Volume 120, Issue 3 pp. 524-532
Cancer Genetics

Allelotyping analyses of synchronous primary and metastasis CIN colon cancers identified different subtypes

Jean-Christophe Weber

Jean-Christophe Weber

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Nicolas Meyer

Nicolas Meyer

Département de Santé Publique, Hôpital Civil, Place de l'Hôpital, Strasbourg Cedex, France

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Erwan Pencreach

Erwan Pencreach

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Anne Schneider

Anne Schneider

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Eric Guérin

Eric Guérin

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Agnès Neuville

Agnès Neuville

Laboratoire d'Anatomie Pathologique, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Christine Stemmer

Christine Stemmer

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Cécile Brigand

Cécile Brigand

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Philippe Bachellier

Philippe Bachellier

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Serge Rohr

Serge Rohr

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Michèle Kedinger

Michèle Kedinger

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Christian Meyer

Christian Meyer

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Dominique Guenot

Dominique Guenot

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Pierre Oudet

Pierre Oudet

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Daniel Jaeck

Daniel Jaeck

Centre de Chirurgie Viscérale et Transplantation, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

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Marie-Pierre Gaub

Corresponding Author

Marie-Pierre Gaub

Laboratoire de Biochimie et Biologie Moléculaire, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

INSERM U682, Hôpital de Hautepierre, Avenue Molière, Strasbourg Cedex, France

Fax: +33-3-88-12-75-39.

Laboratoire de Biochimie et Biologie Moléculaire, INSERM U 682, Avenue Molière, 67098 Strasbourg Cedex, FranceSearch for more papers by this author
First published: 09 November 2006
Citations: 27

Abstract

In colorectal cancer, the molecular alterations that lead to metastasis are not clearly established, probably because of their high genetic complexity. To identify combinations of genetic changes involved in tumor progression and metastasis, we focused on chromosome instable (CIN) colon cancers. We compared by allelotyping of 33 microsatellites, the genomic alterations of 38 primary colon tumors with the synchronously resected matched liver metastases (CLM). We observed that (i) the number of patients with alterations at certain loci did not differ significantly between the whole primary tumor and the paired CLM, (ii) a group of patients had fewer alterations in the metastasis when compared with the matched primary tumor. A 2-way hierarchical unsupervised clustering of the allelotyping data revealed 2 tumor subtypes that have different levels of CIN (CIN-High, CIN-Low). Both subtypes have a minimal common set of alterations at chromosomes 8p, 17p and 18q, but does not include alteration at 5q or mutation at K-Ras. These 2 subtypes were also observed using a collection of 104 independent primary CIN colon tumors. In addition, we found a third subtype, consisting of tumors with a very low number of alterations not associated with specific loci (CIN-Very Low). We found that colon carcinogenesis may require a minimal set of alterations and that, in contrast to the current hypothesis, the level of CIN does not correlate with tumor progression. Therefore, our results suggest that metastasis potential could be present at very early stages of tumor development. © 2006 Wiley-Liss, Inc.

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