** Shares of drug developer Disc Medicine IRON.O fall
59.8% to $25 premarket
** Co says its experimental drug to treat a type of rare
genetic disorder did not meet the secondary goal of a mid-stage
study
** Says drug, bitopertin, did not meet statistical
significance in improving tolerance to sunlight due to strong
placebo performance
** The company is testing the drug to treat erythropoietic
protoporphyria that causes severe reactions when patients are
exposed to sunlight, characterized by excruciating pain and
burning sensations
** Up to last close stock up 7.8% YTD
(Reporting by Sneha S K in Bengaluru)
((Sneha.SK@thomsonreuters.com;))