摘要
目的构建大鼠重症急性胰腺炎(SAP)模型,探讨复合乳酸菌对SAP大鼠细胞因子和肠道免疫屏障的影响。方法96只Sprague-Dawley大鼠,体重(200±10)g,随机分为12组(n=8),包括假手术早期肠内营养治疗(Sham-EEN)4天、7天组、早期肠内营养治疗(EEN)4天、7天组、早期肠内营养加复合乳酸菌治疗(EEN+Lac)4天、7天组;假手术肠外营养治疗(Sham-PN)4天、7天组、肠外营养治疗(PN)4天、7天组、肠外营养加复合乳酸菌治疗(PN+Lac)4天、7天组。采用胰腺被膜下均匀注射3.8%牛磺胆酸钠1ml的方法建立大鼠SAP模型。分别于第4和7天取材,检测血清肿瘤坏死因子-α(TNF-α)和白介素-10(IL-10)的水平,评价IL-10/TNF-α的平衡状态;并检测小肠黏液SIgA含量。结果(1)血清TNF-α水平各SAP模型组均显著高于假手术组(P<0.05);PN组显著高于EEN组和EEN+Lac组(P<0.05);EEN组显著高于EEN+Lac组(P<0.05);PN组显著高于PN+Lac组(P<0.05);各SAP模型4天组显著高于7天组(P<0.05)。(2)血清IL-10水平各SAP模型组均显著高于假手术组(P<0.05);PN组显著低于EEN组和EEN+Lac组(P<0.05);PN4天组低于PN+Lac组(P<0.05);各SAP模型4天组显著高于7天组(P<0.05)。(3)血清IL-10/TNF-α比值PN组显著低于EEN组、EEN+Lac组(P<0.05);EEN组低于EEN+Lac组(P<0.05);各SAP4天组低于7天组(P<0.01)。(4)小肠黏液SIgA含量SAP模型组除了EEN+Lac7天组外,其他各组均显著低于假手术组(P<0.01);各SAP模型4天组显著低于7天组(P<0.05);EEN+Lac组显著高于EEN组(P<0.05),EEN+Lac和EEN组显著高于PN组(P<0.05),EEN+Lac组显著高于PN+Lac组(P<0.05)。结论复合乳酸菌可改善SAP大鼠促炎和抗炎细胞因子的平衡状态和肠道的免疫功能;EEN在改善SAP大鼠机体炎症状态和肠道免疫功能方面优于PN。
Objective To investigate the effect of compound lactobacilli on cytokines balance and intestinal immunobarrier in established rats models of severe acute pancreatitis (SAP). Methods Totally 96 Sprague-Dawley rats (weight: 200 + 10 g) were randomly divided into 12 groups consisted of 6 pairs (n = 8), including sham-operation with early enteral nutrition support (Sham-EEN) groups, ENN groups, EEN with compound lactobacilli ( EEN + Lac) groups, sham-operation with parenteral nutrition support (Sham-PN) groups, PN groups, and PN + Lac groups. Each pair had a 4-day group and a 7-day group. The SAP model in rat was established by injecting 1 ml of 3.8% sodium taurocholate beneath the pancreatic capsule. Samples were taken on the 4th or 7th day to determine the serum levels of tumor necrosis factor-α (TNF-α) and interleukin-10 (IL-10) , evaluate the ratio of IL-10/TNF-α in serum and detect the SIgA content in small intestinal mucus in different groups. Results ( 1 ) TNF-α level : significantly higher in SAP groups ( P 〈 0.05 vs. Sham groups) ; significantly higher in PN groups ( P 〈 0.05 vs. EEN and EEN + Lac groups) ; significantly higher in EEN groups ( P 〈 0.05 vs. EEN + Lac groups) ; higher in PN groups (P 〈0.05 vs. PN + Lac groups) ; and higher in all the SAP 4-day groups compared with SAP 7-day groups ( P 〈 0.05 ). (2) IL-10 level : significantly higher in SAP groups ( P 〈 0. 05 vs. Sham groups) ; significantly lower in PN groups ( P 〈 0.05 vs. EEN and EEN + Lac groups) ; significantly lower in 4-day PN group (P 〈 0.05 vs. PN + Lac group) ; significantly higher in all the SAP 4-day groups compared with SAP 7-day groups (P 〈 0.05 ). (3) The ratio of IL-10/TNF-α : lower in PN groups ( P 〈 0.05 vs. EEN and EEN + Lac groups) ; lower in EEN groups (P 〈0.05 vs. EEN + Lac group) ; lower in all the SAP 4-day groups compared with SAP 7-day groups ( P 〈 0. 01 ). ( 4 ) SIgA content : significantly lower in SAP groups except EEN + Lac 7-day group (P 〈 0.01 vs. Sham groups) ; lower in all the SAP 4-day groups (P 〈 0.05 vs. SAP 7-day groups) ; significantly higher in EEN + Lac groups (P 〈0.05 vs. EEN groups) ; lower in PN groups ( P 〈 0. 05 vs. EEN + Lac and EEN groups) ; and significantly higher in EEN + Lac groups compared with PN + Lac groups ( P 〈 0.05 ). Conclusions Compound lactobacilli could improve the balance between inflammatory and anti-inflammation cytokines as well as the intestinal immune function in SAP rats. EEN surpasses PN in benefiting the inflammatory condition and the intestinal immune system in SAP.
出处
《中国临床营养杂志》
2007年第1期30-35,共6页
Chinese Journal of Clinical Nutrition
基金
第二军医大学附属长海医院联合攻关基金(20031119)
关键词
重症急性胰腺炎
乳酸菌
肠内营养
肠外营养
细胞因子
severe acute pancreatitis
lactobacillus
enteral nutrition
parenteral nutrition
cytokine