• 中山大學(xué)附屬第一醫(yī)院器官移植中心(廣州510080);

目的  研究S-腺苷蛋氨酸(SAM)預(yù)處理對(duì)大鼠肝臟缺血再灌注損傷線粒體功能的影響。
方法  54只大鼠按隨機(jī)數(shù)字表法隨機(jī)均分為對(duì)照組、缺血再灌注組(I/R組)和SAM組,SAM組大鼠肝臟在缺血前2 h行腹腔注射SAM預(yù)處理。3組動(dòng)物在阻斷肝門30 min后(對(duì)照組僅做分離,不阻斷肝門)復(fù)流,并于再灌注后0、1和6 h抽取下腔靜脈血檢測ALT及AST,切取肝組織檢測線粒體SOD、MDA、ATP及EC,并制備病理切片在電鏡下觀察線粒體的超微結(jié)構(gòu)。
結(jié)果  再灌注后0、1及6 h,I/R組ALT、AST和MDA明顯高于對(duì)照組(P<0.01), SOD(除0 h外)、ATP及EC明顯低于對(duì)照組(P<0.01); SAM組ALT、AST及MDA(除0 h外)明顯低于I/R組(P<0.01),SOD(除0 h外)、ATP及EC明顯高于I/R組(P<0.05,P<0.01)。超微結(jié)構(gòu)觀察,I/R組線粒體較對(duì)照組有明顯的損傷,線粒體數(shù)量減少,腫脹明顯,嵴模糊不清,基質(zhì)密度低; 而SAM組與I/R組相比損傷程度明顯減輕。
結(jié)論  SAM能抑制線粒體脂質(zhì)過氧化反應(yīng),提高ATP的產(chǎn)生,最終提高線粒體的能量代謝水平,有效地減輕肝臟的缺血再灌注損傷。

引用本文: 郭志剛,何曉順,熊俊,朱曉峰,王東平,錢世鹍,黃潔夫. S-腺苷蛋氨酸對(duì)大鼠缺血再灌注肝臟能量代謝的影響. 中國普外基礎(chǔ)與臨床雜志, 2007, 14(2): 181-184. doi: 復(fù)制

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