Abstract
Two studies were performed to examine the relationship between Prostacyclin (PGI2) and high density lipoprotein cholesterol (HDL-C). A longitudinal study examined the stable metabolite of PGI2, 6-keto PGF1 alpha, along with HDL-C, and total cholesterol (TC) before (Week 0), during (Week 4), and after (Week 9) an eight week aerobic conditioning program. 6-keto PGF1 alpha was measured by radioimmunoassay using 125I, and HDL-C and TC were spectrophotometrically analysed. Maximal oxygen uptake and resting heart rate data obtained at Week 0 confirmed that the training group (E) was not different from the sedentary group (C). Results obtained at Week 9 indicated that maximal oxygen uptake was higher (p less than 0.05) and resting heart rate lower (p less than 0.05) in the E group, while these variables remained unchanged in group C. Levels of 6-keto PGF1 alpha, HDL-C, and TC did not differ between groups E and C when Week 0 was compared with Week 9. However, within the E group, significantly lower concentrations of 6-keto PGF1 alpha (p less than 0.05) and HDL-C (p less than 0.05) were found at Week 4 compared with Week 0. A cross-sectional study involving 52 subjects examined the relationship between 6-keto PGF1 alpha and several car...Continue Reading
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