In vitro studies of antimicrobial activity of Gly-His-Lys conjugates as potential and promising candidates for therapeutics in skin and tissue infections.
Kukowska. Monika M; Kukowska-Kaszuba. Magdalena M; Dzierzbicka. Krystyna K
Key Findings
- Gly‑His‑Lys (GHK) conjugates with fatty acids showed strong to moderate antimicrobial activity in vitro.
- Compound 1d was the most potent, inhibiting E. coli and S. aureus at 31.3‑125 µg/mL and P. aeruginosa at 375‑500 µg/mL.
- Conjugates 1d and 5b killed Gram‑positive bacteria rapidly at 2‑4× the minimum inhibitory concentration.
Practical Outcomes
- For biohackers interested in skin health, these findings suggest that GHK‑based topical formulations could have antimicrobial benefits, but they are far from ready for personal use. More research is needed to confirm safety, optimal dosing, and real‑world effectiveness before considering any DIY or supplement approach.
Summary
Researchers tested lab-made versions of the GHK peptide linked to fatty acids and found they can kill bacteria and fungi in petri dishes. The most powerful compounds stopped common skin bugs like E. coli, Staph aureus, and Pseudomonas at relatively low concentrations, and they acted quickly. However, the work is only in vitro, with no data on safety or effectiveness on real skin or in people.
Abstract
In this Letter, we presented in vitro studies of antimicrobial activity of Gly-His-Lys conjugates that are important point in preliminary biological evaluation of their potential application in skin and tissue therapies. The novel compounds include the conjugation of fatty acids with a modification of the amino acid sequence in the primary structure of Gly-His-Lys (6i). All the compounds exhibited strong to moderate activity. Compound 1d had the most potent antimicrobial activity at MIC ranges 31.3-125.0μg/mL (against Escherichia coli spp. and Staphylococcus aureus spp.), 375.0-500.0μg/mL (against Pseudomonas aeruginosa spp.). Conjugate 5b expressed activity against Staphylococcus aureus spp. and Escherichia coli spp. at MIC ranges 250.0-500.0μg/mL and 62.5-125.0μg/mL, respectively. Both conjugates 1d and 5b possessed rapid bactericidal activity against Gram-positive bacteria at 2MIC or 4MIC. Conjugates 1b-c, 1e, 2a-b and 4b showed noticeable effect against both Gram-positive and Gram-negative bacteria. Compounds 1d, 1e and 2e were the most active against fungus.
Study Information
pubmed
2014
2014-12-16T00:00:00.000Z
10.1016/j.bmcl.2014.12.029
9
35