Many Th Cell Subsets Have Fas Ligand-Dependent Cytotoxic Potential.
Many Th Cell Subsets Have Fas Ligand-Dependent Cytotoxic Potential.
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DOI:
10.4049/jimmunol.1700420
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发表时间:
2018-03-15
期刊:
影响因子:
--
通讯作者:
Jenkins MK
中科院分区:
文献类型:
--
作者:
Kotov DI;Kotov JA;Goldberg MF;Jenkins MK
CD4+ helper T cells can have cytotoxic activity against cells displaying relevant peptide-MHCII (p:MHCII) ligands. Cytotoxicity may be a property of Th1 cells and depend on perforin and the Eomes transcription factor. We assessed these assertions for polyclonal p:MHCII-specific CD4+ T cells activated in vivo in different contexts. Mice immunized with an immunogenic peptide in adjuvant or infected with Lymphocytic choriomeningitis virus or Listeria monocytogenes bacteria induced cytotoxic Th cells that killed B cells displaying relevant p:MHCII complexes. Cytotoxicity was dependent on Fas expression by target cells but independent of Eomes or perforin expression by T cells. Although the priming regimens induced different proportions of Th1, Th17, regulatory T cells, and T follicular helper cells, the T cells expressed Fas ligand in all cases. Reciprocally, Fas was upregulated on target cells in a p:MHCII-specific manner. These results indicate that many different Th subsets have cytotoxic potential that is enhanced by cognate induction of Fas on target cells.
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