氨基胍和泰能对急性坏死性胰腺炎肠道细菌易位的影响

Effect of aminoguanidine and tienam on the bacterial translocation in mice with acute necrotizing pancreatitis

目的 观察氨基胍和泰能对ANP大鼠肠道细菌易位的影响,探讨其防治胰腺感染的效果.方法 50只SD大鼠随机数字法分为对照组、ANP组、氨基胍组、泰能组和氨基胍+泰能组(联合组),各10只.采用胰腺实质均匀注射5%牛黄胆酸钠的方法制作ANP模型,氨基胍组于制模后30min腹腔注射氨基胍100 mg/kg体重;泰能组于制模后6 h腹腔注射泰能60 mg/kg体重;联合组注射2种药.制模后48 h处死大鼠,检测血清淀粉酶和D-乳酸、胰腺组织MPO水平,观察胰腺病理变化,采集胰腺、肝脏、血液、肠系膜淋巴结、腹水行细菌培养.结果 (1)氨基胍组和联合组血清淀粉酶分别为(1173.30±199.73)U/L、(1075.00±200.40)U/L,血清D-乳酸分别为(7.17±1.25)μg/ml、(6.98±1.06)μg/ml,胰腺MPO分别为(0.80±0.07)U/g湿片、(0.78±0.08)U/g湿片,细菌培养平均阳性率分别为20%、16%.较ANP组血清淀粉酶(2234.60±692.06)U/L、血清D-乳酸(12.41±1.78)μg/ml、胰腺MPO(1.59±0.20)U/g湿片、细菌培养平均阳性率60%均有显著改善(P＜0.05);(2)泰能组胰腺MPO为(0.80±0.06)U/g湿片、细菌培养平均阳性率为18%,也较ANP组显著改善(P＜0.05).但泰能组的血清淀粉酶和D-乳酸与ANP组比较无统计学差异;(3)ANP组胰腺实质有片状坏死、间质充血、大量白细胞浸润,而氨基胍组、泰能组、联合组胰腺组织无明显白细胞浸润.结论 氨基胍和泰能能减少ANP大鼠肠道细菌易位,减少SAP胰腺继发感染.

Objective To investigate the effect of aminoguanidine and tienam on bacterial translocation in mice with acute necrotizing pancreatitis (ANP) and the preventive and curative effect on pancreatic infection. Methods 50 SD mice were randomly divided into 5 groups, including group A: normal control (n=10), group B: ANP group (n=10), group C: aminoguanidine treatment group (n=10), group D: tienam treatment group (n=10), and group E: aminoguanidine plus tienam treatment group (n=10). ANP was induced by intrapancreatic injection of 5% sodium tanrocholate (2.5 ml/kg). Aminoguanidine (100 mg/kg) was injected intraperitioneally 30 minutes after ANP induction, tienam (60 mg/kg) was injected intraperitioneally 6 hours after ANP induction. The mice were killed at 48 hours, and serum amylase, serum D- lactate, pancreatic MPO were measured. Pathological alterations in the pancreas were examed. The pancreas, liver, blood, mesenteric lymph node and ascites were collected for microbiological study. Results In group C and E, the levels of serum amylase were 91173.30±199.73) U/L and (1075.00±200.40) U/L; the serum D-lactate were (7.165±1.2533) μg/ml and (6.980±1.060)μg./ml; the pancreatic MPO were (0.8035±0.0711) U/g wet film and (0.7765±0.0843 ) U/g wet film; the average bacterial positive rates were 20% and 16%. In group B, the serum amylase was (2234.60±692.06 )U/L;the serum D-lactate was (12.408±1.779)μg,/ml, the pancreatic MPO was (1.5942±0.1965) U/g wet film; the average bacterial positive rate were 60%. The differences between group C, E and group B were statistically significant (P＜ 0.05). In group D, the pancreatic MPO was (0.8002±0.0603 ) U/g wet film and the the average bacterial positive rate was 18%, and they were statistically different when compared with those of group B (P±0.05). While in group D, the serum amylase and D-lactate was not statistically different when compared with those of group B (P＞0.05). There were lamellar necrosis in the parenchyma, hyperaemia and leukocytic infiltrate in the pancreatic mesenchyma in the ANP group, while no leukocytic infiltrating in group C, D, E was found. Conclusions The aminoguanidine and tienam might decrease gut bacterial translocation and prevent pancreatic infection in ANP.