Evidence map›Paper›PMID 39825149›Full record

Observational studyNature medicine2025

Somatic CAG repeat expansion in blood associates with biomarkers of neurodegeneration in Huntington's disease decades before clinical motor diagnosis.

Rachael I Scahill, Mena Farag, Michael J Murphy, Nicola Z Hobbs, Michela Leocadi, Christelle Langley, Harry Knights, Marc Ciosi, Kate Fayer, Mitsuko Nakajima and 23 more

Abstract readObservational Study
In one paragraph

Observational study in Nature medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
–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

38 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Systematic Review with Meta-Analysis of Biofluid Markers for Huntington's Disease.Movement disorders : official journal of the Movement Disorder Society · 2025
    Pooled it
  2. Stage-dependent tau-PET signatures in Huntington's disease revealed by [¹⁸F]PI-2620.European journal of nuclear medicine and molecular imaging · 2026
    Article
  3. Fluid and Imaging Biomarkers in Huntington's Disease.Current neurology and neuroscience reports · 2026
    Review
  4. Article
  5. Article
  6. Review
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Huntington's disease clinical trials update: October 2025.Journal of Huntington's disease · 2026
    Review
  16. Article
  17. Review
  18. Article
  19. Article
  20. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

33 authors.

Rachael I Scahill *Huntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Mena Farag *Huntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.ORCID http://orcid.org/0000-0002-0679-0117
Michael J MurphyHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Nicola Z HobbsHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Michela LeocadiHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Christelle LangleyDepartment of Psychiatry, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-5061-2820
Harry KnightsHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Marc CiosiSchool of Molecular Biosciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.ORCID http://orcid.org/0000-0002-7663-4080
Kate FayerHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Mitsuko NakajimaHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Olivia ThackerayHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Johan GobomDepartment of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.ORCID http://orcid.org/0000-0001-6193-6193
John RönnholmDepartment of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.
Sophia WeinerDepartment of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.ORCID http://orcid.org/0009-0000-2298-220X
Yara R HassanHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Nehaa K P PonrajSchool of Molecular Biosciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.ORCID http://orcid.org/0009-0002-9576-5753
Carlos Estevez-FragaHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.ORCID http://orcid.org/0000-0001-6855-1093
Christopher S ParkerDepartment of Computer Science and Centre for Medical Image Computing, University College London, London, UK.
Ian B MaloneDementia Research Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.
Harpreet HyareDepartment of Brain Repair and Rehabilitation, UCL Queen Square Institute of Neurology, University College London, London, UK.
Jeffrey D LongDepartment of Psychiatry and Biostatistics, Carver College of Medicine and College of Public Health, University of Iowa, Iowa City, Iowa, USA.ORCID http://orcid.org/0000-0001-7181-9652
Amanda HeslegraveDementia Research Institute, University College London, London, UK.
Cristina SampaioFaculdade Medicina da Universidade de Lisboa (FMUL), Lisbon, Portugal.ORCID http://orcid.org/0000-0002-7052-9079
Hui ZhangDepartment of Computer Science and Centre for Medical Image Computing, University College London, London, UK.ORCID http://orcid.org/0000-0002-5426-2140
Trevor W RobbinsDepartment of Psychology, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0003-0642-5977
Henrik ZetterbergDepartment of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Mölndal, Sweden.
Edward J WildHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK.ORCID http://orcid.org/0000-0002-6921-7887
Geraint ReesUCL Institute of Cognitive Neuroscience, University College London, London, UK.ORCID http://orcid.org/0000-0002-9623-7007
James B RoweDepartment of Clinical Neurosciences, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK.ORCID http://orcid.org/0000-0001-7216-8679
Barbara J SahakianDepartment of Psychiatry, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-7352-1745
Darren G MoncktonSchool of Molecular Biosciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.ORCID http://orcid.org/0000-0002-8298-8264
Douglas R LangbehnDepartment of Psychiatry and Biostatistics, Carver College of Medicine and College of Public Health, University of Iowa, Iowa City, Iowa, USA.
Sarah J TabriziHuntington's Disease Centre, Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, University College London, London, UK. s.tabrizi@ucl.ac.uk.ORCID http://orcid.org/0000-0003-2716-2045

Funding

Medical Research Council MC_UU_00030/14Wellcome TrustWellcome Trust (Wellcome) 223082/Z/21/Z
6 · The paper itself

Abstract

Huntington's disease (HD) is an autosomal dominant neurodegenerative disease with the age at which characteristic symptoms manifest strongly influenced by inherited HTT CAG length. Somatic CAG expansion occurs throughout life and understanding the impact of somatic expansion on neurodegeneration is key to developing therapeutic targets. In 57 HD gene expanded (HDGE) individuals, ~23 years before their predicted clinical motor diagnosis, no significant decline in clinical, cognitive or neuropsychiatric function was observed over 4.5 years compared with 46 controls (false discovery rate (FDR) > 0.3). However, cerebrospinal fluid (CSF) markers showed very early signs of neurodegeneration in HDGE with elevated neurofilament light (NfL) protein, an indicator of neuroaxonal damage (FDR = 3.2 × 10

Indexed as

Huntingtin ProteinHuntington DiseaseTrinucleotide Repeat ExpansionAdultAgedBiomarkersEnkephalinsFemaleHumansMaleMiddle AgedNeurofilament ProteinsProtein PrecursorsBiomarkersEnkephalinsHTT protein, humanHuntingtin Proteinneurofilament protein LNeurofilament ProteinsProtein Precursors

Identifiers

PMID39825149
PMCPMC11922752

What OpenQuestion holds

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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 OpenQuestion graph.