Matrix-comparative genomic hybridization from multicenter formalin-fixed paraffin-embedded colorectal cancer tissue blocks

Heiko Fensterer, Bernhard Radlwimmer, Jörn Sträter, Malte Buchholz, Daniela E. Aust, Catherine Julié, François Radvanyi, Bernard Nordlinger, Claudio Belluco, Eric Van Cutsem, Claus Henning Köhne, Hans A. Kestler, Carsten Schwaenen, Michelle Nessling, Manfred P. Lutz, Peter Lichter, Thomas M. Gress

Research output: Contribution to journalArticlepeer-review


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 materialis 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.

Original languageEnglish
Article number58
JournalBMC Cancer
Publication statusPublished - Apr 2 2007

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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