According to the data of immunofluorescent staining and immunoblotting, 35–400 nM (i.e. clinically achievable) concentrations of 17AAG, NVP-AUY922, geldanamycin and radicicol caused a prominent induction of Hsp70 in the inhibitor-treated cancer cells such as MCF-7, HeLa, KTC-1, PC-3, Myc-CaP, A549 and HT 1080. The gene discussed is MYC; the disease is cancer.