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12 April 2019 Diurnal Rhythm of trek2a Expression is Associated with Diurnal Rhythm of gnrh3 Expression in Zebrafish
Kavinash Loganathan, Shogo Moriya, Ishwar S. Parhar
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Abstract

The two-pore domain potassium ion (K + ) channel-related K + (TREK) channel and melatonin receptors play roles in the regulation of reproduction in zebrafish. Since reproduction is regulated by diurnal rhythms, the TREK family and melatonin receptors may exhibit diurnal rhythms in expression. In this study, we aimed to investigate diurnal variations of the gene expressions of TREK family and melatonin receptors and their associations with kisspeptin and gonadotrophin-releasing hormone (GnRH). Diurnal variations of trek1b, trek2a, trek2b, mt1, mt2, mel1a, kiss2 and gnrh3 expressions were examined by real-time PCR. For reproduction-related genes, kiss2 and gnrh3 exhibited diurnal rhythms. trek2a revealed a diurnal rhythm in the TREK family. mt2 and mel1c exhibited diurnal rhythms in the melatonin receptors. Since Trek2a regulates gnrh3 expression, the diurnal rhythm of gnrh3 expression suggests to be regulated by the diurnal rhythm of trek2a expression.

© 2019 Zoological Society of Japan
Kavinash Loganathan, Shogo Moriya, and Ishwar S. Parhar "Diurnal Rhythm of trek2a Expression is Associated with Diurnal Rhythm of gnrh3 Expression in Zebrafish," Zoological Science 36(2), 167-171, (12 April 2019). https://doi.org/10.2108/zs180111
Received: 9 July 2018; Accepted: 24 October 2018; Published: 12 April 2019
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