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Vascular Medicine, Vol. 12, No. 4, 299-309 (2007)
DOI: 10.1177/1358863X07083387

An overview of cytokine interactions in atherosclerosis and implications for peripheral arterial disease

H.R.S. Girn

Leeds Vascular Institute, Leeds General Infirmary, Leeds, UK, hrsgirn{at}aol.com

N.M. Orsi

Pathology & Tumour Biology, Leeds Institute of Molecular Medicine, St James University Hospital, Leeds, UK

S. Homer-Vanniasinkam

Leeds Vascular Institute, Leeds General Infirmary, Leeds, UK

Over the last three decades, a surge in research into the inflammatory pathophysiology of atherosclerosis has highlighted an array of cytokines and other inflammatory mediators associated with underlying inflammatory burden. The ability to identify and simultaneously measure multiple cytokines in peripheral blood highlights their potential as biomarkers of atherosclerosis. This has prompted much research in vascular medicine to identify the `at-risk' groups for atherostenotic or atheroaneurysmal disease. This review is compiled with similar intentions and aims to discern the relevant evidence for cytokine profiling in peripheral arterial disease (PAD), where such information is lacking, while providing a holistic overview of cytokine interactions in atherosclerosis. This is pertinent given that cytokine profiles from coronary artery disease and aortic aneurysm studies cannot be directly extrapolated to PAD due to differences in inflammatory environments that exist in these conditions. Whilst plaque morphology and blood rheology play an important role in the cardiac manifestations of atherosclerosis, tissue thrombogenecity is very important in PAD. Further, cytokines act in concert rather than in isolation in a disease process, and no single cytokine in a cross-sectional model is able to serve as an absolute screening marker. Thus, it is essential to understand the regulation of cytokine production in atherosclerosis prior to evaluating the viability and merits of a multimarker approach for clinical risk stratification in PAD.

Key Words: atherosclerosis • biomarkers • cytokines • interleukins • peripheral arterial disease


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