Although, NKG2D ligands on the surface of TEXs were shown to block the activating role NKG2D, one of the NKP30-ligands named BAG6 was expressed on the surface of TEXs and as a soluble molecule; it was sown that the soluble form could promote tumor cell resistance to NK-mediated cytotoxicity, whereas the exosomal form triggered NK cell activation (35). Here, KLRK1 is linked to neoplasm.