a Two-sided Pearson’s correlation between the effects (i.e., normalized growth rates) of Kdm1a inhibitor SP2509 (at 1 μM), Jmj-KDM inhibitor JIB-04 (at 200 nM), BET inhibitors OTX015 (at 200 nM), and I-BET762 (at 1 μM), used individually or in combination with vemurafenib (at 100 nM) plus trametinib (at 10 nM) and evaluated across 16 BRAF-mutant melanoma cell lines. b Log2-normalized changes in live cell count following exposure of seven selected melanoma cell lines and non-transformed primary melanocytes to different drugs at indicated doses for a period of 5 days. MMACSF, WM115, and WM902B cell lines represent cell lines that exhibit high sensitivity to the combination of JIB-04 or BET inhibitors with Braf/Mek inhibitors, while being resistant to SP2509. A2058, A375, and A375(NRASQ61K) represent cell lines that are highly sensitive to SP2509. HS294T cells show partial sensitivity to either of the compounds. Data are presented as the average of n = 6 biologically independent samples (in case of MMACSF, WM115, HS294T, A2058, A375, A375(NRASQ61K) and primary melanocytes), or the average of n = 2 biologically independent samples (in case of WM902B). c Measurements of normalized growth rate (left) and deviation from Bliss independence (DBI) values computed across diverse epigenetic inhibitor treatments in combination with vemurafenib plus trametinib. Experimental conditions and the analysis approach are the same as in Fig. 3. d Log2-normalized changes in live cell count following exposure of three selected melanoma cell lines to different drugs at indicated doses for a period of 20 days. Data are presented as mean values ± s.d. across n = 4 biologically independent samples. Source data are provided as a Source data file.