OMENTIN-1 AND NONFATAL ISCHEMIC HEART DISEASE IN POSTMENOPAUSAL WOMEN: A POPULATION-BASED STUDY.

Objective: There is growing evidence that supports the existence of a link between lower levels of circulating omentin-1 and the pathogenesis of coronary atherosclerosis. However, no population-based study has been performed to elucidate the cardioprotective role of this beneficial adipocytokine.

Methods: A total of 378 healthy, postmenopausal women were randomly selected from 13 clusters in the port city of Bushehr, Iran. The prevalence of nonfatal ischemic heart disease (IHD) was assessed using the Minnesota code with a 12-lead resting electrocardiogram (EKG). EKG with evidence of IHD (IHD-EKG) was defined as myocardial infarction (codes 1.1 and 1.2) and ischemia (codes 1.3, 4.1 to 4.4, 5.1 to 5.3, and 7.1) occurring together. Serum omentin-1 and adiponectin levels were measured using enzyme-linked immunosorbent assay methods.

Results: The prevalence of IHD-EKG among the studied population was 41.8% (159 women). Serum levels of omentin-1 were significantly lower in women with ischemic EKG than in normal subjects (geometric mean ×/multiplicative standard deviation, 10.31 ×/2.35 ng/mL versus 12.44 ×/2.12 ng/mL, respectively; P = .038). Multiple logistic regression analysis indicated that higher serum levels of omentin-1 were significantly associated with a lower prevalence of ischemic EKG after adjusting for potential confounders, including classical cardiovascular risk factors and circulating adiponectin levels (odds ratio, 0.48; confidence interval, 0.24 to 0.95; P = .038).

Conclusion: A higher level of circulating omentin-1 is independently associated with a lower prevalence of nonfatal IHD in postmenopausal women. The cardioprotective role of this novel adipocytokine needs to be further elucidated in large-scale longitudinal studies.

Abbreviations: BMI = body mass index EKG = electrocardiogram ELISA = enzyme-linked immunosorbent assay HDL = high-density lipoprotein IHD = ischemic heart disease LDL = low-density lipoprotein.