RESUMEN
Objective To investigate the influence of VEGF expression on the apoptosis of pancreas subjected to ischemia/reperfu-sion injury. Methods Thirty male SD rats were randomly divided into three groups (rt = 10). Group A was served as sham-operation group. Groups B were subjected to 30 min of ischemia by clamping of celiac artery and superior mesenterie artery then releasing for 6 hours to produce ischemia/reperfusion injury model. Groups C were treated with VEGF antisense oligodeexynueleotide after isehemia. Rats were sacrificed, the pancreas was obtained to detect the VEGF expression by immunohistochemical method, and apoptosis was determined by TUNEL staining. Results Apoptosis appeared and VEGF expression up regulated in pancreas after Isehemia/reperfusion injury. Comparison between Groups C and Groups B showed a significant down regulation of VEGF expression (P <0. 05) and a notable increase of apoptotic index (P < 0. 05). Conclusion VEGF expression suppresses apeptosis of pancreas during the course of ischemia/reperfusion injury and may play an important role in protection of pancreas against the ischemia/repeffusion injury.
RESUMEN
Objective To explore the effect of nitroglycerin on ET/NO, TXA2/PGI2 and pancreas pathomorphology changes in severe acute pancreatitis (SAP) rats. Methods Sixty SD rats were random divided into five groups, including control group (A group, n = 12) and experimental group(B,C,D and E group, n = 12). The SAP was induced by injection of 5% sodium taurocholate through retrograde common biliopancreatic ducts via duodenal papilla with epidural catheter. Group C, D and E were intravenously injected with nitroglycerin 0.5μg/kg/min,1μg/kg/min and 2μg/min in 30 min respectively, and group A and B was injected with Sodium Chloride 0.5ml. The indexes of changed pathomorphology and ET/NO, TXB2/6-keto-PGF1a, were determined at the 6th and 12th hour after operations, respectively. Results The specimen data of the 6th and 12th hour displayed that the indexes of changed pathomorphology, ET, ET/NO, TXB2, and TXB2/6-keto-PGF1a of the group C,D and E degraded respectively, compared to group B(P < 0.05). Conclusion The nitroglycerin could degrade ET, ET/NO,TXA2 and TXA2/PGI2, improve the microcirculation of pancreas, and delay the pathological inflammation change in SAP rats.