A comparative transmission electron microscopy study of titanium dioxide and carbon black nanoparticles uptake in human lung epithelial and fibroblast cell lines.

Esther Belade 1, 2, * Lucie Armand 1, 2 Laurent Martinon 3 Laurence Kheuang 2, 1 Jocelyne Fleury-Feith 4 Armelle Baeza-Squiban 5 Sophie Lanone 1, 2 Marie-Annick Billon-Galland 3 Jean-Claude Pairon 1, 2 Jorge Boczkowski 1, 2, 6
* Auteur correspondant
1 IMRB - Institut Mondor de Recherche Biomédicale
2 Hôpital Henri Mondor
3 LEPI - Laboratoire d'Etude des Particules Inhalées
4 Laboratoire d'histologie et de biologie tumorale
5 LCTC - Laboratoire de Cytophysiologie et Toxicologie Cellulaire
6 Service de pneumologie et pathologie professionnelle
Abstract : Several studies suggest that the biological responses induced by manufactured nanoparticles (MNPs) may be linked to their accumulation within cells. However, MNP internalisation has not yet been sufficiently characterised. Therefore, the aim of this study was to compare the intracellular uptake of three different MNPs: two made of carbon black (CB) and one made of titanium dioxide (TiO(2)), in 16HBE bronchial epithelial cells and MRC5 fibroblasts. Transmission electron microscopy was used to evaluate the intracellular accumulation. Different parameters were analysed following a time and dose-relationship: localisation of MNPs in cells, percentage of cells having accumulated MNPs, number of aggregated MNPs in cells, and the size of MNP aggregates in cells. The results showed that MNPs were widely and rapidly accumulated in 16HBE cells and MRC5 fibroblasts. Moreover, MNPs accumulated chiefly as aggregates in cytosolic vesicles and were absent from the mitochondria or nuclei. CB and TiO(2) MNPs had similar accumulation patterns. However, TiO(2) aggregates had a higher size than CB aggregates. Intracellular MNP accumulation was dissociated from cytotoxicity. These results suggest that cellular uptake of MNPs is a common phenomenon occurring in various cell types.
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Toxicology in Vitro, Elsevier, 2012, 26 (1), pp.57-66. 〈10.1016/j.tiv.2011.10.010〉
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http://www.hal.inserm.fr/inserm-00673352
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Soumis le : jeudi 23 février 2012 - 13:54:11
Dernière modification le : mercredi 21 mars 2018 - 18:57:34
Document(s) archivé(s) le : jeudi 24 mai 2012 - 02:53:20

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Esther Belade, Lucie Armand, Laurent Martinon, Laurence Kheuang, Jocelyne Fleury-Feith, et al.. A comparative transmission electron microscopy study of titanium dioxide and carbon black nanoparticles uptake in human lung epithelial and fibroblast cell lines.. Toxicology in Vitro, Elsevier, 2012, 26 (1), pp.57-66. 〈10.1016/j.tiv.2011.10.010〉. 〈inserm-00673352〉

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