FOXO transcription factor is shown to regulate cellular signaling involved in DNA repair, cell cycle, oxidative stress, and apoptosis. Acetylation of FOXO is associated with inflammatory cell activation and cellular apoptosis. Under resting conditions, inflammation-related genes are controlled by SIRT1 deacetylase. However, when NF-κB and FOXO are acetylated by CBP/p300, transcription of proinflammatory and apoptotic genes are initiated.