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Senescence impairs successful reprogramming to pluripotent stem cells

Research output: Contribution to journalArticle

Ana Banito, Sheikh T Rashid, Juan Carlos Acosta, SiDe Li, Carlos F Pereira, Imbisaat Geti, Sandra Pinho, Jose C Silva, Veronique Azuara, Martin Walsh, Ludovic Vallier, Jesús Gil

Original languageEnglish
Pages (from-to)2134-9
Number of pages6
JournalGenes & development
Volume23
Issue number18
Early online date20 Aug 2009
DOIs
E-pub ahead of print20 Aug 2009
Published15 Sep 2009

King's Authors

Abstract

Somatic cells can be reprogrammed into induced pluripotent stem (iPS) cells by overexpressing combinations of factors such as Oct4, Sox2, Klf4, and c-Myc. Reprogramming is slow and stochastic, suggesting the existence of barriers limiting its efficiency. Here we identify senescence as one such barrier. Expression of the four reprogramming factors triggers senescence by up-regulating p53, p16(INK4a), and p21(CIP1). Induction of DNA damage response and chromatin remodeling of the INK4a/ARF locus are two of the mechanisms behind senescence induction. Crucially, ablation of different senescence effectors improves the efficiency of reprogramming, suggesting novel strategies for maximizing the generation of iPS cells.

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