Dataset Information


BEAS2B cells and A549 cells: control versus nanoparticle exposure

ABSTRACT: Fragmentary knowledge exists on the adverse health effects of CoO- and CeO2-nanoparticles (NP)s. We analyzed toxicogenomic profiles of BEAS-2B versus A549 cells using genome-wide transcriptomics to identify molecules and cellular processes that are triggered by monodispersed noncytotoxic suspensions of 7-nm CoO- and 4-nm CeO2-NPs for 3, 6, 10, and 24 hours. We aimed to investigate 1) whether a cell type responds similarly to two different NPs exposure, 2) whether alveolar versus bronchial epithelial cells respond differently to the same NP, and 3) whether immune processes are influenced. The kinetics of the cell responses induced by the two NPs were different between the two lung epithelial cell models. Both CoO- and CeO2-NP exposure induced mainly downregulation of gene transcription. BEAS-2B cells were found to be more sensitive towards NP exposure, as they showed a higher total number of differentially expressed transcripts (DET) at a 10-fold lower NP-concentration than A549 cells. Hierarchical clustering of all DET indicated that the transcriptional responses were quite heterogeneous among the two cell types and two NPs. Between 1% and 14% DET encoding markers involved in immune system processes were observed in the BEAS-2B and A549 cell lines, with the highest fractions observed in BEAS-2B cells. Most of these genes, i.e. ITGB2, TLR6, PAG1, HLA-DRB3, TIRAP, and HLA-A, are involved in immune signalling. The AKT1 gene, which showed persistently decreased expression levels, was identified as a possible generic marker of lung epithelial cell-NP interaction. Our data suggest that CoO- and CeO2-NPs give rise to distinct responses. Overall design: Replicates: 3 biological replicates; Exposure: 2 different cell types, 2 different nanoparticles versus solvent, 1 exposure concentration; Exposure time: 4 different exposure time points;

INSTRUMENT(S): Agilent-014850 Whole Human Genome Microarray 4x44K G4112F (Feature Number version)

SUBMITTER: Sylvie Remy  

PROVIDER: GSE45763 | GEO | 2014-12-01



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Gene expression profiles reveal distinct immunological responses of cobalt and cerium dioxide nanoparticles in two in vitro lung epithelial cell models.

Verstraelen Sandra S   Remy Sylvie S   Casals Eudald E   De Boever Patrick P   Witters Hilda H   Gatti Antonietta A   Puntes Victor V   Nelissen Inge I  

Toxicology letters 20140510 3

Fragmentary knowledge exists on cellular signaling responses underlying possible adverse health effects of CoO- and CeO2-nanoparticles (NP)s after inhalation. We aimed to perform a time kinetic study of gene expression profiles induced by these NPs in alveolar A549 and bronchial BEAS-2B epithelial cells, and investigated possible immune system modulation. The kinetics of the cell responses induced by the NPs were different between the lung epithelial models. Both CoO- and CeO2-NP exposure induce  ...[more]

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