Loss of the limbic mineralocorticoid receptor impairs behavioral plasticity

被引:214
作者
Berger, S
Wolfer, DP
Selbach, O
Alter, H
Erdmann, G
Reichardt, HM
Chepkova, AN
Welzl, H
Haas, HL
Lipp, HP
Schütz, G
机构
[1] German Canc Res Ctr, Div Mol Biol Cell 1, D-69120 Heidelberg, Germany
[2] Univ Zurich, Inst Anat, CH-8057 Zurich, Switzerland
[3] Univ Dusseldorf, Dept Neurophysiol, D-40001 Dusseldorf, Germany
关键词
behavior; neuroendocrine; synaptic plasticity;
D O I
10.1073/pnas.0503878102
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Corticosteroid action in the brain is mediated by the mineralocorticoid (MR) and the glucocorticoid (GR) receptor. Disturbances in MR- and GR-mediated effects are thought to impair cognition, behavior, and endocrine control. To assess the function of the limbic MR in these processes, we inactivated the MR gene in the forebrain of the mouse using the Cre/loxP-recombination system. We screened the mice with a limbic MR deficiency in various learning and exploration tests. The mutant mice show impaired learning of the water-maze task and deficits in measures of working memory on the radial maze due to behavioral perseverance and stereotypy. They exhibit a hyperreactivity toward a novel object but normal anxiety-like behavior. The behavioral changes are associated with abnormalities of the mossy fiber projection and an up-regulation of GR expression in the hippocampus. Adult mutant mice show normal corticosterone levels at circadian trough and peak. This genetic model provides important information about the consequences of a permanently altered balance between limbic MR and GR, with implications for stress-related neuroendocrine and neuropsychiatric diseases.
引用
收藏
页码:195 / 200
页数:6
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