BST2 and systemic lupus erythematosus: Interestingly, CD317 (BST2; tetherin), a molecule is known to be induced by type I IFNs also presented higher expression on pDCs of SLE patients (P < 0.05); however, its ligand ILT7 (CD85g) appeared to be downregulated on pDCs of SLE patients (P < 0.05).