Evidence map›Paper›PMID 40682810›Full record

ArticleBrain : a journal of neurology2025

Neurodegenerative disease in C9orf72 repeat expansion carriers: population risk and effect of UNC13A.

Jiali Gao, Andrew G L Douglas, Christos V Chalitsios, Jakub Scaber, Kevin Talbot, Martin R Turner, Alexander G Thompson

Abstract read
In one paragraph

Article in Brain : a journal of neurology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

11 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Jiali GaoNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.ORCID 0000-0002-5461-1742
Andrew G L DouglasNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.
Christos V ChalitsiosNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.
Jakub ScaberNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.ORCID 0000-0003-0146-1821
Kevin TalbotNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.ORCID 0000-0001-5490-1697
Martin R TurnerNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.ORCID 0000-0003-0267-3180
Alexander G ThompsonNuffield Department of Clinical Neurosciences, University of Oxford, Oxford OX3 9DU, UK.ORCID 0000-0003-1063-3277

Funding

Medical Research Council MR/T006927/1Motor Neurone Disease Association Thompson/Apr23/896-791Motor Neurone Disease Association Thompson/Jan20/952-795My Name'5 Doddie Foundation
6 · The paper itself

Abstract

The C9orf72 hexanucleotide repeat expansion (HRE) is the most common monogenetic cause of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Neurodegenerative disease incidence in C9orf72 HRE carriers has been studied using cohorts from disease-affected families or by extrapolating from population disease incidence, potentially introducing bias. Age-specific cumulative incidence of ALS and dementia was estimated using Kaplan-Meier and competing risk models in C9orf72 HRE carriers compared to matched controls in UK Biobank. Risk modification by UNC13A genotype was examined. Of 490 331 individuals with valid genetic data, 701 had >100 repeats in C9orf72 [median age 55 (interquartile range 48-62), follow-up 13.4 years (12.3-14.1)]. The cumulative incidence of ALS or dementia was 66% (95% confidence interval 57%-73%) by age 80 in C9orf72 HRE carriers versus 5.8% (4.5%-7.0%) in controls, or 58% (50%-64%) versus 5.1% (4.1%-6.4%), accounting for the competing risk of other-cause mortality. Forty-one per cent of dementia incidence accrued between age 75-80. C-allele homozygosity at rs12608932 in UNC13A increased ALS or dementia risk in C9orf72 HRE carriers [hazard ratio 1.81 (1.18-2.78)]. C9orf72 HRE disease was incompletely penetrant in this population-based cohort, with risk modified by UNC13A genotype. This has implications for counselling at-risk individuals and modelling expected phenoconversion for prevention trials.

Indexed as

Amyotrophic Lateral SclerosisDNA Repeat ExpansionFrontotemporal DementiaNerve Tissue ProteinsNeurodegenerative DiseasesProteinsAgedAged, 80 and overC9orf72 ProteinCohort StudiesFemaleGenetic Predisposition to DiseaseGenotypeHeterozygoteHumansIncidenceC9orf72 ProteinC9orf72 protein, humanNerve Tissue ProteinsProteinsamyotrophic lateral sclerosisC9orf72frontotemporal dementianeurodegenerationUNC13A

Identifiers

PMID40682810
PMCPMC12588677

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Registered trials

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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.