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Effects of hunger on neuronal histone modifications slow aging in Drosophila

2023; American Association for the Advancement of Science; Volume: 380; Issue: 6645 Linguagem: Inglês

10.1126/science.ade1662

1095-9203

Kristina J Weaver, Robert A. Holt, E Henry, Yang Lyu, Scott D. Pletcher,

Circadian rhythm and melatonin

Hunger is an ancient drive, yet the molecular nature of pressures of this sort and how they modulate physiology are unknown. We find that hunger modulates aging in Drosophila. Limitation of branched-chain amino acids (BCAAs) or activation of hunger-promoting neurons induced a hunger state that extended life span despite increased feeding. Alteration of the neuronal histone acetylome was associated with BCAA limitation, and preventing these alterations abrogated the effect of BCAA limitation to increase feeding and extend life span. Hunger acutely increased feeding through usage of the histone variant H3.3, whereas prolonged hunger seemed to decrease a hunger set point, resulting in beneficial consequences for aging. Demonstration of the sufficiency of hunger to extend life span reveals that motivational states alone can be deterministic drivers of aging.