KLRK1 and atherosclerosis: The presence of NK cells in APs has been previously reported (1, 16–18) and it has also been shown that NKG2D, a potent immune-activating receptor mainly expressed by cytotoxic lymphocytes, including NK cells, plays a role in the vicious cycle of chronic inflammation that promotes atherosclerosis, since blocking NKG2D in mice reduced inflammation and plaque progression in atherosclerotic lesions of aorta (19).