Evidence map›Paper›PMID 36639817›Full record

Trial reportClinical epigenetics2023

Vitamin C boosts DNA demethylation in TET2 germline mutation carriers.

Aurora Taira, Kimmo Palin, Anna Kuosmanen, Niko Välimäki, Outi Kuittinen, Outi Kuismin, Eevi Kaasinen, Kristiina Rajamäki, Lauri A Aaltonen

Open access · goldAbstract readClinical Trial
In one paragraph

Trial report in Clinical epigenetics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% of its field
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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Review
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  7. Review
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  9. Review
  10. Article
  11. Review
  12. HemaSphere · 2026
    Article
  13. Impact of Epigenetic Mutations in Chronic Myelomonocytic Leukemia.Current hematologic malignancy reports · 2025
    Review
  14. Review
  15. Review
  16. Review
  17. High-dose vitamin C as a metabolic treatment of cancer: a new dimension in the era of adjuvant and intensive therapy.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
    Review
  18. Review
  19. Clonal hematopoiesis and atherosclerosis.The Journal of clinical investigation · 2024
    Review
  20. Review
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

9 authors at 3 institutions in 1 country.

Aurora TairaDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Kimmo PalinDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Anna KuosmanenDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Niko VälimäkiDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Outi KuittinenDepartment of Clinical Medicine, Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland.
Outi KuisminPEDEGO Research Unit, University of Oulu, Oulu, Finland.
Eevi KaasinenDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Kristiina RajamäkiDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland.
Lauri A AaltonenDepartment of Medical and Clinical Genetics, University of Helsinki, Helsinki, Finland. lauri.aaltonen@helsinki.fi.
University of Helsinki · FIKuopio University Hospital · FIOulu University Hospital · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAccurate regulation of DNA methylation is necessary for normal cells to differentiate, develop and function. TET2 catalyzes stepwise DNA demethylation in hematopoietic cells. Mutations in the TET2 gene predispose to hematological malignancies by causing DNA methylation overload and aberrant epigenomic landscape. Studies on mice and cell lines show that the function of TET2 is boosted by vitamin C. Thus, by strengthening the demethylation activity of TET2, vitamin C could play a role in the prevention of hematological malignancies in individuals with TET2 dysfunction. We recently identified a family with lymphoma predisposition where a heterozygous truncating germline mutation in TET2 segregated with nodular lymphocyte-predominant Hodgkin lymphoma. The mutation carriers displayed a hypermethylation pattern that was absent in the family members without the mutation.

methodsIn a clinical trial of 1 year, we investigated the effects of oral 1 g/day vitamin C supplementation on DNA methylation by analyzing genome-wide DNA methylation and gene expression patterns from the family members.

resultsWe show that vitamin C reinforces the DNA demethylation cascade, reduces the proportion of hypermethylated loci and diminishes gene expression differences between TET2 mutation carriers and control individuals.

conclusionsThese results suggest that vitamin C supplementation increases DNA methylation turnover and provide a basis for further work to examine the potential benefits of vitamin C supplementation in individuals with germline and somatic TET2 mutations.

trial registrationThis trial was registered at EudraCT with reference number of 2018-000155-41 (01.04.2019).

Indexed as

Ascorbic AcidDioxygenasesDNA-Binding ProteinsHematologic NeoplasmsDNA DemethylationDNA MethylationGerm-Line MutationHumansMutationVitaminsAscorbic AcidDioxygenasesDNA-Binding ProteinsTET2 protein, humanVitaminsDNA methylationHematological neoplasiaTET2 mutationsVitamin C

Identifiers

PMID36639817
PMCPMC9840351
OpenAlexW4316011657

What OpenQuestion holds

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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.