PDCD1 and preeclampsia: Although the majority of NKT-like cells are conventional CD8+ T cells expressing NK associated receptors, the cytotoxic potential of these cells is significantly reduced in early-onset preeclampsia in contrast to healthy 3rd-trimester pregnancy, but there was no difference between the cytotoxicity of PD1+ and PD1- subpopulations in NKT-like cells.