title: Shotgun proteomic analysis of human-induced sputum.
abstract: Induced sputum is a readily accessible biological fluid whose composition may alter as a consequence of disease. To date, however, the proteins that routinely populate this biofluid are largely unknown, in part due to the technical difficulties in processing such mucin-rich samples. To provide a catalogue of sputum proteins, we have surveyed the proteome of human-induced sputum (sputome). A combination of 2-D gel analysis and GeLC-MS/MS allowed a total of 191 human proteins to be confidently assigned. In addition to the expected components, several hitherto unreported proteins were found to be present, including three members of the annexin family, kallikreins 1 and 11, and peroxiredoxins 1, 2 and 5. Other sets of proteins identified included four proteins previously annotated as hypothetical or conserved hypothetical. Taken together, these data represent the first extensive survey of the proteome of induced sputum and provide a platform for future identification of biomarkers of lung disease.
authors.affiliation: Division of Infection, Inflammation and Repair, School of Medicine, Southampton General Hospital, Southampton, UK.
authors.forename: Ben
authors.initials: B
authors.lastname: Nicholas
authors.forename: Paul
authors.initials: P
authors.lastname: Skipp
authors.forename: Richard
authors.initials: R
authors.lastname: Mould
authors.forename: Stephen
authors.initials: S
authors.lastname: Rennard
authors.forename: Donna E
authors.initials: DE
authors.lastname: Davies
authors.forename: C David
authors.initials: CD
authors.lastname: O'Connor
authors.forename: Ratko
authors.initials: R
authors.lastname: Djukanović
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods; D015180:Electrophoresis, Gel, Two-Dimensional / Q000379:methods; D005260:Female; D006801:Humans; D013058:Mass Spectrometry; D008875:Middle Aged; D040901:Proteomics / Q000379:methods*; D012463:Saliva / Q000737:chemistry / Q000378:metabolism; D012471:Salivary Proteins and Peptides / Q000032:analysis*; D013183:Sputum / Q000737:chemistry / Q000378:metabolism*
chemical_list: D012471:Salivary Proteins and Peptides