Platelets present antigen in the context of MHC class I.
Platelets present antigen in the context of MHC class I.
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DOI:
10.4049/jimmunol.1200580
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发表时间:
2012-07-15
期刊:
影响因子:
--
通讯作者:
Morrell CN
中科院分区:
文献类型:
--
作者:
Chapman LM;Aggrey AA;Field DJ;Srivastava K;Ture S;Yui K;Topham DJ;Baldwin WM 3rd;Morrell CN
Platelets are most recognized for their vital role as the cellular mediator of thrombosis, but platelets also have important immune functions. Platelets initiate and sustain vascular inflammation in many disease conditions, including arthritis, atherosclerosis, transplant rejection and severe malaria. We now demonstrate that platelets express T cell co-stimulatory molecules, process and present antigen in MHC class I, and directly activate naïve T cells in a platelet MHCI dependent manner. Using an experimental cerebral malaria (ECM) mouse model we also demonstrate that platelets present pathogen derived antigen to promote T cell responses in vivo, and that platelets can be used in a cell based vaccine model to induce protective immune responses. Our study demonstrates a novel antigen presentation role for platelets.
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