Natural cytotoxicity triggering receptor 1 ligands (NKp46L)

Natural cytotoxicity triggering receptor 1 (NKp46) ligands on abnormal or tumor cells are a heterogeneous group of molecules that trigger Natural Killer (NK) cell activation upon binding to the NKp46 receptor. These ligands include endogenous proteins such as surface-exposed calreticulin, vimentin, and specific heparan sulfate proteoglycans (HSPGs), as well as exogenous viral hemagglutinins [1][2]. The interaction is a key component of the immune system's ability to recognize and eliminate stressed, infected, or malignant cells through the induction of cytotoxicity and cytokine production [3]. In the context of oncology, tumors often downregulate these ligands or shed them in soluble forms to evade immune detection, a process that correlates with poor prognosis [4]. Therapeutic development focuses on multi-specific NK cell engagers (NKCEs) that bypass natural ligand requirements by directly linking the NKp46 receptor to tumor-associated antigens [5]. Additionally, certain treatments like anthracycline chemotherapy can induce the translocation of ligands like calreticulin to the cell surface, promoting immunogenic cell death [6]. References: [1] Kruse et al. (2014) Immunol Lett; [2] Gaggero et al. (2022) Front Immunol; [3] Sivori et al. (1997) J Exp Med; [4] Glasner et al. (2012) Front Immunol; [5] Gauthier et al. (2019) Cell; [6] Obeid et al. (2007) Nat Med.

Other names

NKp46 ligandsNCR1 ligandsNatural cytotoxicity receptor 1 ligandsNKp46-LNatural killer cell p46-related ligands

Activation of Natural Killer cells through the NKp46 receptor to induce directed cytotoxicity and cytokine release against abnormal or malignant cells.