HVEM and CD160: Regulators of Immunopathology During Malaria Blood-Stage
HVEM and CD160: Regulators of Immunopathology During Malaria Blood-Stage
CD8+ T cells are key players during infection with the malaria parasite Plasmodium berghei ANKA (PbA). While they cannot provide protection against blood-stage parasites, they can cause immunopathology, thus leading to the severe manifestation of cerebral malaria. Hence, the tight control of CD8+ T cell function is key in order to prevent fatal outcomes. One major mechanism to control CD8+ T cell activation, proliferation and effector function is the integration of co-inhibitory and co-stimulatory signals. In this study, we show that one such pathway, the HVEM-CD160 axis, significantly impacts CD8+ T cell regulation and thereby the incidence of cerebral malaria. Here, we show that the co-stimulatory molecule HVEM is indeed required to maintain CD8+ T effector populations during infection. Additionally, by generating a CD160-/- mouse line, we observe that the HVEM ligand CD160 counterbalances stimulatory signals in highly activated and cytotoxic CD8+ T effector cells, thereby restricting immunopathology. Importantly, CD160 is also induced on cytotoxic CD8+ T cells during acute Plasmodium falciparum malaria in humans. In conclusion, CD160 is specifically expressed on highly activated CD8+ T effector cells that are harmful during the blood-stage of malaria.
- University of Salford United Kingdom
- Eppendorf (Germany) Germany
- University of Manchester United Kingdom
- University Medical Center Hamburg-Eppendorf Germany
- Bernhard Nocht Institute for Tropical Medicine Germany
Adult, Plasmodium berghei, Immunology, Plasmodium falciparum, Malaria, Cerebral, CD8 T cells, HVEM, CD8-Positive T-Lymphocytes, GPI-Linked Proteins, Lymphocyte Activation, co-inhibitory receptors, Mice, Antigens, CD, Animals, Humans, Receptors, Immunologic, Cells, Cultured, Aged, Cell Proliferation, RC581-607, Middle Aged, Mice, Inbred C57BL, cerebral malaria, Immunologic diseases. Allergy, CD160, Receptors, Tumor Necrosis Factor, Member 14
Adult, Plasmodium berghei, Immunology, Plasmodium falciparum, Malaria, Cerebral, CD8 T cells, HVEM, CD8-Positive T-Lymphocytes, GPI-Linked Proteins, Lymphocyte Activation, co-inhibitory receptors, Mice, Antigens, CD, Animals, Humans, Receptors, Immunologic, Cells, Cultured, Aged, Cell Proliferation, RC581-607, Middle Aged, Mice, Inbred C57BL, cerebral malaria, Immunologic diseases. Allergy, CD160, Receptors, Tumor Necrosis Factor, Member 14
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