Please note that we have stopped the regular imports of Gene Expression Omnibus (GEO) data into ArrayExpress. This may not be the latest version of this experiment.
E-GEOD-42917 - CCND2 rearrangements are the most frequent genetic events in Cyclin D1-negative mantle cell lymphoma [Agilent]
Released on 19 December 2012, last updated on 4 May 2014
Cyclin D1-negative mantle cell lymphomas (MCL) are not well characterized, in part due to the difficulties in their recognition. SOX11 has been recently identified as a reliable biomarker of MCL, also expressed in the cyclin D1-negative variant. We investigated 40 lymphomas with MCL morphology and immunophenotype, negative for cyclin D1 expression/t(11;14)(q13;q32) but SOX11-positive. These tumors presented clinically with generalized lymphadenopathy, advanced stage, and had a poor outcome (5-year overall survival 48%). Chromosomal rearrangements of the CCND2 locus were detected in 55% of the cases, with an IG gene as partner in 18/22 cases, in particular with light chains (10 IGK@, 5 IGL@). No mutations in the phosphorylation motifs of CCND1, CCND2 and CCND3 were detected. The global genomic profile and the high complexity of the 32 cyclin D1-negative SOX11-positive MCL analyzed by copy number arrays were similar to the conventional cyclin D1/SOX11-positive MCL. 17p deletions and high Ki67 expression conferred a significantly worse outcome to the patients. This comprehensive characterization of a large series of cyclin D1-negative MCL indicates that these tumors are clinically and biologically similar to the conventional cyclin D1-positive MCL and provides a basis for the proper identification and clinical management of these patients. Copy number analysis of Agilent 1*1M arrays was performed for 27 MCL, with sex-matched control DNAs and without duplicates or dye-swapt.
comparative genomic hybridization by array
Sílvia Beà <email@example.com>, Itziar Salaverria, Silvia Beà
CCND2 rearrangements are the most frequent genetic events in Cyclin D1-negative mantle cell lymphoma. Salaverria I, Royo C, Carvajal-Cuenca A, Clot G, Navarro A, Valera A, Song JY, Woroniecka R, Rymkiewicz G, Klapper W, Hartmann EM, Sujobert P, Wlodarska I, Ferry JA, Gaulard P, Ott G, Rosenwald A, Lopez-Guillermo A, Quintanilla-Martinez L, Harris NL, Jaffe ES, Siebert R, Campo E, Beï¿½ S. , PMID:23255553