Supplementary Figures 1 through 5 from Identification of the Cell-Intrinsic and -Extrinsic Pathways Downstream of EGFR and IFNγ That Induce PD-L1 Expression in Head and Neck Cancer

Supplementary Figure 1. IFNγ-induced PD-L1 upregulation is not PI3K dependent. Supplementary Figure 2. IFNα induces pSTAT1 and HLA class I upregulation. Supplementary figure 3. A. STAT1 and STAT3 siRNA knockdown efficiency. Supplementary figure 4. EGF induces JAK2 phosphorylation. Supplementary figure 5. Knockdown efficiency of STAT1 siRNA in HNC cell lines.