Abstract
Purpose
The aim of this work was to formulate and characterize surfactant-free glibenclamide nanoparticles using Eudragit RLPO and polyethylene glycol as sole stabilizer.
Methods
Glibenclamide nanoparticles were obtained by nanoprecipitation and evaluated in terms of drug content, encapsulation efficiency, apparent saturation solubility, drug release profile, solid state and storage stability. The influence of different stirring speed on the particle size, size distribution and zeta potential of the nanoparticles was investigated. The nanoparticle biocompatibility and permeability were analyzed in vitro on Caco-2 cell line (clone HTB-37) and its interaction with mucin was also investigated.
Results
It was found that increasing the molecular weight of polyethylene glycol from 400 to 6000 decreased drug encapsulation, whereas the aqueous solubility and dissolution rate of the drug increased. Particle size of the nanoformulations, with and without polyethylene glycol, were between 140 and 460 nm. Stability studies confirmed that glibenclamide nanoparticles were stable, in terms of particle size, after 120 days at 4°C. In vitro studies indicated minimal interactions of glibenclamide nanoparticles and mucin glycoproteins suggesting favorable properties to address the intestinal mucus barrier. Cell viability studies confirmed the safety profile of these nanoparticles and showed an increased permeation through epithelial cells.
Conclusion
Taking into consideration these findings, polyethylene glycol is a useful polymer for stabilizing these surfactant-free glibenclamide nanoparticles and represent a promising alternative to improve the treatment of non-insulin dependent diabetes.
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Funding
The authors acknowledge financial support from the Universidad Nacional de Rosario (U.N.R., Rosario, Argentina), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Argentina) and Deutscher Akademischer Austauschdienst (DAAD, Deutschland). ECA thanks to CONICET for a Ph.D. fellowship. OH thanks to the EU Horizon 2020 research and innovation programme under grant Agreement N° 720905–2.
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Arrua, E.C., Hartwig, O., Ho, DK. et al. Surfactant-Free Glibenclamide Nanoparticles: Formulation, Characterization and Evaluation of Interactions with Biological Barriers. Pharm Res 38, 1081–1092 (2021). https://doi.org/10.1007/s11095-021-03056-2
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DOI: https://doi.org/10.1007/s11095-021-03056-2