Evidence map›Paper›PMID 23462794›Full record

ArticleDiabetologia2013

Identification of CpG-SNPs associated with type 2 diabetes and differential DNA methylation in human pancreatic islets.

T A Dayeh, A H Olsson, P Volkov, P Almgren, T Rönn, C Ling

Open access · hybridAbstract read
In one paragraph

Article in Diabetologia, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 114 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
114citing papers in PubMed, 2 pooled it
24.4field-weighted citation impact, top 1% 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

114 citing papers in PubMed, 2 syntheses or guidelines pooled it, 196 citations in OpenAlex.

  1. Pooled it
  2. Epigenetics and human obesity.International journal of obesity (2005) · 2015
    Pooled it
  3. Different Methylation of CpG-SNPs in Behcet's Disease.BioMed research international · 2019
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  7. Article
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  9. MAP kinase phosphatases in metabolic diseases.Trends in endocrinology and metabolism: TEM · 2026
    Review
  10. Review
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  12. Alternative Splicing Regulation in Metabolic Disorders.Obesity reviews : an official journal of the International Association for the Study of Obesity · 2025
    Review
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  14. Article
  15. Article
  16. Article
  17. ANRIL: A Long Noncoding RNA in Age-related Diseases.Mini reviews in medicinal chemistry · 2024
    Review
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  19. Review
  20. Review

54 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

T A DayehDepartment of Clinical Sciences, Epigenetics and Diabetes, Lund University Diabetes Centre, Clinical Research Centre, Scania University Hospital, Jan Waldenströmsgata 35, 205 02 Malmö, Sweden.
A H Olsson
P Volkov
P Almgren
T Rönn
C Ling
Lund University · SEScania (Sweden) · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aims/hypothesisTo date, the molecular function of most of the reported type 2 diabetes-associated loci remains unknown. The introduction or removal of cytosine-phosphate-guanine (CpG) dinucleotides, which are possible sites of DNA methylation, has been suggested as a potential mechanism through which single-nucleotide polymorphisms (SNPs) can affect gene function via epigenetics. The aim of this study was to examine if any of 40 SNPs previously associated with type 2 diabetes introduce or remove a CpG site and if these CpG-SNPs are associated with differential DNA methylation in pancreatic islets of 84 human donors.

methodsDNA methylation was analysed using pyrosequencing.

resultsWe found that 19 of 40 (48%) type 2 diabetes-associated SNPs introduce or remove a CpG site. Successful DNA methylation data were generated for 16 of these 19 CpG-SNP loci, representing the candidate genes TCF7L2, KCNQ1, PPARG, HHEX, CDKN2A, SLC30A8, DUSP9, CDKAL1, ADCY5, SRR, WFS1, IRS1, DUSP8, HMGA2, TSPAN8 and CHCHD9. All analysed CpG-SNPs were associated with differential DNA methylation of the CpG-SNP site in human islets. Moreover, six CpG-SNPs, representing TCF7L2, KCNQ1, CDKN2A, ADCY5, WFS1 and HMGA2, were also associated with DNA methylation of surrounding CpG sites. Some of the type 2 diabetes CpG-SNP sites that exhibit differential DNA methylation were further associated with gene expression, alternative splicing events determined by splice index, and hormone secretion in the human islets. The 19 type 2 diabetes-associated CpG-SNPs are in strong linkage disequilibrium (r² > 0.8) with a total of 295 SNPs, including 91 CpG-SNPs. CONCLUSIONS/

interpretationOur results suggest that the introduction or removal of a CpG site may be a molecular mechanism through which some of the type 2 diabetes SNPs affect gene function via differential DNA methylation and consequently contributes to the phenotype of the disease.

Indexed as

CpG IslandsDNA MethylationEpigenesis, GeneticPolymorphism, Single NucleotideAgedAlternative SplicingCohort StudiesDiabetes Mellitus, Type 2FemaleGene Expression RegulationGenetic Association StudiesHumansInsulinInsulin SecretionIslets of LangerhansLinkage DisequilibriumInsulinRNA, Messenger

Identifiers

PMID23462794
PMCPMC3622750
OpenAlexW2144460023

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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.