长时间输注丙泊酚对兔心肌酶、线粒体细胞色素C和ATP的影响

目的：探讨长时间输注丙泊酚对兔心肌酶、线粒体细胞色素C和ATP的影响。方法：18只成年新西兰兔随机分为空白对照组、丙泊酚组和脂肪乳组，每组6只。空白对照组持续输注0.9%生理盐水，丙泊酚组持续输注1%丙泊酚，脂肪乳组持续输注10%脂肪乳。试验过程中分别在0，8，16 h和实验终点采集动脉血检测肌酸激酶(creatine kinase，CK)和肌酸激酶同工酶(creatine kinase-MB，CK-MB)，实验结束取心肌组织，用差速离心法分离心肌线粒体，高效液相色谱法测量线粒体细胞色素C含量和ATP含量。结果：与空白对照组相比，丙泊酚组和脂肪乳组细胞色素C从线粒体的释放增加，差异均有统计学意义(均P<0.05)；丙泊酚组和脂肪组两组间比较差异无统计学意义(P>0.05)；3组间线粒体内ATP含量比较，差异均无统计学意义(均P>0.05)。与同组0 h点比较，丙泊酚组和脂肪乳组在输注8，16和24 h的CK升高(均P<0.05)；与空白对照组比较，丙泊酚组和脂肪乳组在输注8，16和 24 h的CK升高(均P<0.05)；与脂肪乳组比较，丙泊酚组CK在输注8，16和24 h升高，差异均有统计学意义(均P<0.05)。与空白对照组比较，丙泊酚组在持续输注丙泊酚24 h时CK-MB升高明显(P<0.05)；与同组0 h点比较，丙泊酚组在持续输注24 h后CK-MB升高明显(P<0.05)。结论：长时间输注丙泊酚和脂肪乳均可使血清CK升高，但丙泊酚可使CK-MB升高。丙泊酚和脂肪乳均能使心肌线粒体细胞色素C释放增加，但不影响心肌线粒体ATP产量。

Effect of prolonged propofol infusion on myocardial enzyme,mitochondrial cytochrome C and adenosine #br# triphosphate in rabbits

Objective: To explore the effect of long-time propofol infusion on myocardial enzymes, mitochondrial cytochrome C and ATP in rabbits. Methods: A total of 18 New Zealand rabbits were randomly divided into 3 groups: a control group, a propofol group and an intralipid group. The rabbits were continuously infused with 0.9% normal saline in the control group, 1% propofol in the propofol group, and 10% intralipid in the intralipid group, respectivey. The arterial blood was collected at 0, 8, 16 h and the end of experiment to examine creatine kinase (CK) and creatine kinase isoenzyme (CK-MB). In the end, the myocardial mitochondria from myocardial tissues was separated by differential centrifugation, and mitochondrial cytochrome C content and adenosine triphosphate (ATP) levels were examined by high performance liquid chromatography. Results: Compared with the control group, the release of cytochrome C from mitochondria were increased in the propofol group and the intralipid group (both P<0.05), but there was no significant difference between them (P>0.05). There was also no significant difference in the ATP content of the mitochondria among the 3 groups (P>0.05). The levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group and the intralipid group compared with that before the infusion (all P<0.05); compared with the control group, the levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group and the intralipid group (all P<0.05); compared with the intralipid group, the levels of CK were increased at 8, 16 and 24 h after infusion in the propofol group (all P>0.05); compared with the control group, the levels of CK-MB were obviously increased in the infusion of propofol for 24 h in the propofol group (P<0.05). Conclusion: The levels of serum CK increase after the infusion of propofol and intralipid for a long time, and the levels of CK-MB also elevate in the infusion of propofol. Propofol and intralipid can increase the release of myocardial mitochondrial cytochrome C, but they don’t affect the ATP production in myocardial mitochondrial.