Effects of dietary ascorbic acid supplementation on lipid peroxidation and the lipid content in the liver and serum of magnesium-deficient rats.
We investigated the effects of ascorbic acid (AsA) supplementation on lipid peroxidation and the lipid content in the liver and serum of magnesium (Mg)-deficient rats. Eighteen 3-week-old male Sprague-Dawley strain rats were divided into 3 groups and maintained on a control diet (C group), a low-Mg diet (D group), or a low-Mg diet supplemented with AsA (DA group) for 42 d. At the end of this period, the final body weight, weight gain, and serum Mg concentrations were significantly decreased in the Mg-deficient rats. Further, dietary AsA supplementation had no effect on the growth, serum Mg concentration, Mg absorption, and Mg retention. The serum concentration of AsA was significantly lower in the D group than in the C group but was unaltered in the DA group. The levels of phosphatidylcholine hydroperoxide (PCOOH) in the serum and of triglycerides (TGs) and total cholesterol (TC) in the serum and liver were significantly higher in the D group than in the C group. The serum PCOOH, liver TG, and liver TC levels were decreased in the DA group. These results indicate that Mg deficiency increases the AsA requirement of the body and that AsA supplementation normalizes the serum levels of PCOOH and the liver lipid content in Mg-deficient rats, without altering the Mg status.
Akiyama
Satoko
S
Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo, Japan.
Uehara
Mariko
M
Katsumata
Shin-ichi
S
Ihara
Hiroshi
H
Hashizume
Naotaka
N
Suzuki
Kazuharu
K
D000818:Animals; D001205:Ascorbic Acid / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D001835:Body Weight; D019587:Dietary Supplements; D015227:Lipid Peroxidation / Q000187:drug effects*; D008055:Lipids / Q000032:analysis / Q000097:blood; D008099:Liver / Q000187:drug effects* / Q000378:metabolism; D008275:Magnesium Deficiency / Q000188:drug therapy; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012015:Reference Standards
D008055:Lipids; D001205:Ascorbic Acid