Differential requirement of CD28 costimulation for activation of murine CD8+ intestinal intraepithelial lymphocyte subsets and lymph node cells.

Differential requirement of CD28 costimulation for activation of murine CD8+ intestinal intraepithelial lymphocyte subsets and lymph node cells.
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CD28 共刺激激活小鼠 CD8 肠上皮内淋巴细胞亚群和淋巴结细胞的差异要求。

DOI:
10.4049/jimmunol.155.1.76
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发表时间:
1995
影响因子:
4.4
通讯作者:
N. Liao
N. Liao
中科院分区:
医学2区
文献类型:
--
作者:
V. Gelfanov;Y. Lai;V. Gelfanova;J. Dong;J. P. Su;N. Liao

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CD 8 + CD 4-(CD 8+)鼠小肠上皮内淋巴细胞(IEL)包含两个亚群,一个表达α-CD 8同源二聚体,另一个表达α β-CD 8异源二聚体。在本研究中,将平板结合抗TCR β链(TCR-β)mAb单独或与抗CD 28 mAb联合用作模型系统,以研究这两种CD 8 + IEL亚群的活化需求。与需要TCR和CD 28触发激活的CD 8+淋巴结(LN)细胞相反,α β-CD 8 + IEL在单独用抗TCR-β mAb刺激时增殖并产生IL-2和IFN-γ,可溶性CTLA-4 IG对其应答没有影响。另一方面,即使提供两种刺激,α α-CD 8 + IEL也不产生IL-2或IFN-γ,也不增殖。然而,α α-CD 8 + IEL能够在两种CD 8 + IEL亚群中增殖,低于CD 8 + LN细胞,这导致CD 8 + IEL的反应较弱和延迟。
The CD8+CD4- (CD8+) murine small intestinal intraepithelial lymphocytes (IELs) contain two subpopulations, one expressing alpha alpha-CD8 homodimers and another alpha beta-CD8 heterodimers. In this study, plate-bound anti-TCR beta-chain (TCR-beta) mAb alone or combined with anti-CD28 mAb is used as a model system to study activation requirement of these two CD8+ IEL subsets. In contrast to CD8+ lymph node (LN) cells that require both TCR and CD28 triggering for activation, alpha beta-CD8+ IELs proliferate and produce IL-2 and IFN-gamma when stimulated with anti-TCR-beta mAb alone, and soluble CTLA-4 Ig has no effect on their responses. On the other hand, alpha alpha-CD8+ IELs neither make IL-2 or IFN-gamma nor proliferate even when both stimuli are provided. However, alpha alpha-CD8+ IELs are capable of proliferation in both CD8+ IEL subsets is lower than in CD8+ LN cells, which contributes to the weaker and delayed response of CD8+ IELs.
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