Changes in brain energy and phospholipid metabolism during development and aging in the Fischer 344 rat.

The effects of brain development and aging on high-energy phosphate and membrane phospholipid metabolism were studied from birth to senescence in the Fischer 344 rat using 31P nuclear magnetic resonance spectroscopy. Marked developmental and smaller aging-related changes were observed in brain high-energy phosphates, phospholipid precursors and phospholipid breakdown products. The biochemical changes correlate with known histological and electrophysiological changes occurring in the brain during development (neuritic sprouting and onset of brain electrical activity) and aging (loss of dendritic processes). These findings provide a framework for interpreting the effects of physiological insults during different developmental and aging periods.