A. 005 GSCs cultured for 24 hr with or without murine IFNγ (mIFNγ: 0 or 3 ng/ml), stained for PD-L1, and analyzed by flow cytometry. B. 005 GSCs infected with G47Δ-E or G47Δ-mIL12 at MOI=1 for 24 hr, stained for PD-L1, and analyzed by flow cytometry. C. Human primary (left) and recurrent (right) GSCs cultured for 24 hr, stained for PD-L1 (cyan), and analyzed by flow cytometry. Percent of PD-L1+ cells indicated in upper right. See also Figure S1.