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Comparative Study
. 2015 Aug 14;4(8):e001853.
doi: 10.1161/JAHA.115.001853.

Sex-Specific Effects of Adiponectin on Carotid Intima-Media Thickness and Incident Cardiovascular Disease

Collaborators, Affiliations
Comparative Study

Sex-Specific Effects of Adiponectin on Carotid Intima-Media Thickness and Incident Cardiovascular Disease

Jonas Persson et al. J Am Heart Assoc. .

Abstract

Background: Plasma adiponectin levels have previously been inversely associated with carotid intima-media thickness (IMT), a marker of subclinical atherosclerosis. In this study, we used a sex-stratified Mendelian randomization approach to investigate whether adiponectin has a causal protective influence on IMT.

Methods and results: Baseline plasma adiponectin concentration was tested for association with baseline IMT, IMT progression over 30 months, and occurrence of cardiovascular events within 3 years in 3430 participants (women, n=1777; men, n=1653) with high cardiovascular risk but no prevalent disease. Plasma adiponectin levels were inversely associated with baseline mean bifurcation IMT after adjustment for established risk factors (β=-0.018, P<0.001) in men but not in women (β=-0.006, P=0.185; P for interaction=0.061). Adiponectin levels were inversely associated with progression of mean common carotid IMT in men (β=-0.0022, P=0.047), whereas no association was seen in women (0.0007, P=0.475; P for interaction=0.018). Moreover, we observed that adiponectin levels were inversely associated with coronary events in women (hazard ratio 0.57, 95% CI 0.37 to 0.87) but not in men (hazard ratio 0.82, 95% CI 0.54 to 1.25). A gene score of adiponectin-raising alleles in 6 loci, reported recently in a large multi-ethnic meta-analysis, was inversely associated with baseline mean bifurcation IMT in men (β=-0.0008, P=0.004) but not in women (β=-0.0003, P=0.522; P for interaction=0.007).

Conclusions: This report provides some evidence for adiponectin protecting against atherosclerosis, with effects being confined to men; however, compared with established cardiovascular risk factors, the effect of plasma adiponectin was modest. Further investigation involving mechanistic studies is warranted.

Keywords: Mendelian randomization; adiponectin; atherosclerosis; carotid intima‐media thickness; genetics.

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Figures

Figure 1
Figure 1
Lower plasma adiponectin concentrations were observed in northern recruitment centers.
Figure 2
Figure 2
The allelic score in relation to log Bif-IMTmean (blue bars) and plasma adiponectin (green line) in men. Bif-IMT indicates bifurcation intima-media thickness.
Figure 3
Figure 3
Kaplan–Meier plot of freedom from coronary events in men classified according to the allelic score.

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