Positively and negatively surface-charged chondroitin sulfate-trimethylchitosan nanoparticles as protein carriers

Carbohydr Polym. 2016 Feb 10:137:532-540. doi: 10.1016/j.carbpol.2015.10.095. Epub 2015 Nov 4.

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 ∼ 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.

Keywords: Cell uptake; Chondroitin sulfate; Cytotoxicity; Nanoparticles; Trimethylchitosan; Zeta potential.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Cell Line, Tumor
  • Cell Survival / drug effects
  • Chitosan / analogs & derivatives*
  • Chondroitin Sulfates / chemistry*
  • Human Umbilical Vein Endothelial Cells
  • Humans
  • Nanocapsules / adverse effects
  • Nanocapsules / chemistry*
  • Static Electricity

Substances

  • Nanocapsules
  • Chondroitin Sulfates
  • Chitosan