三丁基氯化锡对小鼠免疫功能的影响

目的研究三丁基氯化锡(TBTCl)对小鼠免疫功能的影响.方法将60只ICR种小鼠随机分为5组,即阴性对照组、低剂量组、中剂量组、高剂量组、阳性对照组(环磷酰胺),每组12只,雌雄各半,分别用10ml/kg生理盐水,0.8、4、20mg/kg TBTCl和25 mg/kg环磷酰胺经口染毒2周,1次/d,测定外周血T淋巴细胞的数目及脾脏T淋巴细胞转化率,血清中的溶血素,以及廓清指数及脏器系数,观察TBTCl对小鼠细胞免疫、体液免疫、非特异性免疫功能的影响.结果小鼠体重有随染毒剂量增加而下降的趋势;低剂量组小鼠T淋巴细胞数与阴性对照组差别不明显;中剂量组小鼠T淋巴细胞ANAE阳性率升高(P＜0.05),但对淋巴细胞转化率没有影响;高剂量组小鼠T淋巴细胞数ANAE阳性率低于阴性对照组(P＜0.01),淋巴细胞转化率降低(P＜0.01);中剂量染毒能促进小鼠溶血素的产生,与阴性对照组比较,差异有统计学意义(P＜0.01),而对廓清指数没有影响;高剂量染毒小鼠的廓清指数和溶血素低于阴性对照组(P＜0.01),该结果与阳性对照组一致;各剂量组小鼠肝、肾系数差异不明显,低、中剂量组小鼠的脾、胸腺系数差异也不明显,但高剂量组小鼠的脾、胸腺系数低于阴性对照组(P＜0.05).结论小剂量TBTCl对小鼠免疫系统有刺激增强趋势,大剂量TBT Cl染毒对小鼠免疫系统产生强烈的抑制作用.

Effects of TBTCl on Immune Function of Mice

Objective To study the effect of TBTCl on the immunity of mice. Methods The mice were randomly divided into 5 groups, namely groups of negative control, low dose (0.8 mg/kg), moderate dose (4 mg/kg), high dose (20 mg/kg) and positive control. Gavage was employed to administrate TBTCl to mice for two consecutive weeks, the number of T-lymphocyte in blood and invert ability of T-lymphocytes in spleen, hemolysin in serum, clearance exponent and viscera quotiety were determined to study the effect of TBTCl on immunity of rats. Results Compared with the control, no significantly increased T-lymphocytes were seen in low dose group, in moderate dose group the number of T-lmphocyte and the production of hemolysin increased, no obvious changes in the clearance exponent and viscera quotiety were seen. In high dose group, a significantly decreased T-lymphocytes, the clearance exponent and viscera quotiety were observed. Conclusion Low level TBTCl exposure may stimulate the immune system of mice, high exposed to TBTCl may intensively inhibit the immune system.