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Shape-Dependent Skin Penetration of Silver Nanoparticles: Does It Really Matter?
Yu Kyung Tak1, Sukdeb Pal2, Pravin K Naoghare2
1College of Pharmacy, Seoul National University, Seoul 151-742, South Korea.
Scientific Reports
|November 21, 2015
Summary
This study shows that silver nanoparticle shape affects skin penetration via intercellular routes, not just follicular ones. Optimizing AgNP shape is key for effective topical antibacterial agents with reduced systemic toxicity.
Area of Science:
- Nanotechnology
- Materials Science
- Dermatology
Background:
- Nanoparticles (NPs) offer diverse applications, but their skin penetration is critical for topical antibacterial agents.
- Current research primarily links NP skin penetration to size and follicular pathways.
- Systemic toxicity is a concern for topical NP-based treatments.
Purpose of the Study:
- To investigate the impact of silver nanoparticle (AgNP) shape on skin permeability and diffusion.
- To evaluate AgNP penetration rates and depth via intercellular pathways.
- To establish a proof-of-concept for shape-dependent AgNP skin interactions.
Main Methods:
- Utilized in vitro and in vivo models to assess skin penetration.
- Compared differently shaped silver nanoparticles (AgNPs).
- Analyzed variations in skin permeability, diffusion coefficients, penetration rates, and depth.
Main Results:
- Demonstrated that AgNP shape significantly influences skin permeability and diffusion coefficients.
- Observed distinct penetration rates and depths for various AgNP shapes via intercellular routes.
- Highlighted the role of active metallic facets in shape-dependent skin penetration.
Conclusions:
- AgNP shape is a critical determinant of skin penetration, influencing efficacy and toxicity.
- Intercellular pathways are significant for AgNP skin transport, in addition to follicular routes.
- Tailoring AgNP shape can optimize topical antibacterial formulations for enhanced efficacy and safety.
