SNAP-8Also known as: Acetyl Octapeptide-3

Mechanism of Action

SNAP-8 is a synthetic peptide fragment derived from the SNAP-25 protein involved in neurotransmitter release at neuromuscular junctions. It modulates the SNARE complex by interfering with the formation of SNARE proteins essential for synaptic vesicle fusion and neurotransmitter release. This inhibition reduces muscle contraction by lessening acetylcholine release, leading to decreased facial muscle movement and reducing expression wrinkles. Hence, it produces a mild muscle-relaxing effect similar to botulinum toxin but less potent.

Reported Research Benefits

Used extensively in preclinical and in vitro research to study neuromuscular signal modulation, muscle relaxation, and anti-wrinkle effects. It is investigated as a topical anti-aging ingredient to improve skin elasticity, reduce expression lines, and stimulate collagen synthesis. Also valuable in cosmetic research as a gentle alternative to botulinum toxin for wrinkle reduction.

Dosing Protocol & Reconstitution

Typically supplied as a lyophilized powder to be reconstituted with bacteriostatic water; concentrations are usually calculated using peptide calculators. Experimental topical formulations often contain SNAP-8 at concentrations ranging from 0.1% to 10%. For in vitro studies, dosing varies widely depending on assay and cellular model. No standardized human dosing exists as it is not approved for clinical use.

Research Notes

Research shows that SNAP-8 can reduce wrinkle depth and muscle contractility in cellular and skin models. It acts with a shorter half-life and milder effect compared to botulinum toxin, allowing safer cosmetic application in theory. Purity of >99% is essential for reproducibility in research. There are ongoing investigations into its efficacy with repeated use and impact on collagen metabolism.

Research Summary

SNAP-8 (Acetyl Octapeptide-3) is a cosmetic peptide that competitively inhibits the SNARE complex formation responsible for neuromuscular acetylcholine release, reducing facial muscle contraction intensity and the appearance of expression lines. Clinical studies show a 63% reduction in wrinkle depth with topical application and improvement in skin smoothness. It is considered a topical alternative to botulinum toxin.

Side Effects & Safety

Excellent tolerability in cosmetic use — no systemic effects as topical absorption is minimal. Rare local skin irritation or redness at application site. No neurotoxicity at cosmetic doses.

Stability & Storage

Refer to research notes

Molecular Data

Sequence: Ac-Glu-Glu-Met-Gln-Arg-Arg-Ala-Ala-NH2
Molecular Formula: C_48H_82N_14O_15
Molecular Weight: 1034.3 g/mol
CAS Number: 86031-31-4
IUPAC Name: N-acetyl-L-glutamyl-L-glutamyl-L-methionyl-L-glutaminyl-L-arginyl-L-arginyl-L-alanyl-L-alanine amide

Primary literature: https://pubmed.ncbi.nlm.nih.gov/?term=SNAP-8+acetyl+octapeptide+botox+wrinkles