Ontology type: schema:ScholarlyArticle Open Access: True
2018-02-23
AUTHORSSejong Huh, Hwa-Ryung Song, Geuk-Rae Jeong, Hyejin Jang, Nan-Hee Seo, Ju-Hyun Lee, Ji-Yeun Yi, Byongsun Lee, Hyun Woo Choi, Jeong Tae Do, Jin-Su Kim, Soo-Hong Lee, Jae-Won Jung, Taekyu Lee, Jaekyung Shim, Myung-Kwan Han, Tae-Hee Lee
ABSTRACTThe molecular mechanism underlying the initiation of somatic cell reprogramming into induced pluripotent stem cells (iPSCs) has not been well described. Thus, we generated single-cell-derived clones by using a combination of drug-inducible vectors encoding transcription factors (Oct4, Sox2, Klf4 and Myc) and a single-cell expansion strategy. This system achieved a high reprogramming efficiency after metabolic and epigenetic remodeling. Functional analyses of the cloned cells revealed that extracellular signal-regulated kinase (ERK) signaling was downregulated at an early stage of reprogramming and that its inhibition was a driving force for iPSC formation. Among the reprogramming factors, Myc predominantly induced ERK suppression. ERK inhibition upregulated the conversion of somatic cells into iPSCs through concomitant suppression of serum response factor (SRF). Conversely, SRF activation suppressed the reprogramming induced by ERK inhibition and negatively regulated embryonic pluripotency by inducing differentiation via upregulation of immediate early genes, such as c-Jun, c-Fos and EGR1. These data reveal that suppression of the ERK-SRF axis is an initial molecular event that facilitates iPSC formation and may be a useful surrogate marker for cellular reprogramming. More... »
PAGESe448-e448
http://scigraph.springernature.com/pub.10.1038/emm.2017.279
DOIhttp://dx.doi.org/10.1038/emm.2017.279
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/29472703
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