Abstract:
:Adult neural stem cells (NSCs) reside in a specialized microenvironment, the subventricular zone (SVZ), which provides them with unique signaling cues to control their basic properties and prevent their exhaustion. While the signaling mechanisms that regulate NSC lineage progression are well characterized, the molecular mechanisms that trigger the activation of quiescent NSCs during homeostasis and tissue repair are still unclear. Here, we uncovered that the NSC quiescent state is maintained by Rho-GTPase Cdc42, a downstream target of non-canonical Wnt signaling. Mechanistically, activation of Cdc42 induces expression of molecules involved in stem cell identity and anchorage to the niche. Strikingly, during a demyelination injury, downregulation of non-canonical Wnt-dependent Cdc42 activity is necessary to promote activation and lineage progression of quiescent NSCs, thereby initiating the process of tissue repair.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Chavali M,Klingener M,Kokkosis AG,Garkun Y,Felong S,Maffei A,Aguirre Adoi
10.1038/s41467-017-02440-0subject
Has Abstractpub_date
2018-01-02 00:00:00pages
36issue
1issn
2041-1723pii
10.1038/s41467-017-02440-0journal_volume
9pub_type
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