Abstract:
:Tight regulation of the balance between self-renewal and differentiation of neural stem cells is crucial to assure proper neural development. In this context, Notch signaling is a well-known promoter of stemness. In contrast, the bifunctional brain-enriched microRNA miR-9/9(∗) has been implicated in promoting neuronal differentiation. Therefore, we set out to explore the role of both regulators in human neural stem cells. We found that miR-9/9(∗) decreases Notch activity by targeting NOTCH2 and HES1, resulting in an enhanced differentiation. Vice versa, expression levels of miR-9/9(∗) depend on the activation status of Notch signaling. While Notch inhibits differentiation of neural stem cells, it also induces miR-9/9(∗) via recruitment of the Notch intracellular domain (NICD)/RBPj transcriptional complex to the miR-9/9(∗)_2 genomic locus. Thus, our data reveal a mutual interaction between bifunctional miR-9/9(∗) and the Notch signaling cascade, calibrating the delicate balance between self-renewal and differentiation of human neural stem cells.
journal_name
Stem Cell Reportsjournal_title
Stem cell reportsauthors
Roese-Koerner B,Stappert L,Berger T,Braun NC,Veltel M,Jungverdorben J,Evert BO,Peitz M,Borghese L,Brüstle Odoi
10.1016/j.stemcr.2016.06.008subject
Has Abstractpub_date
2016-08-09 00:00:00pages
207-19issue
2issn
2213-6711pii
S2213-6711(16)30100-Xjournal_volume
7pub_type
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