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Genetic Analysis of Zebrafish Gonadotropin (FSH and LH) Functions by TALEN-Mediated Gene Disruption
Zhang, Zhiwei1,2; Zhu, Bo1; Ge, Wei1,2
2015-01
Source PublicationMOLECULAR ENDOCRINOLOGY
ISSN0888-8809
Volume29Issue:1Pages:76-98
Abstract

Vertebrate reproduction is controlled by two gonadotropins (FSH and LH) from the pituitary. Despite numerous studies on FSH and LH in fish species, their functions in reproduction still remain poorly defined. This is partly due to the lack of powerful genetic approaches for functional studies in adult fish. This situation is now changing with the emergence of genome-editing technologies, especially Transcription Activator-Like Effector Nuclease (TALEN) and Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR). In this study, we deleted the hormone-specific beta-genes of both FSH and LH in the zebrafish using TALEN. This was followed by a phenotype analysis for key reproductive events, including gonadal differentiation, puberty onset, gametogenesis, final maturation, and fertility. FSH-deficient zebrafish (fshb(-/-)) were surprisingly fertile in both sexes; however, the development of both the ovary and testis was significantly delayed. In contrast, LH-deficient zebrafish (lhb(-/-)) showed normal gonadal growth, but the females failed to spawn and were therefore infertile. Using previtellogenic follicles as the marker, we observed a significant delay of puberty onset in the fshb mutant but not the lhb mutant females. Interestingly, FSH seemed to play a role in maintaining the female status because we repeatedly observed sexual reversal in the fshb mutant. Neither the fshb nor lhb mutation alone seemed to affect gonadal differentiation; however, the double mutation of the two genes led to all males, although the development of the testis was significantly delayed. In summary, our data confirmed some well-known functions of FSH and LH in fish while also providing evidence for novel functions, which would be difficult to reveal using traditional biochemical and physiological approaches.

DOI10.1210/me.2014-1256
URLView the original
Indexed BySCIE
Language英语
WOS Research AreaEndocrinology & Metabolism
WOS SubjectEndocrinology & Metabolism
WOS IDWOS:000351926700008
PublisherENDOCRINE SOC
Fulltext Access
Citation statistics
Cited Times [WOS]:96   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorGe, Wei
Affiliation1.School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
2.Faculty of Health Sciences, University of Macau, Taipa, Macau, China
First Author AffilicationFaculty of Health Sciences
Corresponding Author AffilicationFaculty of Health Sciences
Recommended Citation
GB/T 7714
Zhang, Zhiwei,Zhu, Bo,Ge, Wei. Genetic Analysis of Zebrafish Gonadotropin (FSH and LH) Functions by TALEN-Mediated Gene Disruption[J]. MOLECULAR ENDOCRINOLOGY,2015,29(1):76-98.
APA Zhang, Zhiwei,Zhu, Bo,&Ge, Wei.(2015).Genetic Analysis of Zebrafish Gonadotropin (FSH and LH) Functions by TALEN-Mediated Gene Disruption.MOLECULAR ENDOCRINOLOGY,29(1),76-98.
MLA Zhang, Zhiwei,et al."Genetic Analysis of Zebrafish Gonadotropin (FSH and LH) Functions by TALEN-Mediated Gene Disruption".MOLECULAR ENDOCRINOLOGY 29.1(2015):76-98.
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