ABSTRACT
Objective To investigate the role of apoptosis and the regulating role of receptor interacting protein 1(RIP1) in acute pancreatitis .Methods Thirty C57 mice were divided into three groups :control group ,acute edematous pancreatitis (AEP) group and acute necrotizing pancreatitis (ANP) group .The AEP group was continuously injected by cerulein 50 μg/kg for 13 times ,the ANP group was continuously injected by cerulein 50μg/kg for 13 times and lipopolysaccharide 15 mg/kg once;the con‐trol group was injected by the same volume of normal saline for 7 times .The acinar cell apoptosis was observed by the terminal de‐oxynucleotidyl transferase‐mediated deoxyuridine triphosphate nick‐end labeling (TUNEL) assay .The RIP1 mRNA expression was measured by real time fluorescence PCR .The expression of RIP1 protein was detected by Western blotting .Results The mouse models of AEP and ANP were established successfully .Compared with the control group ,acinar cell apoptosis existed in both AEP and ANP model groups ,moreover compared with the AEP group ,apoptosis in the ANP group were decreased ,the differences were statistically significant(P<0 .05) .Compared with the control group ,the expression of RIP1 mRNA and protein in the AEP group was increased ,while which in the ANP group were decreased ,the differences were statistically significant(P<0 .05) .Conclusion RIP1 participate in the pathogenesis of acute pancreatitis ,which may associate with acinar cell apoptosis .