In vitro study of boehmite nanoparticles toxicity.
type: Dataset
contact point: Organization
  fn: CCSD
keyword: theses
keyword: adsorption-tnf
keyword: nanoparticules
keyword: spiotherengineering-sciences-physicsother
keyword: infoeu-reposemanticsdoctoralthesis
keyword: in-vitro-toxicity
keyword: toxicite-in-vitro
keyword: boehmite
keyword: tnf--adsorption
keyword: caracterisations-physico-chimiques
keyword: nanoparticles
keyword: raw-2647macrophages
keyword: physico-chemical-characterization
keyword: macrophages-raw-2647
landing page: https://theses.hal.science/tel-00782444
description: This study aimed at a better understanding of the biological effects of boehmite nanoparticles by carrying out in vitro tests using a macrophage-like cell line (RAW 264.7), as macrophages represent the first target cells in the respiratory tract. Different cellular responses: inflammation (evaluated by the release of TNF-α), cell death (assessed by the release of LDH), and oxidative stress (production of ROS) were studied in relation to physico-chemical properties of the particles. In the first part of this work, the biological activity was measured using boehmite nanoparticles obtained either from industrial environment or by hydrothermal synthesis, and after grinding or dispersion that enabled us to observe the influence of particle size on the cellular response.The results point out that industrial boehmite particles are mainly characterized by a moderate pro-inflammatory activity, no cytotoxic effect and no significant oxidative stress. Differences depending on the size of the particles were observed on the inflammatory and cytotoxic parameters.However, the assessment of biomolecules released into cell culture supernatants may be biased by the adsorption of biomolecules on the nanoparticles. Thus, the adsorption mechanism must be fully understood to avoid misinterpretation of the results. Therefore, the second aims of this work were to develop a methodology to assess the organo-mineral interactions in terms of affinity and quantity of biomolecules adsorbed on the nanoparticles at the thermodynamic equilibrium and to determine a correction law. We focused more specifically our study on TNF-α.
identifier: NNT: 2012EMSE0646
issued: 2026-05-14T20:13:57.502656
language: fr
modified: 2026-05-14T20:13:57.502661

In vitro study of boehmite nanoparticles toxicity.
type: Distribution
access URL: https://theses.hal.science/tel-00782444
format: HTML
issued: 2026-05-14T20:13:57.508909
modified: 2026-05-14T20:13:57.466407

test_moissonnage_selune
type: Agent