ABL1 and breast cancer: Thus, in combination with c-Abl/Arg inhibitors, doxorubicin may be effective in cancers not previously treated with this agent (e.g. melanoma), and c-Abl/Arg inhibitors may decrease doxorubicin toxicity in cancers where the drug currently is used (e.g. breast cancer) by decreasing the doxorubicin dose required for effective treatment.