title: Proteomic analysis of lung tissue of rats exposed to cigarette smoke and radon.
abstract: This study examined the protein expression in lung tissues of rats exposed to radon and cigarette smoke using a proteomic approach. Male Wistar rats were exposed daily to radon at a concentration of 100,000 Bq/m(3) for 16 h, and then exposed to 20% cigarette smoke for 1 h for a period of 75 d, with the radon cumulative dose reaching 200 WLM (working level months). Proteins from rat lung tissue were separated by two-dimensional gel electrophoresis (2-DE), stained with Coomassie blue, and analyzed with ImageMaster two-dimensional (2D) platinum software. Differentially expressed proteins were analyzed by matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MALDI-time of flight [TOF] MS or MALDI TOF/TOF-MS). Twenty prominent proteins that were correlated with signal transduction, metabolism, heat shock and stress, and cytoskeleton construction were identified. Some of the differential expression proteins were verified by Western blot analysis and immunohistochemical staining, and the results were consistent with 2-DE analysis. The identified proteins and peptides might be potential diagnostic markers of lung impairment induced by radon and cigarette smoke exposure.
authors.affiliation: Department of Pharmacy, Soochow University, Suzhou, China.
authors.forename: Nai-Yu
authors.initials: NY
authors.lastname: Xu
authors.forename: Su-Ping
authors.initials: SP
authors.lastname: Zhang
authors.forename: Liang
authors.initials: L
authors.lastname: Dong
authors.forename: Ji-Hua
authors.initials: JH
authors.lastname: Nie
authors.forename: Jian
authors.initials: J
authors.lastname: Tong
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000032:analysis; D003599:Cytoskeleton / Q000187:drug effects / Q000528:radiation effects; D015536:Down-Regulation; D015180:Electrophoresis, Gel, Two-Dimensional; D005786:Gene Expression Regulation; D008168:Lung / Q000187:drug effects* / Q000473:pathology / Q000528:radiation effects*; D008297:Male; D018384:Oxidative Stress / Q000187:drug effects / Q000528:radiation effects; D040901:Proteomics; D011886:Radon / Q000009:adverse effects*; D051381:Rats; D017208:Rats, Wistar; D015398:Signal Transduction / Q000187:drug effects / Q000528:radiation effects; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014028:Tobacco Smoke Pollution / Q000009:adverse effects*; D015854:Up-Regulation
chemical_list: D015415:Biomarkers; D014028:Tobacco Smoke Pollution; D011886:Radon