Breakpoints of the t(11;18)(q21;q21) in mucosa-associated lymphoid tissue (MALT) lymphoma lie within or near the previously undescribed gene MALT1 in chromosome 18

Jeffrey A. Morgan, Yi Yin, Alexander D Borowsky, Frank Kuo, Nicole Nourmand, Jason I. Koontz, Carol Reynolds, Lee Soreng, Constance A. Griffin, Fiona Graeme-Cook, Nancy L. Harris, Dennis Weisenburger, Geraldine S. Pinkus, Jonathan A. Fletcher, Jeffrey Sklar

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151 Scopus citations

Abstract

Lymphomas arising in mucosa-associated lymphoid tissue (MALT) are indolent B-cell tumors that have a predilection for epithelial sites and often develop in a setting of chronic inflammation or autoimmunity. As many as 50% of low-grade MALT lymphomas contain an (11;18)(q21; q21) chromosomal translocation. Using fluorescence in situ hybridization, we have analyzed the position of recombination within chromosome 18 DNA in three examples of MALT lymphoma bearing this translocation. In all three cases, the breakpoint maps to DNA in BAC b357H2, covering about 150 kb of sequence. A previously undescribed, ubiquitously ex- pressed gene, which we refer to as MALT1, was identified within this sequence and was found to be broken in one case for which we have definitively located the position of recombination between chromosomes 18 and 11. The sequence of this gene indicates the presence of two immunoglobulin-like C2 domains and a region of partial homology to caspases, suggesting a possible role for MALT1 in the regulation of apoptosis.

Original languageEnglish (US)
Pages (from-to)6205-6213
Number of pages9
JournalCancer Research
Volume59
Issue number24
StatePublished - Dec 15 1999
Externally publishedYes

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ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Morgan, J. A., Yin, Y., Borowsky, A. D., Kuo, F., Nourmand, N., Koontz, J. I., Reynolds, C., Soreng, L., Griffin, C. A., Graeme-Cook, F., Harris, N. L., Weisenburger, D., Pinkus, G. S., Fletcher, J. A., & Sklar, J. (1999). Breakpoints of the t(11;18)(q21;q21) in mucosa-associated lymphoid tissue (MALT) lymphoma lie within or near the previously undescribed gene MALT1 in chromosome 18. Cancer Research, 59(24), 6205-6213.