NKp44/HLA-DP-dependent regulation of CD8 effector T cells by NK cells.

ABSTRACT: Although natural killer (NK) cells are recognized for their modulation of immune responses, the mechanisms by which human NK cells mediate immune regulation are unclear. Here, we report that expression of human leukocyte antigen (HLA)-DP, a ligand for the activating NK cell receptor NKp44, is significantly upregulated on CD8⁺ effector T cells, in particular in human cytomegalovirus (HCMV)⁺ individuals. HLA-DP⁺ CD8⁺ T cells expressing NKp44-binding HLA-DP antigens activate NKp44⁺ NK cells, while HLA-DP⁺ CD8⁺ T cells not expressing NKp44-binding HLA-DP antigens do not. In line with this, frequencies of HLA-DP⁺ CD8⁺ T cells are increased in individuals not encoding for NKp44-binding HLA-DP haplo

SUBMITTER: Padoan B 

PROVIDER: S-EPMC11416720 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature