Role of the EHD Family of Endocytic Recycling Regulators for TCR Recycling and T Cell Function.

Role of the EHD Family of Endocytic Recycling Regulators for TCR Recycling and T Cell Function.
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DOI:
10.4049/jimmunol.1601793
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发表时间:
2018-01-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Band H
Band H
中科院分区:
其他
文献类型:
--
作者:
Iseka FM;Goetz BT;Mushtaq I;An W;Cypher LR;Bielecki TA;Tom EC;Arya P;Bhattacharyya S;Storck MD;Semerad CL;Talmadge JE;Mosley RL;Band V;Band H

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T细胞使用内吞途径来实现关键的细胞生物学功能,包括受体更新和免疫突触的维持。一些已建立的参与者包括Rab GTP酶,SNARE复合物蛋白和其他蛋白,它们在非T细胞系统中与Eps 15同源结构域(EHD)蛋白一起发挥作用。到目前为止,EHD蛋白家族在T细胞功能中的作用仍未被探索。我们使用CD 4-Cre产生了条件性EHD 1/3/4敲除小鼠,并将其与携带髓鞘少突胶质细胞糖蛋白(MOG)特异性TCR转基因的小鼠杂交。我们发现,这些小鼠的CD 4 + T细胞在体外表现出抗原驱动的增殖和IL-2分泌减少。在体内,这些小鼠表现出实验性自身免疫性脑脊髓炎的严重程度降低。进一步的分析表明,TCR-CD 3复合物的再循环受损,导致EHD 1/3/4敲除小鼠的溶酶体靶向增加和CD 4 + T细胞表面水平降低。我们的研究揭示了EHD家族的内吞再循环调节蛋白在TCR介导的T细胞功能中的新作用。
T cells use the endocytic pathway for key cell biological functions, including receptor turnover and maintenance of the immunological synapse. Some of the established players include the Rab GTPases, the SNARE complex proteins and others, which function together with Eps15 Homology Domain-containing (EHD) proteins in non-T-cell systems. To date, the role of the EHD protein family in T-cell function remains unexplored. We generated conditional EHD1/3/4 knockout mice using CD4-Cre and crossed these with mice bearing a myelin oligodendrocyte glycoprotein (MOG)-specific TCR transgene. We found that CD4+ T-cells from these mice exhibited reduced antigen-driven proliferation and IL-2 secretion in vitro. In vivo, these mice exhibited reduced severity of experimental autoimmune encephalomyelitis. Further analyses showed that recycling of the TCR-CD3 complex was impaired, leading to increased lysosomal targeting and reduced surface levels on CD4+ T cells of EHD1/3/4 knockout mice. Our studies reveal a novel role of the EHD family of endocytic recycling regulatory proteins in TCR-mediated T-cell functions.
哺乳动物细胞和秀丽隐杆线虫中的生化和功能比较揭示了EHD蛋白的共享和不同作用。
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