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Title: Matrix-comparative genomic hybridization from multicenter formalin-fixed paraffin-embedded colorectal cancer tissue blocks
Authors: Fensterer, Heiko ×
Radlwimmer, Bernhard
Sträter, Jörn
Buchholz, Malte
Aust, Daniela E
Julié, Catherine
Radvanyi, François
Nordlinger, Bernard
Belluco, Claudio
Van Cutsem, Eric
Köhne, Claus-Henning
Kestler, Hans A
Schwaenen, Carsten
Nessling, Michelle
Lutz, Manfred P
Lichter, Peter
Gress, Thomas M #
Issue Date: Apr-2007
Series Title: BMC cancer vol:7
Article number: 58
Abstract: BACKGROUND: The identification of genomic signatures of colorectal cancer for risk stratification requires the study of large series of cancer patients with an extensive clinical follow-up. Multicentric clinical studies represent an ideal source of well documented archived material for this type of analyses. METHODS: To verify if this material is technically suitable to perform matrix-CGH, we performed a pilot study using macrodissected 29 formalin-fixed, paraffin-embedded tissue samples collected within the framework of the EORTC-GI/PETACC-2 trial for colorectal cancer. The scientific aim was to identify prognostic genomic signatures differentiating locally restricted (UICC stages II-III) from systemically advanced (UICC stage IV) colorectal tumours. RESULTS: The majority of archived tissue samples collected in the different centers was suitable to perform matrix-CGH. 5/7 advanced tumours displayed 13q-gain and 18q-loss. In locally restricted tumours, only 6/12 tumours showed a gain on 13q and 7/12 tumours showed a loss on 18q. Interphase-FISH and high-resolution array-mapping of the gain on 13q confirmed the validity of the array-data and narrowed the chromosomal interval containing potential oncogenes. CONCLUSION: Archival, paraffin-embedded tissue samples collected in multicentric clinical trials are suitable for matrix-CGH analyses and allow the identification of prognostic signatures and aberrations harbouring potential new oncogenes.
URI: 
ISSN: 1471-2407
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Translational Research in GastroIntestinal Disorders
Clinical Digestive Oncology (+)
× corresponding author
# (joint) last author

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