J 2022

WARS2 mutations cause dopa-responsive early-onset parkinsonism and progressive myoclonus ataxia

SKORVANEK, Matej; Irena REKTOROVÁ; Wim MANDEMAKERS; Matias WAGNER; Robert STEINFELD et. al.

Základní údaje

Originální název

WARS2 mutations cause dopa-responsive early-onset parkinsonism and progressive myoclonus ataxia

Autoři

SKORVANEK, Matej (garant); Irena REKTOROVÁ (203 Česká republika, domácí); Wim MANDEMAKERS; Matias WAGNER; Robert STEINFELD; Laura OREC; Vladimir HAN; Petra PAVELEKOVA; Alexandra LACKOVA; Kristina KULCSAROVA; Miriam OSTROZOVICOVA; Zuzana GDOVINOVA; Barbara PLECKO; Theresa BRUNET; Riccardo BERUTTI; Demy J S KUIPERS; Valerie BOUMEESTER; Petra HAVRANKOVA; M A J TIJSSEN; Rauan KAIYRZHANOV; Mie RIZIG; Henry HOULDEN; Juliane WINKELMANN; Vincenzo BONIFATI; Michael ZECH a Robert JECH

Vydání

PARKINSONISM & RELATED DISORDERS, OXFORD, ELSEVIER SCI LTD, 2022, 1353-8020

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

30210 Clinical neurology

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 4.100

Kód RIV

RIV/00216224:14110/22:00128075

Organizační jednotka

Lékařská fakulta

UT WoS

000748987300009

EID Scopus

2-s2.0-85120773777

Klíčová slova anglicky

WARS2; Early onset parkinsonism; Progressive myoclonus ataxia; Whole exome sequencing

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 28. 2. 2023 14:12, Mgr. Tereza Miškechová

Anotace

V originále

Introduction: Sixteen subjects with biallelic WARS2 variants encoding the tryptophanyl mitochondrial aminoacyl-tRNA synthetase, presenting with a neonatal- or infantile-onset mitochondrial disease, have been reported to date. Here we present six novel cases with WARS2-related diseases and expand the spectrum to later onset phenotypes including dopa-responsive early-onset parkinsonism and progressive myoclonus-ataxia. Methods: Six individuals from four families underwent whole-exome sequencing within research and diagnostic settings. Following the identification of a genetic defect, in-depth phenotyping and protein expression studies were performed. Results: A relatively common (gnomAD MAF = 0.0033) pathogenic p.(Trp13Gly) missense variant in WARS2 was detected in trans in all six affected individuals in combination with different pathogenic alleles (exon 2 deletion in family 1; p.(Leu100del) in family 2; p.(Gly50Asp) in family 3; and p.(Glu208*) in family 4). Two subjects presented with action tremor around age 10-12 years and developed tremor-dominant parkinsonism with prominent neuropsychiatric features later in their 20s. Two subjects presented with a progressive myoclonusataxia dominant phenotype. One subject presented with spasticity, choreo-dystonia, myoclonus, and speech problems. One subject presented with speech problems, ataxia, and tremor. Western blotting analyses in patientderived fibroblasts showed a markedly decreased expression of the full-length WARS2 protein in both subjects carrying p.(Trp13Gly) and an exon-2 deletion in compound heterozygosity. Conclusions: This study expands the spectrum of the disease to later onset phenotypes of early-onset tremordominant parkinsonism and progressive myoclonus-ataxia phenotypes.