EXPRESSION PATTERNS OF ESTROGEN RECEPTORS IN THE CENTRAL AUDITORY SYSTEM CHANGE IN PREPUBERTAL AND AGED MICE

被引:18
作者
Charitidi, K. [1 ]
Frisina, R. D. [2 ,3 ]
Vasilyeva, O. N. [2 ,3 ]
Zhu, X. [2 ,3 ]
Canlon, B. [1 ]
机构
[1] Karolinska Inst, Dept Physiol & Pharmacol, S-17177 Stockholm, Sweden
[2] Univ Rochester, Sch Med, Dept Otolaryngol, Biomed Engn & Neurobiol & Anat, Rochester, NY 14642 USA
[3] Univ Rochester, Sch Med, Int Ctr Hearing & Speech Res, Rochester, NY 14642 USA
基金
瑞典研究理事会;
关键词
hearing; brain; sex dimorphism; western blot; auditory brainstem response; hearing loss; PRODUCT OTOACOUSTIC EMISSIONS; BRAIN-STEM RESPONSE; CONTRALATERAL SUPPRESSION; SEX-DIFFERENCES; HEARING-LOSS; MOUSE-BRAIN; ALPHA; BETA; HYPOTHALAMUS; ESTRADIOL;
D O I
10.1016/j.neuroscience.2010.08.010
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Estrogens are important in the development, maintenance and physiology of the CNS. Several studies have shown their effects on the processing of hearing in both males and females, and these effects, in part, are thought to result from regulation of the transcription of genes via their classical estrogen receptor (ER) pathway. In order to understand the spatiotemporal changes that occur with age, we have studied the expression of ERs in the central auditory pathway in prepubertal and aged CBA mice with immunohistochemistry. In prepubertal mice a clear dichotomy was noted between the expression of ER alpha and ER beta. ER beta-positive neurons were found in the metencephalon whereas the majority of ER alpha was found in mesencephalon, diencephalon or the telencephalon. In the aged animals a different pattern of ER expression was found in terms of location and overall intensity. These age-induced changes in the expression pattern were generally not uniform, suggesting that region-specific mechanisms regulate the ERs' age-related expression. Neither the prepubertal nor the aged animals showed sex differences in any auditory structure. Our results demonstrate different age-dependent spatial and temporal changes in the pattern of expression of ER alpha and ER beta, suggesting that each ER type may be involved in distinct roles across the central auditory pathway in different periods of maturation. (C) 2010 IBRO. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1270 / 1281
页数:12
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