The origin of recurrent translocations in recombining lymphocytes: a balance between break frequency and nuclear proximity.

The origin of recurrent translocations in recombining lymphocytes: a balance between break frequency and nuclear proximity.
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重组淋巴细胞中反复易位的起源:断裂频率和核接近度之间的平衡。

DOI:
10.1016/j.ceb.2013.02.007
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发表时间:
2013
影响因子:
7.5
通讯作者:
Skok,JaneA
Skok,JaneA
中科院分区:
生物学2区
文献类型:
--
作者:
Rocha,PedroP;Skok,JaneA

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易位是通过大片非连续染色体区域的异常连接而发生的。这些非法重排的底物可能是在正常细胞过程中受到损害的结果,如转录和复制,或通过遗传毒性物质的作用。在淋巴细胞中,许多易位具有起源于程序性重组过程中引入的异常的迹象。尽管重组在不同的水平上受到严格控制,但错误可能会导致细胞遗传学异常,包括缺失、插入、扩增和易位,这是白血病和淋巴瘤的根本原因。在这篇综述中,我们集中于最近的研究,这些研究提供了在两个淋巴细胞特异性程序性重组事件:V(D)J和类开关重组(CSR)中出现的易位的起源的洞察力。
Translocations occur through the aberrant joining of large stretches of non-contiguous chromosomal regions. The substrates for these illegitimate rearrangements can arise as a result of damage incurred during normal cellular processes, such as transcription and replication, or through the action of genotoxic agents. In lymphocytes many translocations bear signs of having originated from abnormalities introduced during programmed recombination. Although recombination is tightly controlled at different levels, mistakes can occur leading to cytogenetic anomalies that include deletions, insertions, amplifications and translocations, which are an underlying cause of leukemias and lymphomas. In this review we focus on recent studies that provide insight into the origins of translocations that arise during the two lymphocyte specific programmed recombination events: V(D)J and class switch recombination (CSR).
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