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Title: CCND2 and CCND3 hijack immunoglobulin light chain enhancers in cyclin D1-negative mantle cell lymphoma
Author: Martín García, David
Navarro López, Alba
Valdés Mas, Rafael
Clot, Guillem
Gutiérrez-Abril, Jesús
Prieto, Miriam
Ribera Cortada, Inmaculada
Woroniecka, Renata
Rymkiewicz, Grzegorz
Bens, Susanne
Leval, Laurence de
Rosenwald, Andreas
Ferry, Judith A.
Hsi, Eric D.
Fu, Kai
Delabie, Jan
Weisenburger, Dennis D.
Jong, Daphne de
Climent, Fina
O'Connor, Sheila J.
Swerdlow, Steven H.
Torrents Arenales, David
Beltran i Agulló, Sergi
Espinet Solà, Blanca
González Farré, Blanca
Veloza, Luis
Costa, Dolors
Matutes, Estella
Siebert, Reiner
Ott, German
Quintanilla Martinez, Leticia
Jaffe, Elaine S.
López-Otin, Carlos
Salaverria Frigola, Itziar
Puente, Xose S.
Campo Güerri, Elias
Beà Bobet, Sílvia M.
Keywords: Limfomes
Pronòstic mèdic
Issue Date: 28-Feb-2019
Publisher: American Society of Hematology
Abstract: Mantle cell lymphoma (MCL) is characterized by the t(11;14)(q13;q32) translocation resulting in overexpression of cyclin D1. However, a small subset of cyclin D1− MCL has been recognized, and approximately one-half of them harbor CCND2 translocations while the primary event in cyclin D1−/D2− MCL remains elusive. To identify other potential mechanisms driving MCL pathogenesis, we investigated 56 cyclin D1−/SOX11+ MCL by fluorescence in situ hybridization (FISH), whole-genome/exome sequencing, and gene-expression and copy-number arrays. FISH with break-apart probes identified CCND2 rearrangements in 39 cases (70%) but not CCND3 rearrangements. We analyzed 3 of these negative cases by whole-genome/exome sequencing and identified IGK (n = 2) and IGL (n = 1) enhancer hijackings near CCND3 that were associated with cyclin D3 overexpression. By specific FISH probes, including the IGK enhancer region, we detected 10 additional cryptic IGK juxtapositions to CCND3 (6 cases) and CCND2 (4 cases) in MCL that overexpressed, respectively, these cyclins. A minor subset of 4 cyclin D1− MCL cases lacked cyclin D rearrangements and showed upregulation of CCNE1 and CCNE2. These cases had blastoid morphology, high genomic complexity, and CDKN2A and RB1 deletions. Both genomic and gene-expression profiles of cyclin D1− MCL cases were indistinguishable from cyclin D1+ MCL. In conclusion, virtually all cyclin D1− MCLs carry CCND2/CCND3 rearrangements with immunoglobulin genes, including a novel IGK/L enhancer hijacking mechanism. A subset of cyclin D1−/D2−/D3− MCL with aggressive features has cyclin E dysregulation. Specific FISH probes may allow the molecular identification and diagnosis of cyclin D1− MCL.
Note: Versió postprint del document publicat a:
It is part of: Blood, 2019, vol. 133, num. 9, p. 940-951
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ISSN: 0006-4971
Appears in Collections:Articles publicats en revistes (Fonaments Clínics)
Articles publicats en revistes (Institut d'lnvestigació Biomèdica de Bellvitge (IDIBELL))
Articles publicats en revistes (IDIBAPS: Institut d'investigacions Biomèdiques August Pi i Sunyer)

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