Figure 6.

5-Aza-2-deoxycytidine (5-dAzaC) recovers IFN-γ mediated HLA-class I inducibility in ESTDAB-159 melanoma cells. Cells were untreated or pretreated for 7 days with 3 μM 5-dAzaC and/then untreated or incubated with 800 U/ml IFN-γ for 48 hrs. HLA class I expression before and after treatment with 5-dAzaC was determined by flow cytometry analyzes of HLA-ABC surface expression using W6/32 monoclonal antibody (B), and by quantitative RT-PCR (A). Results of HLA-B expression are normalized against GUSB expression (HLAB/GUSB).