Part two5 Feb 2019 15:26
Amongst more than 200 genes induced by IFN-? [82], many of those genes are the molecules involved in cancer cell immune evasion, such as PD-L1, PD-L2, CTLA-4, CIITA, non-classical MHC class Ib antigens, IDO1, CXCL12 etc. [18,19,83]. IFN-? promotes expression of PD-L1 and PD-L2 not only in tumor cells, but also in other stromal cells including immune infiltrating cells, and suppresses the effector function of tumor-specific T cells or NK cells through an interaction with an immune inhibitory receptor, PD-1 [84,85,86]. IFN-? induced PD-L1/2 expression has also been referred to as a mechanism of adaptive immune resistance to immune checkpoint therapy
well that is handled by Keytruda ... Proven at Phase 3 ...