Replacement of dietary saturated FAs by PUFAs in diet and reverse cholesterol transport

Abstract

Dietary intervention is the first and usually successful approach in the treatment of high LDL cholesterol (LDL-C) concentration, but it is frequently accompanied by a decrease in HDL concentration. We studied 14 male volunteers on two different diets, high saturated fatty acid (SFA) and high PUFA, in a crossover design to test whether a decrease in HDL can affect reverse cholesterol transport from relabeled macrophages. A significant decrease of LDL-C (in mmol/l) after a PUFA diet compared with an SFA diet from 3.15 ± 0.65 to 2.80 ± 0.56 (P < 0.01) was accompanied by a significant decrease of HDL cholesterol (HDL-C) (in mmol/l) from 1.21 ± 0.30 to 1.10 ± 0.32 (P < 0.05). These changes did not affect cholesterol efflux (CHE) from macrophages (9.74 ± 1.46% vs. 9.53 ± 1.41%). There was no correlation between individual changes of HDL-C and changes of CHE. It is concluded that the decrease of HDL-C after successful dietary intervention of LDL-C is not accompanied by a decrease of CHE.

Keywords

• fatty acids
• cholesterol efflux
• macrophages