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Diagnosis of prostate cancer by detection of minichromosome maintenance 5 protein in urine sediments.

Abstract：

BACKGROUND:The accuracy of prostate-specific antigen (PSA) testing in prostate cancer detection is constrained by low sensitivity and specificity. Dysregulated expression of minichromosome maintenance (Mcm) 2-7 proteins is an early event in epithelial multistep carcinogenesis and thus MCM proteins represent powerful cancer diagnostic markers. In this study we investigate Mcm5 as a urinary biomarker for prostate cancer detection. METHODS:Urine was obtained from 88 men with prostate cancer and from two control groups negative for malignancy. A strictly normal cohort included 28 men with complete, normal investigations, no urinary calculi and serum PSA <2 ng ml(-1). An expanded control cohort comprised 331 men with a benign final diagnosis, regardless of PSA level. Urine was collected before and after prostate massage in the cancer patient cohort. An immunofluorometric assay was used to measure Mcm5 levels in urine sediments. RESULTS:The Mcm5 test detected prostate cancer with 82% sensitivity (confidence interval (CI)= 72-89%) and with a specificity ranging from 73 (CI=68-78%) to 93% (CI=76-99%). Prostate massage led to increased Mcm5 signals compared with pre-massage samples (median 3440 (interquartile range (IQR) 2280 to 5220) vs 2360 (IQR <1800 to 4360); P=0.009), and was associated with significantly increased diagnostic sensitivity (82 vs 60%; P=0.012). CONCLUSIONS:Urinary Mcm5 detection seems to be a simple, accurate and noninvasive method for identifying patients with prostate cancer. Large-scale prospective trials are now required to evaluate this test in diagnosis and screening.

journal_name

Br J Cancer

journal_title

British journal of cancer

authors

Dudderidge TJ,Kelly JD,Wollenschlaeger A,Okoturo O,Prevost T,Robson W,Leung HY,Williams GH,Stoeber K

doi

10.1038/sj.bjc.6605785

subject

Has Abstract

pub_date

2010-08-24 00:00:00

pages

701-7

issue

5

eissn

0007-0920

issn

1532-1827

pii

6605785

journal_volume

103

pub_type

杂志文章

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