KLRK1 and Miyoshi myopathy: revealed a significant decrease in the NK cell activating receptor such as natural cytotoxicity triggering receptor 3 (NCR3), NKG2D, 2B4, and DNAX Accessory Molecule-1 (DNAM-1) and upregulation of the inhibitory receptor programmed death 1 (PD-1) in MM patients (39).