Cited by 1,146Genetic Associations and EpidemiologyRheumatoid Arthritis Research and TherapiesLipoproteins and Cardiovascular Health

The interleukin-6 receptor as a target for prevention of coronary heart disease: a mendelian randomisation analysis

Open access
Daniel I. Swerdlow·2012·The Lancet

Abstract

BACKGROUND: A high circulating concentration of interleukin 6 is associated with increased risk of coronary heart disease. Blockade of the interleukin-6 receptor (IL6R) with a monoclonal antibody (tocilizumab) licensed for treatment of rheumatoid arthritis reduces systemic and articular inflammation. However, whether IL6R blockade also reduces risk of coronary heart disease is unknown. METHODS: Applying the mendelian randomisation principle, we used single nucleotide polymorphisms (SNPs) in the gene IL6R to evaluate the likely efficacy and safety of IL6R inhibition for primary prevention of coronary heart disease. We compared genetic findings with the effects of tocilizumab reported in randomised trials in patients with rheumatoid arthritis. FINDINGS: In 40 studies including up to 133,449 individuals, an IL6R SNP (rs7529229) marking a non-synonymous IL6R variant (rs8192284; p.Asp358Ala) was associated with increased circulating log interleukin-6 concentration (increase per allele 9·45%, 95% CI 8·34-10·57) as well as reduced C-reactive protein (decrease per allele 8·35%, 95% CI 7·31-9·38) and fibrinogen concentrations (decrease per allele 0·85%, 95% CI 0·60-1·10). This pattern of effects was consistent with IL6R blockade from infusions of tocilizumab (4-8 mg/kg every 4 weeks) in patients with rheumatoid arthritis studied in randomised trials. In 25,458 coronary heart disease cases and 100,740 controls, the IL6R rs7529229 SNP was associated with a decreased odds of coronary heart disease events (per allele odds ratio 0·95, 95% CI 0·93-0·97, p=1·53×10(-5)). INTERPRETATION: On the basis of genetic evidence in human beings, IL6R signalling seems to have a causal role in development of coronary heart disease. IL6R blockade could provide a novel therapeutic approach to prevention of coronary heart disease that warrants testing in suitably powered randomised trials. Genetic studies in populations could be used more widely to help to validate and prioritise novel drug targets or to repurpose existing agents and targets for new therapeutic uses. FUNDING: UK Medical Research Council; British Heart Foundation; Rosetrees Trust; US National Heart, Lung, and Blood Institute; Du Pont Pharma; Chest, Heart and Stroke Scotland; Wellcome Trust; Coronary Thrombosis Trust; Northwick Park Institute for Medical Research; UCLH/UCL Comprehensive Medical Research Centre; US National Institute on Aging; Academy of Finland; Netherlands Organisation for Health Research and Development; SANCO; Dutch Ministry of Public Health, Welfare and Sports; World Cancer Research Fund; Agentschap NL; European Commission; Swedish Heart-Lung Foundation; Swedish Research Council; Strategic Cardiovascular Programme of the Karolinska Institutet; Stockholm County Council; US National Institute of Neurological Disorders and Stroke; MedStar Health Research Institute; GlaxoSmithKline; Dutch Kidney Foundation; US National Institutes of Health; Netherlands Interuniversity Cardiology Institute of the Netherlands; Diabetes UK; European Union Seventh Framework Programme; National Institute for Healthy Ageing; Cancer Research UK; MacArthur Foundation.

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  • Genetic evidence suggests that IL-6 may be causal for atherosclerotic cardiovascular disease.

    “genetic evidence suggests that IL-6 may be causal for atherosclerotic cardiovascular disease, 24,25”

    From Comprehensive Long-Term Changes in Cardiovascular Risk Biomarkers With Tirzepatide (2026) · cites this paper as [25]

    The Discussion reports strong genetic evidence for a causal role of IL6R signalling in coronary heart disease. The claim broadens that finding to IL-6 itself and to atherosclerotic cardiovascular disease generally; the cited passages do not establish those broader claims. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • GWAS, meta-analysis, exome analysis and SNP mapping have associated IL-6, IL-6R and gp130 with inflammatory diseases such as RA and coronary artery disease.

    “Genome-wide association studies (GWAS), meta-analysis, exome analysis and single nucleotide polymorphism (SNP) mapping have associated IL-6, IL-6R and gp130 with inflammatory diseases such as RA and coronary artery disease (263–269).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [265]

    The Discussion (page not specified) reports that an IL6R variant was associated with reduced coronary heart disease risk, and the Methods describe analysis of IL6R SNPs. The paper discusses rheumatoid arthritis in connection with tocilizumab trials, but does not report genetic associations linking IL6 or gp130 to rheumatoid arthritis, or exome analyses establishing the broader claim. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Associations were identified between IL6R pQTLs and CAD, rheumatoid arthritis and 7 other disease traits, thereby supporting the findings of the study.

    “We also identified associations between IL6R pQTLs and CAD, rheumatoid arthritis and 7 other disease traits (Supplementary Table S12), thereby supporting the findings of the study69.”

    From Genetic determinants of plasma protein levels in the Estonian population (2024) · cites this paper as [69]

    The Results report an association between an IL6R variant and reduced coronary heart disease risk. The paper discusses rheumatoid arthritis in connection with trials of the IL6R-blocking drug tocilizumab, but does not report an association between IL6R variants and rheumatoid arthritis. The seven other traits are presented as the citing authors’ own findings, not as findings attributed to this source. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • One large study reported a near significant effect (P = 0.06) of a functional variant causing impaired signalling at the IL-6 receptor with reduced risk of developing diabetes mellitus.

    “One large study reported a near significant effect ( P = 0.06) of a functional variant causing impaired signalling at the IL-6 receptor with reduced risk of developing diabetes mellitus 44.”
  • A previous study has shown a link between IL6R and CAD.

    “A previous study has shown a link between IL6R and CAD69.”

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Authors
Swerdlow, D. I.
Affiliations
University College London (GB)
Corresponding author
Daniel I. Swerdlow
Venue
The Lancet
Publisher
Elsevier BV
Published
2012-03
Volume
379
Issue
9822
Pages
1214-1224
ISSN
  • 0099-5355 (ISSN-L)
  • 0140-6736
OpenAlex
W2143727405
Cited by
1,146
References
100
Citations by year
2026: 78 · 2025: 86 · 2024: 94 · 2023: 89 · 2022: 84 · 2021: 110 · 2020: 89 · 2019: 80 · 2018: 74 · 2017: 77 · 2016: 67 · 2015: 56 · 2014: 63 · 2013: 65 · 2012: 32
FWCI
8.45
Type
journal article
Language
en
Open access
Locations
  • The Lancet (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Pure Amsterdam UMC (publishedVersion, other-oa)
  • Bristol Research (University of Bristol) (publishedVersion, cc-by)
  • LSHTM Research Online (London School of Hygiene and Tropical Medicine) (acceptedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion, other-oa)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • ORCA Online Research @Cardiff (Cardiff University) (submittedVersion)
  • Lithuanian University of Health Sciences (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion)
Funders
  • MRC population health scientist fellowship (G0802432)
  • National Institutes of Health (NIH), the MRC, and the British Heart Foundation (BHF (RG/10/12/28456)
  • BHF (Schillingford) clinical training fellowship (FS/07/011)
  • US National Heart, Lung, and Blood Institute (HHSN268200900009C)
  • National Human Genome Research Institute (U01HG005152)
  • Cancer Research UK (C1298/A8362, C150/A5660)
  • IKEM (Czech Republic) (00023001)
  • National Institute for Healthy Ageing (05060810)
  • NIH/NHLBI (5215810-55000000041)
  • BHF (RG 08/008 and PG/07/133/24260, RG/04/003)
  • Netherlands Organisation for Health Research and Development (90700342)
  • BHF senior fellowship (FS 05/125)
  • British Heart Foundation (RG/10/12/28456)
  • contract no. (HHSN268200625226C)
  • NHLBI in collaboration with MESA investigators (N01 HC-95159, N01-HC-95160, N01-HC-95161, N01-HC-95162, N01-HC-95163, N01-HC-95164, N01-HC-95165, N01-HC-95166, N01-HC-95167, N01-HC-95168, N01-HC-95169, and RR-024156)
  • Wellcome Trust (064947/Z/01/Z and 081081/Z/06/Z)
  • National Institute on Aging (1R01 AG23522-01)
  • Intramural Research Program of the National Institute on Aging, NIH, Department of Health and Human Services (Z01 AG000954-06, ISGS (R01 NS42733), (R01 NS39987), Z01 AG000015-50)
  • European Commission (QLG1-CT-2002-00896)
  • Dutch Kidney Foundation (Grant E033)
  • GENECURE (FP-6 LSHM CT 2006 037697)
  • NIH (grant LM010098)
  • The Netherlands Organisation for Health Research and Development (grant 916.761.70)
  • European Union's Seventh Framework Programme (FP7/2007-2013)
  • NHLBI (RFP-NHLBI-WH-11-10, HL36310)
  • Veni grant Organization for Scientific Research (NWO) (2001.064)
  • NIH; National Institute on Aging (AG13196)
  • MRC (grant NHLBI 33014)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Health Sciences › Medicine › Rheumatology › Rheumatoid Arthritis Research and Therapies
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
IL-6 receptor, tocilizumab, coronary artery disease, primary prevention, C-reactive protein, fibrinogen, rheumatoid arthritis, genetic variants, monoclonal antibodies
MeSH terms
Coronary Disease, Gene Frequency, Genotype, Humans, Phenotype, Genetic Variation, Signal Transduction, Randomized Controlled Trials as Topic, Treatment Outcome, Inflammation Mediators, Receptors, Interleukin-6, Polymorphism, Single Nucleotide, Genetic Association Studies, Mendelian Randomization Analysis, Antibodies, Monoclonal, Humanized

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