Killer cell lectin-like receptor subfamily K member 1 (NKG2D)–Histocompatibility 60 (H60) interaction (NKG2D–H60)

The Killer cell lectin-like receptor subfamily K member 1–Histocompatibility 60 (NKG2D–H60) interaction is a pivotal immune recognition axis primarily characterized in murine models [1]. NKG2D is a type II transmembrane activating receptor found on natural killer (NK) cells, γδ T cells, and CD8+ T cells [1]. Its ligand, H60, is an MHC class I-like molecule that is upregulated in response to cellular stress, viral infection, or malignancy [2]. Upon binding, the NKG2D–H60 complex triggers intracellular signaling through the DAP10 adapter protein, resulting in the activation of cytotoxic pathways and the release of pro-inflammatory cytokines like IFN-γ [3]. Although H60 is specific to mice, it serves as a functional analog to human ligands such as MICA and MICB, making it a critical model for studying human immune responses [4]. In oncology, this interaction is targeted to enhance tumor clearance, while in autoimmune diseases, the pathway is often blocked to reduce pathological inflammation [5]. Therapeutic developments include monoclonal antibodies that antagonize the receptor and CAR-T cells engineered to express the NKG2D binding domain [6]. Understanding the regulation of this interaction is essential for overcoming immune evasion mechanisms like ligand shedding in the tumor microenvironment [7].

Other names

KLRK1–H60 interactionCD314–H60 interactionNatural killer group 2 member D–Histocompatibility 60 interactionNKG2D–H60a interactionNKG2D–H60b interactionNKG2D–H60c interaction

Antagonism of the NKG2D receptor to inhibit pro-inflammatory signaling in autoimmune diseases, and agonistic targeting or CAR-T cell engineering to promote anti-tumor cytotoxicity.