To determine whether B16-F10 murine melanoma and CT26LacZ murine colon carcinoma cells expressed and/or upregulated PD-L1 in response to NDV infection, cells were exposed to NDV-GFP at a MOI of five for 6 h, after which PD-L1 expression was analyzed by flow cytometry. The gene discussed is CD274; the disease is colon carcinoma.