title: A highly sensitive enzyme-linked immunoassay for serum free prostate specific antigen (f-PSA).
abstract: Monoclonal antibodies (MAbs) were generated against human prostate specific antigen (PSA) to allow development of a sensitive free-PSA (f-PSA) assay. Of a total of 211, 12 could detect only f-PSA, the other 199 MAbs binding to both f-PSA and complex-PSA. In the present study, one MAb (no. 5C6) specific for f-PSA and another (no. 79) reacting with both forms were used to develop an enzyme-linked immunoassay (ELISA) for serum f-PSA. The detection limit was established as 0.008 microg/l (n = 20, mean of zero standard + 3 S.D.) and the average recovery of f-PSA was 93-102%. The within-run and between-day coefficient of variation (CV) varied from 5.4-7.4% and 4.8-6.5%, respectively. The cross-reactivity of the assay to PSA-alpha1-antichymotrypsin complex was determined to be < 0.4%.
authors.affiliation: Second Department of Pathology, Nara Medical University, Kashihara, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsumoto
authors.forename: N
authors.initials: N
authors.lastname: Konishi
authors.forename: Y
authors.initials: Y
authors.lastname: Hiasa
authors.forename: E
authors.initials: E
authors.lastname: Kimura
authors.forename: Y
authors.initials: Y
authors.lastname: Takahashi
authors.forename: K
authors.initials: K
authors.lastname: Shinohara
authors.forename: T
authors.initials: T
authors.lastname: Samori
mesh_terms: D000818:Animals; D000918:Antibody Specificity; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay / Q000592:standards*; D006801:Humans; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D017430:Prostate-Specific Antigen / Q000097:blood* / Q000276:immunology; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D017430:Prostate-Specific Antigen