A20 Is Dynamically Regulated in the Heart and Inhibits the Hypertrophic Response

Abstract
Background— Nuclear factor (NF)–κB signaling has been implicated in cardiomyocyte hypertrophy. Here, we determine the cardiac regulation and biological activity of A20, an inhibitor of NF-κB signaling. Methods and Results— Mice were subjected to aortic banding, and A20 expression was examined. A20 mRNA upregulation (4.3±1.5-fold; P P Conclusions— A20 is dynamically regulated during acute biomechanical stress in the heart and functions to attenuate cardiac hypertrophy through the inhibition of NF-κB signaling without sensitizing cardiomyocytes to apoptotic cell death.