Aim of this work was to study the technological parameters influencing the adsorption process of Bovine Serum Albumin
(used as model protein) on the surface of PLGA (polylactic co-glycolic acid) based nanoparticles. Several factors as adsorption mediums,
concentration ratio between proteins and nanoparticles, temperature, time of incubation were evaluated and main importance was done to
the chemical characteristics of polymers and surfactants used for nanoparticles obtainment. Afterward adsorption studies, further tests of
permeation through cellular monolayers and synthetic membranes were done in order to study the desorption process of BSA from
nanoparticles surface. The mediums influence on the desorption rate of the protein from the nanoparticles and the influence of polymeric
excipients on the permeation profile of the protein were evaluated.
Data showed demonstrated that the adsorption process as well as the desorption capability and the permeation rate of BSA are strictly influenced
by the nanoparticles composition and several kind of interactions between polymers and protein.
Keywords: Adsorption process, β-cyclodextrins, bovine serum albumin, differential scanning calorimetry, fourier transform infrared spectroscopy, nanoparticles, nasal delivery, PLGA
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