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- W2405968547 abstract "Current abacavir exposure has been reported to be associated with cardiovascular disease. Changes in platelet reactivity could plausibly explain the clinically observed pattern of association.To determine if platelet reactivity changed following abacavir exposure and whether this effect was reversible on cessation of the drug.In an open-label, interventional study abacavir, 600 mg daily, was added to a suppressive antiretroviral regimen in 20 adult HIV-positive men. Platelet function, estimated by the phosphorylated vasodilator-stimulated phosphoprotein (P-VASP) assay and through measurement of the expression and shedding of platelet-specific receptors, was assessed at baseline, following 15 days of abacavir and at completion of a 28-day washout period.The VASP-index decreased significantly from 79.1% [interquartile range (IQR) 47.8-87.6] to 32.6% (IQR -11.5-51.0) following 15 days of abacavir administration (P = 0.010), and returned to baseline levels following the washout period (day 43 =76.3%; IQR 40.7-92.3). There was no change in resting (prostaglandin E1 alone) P-VASP but a slight increase in P-VASP within stimulated platelets (prostaglandin E1 and adenosine diphosphate). Integrin β3 levels decreased significantly [208.5 ng/ml (IQR 177.0-231.1) to 177.5 ng/ml (IQR 151.7-205) P < 0.001] and there was a nonsignificant trend towards decreased soluble glycoprotein VI levels [baseline; 72.5 ng/ml (95% CI 58.3-81.5) vs. day 15; 45.0 ng/ml (95% CI 33.0-98.2) P = 0.79].Abacavir led to reversible changes in platelet function and structure. The clinical implications of these changes are uncertain; they may represent negative feedback mechanisms in response to an abacavir-associated prothrombotic state." @default.
- W2405968547 created "2016-06-24" @default.
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- W2405968547 date "2015-11-01" @default.
- W2405968547 modified "2023-09-27" @default.
- W2405968547 title "Effects of abacavir administration on structural and functional markers of platelet activation" @default.
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- W2405968547 doi "https://doi.org/10.1097/qad.0000000000000848" @default.
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