大剂量L-精氨酸分3次腹腔内注射制备大鼠急性坏死性胰腺炎模型

目的 建立一种操作简单、病变典型、稳定性好的大鼠急性坏死性胰腺炎模型.方法 100只SD大鼠采用随机数字法分为急性坏死性胰腺炎(acute necrotizing pancreatitis,ANP)模型组(A组, n=50)和对照组(C组,n=50),C组接受生理盐水对照,A组大鼠分3次腹腔内注射8% L-精氨酸(3×1.5 g/kg,每次间隔1 h),第3次注射后选取6、12、24、48 h和72 h 5个时相点观测两组大鼠胰腺病理学和血清淀粉酶水平的变化情况.结果 L-精氨酸注射后6 h可见胰腺少量炎细胞浸润、腺泡水肿;12 h见胰腺较多的炎细胞浸润,小叶结构紊乱和小叶间水肿;24 h 见胰腺大量炎细胞浸润,腺小叶结构损坏和局灶性坏死;48 h见弥漫性腺泡坏死和脂肪组织坏死;72 h见胰腺大片凝固性坏死和胰腺结构模糊;同时胰腺组织病理评分(A组vs C组)呈现相同的时相性变化6 h (5.26±1.30)vs (0.67±0.52),P<0.01;12 h (6.83±1.20)vs(0.57±0.43),P<0.01;24 h (7.43±1.40) vs (0.47±0.63),P<0.01;48 h (8.27±1.10) vs(0.43±0.65),P<0.01;72 h(7.63±1.20) vs(0.67±0.52),P<0.01].各组血清淀粉酶水平(A组 vs C组),A组呈时相性变化,C组各时相点无明显差异6 h (6 090±475)U/L vs (1 465±106)U/L, P<0.01;12 h (19 975±962)U/L vs (1 535±157)U/L, P<0.01;24 h(20 970±1 027)U/L vs(1 620±174)U/L, P<0.01;48 h (2 390±233)U/L vs (1 450±97)U/L, P<0.01;72 h(1 680±205)U/L vs (1 560±162)U/L,P>0.05].结论 分3次腹腔内注射大剂量L-精氨酸可成功制备操作简单、病变典型、重复性好和非侵入性的大鼠急性坏死性胰腺炎模型.

Establishment of rat acute necrotizing pancreatitis model by intraperitoneal injection with excessive dose of L-arginine

Objective To establish a simple rat model of acute necrotizing pancreatitis (ANP) with typical pathological lesion and good stability. Methods One hundred rats were randomly divided into ANP group (group A) and control group (group C),50 rats in each group. Rats in group C received normal saline. Rats in group A were intra-peritoneally injected with L-arginine (1.5 g/kg each time,3 times,at 1 h interval) at the concentration of 80 g/L to establish a rat ANP model. Changes in pancreatic pathology and serum a...