alexa Promotion of direct reprogramming by transformation-deficient Myc.
Molecular Biology

Molecular Biology

Cell & Developmental Biology

Author(s): Nakagawa M, Takizawa N, Narita M, Ichisaka T, Yamanaka S

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Abstract Induced pluripotent stem cells (iPSCs) are generated from mouse and human fibroblasts by the introduction of three transcription factors: Oct3/4, Sox2, and Klf4. The proto-oncogene product c-Myc markedly promotes iPSC generation, but also increases tumor formation in iPSC-derived chimeric mice. We report that the promotion of iPSC generation by Myc is independent of its transformation property. We found that another Myc family member, L-Myc, as well as c-Myc mutants (W136E and dN2), all of which have little transformation activity, promoted human iPSC generation more efficiently and specifically compared with WT c-Myc. In mice, L-Myc promoted germline transmission, but not tumor formation, in the iPSC-derived chimeric mice. These data demonstrate that different functional moieties of the Myc proto-oncogene products are involved in the transformation and promotion of directed reprogramming.
This article was published in Proc Natl Acad Sci U S A and referenced in Cell & Developmental Biology

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