99% Purity Delta Sleep-Inducing Peptide Dsip 5mg/15mg for Sleep & Anxiety Relief

1.  Description

     Chemical Properties: DSIP is a linear nonapeptide with the amino acid sequence Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu, lacking any modifying groups. Its core targets include receptors in the hypothalamic sleep regulation center, stress-related neurotransmitter receptors (such as serotonin receptors), and neuroprotective signaling pathways. Chemically stable, it resists hydrolysis in neutral to weakly acidic environments (pH 5.5-7.5). Exhibits superior resistance to peptidase degradation compared to short-chain peptides. Compatible with sleep-regulating components like melatonin and GABA. Molecular weight: 848.9 Da.

     Physical Properties: DSIP appears as a white to off-white crystalline powder at room temperature, odorless and tasteless. It exhibits excellent water solubility (solubility ≥50 mg/mL), dissolving rapidly in aqueous systems such as pure water, physiological saline, and phosphate-buffered saline (PBS). It is slightly soluble in ethanol and propylene glycol but insoluble in nonpolar solvents like ether and petroleum ether. Store at -20°C in a dry, sealed container protected from light; avoid repeated freeze-thaw cycles. Research-grade/application-grade products have ≥98% purity (HPLC-assayed), ≤1.0% impurities, and are free of endotoxins and heavy metal residues.

     Source and Preparation: DSIP is naturally present in the human hypothalamus, pituitary gland, plasma, and cerebrospinal fluid as an endogenous sleep-regulating peptide. Industrially synthesized via solid-phase peptide synthesis using high-purity L-amino acids as raw materials. The process involves condensation, deprotection, peptide chain assembly, and final purification by high-performance liquid chromatography (HPLC) to yield a high-purity product. Reaction conditions are strictly controlled throughout synthesis to ensure structural integrity and biological activity. Product quality is validated by mass spectrometry (MS) and amino acid sequence analysis.

2.  Application

     Biomedical Research Field: DSIP serves as a core tool reagent in sleep mechanism and neuromodulation research, investigating the mechanisms underlying sleep disorders (insomnia, circadian rhythm disorders), stress-induced neural injury, and neurodegenerative diseases (such as Alzheimer's disease). Through neuronal cell cultures, sleep-deprived animal models, and stress-modeled mice, it analyzes its regulatory effects on sleep cycles, neurotransmitter release, and neuronal survival, providing experimental evidence for sleep medicine and neuroprotective drug development.

     Sleep Health and Functional Wellness Field: As a natural sleep-regulating ingredient, DSIP is used to develop dietary supplements, sublingual drops, and oral formulations targeting individuals with insomnia (difficulty falling asleep, sleep maintenance disorders), circadian rhythm disorders (shift work, jet lag), and stress-induced sleep deterioration (high-pressure work environments, anxiety-related insomnia). Its mild, non-addictive properties comply with EU and US dietary supplement standards, making it suitable for long-term sleep health maintenance.

     Preclinical Pharmaceutical Development: DSIP serves as a drug candidate for neuroprotection and stress-related disorders, exploring indications including post-traumatic stress disorder (PTSD), ischemic brain injury, and cognitive decline from chronic stress. Concurrently, research is underway for its use as an adjunctive therapy in sleep apnea syndrome and idiopathic insomnia. Currently, studies are in the animal testing and small-scale clinical observation phases.

3. Main Efficacy

     Core Sleep Regulation Mechanism: DSIP primarily acts on the hypothalamic sleep-wake center, regulating melatonin secretion rhythms, inhibiting the release of arousal-related neurotransmitters (such as norepinephrine), prolonging slow-wave sleep (deep sleep) duration, improving sleep architecture, and shortening sleep onset latency. Unlike melatonin, DSIP does not directly act on melatonin receptors but regulates sleep through endogenous pathways. It avoids side effects like morning dizziness or dependency, naturally enhancing sleep quality.

     Neuroprotection and Anti-stress Effects: DSIP activates neuroprotective signaling pathways (PI3K/Akt) to inhibit neuronal apoptosis, reducing damage from oxidative stress and glutamate excitotoxicity. It also modulates hypothalamic-pituitary-adrenal (HPA) axis function, lowering stress hormone (cortisol) levels to mitigate neurotoxicity and cognitive decline caused by chronic stress. In cerebral ischemia models, it enhances HPA axis function to reduce stress hormone (cortisol) levels, alleviating neurotoxicity and cognitive decline induced by chronic stress. -pituitary-adrenal axis (HPA axis) function, lowering stress hormone (cortisol) levels to alleviate neurotoxicity and cognitive decline caused by chronic stress. In cerebral ischemia models, it enhances neuronal survival rates and improves neurological recovery.

     Cognitive Enhancement and Mood Regulation: DSIP improves deep sleep quality, promotes synaptic plasticity repair in hippocampal neurons, and enhances learning and memory capacity. It also regulates neurotransmitter balance (e.g., serotonin, dopamine) to alleviate anxiety and depression-related emotional disorders, and improves stress-induced cognitive decline (such as memory impairment caused by exam or work pressure).

     Safety Advantages: As an endogenous peptide, DSIP exhibits exceptional biocompatibility with no cytotoxicity (MTT assay shows >98% neuronal survival at concentrations ≤5 μmol/L), no mutagenicity, and no reproductive toxicity. Long-term use carries no risk of addiction or withdrawal symptoms, with only mild adverse effects (occasional transient drowsiness), making it suitable for sustained sleep regulation and neural maintenance.