Effects of nicotinic acid on serum cholesterol concentrations of high density lipoprotein subfractions HDL2, and HDL3, in hyperlipoproteinaemia
- 1 August 1990
- journal article
- Published by Wiley in Journal of Internal Medicine
- Vol. 228 (2), 151-158
- https://doi.org/10.1111/j.1365-2796.1990.tb00209.x
Abstract
Nicotinic acid was given in a 4-g daily dose for 6 weeks to 41 weight-stable patients of mean age (+/- SD) 52 +/- 9 years, with type IIa, type IIb or type IV hyperlipoproteinaemia (HLP), in order to study its effects on serum cholesterol concentrations of high density lipoprotein (HDL) subfractions HDL2 and HDL3. The triglyceride and cholesterol levels of serum very low density (VLDL) and low density (LDL) lipoproteins decreased during treatment (P less than 0.001). Serum HDL and HDL2 cholesterol levels increased by 37% and 135%, respectively. These changes were positively correlated (r = 0.93; P less than 0.001). There was no significant change in mean serum HDL3 cholesterol concentration. A negative correlation existed between changes in HDL3 and HDL2 cholesterol levels (r = -0.54; P less than 0.001). Multiple stepwise linear regression analyses revealed that the initial HDL3 cholesterol predicted more than 30% of the increase in HDL2 cholesterol. Changes in the concentrations of HDL2 and HDL3 cholesterol after 6 weeks of drug treatment were not related to the type of HLP, neither were these effects of nicotinic acid correlated with changes in VLDL or LDL lipid levels. The concept has previously been proposed, on the basis of in vitro data, that HDL2 is formed from HDL3 particles in the blood. Our results suggest that, in man, this reaction is stimulated in vivo by prolonged nicotinic acid therapy.Keywords
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