2i-iPS cell colony. Inhibitors of the Mek/Erk and GSK3 pathways (2i) in the absence of serum promote the generation of induced pluripotent stem (iPS) cell colonies, shown here. These cells show expression of a pluripotency reporter (green) and reactivation of the silent X chromosome, as demonstrated by the lack of the nuclear red staining body (trimethyl H3K27). For comparison, a cluster of non-reprogrammed cells (non-green) displaying a silent X chromosome (red nuclear body) is shown in the bottom right-hand corner (see Silva et al., e253).
Image Credit: Illustration by Jose Silva and Ornella Barrandon
Editorial
PLoS Biology at 5: The Future Is Open Access
PLOS Biology: published October 28, 2008 | https://doi.org/10.1371/journal.pbio.0060267
Synopses
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