CEDAR

Scientific Reference

DSIP (Delta Sleep-Inducing Peptide)

Evidence profile: Controlled human evidence

DSIP (Delta Sleep-Inducing Peptide) is a naturally occurring nonapeptide originally isolated from the brain in 1974, composed of nine amino acids. It was initially identified for its role in promoting delta-wave (deep) sleep, but subsequent research has revealed broader neuromodulatory effects, including stress regulation, endocrine modulation, and potential analgesic properties. Despite decades of investigation, its precise mechanisms remain incompletely understood. However, DSIP is widely studied for its ability to enhance sleep architecture without traditional sedative effects, making it of interest in sleep optimization, recovery, and neuroendocrine regulation.

Mechanism of Action

DSIP modulates multiple neurotransmitter systems, including enhancement of GABAergic signaling, interaction with NMDA receptors, and modulation of endogenous opioid pathways. It also influences the hypothalamic-pituitary-adrenal (HPA) axis, contributing to regulation of cortisol and other stress-related hormones. These combined effects support sleep regulation, stress reduction, and neuroendocrine balance.

Molecular Information

  • Type: Nonapeptide (neuroregulatory peptide)
  • Length: 9 amino acids
  • Molecular weight: 848.8 g/mol
  • Molecular formula: C35H48N10O15
  • CAS: 62568-57-4

Published Research

  • Acute and delayed effects of DSIP (delta sleep-inducing peptide) on human sleep behavior

    Schneider-Helmert D et al. · International journal of clinical pharmacology, therapy, and toxicology · 1981 · Clinical

    PMID 6895513 — View on PubMed

  • The influence of synthetic DSIP (delta-sleep-inducing-peptide) on disturbed human sleep

    Schneider-Helmert D et al. · Experientia · 1981 · Clinical

    PMID 7028502 — View on PubMed