ArticleAmerican journal of human genetics2024
CAG repeat mosaicism is gene specific in spinocerebellar ataxias.
Article in American journal of human genetics, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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.
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.
Who cites it
17 citing papers in PubMed, 23 citations in OpenAlex.
- Toward the clinical application of long-read sequencing in repeat-expansion disorders.Nature genetics · 2026Review
- Tandem repeats in human brain evolution and disease susceptibility.Molecules and cells · 2026Review
- Repeat-associated ataxias in a German patient cohort analysed by targeted parallel long-read sequencing.Brain : a journal of neurology · 2026Article
- Bioinformatic Analyses of the Ataxin-2 Family Since Algae Emphasize Its Small Isoforms, Large Chimerisms, and the Importance of Human Exon 1B as Target of Therapies to Prevent Neurodegeneration.International journal of molecular sciences · 2026Article
- Article
- Mismatch repair MLH complexes make distinct contributions to post-replicative mismatch repair versus trinucleotide repeat expansions.bioRxiv : the preprint server for biology · 2026Article
- The role of neurofilament light chain and other fluid biomarkers in cerebellar ataxias.Brain communications · 2026Review
- Translational Relevance of SCA1 Models for the Development of Therapies for Spinocerebellar Ataxia Type 1.Biomedicines · 2025Review
- Unstable FGF14 GAA repeat expansions in Indian ataxia patients: a broader phenotype and involvement of modifier loci?Journal of human genetics · 2025Article
- Challenges in Polyglutamine Diseases: From Dysfunctional Neuronal Circuitries to Neuron-Specific CAG Repeat Instability.International journal of molecular sciences · 2025Review
- Accurate Quantification of Mutant and Wild-Type polyQ Proteins Using Simple Western Capillary Immunoassays.Molecular neurobiology · 2025Article
- Somatic instability of the FGF14-SCA27B GAA•TTC repeat reveals a marked expansion bias in the cerebellum.Brain : a journal of neurology · 2025Article
- CAG Repeat Instability and Region-Specific Gene Expression Changes in the SCA12 Brain.Cerebellum (London, England) · 2025Article
- Review
- Substantia nigra degeneration in spinocerebellar ataxia 2 and 7 using neuromelanin-sensitive imaging.European journal of neurology · 2025Article
- Age-dependent somatic expansion of the ATXN3 CAG repeat in the blood and buccal swab DNA of individuals with spinocerebellar ataxia type 3/Machado-Joseph disease.Human genetics · 2024Article
- Early-onset phenotype in a patient with an intermediate allele and a large SCA1 expansion: a case report.BMC neurology · 2024Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
19 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Expanded CAG repeats in coding regions of different genes are the most common cause of dominantly inherited spinocerebellar ataxias (SCAs). These repeats are unstable through the germline, and larger repeats lead to earlier onset. We measured somatic expansion in blood samples collected from 30 SCA1, 50 SCA2, 74 SCA3, and 30 SCA7 individuals over a mean interval of 8.5 years, along with postmortem tissues and fetal tissues from SCA1, SCA3, and SCA7 individuals to examine somatic expansion at different stages of life. We showed that somatic mosaicism in the blood increases over time. Expansion levels are significantly different among SCAs and correlate with CAG repeat lengths. The level of expansion is greater in individuals with SCA7 who manifest disease compared to that of those who do not yet display symptoms. Brain tissues from SCA individuals have larger expansions compared to the blood. The cerebellum has the lowest mosaicism among the studied brain regions, along with a high expression of ATXNs and DNA repair genes. This was the opposite in cortices, with the highest mosaicism and lower expression of ATXNs and DNA repair genes. Fetal cortices did not show repeat instability. This study shows that CAG repeats are increasingly unstable during life in the blood and the brain of SCA individuals, with gene- and tissue-specific patterns.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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 OpenQuestion graph.