Study summary · research use only
Enhanced Skin Permeation of Anti-wrinkle Peptides via Molecular Modification
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This in vitro study, using human skin and primary human dental pulp stem cell-derived neurons, examined four peptide analogues — Argireline (Arg0), Arg1, Arg2, and Arg3 — for skin permeation and wrinkle-reduction properties, following chemical modification intended to reduce zwitterion formation and increase skin permeability. The abstract describes Argireline (Arg0) as a mimetic of Botox reported elsewhere to reduce wrinkles by up to 48% over 4 weeks of twice daily treatment, though Arg0 itself showed poor skin permeation. The peptides were dissolved in propylene glycol and water co-solvents; Arg2 and Arg3 showed enhanced human skin permeation in vitro, and measuring inhibition of glutamate release from the neurons showed Arg3 with the greatest inhibition, followed by Arg1, Arg0, and Arg2.
Abstract
Wrinkles can have a negative effect on quality of life and Botox is one of the most effective and common treatments. Argireline (Arg0), a mimetic of Botox, has been found to be safer than Botox and effective in reducing wrinkles, with efficacies up to 48% upon 4 weeks of twice daily treatment. However, the skin permeation of Arg0 is poor, due to its large molecular weight and hydrophilicity. Arg0 exists in zwitterionic form and this charged state hindered its skin permeation. Chemical modification of the peptide structure to reduce the formation of zwitterions may result in increased skin permeability. We investigated a total of 4 peptide analogues (Arg0, Arg1, Arg2, Arg3), in terms of skin permeation and wrinkle reduction. The 4 peptides were dissolved in various propylene glycol and water co-solvents. Enhanced human skin permeation was demonstrated by both Arg2 and Arg3 in vitro. On the other hand, the abilities of the 4 analogues to reduce wrinkle formation were also compared using primary human dental pulp stem cells derived neurons. By measuring the inhibition of glutamate release from the neurons in vitro, it was shown that Arg3 was the most effective, followed by Arg1, Arg0 and Arg2.
pepmg summarizes the peer-reviewed literature and links to every source — it sells nothing, ships nothing, and gives no medical, dosing, or human-use guidance. Don't just trust this summary: follow the citation to its source and read it yourself. Research use only.