Evidence map›Paper›PMID 26159428›Full record

ArticleBMC genetics2015

Iron and hepcidin as risk factors in atherosclerosis: what do the genes say?

Tessel E Galesloot, Luc L Janss, Stephen Burgess, Lambertus A L M Kiemeney, Martin den Heijer, Jacqueline de Graaf, Suzanne Holewijn, Beben Benyamin, John B Whitfield, Dorine W Swinkels and 1 more

Open access · diamondAbstract read
In one paragraph

Article in BMC genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 3 pooled it
2.3field-weighted citation impact, top 12% 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

17 citing papers in PubMed, 3 syntheses or guidelines pooled it, 29 citations in OpenAlex.

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  16. Cohort Profile: The Nijmegen Biomedical Study (NBS).International journal of epidemiology · 2017
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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

11 authors at 6 institutions in 4 countries.

Tessel E GaleslootRadboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands. tessel.galesloot@radboudumc.nl.
Luc L JanssDepartment of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark. ljanss@icloud.com.
Stephen BurgessDepartment of Public Health and Primary Care, University of Cambridge, Cambridge, UK. sb452@medschl.cam.ac.uk.
Lambertus A L M KiemeneyRadboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands. Bart.Kiemeney@radboudumc.nl.
Martin den HeijerDepartment of Internal Medicine, VU Medical Centre, Amsterdam, The Netherlands. m.denheijer@vumc.nl.
Jacqueline de GraafDepartment of General Internal Medicine, Division of Vascular Medicine, Radboud university medical center, Nijmegen, The Netherlands. Jacqueline.deGraaf@radboudumc.nl.
Suzanne HolewijnDepartment of General Internal Medicine, Division of Vascular Medicine, Radboud university medical center, Nijmegen, The Netherlands. s.holewijn@upcmail.nl.
Beben BenyaminThe University of Queensland, Queensland Brain Institute, St Lucia, Queensland, 4072, Australia. b.benyamin@uq.edu.au.
John B WhitfieldQIMR Berghofer Medical Research Institute, Brisbane, Queensland, 4029, Australia. John.Whitfield@qimrberghofer.edu.au.
Dorine W SwinkelsRadboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands. Dorine.Swinkels@radboudumc.nl.
Sita H VermeulenRadboud university medical center, Radboud Institute for Health Sciences, Nijmegen, The Netherlands. sita.vermeulen@radboudumc.nl.
Radboud University Nijmegen · NLAarhus University · DKAmsterdam UMC Location Vrije Universiteit Amsterdam · NLQIMR Berghofer Medical Research Institute · AUThe University of Queensland · AUUniversity of Cambridge · GB

Funding

British Heart Foundation RG/08/014/24067Medical Research Council MR/L003120/1
6 · The paper itself

Abstract

backgroundPrevious reports suggested a role for iron and hepcidin in atherosclerosis. Here, we evaluated the causality of these associations from a genetic perspective via (i) a Mendelian randomization (MR) approach, (ii) study of association of atherosclerosis-related single nucleotide polymorphisms (SNPs) with iron and hepcidin, and (iii) estimation of genomic correlations between hepcidin, iron and atherosclerosis.

resultsAnalyses were performed in a general population sample. Iron parameters (serum iron, serum ferritin, total iron-binding capacity and transferrin saturation), serum hepcidin and genome-wide SNP data were available for N = 1,819; non-invasive measurements of atherosclerosis (NIMA), i.e., presence of plaque, intima media thickness and ankle-brachial index (ABI), for N = 549. For the MR, we used 12 iron-related SNPs that were previously identified in a genome-wide association meta-analysis on iron status, and assessed associations of individual SNPs and quartiles of a multi-SNP score with NIMA. Quartile 4 versus quartile 1 of the multi-SNP score showed directionally consistent associations with the hypothesized direction of effect for all NIMA in women, indicating that increased body iron status is a risk factor for atherosclerosis in women. We observed no single SNP associations that fit the hypothesized directions of effect between iron and NIMA, except for rs651007, associated with decreased ferritin concentration and decreased atherosclerosis risk. Two of six NIMA-related SNPs showed association with the ratio hepcidin/ferritin, suggesting that an increased hepcidin/ferritin ratio increases atherosclerosis risk. Genomic correlations were close to zero, except for hepcidin and ferritin with ABI at rest [-0.27 (SE 0.34) and -0.22 (SE 0.35), respectively] and ABI after exercise [-0.29 (SE 0.34) and -0.30 (0.35), respectively]. The negative sign indicates an increased atherosclerosis risk with increased hepcidin and ferritin concentrations.

conclusionsOur results suggest a potential causal role for hepcidin and ferritin in atherosclerosis, and may indicate that iron status is causally related to atherosclerosis in women.

Indexed as

AdultAgedAtherosclerosisFemaleFerritinsGenetic Association StudiesGenetic Predisposition to DiseaseGenome-Wide Association StudyGenotypeHepcidinsHumansIronMaleMiddle AgedPlaque, AtheroscleroticPolymorphism, Single NucleotideFerritinsHepcidinsIron

Identifiers

PMID26159428
PMCPMC4498499
OpenAlexW1665276433

What OpenQuestion holds

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LicenceCC BY
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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.