Gene expression in melanoma cells following treatment with IFN-beta

To further determine the candidate genes which expressed in four melanoma cells and melanocyte after treatment with IFN-β, total RNA was extracted from melanoma cells, which have different sensitivities to IFN-β, and melanocyte after treatment with or without IFN-β at a concentration of 1,000 IU/ml for 48 h. For expression profiling, oligonucleotide microarray analysis was performed at Hokkaido System Science (Sapporo, Japan) using an Agilent Human Genomic microarray 8 × 60 K version 2.0 (Agilent Technologies, Santa Clara, CA). Then, we focused on two candidate genes, CXCL-10 and IL-24, which are associated with the sensistibity of melanoma cells to IFN-β. We examined whether CXCL10 and IL-24 directly or indirectly cause sensitivitiy of melanoma to IFN-β. total RNA was extracted from melanoma cells (A375, RPMI-7951, SK-MEL-5, and SK-MEL-1) and primary melanocyte after treatment with or without IFN-β at a concentration of 1,000 IU/ml for 48 h.