Ghrelin regulates hyperactivity-like behaviors via growth hormone signaling pathway in zebrafish ( Danio rerio )
Ghrelin is originally identified as the endogenous ligand for the growth hormone secretagogue receptor (GHSR) and partially acts by stimulating growth hormone (GH) release. Our previous studies have identified as a novel susceptibility gene for human attention-deficit hyperactivity disorder (ADHD),...
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Published in | Frontiers in endocrinology (Lausanne) Vol. 14; p. 1163263 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
Frontiers Media S.A
31.03.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Ghrelin is originally identified as the endogenous ligand for the growth hormone secretagogue receptor (GHSR) and partially acts by stimulating growth hormone (GH) release. Our previous studies have identified
as a novel susceptibility gene for human attention-deficit hyperactivity disorder (ADHD), and
-depleted zebrafish (
) display ADHD-like behaviors. However, the underlying molecular mechanism how ghrelin regulates hyperactivity-like behaviors is not yet known.
Here, we performed RNA-sequencing analysis using adult
zebrafish brains to investigate the underlying molecular mechanisms. We found that
mRNA and genes related to the
signaling pathway were significantly reduced at transcriptional expression levels. Quantitative polymerase chain reaction (qPCR) was performed and confirmed the downregulation of
signaling pathway-related genes in
zebrafish larvae and the brain of adult
zebrafish. In addition,
zebrafish displayed hyperactive and hyperreactive phenotypes, such as an increase in motor activity in swimming test and a hyperreactive phenotype under light/dark cycle stimulation, mimicking human ADHD symptoms. Intraperitoneal injection of recombinant human growth hormone (rhGH) partially rescued the hyperactivity and hyperreactive-like behaviors in
mutant zebrafish.
Our results indicated that ghrelin may regulate hyperactivity-like behaviors by mediating
signaling pathway in zebrafish. And the protective effect of rhGH on
zebrafish hyperactivity behavior provides new therapeutic clues for ADHD patients. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Reviewed by: Jingjing Tian, Pearl River Fisheries Research Institute (CAFS), China; Xiangyan Dai, Southwest University, China; Junjie Wu, Yunnan Institute of Fishery Sciences Research, China These authors have contributed equally to this work Edited by: Jie Mei, Huazhong Agricultural University, China This article was submitted to Experimental Endocrinology, a section of the journal Frontiers in Endocrinology |
ISSN: | 1664-2392 1664-2392 |
DOI: | 10.3389/fendo.2023.1163263 |