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PLoS One. 2013 Apr 10;8(4):e60937. doi: 10.1371/journal.pone.0060937. Print 2013.

miRNA let-7e modulates the Wnt pathway and early nephrogenic markers in mouse embryonic stem cell differentiation.

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  • 1Departament of Experimental Pathology, Instituto de Investigaciones Biomédicas de Barcelona (IIBB-CSIC, IDIBAPS), Barcelona, Spain. vinasmjose@gmail.com

Abstract

This study indicates that embryonic stem cells [ESCs] cultured with retinoic acid and activin A significantly upregulate the miRNA let-7e. This specific miRNA modulates the Wnt pathway and the expression of early nephrogenic markers under these differentiation conditions. The differentiation markers WT1, Pax2 and Wnt4 were downregulated when miRNA let-7e was silenced, thus indicating the role of miRNA let-7e in the differentiation process. PKCβ, GSK3β phosphorylation (GSK3β(P)) and β-catenin expression was reduced in differentiated cells and reversed by miRNA let-7e silencing. Addition of a PKCβ inhibitor to the miRNA let-7e silenced cells abolished let-7e-derived effects in differentiation markers, and reversed the increase in GSK3β(P) and β-catenin, thus indicating that miRNA let-7e is involved in differentiation via the modulation of GSK3β phosphorylation and β-catenin production.

PMID:
23593353
[PubMed - indexed for MEDLINE]
PMCID:
PMC3622609
Free PMC Article

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