Aging may increase apoptotic events and the susceptibility of the central nervous system to apoptosis. Calorie restriction has been shown to have neuroprotective effects, but the mechanisms in vivo are unknown. We investigated apoptosis and apoptotic regulatory proteins in the brain frontal cortex of 12-month-old ad libitum fed, 26-month-old ad libitum fed, and 26-month-old calorie-restricted (CR) male Fischer 344 rats (CR = 40% restricted compared to ad libitum).
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