Journal article
Disease-modifying effects of an SCAF4 structural variant in a predominantly SOD1 ALS cohort
Neurology Genetics, Vol.6(4), e470
2020
Abstract
Objective To test the hypothesis that rs573116164 will have disease-modifying effects in patients with superoxide dismutase 1 (SOD1) familial amyotrophic lateral sclerosis (fALS), we characterized rs573116164 within a cohort of 190 patients with fALS and 560 healthy age-matched controls to assess the variant for association with various measures of disease.
Methods Using a previously described bioinformatics evaluation algorithm, a polymorphic short structural variant associated with SOD1 was identified according to its theoretical effect on gene expression. An 12–18 poly-T repeat (rs573116164) within the 3′ untranslated region of serine and arginine rich proteins-related carboxy terminal domain associated factor 4 (SCAF4), a gene that is adjacent to SOD1, was assessed for disease association and influence on survival and age at onset in an fALS cohort using PCR, Sanger sequencing, and capillary separation techniques for allele detection.
Results In a North American cohort of predominantly SOD1 fALS patients (n =190) and age-matched healthy controls (n = 560), we showed that carriage of an 18T SCAF4 allele was associated with disease within this cohort (odds ratio [OR] 6.6; 95% confidence interval [CI] 3.9–11.2; p = 4.0e-11), but also within non-SOD1 cases (n = 27; OR 5.3; 95% CI 1.9–14.5; p = 0.0014). This finding suggests genetically SOD1-independent effects of SCAF4 on fALS susceptibility. Furthermore, carriage of an 18T allele was associated with a 26-month reduction in survival time (95% CI 6.6–40.8; p = 0.014), but did not affect age at onset of disease.
Conclusions The findings in this fALS cohort suggest that rs573116164 could have SOD1-independent and broader relevance in ALS, warranting further investigation in other fALS and sporadic ALS cohorts, as well as studies of functional effects of the 18T variant on gene expression.
Details
- Title
- Disease-modifying effects of an SCAF4 structural variant in a predominantly SOD1 ALS cohort
- Authors/Creators
- J. Pytte (Author/Creator) - Centre for Neuromuscular & Neurological DisordersL.L. Flynn (Author/Creator) - Centre for Neuromuscular & Neurological DisordersR.S. Anderton (Author/Creator) - The University of Notre Dame AustraliaF.L. Mastaglia (Author/Creator) - Centre for Neuromuscular & Neurological DisordersF. Theunissen (Author/Creator) - Centre for Neuromuscular & Neurological DisordersI. James (Author/Creator) - Murdoch UniversityA. Pfaff (Author/Creator) - Murdoch UniversityS. Kõks (Author/Creator) - Murdoch UniversityA.M. Saunders (Author/Creator) - Duke UniversityR. Bedlack (Author/Creator) - Duke UniversityD.K. Burns (Author/Creator) - Zinfandel Pharmaceuticals, Inc.M.W. Lutz (Author/Creator) - Duke UniversityN. Siddique (Author/Creator) - Northwestern UniversityT. Siddique (Author/Creator) - Northwestern UniversityA.D. Roses (Author/Creator) - Duke UniversityP.A. Akkari (Author/Creator) - Murdoch University
- Publication Details
- Neurology Genetics, Vol.6(4), e470
- Publisher
- Wolters Kluwer Health, Inc. on behalf of the American Academy of Neurology
- Identifiers
- 991005543378707891
- Copyright
- © 2020 American Academy of Neurology
- Murdoch Affiliation
- Centre for Molecular Medicine and Innovative Therapeutics; Institute for Immunology and Infectious Diseases
- Language
- English
- Resource Type
- Journal article
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- 1 Clinical & Life Sciences
- 1.52 Neurodegenerative Diseases
- 1.52.765 ALS Mechanisms
- Web Of Science research areas
- Clinical Neurology
- Genetics & Heredity
- ESI research areas
- Neuroscience & Behavior