Easy to use particle-mediated transport of various dissolved active agents into the hair follicles - A novel platform technology.
Summary
Adding submicron particles (nanocrystals or lipid submicron particles) to a dissolved active markedly increased hair follicle penetration depth by 160–190%, independent of particle type or sphericity. The platform worked for small and large molecules, enabling targeting of subinfundibular structures and broadening options for transfollicular delivery in dermatology and cosmetics.
Key Findings
- Submicron particle addition increased follicular penetration depth by 160–190%.
- Effect was independent of particle type/sphericity (nanocrystals vs lipid particles).
- Platform effective for both small and large molecules (fluorescein sodium, 6-CF, GFP, FITC-BSA).
- Enabled targeting of subinfundibular follicular structures, expanding delivery reach.
Clinical Implications
Guides development of topical therapeutic and cosmetic products that harness follicular targeting to increase local bioavailability, potentially lowering doses and irritation while improving outcomes in conditions like alopecia or folliculitis.
Why It Matters
Provides a simple, generalizable, and low-cost formulation principle to exploit the follicular route for diverse actives, with potential to reshape topical product design and improve efficacy and safety.
Limitations
- Preclinical/ex vivo focus without clinical efficacy or safety data
- Detailed in vivo pharmacokinetics and long-term follicular safety not assessed
Future Directions
Quantify in vivo delivery gains and clinical outcomes in target indications; optimize particle size and concentration; evaluate safety, irritation, and microbiome effects in human studies.
Study Information
- Study Type
- Case series
- Research Domain
- Treatment
- Evidence Level
- V - Preclinical/ex vivo experimental platform demonstration without clinical outcomes
- Study Design
- OTHER