Project description:To identify differentially expressed genes and key biological pathways that define toxicity following nanomaterial exposure, we performed microarray analyses on NR8383 macrophages exposed for 4 h to 1 cm²/cm² of multi-walled carbon nanotubes (NRCWE006 - Mitsui-7). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement N°. 686098
Project description:To identify differentially expressed genes and key biological pathways that define toxicity following nanomaterial exposure, we performed microarray analyses on NR8383 macrophages exposed for 4 h to 0.17 µg/mL of multi-walled carbon nanotubes (NM401) (100 % cell viability). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No. 686098
Project description:To identify differentially expressed genes and key biological pathways that define toxicity following nanomaterial exposure, we performed microarray analyses on NR8383 macrophages exposed for 4 h to 11 cm²/cm² of pristine single-walled carbon nanotubes (NRCWE055). This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement N°. 686098
Project description:The microarray investigations were part of a toxicological investigation of the effect of exposure to single-walled carbon nanotubes (SWCNTs) to macrophages and non-phagocytotic cells The results of this study are accepted for publication in Toxicological Research with the title: The toxic effects of single-wall carbon nanotubes are linked to the phagocytic ability of cells
Project description:The microarray investigations were part of a toxicological investigation of the effect of exposure to single-walled carbon nanotubes (SWCNTs) to macrophages and non-phagocytotic cells The results of this study are accepted for publication in Toxicological Research with the title: The toxic effects of single-wall carbon nanotubes are linked to the phagocytic ability of cells Cell lines were treated for 24 hours either with water (vehicle control) or SWCNTs for 24 hours and the toxic effects were investigated including gene expression changes by affymetrix microarrays.
Project description:As the application of carbon nanotubes (CNT) in consumer products continues to rise, studies have expanded to determine the associated risks of exposure on human and environmental health. In particular, several lines of evidence indicate that exposure to multi-walled carbon nanotubes (MWCNT) could pose a carcinogenic risk similar to asbestos fibers. However, to date the potential markers of MWCNT exposure are not yet explored in humans.
Project description:To evaluate the biological effects at the transcriptional level of manufactured nanomaterials, we performed whole genome microarrays of rat alveolar macrophages (NR8383) exposed to multi-walled carbon nanotubes (MWCNTs) with different physicochemical properties.
Project description:Recent in vivo studies reported that inhaled carbon nanotube distribute in the alveolar region resulting in an acute inflammation, progressive fibrotic response and particle accumulation at the bronchoalveolar junction with low clearance. With similar biopersistence and shape as asbestos, a known lung carcinogen, growing concern has arisen for elevated risk of carbon nanotube-induced lung carcinogenesis; however few studies have evaluated long-term human health risks associated with chronic pulmonary carbon nanotube exposures compared to asbestos. To address this knowledge gap, we conducted subchronic in vitro exposures of dispersed single walled carbon nanotube, multi-walled carbon nanotube and crocidolite asbestos to human small airway epithelial cells to assess their neoplastic transformation potential. Subchronic single-, multi-walled carbon nanotube and asbestos exposures caused human lung cell neoplastic transformation exhibited by increased proliferation, anchorage-independent growth, invasion and angiogenesis. Whole genome profiling and protein expression analyses showed that carbon nanotube-induced transformation mechanism(s) was largely different from asbestos-related inflammatory signaling, suggesting specific carbon nanotube-induced carcinogenic potential. This study provides novel carbon nanotube and asbestos toxicogenomic information for risk assessment and an in vitro model to evaluate transformation potential of carbon nanotubes and other nanoparticles.
