中文摘要：

目的通过进一步研究慢性铝暴露引起大鼠海马细胞内[Ca^2＋]i和钙调蛋白激酶激酶Ⅱ（CaM Ⅱ）蛋白表达的变化，来探讨铝损害学习记忆的作用机制。方法选择断乳后Wistar大鼠，以含有不同浓度AlCl3的水进行饲养。3个月后，取海马测定细胞内[Ca^2＋]i，用Western blotting方法检测CaMK Ⅱ的蛋白表达。结果（1）各染铝组的[Ca^2＋]i与对照组比较明显降低，差异有统计学意义（P〈0．01），但各染铝组间差异无统计学意义；（2）各染铝组CaMKⅡ蛋白表达与对照组比较也显著降低，并成剂量关系，差异有统计学意义（P〈0．01）。结论铝能够降低大鼠海马细胞内的[Ca^2＋]i浓度并造成CaMKⅡ的蛋白表达降低，从而损伤学习记忆功能。

英文摘要：

Objective To go deep into the mechanism for chronic aluminum-induced impairments to learning and memory by studying the change of [ Ca^2＋ ]i and concentration of calcium （ [ Ca^2＋ ]i ） calciurrdcalmodulin-dependent kinase Ⅱ （ CaMK Ⅱ ）. Methods The ablactated Wistar rats were used to establish the chrenic-aluminium exposed models by the garages of aluminum chloride （ AlCl3 ） of different concentrations in the drinking water and measured the [ Ca^2＋ ]i in hippocampi of the rats. Western Blot was used to determine CaMK II contents in hippocampi. Results （1） [ Ca^2＋ ]i in AlCl3 exposed groups was obviously lower than that in control group （ P 〈 0.01 ） but there was no significant difference among aluminum treated groups. （2）The content of CaMK II in hippocampus of AlCl3-exposed groups fell down in a dose-dependent manner comparing with that of control group （ P 〈 0.01 ）. Conclusion Chronic aluminum exposure can affect [ Ca^2＋ ]i and CaMKⅡ content, which play most important roles in learning and memory, and impair the ability of learning and memory.