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A pendant peptide endows a sunscreen with water-resistance
Aubrey J Ellison1, Ronald T Raines
1Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.
Organic & Biomolecular Chemistry
|September 27, 2018
Summary
New sunscreen filters bind to skin. This collagen-binding strategy improves wash-resistance, potentially enhancing UV protection and reducing cancer risk.
Area of Science:
- Biochemistry
- Materials Science
- Dermatology
Background:
- Ultraviolet (UV) radiation exposure is a primary cause of skin cancer.
- Current sunscreen filters, like salicylic acid, are easily washed off skin.
- Improved sunscreen adhesion is needed for effective, long-lasting UV protection.
Purpose of the Study:
- To develop a novel method for enhancing sunscreen retention on skin.
- To investigate the use of collagen mimetic peptides for improved sunscreen adhesion.
- To assess the wash-resistance of UV filters conjugated to peptides.
Main Methods:
- Synthesizing salicylic acid conjugated to a collagen mimetic peptide.
- Applying the conjugated filter to collagen-containing skin surrogates.
- Testing the retention of the conjugated filter after repeated washing cycles.
Main Results:
- The collagen mimetic peptide successfully retained salicylic acid on skin surrogates.
- Conjugation significantly improved the wash-resistance of the UV filter.
- This modular strategy demonstrated enhanced adhesion compared to unconjugated filters.
Conclusions:
- Conjugating UV filters to collagen mimetic peptides offers a promising strategy for improving sunscreen water-resistance.
- This approach could lead to more effective and durable sun protection products.
- Further research may explore this method for enhanced delivery of other topical agents.
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