Lung response to multi-walled carbon nanotube exposure in rats.
Ontology highlight
ABSTRACT: The projected increase in the production and use of nanomaterials is expected to result in a corresponding increase in human exposure, potentially resulting in significant morbidity and mortality. Currently, the lung toxicity of multi-walled carbon nanotubes (MWCNT), a prototype nanomaterial, was investigated in a rat model. The rats were exposed by whole-body inhalation to air (controls) or MWCNT (6 hours/day, 3 days) to result in cumulative doses of 180, 90, 45, 22.5, or 11.25 mg/m3. Lung toxicity and gene expression profiles were determined in the lungs of the control and MWCNT exposed rats one day following termination of the exposures. Moderate lung histological changes, indicative of toxicity, were detected in rats exposed to MWCNT at doses > 45 mg/m3. Changes in toxicity parameters including, lactate dehydrogenase (LDH) activity, oxidant production, cell counts of phagocytes, and cytokine levels were detected in the bronchoalveolar lavage of rats exposed to > 22.5 mg/m3 MWCNT, compared with the air controls. Lung gene expression profiling detected differences in transcript levels (fold change >1.5 and FDR p<0.05) of several genes in the rats exposed to >22.5 mg/m3 MWCNT, compared with the controls. The changes in lung toxicity and gene expression profiles exhibited a dose-response to the MWCNT administered in the rats.
ORGANISM(S): Rattus norvegicus
PROVIDER: GSE148869 | GEO | 2022/12/31
REPOSITORIES: GEO
ACCESS DATA