中文摘要：

目的研究亚慢性染铝对断乳大鼠神经行为和海马Bcl-2、Fas蛋白表达的影响,以探讨铝对发育中的中枢神经系统的毒性作用及其作用机制。方法对刚断乳清洁级Wistar大鼠通过饮水亚慢性连续染毒12周,采用原子吸收石墨炉法进行血铝和脑铝含量的测定;跳台试验法观察大鼠学习、记忆行为学的改变;免疫组化染色法测定Bcl-2和Fas蛋白表达;HE染色和尼氏染色观察海马CA1区形态学改变。结果随着染铝剂量的增加,染铝组血铝和脑铝浓度显著升高(P<0.05,P<0.01),低、高剂量组之间脑铝也存在显著性差异(P<0.05);大鼠跳台试验的潜伏期随铝暴露剂量增加逐渐缩短,而错误次数逐渐增加,有明显的剂量-效应关系(P<0.01);随着染铝剂量的升高,Bcl-2蛋白的表达下降(P<0.01),而Fas蛋白表达升高(P<0.01),两者均有剂量-效应关系;海马病理切片HE和尼氏染色光镜检查未发现染铝组与对照组相比有明显差异。结论亚慢性铝暴露可以引起发育中大鼠学习记忆能力下降,抑凋亡的Bcl-2蛋白表达下降而促凋亡Fas蛋白表达升高。

英文摘要：

Objective To explore the effect of aluminium on neural behavior and the expressions of apoptosis genes in weaning rats in order to make out the mechanism of damage of CNS development. Methods Weaning Wistar rats were randomly divided into three groups.A1uminium chloride was administrated by water at the doses of 0.2%,0.4% (m/v) for 12 weeks. Aluminium concentrations in blood were determined by atomic absorption spectrophotometry. Platform experiment was used to detect the activities of neural behavior inclu...