Figure 4. MHC I and PD-L1 expression levels remain unchanged following fludarabine treatment.

MDA-231 and 624.38mel were pre-treated with the indicated concentrations of fludarabine or DMSO prior to IFN-γ activation with 50 U/ml for 24 h. Cells were harvested for flow cytometry analysis. MFI was assessed on viable populations for A- PD-L1 and B- HLA-ABC. Error bars represent standard deviation from one experiment. Results are representative of three independent experiments.