DSIP Research Guide: Delta Sleep-Inducing Peptide Mechanism
DSIP is a nine-amino-acid neuropeptide first isolated from rabbit brain in association with electroencephalographic delta-wave activity.
What is DSIP?
DSIP is one of the oldest characterized sleep-related neuropeptides, first isolated in the 1970s in association with delta-band EEG activity in sleep research.
Mechanism of action
Despite decades of study, no specific DSIP receptor has been definitively cloned. Reported effects include enhancement of slow-wave (stage 3/4 NREM) sleep, reduction of HPA-axis tone, and modulation of central opioid signaling.
Sourcing & purity
Research-grade material should be ≥99% pure by HPLC with peptide content confirmed via mass spectrometry. Redline Bio material ships with batch documentation; independent third-party COAs are published on the lab reports page as testing returns.
Compliance reminder
Sold and distributed for laboratory research use only. Not approved by the FDA for human consumption, diagnosis, treatment, or cure of any disease. Researchers are responsible for compliance with all applicable institutional, state, and federal regulations.
Frequently asked questions
What is DSIP?
Delta Sleep-Inducing Peptide is a nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) first isolated by Schoenenberger and Monnier in 1977 from the cerebral venous blood of sleep-induced rabbits.
Mechanism?
The precise receptor remains uncharacterized. Published research documents modulation of slow-wave sleep architecture, downregulation of stress-axis activity (ACTH/cortisol suppression), and interaction with opioid signaling in animal models.
Half-life?
Very short — on the order of 7–15 minutes in circulation. Downstream effects on sleep architecture persist far longer than plasma exposure.