The value of (−7, −5)pro-prostate-specific antigen and human kallikrein-2 as serum markers for grading prostate cancer

2004 ◽  
Vol 93 (6) ◽  
pp. 720-724 ◽  
Author(s):  
C.H. Bangma ◽  
M.F. Wildhagen ◽  
G. Yurdakul ◽  
F.H. Schröder ◽  
B.G. Blijenberg
Keyword(s):  
Prostate Cancer ◽  
Prostate Specific Antigen ◽  
Specific Antigen ◽  
Serum Markers ◽  
Human Kallikrein 2 ◽  
Kallikrein 2

Molecular forms of prostate-specific antigen and human kallikrein 2 (hK2) in urine are not clinically useful for early detection and staging of prostate cancer

Urology ◽  
1997 ◽  
Vol 50 (5) ◽  
pp. 715-721 ◽  
Author(s):  
Jürgen Pannek ◽  
Harry G. Rittenhouse ◽  
Cindy L. Evans ◽  
Judith A. Finlay ◽  
Debra J. Bruzek ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Early Detection ◽  
Prostate Specific Antigen ◽  
Specific Antigen ◽  
Molecular Forms ◽  
Human Kallikrein 2 ◽  
Kallikrein 2

scholarly journals Comparison of Free and Total Forms of Serum Human Kallikrein 2 and Prostate-Specific Antigen for Prediction of Locally Advanced and Recurrent Prostate Cancer

2007 ◽  
Vol 53 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Thomas Steuber ◽  
Andrew J Vickers ◽  
Angel M Serio ◽  
Ville Vaisanen ◽  
Alexander Haese ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Seminal Vesicle ◽  
Prostate Specific Antigen ◽  
Locally Advanced ◽  
Specific Antigen ◽  
Extracapsular Extension ◽  
Seminal Vesicle Invasion ◽  
Preoperative Serum ◽  
Human Kallikrein 2 ◽  
Kallikrein 2

Abstract Background: We evaluated the association of total and free forms of serum human kallikrein 2 (hK2) and prostate-specific antigen (PSA) with prostate cancers of unfavorable prognosis. Methods: We retrospectively measured total PSA (tPSA), free PSA (fPSA), and total hK2 (thK2) in preoperative serum samples from 867 men [and assessed free hK2 (fhK2) measured in 577 of these men] treated with radical prostatectomy for clinically localized prostate cancer. Associations between biomarker concentrations and extracapsular extension, seminal vesicle invasion, and biochemical recurrence (BCR) were evaluated. A subset of patients with PSA ≤10 μg/L, the group most commonly seen in clinical practice in the US, was analyzed. Results: thK2 was the strongest predictor of extracapsular extension and seminal vesicle invasion (areas under the ROC curve [AUC], 0.662 and 0.719, respectively), followed by tPSA (AUC, 0.654 and 0.663). All biomarkers were significant predictors of BCR. hK2 forms, but not PSA forms, remained highly significant for predicting BCR in the low-PSA group. Combining tPSA, fPSA, and thK2 in a multivariable model improved prediction compared with any biomarker used individually (AUC, 0.711, 0.755, and 0.752 for this combination predicting extracapsular extension, seminal vesicle invasion, and BCR, respectively; P <0.001 for all). Conclusions: Increased concentrations of hK2 in the blood are significantly associated with unfavorable features of prostate cancer, and thK2 is predictive of locally advanced and recurrent cancer in patients with PSA ≤10 μg/L. Independent of tPSA and fPSA, hK2 predicts unfavorable prognosis.

956: Evaluation of Human Glandular Kallikrein 2 and Free Prostate-Specific Antigen Levels as Predictors of Biochemical Recurrence after Radical Prostatectomy for Localized Prostate Cancer

2005 ◽  
Vol 173 (4S) ◽  
pp. 259-259
Author(s):  
Thomas Steuber ◽  
Alexander Haese ◽  
Andrew J. Vickers ◽  
Charlotte Becker ◽  
Felix K.-H. Chun ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Radical Prostatectomy ◽  
Prostate Specific Antigen ◽  
Biochemical Recurrence ◽  
Specific Antigen ◽  
Localized Prostate Cancer ◽  
Glandular Kallikrein ◽  
Kallikrein 2

scholarly journals Development of Sensitive Immunoassays for Free and Total Human Glandular Kallikrein 2

2004 ◽  
Vol 50 (9) ◽  
pp. 1607-1617 ◽  
Author(s):  
Ville Väisänen ◽  
Susann Eriksson ◽  
Kaisa K Ivaska ◽  
Hans Lilja ◽  
Martti Nurmi ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Detection Limit ◽  
Solid Phase ◽  
Specific Antigen ◽  
Control Group ◽  
Serum Samples ◽  
Human Kallikrein 2 ◽  
Kallikrein 2 ◽  
Capture Antibody ◽  
Total Psa

Abstract Background: Free and total human kallikrein 2 (hK2) might improve the discrimination between prostate cancer and benign prostatic hyperplasia. Concentrations of hK2 are 100-fold lower than concentrations of prostate-specific antigen (PSA); therefore, an hK2 assay must have a low detection limit and good specificity. Methods: PSA- and hK2-specific monoclonal antibodies were used in solid-phase, two-site immunofluorometric assays to detect free and total hK2. The total hK2 assay used PSA-specific antibodies to block nonspecific signal. The capture antibody of the free hK2 assay did not cross-react with PSA. To determine the hK2 concentrations in the male bloodstream, total hK2 was measured in a control group consisting of 426 noncharacterized serum samples. Free and total hK2 were measured in plasma from 103 patients with confirmed prostate cancer. Results: All 426 males in the control group had a total hK2 concentration above the detection limit of 0.0008 μg/L. The median total hK2 concentration was 0.022 μg/L (range, 0.0015–0.37 μg/L). hK2 concentrations were 0.1–58% of total PSA (median, 3.6%). hK2 concentrations were similar in men 41–50 and 51–60 years of age. The ratio of hK2 to PSA steadily decreased from 5–30% at PSA <1 μg/L to 1–2% at higher PSA concentrations. In 103 patients with prostate cancer, the median hK2 concentration in plasma was 0.079 μg/L (range, 0.0015–16.2 μg/L). The median free hK2 concentration was 0.070 (range, 0.005–12.2) μg/L. The proportion of free to total hK2 varied from 17% to 131% (mean, 85%). Conclusions: The wide variation in the free-to-total hK2 ratio suggests that hK2 in blood plasma is not consistently in the free, noncomplexed form in patients with prostate cancer. The new assay is sufficiently sensitive to be used to study the diagnostic accuracies of free and total hK2 for prostate cancer.

Sign in / Sign up

Export Citation Format

Share Document