title: The pyruvate kinase isoenzyme tumor M2 (Tu M2-PK) as a tumor marker for renal carcinoma.
abstract: Various isoforms of the glycolytic enzyme pyruvate kinase are expressed in different cell-types. One of these isoforms, the type Tu M2-PK, is strongly overexpressed by tumor cells and released into body fluids. The concentration of Tu M2-PK in body fluids can be quantitatively determined by a commercially available enzyme-linked immunosorbent assay (ELISA)-kit. Using this kit, the Tu M2-PK concentration was measured in EDTA-plasma of 64 patients with renal carcinoma and 10 patients suffering from nephritis. The ranges of the Tu M2-PK-concentrations of the two groups did not overlap, indicating a highly significant discrimination of renal carcinoma and benign renal diseases. Furthermore, the Tu M2-PK-concentration in EDTA-plasma correlates strongly with the Robson tumor stage of the 64 patients. The present results indicate that the Tu M2-PK might be the first tumor marker which could be an excellent complementation of the diagnostic program for renal carcinoma.
authors.affiliation: Klinikum der Johann-Wolfgang Goethe-Universität Frankfurt, Germany.
authors.forename: G M
authors.initials: GM
authors.lastname: Oremek
authors.forename: S
authors.initials: S
authors.lastname: Teigelkamp
authors.forename: W
authors.initials: W
authors.lastname: Kramer
authors.forename: E
authors.initials: E
authors.lastname: Eigenbrodt
authors.forename: K H
authors.initials: KH
authors.lastname: Usadel
mesh_terms: D014408:Biomarkers, Tumor / Q000097:blood*; D002292:Carcinoma, Renal Cell / Q000097:blood / Q000175:diagnosis* / Q000201:enzymology / Q000473:pathology; D003937:Diagnosis, Differential; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods; D006801:Humans; D007527:Isoenzymes / Q000097:blood; D007680:Kidney Neoplasms / Q000097:blood / Q000175:diagnosis* / Q000201:enzymology / Q000473:pathology; D009367:Neoplasm Staging; D009393:Nephritis / Q000097:blood / Q000201:enzymology; D011770:Pyruvate Kinase / Q000097:blood*; D011933:Reagent Kits, Diagnostic; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D014408:Biomarkers, Tumor; D007527:Isoenzymes; D011933:Reagent Kits, Diagnostic; D011770:Pyruvate Kinase