Vitamin E dietary supplementation significantly affects multiple risk factors for cardiovascular disease in baboons  

Oleh:

Rainwater, David L. ; Mahaney, Michael C. ; VandeBerg, John L. ; Wang, Xing Li

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 86 no. 03 (Sep. 2007), page 597.
Topik: Vitamin E; HDL; high-density lipoprotein; antioxidants; paraoxonase; apo A-I; apolipoprotein A-I; baboons

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2007.03 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

Background: Oxidative stress is a widely accepted risk factor for cardiovascular disease (CVD), but the CVD benefit of dietary antioxidants, such as vitamin E, is controversial. Objective: Therefore, we have investigated, in the baboon model, the effects of dietary vitamin E supplementation on risk factors for CVD. Design: Pedigreed baboons (n = 251) were fed 2 atherogenic diets, high in fat and cholesterol, that differed in vitamin E concentrations. After 7 wk on each diet, blood samples were taken, and a panel of CVD risk factor traits (ie, indicators of lipoprotein metabolism and oxidative stress) were measured. Results: Vitamin E supplementation caused significantly higher total antioxidant status (TAS) and lower oxidized LDL as expected. In addition, vitamin E caused 2 paradoxical effects on HDL metabolism: higher apolipoprotein A-I (apo A-I) concentrations and lower HDL sizes. We calculated a difference () variable for each trait as the value on the high-vitamin E diet minus that on the low-vitamin E diet and determined that several HDL concentration variables were significantly correlated with TAS, but only one, apo A-I, was independently correlated. Genetic analyses showed that 2 variables, paraoxonase and HDL2, were significantly heritable, but that neither TAS nor apo A-I were heritable. Conclusions: Thus, our data show that dietary vitamin E improves TAS and LDL quality. They also show 2 apparently paradoxical effects on HDL metabolism: lower HDL2, which is mediated by genes, and higher apo A-I, which is not. These effects have contrasting associations with CVD risk and may help account for the mixed results from clinical trials of dietary vitamin E.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali