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Association of inflammation with worsening HOMA-insulin resistance

K Park1, M Steffes, D-H Lee

  • 1Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, 1300 South 2nd Street, Suite 300, Minneapolis, MN 55454, USA.

Diabetologia
|August 15, 2009
PubMed

Insights

C-reactive protein (CRP) is linked to insulin resistance. Even after accounting for obesity, CRP independently predicts current and future insulin resistance, highlighting its role in metabolic health.

Area of Science:

  • Biomedical research
  • Metabolic health
  • Inflammation markers

Background:

  • Low-grade inflammation, indicated by C-reactive protein (CRP), is increasingly recognized as a factor in metabolic dysfunction.
  • Insulin resistance is a key precursor to type 2 diabetes and cardiovascular disease.

Purpose of the Study:

  • To investigate the cross-sectional and longitudinal associations between C-reactive protein (CRP) and insulin resistance.
  • To determine if these associations are independent of obesity and oxidative stress.

Main Methods:

  • Utilized data from the Coronary Artery Risk Development in Young Adults (CARDIA) study (1992-2006).
  • Measured C-reactive protein (CRP) and insulin resistance via homeostasis model assessment (HOMA-IR).
  • Employed cross-sectional and longitudinal (5-year follow-up) analyses, controlling for body fat and oxidative stress markers.

Main Results:

  • A significant positive association was observed between CRP and insulin resistance, both cross-sectionally and longitudinally.
  • The association between CRP and HOMA-IR remained statistically significant after adjusting for body fat and oxidative stress.
  • Higher CRP levels consistently predicted increased HOMA-IR over time, but not vice versa.

Conclusions:

  • C-reactive protein (CRP) is independently associated with concurrent and future insulin resistance.
  • Obesity explains a significant portion of the CRP-insulin resistance link, but does not fully account for it.
  • Findings suggest CRP is a valuable marker for predicting insulin resistance beyond its association with adiposity.
Abstract

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