TonEBP regulates hyperosmolality-induced arginine vasotocin gene expression in the chick (Gallus domesticus)

Noboru Saito, Mariko Fujii, Kanae Sugiura, Nicoletta Aste, Kiyoshi Shimada

Research output: Contribution to journalArticle

Abstract

Arginine vasotocin (AVT) is expressed mainly in the paraventircular and supraoptic nuclei of the hypothalamus in chicken. This peptide is known to act as an antidiuretic hormone and its gene expression is stimulated by hyperosmolality. However, the transcription factors that regulate the AVT gene expression induced by hyperosmolality are still unknown. In this study, we examined the role of hyper-tonicity enhancer binding protein (TonEBP) in the transcriptional regulation of AVT gene in chicken. TonEBP mRNA expression levels increased at 1 h after salt-loading treatment in the hypothalamus. This increase preceded that in AVT and c-fos mRNA expression. Intracerebroventricular injections of TonEBP antisense oligonucleotides, before the salt-loading treatment, prevented the increase in AVT gene expression. These results, all together, suggest that the transcription factor TonEBP may be involved in the regulation of AVT genes expression in response to a hyperosmotic environment in chicken.

Original languageEnglish
Pages (from-to)334-338
Number of pages5
JournalNeuroscience Letters
Volume468
Issue number3
DOIs
Publication statusPublished - Jan 14 2010
Externally publishedYes

Keywords

  • AVT
  • Chicken
  • Gene expression
  • Hyperosmolality
  • TonEBP

ASJC Scopus subject areas

  • Neuroscience(all)

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