Cellular senescence requires CDK5 repression of Rac1 activity.


Cellular senescence is a tumor-suppressive process characterized by an irreversible cell cycle exit, a unique morphology, and expression of senescence-associated beta-galactosidase (SA-beta-Gal). We report here a role for CDK5 in induction of senescent cytoskeletal changes. CDK5 activation is upregulated in senescing cells. The increased activity of CDK5… (More)


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