DNCB所致小鼠结肠炎与LMIF的关系

DNCB induces colitis and its relation with LMIF activity

目的 :用 2 ,4 -二硝基氯苯 (DNCB)诱导小鼠肠迟发过敏反应及结肠炎症和溃疡 ,并观察白细胞移动抑制因子 (LMIF)活性的变化 ,以探讨DNCB结肠炎与人类溃疡性结肠炎 (UC)的关系。方法 :将小鼠随机分为实验组和对照组 ,首先用 3 3%DNCB涂腹致敏 ,然后以 0 1%DNCB、0 2 %DNCB和 0 4 %DNCB(对照组以 6 0 %乙醇 )灌肠 ,每天 1次 ,连续 4d。观察疾病活动指数、结肠大体和镜下改变 ,以及LMIF活性的改变。结果 :0 2 %DNCB和 0 4 %DNCB组疾病活动指数、组织病理学评分以及LMIF活性均显著高于对照组 (P <0 0 5 ,P <0 0 1)。结论 :DNCB能够诱导小鼠溃疡性结肠炎 ,并在此UC的发病过程中LMIF活性显著升高。

AIM: In order to explore the pathogenesis of ulcerative colitis (UC), an experimental colitis in mouse was induced by the hapten dinitrochlorobenzene (DNCB), and the activity of leukocyte migration inhibitory factor (LMIF) was measured at the same time. METHODS: 67 BALB/c mice were randomly divided into control (60% ethanol) and DNCB groups. After they were sensitized by smearing 3.3% DNCB on the abdominal skin, they were challenged with DNCB at concentration of 0.1%, 0.2% and 0.4% respectively by instillation once a day. The weight, stool viscosity and hematochezia were observed and accumulated as disease active index (DAI) score. The pathological changes in colon tissue were judged macropathologically and by means of microscope. LMIF activity was determined by the absorbance (A) of migrated leukocytes. RESULTS: Compared to control group, the increases in DAI accumulate score, pathologic score, and LMIF activity in DNCB groups were observed. CONCLUSION: Mouse colitis was induced by DNCB, which was accompanied by an increase in LMIF activity. [