Send to

Choose Destination
Nat Cell Biol. 2008 Jul;10(7):825-36. doi: 10.1038/ncb1744. Epub 2008 May 30.

Opposing roles for p16Ink4a and p19Arf in senescence and ageing caused by BubR1 insufficiency.

Author information

Department of Pediatric and Adolescent Medicine, Mayo Clinic College of Medicine, Rochester, MN 55905, USA.

Erratum in

  • Nat Cell Biol. 2012 Jun;14(6):649. Pitel, Kevin [corrected to Pitel, Kevin S].


Expression of p16(Ink4a) and p19(Arf) increases with age in both rodent and human tissues. However, whether these tumour suppressors are effectors of ageing remains unclear, mainly because knockout mice lacking p16(Ink4a) or p19(Arf) die early of tumours. Here, we show that skeletal muscle and fat, two tissues that develop early ageing-associated phenotypes in response to BubR1 insufficiency, have high levels of p16(Ink4a) and p19(Arf). Inactivation of p16(Ink4a) in BubR1-insufficient mice attenuates both cellular senescence and premature ageing in these tissues. Conversely, p19(Arf) inactivation exacerbates senescence and ageing in BubR1 mutant mice. Thus, we identify BubR1 insufficiency as a trigger for activation of the Cdkn2a locus in certain mouse tissues, and demonstrate that p16(Ink4a) is an effector and p19(Arf) an attenuator of senescence and ageing in these tissues.

[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Nature Publishing Group Icon for PubMed Central
Loading ...
Support Center