How microRNAs facilitate reprogramming to pluripotency

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Abstract
The ability to generate pluripotent stem cells from a variety of cell and tissue sources through the ectopic expression of a specific set of transcription factors has revolutionized regenerative biology. The development of this reprogramming technology not only makes it possible to perform basic research on human stem cells that do not have to be derived from embryos, but also allows patient-specific cells and tissues to be generated for therapeutic use. Optimizing this process will probably lead to a better and more efficient means of generating pluripotent stem cells. Here, we discuss recent findings that show that, in addition to transcription factors, microRNAs can promote pluripotent reprogramming and can even substitute for these pluripotency transcription factors in some cases. Taking into consideration that microRNAs have the potential to be used as small-molecule therapeutics, such findings open new possibilities for both pluripotent stem cell reprogramming and the reprogramming of cells into other cell lineages.

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