树突状细胞
淋巴系统
滤泡树突状细胞
细胞生物学
生物
免疫学
T细胞
抗原提呈细胞
免疫系统
作者
Kieran English,Rain Kwan,Lauren E. Holz,Claire McGuffog,Jelte M. M. Krol,Daryan Kempe,Tsuneyasu Kaisho,William R. Heath,Leszek Lisowski,Maté Biro,Geoffrey W. McCaughan,David G. Bowen,Patrick Bertolino
标识
DOI:10.1038/s41467-024-45612-5
摘要
Abstract While CD4 + T cells are a prerequisite for CD8 + T cell-mediated protection against intracellular hepatotropic pathogens, the mechanisms facilitating the transfer of CD4-help to intrahepatic CD8 + T cells are unknown. Here, we developed an experimental system to investigate cognate CD4 + and CD8 + T cell responses to a model-antigen expressed de novo in hepatocytes and reveal that after initial priming, effector CD4 + and CD8 + T cells migrate into portal tracts and peri-central vein regions of the liver where they cluster with type-1 conventional dendritic cells. These dendritic cells are locally licensed by CD4 + T cells and expand the number of CD8 + T cells in situ, resulting in larger effector and memory CD8 + T cell pools. These findings reveal that CD4 + T cells promote intrahepatic immunity by amplifying the CD8 + T cell response via peripheral licensing of hepatic type-1 conventional dendritic cells and identify intrahepatic perivascular compartments specialized in facilitating effector T cell-dendritic cell interactions.
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