Transient tissue residency and lymphatic egress define human CD56^bright NK cell homeostasis.

ABSTRACT: Human tissue-resident (TR) CD56^bright natural killer (NK) cells can be identified by expression of integrins and chemokine receptors inferred from murine studies, but many aspects of their homeostasis are unclear. Here we used an integrated approach of dynamic human, humanized mouse and non-human primate models and sampling of efferent lymph fluid to determine recirculation and TR patterns of human NK cells. By intravascular labeling, we showed that CD56^bright NK cells access tissue niches at steady state. Furthermore, in human liver transplantation, donor-derived CD56^bright NK cells represent the dominant TR NK cell population early after transplantation, but are replaced over time by infiltrating recipient NK cells that establish TR traits, a process part

SUBMITTER: Niehrs A 

PROVIDER: S-EPMC12571907 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature