Oncogenesis of T-ALL and nonmalignant consequences of overexpressing intracellular NOTCH1.
Oncogenesis of T-ALL and nonmalignant consequences of overexpressing intracellular NOTCH1.
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DOI:
10.1084/jem.20081561
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发表时间:
2008-11-24
影响因子:
15.3
通讯作者:
von Boehmer, Harald
中科院分区:
文献类型:
--
作者:
Li, Xiaoyu;Gounari, Fotini;Protopopov, Alexei;Khazaie, Khashayarsha;von Boehmer, Harald
Mutations resulting in overexpression of intracellular Notch1 (ICN1) are frequently observed in human T cell acute lymphoblastic leukemia (T-ALL). We have determined the consequences of ICN1 overexpression from retroviral vectors introduced into bone marrow cells. Early consequences are the generation of polyclonal nontumorigenic CD4+8+ T cell receptor (TCR)-αβ+ cells that do not qualify as tumor precursors despite the observation that they overexpress Notch 1 and c-Myc and degrade the tumor suppressor E2A by posttranslational modification. The first tumorigenic cells are detected among more immature CD4−8+TCR-αβ− cells that give rise to monoclonal tumors with a single, unique TCR-β chain and diverse TCR-α chains, pinpointing malignant transformation to a stage after pre-TCR signaling and before completion of TCR-α rearrangement. In T-ALL, E2A deficiency is accompanied by further transcriptional up-regulation of c-Myc and concomitant dysregulation of the c-Myc-p53 axis at the transcriptional level. Even though the tumors consist of phenotypically heterogeneous cells, no evidence for tumor stem cells was found. As judged by array-based comparative genomic hybridization (array CGH) and spectral karyotype (SKY) analysis, none of the tumors arise because of genomic instability.
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DOI:
10.1073/pnas.0606108103
发表时间:
2006-11-28
影响因子:
11.1
作者:
Palomero, Teresa;Lim, Wei Keat;Ferrando, Adolfo A.
通讯作者:
Ferrando, Adolfo A.
DOI:
10.1084/jem.20070876
发表时间:
2007-08-06
期刊:
The Journal of experimental medicine
影响因子:
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作者:
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通讯作者:
Look AT
影响因子:
30.5
作者:
Aifantis, I;Borowski, C;von Boehmer, H
通讯作者:
von Boehmer, H
影响因子:
5.3
作者:
Bain, G;Enel, I;Murre, C
通讯作者:
Murre, C
影响因子:
20.3
作者:
Campese, Antonio F.;Garbe, Annette I.;von Boehmer, Harald
通讯作者:
von Boehmer, Harald