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Published on: March 24, 2017
Antibacterial, Anti-Inflammatory and Anti-Melanogenic Effects of a Novel Peptide
Mina Song1, Jeong Hyeon Lee1, Si-Eun Park2
1Department of Dermatology, Brain Korea 21 Project, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Background:
Acne-induced post-inflammatory hyperpigmentation (PIH) is driven by Cutibacterium acnes-mediated inflammation and dysregulated melanogenesis; however, effective treatments targeting both processes remain limited.
Objective:
This study aimed to evaluate the anti-bacterial, anti-inflammatory, and anti-melanogenic effects of a newly made 2-isopropyl-5-methylphenol-conjugated valine-tryptophan dipeptide (2IP5MP-VW).
Methods:
IPMP-VW conjugates were synthesized and screened for antibacterial activity against C. acnes. The effects of 2IP5MP-VW on inflammation and melanogenesis were assessed using Raw 264.7 macrophages and Mel-ab cells, and ex-vivo human skin.
Results:
Among the synthesized candidates, 2IP5MP-VW showed the strongest antibacterial activity against C. acnes. 2IP5MP-VW suppressed lipopolysaccharide-induced nitric oxide (NO) production via downregulation of inducible NO synthase without cytotoxicity. It also reduced melanin content in both unstimulated and forskolin-stimulated melanocytes. In ex vivo human skin, 2IP5MP-VW showed a decreasing trend in ultraviolet B-induced melanin accumulation.
Conclusion:
2IP5MP-VW exhibits multifunctional anti-bacterial, anti-inflammatory, and anti-melanogenic activities, suggesting its potential as a candidate for the management of acne-induced PIH.
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