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Karazi W, Scalco RS, Stemmerik MG, Løkken N, Lucia A, Santalla A, Martinuzzi A, Vavla M, Reni G, Toscano A, Musumeci O, Kouwenberg CV, Laforêt P, Millán BS, Vieitez I, Siciliano G, Kühnle E, Trost R, Sacconi S, Durmus H, Kierdaszuk B, Wakelin A, Andreu AL, Pinós T, Marti R, Quinlivan R, Vissing J, Voermans NC. Data from the European registry for patients with McArdle disease (EUROMAC): functional status and social participation. Orphanet J Rare Dis 2023; 18:210. [PMID: 37488619 PMCID: PMC10367320 DOI: 10.1186/s13023-023-02825-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 07/10/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND The European registry for individuals with GSD5 and other muscle glycogenosis (EUROMAC) was launched to register rare muscle glycogenosis in Europe, to facilitate recruitment for research trials and to learn about the phenotypes and disseminate knowledge about the diseases. A network of twenty collaborating partners from eight European countries and the US contributed data on rare muscle glycogenosis in the EUROMAC registry. METHODS Following the initial report on demographics, neuromuscular features and comorbidity (2020), we here present the data on social participation, previous and current treatments (medication, supplements, diet and rehabilitation) and limitations. Furthermore, the following questionnaires were used: Fatigue severity scale (FSS), WHO Disability Assessment Scale (DAS 2.0), health related quality of life (SF36) and International Physical Activity Questionnaire (IPAQ). RESULTS Of 282 participants with confirmed diagnoses of muscle glycogenosis, 269 had GSD5. Of them 196 (73%) completed all questionnaires; for the others, the data were incomplete. The majority, 180 (67%) were currently working. Previous medical treatments included pain medication (23%) and rehabilitation treatment (60%). The carbohydrate-rich diet was reported to be beneficial for 68%, the low sucrose diet for 76% and the ketogenic diet for 88%. Almost all participants (93%) reported difficulties climbing stairs. The median FSS score was 5.22, indicating severe fatigue. The data from the WHODAS and IPAQ was not of sufficient quality to be interpreted. CONCLUSIONS The EUROMAC registry have provided insight into the functional and social status of participants with GSD5: most participants are socially active despite limitations in physical and daily life activities. Regular physical activity and different dietary approaches may alleviate fatigue and pain.
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Affiliation(s)
- Walaa Karazi
- Neuromuscular Center Nijmegen, Department of Neurology, 910, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Center, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Renata S Scalco
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, National Hospital, London, UK
| | - Mads G Stemmerik
- Copenhagen Neuromuscular Center, Section 8077, , Rigshospitalet, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Nicoline Løkken
- Copenhagen Neuromuscular Center, Section 8077, , Rigshospitalet, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Alejandro Lucia
- Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain
- Instituto de Investigación Hospital, 12 de Octubre (imas12), Madrid, Spain
| | - Alfredo Santalla
- Instituto de Investigación Hospital, 12 de Octubre (imas12), Madrid, Spain
- Universidad Pablo de Olavide, Seville, Spain
| | - Andrea Martinuzzi
- Departments of Neurorehabilitation, IRCCS Medea Scientifc Insitute, Conegliano-Pieve Di Soligo, Italy
| | - Marinela Vavla
- Departments of Neurorehabilitation, IRCCS Medea Scientifc Insitute, Conegliano-Pieve Di Soligo, Italy
| | - Gianluigi Reni
- Department of Information Technology, Autonomous Province of Bolzano, Bolzano, Italy
| | - Antonio Toscano
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Olimpia Musumeci
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Carlyn V Kouwenberg
- Neuromuscular Center Nijmegen, Department of Neurology, 910, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Center, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Pascal Laforêt
- Neurology Department, Raymond Poincaré University Hospital, APHP, Garches, France
| | - Beatriz San Millán
- Pathology Department, Alvaro Cunqueiro Hospital, Vigo, Spain
- Rare Diseases and Pediatric Medicine Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGASUVIGO, Vigo, Spain
| | - Irene Vieitez
- Rare Diseases and Pediatric Medicine Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGASUVIGO, Vigo, Spain
| | - Gabriele Siciliano
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Enrico Kühnle
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bochum, Bochum, Germany
| | - Rebecca Trost
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bochum, Bochum, Germany
| | - Sabrina Sacconi
- Peripheral Nervous System and Muscle Department, CHU Nice, Université Côte D'Azur, Institute for Research On Cancer and Aging of Nice (IRCAN), INSERM U1081, CNRS UMR 7284, Faculty of Medicine, Université Côte D'Azur (UCA), Nice, France
| | - Hacer Durmus
- Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Biruta Kierdaszuk
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Andrew Wakelin
- Association for Glycogen Storage Disease (UK), Bristol, UK
| | - Antoni L Andreu
- EATRIS, European Infrastructure for Translational Medicine, 1081 HZ, Amsterdam, The Netherlands
| | - Tomàs Pinós
- Biomedical Network Research Centre on Rare Diseases (CIBERER), Instituto de Salud Carlos III, and Research Group on Neuromuscular and Mitochondrial Diseases, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - Ramon Marti
- Biomedical Network Research Centre on Rare Diseases (CIBERER), Instituto de Salud Carlos III, and Research Group on Neuromuscular and Mitochondrial Diseases, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - Ros Quinlivan
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, National Hospital, London, UK
| | - John Vissing
- Copenhagen Neuromuscular Center, Section 8077, , Rigshospitalet, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Nicol C Voermans
- Neuromuscular Center Nijmegen, Department of Neurology, 910, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Center, P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
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Stemmerik MG, Borch JDS, Dunø M, Krag T, Vissing J. Myopathy can be a key phenotype of membrin (GOSR2) deficiency. Hum Mutat 2021; 42:1101-1106. [PMID: 34167170 DOI: 10.1002/humu.24247] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 06/01/2021] [Accepted: 06/22/2021] [Indexed: 11/10/2022]
Abstract
T1-weighted, cross-sectional MR images showing shoulder girdle, abdominal, paraspinal, gluteal and thigh muscles almost completely replaced by fat, whereas lower leg muscles are almost unaffected i a patient who is compound heterozygous for pathogenic variants in GOSR2.
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Affiliation(s)
- Mads G Stemmerik
- Department of Neurology, Copenhagen Neuromuscular Center, University of Copenhagen, Copenhagen, Denmark
| | - Josefine de S Borch
- Department of Neurology, Copenhagen Neuromuscular Center, University of Copenhagen, Copenhagen, Denmark
| | - Morten Dunø
- Department of Clinical Genetics, Molecular Genetic Laboratory, University Hospital Copenhagen, Copenhagen, Denmark
| | - Thomas Krag
- Department of Neurology, Copenhagen Neuromuscular Center, University of Copenhagen, Copenhagen, Denmark
| | - John Vissing
- Department of Neurology, Copenhagen Neuromuscular Center, University of Copenhagen, Copenhagen, Denmark
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Scalco RS, Lucia A, Santalla A, Martinuzzi A, Vavla M, Reni G, Toscano A, Musumeci O, Voermans NC, Kouwenberg CV, Laforêt P, San-Millán B, Vieitez I, Siciliano G, Kühnle E, Trost R, Sacconi S, Stemmerik MG, Durmus H, Kierdaszuk B, Wakelin A, Andreu AL, Pinós T, Marti R, Quinlivan R, Vissing J. Data from the European registry for patients with McArdle disease and other muscle glycogenoses (EUROMAC). Orphanet J Rare Dis 2020; 15:330. [PMID: 33234167 PMCID: PMC7687836 DOI: 10.1186/s13023-020-01562-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 09/25/2020] [Indexed: 01/12/2023] Open
Abstract
Background The European registry for patients with McArdle disease and other muscle glycogenoses (EUROMAC) was launched to register rare muscle glycogenoses in Europe, to facilitate recruitment for research trials and to learn about the phenotypes and disseminate knowledge about the diseases through workshops and websites. A network of twenty full and collaborating partners from eight European countries and the US contributed data on rare muscle glycogenosis in the EUROMAC registry. After approximately 3 years of data collection, the data in the registry was analysed.
Results Of 282 patients with confirmed diagnoses of muscle glycogenosis, 269 had McArdle disease. New phenotypic features of McArdle disease were suggested, including a higher frequency (51.4%) of fixed weakness than reported before, normal CK values in a minority of patients (6.8%), ptosis in 8 patients, body mass index above background population and number of comorbidities with a higher frequency than in the background population (hypothyroidism, coronary heart disease). Conclusions The EUROMAC project and registry have provided insight into new phenotypic features of McArdle disease and the variety of co-comorbidities affecting people with McArdle disease. This should lead to better management of these disorders in the future, including controlling weight, and preventive screening for thyroid and coronary artery diseases, as well as physical examination with attention on occurrence of ptosis and fixed muscle weakness. Normal serum creatine kinase in a minority of patients stresses the need to not discard a diagnosis of McArdle disease even though creatine kinase is normal and episodes of myoglobinuria are absent.
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Affiliation(s)
- Renata S Scalco
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, National Hospital, London, UK
| | - Alejandro Lucia
- Faculty of Sport Sciences, Universidad Europea de Madrid, Madrid, Spain.,Instituto de Investigación Hospital, 12 de Octubre (imas12), Madrid, Spain
| | - Alfredo Santalla
- Instituto de Investigación Hospital, 12 de Octubre (imas12), Madrid, Spain.,Universidad Pablo de Olavide, Seville, Spain
| | - Andrea Martinuzzi
- Dept. of Conegliano-Pieve Di Soligo, IRCCS Medea Scientific Insitute, Bosisio Parini, Italy
| | - Marinela Vavla
- Dept. of Conegliano-Pieve Di Soligo, IRCCS Medea Scientific Insitute, Bosisio Parini, Italy
| | - Gianluigi Reni
- Dept. of Conegliano-Pieve Di Soligo, IRCCS Medea Scientific Insitute, Bosisio Parini, Italy
| | - Antonio Toscano
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Olimpia Musumeci
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Carlyn V Kouwenberg
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Pascal Laforêt
- Nord/Est/Ile de France Neuromuscular Reference Center, Neurology Department, Raymond-Poincaré Teaching Hospital, Garches. AP-HP. INSERM U1179, END-ICAP, Paris Saclay University, Paris, France
| | - Beatriz San-Millán
- Pathology Deparment, Alvaro Cunqueiro Hospital, Vigo, Spain.,Rare Diseases and Pediatric Medicine Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Irene Vieitez
- Rare Diseases and Pediatric Medicine Research Group, Galicia Sur Health Research Institute (IIS Galicia Sur), SERGAS-UVIGO, Vigo, Spain
| | - Gabriele Siciliano
- Neurology and Neuromuscular Diseases Unit, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
| | - Enrico Kühnle
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bochum, Bochum, Germany
| | - Rebeca Trost
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bochum, Bochum, Germany
| | - Sabrina Sacconi
- Peripheral Nervous System and Muscle Department, CHU Nice, Université Côte D'Azur, Institute for Research On Cancer and Aging of Nice (IRCAN), INSERM U1081, CNRS UMR 7284, Faculty of Medicine, Université Côte D'Azur (UCA), Nice, France
| | - Mads G Stemmerik
- Copenhagen Neuromuscular Center, Section 6921, Rigshospitalet, University of Copenhagen, 2100, Copenhagen, Denmark
| | - Hacer Durmus
- Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Biruta Kierdaszuk
- Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Andrew Wakelin
- Association for Glycogen Storage Disease (UK), Bristol, UK
| | - Antoni L Andreu
- Biomedical Network Research Centre on Rare Diseases (CIBERER), Instituto de Salud Carlos III, and Research Group on Neuromuscular and Mitochondrial Diseases, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - Tomàs Pinós
- Biomedical Network Research Centre on Rare Diseases (CIBERER), Instituto de Salud Carlos III, and Research Group on Neuromuscular and Mitochondrial Diseases, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - Ramon Marti
- Biomedical Network Research Centre on Rare Diseases (CIBERER), Instituto de Salud Carlos III, and Research Group on Neuromuscular and Mitochondrial Diseases, Vall d'Hebron Research Institute, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - Ros Quinlivan
- MRC Centre for Neuromuscular Diseases, UCL Institute of Neurology, National Hospital, London, UK
| | - John Vissing
- Copenhagen Neuromuscular Center, Section 6921, Rigshospitalet, University of Copenhagen, 2100, Copenhagen, Denmark.
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Madsen KL, Laforêt P, Buch AE, Stemmerik MG, Ottolenghi C, Hatem SN, Raaschou-Pedersen DT, Poulsen NS, Atencio M, Luton MP, Ceccaldi A, Haller RG, Quinlivan R, Mochel F, Vissing J. No effect of triheptanoin on exercise performance in McArdle disease. Ann Clin Transl Neurol 2019; 6:1949-1960. [PMID: 31520525 PMCID: PMC6801166 DOI: 10.1002/acn3.50863] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/21/2019] [Accepted: 06/22/2019] [Indexed: 12/25/2022] Open
Abstract
Objective To study if treatment with triheptanoin, a 7‐carbon triglyceride, improves exercise tolerance in patients with McArdle disease. McArdle patients have a complete block in glycogenolysis and glycogen‐dependent expansion of tricarboxylic acid cycle (TCA), which may restrict fat oxidation. We hypothesized that triheptanoin metabolism generates substrates for the TCA, which potentially boosts fat oxidation and improves exercise tolerance in McArdle disease. Methods Double‐blind, placebo‐controlled, crossover study in patients with McArdle disease completing two treatment periods of 14 days each with a triheptanoin or placebo diet (1 g/kg/day). Primary outcome was change in mean heart rate during 20 min submaximal exercise on a cycle ergometer. Secondary outcomes were change in peak workload and oxygen uptake along with changes in blood metabolites and respiratory quotients. Results Nineteen of 22 patients completed the trial. Malate levels rose on triheptanoin treatment versus placebo (8.0 ± SD2.3 vs. 5.5 ± SD1.8 µmol/L, P < 0.001), but dropped from rest to exercise (P < 0.001). There was no difference in exercise heart rates between triheptanoin (120 ± SD16 bpm) and placebo (121 ± SD16 bpm) treatments. Compared with placebo, triheptanoin did not change the submaximal respiratory quotient (0.82 ± SD0.05 vs. 0.84 ± SD0.03), peak workload (105 ± SD38 vs. 102 ± SD31 Watts), or peak oxygen uptake (1938 ± SD499 vs. 1977 ± SD380 mL/min). Interpretation Despite increased resting plasma malate with triheptanoin, the increase was insufficient to generate a normal TCA turnover during exercise and the treatment has no effect on exercise capacity or oxidative metabolism in patients with McArdle disease.
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Affiliation(s)
- Karen L Madsen
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
| | - Pascal Laforêt
- Centre de référence des maladies neuromusculaires Nord/Est/Ile de France, Service de Neurologie, Hôpital Raymond-Poincaré, AP-HP, Garches, France
| | - Astrid E Buch
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
| | - Mads G Stemmerik
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
| | - Chris Ottolenghi
- Metabolomics Unit, Service des Explorations fonctionnelles, Necker Hospital and Descartes University of Paris, AP-HP, Paris, France
| | - Stéphane N Hatem
- Institute of Cardiometabolism and Nutrition, La Pitié-Salpêtrière Hospital, AP-HP, Paris, France.,Cardiology Institute, La Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Daniel T Raaschou-Pedersen
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
| | - Nanna S Poulsen
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
| | - Maria Atencio
- Inserm U 1127, CNRS UMR 7225, ICM, F-75013, Paris, France
| | | | - Alexandre Ceccaldi
- Institute of Cardiometabolism and Nutrition, La Pitié-Salpêtrière Hospital, AP-HP, Paris, France.,Cardiology Institute, La Pitié-Salpêtrière Hospital, AP-HP, Paris, France
| | - Ronald G Haller
- Neuromuscular Center, Institute for Exercise and Environmental Medicine of Texas Health Presbyterian Hospital, Dallas, Texas.,Department of Neurology and Neurotherapeutics, The University of Texas Southwestern Medical Center Dallas, Dallas, Texas
| | - Ros Quinlivan
- MRC Centre for Neuromuscular Diseases, National Hospital for Neurology and Neurosurgery, Queen Square, London, England
| | - Fanny Mochel
- Inserm U 1127, CNRS UMR 7225, ICM, F-75013, Paris, France.,Sorbonne Université, UPMC-Paris 6, UMR S 1127, Paris, France.,Department of Genetics and Reference Center for Adult Neurometabolic diseases, La Pitié-Salpêtrière University Hospital, APHP, Paris, France
| | - John Vissing
- Copenhagen Neuromuscular Center, Department of Neurology, Rigshospitalet and University of Copenhagen, Copenhagen, Denmark
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Raaschou-Pedersen D, Madsen KL, Stemmerik MG, Eisum ASV, Straub V, Vissing J. Fat oxidation is impaired during exercise in lipin-1 deficiency. Neurology 2019; 93:e1433-e1438. [PMID: 31492716 DOI: 10.1212/wnl.0000000000008240] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 05/10/2019] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To investigate substrate metabolism during exercise in an adult with lipin-1 deficiency, an inherited defect in lipid homeostasis, and to study the effect of glucose supplementation on his exercise tolerance. METHODS We studied a 48-year-old man with lipin-1 deficiency and 2 healthy men. The patient has exercise intolerance and monthly episodes of rhabdomyolysis. All participants performed a submaximal exercise test while total fatty acid oxidation (FAO) and palmitate oxidation rate were assessed by stable isotope technique and indirect calorimetry. On another day, the patient was infused with 10% glucose (410 mL/h) and repeated the exercise. On the third and fourth visits, he was randomized in a double-blind manner to drink a supplement of glucose (soft drink 2% concentration) or placebo (soft drink: aspartame, acesulfame-K) before and during exercise. RESULTS Mean FAO and palmitate oxidation rate during exercise were lower in the patient vs controls: 431 vs 1,271 and 1912 μmol/min and 122 vs 191 and 212 μmol/min. Plasma fatty acid concentration was lower in the patient during exercise than in controls: 477 vs 643 and 630 μmol/L. The patient's exercise duration increased from 36 to 60 minutes with IV glucose and 46 minutes with oral glucose, and his rating of exertion dropped from 15 to 9 on average (Borg scale). CONCLUSION In this adult lipin-1-deficient patient, FAO was reduced, which was associated with no increase in plasma free fatty acids during submaximal exercise, and his exercise capacity improved with continuous ingestion of high-dose glucose. CLINICALTRIALSGOV IDENTIFIER NCT02635269.
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Affiliation(s)
- Daniel Raaschou-Pedersen
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK.
| | - Karen L Madsen
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Mads G Stemmerik
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Anne-Sofie V Eisum
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - Volker Straub
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
| | - John Vissing
- From the Copenhagen Neuromuscular Center (D.R.-P., K.L.M., M.G.S., A.-S.V.E., J.V.), Department of Neurology, Rigshospitalet, University of Copenhagen, Denmark; John Walton Muscular Dystrophy Research Centre (V.S.), Institute of Genetic Medicine, Newcastle University; and Newcastle Hospitals NHS Foundation Trust (V.S.), UK
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Abstract
We investigated the in vivo skeletal muscle metabolism in patients with multiple acyl-CoA dehydrogenase deficiency (MADD) during exercise, and the effect of a glucose infusion. Two adults with MADD on riboflavin and l-carnitine treatment and 10 healthy controls performed an incremental exercise test measuring maximal oxidative capacity (VO2max) and a submaximal exercise test (≤1 hour) on a cycle ergometer. During submaximal exercise, we studied fat and carbohydrate oxidation, using stable isotope tracer methodology and indirect calorimetry. On another day, the patients repeated the submaximal exercise receiving a 10% glucose infusion. The patients had a lower VO2max than controls and stopped the submaximal exercise test at 51 and 58 minutes due to muscle pain and exhaustion. The exercise-induced increase in total fatty acid oxidation was blunted in the patients (7.1 and 1.1 vs 12 ± 4 μmol × kg-1 × min-1 in the healthy controls), but total carbohydrate oxidation was higher (67 and 63 vs 25 ± 11 μmol × kg-1 × min-1 in controls). With glucose infusion, muscle pain decreased and average heart rate during exercise dropped in both patients from 124 to 119 bpm and 138 to 119 bpm. We demonstrate that exercise intolerance in MADD-patients relates to an inability to increase fat oxidation appropriately during exercise, which is compensated partially by an increase in carbohydrate metabolism.
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Affiliation(s)
- Karen L. Madsen
- Copenhagen Neuromuscular Center, Department of NeurologyCopenhagen Neuromuscular Center, RigshospitaletCopenhagenDenmark
| | - Nicolai Preisler
- Copenhagen Neuromuscular Center, Department of NeurologyCopenhagen Neuromuscular Center, RigshospitaletCopenhagenDenmark
| | - Astrid E. Buch
- Copenhagen Neuromuscular Center, Department of NeurologyCopenhagen Neuromuscular Center, RigshospitaletCopenhagenDenmark
| | - Mads G. Stemmerik
- Copenhagen Neuromuscular Center, Department of NeurologyCopenhagen Neuromuscular Center, RigshospitaletCopenhagenDenmark
| | - Pascal Laforêt
- Neuromuscular Center, Department of Neurology, Neuromuscular CenterRaymond‐Poincaré HospitalGarchesFrance
- INSERM U1179, END‐ICAPVersailles Saint‐Quentin‐en‐Yvelines UniversityMontigny‐le‐BretonneuxFrance
| | - John Vissing
- Copenhagen Neuromuscular Center, Department of NeurologyCopenhagen Neuromuscular Center, RigshospitaletCopenhagenDenmark
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