Evidence map›Paper›PMID 40166539›Full record

ArticlemedRxiv : the preprint server for health sciences2025

Identification of GGC Repeat Expansions in

Paula Saffie-Awad, Abraham Moller, Kensuke Daida, Pilar Alvarez Jerez, Zhongbo Chen, Zachary B Anderson, Mariam Isayan, Kimberly Paquette, Sophia B Gibson, Madison Fulcher and 13 more

Abstract readPreprint
In one paragraph

Article in medRxiv : the preprint server for health sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

23 authors.

Paula Saffie-AwadClínica Santa María, Santiago, Chile.ORCID 0000-0002-8056-365X
Abraham MollerCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
Kensuke DaidaLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0002-9177-9587
Pilar Alvarez JerezCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0002-5812-1898
Zhongbo ChenDepartment of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.ORCID 0000-0001-6668-7202
Zachary B AndersonDivision of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington, USA.
Mariam IsayanDepartment of Neurology and Neurosurgery, National Institute of Health, Yerevan, Armenia.ORCID 0009-0002-2387-5347
Kimberly PaquetteCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0003-3989-4614
Sophia B GibsonDivision of Genetic Medicine, Department of Pediatrics, University of Washington, Seattle, Washington, USA.ORCID 0000-0001-9839-9045
Madison FulcherLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.
Abigail Miano-BurkhardtLaboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0002-0447-4698
Laksh MalikCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0002-2498-146X
Breeana BakerCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0009-0006-0193-6558
Paige JarreauCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.
Henry HouldenDepartment of Neuromuscular Disease, Queen Square Institute of Neurology, UCL, London, UK.ORCID 0000-0002-2866-7777
Mina RytenDepartment of Genetics and Genomic Medicine, Great Ormond Street Institute of Child Health, UCL, London, UK.ORCID 0000-0001-9520-6957
Bida GuDepartment of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, USA.ORCID 0000-0001-8575-997X
Mark Jp ChaissonDepartment of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, USA.ORCID 0000-0001-5395-1457
Danny E MillerDepartment of Genome Sciences, University of Washington, Seattle, Washington 98195, USA.ORCID 0000-0001-6096-8601
Pedro Chaná-CuevasCentro de Trastornos del Movimiento, Facultad de Ciencias M' edicas, Universidad de Santiago de Chile, Santiago, Chile.ORCID 0000-0001-9946-3299
Cornelis BlauwendraatCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0001-9358-8111
Andrew B SingletonCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0001-5606-700X
Kimberley J BillingsleyCenter for Alzheimer's and Related Dementias, National Institute on Aging and National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA.ORCID 0000-0002-8003-4029

Funding

Long-read DNA sequencing of Alzheimers Disease and Related Dementias casesZIAAG000538 · NIA · NATIONAL INSTITUTE ON AGING · PI COOKSON, MARK · 2020 to 2025
$39.6M
TISSUE REPOSITORY COREP01AG000538 · NIA · UNIVERSITY OF CALIFORNIA-IRVINE · PI COTMAN, CARL WAYNE · 1985 to 2018
$24.8M
INTERDISCIPLINARY TRAINING IN GENOMIC SCIENCEST32HG000035 · NHGRI · UNIVERSITY OF WASHINGTON · PI Bruce Colston Trapnell · 1995 to 2026
$24.2M
Genetic characterization of atypical parkinsonismZIANS003154 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI SCHOLZ, SONJA · 2016 to 2025
$15.4M
Detection and genotyping complex human genetic variation using single-molecule sequencingR01HG011649 · NHGRI · UNIVERSITY OF SOUTHERN CALIFORNIA · PI Mark Chaisson · 2021 to 2026
$2.5M
Long-read DNA and RNA sequencing to identify disease-causing genetic variation and streamline testingDP5OD033357 · OD · UNIVERSITY OF WASHINGTON · PI MILLER, DANNY ERWIN · 2022 to 2025
$1.9M
Intramural NIH HHS ZIA AG000538Intramural NIH HHS ZIA NS003154NHGRI NIH HHS R01 HG011649NHGRI NIH HHS T32 HG000035NIA NIH HHS P01 AG000538NIH HHS DP5 OD033357Wellcome Trust
6 · The paper itself

Abstract

Background: Hereditary ataxias are genetically diverse, yet up to 75% remain undiagnosed due to technological and financial barriers. A pathogenic Methods: We performed Oxford Nanopore Technologies (ONT) genome long-read sequencing (>115 GB per sample) on a total of 15 individuals from Chile; 14 patients with suspected hereditary movement disorders and one unrelated family member. Variants were identified using PEPPER-Margin-DeepVariant 0.8 (SNVs), Sniffles 2.4 (SVs), and Vamos 2.1.3 (STRs). Ancestry was inferred using GenoTools with reference data from the 1000 Genomes Project, Human Genome Diversity Project, and an Ashkenazi Jewish panel. Haplotype analysis was conducted by phasing SNVs within Results: We identified Conclusion: This is the first report of SCA4 outside Northern Europe, confirming a shared founder haplotype and expansion instability. The presence of parkinsonism broadens the clinical spectrum. Comprehensive genetic testing across diverse populations is crucial, and long-read sequencing enhances diagnostic yield by detecting repeat expansions and SNVs in a single assay.

Identifiers

PMID40166539
PMCPMC11957069

What Socratic holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.