David G. Kirsch, MD, PhD (Damon Runyon-Rachleff Innovator ‘08-‘10), and colleagues at Duke University Medical Center, Durham, reported that epidermal growth factor (EGF) speeds the recovery of blood-making hematopoietic stem cells after exposure to radiation. Mice with high levels of EGF were protected from radiation damage. EGF may be able to accelerate the recovery of the blood system in cancer patients treated with chemotherapy or radiation. The study was published in the journal Nature Medicine.