DUBLIN, Ireland & TORONTO--(BUSINESS WIRE)--Elan Corporation, plc (NYSE: ELN) and Transition Therapeutics Inc. (NASDAQ: TTHI, TSX: TTH) today announced that the first patient has been dosed in a Phase 2 clinical study of ELND005 (AZD-103) in patients with Alzheimer’s disease. The study is a randomized, double-blind, placebo-controlled, dose-ranging, safety and efficacy study in approximately 340 patients with mild to moderate Alzheimer’s disease. Approximately 65 sites in North America are expected to participate in the program.