Polymer-Zn(II) sunscreens for protection against harmful blue ray

Area of Science:

• Materials Science
• Biomaterials Engineering
• Photochemistry

Background:

• Harmful blue rays (HBRs) from sunlight and devices cause skin photoaging.
• Current sunscreens and anti-HBR materials lack efficacy and suitability for skin protection.

Purpose of the Study:

• To develop a novel polymer-metal complex for effective HBR blocking and skin photoprotection.
• To evaluate the complex's safety and efficacy in preventing HBR-induced skin damage.

Main Methods:

• Synthesized a polymer-metal complex (P-Zn(II)) using hydroxyquinoline and Zn(II) via the Biginelli reaction.
• Assessed the complex's HBR-blocking capability through spectral analysis.
• Investigated the complex's protective effects on fibroblasts against HBR-induced damage.
• Evaluated in vivo skin irritation and systemic toxicity in mouse models.

Main Results:

• The P-Zn(II) complex effectively shielded against both UVRs and HBRs due to spectral redshift.
• It protected fibroblasts from HBR-induced cell death, oxidative stress, and aging.
• In vivo studies showed minimal skin irritation and low hepatic/renal toxicity.
• The complex demonstrated significant prevention of HBR-induced skin damage in mice.

Conclusions:

• Polymer-metal ion complexes show potential as advanced photoprotective materials.
• The developed P-Zn(II) complex offers a viable solution for HBR skin protection, addressing limitations of current products.
• This research provides insights for developing novel anti-HBR biomaterials.