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[Preprint]. 2025 Jul 26:2025.07.22.666178. [Version 1] doi: 10.1101/2025.07.22.666178

A brain-specific microRNA, miR-1000, regulates lipid homeostasis via Neuropeptide-like precursor 1 in Drosophila melanogaster

Pushpa Verma, Pruthvi Gowda, Nika N Danial, David Van Vactor
PMCID: PMC12330639  PMID: 40777481

Abstract

Metabolism requires precise gene regulation to balance energy intake and expenditure for an organism’s well-being, with misregulation often leading to metabolic syndromes. This study reveals that the brain-specific microRNA miR-1000 regulates fat storage by controlling the expression of a neuropeptide gene, Nplp1 . Loss of miR-1000 increases Nplp1 expression, leading to higher body weight, increased fat storage, improved survival under food deprivation conditions, and a reduced overall lifespan in Drosophila . We further show that miR-1000 promotes fat storage upon feeding by regulating TAG synthesis and storage in lipid droplets, thereby playing a crucial role in metabolic regulation.

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