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Clonal Vγ6⁺Vδ4⁺ T cells promote IL-17–mediated immunity against Staphylococcus aureus skin infectionMarchitto, Mark C.; Dillen, Carly A.; Liu, Haiyun; Miller, Robert J.; Archer, Nathan K.; Ortines, Roger V.; Alphonse, Martin P.; Marusina, Alina I.; Merleev, Alexander A.; Wang, Yu; Pinsker, Bret L.; Byrd, Angel S.; Brown, Isabelle D.; Ravipati, Advaitaa; Zhang, Emily; Cai, Shuting S.; Limjunyawong, Nathachit; Dong, Xinzhong; Yeaman, Michael R.; Simon, Scott I.; Shen, Wei; Durum, Scott K.; O’Brien, Rebecca L.; Maverakis, Emanual; Miller, Lloyd S.
Proceedings of the National Academy of Sciences - PNAS, 05/2019, Letnik: 116, Številka: 22Journal Article
T cell cytokines contribute to immunity against Staphylococcus aureus, but the predominant T cell subsets involved are unclear. In an S. aureus skin infection mouse model, we found that the IL- 17 response was mediated by γδ T cells, which trafficked from lymph nodes to the infected skin to induce neutrophil recruitment, proinflammatory cytokines IL-1α, IL-1β, and TNF, and host defense peptides. RNA-seq for TRG and TRD sequences in lymph nodes and skin revealed a single clonotypic expansion of the encoded complementarity-determining region 3 amino acid sequence, which could be generated by canonical nucleotide sequences of TRGV5 or TRGV6 and TRDV4. However, only TRGV6 and TRDV4 but not TRGV5 sequences expanded. Finally, Vγ6⁺ T cells were a predominant γδ T cell subset that produced IL-17A as well as IL-22, TNF, and IFNγ, indicating a broad and substantial role for clonal Vγ6⁺Vδ4⁺ T cells in immunity against S. aureus skin infections.
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