Interleukin-6 and incident coronary heart disease: Results from the British Women's Heart and Health Study.


Fraser, A; May, M; Lowe, G; Rumley, A; Smith, GD; Ebrahim, S; Lawlor, DA; (2008) Interleukin-6 and incident coronary heart disease: Results from the British Women's Heart and Health Study. Atherosclerosis, 202 (2). pp. 567-72. ISSN 0021-9150 DOI: https://doi.org/10.1016/j.atherosclerosis.2008.04.048

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Abstract

INTRODUCTION: Inflammatory mechanisms may play a role in the pathogenesis of atherosclerosis and its complications. Interleukin-6 (IL-6) is an 'upstream' pro-inflammatory cytokine that stimulates hepatocytes to synthesize acute phase response proteins such as C-reactive protein (CRP) and fibrinogen. The purpose of this study was to determine whether IL-6 is associated with incident coronary heart disease (CHD) events independently of established risk factors and to examine its predictive ability for future CHD events. METHODS: Data from the British Women's Heart and Health Study, a prospective cohort of randomly sampled British women 60-79 years old at baseline was used. Three thousand five hundred and eighty-one women had no evidence of coronary heart disease at baseline and were followed up for a median of 4.6 years. Cox proportional hazard models were used to estimate the association of IL-6 with incident CHD. RESULTS: The age-adjusted association of IL-6 with the risk of CHD (hazard ratio, HR per doubling of IL-6=1.26, 95% CI 1.10, 1.43) was attenuated when adjusting for established CHD risk factors (HR per doubling of IL-6=1.13, 95% CI 0.97, 1.31). The main confounders of the association of IL-6 and CHD risk were smoking and forced expiratory volume (FEV(1)). Further attenuation was observed when additional terms for components of the metabolic syndrome were added into the model (HR=1.08, 95% CI 0.93, 1.27). CONCLUSIONS: There was no strong evidence of an association between IL-6 and incident CHD in older British women after controlling for established CHD risk factors. Studies with measures of lung function and socio-economic position are needed to further investigate the role of IL-6 in CHD etiology.

Item Type: Article
Faculty and Department: Faculty of Epidemiology and Population Health > Dept of Non-Communicable Disease Epidemiology
Research Centre: Centre for Global Non-Communicable Diseases (NCDs)
PubMed ID: 18556001
Web of Science ID: 263427300032
URI: http://researchonline.lshtm.ac.uk/id/eprint/7487

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