EBV Infection of Human B Lymphocytes Leads to Down-Regulation of Bim Expression: Relationship to Resistance to Apoptosis1

EBV Infection of Human B Lymphocytes Leads to Down-Regulation of Bim Expression: Relationship to Resistance to Apoptosis1
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人 B 淋巴细胞的 EBV 感染导致 Bim 表达下调:与细胞凋亡抵抗的关系1

DOI:
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发表时间:
2005
影响因子:
4.4
通讯作者:
A. Vazquez
A. Vazquez
中科院分区:
医学2区
文献类型:
--
作者:
C. Clybouw;B. Mchichi;S. Mouhamad;M. Auffredou;M. Bourgeade;Surendra Sharma;G. Leca;A. Vazquez

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EBV感染了世界上很大一部分人群,是人类B淋巴细胞嗜性的主要病毒之一。它能使人B淋巴细胞永生并控制其对凋亡的抵抗。EBV感染与几种淋巴瘤有关,包括伯基特淋巴瘤。在本报告中,我们发现EBV感染导致凋亡前蛋白Bim的转录后下调表达。这个过程包括组成型ebv激活的激酶ERK1/2对BimEL的磷酸化,然后通过蛋白酶体途径降解。我们还发现BimEL在ebv阳性Burkitt淋巴瘤细胞中的异位表达可以增强这些细胞对血清剥夺依赖性凋亡的敏感性。因此,ebv介导的人B淋巴细胞对生长因子剥夺的抗性依赖于BimEL的表达。我们的数据表明,这一调控途径是EBV致癌潜能的重要贡献者。
EBV infects a large proportion of the human population worldwide and is one of the major viruses with human B lymphocyte tropism. It can immortalize human B lymphocytes and controls their resistance to apoptosis. EBV infection is associated with several lymphomas, including Burkitt’s lymphoma. In this report we show that EBV infection leads to the post-transcriptional down-regulation of expression of the proapoptotic protein Bim. This process involves the phosphorylation of BimEL by the constitutive EBV-activated kinase ERK1/2, followed by its degradation through the proteasome pathway. We also show that ectopic expression of BimEL in EBV-positive Burkitt’s lymphoma cells can enhance the sensitivity of these cells to serum deprivation-dependent apoptosis. Thus, EBV-mediated resistance to growth factor deprivation in human B lymphocytes is dependent on BimEL expression. Our data suggest that this regulatory pathway is an important contributor to the oncogenic potential of EBV.
DOI: 10.1126/science.286.5445.1735
发表时间: 1999-11-26
期刊: SCIENCE
影响因子: 56.9
作者:
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DOI: --
发表时间: 1995
期刊: Journal of immunology (Baltimore, Md. : 1950)
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DOI: --
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