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Dev Biol. 2014 Jul 1;391(1):81-8. doi: 10.1016/j.ydbio.2014.03.020. Epub 2014 Apr 4.

miR-373 is regulated by TGFβ signaling and promotes mesendoderm differentiation in human Embryonic Stem Cells.

Author information

1
Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA; Department of Biology and Biotechnology 'Charles Darwin', Sapienza University of Rome, Rome 00185, Italy.
2
Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA.
3
Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA. Electronic address: brvnlou@rockefeller.edu.

Abstract

MicroRNAs (miRNAs) belonging to the evolutionary conserved miR-302 family play important functions in Embryonic Stem Cells (ESCs). The expression of some members, such as the human miR-302 and mouse miR-290 clusters, is regulated by ESC core transcription factors. However, whether miRNAs act downstream of signaling pathways involved in human ESC pluripotency remains unknown. The maintenance of pluripotency in hESCs is under the control of the TGFβ pathway. Here, we show that inhibition of the Activin/Nodal branch of this pathway affects the expression of a subset of miRNAs in hESCs. Among them, we found miR-373, a member of the miR-302 family. Proper levels of miR-373 are crucial for the maintenance of hESC pluripotency, since its overexpression leads to differentiation towards the mesendodermal lineage. Among miR-373 predicted targets, involved in TGFβ signaling, we validated the Nodal inhibitor Lefty. Our work suggests a crucial role for the interplay between miRNAs and signaling pathways in ESCs.

KEYWORDS:

Human Embryonic Stem Cells; Mesendoderm; TGFβ signaling; microRNAs

PMID:
24709321
PMCID:
PMC4081558
DOI:
10.1016/j.ydbio.2014.03.020
[Indexed for MEDLINE]
Free PMC Article

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