The A2B adenosine receptor promotes Th17 differentiation via stimulation of dendritic cell IL-6.

The A2B adenosine receptor promotes Th17 differentiation via stimulation of dendritic cell IL-6.
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A2b腺苷受体通过刺激树突状细胞IL-6促进Th17分化。

DOI:
10.4049/jimmunol.1100117
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发表时间:
2011-06-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Ernst PB
Ernst PB
中科院分区:
其他
文献类型:
--
作者:
Wilson JM;Kurtz CC;Black SG;Ross WG;Alam MS;Linden J;Ernst PB

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腺苷是缺氧或炎症期间产生的一种内源性代谢产物。以前牵连作为抗炎介质中的CD 4 + T细胞的调节,我们报告,腺苷通过树突状细胞(DC)A2 B腺苷受体(A2 BAR),以促进Th 17细胞的发展。在存在腺苷或稳定的腺苷模拟物5′-(N-乙基羧肟)腺苷的情况下,与DC共培养的小鼠幼稚CD 4 + T细胞导致IL-17和IL-22分泌细胞的分化以及编码特征性Th 17相关分子(如IL-23 R和RORγt)的mRNA的升高。当DC从骨髓产生或从小肠固有层分离时,观察到的反应是相似的。使用拮抗剂和来自A2 BAR −/−腺苷受体或A2 AAR −/−/A2 BAR −/−小鼠的细胞进行的实验表明,DC A2 BAR促进了这种效应。以cAMP非依赖性方式刺激的IL-6是该途径中的重要介质。因此,除了先前注意到的腺苷受体对调节性T细胞发育和功能的直接作用之外,这些数据表明腺苷还间接地起调节CD 4 + T细胞分化的作用,并提出了A2 BAR的推定促炎作用的机制。
Adenosine is an endogenous metabolite produced during hypoxia or inflammation. Previously implicated as an anti-inflammatory mediator in CD4+ T cell regulation, we report that adenosine acts via dendritic cell (DC) A2B adenosine receptor (A2BAR) to promote the development of Th17 cells. Mouse naive CD4+ T cells cocultured with DCs in the presence of adenosine or the stable adenosine mimetic 5′-(N-ethylcarboximado) adenosine resulted in the differentiation of IL-17– and IL-22–secreting cells and elevation of mRNA that encode signature Th17-associated molecules, such as IL-23R and RORγt. The observed response was similar when DCs were generated from bone marrow or isolated from small intestine lamina propria. Experiments using antagonists and cells from A2BAR−/− adenosine receptor or A2AAR−/−/A2BAR−/− mice indicated that the DC A2BAR promoted the effect. IL-6, stimulated in a cAMP-independent manner, is an important mediator in this pathway. Hence, in addition to previously noted direct effects of adenosine receptors on regulatory T cell development and function, these data indicated that adenosine also acts indirectly to modulate CD4+ T cell differentiation and suggested a mechanism for putative proinflammatory effects of A2BAR.
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