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Also known as: DSIP, Delta Sleep-Inducing Peptide
Delta Sleep-Inducing Peptide is a small neuromodulatory nonapeptide studied for its effects on sleep architecture, stress hormones, and pain modulation.
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DSIP is a nine-amino-acid peptide that crosses the blood-brain barrier and is thought to act as a neuromodulator influencing delta-wave (slow-wave) sleep. It appears to modulate the hypothalamic-pituitary-adrenal axis, lowering circulating corticotropin and cortisol while affecting somatostatin and other neuroendocrine outputs. Research also implicates interactions with opioidergic and GABAergic signaling, contributing to its reported antinociceptive and stress-buffering effects, though its precise receptor target remains undefined.