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Synthèse et propriétés de monocristaux, de poudres, films minces ou hétérostructures

Etudes à l'interface avec la matière biologique

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Publication de Guillaume Lefebvre 2021

Publié le 8 avril 2021
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Communiqué du 8 avril 2021 au 17 juin 2021

L'article intitulé "Adsorption rate constants of therapeutic proteins and surfactants for material surfaces" a été publié dans Colloids and Surfaces B: Biointerfaces

IMBM adsorption

IMBM adsorption

Ici vous trouverez l'article de Guillaume Lefebvre
"Adsorption of therapeutic proteins to material surfaces can be a pivotal issue in drug development, especially for low concentration products. Surfactants are used to limit adsorption losses. For each formulation component, surface adsorption is the result of a combination of its diffusion and surface adsorption rates. The latter are difficult to measure accurately because a depletion layer forms rapidly in the bulk solution above a bare surface, slowing down adsorption. Adapting flow conditions and local surface chemistry, we are able to minimize depletion limitations and measure apparent adsorption rate constants of three monoclonal antibodies, other proteins and surfactants with a hydrophobic surface. We show that surface adsorption rates scale with the molecular mass of the molecule, with polysorbates therefore showing thousand times slower rates than antibodies. Moreover, we observed that the desorption dynamic of polysorbates from a given hydrophobic surface depends on surface coverage, whereas this is not the case for Poloxamer 188. These novel contributions to surface adsorption dynamics enable a new perspective on the evaluation of drug surface compatibility and can, together with diffusion rates, be used to predict the protective potential of surfactants in given conditions."
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mise à jour le 8 avril 2021

  • Tutelle CNRS
  • Tutelle Grenoble INP
Université Grenoble Alpes