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• W2007709868 abstract "Following our observations that non-esterified fatty acids (NEFAs) inhibit prostacyclin (PGI2) synthesis and accelerate PGI2 degradation, we have examined the possibility that NEFAs may also affect the activity of vascular ADPase, which converts the platelet pro-aggregatory adenosine diphosphate (ADP) to adenosine, an inhibitor of aggregation and a vasodilator. Incubation, in buffer solutions, of NEFAs with intact rat aortic rings significantly inhibited vascular ADPase activity. This inhibition was more marked at higher NEFA concentrations and with unsaturated fatty acids (linoleic, oleic) than with a saturated fatty acid (stearic). This NEFA-mediated inhibition of vascular ADPase activity could be prevented by the prior addition of fatty acid-free human albumin to the incubate. Similarly, the vascular rings recovered from NEFA-mediated inhibition by washing and further incubation in NEFA-free buffer. Therefore, elevated NEFA concentrations inhibit, reversibly, an enzyme system which is thought to protect the vascular endothelium. The NEFA-mediated inhibition of ADPase activity was also confirmed following incubation of rat aortic rings in human serum enriched with exogenous NEFA. These findings provide further evidence that NEFAs may contribute to the pathogenesis of vascular disease associated with diabetes mellitus and of other conditions where an elevation of serum NEFA concentrations occurs. Following our observations that non-esterified fatty acids (NEFAs) inhibit prostacyclin (PGI2) synthesis and accelerate PGI2 degradation, we have examined the possibility that NEFAs may also affect the activity of vascular ADPase, which converts the platelet pro-aggregatory adenosine diphosphate (ADP) to adenosine, an inhibitor of aggregation and a vasodilator. Incubation, in buffer solutions, of NEFAs with intact rat aortic rings significantly inhibited vascular ADPase activity. This inhibition was more marked at higher NEFA concentrations and with unsaturated fatty acids (linoleic, oleic) than with a saturated fatty acid (stearic). This NEFA-mediated inhibition of vascular ADPase activity could be prevented by the prior addition of fatty acid-free human albumin to the incubate. Similarly, the vascular rings recovered from NEFA-mediated inhibition by washing and further incubation in NEFA-free buffer. Therefore, elevated NEFA concentrations inhibit, reversibly, an enzyme system which is thought to protect the vascular endothelium. The NEFA-mediated inhibition of ADPase activity was also confirmed following incubation of rat aortic rings in human serum enriched with exogenous NEFA. These findings provide further evidence that NEFAs may contribute to the pathogenesis of vascular disease associated with diabetes mellitus and of other conditions where an elevation of serum NEFA concentrations occurs." @default.
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• W2007709868 title "The effect of non-esterified fatty acids on vascular ADP-degrading enzyme activity" @default.
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• W2007709868 doi "https://doi.org/10.1016/s0168-8227(87)80003-7" @default.
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