NeurOmics website

NeurOmics website

Integrated European Project on Omics Research of
Rare Neuromuscular and Neurodegenerative Diseases
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      • Ataxia
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      • 1 – Deep phenotype analysis in pre-symptomatic and symptomatic NDD/NMD patients
      • 2 – Identification of novel disease genes in NDD/NMD patients
      • 3 – Identification of modifying factors in cohorts enriched by deep phenotyping
      • 4 – Identification of hypothesis-driven biomarkers for disease progression
      • 5 – Development and implementation of disease group overlapping NGS-based diagnostic panels
      • 6 – Diagnostic read outs for predicting disease modification
      • 7 – Omics-based biomarkers for progression and therapy monitoring related to disease pathways
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      • 9 – Omics-assisted therapy development
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      • 11 – Modifier gene identification, prioritization and study
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      • Agilent Technologies
      • Ariadne Diagnostics, LLC
      • Bio-Prodict
      • Cambridge University
      • deCODE genetics
      • German Center for Neurodegenerative Diseases (DZNE)
      • Institut National de la Santé et de la Recherche Médicale
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      • Leiden University Medical Center – LUMC
      • Newcastle University
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  • Publication highlights
    • Publication highlights
      • 229th ENMC international workshop: Limb girdle muscular dystrophies – nomenclature and reformed classification, 17-19 March 2017, Naarden, The Netherlands

        Volker Straub, Alexander Murphy, Bjarne Udd


        Tracking disease progression non‐invasively in Duchenne and Becker muscular dystrophies

        Pietro Spitali, Kristina Hettne, Roula Tsonaka, Mohammed Charrout, Janneke van den Bergen, Zaïda Koeks, Hermien E. Kan, Melissa T. Hooijmans, Andreas Roos, Volker Straub, Francesco Muntoni,
        Cristina Al‐Khalili‐Szigyarto, Marleen J.A. Koel‐Simmelink, Charlotte E. Teunissen, Hanns Lochmüller, Erik H. Niks, Annemieke Aartsma‐Rus


        Survival in patients with spinocerebellar ataxia types 1, 2, 3, and 6 (EUROSCA): a longitudinal cohort study

        Alhassane Diallo, Heike Jacobi, Arron Cook, Robyn Labrum, Prof Alexandra Durr, Prof Alexis Brice, Perrine Charles, Cecilia Marelli, Caterina Mariotti, Lorenzo Nanetti, Marta Panzeri, Maria Rakowicz, Anna Sobanska, Anna Sulek, Tanja Schmitz-Hübsch, Ludger Schöls, Holger Hengel, Prof Bela Melegh, Prof Alessandro Filla, Antonella Antenora, Jon Infante, Prof José Berciano, Bart P van de Warrenburg, Dagmar Timmann, Sylvia Boesch, Prof Massimo Pandolfo, Prof Jörg B Schulz, Peter Bauer, Paola Giunti, Jun-Suk Kang, Prof Thomas Klockgether, Sophie Tezenas du Montcel


        Recessive variants of MuSK are associated with late onset CMS and predominant limb girdle weakness

        David Owen, Ana Töpf, Veeramani Preethish‐Kumar, Paolo José Lorenzoni, Bas Vroling, Rosana Herminia Scola, Elza Dias‐Tosta, Argemiro Geraldo, Kiran Polavarapu, Saraswati Nashi, Daniel Cox, Teresinha Evangelista, John Dawson, Rachel Thompson, Jan Senderek, Steven Laurie, Sergi Beltran, Marta Gut, Ivo Gut, Atchayaram Nalini, Hanns Lochmüller


        RD-Connect, NeurOmics and EURenOmics: collaborative European initiative for rare diseases

        Hanns Lochmüller, Dorota M. Badowska, Rachel Thompson, Nine V. Knoers, Annemieke Aartsma-Rus, Ivo Gut, Libby Wood, Tina Harmuth, Andre Durudas, Holm Graessner, Franz Schaefer, Olaf Riess, RD-Connect consortium, NeurOmics consortium & EURenOmics consortium


        The Beta-Adrenergic Agonist Salbutamol Modulates Neuromuscular Junction Formation in Zebrafish Models of Human Myasthenic Syndromes

        Grace McMacken, Dan Cox, Andreas Roos, Juliane Müller, Roger Whittaker, Hanns Lochmüller


        Rare non-synonymous variants in SORT1 are associated with increased risk for frontotemporal dementia

        Stéphanie Philtjens, Sara Van Mossevelde, Julie van der Zee, Eline Wauters, Lubina Dillen, Mathieu Vandenbulcke, Rik Vandenberghe, Adrian Ivanoiu, Anne Sieben, Christiana Willems, Luisa Benussi, Roberta Ghidoni, Giuliano Binetti, Barbara Borroni, Alessandro Padovani, Pau Pastor, Monica Diez-Fairen, Miquel Aguilar, Alexandre de Mendonça, Gabriel Miltenberger-Miltényi, Isabel Hernández, Merce Boada, Agustín Ruiz, Benedetta Nacmiass, Sandro Sorbi, Maria Rosário Almeida, Isabel Santana, Jordi Clarimón, Alberto Lleó, Giovanni B. Frisoni, Raquel Sanchez-Valle, Albert Lladó, Estrella Gómez-Tortosa, Ellen Gelpi, Marleen Van den Broeck, Karin Peeters, Patrick Cras, Peter P. De Deyn, Sebastiaan Engelborghs, Marc Cruts, Christine Van


        PFN2 and GAMT as common molecular determinants of axonal Charcot-Marie-Tooth disease

        Manisha Juneja, Abdelkrim Azmi, Jonathan Baets, Andreas Roos, Matthew J Jennings, Paola Saveri, Chiara Pisciotta, Nathalie Bernard-Marissal, Bernard L Schneider, Catherine Verfaillie, Roman Chrast, Pavel Seeman, Angelika F Hahn, Peter de Jonghe, Stuart Maudsley, Rita Horvath, Davide Pareyson, Vincent Timmerman


        Cross-sectional serum metabolomic study of multiple forms of muscular dystrophy

        Pietro Spitali, Kristina Hettne, Roula Tsonaka, Ekrem Sabir, Alexandre Seyer, Jesse B.A. Hemerik, Jelle J. Goeman, Esther Picillo, Manuela Ergoli, Luisa Politano, Annemieke Aartsma-Rus


        Harmonising phenomics information for a better interoperability in the rare disease field

        Sylvie Maiellaa, Annie Olrya, Marc Hanauera, Valérie Lanneaua, Halima Lourghia, Bruno Donadillea, Charlotte Rodwella, Sebastian Köhlerc, Dominik Seelowc, Simon Juppe, Helen Parkinsone, Tudor Grozaf, Michael Brudnod, Peter N. Robinsonb, Ana Ratha


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Clinical, pathological and functional characterization of riboflavin-responsive neuropathy

Authors

Andreea Manole, Zane Jaunmuktane, Iain Hargreaves, Marthe H. R. Ludtmann, Vincenzo Salpietro, Oscar D. Bello, Simon Pope, Amelie Pandraud, Alejandro Horga, Renata S. Scalco Abi Li, Balasubramaniem Ashokkumar, Charles M. Lourenço, Simon Heales, Rita Horvath, Patrick F. Chinnery, Camilo Toro, Andrew B. Singleton, Thomas S. Jacques, Andrey Y. Abramov, Francesco Muntoni, Michael G. Hanna, Mary M. Reilly, Tamas Revesz, Dimitri M. Kullmann, James E. C. Jepson, Henry Houlden

Journal

Brain,

Publication date

September 2017

Abstract

Brown-Vialetto-Van Laere syndrome represents a phenotypic spectrum of motor, sensory, and cranial nerve neuropathy, often with ataxia, optic atrophy and respiratory problems leading to ventilator-dependence. Loss-of-function mutations in two riboflavin transporter genes, SLC52A2 and SLC52A3, have recently been linked to Brown-Vialetto-Van Laere syndrome. However, the genetic frequency, neuropathology and downstream consequences of riboflavin transporter mutations are unclear. By screening a large cohort of 132 patients with early-onset severe sensory, motor and cranial nerve neuropathy we confirmed the strong genetic link between riboflavin transporter mutations and Brown-Vialetto-Van Laere syndrome, identifying 22 pathogenic mutations in SLC52A2 and SLC52A3, 14 of which were novel. Brain and spinal cord neuropathological examination of two cases with SLC52A3 mutations showed classical symmetrical brainstem lesions resembling pathology seen in mitochondrial disease, including severe neuronal loss in the lower cranial nerve nuclei, anterior horns and corresponding nerves, atrophy of the spinothalamic and spinocerebellar tracts and posterior column–medial lemniscus pathways. Mitochondrial dysfunction has previously been implicated in an array of neurodegenerative disorders. Since riboflavin metabolites are critical components of the mitochondrial electron transport chain, we hypothesized that reduced riboflavin transport would result in impaired mitochondrial activity, and confirmed this using in vitro and in vivo models. Electron transport chain complex I and complex II activity were decreased in SLC52A2 patient fibroblasts, while global knockdown of the single Drosophila melanogaster riboflavin transporter homologue revealed reduced levels of riboflavin, downstream metabolites, and electron transport chain complex I activity. This in turn led to abnormal mitochondrial membrane potential, respiratory chain activity and morphology. Riboflavin transporter knockdown in Drosophila also resulted in severely impaired locomotor activity and reduced lifespan, mirroring patient pathology, and these phenotypes could be partially rescued using a novel esterified derivative of riboflavin. Our findings expand the genetic, clinical and neuropathological features of Brown-Vialetto-Van Laere syndrome, implicate mitochondrial dysfunction as a downstream consequence of riboflavin transporter gene defects, and validate riboflavin esters as a potential therapeutic strategy.

DOI link

10.1093/brain/awx231

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The NeurOmics project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under grant agreement no 2012-305121.

 
   

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