An aminopeptidase in the Drosophila testicular niche acts in germline stem cell maintenance and spermatogonial dedifferentiation

Abstract: Extrinsic cues from the niche are known to regulate adult stem cell self-renewal versus differentiation. Here, we report that an aminopeptidase Slamdance (Sda) acts in the Drosophila testicular niche to maintain germline stem cells (GSCs) and regulate progenitor germ cell dedifferentiation. Mutations in sda lead to dramatic testicular niche deterioration and stem cell loss. Recombinant Sda has specific aminopeptidase activity in vitro, and the in vivo function of Sda requires an intact aminopeptidase domain. Sda is required for accumulation of mature DE-cadherin, and overexpression of DE-cadherin rescues most sda mutant phenotypes, suggesting that DE-cadherin is an important target of Sda. Finally, Sda is both necessary and sufficient to promote dedifferentiation during aging and recovery from genetically manipulated depletion of GSCs. Together, our results suggest that a niche factor promotes both stem cell maintenance and progenitor cell dedifferentiation

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
Cell reports. - 13, 2 (2015) , 315-325, ISSN: 2211-1247

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2019
Urheber
Lim, Cindy
Gandhi, Shiv
Biniossek, Martin Lothar
Feng, Lijuan
Schilling, Oliver
Urban, Siniša
Chen, Xin
Beteiligte Personen und Organisationen
Zentrum für Biochemie und Molekulare Zellforschung

DOI
10.1016/j.celrep.2015.09.001
URN
urn:nbn:de:bsz:25-freidok-1281647
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:25 MESZ

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Beteiligte

Entstanden

  • 2019

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