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A Master Conductor: How the SIFamide Neuropeptide System Orchestrates Behavioral State in Drosophila
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DOI：10.1002/bies.70137.png)
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Abstract
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How does the brain prioritize competing drives like hunger, sleep, and mating? In Drosophila, the neuropeptide SIFamide (SIFa) has emerged as a central coordinator of these behavioral states. This commentary synthesizes recent findings, highlighting the study by Velazquez et al., which reveals that SIFa receptor signaling regulates sleep and feeding in a time-of-day-specific manner to maintain energy homeostasis. We further discuss how SIFa modulates reproductive behavior through synaptic plasticity in male-specific GABAergic neurons. Anatomically, SIFa neurons act as an integration hub, receiving convergent circadian and metabolic inputs to bias downstream circuits. We propose that the SIFa system serves as a master conductor, orchestrating adaptive behavioral decisions based on internal physiological needs.
Keywords:
SIFamide
behavioral state
energy homeostasis
circadian rhythm
synaptic plasticity
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