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SMAD3 Regulates follicle-stimulating hormone synthesis by pituitary gonadotrope cells in vivo
Li Y.2; Schang G.2; Boehm U.1; Deng C.-X.4; Graff J.3; Bernard D.J.2
2017-02-10
Source PublicationJournal of Biological Chemistry
ISSN1083351X 00219258
Volume292Issue:6Pages:2301-2314
Abstract

Pituitary follicle-stimulating hormone (FSH) is an essential regulator of fertility in females and of quantitatively normal spermatogenesis in males. Pituitary-derived activins are thought to act as major stimulators of FSH synthesis by gonadotrope cells. In vitro, activins signal via SMAD3, SMAD4, and forkhead box L2 (FOXL2) to regulate transcription of the FSHβ subunit gene (Fshb). Consistent with this model, gonadotrope-specific Smad4 or Foxl2 knock-out mice have greatly reduced FSH and are subfertile. The role of SMAD3 in vivo is unresolved; however, residual FSH production in Smad4 conditional knock-out mice may derive from partial compensation by SMAD3 and its ability to bind DNA in the absence of SMAD4. To test this hypothesis and determine the role of SMAD3 in FSH biosynthesis, we generated mice lacking both the SMAD3 DNA binding domain and SMAD4 specifically in gonadotropes. Conditional knock-out females were hypogonadal, acyclic, and sterile and had thread-like uteri; their ovaries lacked antral follicles and corpora lutea. Knock-out males were fertile but had reduced testis weights and epididymal sperm counts. These phenotypes were consistent with those of Fshb knock-out mice. Indeed, pituitary Fshb mRNA levels were nearly undetectable in both male and female knock-outs. In contrast, gonadotropin-releasing hormone receptor mRNA levels were significantly elevated in knock-outs in both sexes. Interestingly, luteinizing hormone production was altered in a sex-specific fashion. Overall, our analyses demonstrate that SMAD3 is required for FSH synthesis in vivo.

DOI10.1074/jbc.M116.759167
URLView the original
Indexed BySCI
Language英语
WOS Research AreaBiochemistry & Molecular Biology
WOS SubjectBiochemistry & Molecular Biology
WOS IDWOS:000395530300022
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Cited Times [WOS]:15   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionFaculty of Health Sciences
Corresponding AuthorBernard D.J.
Affiliation1.Universitatsklinikum des Saarlandes Medizinische Fakultat der Universitat des Saarlandes
2.McGill University
3.UT Southwestern Medical Center
4.Universidade de Macau
Recommended Citation
GB/T 7714
Li Y.,Schang G.,Boehm U.,et al. SMAD3 Regulates follicle-stimulating hormone synthesis by pituitary gonadotrope cells in vivo[J]. Journal of Biological Chemistry,2017,292(6):2301-2314.
APA Li Y.,Schang G.,Boehm U.,Deng C.-X.,Graff J.,&Bernard D.J..(2017).SMAD3 Regulates follicle-stimulating hormone synthesis by pituitary gonadotrope cells in vivo.Journal of Biological Chemistry,292(6),2301-2314.
MLA Li Y.,et al."SMAD3 Regulates follicle-stimulating hormone synthesis by pituitary gonadotrope cells in vivo".Journal of Biological Chemistry 292.6(2017):2301-2314.
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