目的：观察微管相关蛋白1轻链3Ⅱ(LC3Ⅱ)与微管相关蛋白2(MAP-2)在血管性痴呆大鼠海马CA1区的表达及变化情况。方法48只Sprague-Dawley大鼠随机分为假手术组和模型组(血管性痴呆模型)，每组大鼠又随机分为模型制备成功后1、2、4和8周4个亚组，每个亚组6只。采用四血管阻断法制备大鼠血管性痴呆模型。免疫组化法检测LC3Ⅱ与MAP-2的表达。结果与假手术组比较，模型组各时间点LC3Ⅱ表达均显著增高(P<0.001)，MAP-2表达均显著减少(P<0.001)。模型组各时间点大鼠海马CA1区LC3Ⅱ与MAP-2的蛋白表达呈负相关(r=-0.723, P<0.001)。结论 LC3Ⅱ蛋白在海马CA1区过度表达，MAP-2蛋白表达减少，这可能是血管性痴呆发生、发展的重要机制之一。%Objective To observe the expression of microtubule-associated protein 1 light chain 3 II (LC3II) and microtubule-associated protein 2 (MAP-2) in CA1 area of hippocampus in vascular dementia rats. Methods 48 Sprague-Dawley rats were randomly divided into sham group and model group. Meanwhile, each group was further divided into 1, 2, 4 and 8 weeks subgroups (n=6). Vascular dementia mod-el was established by blocking four vessels. The expressions of LC3II and MAP-2 protein were detected with immunohistochemistry in the CA1 area of hippocampus. Results The expression of LC3II significantly increased, and the expression of MAP-2 decreased in the model group compared with the sham group at every time point (P<0.001). The expression of LC3II was negatively correlated with MAP-2 at ev-ery time point in the model group (r=-0.723, P<0.05). Conclusion It may play an important role for the occurrence and development of vas-cular dementia that the expression of LC3II increased and MAP-2 descreased in CA1 area of hippocampus in rats.
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