Androgen Regulation of Hypothalamic Neurons Containing Gonadotropin-Releasing Hormone in a Cichlid Fish: Integration with Social Cues

1996 ◽  
Vol 30 (3) ◽  
pp. 216-226 ◽  
Author(s):  
Kiran K. Soma ◽  
Richard C. Francis ◽  
John C. Wingfield ◽  
Russell D. Fernald
Keyword(s):  
Cichlid Fish ◽  
Gonadotropin Releasing Hormone ◽  
Social Cues ◽  
Hypothalamic Neurons ◽  
Releasing Hormone ◽  
Androgen Regulation

scholarly journals Regulation of gonadotropin-releasing hormone-1 gene transcription by members of the purine-rich element-binding protein family

2010 ◽  
Vol 298 (3) ◽  
pp. E524-E533 ◽  
Author(s):  
Sheng Zhao ◽  
Robert J. Kelm ◽  
Russell D. Fernald
Keyword(s):  
Gene Transcription ◽  
Peptide Mapping ◽  
Cichlid Fish ◽  
Gonadotropin Releasing Hormone ◽  
Protein Family ◽  
Upstream Region ◽  
Mrna Levels ◽  
Releasing Hormone

Gonadotropin-releasing hormone-1 (GnRH1) controls reproduction by stimulating the release of gonadotropins from the pituitary. To characterize regulatory factors governing GnRH1 gene expression, we employed biochemical and bioinformatics techniques to identify novel GnRH1 promoter-binding proteins from the brain of the cichlid fish, Astatotilapia burtoni ( A. burtoni ). Using an in vitro DNA-binding assay followed by mass spectrometric peptide mapping, we identified two members of the purine-rich element-binding (Pur) protein family, Purα and Purβ, as candidates for GnRH1 promoter binding and regulation. We found that transcripts for both Purα and Purβ colocalize in GnRH1-expressing neurons in the preoptic area of the hypothalamus in A. burtoni brain. Furthermore, we confirmed in vivo binding of endogenous Purα and Purβ to the upstream region of the GnRH1 gene in A. burtoni brain and mouse neuronal GT1–7 cells. Consistent with the relative promoter occupancy exhibited by endogenous Pur proteins, overexpression of Purβ, but not Purα, significantly downregulated GnRH1 mRNA levels in transiently transfected GT1–7 cells, suggesting that Purβ acts as a repressor of GnRH1 gene transcription.

Selective cleavage of ErbB4 by G-protein-coupled Gonadotropin-Releasing Hormone Receptor in Cultured Hypothalamic Neurons

2012 ◽  
Vol 227 (6) ◽  
pp. 2492-2501 ◽  
Author(s):  
Sayomi Higa-Nakamine ◽  
Noriko Maeda ◽  
Seikichi Toku ◽  
Tomoko Yamamoto ◽  
Matee Yingyuenyong ◽  
...  
Keyword(s):  
G Protein ◽  
Hormone Receptor ◽  
Gonadotropin Releasing Hormone ◽  
Hypothalamic Neurons ◽  
Releasing Hormone ◽  
Gonadotropin Releasing Hormone Receptor ◽  
G Protein Coupled
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