At 50 μg/ml, resveratrol produced sharply divergent outcomes depending on timing: embryonic exposure accelerated pupation but shortened adult lifespan by activating the juvenile hormone–insulin/IGF signaling axis and impairing antioxidant defenses. Adult supplementation, however, extended lifespan exclusively in females, suppressing mTOR, upregulating autophagy and stress-response pathways, boosting glycolysis and pentose phosphate flux, accumulating citrate, and remodeling one-carbon metabolism. These metabolic shifts co-occurred with elevated H3K9 acetylation, upregulation of the histone acetyltransferase cofactor nejire, and downregulation of the methyltransferase Ash1 — pointing to chromatin remodeling as the mechanistic bridge between metabolic state and longevity. Critically, maternal adult exposure transmitted lifespan extension and persistent chromatin/metabolic changes to female offspring across two generations.
This is one of the more mechanistically complete resveratrol studies in recent years, linking a single polyphenol dose to a coherent metabolic-epigenetic cascade rather than invoking a single target like SIRT1. The multigenerational transmission finding is genuinely striking — if analogous mechanisms operate in mammals, dietary compounds could influence offspring healthspan without genetic mutation, a concept with profound public-health implications. However, Drosophila share only partial metabolic homology with humans, effect sizes weren't reported numerically in the abstract, and the sex specificity demands explanation before human extrapolation. The embryonic harm finding is a meaningful caution rarely foregrounded in resveratrol enthusiasm. Overall, paradigm-adjacent for epigenetic inheritance research, but human validation is essential before clinical relevance can be claimed.
