应激对大鼠海马CREB、ERK活性的影响

被引：3

作者：

郑晖

马光瑜

徐小虎

机构：

[1] 广东化工制药职业技术学院

[2] 广东省食品药品监督管理局

[3] 汕头大学医学院法医学教研室

来源：

中华行为医学与脑科学杂志 | 2007年 / 02期

基金：

广东省自然科学基金;

关键词：

应激; 海马; 环磷酸腺苷反应元件结合蛋白; 细胞外信号调节激酶;

D O I：

暂无

中图分类号：

R686 [筋腱、韧带、滑囊疾病及损伤];

学科分类号：

1002 ; 100210 ;

摘要：

目的探讨不同时段的应激对大鼠海马环磷酸腺苷反应元件结合蛋白(CREB)、细胞外信号调节激酶(ERK)活性的影响。方法将成年雄性Sprague Dawley(SD)大鼠随机分为5组:对照组(A)、应激1次组(B)、应激1周组(C)、应激2周组(D)和应激4周组(E),每组动物6只。应激模型为强迫大鼠游泳,每天15min。采用Westernblot检测各组大鼠海马CREB、ERK的磷酸化及总蛋白(p-CREB和t-CREB、p-ERK/MAPK和ERK/MAPK)水平。结果B和C组大鼠海马组织的p-CREB水平与对照组比较差异无显著性(P>0.05);D和E组大鼠海马组织的p-CREB明显低于对照组(P<0.05)。各应激组t-CREB水平与对照组比较均差异无显著性(P>0.05)。C、D和E组大鼠海马p-ERK44和p-ERK42的水平显著低于对照组(P<0.05或P<0.01);B组大鼠海马p-ERK44和p-ERK42的水平与对照组比较差异无显著性(P>0.05)。各应激组和对照组大鼠海马ERK44和ERK42的总蛋白水平比较均差异无显著性(P>0.05)。结论慢性应激降低大鼠海马CREB的活性,短时间和慢性应激均能降低大鼠海马ERK的活性。

引用

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