(a) Level of transcripts for selected genes upregulated in YUMM1.7, in which Siah2 was subjected to CRISPR-CAS9 KO compared with control YUMM1.7 Siah2 WT cells. Each bar represents the means ± standard error from two experiments. *p < 0.05, **p < 0.01, were calculated using Student’s t test. (b) RNAs were extracted from YUMM1.7 cells following treatment with indicated concentration of RLS-12, RLS-24 and RLS-96 for 24 h, followed by qPCR analysis. Each bar represents the means ± standard error from two experiments. *p < 0.05, **p < 0.01, ***p < 0.001, ****p < 0.0001 were calculated using Student’s t test. (c) A375 cells were treated with single or combination of three compounds at indicated concentrations. Cell viability was assessed 72 h later using ATPlite. Each bar represents the mean ± standard deviation of three measurements. *p < 0.05, ****p < 0.0001 were calculated using Student’s t test.