Circadian rhythm of melatonin secretion and growth-related gene expression in the tiger puffer Takifugu rubripes SCOPUS KCI

Title
Circadian rhythm of melatonin secretion and growth-related gene expression in the tiger puffer Takifugu rubripes
Author(s)
Kim, B.-H.; Hur, S.-P.; Hur, S.-W.; Takeuchi, Y.; Takemura, A.; Lee, Y.-D.
KIOST Author(s)
Hur, Sung Pyo(허성표)
Publication Year
2017
Abstract
Somatostatin (SS) and growth hormone-releasing hormone (GHRH) are primary factors regulating growth hormone (GH) secretion in the pituitary. To date, it remains unknown how this rhythm is controlled endogenously, although there must be coordination of circadian manners. Melatonin was the main regulator in biological rhythms, and its secretion has fluctuation by photic information. But relationship between melatonin and growth-related genes (ghrh and ss) is unclear. We investigated circadian rhythms of melatonin secretion, ghrh and ss expressions, and correlation between melatonin with growth-related genes in tiger puffer Takifugu rubripes. The melatonin secretion showed nocturnal rhythms under light and dark (LD) conditions. In constant light (LL) condition, melatonin secretion has similar patterns with LD conditions. ss1 mRNA was high during scotophase under LD conditions. But ss1 rhythms disappeared in LL conditions. Ghrh appeared opposite expression compared with melatonin levels or ss1 expression under LD and LL. In the results of the melatonin injection, ghrh and ss1 showed no significant expression compared with control groups. These results suggested that melatonin and growth-related genes have daily or circadian rhythms in the tiger puffer. Further, we need to know mechanisms of each ss and ghrh gene regulation. © 2017 The Author(s).
ISSN
2234-1749
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1324
DOI
10.1186/s41240-017-0061-0
Bibliographic Citation
Fisheries and Aquatic Sciences, v.20, no.1, 2017
Publisher
BioMed Central Ltd.
Keywords
GHRH; Melatonin; Photoperiod; Somatostatin; Tiger puffer
Type
Article
Language
English
Document Type
Article
Publisher
BioMed Central Ltd.
Related Researcher
Research Interests

Marine animal endocrine,Marine animal physiology,Marine animal histology,해양생물 내분비,해양생물 생리,해양생물 조직학

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