CD2 and colorectal cancer: Circulating (PB1, PB2, PB3, PB5, and PB6) and intestinal (CD1, CD2, CD3, and NUN) iNKT cells were coincubated with five colorectal cancer cell lines at different effector : target ratios for in vitro cytotoxicity evaluation by measuring lactate dehydrogenase release (Fig 1A).