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Updated: Jul 31, 2026
Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
Computational simulation on the study of Tacrolimus and its improved dermal retention using Poly(Ԑ-caprolactone)
Paulo Vitor Farago1, Guilherme Dos Anjos Camargo2, Matheus Benedito Mendes3
1Laboratory of Drug Development and Industrial Pharmacy, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmaceutical Sciences, State University of Ponta Grossa, Ponta Grossa, PR, 84030-900, Brazil; National Center for Natural Products Research, School of Pharmacy, University of Mississippi, MS, 38677, USA.
Computational simulations and nanotechnology enhance understanding of tacrolimus (TAC) for autoimmune skin diseases. Nanocapsules improve drug retention but reduce permeation, offering insights for topical delivery strategies.
Area of Science:
- Computational chemistry and materials science
- Pharmacology and drug delivery
- Dermatology and immunology
Background:
- Tacrolimus (TAC) is a natural drug used topically for autoimmune skin diseases like atopic dermatitis, psoriasis, and vitiligo.
- Computational simulations can predict drug properties, while nanotechnology offers improved delivery systems.
- Reducing topical tacrolimus dose and side effects requires optimized delivery and understanding drug behavior.
Purpose of the Study:
- To computationally determine molecular, electronic, and vibrational properties of tacrolimus using semi-empirical (SE) and Density Functional Theory (DFT) methods.
- To prepare and evaluate tacrolimus-loaded poly(ε-caprolactone) nanocapsules for topical delivery.
- To assess in vitro drug permeation and retention using Franz diffusion cells and photoacoustic spectroscopy.
Main Methods:
- Quantum mechanics-based computational simulations (SE and DFT) for tacrolimus property calculations.
- Preparation of tacrolimus-loaded poly(ε-caprolactone) nanocapsules via interfacial polymer deposition and solvent displacement.
- In vitro permeation studies using Franz diffusion cells and drug retention analysis via photoacoustic spectroscopy on Strat-M® membranes.
Main Results:
- Computational simulations showed good agreement with tacrolimus geometry and electronic properties, with SE/DFT and DFT/DFT methods providing better spectral predictions.
- Tacrolimus-loaded nanocapsules demonstrated reduced permeation across the Strat-M® membrane compared to the drug solution.
- Photoacoustic spectroscopy confirmed higher retention of nanocapsules within the membrane, indicating potential for sustained topical release.
Conclusions:
- Computational methods provide valuable insights into tacrolimus properties, aiding in drug characterization.
- Poly(ε-caprolactone) nanocapsules offer enhanced dermal retention of tacrolimus, a desirable trait for topical applications.
- The study highlights a trade-off between permeation and retention, crucial for designing effective topical tacrolimus formulations.
