Dive Brief:An experimental drug Fulcrum Therapeutics has been testing against a type of muscular dystrophy failed a Phase 3 trial, prompting the biotechnology company to suspend development of the program.Despite claiming to see positive signs in a previous test, Fulcrum said the drug, dubbed losmapimod, couldnt replicate those results. Losmapimod missed its main study objective, failing to meaningfully improve range of motion in people with a disease known, in short, as FSHD. The therapy also fell short on a number of secondary study goals.The results issued Thursday come only four months after Sanofi paid Fulcrum $80 million up front, and dangled another $975 million in future payments, for partial rights to losmapimod. Shares of the Massachusetts-based biotech fell roughly 60% during midday trading and were changing hands at just over $3 apiece, less than the value of its cash reserves.Dive Insight:FSHD, or facioscapulohumeral muscular dystrophy, is a neuromuscular disorder characterized by muscle weakness in the face, shoulders and arms. Its primarily caused by a genetic error that leads to overexpression of a protein called DUX4.Fulcrum has long believed blocking an enzyme involved in the production of DUX4 with losmapimod a drug GSK discovered and originally developed for a heart condition would improve outcomes. Now, though, the company is changing course to focus on its only other drug in clinical testing, a potential treatment for sickle cell disease.The Phase 3 trial that read out Thursday randomized 260 people with FSHD to receive either losmapimod or a placebo. The studys main objective was to prove treatment could lead to a benefit in reachable workspace after 48 weeks. Trial investigators also measured changes in volunteers muscle and fat levels, shoulder strength and scores on surveys evaluating quality of life and overall health.The drug missed all of those marks, according to Fulcrum, which plans to reveal full results at a future medical meeting. In the meantime, the company is turning its attention to a sickle cell drug expected to produce Phase 1 data next year.The fresh results led to a share sell-off and a flurry of stock downgrades from Wall Street analysts. In a research note issued Thursday, Stifel analyst Dae Gon Ha also expressed skepticism about the prospects of the sickle cell drug. We think it will take some time for investor sentiment to improve, he wrote.Fulcrums $274 million in cash, along with expected operational streamlining following the study setback, should give it enough money to get to key data readouts, Ha wrote. But investors may be reluctant to buy shares until there is more information on the progress of the sickle cell trial and assurances about the drugs safety, he added.Last year, the Food and Drug Administration suspended testingof that therapy for six months. '