摘要
为探讨肝脏缺血再灌注损伤过程中血小板激活因子（ｐｌａｔｅｌｅｔａｃｔｉｖａｔｉｎｇｆａｃｔｏｒ，ＰＡＦ）及中性粒细胞的作用及其机理，作者在建立大鼠肝脏局部缺血再灌注损伤模型的基础上，对ＰＡＦ的变化及中性粒细胞的浸润程度进行了初步研究，观察了ＰＡＦ拮抗剂海风藤酮对大鼠肝脏局部缺血再灌注损伤的保护作用。结果表明：肝脏缺血再灌注损伤时肝组织ＰＡＦ含量增高，且随再灌注时间的延长而加重；早期肝组织抗氧化能力下降，大量氧自由基生成，以及细胞内钙超载是损伤的主要原因，而肝脏Ⅱ相损伤主要是由于肝组织ＰＡＦ的积聚，激活中性粒细胞，导致溶酶体酶和毒性自由基的产生所致。海风藤酮可以拮抗损伤过程中ＰＡＦ增高所致的药理作用，减轻肝脏脂质过氧化程度，改善肝功能，减轻肝脏病变程度。
To investigate the role of platelet activating factor (PAF), neutrophils in ischemia reperfusion induced liver injury and their possible mechanism, PAF and the degree of neutrophil infiltration in liver tissue and the preventive effects of PAF antagonist kadsurenone were evaluated in this study by means of a partial liver ischemia model, in which it was induced by clamping only left and median lobes of the liver without causing intestinal congestion. The present study was undertaken to find out the mechanism of liver ischemia reperfusion injury and preventive effect of kadsurenone. The results indicate that in early stage of reperfusion liver injury possibly caused by the generation of free radicals, declined of autioxidant defence and increased Ca 2+ influx, and in the later stage of reperfusion injury was mainly mediated by accumulation of PAF in the liver, which elicits the release of polymorphonuclear leukocytes induced toxical free radical, endothelial damage, microcirculatory collapse. The authors conclude that the effectiveness of antagonist kadsurenone in protecting against ischemia reperfusion induced liver injury is due not only to their action in preventing the direct effects of PAF, but also to their ability to inhibit both PAF priming and PAF dependent feedback processes, thus preventing escalation of auto generated inflammatory damage.
出处
《中国普外基础与临床杂志》
CAS
1998年第4期195-198,共4页
Chinese Journal of Bases and Clinics In General Surgery
关键词
血小板激活因子
肝脏
缺血再灌注损伤
海风藤酮
Platelet activating factor Liver Ischemia reperfusion injury Kadsurenone
