BCL2 mutations are associated with increased risk of transformation and shortened survival in follicular lymphoma

Cristina Correia, Paula A. Schneider, Haiming Dai, Ahmet Dogan, Matthew J. Maurer, Amy K. Church, Anne J. Novak, Andrew L. Feldman, Xiaosheng Wu, Husheng Ding, X. Wei Meng, James R. Cerhan, Susan L. Slager, William R. Macon, Thomas M. Habermann, Judith E. Karp, Steven D. Gore, Neil E. Kay, Diane F. Jelinek, Thomas E. WitzigGrzegorz S. Nowakowski, Scott H. Kaufmann

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


Follicular lymphoma (FL), an indolent neoplasm caused by a t(14;18) chromosomal translocation that juxtaposes the BCL2 gene and immunoglobulin locus, has a variable clinical course and frequently undergoes transformation to an aggressive lymphoma. Although BCL2 mutations have been previously described, their relationship to FL progression remains unclear. In this study, we evaluated the frequency and nature of BCL2 mutations in 2 independent cohorts of grade 1 and 2 FLs, along with the correlation between BCL2 mutations, transformation risk, and survival. The prevalence of BCL2 coding sequence mutations was 12% in FL at diagnosis and 53% at transformation (P < .0001).The presence of these BCL2 mutations at diagnosis correlated with an increased risk of transformation (hazard ratio 3.6; 95% CI, 2.0-6.2; P < .0001) and increased risk of death due to lymphoma (median survival of 9.5 years with BCL2 mutations vs 20.4 years without; P = .012). In a multivariate analysis, BCL2 mutations and high FL international prognostic index were independent risk factors for transformation and death due to lymphoma. Some mutant Bcl-2 proteins exhibited enhanced antiapoptotic capacity in vitro. Accordingly, BCL2 mutations can affect antiapoptotic Bcl-2 function, are associated with increased activation-induced cytidine deaminase expression, and correlate with increased risk of transformation and death due to lymphoma.

Original languageEnglish (US)
Pages (from-to)658-667
Number of pages10
Issue number4
StatePublished - Jan 22 2015

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology


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