Small molecules facilitate rapid and synchronous iPSC generation

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Small molecules facilitate rapid and synchronous iPSC generation

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Title: Small molecules facilitate rapid and synchronous iPSC generation
Author: Bar-Nur, Ori; Brumbaugh, Justin; Verheul, Cassandra; Apostolou, Effie; Pruteanu-Malinici, Iulian; Walsh, Ryan M.; Ramaswamy, Sridhar; Hochedlinger, Konrad

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Citation: Bar-Nur, Ori, Justin Brumbaugh, Cassandra Verheul, Effie Apostolou, Iulian Pruteanu-Malinici, Ryan M. Walsh, Sridhar Ramaswamy, and Konrad Hochedlinger. 2014. “Small molecules facilitate rapid and synchronous iPSC generation.” Nature methods 11 (11): 1170-1176. doi:10.1038/nmeth.3142.
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Abstract: The reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) upon overexpression of OCT4, KLF4, SOX2, and c-MYC (OKSM) provides a powerful system to interrogate basic mechanisms of cell fate change. However, iPSC formation with standard methods is protracted and inefficient, resulting in heterogeneous cell populations. Here we show that exposure of OKSM-expressing cells to both ascorbic acid and a GSK3-beta inhibitor (termed “AGi”) facilitates more synchronous and rapid iPSC formation from a variety of mouse cell types. AGi treatment restored the ability of refractory cell populations to yield iPSC colonies, and it attenuated the activation of developmental regulators commonly observed during the reprogramming process. Moreover, AGi supplementation gave rise to chimera-competent iPSCs after as little as 48 hours of OKSM expression. Our results offer a simple modification to the reprogramming protocol, facilitating iPSC induction at unparalleled efficiencies and enabling dissection of the underlying mechanisms in more homogeneous cell populations.
Published Version: doi:10.1038/nmeth.3142
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