Since the RNAseq analysis after treatment for either 24 or 48 h (Additional file 1: Figure S4A and S4B) suggested a potential role of DNA damage response (DDR) in the anti-tumor activity of the regimen combining chidamide and MI-3, qPCR analysis was performed to validate expression of SULT1A3 as representative. Here, MITF is linked to neoplasm.