Endothelial Dysfunction Plays a Key Role in Increasing Cardiovascular Risk in Type 2 Diabetes The Hoorn Study

Thomas T. van Sloten, Ronald M. A. Henry, Jacqueline M. Dekker, Giel Nijpels, Thomas Unger, Miranda T. Schram, Coen D. A. Stehouwer*

*Corresponding author for this work

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Abstract

In the pathogenesis of cardiovascular events, interaction between risk factors has seldom been identified. However, endothelial dysfunction on the one hand and type 2 diabetes mellitus, impaired glucose metabolism (IGM), and insulin resistance on the other may act synergistically (ie, interact) in the development of cardiovascular disease. We therefore investigated the interaction between endothelial dysfunction and type 2 diabetes mellitus, IGM, and insulin resistance with regard to risk of cardiovascular events. In a prospective population-based cohort (n=445; 69 years; 55% women; 23% type 2 diabetes mellitus, 28% IGM [by design]), endothelial dysfunction (brachial artery flow-mediated dilatation), glucose tolerance (oral glucose tolerance test), and insulin sensitivity (homeostasis model assessment for insulin resistance [HOMA2-IR]) were determined. After a median follow-up of 7.6 years, 106 participants had had a cardiovascular event. After adjustments, 1 SD less flow-mediated dilatation was associated with cardiovascular events in type 2 diabetes mellitus (hazard ratio 1.69 [95% confidence interval, 1.14-2.52]) and IGM (1.50 [0.95-2.37]) and among those in the highest HOMA2-IR tertile (1.92 [1.42-2.60]), but not in normal glucose metabolism (0.85 [0.63-1.16]) or among those in the lower 2 HOMA2-IR tertiles combined (0.85 [0.65-1.12]). Interaction between flow-mediated dilatation and type 2 diabetes mellitus, IGM, or insulin resistance was present on an additive (relative excess risk caused by interaction >0) and on a multiplicative scale (P interaction
Original languageEnglish
Pages (from-to)1299-U293
JournalHypertension
Volume64
Issue number6
DOIs
Publication statusPublished - Dec 2014

Keywords

  • cardiovascular diseases
  • endothelium
  • epidemiology
  • insulin resistance
  • prospective studies
  • type 2 diabetes mellitus

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