Cytotoxic drugs or cytostatics are drugs used to destroy cancer cells. Cytotoxic drugs inhibit cell division and in this way cause cancer cells to die. But current treatments inevitably have negative consequences on healthy cells. Now scientists at Johns Hopkins Medicine and the University of Oxford say they have found a new way to kill multiplying human breast cancer cells by selectively attacking the core of their cell division machinery. The method, only tested on lab-grown and patient-derived cancer cells, could advance efforts to find drugs that kill breast cancer cells in a subset of patients.