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- W2143186178 abstract "Prostate-specific antigen (PSA) is the most useful tumor marker for diagnosis and monitoring of prostate cancer (CaP). Recently, we developed a specific immunoassay for human kallikrein 11 (hK11), one of the kallikrein gene family members, and found that hK11 was highly expressed in prostatic tissue and could be detected in seminal plasma (E. P. Diamandis et al., Cancer Res., 62: 295-300, 2002). The aim of this study was to investigate whether serum hK11 levels could be used to discriminate CaP from benign prostatic hyperplasia (BPH). We analyzed for hK11, total PSA, and percentage of free PSA, 150 serum samples from men with histologically confirmed BPH (n = 64) or CaP (n = 86). Total and free PSA levels were measured by the Immulite PSA assay, and hK11 levels were measured by our previously published immunofluorometric assay. Serum hK11 levels and the hK11:total PSA ratio were both significantly lower in CaP patients than in BPH patients. In the subgroup of patients with percentage of free PSA less than 20, an additional 54% of BPH patients could have avoided biopsies by using the hK11:total PSA ratio. Receiver operating characteristic (ROC) curve analysis demonstrated that the hK11:total PSA ratio [area under the curve (AUC), 0.83] and percentage of free PSA (AUC, 0.83) were much stronger predictors of CaP than total PSA (AUC, 0.69). These preliminary data suggest that the hK11:total PSA ratio could be a useful tumor marker for CaP and could be combined with percentage of PSA to further reduce the number of unnecessary prostatic biopsies." @default.
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- W2143186178 date "2003-10-01" @default.
- W2143186178 modified "2023-09-23" @default.
- W2143186178 title "The usefulness of serum human kallikrein 11 for discriminating between prostate cancer and benign prostatic hyperplasia." @default.
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