Cutting edge: Conditional MHC class II expression reveals a limited role for B cell antigen presentation in primary and secondary CD4 T cell responses.

Cutting edge: Conditional MHC class II expression reveals a limited role for B cell antigen presentation in primary and secondary CD4 T cell responses.
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DOI:
10.4049/jimmunol.1201598
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发表时间:
2013-07-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Wu GF
Wu GF
中科院分区:
其他
文献类型:
--
作者:
Archambault AS;Carrero JA;Barnett LG;McGee NG;Sim J;Wright JO;Raabe T;Chen P;Ding H;Allenspach EJ;Dragatsis I;Laufer TM;Wu GF

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CD 4 T细胞的活化、分化和随后的效应子功能取决于与大量表达MHCII的抗原呈递细胞(APC)的相互作用。为了评估各种APC对CD 4 T细胞功能的个体贡献,我们设计了一种新的小鼠工具,用于在APC亚群中选择性地在体内表达MHCII。使用cre-loxP方法实现MHCII在B细胞中的条件表达。在静脉内或皮下引发后,在仅通过B细胞表达MHCII的小鼠中观察到CD 4 T细胞的部分增殖和活化。如CD 4 T细胞依赖性自身免疫模型EAE所示,将MHCII表达限制于B细胞限制了体内继发性CD 4 T细胞应答。这些结果突出了在体内使用新系统通过MHCII的条件表达来研究个体APC的过程中,B细胞抗原呈递在CD 4 T细胞功能的起始和增殖期间的局限性。
The activation, differentiation and subsequent effector functions of CD4 T cells depend on interactions with a multitude of MHCII-expressing antigen presenting cells (APCs). To evaluate the individual contribution of various APCs to CD4 T cell function, we have designed a new murine tool for selective in vivo expression of MHCII in subsets of APCs. Conditional expression of MHCII in B cells was achieved using a cre-loxP approach. After intravenous or subcutaneous priming, partial proliferation and activation of CD4 T cells was observed in mice expressing MHCII only by B cells. Restricting MHCII expression to B cells constrained secondary CD4 T cell responses in vivo, as demonstrated in a CD4 T cell-dependent model of autoimmunity, EAE. These results highlight the limitations of B cell antigen presentation during initiation and propagation of CD4 T cell function in vivo using a novel system to study individual APCs by the conditional expression of MHCII.
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