PMID- 31036580 OWN - NLM STAT- MEDLINE DCOM- 20191218 LR - 20200309 IS - 1526-632X (Electronic) IS - 0028-3878 (Print) IS - 0028-3878 (Linking) VI - 92 IP - 18 DP - 2019 Apr 30 TI - A phase 3 randomized study evaluating sialic acid extended-release for GNE myopathy. PG - e2109-e2117 LID - 10.1212/WNL.0000000000006932 [doi] AB - OBJECTIVE: To investigate the efficacy and safety of aceneuramic acid extended-release (Ace-ER), a treatment intended to replace deficient sialic acid, in patients with GNE myopathy. METHODS: UX001-CL301 was a phase 3, double-blind, placebo-controlled, randomized, international study evaluating the efficacy and safety of Ace-ER in patients with GNE myopathy. Participants who could walk >/=200 meters in a 6-minute walk test at screening were randomized 1:1, and stratified by sex, to receive Ace-ER 6 g/d or placebo for 48 weeks and assessed every 8 weeks. The primary endpoint was change in muscle strength over 48 weeks measured by upper extremity composite (UEC) score. Key secondary endpoints included change in lower extremity composite (LEC) score, knee extensor strength, and GNE myopathy-Functional Activity Scale (GNEM-FAS) mobility domain score. Safety assessments included adverse events (AEs), vital signs, and clinical laboratory results. RESULTS: Eighty-nine patients were randomized (Ace-ER n = 45; placebo n = 44). Change from baseline to week 48 for UEC score between treatments did not differ (least square mean [LSM] Ace-ER -2.25 kg vs placebo -2.99 kg; LSM difference confidence interval [CI] 0.74 [-1.61 to 3.09]; p = 0.5387). At week 48, there was no significant difference between treatments for the change in key secondary endpoints: LEC LSM difference (CI) -1.49 (-5.83 to 2.86); knee extension strength -0.40 (-2.38 to 1.58); and GNEM-FAS mobility domain score -0.72 (-2.01 to 0.57). Gastrointestinal events were the most common AEs. CONCLUSIONS: Ace-ER was not superior to placebo in improving muscle strength and function in patients with GNE myopathy. CLASSIFICATION OF EVIDENCE: This study provides Class I evidence that for patients with GNE myopathy, Ace-ER does not improve muscle strength compared to placebo. CI - Copyright (c) 2019 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology. FAU - Lochmuller, Hanns AU - Lochmuller H AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. hanns.lochmuller@gmail.com. FAU - Behin, Anthony AU - Behin A AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Caraco, Yoseph AU - Caraco Y AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Lau, Heather AU - Lau H AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Mirabella, Massimiliano AU - Mirabella M AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Tournev, Ivailo AU - Tournev I AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Tarnopolsky, Mark AU - Tarnopolsky M AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Pogoryelova, Oksana AU - Pogoryelova O AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Woods, Catherine AU - Woods C AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Lai, Alexander AU - Lai A AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Shah, Jinay AU - Shah J AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Koutsoukos, Tony AU - Koutsoukos T AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Skrinar, Alison AU - Skrinar A AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Mansbach, Hank AU - Mansbach H AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Kakkis, Emil AU - Kakkis E AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. FAU - Mozaffar, Tahseen AU - Mozaffar T AD - From the Institute of Genetic Medicine (H.L., O.P.), Newcastle University, Newcastle upon Tyne, UK; Children's Hospital of Eastern Ontario Research Institute (H.L.), University of Ottawa; Division of Neurology, Department of Medicine (H.L.), The Ottawa Hospital, Canada; APHP (A.B.), Centre de Reference de Pathologie Neuromusculaire, Institut de Myologie, Groupe Hospitalier Pitie-Salpetriere, Paris, France; Hadassah Clinical Research Center (Y.C.), Hadassah-Hebrew University Medical Center, Jerusalem, Israel; Department of Neurology, Division of Neurogenetics (H.L.), NYU School of Medicine, New York, NY; Fondazione Policlinico Universitario A. Gemelli IRCCS (M.M.), Catholic University, Rome, Italy; Expert Center of Genetic Neurologic and Metabolic Disorders (I.T.), University Hospital Aleksandrovska, Sofia; Department of Neurology (I.T.), Medical University Sofia; Department of Cognitive Science and Psychology (I.T.), New Bulgarian University, Sofia, Bulgaria; Department of Pediatrics, Neuromuscular and Neurometabolic Clinic (M.T.), McMaster University Medical Center, Hamilton, Canada; Ultragenyx Pharmaceutical Inc. (C.W., A.L., J.S., T.K., A.S., H.M., E.K.), Novato, CA; and University of California Irvine (T.M.), Orange. H.L. is currently affiliated with the Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Germany. LA - eng GR - UL1 TR001414/TR/NCATS NIH HHS/United States PT - Clinical Trial, Phase III PT - Journal Article PT - Multicenter Study PT - Randomized Controlled Trial PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20190125 PL - United States TA - Neurology JT - Neurology JID - 0401060 RN - 0 (Delayed-Action Preparations) RN - GZP2782OP0 (N-Acetylneuraminic Acid) RN - Distal myopathy, Nonaka type SB - IM MH - Adult MH - Delayed-Action Preparations/administration & dosage/therapeutic use MH - Distal Myopathies/*drug therapy MH - Double-Blind Method MH - Female MH - Humans MH - Male MH - Middle Aged MH - Muscle Strength/*drug effects MH - Muscle, Skeletal/*drug effects MH - N-Acetylneuraminic Acid/administration & dosage/*therapeutic use MH - Treatment Outcome MH - Young Adult PMC - PMC6512882 EDAT- 2019/05/01 06:00 MHDA- 2019/12/19 06:00 PMCR- 2019/04/30 CRDT- 2019/05/01 06:00 PHST- 2018/07/25 00:00 [received] PHST- 2018/11/20 00:00 [accepted] PHST- 2019/05/01 06:00 [entrez] PHST- 2019/05/01 06:00 [pubmed] PHST- 2019/12/19 06:00 [medline] PHST- 2019/04/30 00:00 [pmc-release] AID - WNL.0000000000006932 [pii] AID - NEUROLOGY2018923904 [pii] AID - 10.1212/WNL.0000000000006932 [doi] PST - ppublish SO - Neurology. 2019 Apr 30;92(18):e2109-e2117. doi: 10.1212/WNL.0000000000006932. Epub 2019 Jan 25.