Evidence map›Paper›PMID 26823690›Full record

ArticleClinical epigenetics2016

Epigenetic associations of type 2 diabetes and BMI in an Arab population.

Wadha A Al Muftah, Mashael Al-Shafai, Shaza B Zaghlool, Alessia Visconti, Pei-Chien Tsai, Pankaj Kumar, Tim Spector, Jordana Bell, Mario Falchi, Karsten Suhre

Open access · goldAbstract read
In one paragraph

Article in Clinical epigenetics, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 88 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
88citing papers in PubMed, 8 pooled it
8.9field-weighted citation impact, top 2% 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

88 citing papers in PubMed, 8 syntheses or guidelines pooled it, 164 citations in OpenAlex.

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  12. Metformin Alone and in Combinations Alter the Methylation Patterns ofEndocrine, metabolic & immune disorders drug targets · 2026
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28 more citing papers are in PubMed but not listed here.

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

10 authors at 3 institutions in 2 countries.

Wadha A Al Muftah *Bioinformatics Core, Weill Cornell Medical College in Qatar, Qatar Foundation-Education City, PO Box 24144, Doha, Qatar.
Mashael Al-Shafai *Bioinformatics Core, Weill Cornell Medical College in Qatar, Qatar Foundation-Education City, PO Box 24144, Doha, Qatar.
Shaza B Zaghlool *Bioinformatics Core, Weill Cornell Medical College in Qatar, Qatar Foundation-Education City, PO Box 24144, Doha, Qatar.
Alessia ViscontiDepartment of Twin Research & Genetic Epidemiology, King's College London, London, SE1 7EH UK.
Pei-Chien TsaiDepartment of Twin Research & Genetic Epidemiology, King's College London, London, SE1 7EH UK.
Pankaj KumarBioinformatics Core, Weill Cornell Medical College in Qatar, Qatar Foundation-Education City, PO Box 24144, Doha, Qatar.
Tim SpectorDepartment of Twin Research & Genetic Epidemiology, King's College London, London, SE1 7EH UK.
Jordana BellDepartment of Twin Research & Genetic Epidemiology, King's College London, London, SE1 7EH UK.
Mario FalchiDepartment of Genomics of Common Disease, Imperial College London, London, UK.
Karsten SuhreBioinformatics Core, Weill Cornell Medical College in Qatar, Qatar Foundation-Education City, PO Box 24144, Doha, Qatar.
King's College London · GBWeill Cornell Medical College in Qatar · QAGenomics England · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundThe prevalence of type 2 diabetes (T2D) and obesity has dramatically increased within a few generations, reaching epidemic levels. In addition to genetic risk factors, epigenetic mechanisms triggered by changing environment are investigated for their role in the pathogenesis of these complex diseases. Epigenome-wide association studies (EWASs) have revealed significant associations of T2D, obesity, and BMI with DNA methylation. However, populations from the Middle East, where T2D and obesity rates are highest worldwide, have not been investigated so far.

methodsWe performed the first EWAS in an Arab population with T2D and BMI and attempted to replicate 47 EWAS associations previously reported in Caucasians. We used the Illumina Infinium HumanMethylation450 BeadChip to quantify DNA methylation in whole blood DNA from 123 subjects of 15 multigenerational families from Qatar. To investigate the effect of differing genetic background and environment on the epigenetic associations, we further assessed the effect of replicated loci in 810 twins from UK.

resultsOur EWAS suggested a novel association between T2D and cg06721411 (DQX1; p value = 1.18 × 10(-9)). We replicated in the Qatari population seven CpG associations with BMI (SOCS3, p value = 3.99 × 10(-6); SREBF1, p value = 4.33 × 10(-5); SBNO2, p value = 5.87 × 10(-5); CPT1A, p value = 7.99 × 10(-5); PRR5L, p value = 1.85 × 10(-4); cg03078551, intergenic region on chromosome 17; p value = 1.00 × 10(-3); LY6G6E, p value = 1.10 × 10(-3)) and one with T2D (TXNIP, p value = 2.46 × 10(-5)). All the associations were further confirmed in the UK cohort for both BMI and T2D. Meta-analysis increased the significance of the observed associations and revealed strong heterogeneity of the effect sizes (apart from CPT1A), although associations at these loci showed concordant direction in the two populations.

conclusionsOur study replicated eight known CpG associations with T2D or BMI in an Arab population. Heterogeneity of the effects at all loci except CPT1A between the Qatari and UK studies suggests that the underlying mechanisms might depend on genetic background and environmental pressure. Our EWAS results provide a basis for comparison with other ethnicities.

Indexed as

Body Mass IndexAdolescentAdultAgedAged, 80 and overArabsCpG IslandsDiabetes Mellitus, Type 2Diseases in TwinsDNA MethylationEpigenesis, GeneticFemaleGenome-Wide Association StudyHumansMaleMiddle Aged

Identifiers

PMID26823690
PMCPMC4730771
OpenAlexW2279723444

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.