吡格列酮预处理对急性坏死性胰腺炎大鼠模型的影响

Pioglitazone pretreatment for acute necrotizing pancreatitis in rats

目的 探讨吡格列酮预处理对ANP大鼠的影响.方法 54只大鼠采用经胆胰管逆行注射5%牛磺胆酸钠制备ANP模型.大鼠按随机数字法分为ANP组、吡格列酮组和假手术组,各18只.吡格列酮组在制模前2 h腹腔注射0.2%吡格列酮20 mg/kg体重.分别在术后3 h、6 h、12 h处死动物,取血检测血淀粉酶,取胰腺组织观察胰腺大体及组织学变化,分别按Hushes和Kusske标准评分.结果 术后3 h、6 h、12 h,ANP组及吡格列酮组血淀粉酶、胰腺大体病理的Hughes评分和胰腺组织学Kusske评分比假手术组明显升高;吡格列酮组大鼠术后12 h血淀粉酶、胰腺Hughes评分和Kusske评分分别为(2 980±1 080)U/L、4.50±2.07和7.50±1.05,均明显低于ANP组的(7 598±1 072)U/L、7.17±1.47和11.33±1.75(P＜0.01).结论 吡格列酮预处理可降低ANP大鼠血清淀粉酶,减轻胰腺大体、组织学病理改变,说明吡格列酮具有预防ANP的效应.

Objective To investigate the effect of pretreatment of pioglitazone on acute necrotizing pancreatitis (ANP) rats. Methods ANP was induced by retrograde injection of 5% sedinm deoxycholate into bilio-pancreatic ducts. The animals were randomly divided into ANP (n=18), sham operation (n=18) and pioglitazone pretreatment group (n=18). Pioglitazone was given 20 mg/kg in pioglitazone group before ANP was induced. The rats were sacrificed 3 h, 6 h, 12 h after ANP induction, respectively. Bblood samples were taken for serum amylase measurement. Tissue samples of pancreas were harvested for morphological observation under conventional light microscopy. Pathological change of pancreas was evaluated by Hughes and Kusske score system. Results The concentration of serum amylase and the pancreatic histological score in pioglitazone and ANP groups were significantly higher than those in sham operation group (P＜0.001 ). The concentration of serum amylase, Hughes and Kusske score in pioglitazone group at 12 h after ANP induction were (2980± 1080) U/L,4.50±2.07 and 7.50±1.05, respectively, and were lower than (7598±1072) U/L, 7.17±1.47 and 11.33±1.75 of ANP group at 12 h (P＜0.01). Conclusions Pioglitazone pretreatment could decrease the serum level of amylase and the pancreatic histological score. Pioglitazone may ameliorate the severity of ANP.