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Published on: April 1, 2015
Soluble intercellular adhesion molecule-1, soluble vascular adhesion molecule-1, and the development of symptomatic
Aruna D Pradhan1, Nader Rifai, Paul M Ridker
1Center for Cardiovascular Disease Prevention, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass 02115-1204, USA.
Insights
Elevated soluble intercellular adhesion molecule-1 (sICAM-1) levels predict peripheral arterial disease (PAD) development in healthy men. This finding highlights sICAM-1 as a potential biomarker for early systemic atherosclerosis risk.
Area of Science:
- Cardiovascular Medicine
- Biomarkers
- Atherosclerosis Research
Background:
- Soluble cellular adhesion molecules are linked to coronary events.
- The association with early systemic atherosclerosis is uncertain.
Purpose of the Study:
- To investigate the relationship between soluble intercellular adhesion molecule-1 (sICAM-1) and soluble vascular cell adhesion molecule-1 (sVCAM-1) levels and the development of symptomatic peripheral arterial disease (PAD).
Main Methods:
- Prospective, nested case-control study of 14,916 middle-aged men.
- Assessed baseline sICAM-1 and sVCAM-1 levels.
- Followed participants for 9 years for PAD development.
- Statistical analyses adjusted for risk factors.
Main Results:
- Higher baseline sICAM-1 levels were observed in men who developed PAD (P=0.005).
- Elevated sICAM-1 was significantly associated with increased PAD risk (OR 3.5, P=0.008) after adjustments.
- sVCAM-1 levels were not associated with PAD development.
Conclusions:
- Elevated sICAM-1 is an independent predictor of accelerated atherosclerosis.
- sICAM-1 may serve as a biomarker for PAD risk in healthy men.
Background:
Elevated levels of soluble cellular adhesion molecules have been linked to the development of occlusive coronary events in otherwise healthy individuals. It is not certain, however, whether similar relationships exist for the development of early systemic atherosclerosis.
Methods And Results:
In a prospective, nested case-control study conducted among 14 916 middle-aged men, we evaluated the relationship between baseline levels of soluble intercellular adhesion molecule-1 (sICAM-1), soluble vascular cell adhesion molecule-1 (sVCAM-1), and the subsequent development of symptomatic peripheral arterial disease (PAD) during a 9-year follow-up period. Median levels of sICAM-1 but not sVCAM-1 were significantly higher at baseline among men who developed PAD than among those who did not (285.2 versus 267.8 ng/mL [P=0.005] for sICAM-1 and 701.0 versus 709.3 ng/mL [P=0.8] for sVCAM-1). In analyses adjusted for age and smoking, the odds ratio in the highest compared with the lowest quartile of sICAM-1 was 3.9 (95% CI 1.7 to 8.6; P(trend)=0.001). After additional adjustment for lipid and nonlipid risk factors, including C-reactive protein, elevated sICAM-1 remained significantly associated with subsequent PAD (OR 3.5, 95% CI 1.4 to 8.5, P(trend)=0.008). Whereas a monotonic dose-response relationship was evident over the full spectrum of ICAM-1 levels, elevated sVCAM-1 was not associated with future PAD in either age- and smoking-adjusted or fully adjusted models.
Conclusions:
Elevated levels of sICAM-1 are independently associated with the development of accelerated atherosclerosis among otherwise healthy men even in the absence of acute coronary occlusion.
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