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
Dalla-Favera R
中科院分区:
医学1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

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弥漫性大B细胞淋巴瘤(DLBCL)是一种异质性疾病,由至少两种不同的亚型组成:生发中心B细胞样(GCB)和活化B细胞样(ABC)DLBCL。这些表型亚型分离,在很大程度上独特的遗传病变,表明不同的发病机制的参与。在这份报告中,我们发现BLIMP 1/PRDM 1基因被多种机制灭活,包括纯合性缺失,截短或错义突变,以及组成型活性BCL 6的转录抑制,约53%的ABC-DLBCL。在体内,小鼠B细胞中Blimp 1的条件性缺失促进了淋巴增生性疾病的发展,重现了人ABC-DLBCL的关键特征。这些结果表明,BLIMP 1是一个真正的肿瘤抑制基因,其损失有助于通过阻断浆细胞分化淋巴瘤的发生。
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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