Distinct comparative genomic hybridisation profiles in gastric mucosa-associated lymphoid tissue lymphomas with and without t(11;18)(q21;q21)

Yuanping Zhou, Hongtao Ye, Jose I. Martin-Subero, Rifat Hamoudi, Yong Jie Lu, Rubin Wang, Reiner Siebert, Janet Shipley, Peter G. Isaacson, Ahmet Dogan, Ming Qing Du

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

t(11;18)(q21;q21) occurs specifically in mucosa-associated lymphoid tissue (MALT) lymphoma and the translocation generates a functional API2-MALT1 fusion product that activates nuclear factor (NF)κB. t(11;18) positive lymphomas usually lack the chromosomal aberrations and microsatellite alterations frequently seen in the translocation-negative MALT lymphomas. To further understand their genetic differences, we investigated gastric MALT lymphomas with and without t(11;18) by comparative genomic hybridisation. In general, both chromosomal gains and losses were far more frequent in t(11;18)-negative (median = 3.4 imbalances) than t(11;18)-positive cases (median = 1.6 imbalances), with gains being more frequent than losses. Recurrent chromosomal gains involving whole or major parts of a chromosome were seen for chromosomes 3, 12, 18 and 22 (23%, 19%, 19% and 27% respectively). Discrete recurrent chromosomal gains were found at 9q34 (11/26 = 42%). Bioinformatic analysis of genes mapping to 9q34 revealed potential targets. Among them, TRAF2 and CARD9 are known interaction partners of BCL10, playing a role in NFκB activation. Interphase fluorescent in situ hybridisation confirmed genomic gain of the TRAF2, CARD9 and MALT1 loci in 5/6 and 2/2 cases showing chromosomal gains at 9q34 and 18q21 respectively. The results further highlight the genetic difference between MALT lymphomas with and without t(11;18). Moreover, our findings suggest that genomic gain of genes that modulate NFκB activation, such as MALT1, TRAF2 and CARD9, may play a role in the pathogenesis of the translocation-negative MALT lymphoma.

Original languageEnglish (US)
Pages (from-to)35-42
Number of pages8
JournalBritish journal of haematology
Volume133
Issue number1
DOIs
StatePublished - Apr 1 2006

Keywords

  • CARD9
  • Comparative genomic hybridisation
  • MALT1
  • Mucosa-associated lymphoid tissue lymphoma
  • TRAF2
  • t(11;18)

ASJC Scopus subject areas

  • Hematology

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    Zhou, Y., Ye, H., Martin-Subero, J. I., Hamoudi, R., Lu, Y. J., Wang, R., Siebert, R., Shipley, J., Isaacson, P. G., Dogan, A., & Du, M. Q. (2006). Distinct comparative genomic hybridisation profiles in gastric mucosa-associated lymphoid tissue lymphomas with and without t(11;18)(q21;q21). British journal of haematology, 133(1), 35-42. https://doi.org/10.1111/j.1365-2141.2006.05969.x