Hydrophilic polymeric nanoparticles prepared from Delonix galactomannan with low cytotoxicity for ocular drug delivery

Author(s)

Ogunjimi, Abayomi T. ; Melo, Shaiani M. G. ; Vargas-Rechia, Carem G. ; Emery, Flavio S. ; Lopez, Renata F. V.

• Document type: Journal article
• Source: Carbohydrate Polymers; v. 157, p. 1065-1075, FEB 10 2017.
• Web of Science Citations: 12

Abstract

Delonix is a galactomannan polysaccharide extracted from the endosperm of Delonix regia plant. This study aims at the development of Delonix nanoparticle and assesses its potential for ocular delivery by evaluating its in-vitro stability, toxicity and cellular uptake. Fluorescent nanoparticles (BODIPY-loaded nanoparticles) were prepared by a Quality-by-Design modified nanoprecipitation technique. Optimized nanoparticles had mean sizes <240 nm, PdI <0.2 and zeta potential of <-30 mV. Mixture of surfactants with different hydrophilic-lipophilic balance controlled nanoparticle swelling. Nanoparticles, which were stable in the presence of simulated lachrymal fluid and lysozyme also sustained the release of BODIPY. In-vitro studies suggest no toxicity of the nanoparticles in concentration range of 100-1483.3 mu g/mL on retinal and corneal epithelial cells. Flow cytometry and confocal microscopy techniques showed that retinal cells but not corneal cells, uptake 18% of the nanoparticles. Therefore, Delonix nanoparticles could be a safe and promising tool for ocular drug delivery. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 14/22451-7 - Sustained drug delivery systems targeting the epithelial tissue
• Grantee: Renata Fonseca Vianna Lopez
• Support Opportunities: Research Projects - Thematic Grants