-.

• 论著(基础研究) • 上一篇    下一篇

全氟碳化合物在离体心脏长时程低温保存中的作用

项 捷, 李洲斌, 臧旺福   

  1. 上海交通大学 医学院瑞金医院心脏外科, 上海 200025
  • 出版日期:2009-11-25 发布日期:2009-11-24
  • 通讯作者: 臧旺福, 电子信箱: zangwf@hotmail.com。
  • 作者简介:项 捷(1975—), 男, 主治医师, 学士;电子信箱: jiexiang021@hotmail.com。
  • 基金资助:

    教育部高等学校博士点基金(20070248079)

Effects of perfluorochemical on in vitro long-term hypothermic heart preservation in rats

XIANG Jie, LI Zhou-Bin, ZANG Wang-fu   

  1. Department of Cardiothoracic Surgery, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai 200025, China
  • Online:2009-11-25 Published:2009-11-24
  • Supported by:

    The Ministry of Education Foundation, 20070248079

摘要:

目的 研究全氟化碳化合物(PFC)在大鼠离体心脏长时程低温保存中的作用。方法 30只Wistar大鼠随机分为对照组(Celsior保存液)、Celsior 液通氧组(Celsior+O2)、双层法通氧组(PFC/Celsior+O2),每组10只。制备大鼠离体心脏Langendorff灌注模型。离体心脏在4 ℃条件下保存8 h,于复灌期分别检测血流动力学指标、冠脉流出量及磷酸肌酸激酶(CK) 、乳酸脱氢酶(LDH) 和天门冬氨酸转氨酶(AST)漏出量,观察心肌超微结构的改变。结果 心脏复灌后,与对照组和Celsior+O2组比较,Celsior/PFC+O2组左心室舒张压和左心室压力变化速率明显上升(P<0.01),LDH、CK和AST漏出量明显减少(P<0.01);而Celsior+O2组与对照组上述指标比较差异均无统计学意义(P>0.05)。超微结构观察发现,与对照组和Celsior+O2组比较,低温保存后PFC/Celsior+O2组心肌纤维排列较整齐,肌浆网扩张、线粒体肿胀及嵴结构破坏程度均较轻。结论 氧合的PFC与常规心脏保存液联合应用能够通过向缺血心肌提供更多的氧来改善能量代谢,提高离体大鼠心脏长时程低温保存的效果。

关键词: 全氟化碳, 双层法, 心肌保护, 能量代谢, 大鼠

Abstract:

Objective To investigate the effects of perfluorochemical (PFC) on in vitro long-term hypothermic heart preservation in rats. Methods Thirty Wistar rats were randomly divided into control group (Celsior solution), Celsior+O2 group (Celsior solution plus oxygen) and PFC/Celsior+O2 group (two-layer method plus oxygen), with 10 rats in each group. Langendorff model of isolated rat heart was prepared. The isolated heart was preserved at 4℃ for 8 h, and hemodynamic parameters, coronary effluent flow, and leakage of creatine kinase (CK), lactate dehydrogenase (LDH) and aspartate transaminase (AST) were detected after reperfusion. Besides, the myocardial ultrastructure was also observed. Results Compared with control group and Celsior+O2 group, the left ventricular developed pressure and ±dp/dt in PFC/Celsior+O2 group significantly increased (P<0.01), while LDH, CK and AST leakage significantly decreased (P<0.01). However, there was no significant difference in the above paramters between Celsior+O2 group and control group (P>0.05). Compared with control group and Celsior+O2 group, the impairment of myocardial ultrastructure in PFC/Celsior+O2 group after hypothermic preservation was alleviated. Conclusion PFC as a supplementation to oxygen in heart preservation solution could enhance myocardial protection during in vitro long-term hypothermic heart preservation in rats via the improvement of energy metabolism.

Key words: perfluorochemical, two-layer method, heart preservation, energy metabolism, rat