Effect of Rutoside on pancreatic acinar cell apoptosis in rats with acute pancreatitis and its mechanism / 中国药理学通报

ABSTRACT

Aim To study the effect of Rutoside (Ru) on pancreatic acinar cell apoptosis in rats with acute pancreatitis(AP). Methods The AP model in rats was induced by retrograde injection of 3% sodium taurocholate into biliopancreatic duct. Ru (15, 30 and 60 mg?kg~ -1 ?h~ -1 )was administered by intravenous infusion for 6 hours immediately after the induction of AP.The histopathological changes of pancreas were observed under light microscope and electronic microscope.A terminal deoxynucleotidyl transferase-mediated dUTP-biotion nick end labeling(TUNEL) method was used to detect apotosis of pancreatic acinar cell and apoptosis immunohistochemical method. Results Ru (15, 30 and 60 mg?kg~ -1 ?h~ -1 ) improved the histopathological changes of pancreas significantly.The apotosis index of pancreatic acinar cells was significantly higher than that the AP model group. The gray value of Fas was lower than that of the AP model group. Immuno-staining revealed that moderate to strong FasL immunoreactivity was present in the cytoplasm of the acini of all groups.But in AP model group,the gray value of FasL was lower than that in Ru-treated groups.AI was positively correlated with the gray value of Fas,and was negatively correlated with the gray value of FasL and the severity of pancreas damages. Conclusion The protective effect of Ru on AP may be concerned with the induction of apoptosis in injured pancreatic acinar cells.And the Fas/FasL system may contribute to the process.