Frequent disruption of the RB pathway in indolent follicular lymphoma suggests a new combination therapy

Elisa Oricchio, Giovanni Ciriello, Man Jiang, Michael H. Boice, Jonathan H. Schatz, Adriana Heguy, Agnes Viale, Elisa de Stanchina, Julie Teruya-Feldstein, Alyssa Bouska, Tim McKeithan, Chris Sander, Wayne Tam, Venkatraman E. Seshan, Wing Chung Chan, R. S.K. Chaganti, Hans Guido Wendel

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Loss of cell cycle controls is a hallmark of cancer and has a well-established role in aggressive B cell malignancies. However, the role of such lesions in indolent follicular lymphoma (FL) is unclear and individual lesions have been observed with low frequency. By analyzing genomic data from two large cohorts of indolent FLs, we identify a pattern of mutually exclusive (P = 0.003) genomic lesions that impair the retinoblastoma (RB) pathway in nearly 50% of FLs. These alterations include homozygous and heterozygous deletions of the p16/ CDKN2a/b (7%) and RB1 (12%) loci, and more frequent gains of chromosome 12 that include CDK4 (29%). These aberrations are associated with high-risk disease by the FL prognostic index (FLIPI), and studies in a murine FL model confirm their pathogenic role in indolent FL. Increased CDK4 kinase activity toward RB1 is readily measured in tumor samples and indicates an opportunity for CDK4 inhibition. We find that dual CDK4 and BCL2 inhibitor treatment is safe and effective against available models of FL. In summary, frequent RB pathway lesions in indolent, high-risk FLs indicate an untapped therapeutic opportunity.

Original languageEnglish (US)
Pages (from-to)1379-1391
Number of pages13
JournalJournal of Experimental Medicine
Issue number7
StatePublished - Jun 2014

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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