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Mütze U, Gleich F, Garbade SF, Plisson C, Aldámiz-Echevarría L, Arrieta F, Ballhausen D, Zielonka M, Petković Ramadža D, Baumgartner MR, Cano A, García Jiménez MC, Dionisi-Vici C, Ješina P, Blom HJ, Couce ML, Meavilla Olivas S, Mention K, Mochel F, Morris AAM, Mundy H, Redonnet-Vernhet I, Santra S, Schiff M, Servais A, Vitoria I, Huemer M, Kožich V, Kölker S. Postauthorization safety study of betaine anhydrous. J Inherit Metab Dis 2022; 45:719-733. [PMID: 35358327 DOI: 10.1002/jimd.12499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 03/25/2022] [Accepted: 03/29/2022] [Indexed: 11/06/2022]
Abstract
Patient registries for rare diseases enable systematic data collection and can also be used to facilitate postauthorization safety studies (PASS) for orphan drugs. This study evaluates the PASS for betaine anhydrous (Cystadane), conducted as public private partnership (PPP) between the European network and registry for homocystinurias and methylation defects and the marketing authorization holder (MAH). Data were prospectively collected, 2013-2016, in a noninterventional, international, multicenter, registry study. Putative adverse and severe adverse events were reported to the MAH's pharmacovigilance. In total, 130 individuals with vitamin B6 nonresponsive (N = 54) and partially responsive (N = 7) cystathionine beta-synthase (CBS) deficiency, as well as 5,10-methylenetetrahydrofolate reductase (MTHFR; N = 21) deficiency and cobalamin C (N = 48) disease were included. Median (range) duration of treatment with betaine anhydrous was 6.8 (0-9.8) years. The prescribed betaine dose exceeded the recommended maximum (6 g/day) in 49% of individuals older than 10 years because of continued dose adaptation to weight; however, with disease-specific differences (minimum: 31% in B6 nonresponsive CBS deficiency, maximum: 67% in MTHFR deficiency). Despite dose escalation no new or potential risk was identified. Combined disease-specific treatment decreased mean ± SD total plasma homocysteine concentrations from 203 ± 116 to 81 ± 51 μmol/L (p < 0.0001), except in MTHFR deficiency. Recommendations for betaine anhydrous dosage were revised for individuals ≥ 10 years. PPPs between MAH and international scientific consortia can be considered a reliable model for implementing a PASS, reutilizing well-established structures and avoiding data duplication and fragmentation.
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Affiliation(s)
- Ulrike Mütze
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital, Heidelberg, Germany
| | - Florian Gleich
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital, Heidelberg, Germany
| | - Sven F Garbade
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital, Heidelberg, Germany
| | | | | | - Francisco Arrieta
- Endocrinology & Nutrition, Metabolic Congenital Disease, H.U. Ramon y Cajal, Madrid, Spain
| | - Diana Ballhausen
- Pediatric Unit for Metabolic Diseases, Woman-Mother-Child Department, Lausanne University Hospital, Lausanne, Switzerland
| | - Matthias Zielonka
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital, Heidelberg, Germany
| | - Danijela Petković Ramadža
- Department of Pediatrics, University Hospital Centre Zagreb and University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Matthias R Baumgartner
- Division of Metabolism and Children's Research Center, University Children's Hospital, University of Zurich, Zurich, Switzerland
| | - Aline Cano
- Centre de Référence des Maladies Héréditaires du Métabolisme, CHU La Timone Enfants, Marseille, France
| | | | - Carlo Dionisi-Vici
- Division of Metabolism, Bambino Gesù Children's Hospital IRCCS, Rome, Italy
| | - Pavel Ješina
- Department of Pediatrics and Inherited Metabolic Disorders, Charles University-First Faculty of Medicine and General University Hospital, Prague, Czech Republic
| | - Henk J Blom
- Department of Clinical Genetics, Center for Lysosomal and Metabolic Diseases, Erasmus Medical Center, Rotterdam, Netherlands
| | - Maria Luz Couce
- Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Service of Neonatology, Department of Pediatrics, Hospital Clínico Universitario de Santiago, CIBERER, Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - Silvia Meavilla Olivas
- Pediatrics, Gastroenterology, Hepatology and Nutrition, Hospital Sant Joan de Déu, Barcelona, Spain
| | - Karine Mention
- Centre de Référence des Maladies Héréditaires du Métabolisme, Hôpital Jeanne de Flandre, Lille, France
| | - Fanny Mochel
- Ap.HP, Sorbonne University, Reference Center for Adult Neurometabolic Diseases, La Pitié-Salpêtrière University Hospital, Paris, France
| | - Andrew A M Morris
- Alder Hey Children's NHS Foundation Trust, Liverpool, UK
- Manchester Centre for Genomic Medicine, Manchester University Hospitals NHS Trust, Manchester, UK
| | - Helen Mundy
- Evelina London Children's Hospital, London, UK
| | - Isabelle Redonnet-Vernhet
- Endocrinology, Nutrition and Metabolic Diseases, Haut-Lévêque Hospital, Bordeaux University, Bordeaux, France
| | - Saikat Santra
- Department of Clinical Inherited Metabolic Disorders, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | - Manuel Schiff
- Necker Hospital, APHP, Reference Center for Inborn Error of Metabolism and Filière G2M, Pediatrics Department, University of Paris, Paris, France
- Inserm UMR_S1163, Institut Imagine, Paris, France
| | - Aude Servais
- Nephrology and Transplantation, MAMEA Reference Center, Necker hospital, APHP, Paris, France
| | - Isidro Vitoria
- Unit of Metabolic Disorders, Universitary Hospital La Fe, Valencia, Spain
| | - Martina Huemer
- Division of Metabolism and Children's Research Center, University Children's Hospital, University of Zurich, Zurich, Switzerland
- Department of Pediatrics, Landeskrankenhaus Bregenz, Bregenz, Austria
| | - Viktor Kožich
- Department of Pediatrics and Inherited Metabolic Disorders, Charles University-First Faculty of Medicine and General University Hospital, Prague, Czech Republic
| | - Stefan Kölker
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital, Heidelberg, Germany
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