Drug from Mediterranean weed kills tumor cells in mice

Scientists at the Johns Hopkins Kimmel Cancer Center, working with Danish researchers, have developed a novel anticancer drug designed to travel -- undetected by normal cells -- through the bloodstream until activated by specific cancer proteins. The drug, made from a weedlike plant, Thapsia garganica,  has been shown to destroy cancers and their direct blood supplies, acting like a "molecular grenade," and sparing healthy blood vessels and tissues.