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 Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Marlatt VL,Martyniuk CJ,Zhang D,Xiong H,Watt J,Xia X,Moon T,Trudeau VLdoi
10.1016/j.mce.2007.10.013subject
Has Abstractpub_date
2008-02-13 00:00:00pages
38-48issue
1-2eissn
0303-7207issn
1872-8057pii
S0303-7207(07)00405-4journal_volume
283pub_type
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