Auto-regulation of thyroid hormone receptors in the goldfish ovary and testis

Erik R. Nelson, Euan R.O. Allan, Flora Y. Pang, Hamid R. Habibi

Research output: Contribution to journalArticle

Abstract

Thyroid hormones, acting via their cognate thyroid receptors (TRs) act as mediators and modulators of several physiological processes and homeostasis. A clear role for the TRs in reproduction has not yet been established although several lines of recent evidence suggest that they are involved in the regulation of reproduction. To further study the role of TRs in control of reproduction, we investigated homologous regulation of TR subtypes in the gonads of goldfish, in vivo and in vitro. It was found that tri-iodothyronine (T3) down-regulates the traditional TRs (TRα-1 and TRβ) and up-regulates a dominant-negative form, TRα-t. This indicates a 'feedback' mechanism whereby an acute treatment with T3 down regulates further T3 mediated response. The results provide novel information on auto-regulation of TRs in the goldfish ovary and testis, and support the hypothesis that thyroid hormones are involved in the control of reproduction.

Original languageEnglish (US)
Pages (from-to)50-55
Number of pages6
JournalGeneral and Comparative Endocrinology
Volume172
Issue number1
DOIs
StatePublished - May 15 2011

Keywords

  • Goldfish
  • Gonads
  • Regulation
  • Reproduction
  • Thyroid hormone
  • Thyroid receptor

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Endocrinology

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