Gene expression analysis uncovers similarity and differences among Burkitt lymphoma subtypes

Pier Paolo Piccaluga, Giulia De Falco, Manjunath Kustagi, Anna Gazzola, Claudio Agostinelli, Claudio Tripodo, Eleonora Leucci, Anna Onnis, Annalisa Astolfi, Maria Rosaria Sapienza, Cristiana Bellan, Stefano Lazzi, Lynnette Tumwine, Michael Mawanda, Martin Ogwang, Valeria Calbi, Serena Formica, Andrea Califano, Stefano A Pileri, Lorenzo Leoncini

    96 Citations (Scopus)

    Abstract

    Burkitt lymphoma (BL) is classified into 3 clinical subsets: endemic, sporadic, and immunodeficiency-associated BL. So far, possible differences in their gene expression profiles (GEPs) have not been investigated. We studied GEPs of BL subtypes, other B-cell lymphomas, and B lymphocytes; first, we found that BL is a unique molecular entity, distinct from other B-cell malignancies. Indeed, by unsupervised analysis all BLs clearly clustered apart of other lymphomas. Second, we found that BL subtypes presented slight differences in GEPs. Particularly, they differed for genes involved in cell cycle control, B-cell receptor signaling, and tumor necrosis factor/nuclear factor κB pathways. Notably, by reverse engineering, we found that endemic and sporadic BLs diverged for genes dependent on RBL2 activity. Furthermore, we found that all BLs were intimately related to germinal center cells, differing from them for molecules involved in cell proliferation, immune response, and signal transduction. Finally, to validate GEP, we applied immunohistochemistry to a large panel of cases and showed that RBL2 can cooperate with MYC in inducing a neoplastic phenotype in vitro and in vivo. In conclusion, our study provided substantial insights on the pathobiology of BLs, by offering novel evidences that may be relevant for its classification and possibly future treatment.

    Original languageEnglish
    JournalBlood
    Volume117
    Issue number13
    Pages (from-to)3596-608
    Number of pages13
    ISSN0006-4971
    DOIs
    Publication statusPublished - 31 Mar 2011

    Keywords

    • Animals
    • Burkitt Lymphoma
    • Cell Line, Tumor
    • Cluster Analysis
    • Gene Expression Profiling
    • Gene Expression Regulation, Neoplastic
    • Humans
    • Mice
    • Mice, Nude
    • Microarray Analysis
    • Neoplasm Transplantation
    • Phenotype
    • Transplantation, Heterologous

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