title: ras oncoproteins in human plasma from lung cancer patients and healthy controls.
abstract: In order to explore the significance of ras oncoproteins in plasma in the carcinogenic process, we have examined samples from 40 Polish human lung cancer patients prior to treatment. They were compared with 35 healthy donors and have been screened using a direct analysis of the plasma. Proteins were separated by gel electrophoresis, transferred to a nitrocellulose membrane by Western blotting and detected by chemiluminescence, using monoclonal ras antibody as the primary antibody. Elevated increases in ras oncoproteins were determined where an increase was considered to be greater than 2 standard deviations above the mean negative control values. The results showed that in 45% of cancer patients ras oncoprotein levels were statistically significantly increased (P < 0.001, pooled two-sample t-test untransformed, and non-parametric Mann-Whitney test) in the plasma by comparison with 6% in the controls. This would suggest that an increase in ras oncoproteins in plasma could be a possible prognostic marker or biomarker for lung cancer.
authors.affiliation: BIBRA International, Carshalton Surrey, UK.
authors.forename: D
authors.initials: D
authors.lastname: Anderson
authors.forename: J A
authors.initials: JA
authors.lastname: Hughes
authors.forename: A
authors.initials: A
authors.lastname: Cebulska-Wasilewska
authors.forename: E
authors.initials: E
authors.lastname: Nizankowska
authors.forename: B
authors.initials: B
authors.lastname: Graca
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000097:blood*; D008297:Male; D008875:Middle Aged; D018631:ras Proteins / Q000097:blood*
chemical_list: D014408:Biomarkers, Tumor; D018631:ras Proteins