肠三叶因子对坏死性小肠结肠炎新生鼠白细胞介素-6的影响

目的探讨肠三叶因子（ITF）对坏死性小肠结肠炎（NEC）新生大鼠肠黏膜组织IL-6水平的影响，分析ITF对NEC的保护作用机制。方法新生鼠32只随机分为4组，每组各8只，正常对照组（A组）；NEC模型组（B组）；NEC模型后予以皮下注射9g/L盐水0．2mL（C组）；NEC模型后予以皮下注射ITF0.2mg（D组）。取近回盲部1-2cm肠道组织固定包埋、切片、HE染色做病理学检查，其他肠道组织制备组织匀浆取上清液检测IL-6水平。结果B、C组组织匀浆IL-6的水平较A、D组显著增高（Pa〈0.05，0．01），A与D组无明显差异（P〉0．05）。病理切片显示C、D组HE染色切片见肠壁损伤轻重不一，可见全肠黏膜绒毛坏死，病理评分的中位积分为3分；D组肠上皮细胞少量脱落，顶端绒毛坏死，病理评分的中位积分为1分。结论通过皮下注射ITF可减轻NEC后的肠道炎性反应。ITF有可能为治疗NEC提供新的方法。

Influence of Intestinal Trefoil Factor on Interleukin-6 in Neonatal Rats with Necrotizing Enterocolitis and Its Clinical Significance

Objective To explore the influence of intestinal trefoil factor (ITF) on interleukin-6(IL-6) in neonatal rat with necrotizing enterocolitis(NEC) ,and to discuss the protective machanism of ITF on NEC.Methods Thirty-two neonatal rats were divided randomly into four groups,group A as control group,group B as NEC group,group C as NEC NS 0.2 mL group,group D as NEC ITF 0.2 mg group.NEC model of neonatal rats were established.On the 4th day,all the subjects were put to death.Intestinal tissue within the boundary of ileum and cecum was obtained to observe histological changes.Other intestinal tissue was treated into homogenate.After the homogenate was centrifuged,supernates were used to test the density of IL-6.Results The density of IL-6 significantly decreased in group A,D than those in group B and C (Pa<0.05,0.01);and there was no difference between group A and D(P>0.05).The pathological lesions indicated that intestinal tissue necrosis was severe in group B and C,which was graded as 3 points,but obviously lessen in group D,which was graded as 1 point,with ITF interfering.Conclusions Intestinal inflammation is ameliorated after ITF are injected hypodermically or intraperitoneally.ITF may provide a brand-new way for the therapy of NEC in neonatal rats.