PTC Therapeutics shares fall after MD drug study result
PTC Theraputics Inc. shares fell in the extended session Thursday after the biotech said a muscular dystrophy treatment did not reach its primary endpoint in a late-stage clinical study. PTC shares dropped 17% to $26.49 on heavy volume. The company said a Phase 3 study of its treatment Translarna did not reach its primary endpoint of improving walking test scores in certain MD patients on a statistically significant basis.
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