急性坏死性胰腺炎大鼠血浆内皮素的改变及其意义

为了解急性坏死性胰腺炎（ａｃｕｔｅ ｎｅｃｒｏｔｉｚｉｎ ｐａｎｃｒｅａｔｉｔｉｓ，ＡＮＰ）时血浆内皮素（ｅｎｄｏｔｈｅｌｉｎ，ＥＴ）的变化及其病理意义，进行了前瞻性动物实验。即将ＳＤ大鼠随机分为３组：急性坏死性胰腺炎组（ＡＮＰ组，ｎ＝２），组胆胰管注入５％牛磺胆酸钠（ＳＴＣ １ｍｌ／ｋｇ）制造ＡＮＰ模型，假手术组（ＳＯ组，ｎ＝２４）和血小板激活因子拮抗剂ＢＮ５０７３９组（ＢＮ组，ｎ＝２４）。测定

THE CHANGE AND SIGNIFICANCE OF PLASMA LEVELS OF ENDOTHELIN IN ACUTE NECROTIZING PANCREATITIS IN RATS

This prospective animal study was designed to investigate the changes of plasma endothelin (ET) levels in acute necrotizing pancreatitis (ANP). Sprague Dawley rats were randomly devided into 3 groups: acute necrotizing pancreatitis (ANP) group in which ANP was induced by infusion of 5% sodium taurocholate (STC) into biliopancreatic duct, sham operation (SO) group and platelet activating factor antagonist BN 50739 (BN) group. Blood levels of ET and platelet activating factor (PAF) were detected. Pancreatic microcirculatory blood flow was measured and pancreatic histological scores were evaluated. Results showed that the pancreatic microcirculatory blood flow in ANP group was decreased to a great extent immediatly after induction of ANP and soon began to rise slowly for 3 hours and again decreased steadily after that. The blood levels of ET, PAF and histological scores in ANP group were significantly higher than those in SO group. In BN group, the blood flow was significantly improved and the levels of blood ET, PAF and histological scores were all significantly lower as compared to those in ANP group. It is concluded that ischemia/ reperfusion is present in the initiation of acute necrotizing pancreatitis induced by STC in the rat. This leads to injuries of endothelial cells and increase in the production of ET and PAF. I/R lesions,and interaction of ET and PAF lead to a vicious circle, thus augmenting the pathological changes in the pancreas.