Pure Communications, a corporate communications agency specializing in public relations, marketing communications and investor relations, announced the addition of three pharmaceutical/biotechnology accounts to its client roster. The clients are Acusphere, a specialty pharmaceutical company based in Watertown, MA, PTC Therapeutics, a privately-held biopharmaceutical company located in South Plainfield, NJ and Zylera Pharmaceuticals, a privately-held specialty pharmaceutical company based in Research Triangle Park, NC.