Downregulation of cell adhesion molecules LFA-3 and ICAM-1 in Epstein-Barr virus-positive Burkitt's lymphoma underlies tumor cell escape from virus-specific T cell surveillance.

Downregulation of cell adhesion molecules LFA-3 and ICAM-1 in Epstein-Barr virus-positive Burkitt's lymphoma underlies tumor cell escape from virus-specific T cell surveillance.
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Epstein-Barr病毒阳性伯基特淋巴瘤中细胞粘附分子LFA-3和ICAM-1的下调是肿瘤细胞从病毒特异性T细胞监测中逃脱而来的。

DOI:
10.1084/jem.167.6.1811
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发表时间:
1988-06-01
影响因子:
15.3
通讯作者:
RICKINSON, AB
RICKINSON, AB
中科院分区:
医学1区
文献类型:
--
作者:
GREGORY, CD;MURRAY, RJ;EDWARDS, CF;RICKINSON, AB

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一些 EBV+ BL 细胞系在体外传代时继续以单细胞形式生长,显示 EBV 潜伏基因的表达异常受限,并保留 BL 活检样细胞表面表型(I/II 组细胞系);其他细胞则转变为聚集体生长,显示出更广泛的病毒潜伏基因表达模式,并形成更具有 EBV 转化的 LCL(III 组细胞系)特征的细胞表面表型。在这里,我们发现细胞表面粘附分子 LFA-1、ICAM-1 和 LFA-3 在 I/II 组细胞系中以非常低的水平(如果有的话)表达,并且随着 BL 细胞系向 III 组移动而协同上调。聚集体生长的变化反映了 LFA-1 和 ICAM-1 的可用性不断增加,这两种配体的相互作用是体外同型 BL 细胞粘附的基础。 I/II 组 BL 细胞系上低水平的 ICAM-1 和 LFA-3 也与效应器/靶标结合的抗原非依赖性阶段中与 EBV 特异性 CTL 相互作用的能力受损有关。 mAb 阻断研究表明,与 I/II 组 BL 靶标形成的少量缀合物涉及 LFA-1/ICAM-1 粘附途径,但不涉及 LFA-3 途径;相反,这两种途径都有助于 III 组 BL 或 LCL 靶标显示的有效缀合物形成。早期的工作确定了 III 组细胞系 WW1 BL 是不寻常的,因为它表达全谱 EBV 潜伏蛋白,但对 EBV 特异性 CTL 的裂解不敏感。在这里,我们表明该细胞系具有异常的粘附分子表达模式,在缺乏可检测到的 LFA-3 的情况下,具有高水平的 LFA-1 和 ICAM-1。 WW1 BL 细胞通过 LFA-1/ICAM-1 途径与 EBV 特异性 CTL 形成缀合物,但在缺乏目标 LFA-3/效应子 CD2 相互作用的情况下,这些缀合物不会实现靶细胞裂解。这可能反映了目标 LFA-3 分子在激活 EBV 特异性 CTL 功能中的重要作用。从这些体外研究中,我们推测 EBV+ BL 上粘附分子 LFA-3 和 ICAM-1 的下调是恶性克隆逃避 EBV 特异性 T 细胞体内监视的能力的基础。
Some EBV+ BL cell lines continue to grow as single cells on in vitro passage, show an unusually restricted expression of EBV-latent genes and retain a BL biopsy-like cell surface phenotype (group I/II lines); others change to growth in aggregates, show a broader pattern of virus latent gene expression, and develop a cell surface phenotype more characteristic of EBV-transformed LCL (group III lines). Here we show that the cell surface adhesion molecules LFA-1, ICAM-1, and LFA-3 are expressed at very low levels, if at all, on group I/II lines and are coordinately upregulated as BL lines move towards group III. The change to growth in aggregates reflects the increasing availability of LFA-1 and ICAM-1, the two ligands whose mutual interaction underlies homotypic BL cell adhesion in vitro. The low levels of ICAM-1 and LFA-3 on group I/II BL cell lines are also associated with an impaired ability to interact with EBV-specific CTL in the antigen-independent phase of effector/target conjugation. mAb blocking studies show that the small number of conjugates that are formed with group I/II BL targets involve the LFA-1/ICAM-1 adhesion pathway but not the LFA-3 pathway; in contrast, both pathways contribute to the efficient conjugate formation shown by group III BL or LCL targets. Earlier work identified one group III line, WW1 BL, as unusual since is expressed the full spectrum of EBV-latent proteins yet remained insensitive to lysis by EBV-specific CTL. Here we show that this line has an anomalous pattern of adhesion molecule expression with high levels of LFA-1 and ICAM-1 in the absence of detectable LFA-3. The WW1 BL cells form conjugates with EBV-specific CTL through the LFA-1/ICAM-1 pathway, but in the absence of a target LFA-3/effector CD2 interaction these conjugates do not achieve target cell lysis. This may reflect an important role for target LFA-3 molecules in activating EBV-specific CTL function. From these in vitro studies, we postulate that downregulation of the adhesion molecules LFA-3 and ICAM-1 on EBV+ BL underlies the ability of the malignant clone to evade EBV-specific T cell surveillance in vivo.
DOI: 10.1002/eji.1830130305
发表时间: 1983-01-01
影响因子: 5.4
作者:
HILDRETH, JEK;GOTCH, FM;MCMICHAEL, AJ
通讯作者: MCMICHAEL, AJ
DOI: 10.1128/jvi.62.3.894-901.1988
发表时间: 1988-03-01
影响因子: 5.4
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DOI: 10.1073/pnas.79.23.7489
发表时间: 1982-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
SANCHEZMADRID, F;KRENSKY, AM;SPRINGER, TA
通讯作者: SPRINGER, TA
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发表时间: 1978-01-01
期刊: CELL
影响因子: 64.5
作者:
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通讯作者: ZIEGLER, A
DOI: 10.1002/j.1460-2075.1987.tb02568.x
发表时间: 1987-09-01
期刊: EMBO JOURNAL
影响因子: 11.4
作者:
ROWE, M;ROWE, DT;RICKINSON, AB
通讯作者: RICKINSON, AB