Experimental Gilead drug effective in early-stage leukemia trial

By Deena Beasley (Reuters) – An experimental drug from Gilead Sciences Inc shrank tumors in half of leukemia patients whose cancer had returned, according to an early-stage trial that represents a new foray into oncology by the world’s biggest seller of HIV medications. The pill, idelalisib, is part of a new class of medications designed to selectively block a type of protein known to promote tumor growth in patients with chronic lymphocytic leukemia (CLL) and other types of blood cancer. …