BSA adsorption on differently charged polystyrene nanoparticles using isothermal titration calorimetry and the influence on cellular uptake.

Abstract:

:BSA adsorption onto negatively and positively charged polystyrene nanoparticles was investigated. The nanoparticles were characterized in terms of particle size, zeta potential, surface group density, and morphology. The adsorption behavior of BSA on the particle surface, as a function of pH and overall charge of the particle, was studied using ITC. Different thermodynamic data such as enthalpy changes upon binding and stoichiometry of the systems were determined and discussed. The degree of surface coverage with BSA was calculated using the thermodynamic data. The cellular uptake of particles before and after BSA adsorption was studied using HeLa cells in the presence and absence of supplemented FCS in the cell culture medium.

journal_name

Macromol Biosci

authors

Baier G,Costa C,Zeller A,Baumann D,Sayer C,Araujo PH,Mailänder V,Musyanovych A,Landfester K

doi

10.1002/mabi.201000395

subject

Has Abstract

pub_date

2011-05-12 00:00:00

pages

628-38

issue

5

eissn

1616-5187

issn

1616-5195

journal_volume

11

pub_type

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