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Accession IconGSE61157

MicroRNAs control the apoptotic threshold in primed pluripotent stem cells through regulation of BIM

Organism Icon Mus musculus
Sample Icon 6 Downloadable Samples
Technology Badge Icon Affymetrix Mouse Gene 1.0 ST Array (mogene10st)

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Mammalian primed pluripotent stem cells have been shown to be highly susceptible to cell death stimuli due to their low apoptotic threshold, but how this threshold is regulated remains largely unknown. Here we identify miRNA-mediated regulation as a key mechanism controlling apoptosis in the post-implantation epiblast. Moreover, we find that three miRNA families, miR-20, miR-92 and miR-302, control the mitochondrial apoptotic machinery by fine-tuning the levels of expression of the pro-apoptotic protein BIM. These families therefore represent an essential buffer needed to maintain cell survival in stem cells that are not only primed for differentiation but also for cell death.
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