Positively and negatively surface-charged chondroitin sulfate-trimethylchitosan nanoparticles as protein carriers.
Carbohydr Polym
; 137: 532-540, 2016 Feb 10.
Article
em En
| MEDLINE
| ID: mdl-26686160
ABSTRACT
Positively and negatively surface-charged nanoparticles (NPs) were prepared with chondroitin sulfate (ChS) and trimethylchitosan (TMC). NP size, surface charge, formation yield, and water content were investigated as a function of weight ratio and concentration. Size and zeta potential were controlled by varying the ChS/TMC mass ratio. FTIR spectra revealed interactions among composite NP constituents. TEM images showed that the NPs were nearly spherical, with an average size of â¼ 300 nm. Encapsulation efficiency increased in positively charged NPs with increases in fluorescein isothiocyanate-bovine serum albumin concentration. Negatively charged NPs had only 10-20% encapsulation efficiency. The release profile, release kinetics and mechanism of positively charged ChS-TMC NPs were studied in vitro. NP cytocompatibility and uptake were verified ex vivo. Both types of NPs were taken up and retained in cells. A549 cells took up more positively charged (49.4%) than negatively charged (35.5%) NPs.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Sulfatos de Condroitina
/
Quitosana
/
Nanocápsulas
Limite:
Humans
Idioma:
En
Revista:
Carbohydr Polym
Ano de publicação:
2016
Tipo de documento:
Article