BLIMP1 is a tumor suppressor gene frequently disrupted in activated B cell-like diffuse large B cell lymphoma.
BLIMP1 is a tumor suppressor gene frequently disrupted in activated B cell-like diffuse large B cell lymphoma.
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DOI:
10.1016/j.ccr.2010.10.030
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发表时间:
2010-12-14
期刊:
影响因子:
50.3
通讯作者:
Dalla-Favera R
中科院分区:
文献类型:
--
作者:
Mandelbaum J;Bhagat G;Tang H;Mo T;Brahmachary M;Shen Q;Chadburn A;Rajewsky K;Tarakhovsky A;Pasqualucci L;Dalla-Favera R
Diffuse large B cell lymphoma (DLBCL) is a heterogeneous disease composed of at least two distinct subtypes: germinal centre B cell like (GCB) and activated B cell like (ABC) DLBCL. These phenotypic subtypes segregate with largely unique genetic lesions, suggesting the involvement of different pathogenetic mechanisms. In this report, we show that the BLIMP1/PRDM1 gene is inactivated by multiple mechanisms, including homozygous deletions, truncating or missense mutations, and transcriptional repression by constitutively active BCL6, in ~53% of ABC-DLBCL. In vivo, conditional deletion of Blimp1 in mouse B cells promotes the development of lymphoproliferative disorders recapitulating critical features of the human ABC-DLBCL. These results demonstrate that BLIMP1 is a bona fide tumor suppressor gene whose loss contributes to lymphomagenesis by blocking plasma cell differentiation.
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