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Introduction: Ataxia with oculomotor apraxia type 2 (AOA2) is a rare autosomal recessive cerebellar ataxia characterized by progressive cerebellar ataxia, sensorimotor peripheral neuropathy, and occasional oculomotor apraxia.
Case Report: A 50-year-old male with a history of orthopedic shoe use since childhood presented with slowly progressive ataxia and neuropathy. Laboratory tests showed elevated serum alpha-fetoprotein levels and increased total cholesterol. Clinical whole genome sequencing identified a c.4853C > G (p.Ser1618Ter) homozygous pathogenic variant in SETX.
Conclusion: The case highlights the challenges identifying rare disorders like AOA2 due to limited access to genetic testing and socioeconomic and healthcare barriers.
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http://dx.doi.org/10.1016/j.clineuro.2025.108823 | DOI Listing |
Mov Disord Clin Pract
August 2025
Neurology department, Pelopidas Silveira Hospital, Recife, Brazil.
J Appl Genet
August 2025
Faculty of Biology, Institute of Genetics and Biotechnology, University of Warsaw, Pawińskiego 5a, Warsaw, 02-106, Poland.
Senataxin, an RNA/DNA helicase, is a key protein providing genome stability and one of the best characterized R-loop-binding factors playing an important role in transcription and DNA repair processes. Pathogenic SETX gene variants cause autosomal recessive spinocerebellar ataxia with axonal neuropathy (AOA2, MIM #606002) and autosomal dominant juvenile amyotrophic lateral sclerosis (ALS4, MIM #602433), rare neurodegenerative disorders characterized by juvenile onset of progressive cerebellar ataxia, axonal sensorimotor peripheral neuropathy, combined upper and lower motor neuron symptoms, and increased serum alpha-fetoprotein (AFP; specific for AOA2). We report two cases of adult patients presenting with cerebellar syndrome, scanned speech, and exercise intolerance which started in the second/third decade of life and were followed by muscle weakness and impaired gait coordination.
View Article and Find Full Text PDFOculomotor deficits are common in hereditary cerebellar ataxias (HCAs) and their quantitative assessment offers a sensitive and reliable manner to capture disease-severity and progression. As a group of experts of the Ataxia Global Initiative to support trial readiness, we previously established harmonized methodology for quantitative oculomotor assessments in HCAs. Here, we aimed to identify to most promising oculomotor/vestibular outcomes as endpoints for future trials.
View Article and Find Full Text PDFMov Disord Clin Pract
July 2025
Department of Neurology with Experimental Neurology, Movement Disorders and Neuromodulation Unit, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.