【摘要】 目的研究N-甲基-D-天门冬氨酸受体(NMDAR)亚单位2A和2B在阿尔茨海默病(AD)样大鼠海马的表达及其与细胞凋亡的关系。方法以Aβ1-40和A lC l3双干预方法建立AD样大鼠模型。采用免疫组化法检测NMDAR2B及NMDAR2A在AD样大鼠海马的表达,采用TUNEL法检测AD样大鼠海马细胞凋亡状况,并探讨二者的关系。结果在AD样大鼠海马各区NMDAR2B表达均显著增高(P(0.05),CA1区最高,NMDAR2A未见显著变化(P>0.05),凋亡阳性细胞均显著增多,CA1区最多,其次为齿状回和CA3区(P(0.05)。结论 NMDAR2B在AD样大鼠海马表现为病理性高表达且与细胞凋亡以及选择性易损伤现象之间很可能存在着某种密切的关系。更多还原

【Abstract】 Objective:To explore expressions of N-methyl-D-aspartate receptor subunits 2B(NR2B) and 2A(NR2A) and their relationship with apoptosis in the hippocampus of Alzheimer′s disease(AD)-like rats.Methods:The AD-like rat model was established by intracerebroventricularly injecting Aβ1-40 and intraperitoneally injecting AlCl3.Expressions of NR2B and NR2A in the AD-like rat hippocampus were detected by immunohistochemistry,and the apoptosis in the AD-like rat hippocampus was detected by TUNEL staining.Then the relationship was further explored between them.Results:Expression of NR2B was significantly increased in the AD-like rat hippocampus(P﹤0.05),especially in the CA1 subfield.Expression of NR2A had no significant change in the AD-like rat hippocampus(P>0.05).Apoptotic cells were significantly increased in the AD-like rat hippocampus(P﹤0.05),especially in the CA1 subfield,followed by the dentate gyrus and the CA3 subfield.Conclusion:NR2B,not NR2A,has pathological high expression in the AD-like rat hippocampus.This pathological high expression may have a specific relationship with AD-like apoptosis and the selective vulnerable phenomenon of the rat hippocampus.更多还原