“
TL;DR
This study used Drosophila gustatory neurons to show that the metabolic enzyme OGT, together with PRC2.1 and ERK signaling, integrates dietary and activity information at the chromatin level to drive sensory adaptations to a high-sugar diet.
eLife · 7 authors, 10 centres
This summary was generated by AI from a single paper. It has not been reviewed by a clinician and is not clinical advice. Verify against the source before acting on it.
This study used Drosophila gustatory neurons to show that the metabolic enzyme OGT, together with PRC2.1 and ERK signaling, integrates dietary and activity information at the chromatin level to drive sensory adaptations to a high-sugar diet.
This preclinical study in Drosophila melanogaster investigated the molecular mechanisms of diet-induced sensory plasticity. Using genetic, biochemical, and physiological approaches in fly gustatory neurons, the authors demonstrated that the metabolic enzyme O-GlcNAc Transferase (OGT) associates with chromatin and works synergistically with the epigenetic silencer PRC2.1 and the MAPK/ERK pathway effector Stripe (Sr/EGR2) to integrate nutrient and activity information. This integration leads to diet-dependent changes in chromatin accessibility and gene transcription, which in turn alter the taste neurons' responses to sugar and the flies' behavioral sensitivity to sweetness. The central finding is that OGT activity is necessary for these transcriptional, chromatin, and behavioral adaptations to a high-sugar diet. Limitations include the use of a small number of cells (60 gustatory neurons), the inability to definitively prove physical interactions between proteins in vivo, and the reliance on inhibitors that may have non-cell autonomous effects.