Cutting edge: a T-bet-independent role for IFN-alpha/beta in regulating IL-2 secretion in human CD4+ central memory T cells.

Cutting edge: a T-bet-independent role for IFN-alpha/beta in regulating IL-2 secretion in human CD4+ central memory T cells.
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DOI:
10.4049/jimmunol.181.12.8204
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发表时间:
2008-12-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Farrar JD
Farrar JD
中科院分区:
其他
文献类型:
--
作者:
Davis AM;Ramos HJ;Davis LS;Farrar JD

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IL-2是由中央记忆CD 4 + T细胞(TCM)分泌的标志性细胞因子。虽然幼稚细胞响应抗原刺激快速分泌IL-2,但IL-12抑制子细胞中的IL-2分泌,因为它们分化为Th 1细胞。在这项研究中,我们发现了IFN-α在调节人TCM细胞分泌IL-2中的独特作用。IFN-α与IL-12协同增强分泌高水平和持续水平IL-2的细胞亚群。这些分泌IL-2的细胞显示TCM的表型和功能特征,并且能够在二次活化后产生分泌IFN-γ的效应物。T-bet参与负调节鼠T细胞中的IL-2分泌;然而,T-bet表达不抑制人TCM细胞中的IFN-α依赖性IL-2分泌。因此,我们的研究结果强调了IFN-α在调节分泌IL-2的人TCM细胞发育中的独特作用。
IL-2 is a hallmark cytokine secreted by central memory CD4+ T cells (TCM). Although naïve cells rapidly secrete IL-2 in response to antigen stimulation, IL-12 inhibits IL-2 secretion in daughter cells as they differentiate into Th1 cells. In this study, we uncover a unique role for IFN-α in regulating IL-2 secretion by human TCM cells. IFN-α synergized with IL-12 to enhance a subset of cells which secreted high and sustained levels of IL-2. These IL-2-secreting cells displayed phenotypic and functional characteristics of TCM and were capable of generating IFN-γ-secreting effectors upon secondary activation. T-bet has been implicated in negatively regulating IL-2 secretion in murine T cells; however, T-bet expression did not inhibit IFN-α-dependent IL-2 secretion in human TCM cells. Thus, our results highlight a unique role for IFN-α in regulating the development of IL-2-secreting human TCM cells.
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