Obesity is characterized by alterations in haemostatic processes that lead to a prothrombotic state. D-dimer (D-Di) is the last product of the fibrinolysis and may reflect the haemostatic balance. As the plasminogen activator inhibitor (PAI)-1 is the main inhibitor of fibrinolysis and it is elevated in obese, we hypothesize that negative correlation exists between PAI-1 and D-Di. In addition, we evaluated if plasma levels of PAI-1 and D-Di may be correlated with clinical parameters of adiposity [waist circumference and waist-to-hip ratio (WHR)]. We measured plasma PAI-1 and D-Di concentrations using ELISA in 60 women: 21 lean women without comorbidities and 39 obese women. We found higher levels of D-Di and PAI-1 in obese groups compared to control group (P < 0.05). No differences were observed between obese and obese untreated hypertensives. PAI-1 levels, but not of D-Di, are positively correlated with BMI (control, r = 0.44) and WHR (all obese, r = 0.40). Negative correlation was found between PAI-1 and D-Di in control (r = -0.56), no association was observed in obese, signalizing to a particular attention regarding the clinical use of D-Di. Our results indicate the magnitude of central obesity as a risk factor for development of disorders related to prothrombotic states.
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