AOPEP variants as a novel cause of recessive dystonia: Generalized dystonia and dystonia-parkinsonism

Garavaglia, Barbara; Vallian, Sadeq; Romito, Luigi M.; Straccia, Giulia; Capecci, Marianna; Invernizzi, Federica; Andrenelli, Elisa; Kazemi, Arezu; Boesch, Sylvia; Kopajtich, Robert; Olfati, Nahid; Shariati, Mohammad; Shoeibi, Ali; Sadr-Nabavi, Ariane; Prokisch, Holger; Winkelmann, Juliane und Zech, Michael (2022): AOPEP variants as a novel cause of recessive dystonia: Generalized dystonia and dystonia-parkinsonism. In: Parkinsonism & Related Disorders, Bd. 97: S. 52-56

Abstract

Introduction: The genetic basis of autosomal-recessive dystonia remains poorly understood. Our objective was to report identification of additional individuals with variants in AOPEP, a recently described gene for recessively inherited dystonic disorders (OMIM:619565). Methods: Ongoing analysis on a high-throughput genetic platform and international case-recruitment efforts were undertaken.Results: Novel biallelic, likely pathogenic loss-of-function alleles were identified in two pedigrees of different ethnic background. Two members of a consanguineous Iranian family shared a homozygous c.1917-1G>A essential splice-site variant and featured presentations of adolescence-onset generalized dystonia. An individual of Chinese descent, homozygous for the nonsense variant c.1909G>T (p.Glu637*), displayed childhood-onset generalized dystonia combined with later-manifesting parkinsonism. One additional Iranian patient with adolescence-onset generalized dystonia carried an ultrarare, likely protein-damaging homozygous missense variant (c.1201C>T [p.Arg401Trp]).Conclusions: These findings support the implication of AOPEP in recessive forms of generalized dystonia and dystonia-parkinsonism. Biallelic AOPEP variants represent a worldwide cause of dystonic movement-disorder phenotypes and should be considered in dystonia molecular testing approaches.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Medizin > Munich Cluster for Systems Neurology (SyNergy)
• Themengebiete: 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin und Gesundheit
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390857198