Project description:We are investigating the mRNA expression profiles of human lung cells to gaseous urban mixtures We used microarrays to compare the global mRNA expression profiles upon response to fresh against aged urban mix Keywords: dose A549 cells were grown to confluency and exposed to fresh urban mix, aged urban mix, or mock-treated. RNA was collected 9 hrs after exposure.
Project description:We are investigating the mRNA expression profiles of human lung cells to gaseous urban mixtures We used microarrays to compare the global mRNA expression profiles upon response to fresh against aged urban mix Keywords: dose
Project description:2D (A549) and 3D (AIR-606) human lung epithelial cell cultures were mock treated or exposed to 100 ug/ml petroleum coke or urban air particulates (both in the PM10 range) for 16 h. Secretomes were compared for triplicate treatments for each group by isobaric tags and LC/MS/MS.
Project description:To investigate the toxicological mechanisms induced by an antrhopogenic SOAs (SOANAP-SP) and a biogenic SOAs (SOAβPIN-SP), as well as, fresh soot particles (SPs) in either the directly exposed A549 cells cultured at the air-liquid interphase or in the indirectly exposed EA.hy926 cells.
Project description:In this study, fathead minnow (FHM) embryos were exposed to two doses of fresh, aged and pure naphthenic acids mixtures until hatch. Larvae were scored for developmental deformities prior to preservation for gene expression analyses. 5 larvae were pooled per gene expression replicate.
Project description:This study compares the dose dependent transcriptome data obtained for the volatile compound dimethylamine, which has been exposed in an in vitro system via air-liquid-interface (ALI) exposure to a pulmonary cell line (A549 cells).
Project description:This study compares the dose dependent transcriptome data obtained for the volatile compound dimethylamine, which has been exposed in an in vitro system via air-liquid-interface (ALI) exposure to a pulmonary cell line (A549 cells).
Project description:This study compares the dose dependent transcriptome data obtained for the volatile compound dimethylamine, which has been exposed in an in vitro system via air-liquid-interface (ALI) exposure to a pulmonary cell line (A549 cells).
Project description:In the present study, we investigate pulmonary transcriptional responses in mice following exposure in situ to ambient air in a heavily polluted urban environment. Mature C57BL/CBA male mice were caged in sheds located in an urban area near two working steel mills and a major highway in Hamilton, Ontario, Canada. Control mice were housed in the same environment but received only high-efficiency particle-filtered air. Whole lung tissues were collected from mice exposed for 3 weeks, 10 weeks or for 10 weeks followed by 6 weeks in the laboratory (16 weeks total). DNA microarrays were used to explore changes in pulmonary gene expression in mice breathing ambient air versus HEPA-filtered air. Transcriptional profiling revealed changes in the expression of genes implicated in the lipid droplet synthesis pathway (plin, dgat2, lpl, s3-12, agpat2), antioxidants (ucp1). We postulate that exposure to particulate matter adsorbed with polycyclic aromatic hydrocarbons triggers lipid droplet synthesis (holding depots for lipids and malformed/excess proteins tagged for degradation) in the lungs, which act to sequester particulates adsorbed with toxic chemicals. Increased lipid droplet synthesis could potentially lead to endogenous/stressor-induced synthesis of reactive oxygen species and activation of antioxidant mechanisms. Further investigation into the stimulation of lipid droplet synthesis in the lung in response to air pollution is warranted in order to better understand these mechanistic changes and the resulting health implications. Mature male C57BL/6 x CBA F1 hybrid mice were exposed to either HEPA-filtered or ambient air in Hamilton, ON, Canada. Animals were exposed starting May 14, 2004 for 3 weeks (3wk), 10 weeks (10wk), or for 10 weeks followed by 6 weeks of recovery (16wk). Each treatment group consisted of five mice, for a total of 30 mice. Total RNA was isolated from a random section of the whole lung using TRIzol reagent (Invitrogen) and purified using the RNeasy Mini Kit (Qiagen). RNA quality was confirmed by UV spectrophotometry and using an Agilent Bioanalyzer. Total RNA (200 ng) from HEPA-filtered air or whole air-exposed mice and Universal Mouse Reference RNA (Stratagene) were used to synthesize double-stranded cDNA and cyanine-labelled cRNA according to the manufacturer's instructions (Agilent Linear Amplification Kits, Agilent Technologies). Biological samples were labelled with Cy5 dye while the commercially available Stratagene mouse reference RNA was labelled with Cy3 dye. At each of the three time points, ambient air-exposed samples and HEPA-filtered samples were hybridized to Agilent microarrays. Arrays were washed, and scanned on an Agilent G2505B scanner. Data were acquired using the Agilent Feature Extraction software version 9.5.3.1.
