دورية أكاديمية
Toxicity evaluation of manufactured CeO$_2$ nanoparticles before and after alteration: combined physicochemical and whole-genome expression analysis in Caco-2 cells
| العنوان: | Toxicity evaluation of manufactured CeO$_2$ nanoparticles before and after alteration: combined physicochemical and whole-genome expression analysis in Caco-2 cells |
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| المؤلفون: | Fisichella, Matthieu, Berenguer, Frederic, Steinmetz, Gerard, Auffan, Melanie, Rose, Jérôme, Prat, Odette |
| المساهمون: | Laboratoire de Neurobiologie, Université d'Orléans (UO), Service de Biochimie et Toxicologie Nucléaire (SBTN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), International Consortium for the Environmental Implications of Nanotechnology iCEINT, Europôle de l'Arbois, 13545 Aix en Provence, ANR-08-CESA-0001,AgingNano&Troph,Impact environnemental des résidus de dégradation des nanomatériaux (RDNs) commercialisés: devenir, biotransformation et toxicité vis à vis d'organismes cibles d'un milieu aquatique(2008) |
| المصدر: | ISSN: 1471-2164 ; BMC Genomics ; https://hal.science/hal-01426112Test ; BMC Genomics, 2014, 15, pp.700. ⟨10.1186/1471-2164-15-700⟩ ; https://bmcgenomics.biomedcentral.com/articles/10.1186/1471-2164-15-700Test. |
| بيانات النشر: | HAL CCSD BioMed Central |
| سنة النشر: | 2014 |
| المجموعة: | Aix-Marseille Université: HAL |
| مصطلحات موضوعية: | Engineered nanomaterials, Nanoparticles, Transcriptome, Toxicogenomics, Life cycle, [SDE]Environmental Sciences |
| الوصف: | International audience ; Background: Engineered nanomaterials may release nanosized residues, by degradation, throughout their life cycle. These residues may be a threat for living organisms. They may be ingested by humans through food and water. Although the toxicity of pristine CeO2 nanoparticles (NPs) has been documented, there is a lack of studies on manufactured nanoparticles, which are often surface modified. Here, we investigated the potential adverse effects of CeO2 Nanobyk 3810 (TM) NPs, used in wood care, and their residues, altered by light or acid. Results: Human intestinal Caco-2 cells were exposed to residues degraded by daylight or in a medium simulating gastric acidity. Size and zeta potential were determined by dynamic light scattering. The surface structure and redox state of cerium were analyzed by transmission electronic microscopy (TEM) and X-ray absorption spectroscopy, respectively. Viability tests were performed in Caco-2 cells exposed to NPs. Cell morphology was imaged with scanning electronic microscopy. Gene expression profiles obtained from cells exposed to NPs before and after their alteration were compared, to highlight differences in cellular functions. No change in the cerium redox state was observed for altered NPs. All CeO2 NPs suspended in the culture medium became microsized. Cytotoxicity tests showed no toxicity after Caco-2 cell exposure to these various NPs up to 170 mu g/mL (24 h and 72 h). Nevertheless, a more-sensitive whole-gene-expression study, based on a pathway-driven analysis, highlighted a modification of metabolic activity, especially mitochondrial function, by altered Nanobyk 3810 (TM). The down-regulation of key genes of this pathway was validated by qRT-PCR. Conversely, Nanobyk 3810 (TM) coated with ammonium citrate did not display any adverse effect at the same concentration. Conclusion: The degraded nanoparticles were more toxic than their coated counterparts. Desorption of the outside layer was the most likely cause of this discrepancy in toxicity. It can ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | hal-01426112; https://hal.science/hal-01426112Test; https://hal.science/hal-01426112/documentTest; https://hal.science/hal-01426112/file/12864_2014_Article_6383.pdfTest; PUBMEDCENTRAL: PMC4150968 |
| DOI: | 10.1186/1471-2164-15-700 |
| الإتاحة: | https://doi.org/10.1186/1471-2164-15-700Test https://hal.science/hal-01426112Test https://hal.science/hal-01426112/documentTest https://hal.science/hal-01426112/file/12864_2014_Article_6383.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.12010F0B |
| قاعدة البيانات: | BASE |
| DOI: | 10.1186/1471-2164-15-700 |
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