J-mediated Translocations in Lymphoid Neoplasms : A Functional Assessment of Genomic Instability by Cryptic Sites
J-mediated Translocations in Lymphoid Neoplasms : A Functional Assessment of Genomic Instability by Cryptic Sites
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淋巴肿瘤中 J 介导的易位:隐性位点基因组不稳定性的功能评估
DOI:
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发表时间:
2001
期刊:
影响因子:
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通讯作者:
Aggggtcaggccagaatg
中科院分区:
文献类型:
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作者:
Tactggtat Agcctagatgtgtttaga;Tgagaaagga;Tgtggggtacg;Ctccag;Aaggtctctggg;Ttgcttccaagtt;Cccacagtcctctact;Tgctgtacacatcggtg;Tgggcggactggcca;Acacctggcg;Ctcctcaggt;Tgacctcagaactcatct;Aggggtcaggccagaatg
Most lymphoid malignancies are initiated by specific chromosomal translocations between immunoglobulin (Ig)/T cell receptor (TCR) gene segments and cellular proto-oncogenes. In many cases, illegitimate V(D)J recombination has been proposed to be involved in the translocation process, but this has never been functionally established. Using extra-chromosomal recombination assays, we determined the ability of several proto-oncogenes to target V(D)J recombination, and assessed the impact of their recombinogenic potential on translocation rates in vivo. Our data support the involvement of 2 distinct mechanisms: translocations involving LMO2, TAL2, and TAL1 in T cell acute lymphoblastic leukemia (T-ALL), are compatible with illegitimate V(D)J recombination between a TCR locus and a proto-oncogene locus bearing a fortuitous but functional recombination site (type 1); in contrast, translocations involving BCL1 and BCL2 in B cell non-Hodgkin’s lymphomas (B-NHL), are compatible with a process in which only the IgH locus breaks are mediated by V(D)J recombination (type 2). Most importantly, we show that the t(11;14)(p13;q32) translocation involving LMO2 is present at strikingly high frequency in normal human thymus, and that the recombinogenic potential conferred by the LMO2 cryptic site is directly predictive of the in vivo level of translocation at that locus. These findings provide new insights into the regulation forces acting upon genomic instability in B and T cell tumorigenesis.
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影响因子:
56.9
作者:
B. Tycko;James D. Palmer;J. Sklar
通讯作者:
B. Tycko;James D. Palmer;J. Sklar
DOI:
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发表时间:
1988
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Born,W;White,J;Kappler,J;Marrack,P
通讯作者:
Marrack,P
影响因子:
11.4
作者:
Williams,ME;Swerdlow,SH;Meeker,TC
通讯作者:
Meeker,TC
影响因子:
8
作者:
Tsujimoto,Y;Louie,E;Bashir,MM;Croce,CM
通讯作者:
Croce,CM
DOI:
10.1073/pnas.82.21.7439
发表时间:
1985-01-01
影响因子:
11.1
作者:
CLEARY, ML;SKLAR, J
通讯作者:
SKLAR, J