title: Elevated expression levels of the 14-3-3 family of proteins in lung cancer tissues.
abstract: Immunochemical staining of lung cancer sections with a murine monoclonal anti-14-3-3 antibody showed a sharp discrimination of the cancer tissue from neighboring normal counterparts in 88 of 121 primary lung cancer tissue specimens of all four major lung cancer histologies; specifically, 32 of 48 adenocarcinomas, 36 of 44 squamous cell carcinomas, 10 of 13 large cell carcinomas, and 10 of 16 small cell carcinomas, respectively, were stained positively. Sets of the 10,000 x g supernatants of normal and cancerous lung tissue homogenates, each set prepared from surgically dissected tissues of the cancer and its surrounding normal part, were assayed for 14-3-3 proteins by the sandwich enzyme-linked immunosorbent assay using two different monoclonal antibodies to 14-3-3 proteins. The results of the assay demonstrated 7.2 times higher 14-3-3 protein content in the lung cancer tissue (378 +/- 200 ng ml-1) as compared with the normal lung (54 +/- 35 ng ml-1). These results indicate that the 14-3-3 family of proteins can be an effective marker for lung cancer diagnosis such as sputum cytodiagnosis and that 14-3-3 proteins might be involved in the development of lung cancers.
authors.affiliation: Second Department of Surgery, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakanishi
authors.forename: S
authors.initials: S
authors.lastname: Hashizume
authors.forename: M
authors.initials: M
authors.lastname: Kato
authors.forename: T
authors.initials: T
authors.lastname: Honjoh
authors.forename: Y
authors.initials: Y
authors.lastname: Setoguchi
authors.forename: K
authors.initials: K
authors.lastname: Yasumoto
mesh_terms: D048948:14-3-3 Proteins; D000230:Adenocarcinoma / Q000378:metabolism; D000818:Animals; D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor; D018287:Carcinoma, Large Cell / Q000378:metabolism; D018288:Carcinoma, Small Cell / Q000378:metabolism; D002294:Carcinoma, Squamous Cell / Q000378:metabolism; D002417:Cattle; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D007150:Immunohistochemistry; D008175:Lung Neoplasms / Q000175:diagnosis / Q000378:metabolism*; D051379:Mice; D011506:Proteins / Q000276:immunology / Q000378:metabolism*; D014446:Tyrosine 3-Monooxygenase
chemical_list: D048948:14-3-3 Proteins; D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor; D011506:Proteins; D014446:Tyrosine 3-Monooxygenase