Project description:Peripheral blood samples were collected before (0 hour) and at 24 hours after exposure from healthy subjects who participated in previous controlled exposures to ultrafine carbon particles (UFP, 50 microg/m3) or filtered air (FA)(n = 3 each). The exposure time was 2 hours. RNA from mononuclear cell fraction (>85% lymphocytes) was extracted, amplified and hybridized to Affymetrix HU133 plus 2 microarrays. We used microarray to explore significantly altered genes after ultrafine carbon particle exposure. Each subject was exposed to filtered air or ultrafine carbon particles. Two peripheral blood samples (pre- and post-exposure) were taken. Mononuclear cells were isolated for gene expression analysis.
Project description:Peripheral blood samples were collected before (0 hour) and at 24 hours after exposure from healthy subjects who participated in previous controlled exposures to ultrafine carbon particles (UFP, 50 microg/m3) or filtered air (FA)(n = 3 each). The exposure time was 2 hours. RNA from mononuclear cell fraction (>85% lymphocytes) was extracted, amplified and hybridized to Affymetrix HU133 plus 2 microarrays. We used microarray to explore significantly altered genes after ultrafine carbon particle exposure.
Project description:To gain insight into the promoting effect of ultrafine particle inhalation on development and progression of allergic asthma, we selected an experimental approach involving exposure to ultrafine carbon particles (UCP) and gene expression profiling of lungs from mice with experimental, ovalbumin induced allergy. Comparative gene expression analysis was performed by hybridizing pooled cDNA samples from lavaged lungs of different groups. The results suggest that allergic sensitization may represent an susceptibility factor for effects of UCP on gene expression in the lung. In sensitized individuals UCP exposure, such as found in polluted air, thus may contribute to the development and/or aggrevation of allergic asthma. Keywords: Particle Inhalation, lung, ovalbumin sensitized and challanged, expression profling
Project description:To gain insight into the promoting effect of ultrafine particle inhalation on development and progression of allergic asthma, we selected an experimental approach involving exposure to ultrafine carbon particles (UCP) and gene expression profiling of lungs from mice with experimental, ovalbumin induced allergy. Comparative gene expression analysis was performed by hybridizing pooled cDNA samples from lavaged lungs of different groups. These results suggest that allergic sensitization may represent a susceptibility factor for effects of UCP on gene expression in the lung. In sensitized individuals UCP exposure, such as found in polluted air, thus may contribute to the development and /or aggravation of allergic asthma. Keywords: Particle Inhalation, lung, ovalbumin sensitzed and challanged, experssion profiling
Project description:Gene expression profiling of the human keratinocytes cell line (HaCaT) exposure to ultrafine, fine, and submicron TiO2 particles were employed to gain insights into the molecular events.
Project description:The purpose of this study was to characterize global gene expression in human airway epithelial cells and identify cellular pathways associated with coarse, fine and ultrafine particulate matter (PM) exposures. Ambient PM was collected in 3 different size fractions from Chapel Hill air, particles were extracted from foam or filter matrices and lyophilized. Human primary airway epithelial cells were exposed to particles at 250μg/ml or vehicle control for 6h in culture. Following exposure, RNA was isolated and hybridized to human HG U133A affymetrix chips. Experiment Overall Design: Human primary epithelial cells were exposed to coarse, fine, ultrafine PM or vehicle control in culture for 6h. Three biological replicates for each treatment (coarse, fine, ultrafine, control) were conducted at (250ug/ml). 12 Affymetrix chips (HG U133A) were used.
Project description:Gene expression profiling of the rat lung after whole-body inhalation exposure to C60 fullerene and ultrafine nickel oxide (Uf-NiO) particles as a positive control were employed to gain insights into these molecular events.
Project description:To gain insight into the promoting effect of ultrafine particle inhalation on development and progression of allergic asthma, we selected an experimental approach involving exposure to ultrafine carbon particles (UCP) and gene expression profiling of lungs from mice with experimental, ovalbumin induced allergy. Comparative gene expression analysis was performed by hybridizing pooled cDNA samples from lavaged lungs of different groups. The results suggest that allergic sensitization may represent an susceptibility factor for effects of UCP on gene expression in the lung. In sensitized individuals UCP exposure, such as found in polluted air, thus may contribute to the development and/or aggrevation of allergic asthma. Keywords: Particle Inhalation, lung, ovalbumin sensitized and challanged, expression profling Lungs of groups of six sensitized or sensitized and challanged BALB/cJ mice, either subjected to particle-free or UCP containing air; two replicates including one dye swap experiment have been performed for lungs: a) sensitized particle free air versus sensitized UCP exposure; b) sensitized and challanged particle free air versus sensitized and challanged UCP exposure