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:
影响因子:
--
通讯作者:
Wu GF
中科院分区:
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
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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