糖皮质激素诱导的小鼠记忆功能低下及其作用机理

被引:6
作者
李卫平
张艳
明亮
陈敏珠
机构
[1] 安徽医科大学药理教研室!合肥
关键词
糖皮质激素; 细胞内钙离子; 钙离子荧光指示剂Fura2/AM; 免疫功能; 记忆功能; 细胞凋亡;
D O I
10.16438/j.0513-4870.1999.11.002
中图分类号
R977.1 [激素类药物];
学科分类号
摘要
目的:研究糖皮质激素(GCOR)诱导小鼠记忆功能降低及其作用机理。方法:采用Fura 2/AM 钙离子荧光指示剂和双波长荧光分光光度计测定细胞内[Ca2+ ]i 浓度;用透射电镜和流式细胞仪分别检测细胞凋亡(PCD) 。结果:GCOR 可分别诱导成年及老龄小鼠机体免疫功能降低,胸腺及脾脏脏器指数减小,老龄动物记忆功能降低,胸腺、海马细胞内Ca2+ 超载,海马神细胞PCD细胞数增加。体外试验结果亦表明,GCOR 可直接诱导T 淋巴细胞和海马神经细胞[Ca2 +]i 超载,细胞凋亡。结论:糖皮质激素可诱导小鼠记忆功能降低。细胞内[Ca2+ ]i 超载可能是引起小鼠免疫功能降低、智力水平下降、衰老和细胞凋亡的主要原因之一。
引用
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页码:806 / 809
页数:4
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