NEWTON, Mass.–(BUSINESS WIRE)–Allena Pharmaceuticals, Inc., a specialty biopharmaceutical company focused on developing and commercializing innovative, non-systemic, oral protein therapeutics to treat metabolic and orphan diseases, today announced that the U.S. Food and Drug Administration (FDA) has granted Orphan Drug Designation to Allena’s investigational therapy oxalate decarboxylase for the treatment of …