MITF and melanoma: Contrary to our expectations, when we analyzed the effects of MITF/Mitf knockdown on the IFNγ/Ifnγ-induced PD-L1/Pd-l1 mRNA expression in additional melanoma cell lines, including two mouse melanoma cell lines (B16 and YUMM1.7) for interspecies comparison, we did not observe the same effects as seen in the 624Mel melanoma cell line.