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Published in: BMC Cancer 1/2017

Open Access 01-12-2017 | Research article

Increased ERCC1 expression is linked to chromosomal aberrations and adverse tumor biology in prostate cancer

Authors: Frank Jacobsen, Billurvan Taskin, Nathaniel Melling, Charlotte Sauer, Corinna Wittmer, Claudia Hube-Magg, Martina Kluth, Ronald Simon, Dirk Pehrke, Burkhard Beyer, Thomas Steuber, Imke Thederan, Guido Sauter, Thorsten Schlomm, Waldemar Wilczak, Katharina Möller, Sören A. Weidemann, Susanne Burdak-Rothkamm

Published in: BMC Cancer | Issue 1/2017

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Abstract

Background

Animal model experiments have suggested a role of the DNA repair protein ERCC1 (Excision Repair Cross-Complementation Group 1) in prostate cancer progression.

Methods

To better understand the impact of ERCC1 protein expression in human prostate cancer, a preexisting tissue microarray (TMA) containing more than 12,000 prostate cancer specimens was analyzed by immunohistochemistry and data were compared with tumor phenotype, PSA recurrence and several of the most common genomic alterations (TMPRSS2:ERG fusions: deletions of PTEN, 6q, 5q, 3p).

Results

ERCC1 staining was seen in 64.7% of 10,436 interpretable tissues and was considered weak in 37.1%, moderate in 22.6% and strong in 5% of tumors. High-level ERCC1 staining was linked to advanced pT stage, high Gleason grade, positive lymph nodes, high pre-operative serum PSA, and positive surgical margin status (p < 0.0001 each). High ERCC1 expression was strongly associated with an elevated risk of PSA recurrence (p < 0.0001). This was independent of established prognostic features. A subgroup analysis of cancers defined by comparable quantitative Gleason grades revealed that the prognostic impact was mostly driven by low-grade tumors with a Gleason 3 + 3 or 3 + 4 (Gleason 4: ≤5%). High ERCC1 expression was strongly associated with the presence of genomic alterations and expression levels increased with the number of deletions present in the tumor. These latter data suggest a functional relationship of ERCC1 expression with genomic instability.

Conclusion

The results of our study demonstrate that expression of ERCC1 - a potential surrogate for genomic instability - is an independent prognostic marker in prostate cancer with particular importance in low-grade tumors.
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Metadata
Title
Increased ERCC1 expression is linked to chromosomal aberrations and adverse tumor biology in prostate cancer
Authors
Frank Jacobsen
Billurvan Taskin
Nathaniel Melling
Charlotte Sauer
Corinna Wittmer
Claudia Hube-Magg
Martina Kluth
Ronald Simon
Dirk Pehrke
Burkhard Beyer
Thomas Steuber
Imke Thederan
Guido Sauter
Thorsten Schlomm
Waldemar Wilczak
Katharina Möller
Sören A. Weidemann
Susanne Burdak-Rothkamm
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Cancer / Issue 1/2017
Electronic ISSN: 1471-2407
DOI
https://doi.org/10.1186/s12885-017-3489-9

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