title: Proteomic identification of the differentially expressed proteins in human lung epithelial cells by airborne particulate matter.
abstract: Exposure to airborne PM₁₀, particulate matter with a median aerodynamic diameter of less than 10 µm, is known to be associated with a number of adverse health effects. To gain a better understanding of the cytotoxic mechanism and to develop protein biomarker candidates for PM₁₀-induced toxicity, proteomic analyses were performed in human lung epithelial cells. Two-dimensional gel electrophoresis (2-DE) was followed by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS) to analyze the proteins differentially expressed by exposure to PM₁₀. Analysis of 2-DE gels revealed more than 1270 protein spots in the cells, of which 36 showed changes of more than 2-fold on exposure to PM₁₀ (up-regulation, n = 6; down-regulation, n = 30). The glycolytic enzyme pyruvate kinase, which also plays a role in tumor metabolism, showed a marked increase in expression, whereas the cytoskeleton-related vinculin and anti-inflammatory annexin 1 showed marked decreases in expression.
authors.affiliation: Department of Medical Biotechnology, SoonChunHyang University, Asan, Chungnam 336-600, Republic of Korea.
authors.forename: Yu Mi
authors.initials: YM
authors.lastname: Jeon
authors.forename: Bu Soon
authors.initials: BS
authors.lastname: Son
authors.forename: Mi Young
authors.initials: MY
authors.lastname: Lee
mesh_terms: D015415:Biomarkers; D002460:Cell Line; D015536:Down-Regulation; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods; D004847:Epithelial Cells / Q000378:metabolism*; D006801:Humans; D008168:Lung / Q000378:metabolism*; D013058:Mass Spectrometry; D052638:Particulate Matter / Q000633:toxicity*; D011506:Proteins / Q000032:analysis* / Q000737:chemistry; D040901:Proteomics / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D015854:Up-Regulation
chemical_list: D015415:Biomarkers; D052638:Particulate Matter; D011506:Proteins