Measurement of intracellular accumulation of doxorubicin by co-treating BE(2)-C neuroblastoma cells with doxorubicin and bufexamac, tubastatin A or tubacin for 48 h revealed that addition of HDAC6/10 inhibitors bufexamac and tubastatin A increased intracellular doxorubicin (Fig. 3g). The gene discussed is HDAC6; the disease is neuroblastoma.