mtPLA2在严重烧伤早期心肌线粒体损害中的作用

被引:8
作者
梁晚益
杨宗城
黄跃生
机构
[1] 第三军医大学附属西南医院烧伤研究所!重庆
关键词
烧伤; 线粒体; 磷脂酶A2; Ca2+; 大鼠;
D O I
10.16016/j.1000-5404.2000.03.003
中图分类号
R364 [病理过程];
学科分类号
摘要
目的 :探讨线粒体PLA2 (MitochondrialPLA2 ,mtPLA2 )在严重烧伤早期心肌线粒体损害中的作用。方法 :取正常及伤后 1、3、6、12、2 4h大鼠心肌分离线粒体 ,测其呼吸功能及Ca2 + 浓度 ( [Ca2 + ] m)、mtPLA2活性。结果 :①心肌线粒体呼吸控制率 (RCR )伤后 1h升高 ,3、6、12、2 4h明显低于正常组 ,Ⅲ态呼吸速率(ST3 )变化与RCR平行 ,ST4 仅于伤后 3h有明显升高 ;②伤后各时相点 [Ca2 + ] m 均明显升高 ,而mtPLA2 活性于伤后 3、6、12、2 4h显著高于正常组 ;③伤后 3、6hRCR与mtPLA2 活性呈明显负相关 (r =-0 683 5 ,P <0 0 1;r =-0 5 419,P <0 0 1)。结论 :伤后 [Ca2 + ] m 升高可激活mtPLA2 ,后者在严重烧伤早期心肌线粒体损害中起重要作用。
引用
收藏
页码:210 / 212
页数:3
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