Systematic study of drug distribution profiles of different nanocarriers in the skin layers: a more accurate and targeted delivery

Authors

  • Manuela de Castilhos França Gonçalves Programa de Pós-Graduação em Ciências Farmacêuticas - Universidade Federal do Rio Grande do Sul image/svg+xml https://orcid.org/0009-0003-5755-619X
  • Kelly Cristine Zatta Programa de Pós-Graduação em Ciências Farmacêuticas - Universidade Federal do Rio Grande do Sul image/svg+xml https://orcid.org/0000-0003-2234-7948
  • Adriana Raffin Pohlmann Programa de Pós-Graduação em Ciências Farmacêuticas, Departamento de Química Orgânica, Instituto de Química - Universidade Federal do Rio Grande do Sul image/svg+xml
  • Silvia Stanisçuaski Guterres Programa de Pós-Graduação em Ciências Farmacêuticas, Programa de Pós-Graduação em Nanotecnologia Farmacêutica; Programa de Pós-Graduação em Farmácia, Faculdade de Farmácia - Universidade Federal da Bahia - Universidade Federal do Rio Grande do Sul image/svg+xml

DOI:

https://doi.org/10.22456/2527-2616.143983

Keywords:

Lipid core nanocapsule, nanoemulsion, Log D, in vitro release, skin penetration, skin permeation

Abstract

The aim of this work was to evaluate the skin distributions of two drugs with different logarithm of the distribution coefficient (Log D) values. Melatonin (MEL; Log D 1.74) and benzophenone-3 (BZA-3; Log D 3.88) lipid core nanocapsules (LNCs) were prepared with poly(e-caprolactone) (PCL) of different molar weights (14,000 g mol-1 and 80,000 g mol-1), capric/caprylic triglyceride, sorbitan monostearate and polysorbate 80, and nanoemulsions (NE) were similarly prepared without polymer. In vitro release experiments combined with in vitro percutaneous penetration/permeation data demonstrated that the localization of the substance in the nanoparticles (determined by Log D) is crucial for understanding their diffusion behavior. The results demonstrated that substances of moderate lipophilicity, such as MEL, are affected by the molar mass of the polymer since the use of 80,000 g mol-1 PCL in the particle composition (LNC80MEL) guaranteed a greater encapsulation efficiency (EE%) (55%). On the other hand, the percutaneous distribution profile of substances with high lipophilicity, such as BZA-3, is not influenced by the molar mass of the polymer since for all formulations containing BZA-3, the EE% was approximately 99%. However, the presence of a polymer in the nanocapsule (LNC) tends to promote greater retention of the substance at the stratum corneum level, while its absence (NE) allows penetration of the particle through the skin layers and drives a higher concentration of BZA-3 into the dermis.

 

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References

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Published

28-12-2024 — Updated on 30-03-2026

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How to Cite

Gonçalves, M. de C. F., Zatta, K. C., Pohlmann, A. R., & Guterres, S. S. (2026). Systematic study of drug distribution profiles of different nanocarriers in the skin layers: a more accurate and targeted delivery. Drug Analytical Research, 8(2), 50–66. https://doi.org/10.22456/2527-2616.143983 (Original work published December 28, 2024)

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ORIGINAL ARTICLES