Cited by 75Diabetes, Cardiovascular Risks, and LipoproteinsAdipokines, Inflammation, and Metabolic DiseasesCardiovascular Disease and Adiposity

Insulin resistance and the metabolic syndrome—or the pitfalls of epidemiology

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Yudkin, J. S.·2007·Diabetologia

Abstract

The clustering of dyslipidaemia, hypertension and glucose intolerance, predominantly in overweight individuals, has been ascribed many names, including syndrome X and the metabolic syndrome. In Reaven's original description of syndrome X, a central aetiological role was attributed to insulin resistance, and this assumption has remained as the dominant paradigm for the metabolic syndrome. There are a number of conceptual problems in such a model, particularly those arising from observations that several novel markers, including measures of endothelial dysfunction and of low-grade inflammation, are as closely related to insulin resistance as are the classic components of the syndrome. Because it is difficult to envisage how these traits might develop as a consequence of insulin resistance, such observations indicate the need for a new paradigm to explain the mechanisms of association better. It has been proposed that a state of low-grade inflammation, consequent upon the production of adipocytokines, particularly from truncal fat, explains the observed relationships between insulin resistance and endothelial dysfunction better than does a model revolving around insulin resistance. Furthermore, the inflammatory cytokines generated from adipose tissue may influence vessel endothelial function without elevations in circulating concentrations. This review alludes to several problems inherent in the epidemiological method in understanding disease mechanisms. These include crude biological measures, the use of venous systemic fasting samples, imprecision of assays, naive physiological models, simplistic statistical approaches and, without clinical trials, an inability to test causation. Integrated systems biology needs more complex approaches to investigate disease mechanisms, involving cell, organ, whole organism and population studies.

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Authors
Yudkin, J. S.
Affiliations
University College London (GB)
Corresponding author
Yudkin, J. S.
Venue
Diabetologia
Published
2007-06-26
Volume
50
Issue
8
Pages
1576-1586
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W1966732395
Cited by
75
References
93
Citations by year
2026: 3 · 2025: 1 · 2023: 1 · 2022: 2 · 2020: 2 · 2019: 1 · 2018: 1 · 2017: 5 · 2016: 5 · 2015: 3 · 2014: 4 · 2013: 9 · 2012: 1
FWCI
1.48
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Disease and Adiposity
Keywords
insulin resistance, metabolic syndrome, dyslipidemia, hypertension, impaired glucose tolerance, endothelial dysfunction, low-grade inflammation, adipokines, truncal fat, adipose tissue inflammation, disease mechanisms, causality, systems biology
MeSH terms
Endothelium, Humans, Inflammation, Insulin, Insulin Resistance, Models, Biological, Metabolic Syndrome

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