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Engrailed-2 (EN2): A Tumor Specific Urinary Biomarker for the Early Diagnosis of Prostate Cancer

Morgan, R, Boxall, A, Bhatt, A, Bailey, M, Hindley, R, Langley, S, Whitaker, HC, Neal, DE, Ismail, M, Whitaker, H, Annels, N, Michael, A and Pandha, H (2011) Engrailed-2 (EN2): A Tumor Specific Urinary Biomarker for the Early Diagnosis of Prostate Cancer CLINICAL CANCER RESEARCH, 17 (5). 1090 - 1098. ISSN 1078-0432

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Purpose: Prostate cancer (PC) is the second most common cause of cancer related death in men. A number of key limitations with prostate specific antigen (PSA), currently the standard detection test, has justified evaluation of new biomarkers. We have assessed the diagnostic potential of EN2 protein, a homeodomain-containing transcription factor expressed in PC cell lines and secreted into the urine by PC in men.

Experimental Design: EN2 expression in PC cell lines and prostate cancer tissue was determined by semi-quantative RT-PCR and immunohistochemistry. First pass urine (without prior digital rectal examination (DRE)) was collected from men presenting with urinary symptoms (referred to exclude/confirm the presence of prostate cancer) and from controls. EN2 protein was measured by ELISA in urine from men with PC (n=82) and controls (n=102).

Results: EN2 was expressed and secreted by PC cell lines and PC tissue but not by normal prostate tissue or stroma. The presence of EN2 in urine was highly predictive of PC, with a sensitivity of 66% and a specificity of 88.2%, without requirement for DRE. There was no correlation with PSA levels. These results were confirmed independently by a second academic centre.

Conclusions: Urinary EN2 is a highly specific and sensitive candidate biomarker of prostate cancer. A larger multicentre study to further evaluate the diagnostic potential of EN2 is justified.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Life Sciences & Biomedicine, Oncology, ANTIGEN LEVEL, CELL-DEATH, HOX GENES, CARCINOMA, MEN, SECRETION, BIOPSY, MARKER, TRIAL, RATES
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Divisions: Faculty of Health and Medical Sciences > Clinical Medicine
Depositing User: Christina Daoutis
Date Deposited: 02 Mar 2011 09:42
Last Modified: 14 Sep 2013 13:35

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