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  • Title: Aberrant somatic hypermutation in transformation of follicular lymphoma and chronic lymphocytic leukemia to diffuse large B-cell lymphoma.
    Author: Rossi D, Berra E, Cerri M, Deambrogi C, Barbieri C, Franceschetti S, Lunghi M, Conconi A, Paulli M, Matolcsy A, Pasqualucci L, Capello D, Gaidano G.
    Journal: Haematologica; 2006 Oct; 91(10):1405-9. PubMed ID: 17018394.
    Abstract:
    The molecular mechanisms involved in histologic transformation of follicular lymphoma (FL) and B-chronic lymphocytic leukemia (B-CLL) to diffuse large B-cell lymphoma (DLBCL) are heterogeneous and largely unknown. Here we explored whether aberrant somatic hypermutation, leading to the acquisition of new mutations in PIM-1, PAX-5, RhoH/TTF and c-MYC genes, is involved in transformation from FL or B-CLL to DLBCL. Eighteen sequential pairs of FL/DLBCL (n=9) and B-CLL/DLBCL (n=9) were investigated. Our findings demonstrate that acquisition of novel mutations due to aberrant somatic hypermutation was associated with DLBCL transformation in 5/9 (55.5%) cases of FL and 2/9 (22.2%) cases of B-CLL.
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