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© Research
Publication : Stem cell reports

Argonaute 2 Is Required for Extra-embryonic Endoderm Differentiation of Mouse Embryonic Stem Cells

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Stem cell reports - 24 Jan 2018

Ngondo RP, Cirera-Salinas D, Yu J, Wischnewski H, Bodak M, Vandormael-Pournin S, Geiselmann A, Wettstein R, Luitz J, Cohen-Tannoudji M, Ciaudo C

Link to Pubmed [PMID] – 29396181

Stem Cell Reports 2018 Jan;

In mouse, although four Argonaute (AGO) proteins with partly overlapping functions in small-RNA pathways exist, only Ago2 deficiency causes embryonic lethality. To investigate the role of AGO2 during mouse early development, we generated Ago2-deficient mouse embryonic stem cells (mESCs) and performed a detailed characterization of their differentiation potential. Ago2 disruption caused a global reduction of microRNAs, which resulted in the misregulation of only a limited number of transcripts. We demonstrated, both in vivo and in vitro, that AGO2 is dispensable for the embryonic germ-layer formation. However, Ago2-deficient mESCs showed a specific defect during conversion into extra-embryonic endoderm cells. We proved that this defect is cell autonomous and can be rescued by both a catalytically active and an inactive Ago2, but not by Ago2 deprived of its RNA binding capacity or by Ago1 overexpression. Overall, our results suggest a role for AGO2 in stem cell differentiation.

https://www.ncbi.nlm.nih.gov/pubmed/29396181