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  • Title: Inverse relationship between plasminogen activator inhibitor-I activity and adiponectin in overweight and obese women. Interrelationship with visceral adipose tissue, insulin resistance, HDL-chol and inflammation.
    Author: Mertens I, Ballaux D, Funahashi T, Matsuzawa Y, Van der Planken M, Verrijken A, Ruige JB, Van Gaal LF.
    Journal: Thromb Haemost; 2005 Dec; 94(6):1190-5. PubMed ID: 16411393.
    Abstract:
    Adipose tissue is an active endocrine organ secreting different adipokines such as plasminogen activator inhibitor-1 (PAI-1) and adiponectin, among many others. In this study, we investigated the association between PAI-1 activity and serum adiponectin levels in a group of 444 overweight and obese women and assessed the interrelationship with visceral adipose tissue (VAT; CT-scan L4-L5), insulin resistance (HOMA-IR), HDL cholesterol (HDL-chol) and inflammation (hs-CRP). PAI-1 was inversely related to adiponectin (r = -0.25, p < 0.001; adjusted for age and BMI). After adjustment for age, VAT, HOMA-IR and hs-CRP, the relationship remained significant (r = -0.15; p = 0.001), but disappeared after additional adjustment for HDL-chol (r = -0.09; p = 0.067). Subjects were divided in two groups according to the median levels of adiponectin or PAI-1 levels. PAI-1 activity (19.1 +/- 11.4 vs. 15.8 +/- 8.6 AU/ml; p = 0.003) and adiponectin levels (9.8 +/- 4.6 vs. 8.4 +/- 4.0 microg/ml; p < 0.001) were significantly higher in the low adiponectin/PAI-1 groups. The difference in PAI-1 remained significant after adjustment for age and BMI (p = 0.001), became borderline significant after adjustment for age and VAT (p = 0.052), and disappeared after adjustment for age and HOMA-IR (p = 0.116) or age and HDL-chol (p = 0.443). The difference in adiponectin levels remained significant after adjustment for age, VAT, HOMA-IR and hs-CRP (p = 0.006), but disappeared after additional adjustment for HDL-chol (p = 0.089). Further analyses suggest a contribution of HOMA-IR and/or HDL-chol in the relationship between PAI-1 and adiponectin. HDL-chol was found to be the only factor independently determining both factors. In conclusion, in overweight and obese women, PAI-1 activity was inversely related to serum adiponectin, independent of visceral adipose tissue.
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