Role of somatostatin in protecting small-for-size liver after hepatectomy in rats with cirrhosis / 中华肝胆外科杂志

ABSTRACT

Objective To explore the role of somatostatin in protecting small-for-size liver after hepatectomy in rats with cirrhosis.Methods Forty-eight rats with cirrhosis were randomly divided into somatostatin group (group S,n =24) and normal saline control group (group N,n =24).All rats from the two groups were measured with baseline portal vein pressure and blood flow volume.Additionally,at the endpoints of 15,30 and 60 min after ischemia/reperfusion with hepatic inflow occlusion,portal vein pressure and blood flow volume were detected from both groups.Liver function test was also measured at the endpoints of 1,3,5,24 h after ischemia/reperfusion for groups S and N.Results After 15-min ischemia/reperfusion,the portal vein pressure was higher in the rats of group S than that in group N [(19.4 ± 0.8) cmH2O vs.(22.5 ± 1.2) cmH2O (1 cmH2O =0.098 kPa)],there was significant difference (P ＜ 0.05).After 30 min ischemia/reperfusion,portal vein pressure results were (17.1 ± 0.8) cmH2O and (19.7 ± 0.8) cmH2O in group S and group N,respectively,P ＜ 0.05.At different endpoints,portal blood flow volume results were all higher in both groups than baseline figures.Furthermore,maximum portal blood flow volume was observed at the endpoint of 15 min ischemia/reperfusion in both groups,and lower in group S than group N [(10.1 ±0.4)ml/min vs.(11.9 ±0.5)ml/min,P＜0.05].Liver function test revealed AST,ALT,TBil exceed normal limits in rats of both groups,which elevated along prolonged ischemia/reperfusion.One week after hepatectomy,the survival of rats treated with somatostatin (group S,7/10) was superior to saline control group (group N,2/10),P ＜0.05.Future liver volume increased in rats from both groups,much significant increase was determined in group S [(5.5 ± 0.4) g vs.(6.6 ± 0.3) g,P ＜ 0.05].Conclusions Somatostatin might improve portal vein hypertension status in the early stage of small-for-size liver after hepatectomy,and decrease portal blood flow.Furthermore,it could alleviate small-for-size liver injury associated with portal vein hypertension and hyperperfusion,and benefit liver regeneration and improve postoperative survival in rats with cirrhosis.