Evidence map›Paper›PMID 33427739›Full record

ArticleJournal of Alzheimer's disease : JAD2021

Hemochromatosis Mutations, Brain Iron Imaging, and Dementia in the UK Biobank Cohort.

Janice L Atkins, Luke C Pilling, Christine J Heales, Sharon Savage, Chia-Ling Kuo, George A Kuchel, David C Steffens, David Melzer

Abstract read
In one paragraph

Article in Journal of Alzheimer's disease : JAD, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

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

  1. Guideline
  2. Haemochromatosis - a modern clinician's guide.Internal medicine journal · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. Association ofGenetics in medicine open · 2025
    Article
  8. Article
  9. Observational
  10. Article
  11. Article
  12. HFE Mutations in Neurodegenerative Disease as a Model of Hormesis.International journal of molecular sciences · 2024
    Review
  13. BMJ open · 2024
    Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. Observational
  19. Article
  20. Article
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

8 authors.

Janice L AtkinsEpidemiology and Public Health Group, University of Exeter Medical School, Exeter, UK.
Luke C PillingEpidemiology and Public Health Group, University of Exeter Medical School, Exeter, UK.
Christine J HealesMedical Imaging, College of Medicine and Health, University of Exeter, Exeter, UK.
Sharon SavagePsychology Department, University of Exeter, Exeter, UK and University of Newcastle, Newcastle, NSW, Australia.
Chia-Ling KuoCenter on Aging, University of Connecticut Health Center, Farmington, CT, USA.
George A KuchelBiostatistics Center, Connecticut Convergence Institute for Translation in Regenerative Engineering, UConn Health, Farmington, CT, USA.
David C SteffensDepartment of Psychiatry, University of Connecticut Health Center, Farmington, CT, USA.
David MelzerEpidemiology and Public Health Group, University of Exeter Medical School, Exeter, UK.

Funding

Medical Research Council MC_PC_17228Medical Research Council MC_QA137853Medical Research Council MR/M008924/1Medical Research Council MR/S009892/1
6 · The paper itself

Abstract

backgroundBrain iron deposition occurs in dementia. In European ancestry populations, the HFE p.C282Y variant can cause iron overload and hemochromatosis, mostly in homozygous males.

objectiveTo estimate p.C282Y associations with brain MRI features plus incident dementia diagnoses during follow-up in a large community cohort.

methodsUK Biobank participants with follow-up hospitalization records (mean 10.5 years). MRI in 206 p.C282Y homozygotes versus 23,349 without variants, including T2* measures (lower values indicating more iron).

resultsEuropean ancestry participants included 2,890 p.C282Y homozygotes. Male p.C282Y homozygotes had lower T2* measures in areas including the putamen, thalamus, and hippocampus, compared to no HFE mutations. Incident dementia was more common in p.C282Y homozygous men (Hazard Ratio HR = 1.83; 95% CI 1.23 to 2.72, p = 0.003), as was delirium. There were no associations in homozygote women or in heterozygotes.

conclusionStudies are needed of whether early iron reduction prevents or slows related brain pathologies in male HFE p.C282Y homozygotes.

Indexed as

Brain ChemistryAdultAgedBrainDatabases as TopicDementiaFemaleHemochromatosisHemochromatosis ProteinHumansIronMagnetic Resonance ImagingMaleMiddle AgedMutationNeuroimagingHemochromatosis ProteinHFE protein, humanIronCohortdeliriumdementiagenehemochromatosisironmutation

Identifiers

PMID33427739
PMCPMC7990419

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.