title: Protein expression in sputum of smokers and chronic obstructive pulmonary disease patients: a pilot study by CapLC-ESI-Q-TOF.
abstract: The current report describes the use of CapLC-ESI-Q/TOF-MS for investigating the proteome profiles of hypertonic saline-induced sputum samples from 56 smokers. The severity of their lung disease ranged from normal (healthy smokers) to chronic bronchitis, chronic obstructive pulmonary disease (COPD), and COPD with emphysema. This pilot study examined the hypothesis that there were distinct differences in protein expression profiles that were related to the phenotype and cigarette smoking illness severity. A total of 203 unique proteins were identified. These may represent the most highly expressed proteins in induced sputum. Our results provide evidence that different proteins are expressed, as the disease progresses from health to more advanced stages, and support our contention that a proteomic approach would be beneficial in discovering selective molecules linked to specific COPD stages.
authors.affiliation: Dipartimento di Biochimica A. Castellani, Universita' di Pavia, Italy. casado@imsb.biol.ethz.ch
authors.forename: Begoña
authors.initials: B
authors.lastname: Casado
authors.forename: Paolo
authors.initials: P
authors.lastname: Iadarola
authors.forename: Lewis K
authors.initials: LK
authors.lastname: Pannell
authors.forename: Maurizio
authors.initials: M
authors.lastname: Luisetti
authors.forename: Angelo
authors.initials: A
authors.lastname: Corsico
authors.forename: Elena
authors.initials: E
authors.lastname: Ansaldo
authors.forename: Ilaria
authors.initials: I
authors.lastname: Ferrarotti
authors.forename: Piera
authors.initials: P
authors.lastname: Boschetto
authors.forename: James N
authors.initials: JN
authors.lastname: Baraniuk
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000595:Amino Acid Sequence; D015415:Biomarkers / Q000737:chemistry / Q000378:metabolism; D002853:Chromatography, Liquid; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008969:Molecular Sequence Data; D010865:Pilot Projects; D011506:Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D029424:Pulmonary Disease, Chronic Obstructive / Q000378:metabolism*; D012907:Smoking / Q000378:metabolism*; D021241:Spectrometry, Mass, Electrospray Ionization; D013183:Sputum / Q000737:chemistry* / Q000378:metabolism*
chemical_list: D015415:Biomarkers; D011506:Proteins