RAGE ligation affects T cell activation and controls T cell differentiation.

RAGE ligation affects T cell activation and controls T cell differentiation.
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DOI:
10.4049/jimmunol.181.6.4272
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发表时间:
2008-09-15
影响因子:
4.4
通讯作者:
Herold, Kevan C.
Herold, Kevan C.
中科院分区:
医学2区
文献类型:
--
作者:
Chen, Yali;Akirav, Eitan M.;Chen, Wei;Henegariu, Octavian;Moser, Bernhard;Desai, Dharmesh;Shen, Jane M.;Webster, Jeffery C.;Andrews, Robert C.;Mjalli, Adnan M.;Rothlein, Robert;Schmidt, Ann Marie;Clynes, Raphael;Herold, Kevan C.

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模式识别受体 RAGE 已被证明参与适应性免疫反应,但其在这些反应的组成部分中的作用尚不清楚。我们研究了 RAGE 小分子抑制剂和受体缺失(RAGE−/− 小鼠)对参与自身免疫和同种异体移植排斥的 T 细胞反应的影响。使用小分子 RAGE 抑制剂 TTP488 治疗的 NOD 和 B6 小鼠中,同基因胰岛移植物和胰岛同种异体移植物排斥反应减少(p < 0.001)。与野生型 (WT) 小鼠相比,患有链脲佐菌素诱导的糖尿病的 RAGE−/− 小鼠表现出胰岛同种异体移植物的延迟排斥(p < 0.02)。这种体内反应与 MLR 和用 TTP488 培养的 WT T 细胞中 RAGE−/− T 细胞的增殖反应减少相关。 RAGE−/− 和 WT 细胞中,用抗 CD3 和抗 CD28 mAb 激活后的总体 T 细胞增殖相似,但 RAGE−/− T 细胞对抗 CD28 mAb 的共刺激没有反应。此外,与WT T细胞相比,抗CD3和抗CD28 mAb培养物的培养物上清液显示出更高水平的IL-10、IL-5和TNF-α,并且与WT T细胞相比,WT T细胞在TTP488存在的情况下显示出IFN-γ的产生减少,这表明RAGE可能在T细胞受试者的分化中很重要。事实上,通过实时 PCR,我们发现在 Th1 分化条件下激活的克隆 T 细胞上 RAGE mRNA 表达水平更高。我们得出结论,T 细胞上 RAGE 的激活参与了导致 Th1+ T 细胞分化的早期事件。
The pattern recognition receptor, RAGE, has been shown to be involved in adaptive immune responses but its role on the components of these responses is not well understood. We have studied the effects of a small molecule inhibitor of RAGE and the deletion of the receptor (RAGE−/− mice) on T cell responses involved in autoimmunity and allograft rejection. Syngeneic islet graft and islet allograft rejection was reduced in NOD and B6 mice treated with TTP488, a small molecule RAGE inhibitor (p < 0.001). RAGE−/− mice with streptozotocin-induced diabetes showed delayed rejection of islet allografts compared with wild type (WT) mice (p < 0.02). This response in vivo correlated with reduced proliferative responses of RAGE−/− T cells in MLRs and in WT T cells cultured with TTP488. Overall T cell proliferation following activation with anti-CD3 and anti-CD28 mAbs were similar in RAGE−/− and WT cells, but RAGE−/− T cells did not respond to co-stimulation with anti-CD28 mAb. Furthermore, culture supernatants from cultures with anti-CD3 and anti-CD28 mAbs showed higher levels of IL-10, IL-5, and TNF-α with RAGE−/− compared with WT T cells, and WT T cells showed reduced production of IFN-γ in the presence of TTP488, suggesting that RAGE may be important in the differentiation of T cell subjects. Indeed, by real-time PCR, we found higher levels of RAGE mRNA expression on clonal T cells activated under Th1 differentiating conditions. We conclude that activation of RAGE on T cells is involved in early events that lead to differentiation of Th1+ T cells.
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发表时间: 2004-07-15
影响因子: 4.4
作者:
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