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产前应激子代大鼠海马核转录因子--#kappa#B表达的性别差异

李晖, 朱忠良, 贾宁, 白转丽, 蔡青, 陈蕊, 宋天保, 刘健康

西安交通大学医学院人体解剖学与组织胚胎学系.陕西,西安 710061；西安交通大学医学院第一附属医院儿科.陕西,西安 710061；西安交通大学医学院生理学与病理生理学系.陕西,西安 710061；中科院上海生命科学研究院营养研究所.上海 200031

摘要

该研究采用免疫组织化学和Western blot检测NF--#kappa#B p65/p50在产前应激子代海马的表达，并探讨其表达是否存在性别差异。研究结果显示，在雌性子代，中、晚期应激组海马齿状回p65表达显著低于对照组（{sl P}<0.01），而海马各区p50表达均显著高于对照组（{sl P}<0.01），中、晚期应激组间p65和p50表达均有显著差异（{sl P}<0.01）。在雄性子代，中、晚期应激组海马齿状回p65表达显著高于对照组（{sl P}<0.01），晚期应激组海马各区p50表达均显著低于对照组（{sl P}<0.05，{sl P}<0.01），中、晚期应激组间p65和p50表达均有显著差异（{sl P}<0.01）。雌、雄子代比较，对照组雌、雄p65表达差异极显著({sl P}0.01），p50仅在海马CA1区表达差异极显著（{sl P}<0.01）；中期应激组雌、雄子代大鼠海马p65／p50表达无显著差异；晚期应激组雌、雄海马p65／p50表达均有极显著差异（{sl P}<0.01）。Western blot与免疫组织化学结果基本一致。结果表明，产前不同时期的应激显著影响子代海马NF--#kappa#B p65和p50表达，且有性别差异，这可能是产前应激对子代雌、雄大鼠学习记忆能力影响差异的机制之一。

关键词： 核转录因子-#kappa#B; 产前应激; 性别差异; 海马

Gender--dependent difference of NF--#kappa#B expression in the hippocampus of prenatally stressed offspring rats

Li Hui, Zhu Zhongliang, Jia Ning, Bai Zhuanli, Cai Qing, Chen Rui, Song Tianbao, Liu Jiankang

Department of Human Anatomy and Histology-Embryology,School of Medicine, Xi'an Jiaotong University.Xi'an 710061,Shaanxi；China；Department of Physiology and Pathophysiology, School of Medicine, Xi'an Jiaotong University.Xi'an 710061,Shaanxi

Abstract

In this study, immunohistochemistry and Western blot were used to determine whether the expression of NF-#kappa#B in the hippoeampus of prenatally stressed offspring rats is gender-dependent. The results were as follows： In the female offspring rats, the expressions of D65 in the hippoeampal dentate gyms in mid-term stress （MS） and late-term stress （LS） groups were significantly less than that in the control group （P〈0.01）. There was a significant difference between MS and LS groups （P〈0.01）. The expressions of p50 in all regions of hippoeampus in MS and LS groups were significantly more than that in the control group （P〈0.01）. A significant difference was also present between MS and LS groups （P〈0.01）. In the male offspring rats, the expressions of D65 in the hippoeampal dentate gyrus in MS and LS groups were evidently more than that in the control group （P〈0.01）. There was a significant difference between MS and LS groups （P〈0.01）. The expressions of p50 in all regions of hippocampus in MS and LS groups were significantly less than that in the control group （P〈0.05, P〈0.01）. There was also a significant difference in p65 expression between MS and LS groups （P〈0.01）. In addition, in the control group the expressions of p65 in the hippoeampal dentate gyms of female offspring rats were significantly more than that of male ones （P〈0.01）. However, in LS group the expressions of p65 in the hippoeampal dentate gyms of female offspring rats were significantly less than that of male ones （P〈0.01）. Moreover, there was no significant difference in p65 expression between female and male offspring rats in MS group. In the control group the gender difference in the expression of p50 was only observed in hippocampal CA1 （P〈0.01）. The expressions of p50 in all regions of hippocampus of female offspring rats were significantly more than that of male ones in LS group （P〈0.01）. There was no significant difference in p50 expression between female and male offspring rats in MS group. The results of Western blot were similar to those of immunohistochemical study. These results indicate that prenatal stress in different gestational periods significantly affects the expressions of p65 and p50 in hippocampus, and this effect is gender-dependent. This may be one of the mechanisms underlying the gender difference in the ability of learning and memory of the prenatally stressed offspring rats.

Key words: NF-#kappa#B;prenatal stress;sexual distinction;Hippocampus

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引用本文：

李晖, 朱忠良, 贾宁, 白转丽, 蔡青, 陈蕊, 宋天保, 刘健康. 产前应激子代大鼠海马核转录因子--#kappa#B表达的性别差异[J]. 生理学报 2006; 58 (6): .

Li Hui, Zhu Zhongliang, Jia Ning, Bai Zhuanli, Cai Qing, Chen Rui, Song Tianbao, Liu Jiankang. Gender--dependent difference of NF--#kappa#B expression in the hippocampus of prenatally stressed offspring rats. Acta Physiol Sin 2006; 58 (6): (in Chinese with English abstract).