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Published in: Cancer Chemotherapy and Pharmacology 2/2009

Open Access 01-07-2009 | Original Article

Topoisomerase I and IIα protein expression in primary colorectal cancer and recurrences following 5-fluorouracil-based adjuvant chemotherapy

Authors: Nicolas Tsavaris, Andreas Lazaris, Christos Kosmas, Panagiotis Gouveris, Nikolaos Kavantzas, Petros Kopterides, Thomas Papathomas, George Arapogiannis, Haralambos Zorzos, Vassiliki Kyriakou, Efstathios Patsouris

Published in: Cancer Chemotherapy and Pharmacology | Issue 2/2009

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Abstract

Purpose

Human DNA topoisomerases I and II (topo-I and -II) are essential for vital cellular processes such as DNA replication, transcription, translation, recombination, and repair. In the present study, we correlate topo-I and -II expression and outcome after chemotherapy in primary and relapsed colorectal cancer.

Patients and methods

Patients with colorectal cancer that had recurred, following surgery and adjuvant chemotherapy and underwent a second operation were included in the present study. All had undergone surgical resection of the primary tumor and received post-operatively 5-FU-based (5FU + Leucovorin, Mayo Clinic regimen) adjuvant chemotherapy. Tumor tissue was collected at the initial operation from the primary tumor and at the time of recurrence (during the second operation following chemotherapy). All tissue samples were analyzed for levels of expression of both topo-I and topo-IIa using standard three-step immunohistochemistry on paraffin sections.

Results

Forty patients were included. Levels of expression of topo-I and topo-II were higher in malignant cells from tumor recurrences compared to primary tumors (= 0.0001 for both). There was a statistically significant positive relationship between patients age and levels of topo-I (= 0.011) and topo-II (= 0.011) expression.

Conclusions

The study results reported here underscore the role of topoisomerase expression in colorectal cancer and suggest a potential role in tumor recurrence.
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Metadata
Title
Topoisomerase I and IIα protein expression in primary colorectal cancer and recurrences following 5-fluorouracil-based adjuvant chemotherapy
Authors
Nicolas Tsavaris
Andreas Lazaris
Christos Kosmas
Panagiotis Gouveris
Nikolaos Kavantzas
Petros Kopterides
Thomas Papathomas
George Arapogiannis
Haralambos Zorzos
Vassiliki Kyriakou
Efstathios Patsouris
Publication date
01-07-2009
Publisher
Springer-Verlag
Published in
Cancer Chemotherapy and Pharmacology / Issue 2/2009
Print ISSN: 0344-5704
Electronic ISSN: 1432-0843
DOI
https://doi.org/10.1007/s00280-008-0886-4

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