IgH partner breakpoint sequences provide evidence that AID initiates t(11;14) and t(8;14) chromosomal breaks in mantle cell and Burkitt lymphomas

Harvey A. Greisman, Zhengfei Lu, Albert G. Tsai, Timothy C. Greiner, Hye Son Yi, Michael R. Lieber

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Previous studies have implicated activation-induced cytidine deaminase (AID) in B-cell translocations but have failed to identify any association between their chromosomal breakpoints and known AID target sequences. Analysis of 56 unclustered IgH-CCND1 translocations in mantle cell lymphoma across the ∼344-kb bcl-1 breakpoint locus demonstrates that half of the CCND1 breaks are near CpG dinucleotides. Most of these CpG breaks are at CGC motifs, and half of the remaining breaks are near WGCW, both known AID targets. These findings provide the strongest evidence to date that AID initiates chromosomal breaks in translocations that occur in human bone marrow B-cell progenitors. We also identify WGCW breaks at the MYC locus in Burkitt lymphoma translocations and murine IgH-MYC translocations, both of which arise in mature germinal center B cells. Finally, we propose a developmental model to explain the transition from CpG breaks in early human B-cell progenitors toWGCWbreaks in later stage B cells.

Original languageEnglish (US)
Pages (from-to)2864-2867
Number of pages4
JournalBlood
Volume120
Issue number14
DOIs
StatePublished - Oct 4 2012

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

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