The Epithelial-Mesenchymal Transition Factor SNAIL Paradoxically Enhances Reprogramming

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The Epithelial-Mesenchymal Transition Factor SNAIL Paradoxically Enhances Reprogramming

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Title: The Epithelial-Mesenchymal Transition Factor SNAIL Paradoxically Enhances Reprogramming
Author: Unternaehrer, Juli J.; Zhao, Rui; Kim, Kitai; Cesana, Marcella; Powers, John T.; Ratanasirintrawoot, Sutheera; Onder, Tamer; Shibue, Tsukasa; Weinberg, Robert A.; Daley, George Q.

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Citation: Unternaehrer, Juli J., Rui Zhao, Kitai Kim, Marcella Cesana, John T. Powers, Sutheera Ratanasirintrawoot, Tamer Onder, Tsukasa Shibue, Robert A. Weinberg, and George Q. Daley. 2014. “The Epithelial-Mesenchymal Transition Factor SNAIL Paradoxically Enhances Reprogramming.” Stem Cell Reports 3 (5): 691-698. doi:10.1016/j.stemcr.2014.09.008. http://dx.doi.org/10.1016/j.stemcr.2014.09.008.
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Abstract: Summary Reprogramming of fibroblasts to induced pluripotent stem cells (iPSCs) entails a mesenchymal to epithelial transition (MET). While attempting to dissect the mechanism of MET during reprogramming, we observed that knockdown (KD) of the epithelial-to-mesenchymal transition (EMT) factor SNAI1 (SNAIL) paradoxically reduced, while overexpression enhanced, reprogramming efficiency in human cells and in mouse cells, depending on strain. We observed nuclear localization of SNAI1 at an early stage of fibroblast reprogramming and using mouse fibroblasts expressing a knockin SNAI1-YFP reporter found cells expressing SNAI1 reprogrammed at higher efficiency. We further demonstrated that SNAI1 binds the let-7 promoter, which may play a role in reduced expression of let-7 microRNAs, enforced expression of which, early in the reprogramming process, compromises efficiency. Our data reveal an unexpected role for the EMT factor SNAI1 in reprogramming somatic cells to pluripotency.
Published Version: doi:10.1016/j.stemcr.2014.09.008
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4235745/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:13454785
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