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Gene expression profiles in rat lung following intratracheal instillation with cellulose nanofibrils and multi-walled carbon nanotubes

ABSTRACT: Gene expression profiles in rat lung following intratracheal instillation with cellulose nanofibrils and multi-walled carbon nanotubes

PROVIDER: PRJNA644821 | ENA |

REPOSITORIES: ENA

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Gene expression profiles in rat lung following intratracheal instillation with cellulose nanofibrils and multi-walled carbon nanotubes

Project description:To evaluate the biological effects at the transcriptional level of manufactured nanomaterials, whole genome microarray analysis of rat lungs intratracheally instilled with cellulose nanofibrils (CNFs) with different physicochemical properties or multi-walled carbon nanotubes (MWCNTs) were performed.

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Gene expression profiles in rat lung following intratracheal instillation with single-wall carbon nanotubes

Project description:Gene expression profiling of the rat lung following intratracheal instillation with single-wall carbon nanotubes (SWCNTs) was employed to gain insights into these molecular events. We attempted to characterize time-dependent changes in the gene expression until 754 days after intratracheal instillation with SWCNTs suspensions at 0.2 mg (L-SWCNT) and 0.4 mg (H-SWCNT) injected dose per rat, and to identify the shift from the acute-phase to the chronic-phase phase on the basis of evaluation at the molecular level.

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Gene expression profiles in rat lung following intratracheal instillation with single-wall carbon nanotubes (SWCNTs)

Project description:Gene expression profiling of the rat lung following intratracheal instillation with SWCNTs was employed to gain insights into these molecular events. We attempted to characterize time-dependent changes in the gene expression until 754 days after intratracheal instillation with SWCNTs suspensions at 0.2 mg (L-SWCNT) and 0.4 mg (H-SWCNT) injected dose per rat, and to identify the shift from the acute-phase to the chronic-phase phase on the basis of evaluation at the molecular level. Groups of nine-week-old male Wistar rats (n= 6 per group/ time point) were intratracheally instilled with single-wall carbon nanotubes (SWCNTs) suspended in 0.4 ml distilled water including 0.1% Triton X-100 as a single injection 0.1 mg (L-SWCNT) and 0.4 mg (H-SWCNT) SWCNTs/ rat). Control groups received 0.1% Triton X-100 (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 3 days, 7 days, 30 days, 90 days, 180 days, 365 days and 754 days post-instillation. Right lungs of anesthetized rats were perfused with physiological saline, excised, and used for DNA microarray analysis.

2013-09-07 | E-GEOD-50664 | biostudies-arrayexpress

Gene expression profiles in rat lung following intratracheal instillation with impurity-free single-wall carbon nanotubes

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.

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Project description:Adverse lung effects in rodents following pulmonary exposure to multi-walled carbon nanotubes (MWCNT) are well documented. However, systemic effects are less understood. Prospective epidemiological studies have shown increased cardiovascular disease risk after pulmonary exposure to airborne particles, which has led to concerns that inhalation exposure to MWCNT might pose similar risks. We used high-content genomics tools to compare hepatic responses after exposure to a short, entangled MWCNT to the hepatic responses after exposure to a long, stiffer MWCNT at the global transcriptomic level. Female C57BL/6 mice were exposed by single intratracheal instillation to 162 M-BM-5g/mouse of a short MWCNT (NRCWE-26 (NC-7000), 847M-BM-1102 nm in length) or long MWCNT (NM-401 (CP-0006-SG), 4048M-BM-1366 nm in length). Liver tissues were harvested 24 h, 3 d and 28 d after exposure. This experiment examined the pulmonary transcriptional response of female C57BL/6 mice exposed to NRCWE-26, a short multi-walled carbon nanotube, and NM-401, a long multi-walled carbon nanotube, at three doses: D1 (18 M-NM-<g), D2 (54 M-NM-<g), D3 (162 M-NM-<g), and vehicle control. Each dose group was examined 1, 3 or 28 days post-exposure. Each dose group had 6 biological replicates. There were a total of 72 samples included in the final analysis using a two-color reference design.

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