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Published in: International Journal of Colorectal Disease 2/2009

01-02-2009 | Original Article

Molecular and clinico-pathological markers in rectal cancer: a tissue micro-array study

Authors: Annelies Debucquoy, Laurence Goethals, Louis Libbrecht, Christiaan Perneel, Karel Geboes, Nadine Ectors, William H. McBride, Karin Haustermans

Published in: International Journal of Colorectal Disease | Issue 2/2009

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Abstract

Aims

The aims of the study were to study the effect of pre-operative treatment on the expression of tumour-related proteins and to correlate the expression of these proteins with response and survival of patients with advanced rectal cancer.

Materials and methods

Tissue micro-arrays from pre- and post-treatment biopsies of 99 patients with rectal cancer treated with pre-operative (chemo)radiotherapy were stained for epidermal growth factor receptor (EGFR), carbonic anhydrase IX, Ki67, vascular endothelial growth factor, cyclo-oxygenase 2 (COX-2) and cleaved cytokeratin 18 (c-CK18). Also, fibro-inflammatory alterations after treatment were evaluated.

Results

Pre-operative (chemo)radiotherapy caused fibro-inflammatory changes, a downregulation of proliferation (Ki67) and EGFR and an upregulation of apoptosis (cleaved CK18). Patients with a good regression during pre-operative treatment showed less proliferating and apoptotic cells in the resection specimen. Multivariate analysis showed that T downstaging, fibro-inflammatory changes in the resection specimen and COX-2 expression in the biopsy correlated with overall survival.

Conclusions

Pre-operative treatment has an effect on proliferation, apoptosis, inflammation and EGFR expression. The classical clinical parameters as well as fibro-inflammatory changes and COX-2 expression seem most valuable as predictors for survival.
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Metadata
Title
Molecular and clinico-pathological markers in rectal cancer: a tissue micro-array study
Authors
Annelies Debucquoy
Laurence Goethals
Louis Libbrecht
Christiaan Perneel
Karel Geboes
Nadine Ectors
William H. McBride
Karin Haustermans
Publication date
01-02-2009
Publisher
Springer-Verlag
Published in
International Journal of Colorectal Disease / Issue 2/2009
Print ISSN: 0179-1958
Electronic ISSN: 1432-1262
DOI
https://doi.org/10.1007/s00384-008-0608-8

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