Auto-regulation of estrogen receptor subtypes and gene expression profiling of 17beta-estradiol action in the neuroendocrine axis of male goldfish.

Abstract:

:Auto-regulation of the three goldfish estrogen receptor (ER) subtypes was examined simultaneously in multiple tissues, in relation to mRNA levels of liver vitellogenin (VTG) and brain transcripts. Male goldfish were implanted with a silastic implant containing either no steroid or 17beta-estradiol (E2) (100 microg/g body mass) for one and seven days. Liver transcript levels of ERalpha were the most highly up-regulated of the ERs, and a parallel induction of liver VTG was observed. In the testes (7d) and telencephalon (7d), E2 induced ERalpha. In the liver (1d) and hypothalamus (7d) ERbeta1 was down-regulated, while ERbeta2 remained unchanged under all conditions. Although aromatase B levels increased in the brain, the majority of candidate genes identified by microarray in the hypothalamus (1d) decreased. These results demonstrate that ER subtypes are differentially regulated by E2, and several brain transcripts decrease upon short-term elevation of circulating E2 levels.

journal_name

Mol Cell Endocrinol

authors

Marlatt VL,Martyniuk CJ,Zhang D,Xiong H,Watt J,Xia X,Moon T,Trudeau VL

doi

10.1016/j.mce.2007.10.013

subject

Has Abstract

pub_date

2008-02-13 00:00:00

pages

38-48

issue

1-2

eissn

0303-7207

issn

1872-8057

pii

S0303-7207(07)00405-4

journal_volume

283

pub_type

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