Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the transcriptional level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physicochemical properties of single-wall carbon nanotubes (SWCNTs). Two kinds of the impurity-free singlewall carbon nanotubes (SWCNTs), CNT-1 or CNT-2 induced gene expression in rat alveolar macrophages were measured at 24 hours exposure to doses of 0.1mg/mL. The experiments were performed using control for each experiment (n=4).
Project description:Gene expression profiling of the rat alveolar macrophages (NR8383) and human alveolar epithelial cell line (A549) exposure to iron-enriched pristine single-wall carbon nanotubes (SWCNTs) or their purified SWCNTs were employed to gain insights at the transcriptional level.
Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the molecular level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physico-chemical properties of impurity-free single-wall carbon nanotubes (SWCNTs).
Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the transcriptional level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physicochemical properties of impurity-free single-wall carbon nanotubes (SWCNTs), namely, relatively small bundles and a short linear shape (CNT-1) and large bundles and a long linear shape (CNT-2).
Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the molecular level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physico-chemical properties of single-wall carbon nanotubes (SWCNTs). Three kinds of single-wall carbon nanotubes (SWCNTs), CNT-1, CNT-2 or CNT-3 induced gene expression in human alveolar epithelial cell lines were measured at 24 and 48 hours exposure to doses of 90.8μg/mL (CNT-1), 109.0μg/mL (CNT-2), and 77.0μg/mL (CNT-2). Three independent experiments were performed at each time (24 or 48 hours) using different untreated control for each experiment (n=4).
Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the transcriptional level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physicochemical properties of impurity-free single-wall carbon nanotubes (SWCNTs). We have prepared two types of dispersed the SWCNTs, namely relatively small bundles and a short linear shape (CNT-1) and large bundles and a long linear shape (CNT-2), and attempted to characterize time-dependent changes in the gene expression of lung tissues until 90 days after intratracheal instillation with SWCNTs suspensions at 0.4 mg injected dose per rat.
Project description:To further development of our gene expression approach to assess the effects of manufactured nanomaterials at the transcriptional level, we have employed whole genome microarray expression profiling as a discovery platform to identify genes with the potential to distinguish characterization of physicochemical properties of impurity-free single-wall carbon nanotubes (SWCNTs). We have prepared two types of dispersed the SWCNTs, namely relatively small bundles and a short linear shape (CNT-1) and large bundles and a long linear shape (CNT-2), and attempted to characterize time-dependent changes in the gene expression of lung tissues until 90 days after intratracheal instillation with SWCNTs suspensions at 0.4 mg injected dose per rat. Groups of nine-week-old male Wistar rats (n= 4 per group/ time point) were intratracheally instilled with single-wall carbon nanotubes (SWCNTs) suspended in 0.4 ml of 1.0mg/mL bovine serum albumin (BSA) as a single injection 0.4 mg SWCNTs/ rat. Control groups received 1.0mg/mL BSA (vehicle control). After intratracheal instillation treatment, rats were housed within polycarbonate cages at a controlled temperature of 22 M-BM-0C with a chow diet ad libitum, and dissected at 1day, 3 days, 7 days, 30 days, and 90 days post-instillation. Right lungs of anesthetized rats were perfused with physiological saline, excised, and used for DNA microarray analysis.
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
