MYC and cancer: We found that the double-inhibitor co-treatments did not increase amounts of the nuclear γH2AX foci in irradiated MCF-7, HeLa, KTC-1, PC-3, Myc-CaP and HT 1080 cancer cells and did not delay a disappearance of the formed foci in them as compared with the action of Hsp90 inhibitors alone (not shown).