Journal
CARBOHYDRATE POLYMERS
Volume 157, Issue -, Pages 1065-1075Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.10.076
Keywords
Cellular uptake; Cytotoxicity; Delonix polymeric nanoparticles; Ocular delivery; Quality by design
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Funding
- Sao Paulo Research Foundation (FAPESP) [2014/22451-7]
- World Academy of Science-Brazilian National Council for Scientific and Technological Development (TWAS-CNPq) [190007/2013-3]
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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.
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