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Letter

Nature Genetics 39, 99–105 (1 January 2007) | doi:10.1038/ng1937

Cdkn1a deletion improves stem cell function and lifespan of mice with dysfunctional telomeres without accelerating cancer formation

Aaheli Roy Choudhury , Zhenyu Ju , Meta W Djojosubroto , Andrea Schienke , Andre Lechel , Sonja Schaetzlein , Hong Jiang , Anna Stepczynska , Chunfang Wang , Jan Buer , Han-Woong Lee , Thomas von Zglinicki , Arnold Ganser , Peter Schirmacher , Hiromitsu Nakauchi & K Lenhard Rudolph

Telomere shortening limits the proliferative lifespan of human cells by activation of DNA damage pathways, including upregulation of the cell cycle inhibitor p21 (encoded by Cdkn1a, also known as Cip1 and Waf1)) (refs. 1–5).