Delta Sleep-Inducing PeptideAlso known as: DSIP

Mechanism of Action

DSIP modulates signaling in the central nervous system by influencing neuroendocrine pathways. It is linked to increased slow-wave sleep (SWS), enhanced melatonin secretion, reduction of oxidative stress, and modulation of REM and deep sleep cycles. DSIP impacts the hypothalamic regulation of hormonal secretion, particularly affecting cortisol and growth hormone release, and potentially supports neuroprotective mechanisms.

Reported Research Benefits

Research on sleep regulation and disorders, stress resilience, neuro-endocrine homeostasis, hormonal balance including cortisol and growth hormone modulation, antioxidant effects, and mood-related conditions such as depression and anxiety. Studies also investigate DSIP in jetlag models, circadian rhythm disturbances, and sleep cycle restoration.

Dosing Protocol & Reconstitution

DSIP is supplied as a lyophilized powder intended for reconstitution in bacteriostatic water. In preclinical research, it is commonly administered via subcutaneous injection using insulin syringes to ensure controlled dosing and biological effect monitoring. No standard human dosing exists as it is strictly for laboratory use.

Research Notes

Preclinical studies suggest DSIP may increase the duration and quality of deep (slow-wave) sleep and improve circadian rhythm stability. It shows promise in modulating stress hormone levels and exhibiting antioxidative properties. Half-life in vivo is short, necessitating controlled delivery in experimental settings. Clinical efficacy and safety remain under investigation.

Research Summary

Delta Sleep-Inducing Peptide (DSIP) is a nonapeptide originally isolated from cerebral venous blood that promotes slow-wave (delta) sleep. It also modulates stress responses by normalizing cortisol and LH secretion, and has shown analgesic and anti-oxidative properties in animal studies.

Side Effects & Safety

Generally well-tolerated. Mild drowsiness, transient headache, and dizziness reported. May interact with opioid receptor systems.

Stability & Storage

Refer to research notes

Molecular Data

Sequence: Trp-Ala-Gly-Gly-Asp-Ala-Gly-Glu
Molecular Formula: C92H148N30O18
Molecular Weight: 1306.6 g/mol
CAS Number: 69581-88-6
IUPAC Name: L-tryptophyl-L-alanyl-glycylglycyl-L-aspartyl-L-alanyl-glycyl-L-glutamic acid

Primary literature: https://pubmed.ncbi.nlm.nih.gov/?term=DSIP+delta+sleep+inducing+peptide