Pappas Capital Announces the Passing of…

All Patients Continued to Demonstrate Increases in Serum Phosphorus and the Majority Maintained Levels in the Normal Range

NOVATO, Calif., Sept. 15, 2014 (GLOBE NEWSWIRE) -- Ultragenyx Pharmaceutical Inc. (Nasdaq:RARE), a biopharmaceutical company focused on the development of novel products for rare and ultra-rare diseases, today announced the presentation of results from a long-term Phase 1/2 extension study, conducted by Kyowa Hakko Kirin Pharma, Inc., of the investigational fully human anti-FGF23 monoclonal antibody KRN23 (UX023) in adult patients with X-linked hypophosphatemia (XLH). The cumulative 16-month data, combining the four-month dose escalation period data from INT-001 and the 12-month extension data from INT-002, were presented at the American Society of Bone and Mineral Research (ASBMR) Annual Meeting in Houston.