Blood brain barrier getting in the way of brain cancer treatment? Na-no problem! A collaborative effort between the laboratories of Paula Hammond, a David H. Koch Professor in Engineering and head of MIT's Department of Chemical Engineering, Michael Yaffe, the David H. Koch Professor of Science and director of MIT's Center for Precision Cancer Medicine, and former Charles W. and Jennifer C. Johnson Clinical Investigator Scott Floyd has yielded a layered nanoparticle coated with a protein known as transferrin that can pass through the blood brain barrier to deliver a targeted one-two punch to glioblastoma tumor cells. Mice treated with these transferrin-coated nanoparticles survived for twice as long as mice that received other treatments. The work is described in Nature Communications and was supported in part by the Koch Institute Frontier Research Program, a KI Quinquennial Cancer Research Fellowship, and the Bridge Project.