DSIP
Delta sleep-inducing peptide, a nonapeptide studied for slow-wave sleep and stress modulation since the 1970s.
In plain English
DSIP (delta sleep-inducing peptide) is a nine-amino-acid peptide first isolated in the 1970s from the blood of sleeping rabbits, where it was associated with delta-wave (deep) sleep. Subsequent research expanded its proposed effects to include stress modulation, analgesia, and pituitary regulation. Despite decades of study, the literature is fragmented and DSIP has not advanced to FDA approval. People commonly research DSIP for sleep architecture and stress recovery; rigorous modern human evidence is sparse.
What it is
DSIP is a synthetic nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) corresponding to a sequence isolated from rabbit cerebral venous blood during slow-wave sleep.
Mechanism (summary)
Proposed mechanisms include modulation of opioid systems, influence on corticotropin-releasing hormone signaling, and broader neuromodulatory effects. A clear receptor for DSIP has not been definitively established.
Why people research it
- Sleep architecture and delta-wave sleep
- Stress and analgesia
- Withdrawal-related symptoms
- Pituitary regulation
Human evidence
A handful of small clinical studies, mostly from the 1980s, suggested benefits in chronic insomnia and stress-related symptoms. Modern, larger RCTs are essentially absent.
Animal / lab evidence
Rodent studies describe effects on sleep architecture, analgesia, and stress responses.
Key studies
Each summary explains the design, what was found, and what it doesn't prove.
A historical review that flagged how mixed and confusing the data on DSIP have been since the 1970s.
A small 1980s trial found DSIP modestly improved sleep in people with chronic insomnia.
History
Isolated by Schoenenberger and Monnier in Switzerland in 1977 from the cerebral venous blood of sleeping rabbits.
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