DSIP

Delta Sleep-Inducing Peptide

Half-life: ~minutes in plasma; CNS activity persists longer

Delta Sleep PeptideDSIP nonapeptide

Research Profile

Research Depth

Potency

Half-Life Score

Selectivity

Stability

Relative research assessments — educational reference only.

Target Receptors

Opioid receptors (partial)HPA axis (modulatory)Thalamic sleep circuits

Critical Research Warning

For educational reference only. Human sleep studies show mixed results — some individuals are non-responders. Short plasma half-life limits oral utility.

PeptidePlaza Entry #016

"A neuropeptide originally isolated from rabbit cerebrospinal fluid during slow-wave sleep. Studied for sleep regulation, stress buffering, pain modulation, and antioxidant effects across decades of European research."

Full Description

DSIP (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) is a nonapeptide first isolated in 1974 from the cerebral venous blood of rabbits induced into slow-wave sleep by electrical stimulation of the thalamus. It crosses the blood-brain barrier. Research attributes to it multiple physiological roles: induction of delta-wave (slow-wave) sleep, reduction of ACTH and cortisol under stress, modulation of opioid pathways for pain, antioxidant activity, and normalization of blood pressure. Uniquely, it exhibits amphoteric stress-buffering — reducing stress-induced cortisol without suppressing baseline HPA axis function.

Mechanism of Action

Modulates sleep-wake cycle via thalamic and limbic pathways. Buffers HPA axis stress response without suppressing baseline cortisol. Interacts with opioid receptors for analgesia. Antioxidant activity via reduction of lipid peroxidation.

Reported Benefits

• Promotes natural delta-wave (slow-wave) deep sleep
• Stress-buffering via HPA axis amplitude modulation
• Analgesic effects through opioid pathway modulation

Potential Side Effects

• Daytime drowsiness (dose-dependent)
• Mild headache upon waking
• Inconsistent response rates in human studies

Frequently Asked Questions

How does DSIP affect sleep quality?▼

Unlike sedatives that force unconsciousness, DSIP promotes natural delta-wave (deep slow-wave) sleep — the most restorative sleep stage. Research shows it increases time spent in deep sleep while preserving normal sleep architecture.

Does DSIP have effects beyond sleep?▼

Yes. DSIP has been shown to buffer stress-induced cortisol spikes (without suppressing baseline cortisol), modulate pain perception via opioid pathways, and reduce oxidative stress — making it a multi-functional neuropeptide beyond sleep research.

For Research Reference Only

Not medical advice. Peptides may be regulated or restricted in your jurisdiction.

References

1.Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke. PubMed (2021). Tukhovskaya EA, et al.. pubmed.ncbi.nlm.nih.gov/34500605/ ↑
2.Phosphorylated delta sleep inducing peptide restores spatial memory and p-CREB expression by improving sleep architecture at high altitude. PubMed (2018). Roy K, et al.. pubmed.ncbi.nlm.nih.gov/30107169/ ↑
3.Expression and Purification of Delta Sleep-Inducing Peptide Fused with Protein Transduction Domain and Human Serum Albumin in Pichia pastoris. PubMed (2017). Zhang XG, et al.. pubmed.ncbi.nlm.nih.gov/28462721/ ↑
4.Effect of Delta Sleep-Inducing Peptide on Functional State of Hepatocytes in Rats During Restraint Stress. PubMed (2016). Bobyntsev II, et al.. pubmed.ncbi.nlm.nih.gov/26902351/ ↑

Where to Source DSIP

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