Differential stress reaction of human colon cells to oleic-acid-stabilized and unstabilized ultrasmall iron oxide nanoparticles.

Détails

Ressource 1Télécharger: BIB_E6C976ADA7B4.P001.pdf (6125.84 [Ko])
Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_E6C976ADA7B4
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Differential stress reaction of human colon cells to oleic-acid-stabilized and unstabilized ultrasmall iron oxide nanoparticles.
Périodique
International Journal of Nanomedicine
Auteur(s)
Schütz C.A., Staedler D., Crosbie-Staunton K., Movia D., Chapuis Bernasconi C., Kenzaoui B.H., Prina-Mello A., Juillerat-Jeanneret L.
ISSN
1178-2013 (Electronic)
ISSN-L
1176-9114
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
9
Pages
3481-3498
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't Publication Status: epublish
Résumé
Therapeutic engineered nanoparticles (NPs), including ultrasmall superparamagnetic iron oxide (USPIO) NPs, may accumulate in the lower digestive tract following ingestion or injection. In order to evaluate the reaction of human colon cells to USPIO NPs, the effects of non-stabilized USPIO NPs (NS-USPIO NPs), oleic-acid-stabilized USPIO NPs (OA-USPIO NPs), and free oleic acid (OA) were compared in human HT29 and CaCo2 colon epithelial cancer cells. First the biophysical characteristics of NS-USPIO NPs and OA-USPIO NPs in water, in cell culture medium supplemented with fetal calf serum, and in cell culture medium preconditioned by HT29 and CaCo₂ cells were determined. Then, stress responses of the cells were evaluated following exposure to NS-USPIO NPs, OA-USPIO NPs, and free OA. No modification of the cytoskeletal actin network was observed. Cell response to stress, including markers of apoptosis and DNA repair, oxidative stress and degradative/autophagic stress, induction of heat shock protein, or lipid metabolism was determined in cells exposed to the two NPs. Induction of an autophagic response was observed in the two cell lines for both NPs but not free OA, while the other stress responses were cell- and NP-specific. The formation of lipid vacuoles/droplets was demonstrated in HT29 and CaCo₂ cells exposed to OA-USPIO NPs but not to NS-USPIO NPs, and to a much lower level in cells exposed to equimolar concentrations of free OA. Therefore, the induction of lipid vacuoles in colon cells exposed to OA utilized as a stabilizer for USPIO NPs is higly amplified compared to free OA, and is not observed in the absence of this lipid in NS-USPIO NPs.
Pubmed
Web of science
Open Access
Oui
Création de la notice
27/10/2014 11:17
Dernière modification de la notice
20/08/2019 16:09
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