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- W2574270050 abstract "HIV-1-infected individuals have a two- to four-fold greater incidence of cardiovascular disease and atherothrombotic events compared with the general population. The mechanisms responsible for this heightened cardiovascular risk are not fully understood. We have previously reported that the capacity of the endothelium to release tissue-type plasminogen activator (t-PA), the primary activator of fibrinolysis and a key endogenous defense mechanism against intravascular fibrin deposition and thrombosis, is impaired in HIV-1-seropositive adults. Whether diminished fibrinolytic activity is coupled with a hypercoagulative state in this population is unknown. Elevations in specific coagulation markers such as tissue factor and Factor VII are associated with increased thrombotic risk. The experimental aim of this study was to determine the influence of HIV-1 infection and antiretroviral therapy (ART) on markers of coagulation. To address this aim we studied 33 men: 16 HIV-1-seronegative (age: 41±3 yr); 7 HIV-1-seropositive treatment-naïve (34±2 yr); and 10 HIV-1-seropositive receiving ART (42±3 yr; efavirenz-based regimen). All subjects were non-obese, normotensive and free of overt cardiometabolic disease. Circulating concentrations of tissue factor, Factor VII, Factor VIII and Factor X were determined by immunoassay. There were no significant differences in plasma concentrations of tissue factor (32+3 vs 40+3 pg/mL), Factor VII (103+9 vs 100+5 %), Factor VIII (111+13 vs 117+8 %) and Factor X (89+5 vs 91+2 %) between HIV-1-seropositive treatment-naïve and healthy men. Moreover, there was no influence of ART on these circulating markers. Plasma tissue factor (41+5 pg/mL), Factor VII (107+6 %), Factor VIII (103+7 %) and Factor X (90+3%) were similar in the HIV-1-seropositive receiving ART compared with HIV-1-seropositive treatment-naïve and seronegative groups. These data suggest that neither HIV-1 infection per se nor ART are associated with unfavorable changes in specific coagulation markers. Thus, changes in the coagulation system that have been linked to increased thrombotic burden are not apparent in HIV-1-seropositive adults." @default.
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- W2574270050 date "2013-05-01" @default.
- W2574270050 modified "2023-09-25" @default.
- W2574270050 title "Abstract 350: Influence of HIV-1 Infection and Antiretroviral Therapy on the Coagulation System" @default.
- W2574270050 doi "https://doi.org/10.1161/atvb.33.suppl_1.a350" @default.
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