Dysfunctional SEMA3E signaling underlies gonadotropin-releasing hormone neuron deficiency in Kallmann syndrome.

Détails

ID Serval
serval:BIB_4B4EA20E51A7
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Dysfunctional SEMA3E signaling underlies gonadotropin-releasing hormone neuron deficiency in Kallmann syndrome.
Périodique
Journal of Clinical Investigation
Auteur(s)
Cariboni A., André V., Chauvet S., Cassatella D., Davidson K., Caramello A., Fantin A., Bouloux P., Mann F., Ruhrberg C.
ISSN
1558-8238 (Electronic)
ISSN-L
0021-9738
Statut éditorial
Publié
Date de publication
2015
Peer-reviewed
Oui
Volume
125
Numéro
6
Pages
2413-2428
Langue
anglais
Notes
Publication types: Journal Article Publication Status: ppublish
Résumé
Individuals with an inherited deficiency in gonadotropin-releasing hormone (GnRH) have impaired sexual reproduction. Previous genetic linkage studies and sequencing of plausible gene candidates have identified mutations associated with inherited GnRH deficiency, but the small number of affected families and limited success in validating candidates have impeded genetic diagnoses for most patients. Using a combination of exome sequencing and computational modeling, we have identified a shared point mutation in semaphorin 3E (SEMA3E) in 2 brothers with Kallmann syndrome (KS), which causes inherited GnRH deficiency. Recombinant wild-type SEMA3E protected maturing GnRH neurons from cell death by triggering a plexin D1-dependent (PLXND1-dependent) activation of PI3K-mediated survival signaling. In contrast, recombinant SEMA3E carrying the KS-associated mutation did not protect GnRH neurons from death. In murine models, lack of either SEMA3E or PLXND1 increased apoptosis of GnRH neurons in the developing brain, reducing innervation of the adult median eminence by GnRH-positive neurites. GnRH neuron deficiency in male mice was accompanied by impaired testes growth, a characteristic feature of KS. Together, these results identify SEMA3E as an essential gene for GnRH neuron development, uncover a neurotrophic function for SEMA3E in the developing brain, and elucidate SEMA3E/PLXND1/PI3K signaling as a mechanism that prevents GnRH neuron deficiency.
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/06/2015 13:37
Dernière modification de la notice
20/08/2019 14:59
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