Tumor Cell Membrane Antigen (via Natural Killer Cell Recognition)

Tumor cell membrane antigens recognized by natural killer (NK) cells are a diverse set of stress-induced or altered self-molecules expressed on the surface of transformed cells. These antigens serve as ligands for activating and inhibitory receptors on NK cells, dictating the balance between NK cell activation and tolerance towards tumor cells. Key examples include NKG2D ligands (MICA/B, ULBPs), NCR ligands (NKp30, NKp44, NKp46 ligands), and downregulation/loss of HLA class I molecules. Therapeutic strategies aim to enhance ligand expression for activating receptors or block inhibitory pathways, boosting anti-tumor NK cell activity.

Other names

NKG2D ligandsMICA/BULBP family proteinsNatural cytotoxicity receptor (NCR) ligandsNKp30 ligandsNKp44 ligandsNKp46 ligandsHLA class I molecules (downregulation/loss)Stress-induced antigens

Enhance ligand expression for activating receptors or block inhibitory pathways to boost anti-tumor activity mediated through the NK cell axis.