Back to Search Start Over

Molecular characterization and expression analysis of thyroid hormone receptors in protogynous rice field eel, Monopterus albus.

Authors :
Feng K
Su J
Sun L
Guo Y
Peng X
Source :
Journal of experimental zoology. Part A, Ecological and integrative physiology [J Exp Zool A Ecol Integr Physiol] 2024 Oct; Vol. 341 (8), pp. 845-855. Date of Electronic Publication: 2024 Jun 10.
Publication Year :
2024

Abstract

Thyroid hormones (THs) play important roles in growth, development, morphogenesis, reproduction, and so on. They are mainly meditated by binding to thyroid hormone receptors (TRs) in vertebrates. As important members of the nuclear receptor superfamily, TRs and their ligands are involved in many biological processes. To investigate the potential roles of TRs in the gonadal differentiation and sex change, we cloned and characterized the TRs genes in protogynous rice field eel (Monopterus albus). In this study, three types of TRs were obtained, which were TRαA, TRαB and TRβ, encoding preproproteins of 336-, 409- and 415-amino acids, respectively. Multiple alignments of the three putative TRs protein sequences showed they had a higher similarity. Tissue expression analysis showed that TRαA mainly expressed in the gonad, while TRαB and TRβ in the brain. During female-to-male sex reversal, the expression levels of all the three TRs showed a similar trend of increase followed by a decrease in the gonad. Intraperitoneal injection of triiodothyronine (T3) stimulated the expression of TRαA and TRαB, while it had no significant change on the expression of TRβ in the ovary. Gonadotropin-releasing hormone analogue (GnRHa) injection also significantly upregulated the expression levels of TRαA and TRαB after 6 h, while it had no significant effect on TRβ. These results demonstrated that TRs were involved in the gonadal differentiation and sex reversal, and TRα may play more important roles than TRβ in reproduction by the regulation of GnRHa in rice field eel.<br /> (© 2024 Wiley Periodicals LLC.)

Details

Language :
English
ISSN :
2471-5646
Volume :
341
Issue :
8
Database :
MEDLINE
Journal :
Journal of experimental zoology. Part A, Ecological and integrative physiology
Publication Type :
Academic Journal
Accession number :
38855856
Full Text :
https://doi.org/10.1002/jez.2825