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Leptin and Its Signaling Are Not Involved in Zebrafish Puberty Onset
Hu, Zhe; Ai, Nana; Chen, Weiting; Wong, Queenie Wing Lei; Ge, Wei
2022-01-17
Source PublicationBiology of reproduction
ISSN0006-3363
Volume106Issue:5Pages:928-942
Abstract

Leptin is a peptide hormone secreted from the adipose tissues and its signaling plays a central role in metabolic regulation of growth, especially on fat mass. In addition, leptin is also involved in regulating reproduction in mammals. In teleosts, there are two leptin ligands (lepa and lepb) and one cognate leptin receptor (lepr); however, their functions are still elusive. In this study, we created null-function mutants for lepa, lepb and lepr in zebrafish using CRISPR/Cas9 method and analyzed their phenotypes with emphasis on puberty onset, one major function widely reported for leptin in mammals. We demonstrated that the loss of leptin ligands or their receptor resulted in no obesity from prepubertal stage to adulthood. We then focused on leptin involvement in controlling puberty onset. We first confirmed the somatic threshold for puberty onset in females and proposed a criterion and somatic threshold for male puberty onset. We examined gonadal development and sex maturation in different genotypic combinations including single mutants (lepa-/-, lepb-/- and lepr-/-), double mutants (lepa-/-;lepb-/-) and triple mutants (lepa-/-;lepb-/-;lepr-/-). Our results showed that once the fish reached the thresholds, the siblings of all genotypes displayed comparable gonadal development in both sexes without obvious signs of changed puberty onset. In conclusion, this comprehensive genetic study on the lep-lepr system demonstrated that in contrast to its counterpart in mammals, leptin system plays little role in controlling growth and reproduction especially puberty onset in zebrafish.

DOI10.1093/biolre/ioac005
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaReproductive Biology
WOS SubjectReproductive Biology
WOS IDWOS:000757926000001
Scopus ID2-s2.0-85130643232
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Document TypeJournal article
CollectionFaculty of Health Sciences
Corresponding AuthorGe, Wei
AffiliationDepartment of Biomedical Sciences and Centre of Reproduction, Development and Aging (CRDA), Faculty of Health Sciences, University of Macau, Taipa, Macau 999078, China
First Author AffilicationCentre of Reproduction, Development and Aging
Corresponding Author AffilicationCentre of Reproduction, Development and Aging
Recommended Citation
GB/T 7714
Hu, Zhe,Ai, Nana,Chen, Weiting,et al. Leptin and Its Signaling Are Not Involved in Zebrafish Puberty Onset[J]. Biology of reproduction,2022,106(5):928-942.
APA Hu, Zhe,Ai, Nana,Chen, Weiting,Wong, Queenie Wing Lei,&Ge, Wei.(2022).Leptin and Its Signaling Are Not Involved in Zebrafish Puberty Onset.Biology of reproduction,106(5),928-942.
MLA Hu, Zhe,et al."Leptin and Its Signaling Are Not Involved in Zebrafish Puberty Onset".Biology of reproduction 106.5(2022):928-942.
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