Evidence map›Paper›PMID 35998097›Full record

SynthesisJournal of Crohn's & colitis2023

Systematic Review and Meta-analysis of Peripheral Blood DNA Methylation Studies in Inflammatory Bowel Disease.

Vincent Joustra, Ishtu L Hageman, Jack Satsangi, Alex Adams, Nicholas T Ventham, Wouter J de Jonge, Peter Henneman, Geert R D'Haens, Andrew Y F Li Yim

Open access · hybridAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Journal of Crohn's & colitis, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 2 pooled it
2.7field-weighted citation impact, top 9% 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, 2 syntheses or guidelines pooled it, 33 citations in OpenAlex.

  1. Pooled it
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  7. Selenium: A Key Element in Inflammatory Bowel Disease.Antioxidants (Basel, Switzerland) · 2025
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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

9 authors at 5 institutions in 2 countries.

Vincent JoustraAmsterdam UMC location University of Amsterdam, Department of Gastroenterology and Hepatology, Meibergdreef 9, Amsterdam, Netherlands.
Ishtu L HagemanAmsterdam UMC location University of Amsterdam, Department of Gastroenterology and Hepatology, Meibergdreef 9, Amsterdam, Netherlands.
Jack SatsangiTranslational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK.
Alex AdamsTranslational Gastroenterology Unit, NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, Oxford, UK.
Nicholas T VenthamInstitute of Genetics and Molecular Medicine, University of Edinburgh, UK.
Wouter J de JongeAmsterdam UMC location University of Amsterdam, Department of Gastroenterology and Hepatology, Meibergdreef 9, Amsterdam, Netherlands.
Peter HennemanAmsterdam UMC location University of Amsterdam, Department of Human Genetics, Genome Diagnostics Laboratory, Amsterdam, Netherlands.
Geert R D'HaensAmsterdam UMC location University of Amsterdam, Department of Gastroenterology and Hepatology, Meibergdreef 9, Amsterdam, Netherlands.
Andrew Y F Li YimAmsterdam UMC location University of Amsterdam, Department of Gastroenterology and Hepatology, Meibergdreef 9, Amsterdam, Netherlands.
Amsterdam University Medical Centers · NLUniversity of Amsterdam · NLJohn Radcliffe Hospital · GBOxford BioMedica (United Kingdom) · GBUniversity of Edinburgh · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

aimsOver the past decade, the DNA methylome has been increasingly studied in peripheral blood of inflammatory bowel disease [IBD] patients. However, a comprehensive summary and meta-analysis of peripheral blood leukocyte [PBL] DNA methylation studies has thus far not been conducted. Here, we systematically reviewed all available literature up to February 2022 and summarized the observations by means of meta-analysis.

methodsWe conducted a systematic search and critical appraisal of IBD-associated DNA methylation studies in PBL using the biomarker-based cross-sectional studies [BIOCROSS] tool. Subsequently, we performed meta-analyses on the summary statistics obtained from epigenome-wide association studies [EWAS] that included patients with Crohn's disease [CD], ulcerative colitis [UC] and/or healthy controls [HC].

resultsAltogether, we included 15 studies for systematic review. Critical appraisal revealed large methodological and outcome heterogeneity between studies. Summary statistics were obtained from four studies based on a cumulative 552 samples [177 CD, 132 UC and 243 HC]. Consistent differential methylation was identified for 256 differentially methylated probes [DMPs; Bonferroni-adjusted p ≤ 0.05] when comparing CD with HC and 103 when comparing UC with HC. Comparing IBD [CD + UC] with HC resulted in 224 DMPs. Importantly, several of the previously identified DMPs, such as VMP1/TMEM49/MIR21 and RPS6KA2, were consistently differentially methylated across all studies.

conclusionMethodological homogenization of IBD epigenetic studies is needed to allow for easier aggregation and independent validation. Nonetheless, we were able to confirm previous observations. Our results can serve as the basis for future IBD epigenetic biomarker research in PBL.

Indexed as

Colitis, UlcerativeCrohn DiseaseInflammatory Bowel DiseasesCross-Sectional StudiesDNA MethylationHumansMembrane ProteinsMembrane ProteinsVMP1 protein, humanbiomarkersDNA methylationepigeneticsinflammatory bowel diseasessystematic review and meta-analysis

Identifiers

PMID35998097
PMCPMC10024549
OpenAlexW4292774810

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

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.