Recurrent genomic imbalances in B-cell splenic marginal-zone lymphoma revealed by comparative genomic hybridization

Claus L. Andersen, Alicja Gruszka-Westwood, Shayne Atkinson, Estella Matutes, Daniel Catovsky, Rikke K. Pedersen, Bjarne B. Pedersen, Stanislaw Pulczynski, Peter Hokland, Elisa Jacobsen, Jørn Koch

Research output: Contribution to journalArticle

Abstract

The cytogenetics of splenic marginal zone lymphoma (SMZL) is less well characterized than the cytogenetics of other non-Hodgkin B-cell lymphomas. The aim of this study was to address this issue by identifying characteristic copy number imbalances in SMZL, for which purpose we analyzed 20 SMZL cases by comparative genomic hybridization (CGH), adding chromosome banding and fluorescence in situ hybridization (FISH) in some cases. CGH identified copy number imbalances in 70% of the cases. Imbalances were recurrently observed for chromosomes 3 (20%), 6 (20%), 7 (25%), 12 (20%), and 14 (10%). The minimally involved regions of these chromosomes were gains of 3q25∼qter and 12q13∼q15, and loss of 6q23, 7q31, and 14q22∼q24. A compilation of our data with data from 3 previous SMZL CGH studies revealed a significant heterogeneity between the studies. Eleven imbalances were recurrently observed in the compiled data set, as opposed to only 5 in our data set. The most frequently observed imbalances in the 73 SMZL cases of the compiled data set were gains of 3q (27%) and 12q (15%), and loss of 7q (18%). Our data suggest that SMZL constitute a genetically heterogeneous disease where gain of 3q25 and loss of 7q31 are the most likely imbalances to be involved in the pathogenesis of the disease.

Original languageEnglish
Pages (from-to)122-128
Number of pages7
JournalCancer Genetics and Cytogenetics
Volume156
Issue number2
DOIs
Publication statusPublished - Jan 15 2005

ASJC Scopus subject areas

  • Cancer Research
  • Genetics
  • Molecular Biology

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  • Cite this

    Andersen, C. L., Gruszka-Westwood, A., Atkinson, S., Matutes, E., Catovsky, D., Pedersen, R. K., Pedersen, B. B., Pulczynski, S., Hokland, P., Jacobsen, E., & Koch, J. (2005). Recurrent genomic imbalances in B-cell splenic marginal-zone lymphoma revealed by comparative genomic hybridization. Cancer Genetics and Cytogenetics, 156(2), 122-128. https://doi.org/10.1016/j.cancergencyto.2004.04.026