Red Star Ruby (Sunrise) and blond qualities of Jaffa grapefruits and their influence on plasma lipid levels and plasma antioxidant activity in rats fed with cholesterol-containing and cholesterol-free diets

被引:32
作者
Gorinstein, S
Leontowicz, H
Leontowicz, M
Drzewiecki, J
Jastrzebski, Z
Tapia, MS
Katrich, E
Trakhtenberg, S
机构
[1] Hebrew Univ Jerusalem, Hadassah Med Sch, Sch Pharm, Dept Med Chem & Nat Prod, IL-91120 Jerusalem, Israel
[2] Agr Univ Warsaw, Fac Med Vet, Dept Physiol Sci, PL-02787 Warsaw, Poland
[3] Plant Breeding & Acclimatizat Inst IHAR, PL-05870 Blonie, Poland
[4] Inst Publ Hlth, Dept Pharmacol, PL-00725 Warsaw, Poland
[5] Cent Univ Venezuela, Fac Ciencias, Inst Ciencia & Tecnol Alimentos, Caracas 1041, Venezuela
[6] Kaplan Med Ctr, IL-76100 Rehovot, Israel
关键词
red and blond grapefruits; bioactive compounds; rats; plasma lipid levels and antioxidant activity;
D O I
10.1016/j.lfs.2004.12.049
中图分类号
R-3 [医学研究方法]; R3 [基础医学];
学科分类号
1001 ;
摘要
Bioactive compounds of peels and peeled red Star Ruby (Sunrise) and blond qualities of Jaffa grapefruits were analyzed and their antioxidant potential was assessed. The dietary fibers were determined according to Prosky et al., the total polyphenol content by Folin-Ciocalteu method and measured at 765 nm, minerals and trace elements by atomic absorption spectrometer, phenolic and ascorbic acids by HPLC and the antioxidant potential by two different antioxidant assays (DPPH and beta-carotene linoleate model system). It was found that the contents of most studied bioactive compounds in both qualities are comparable. Only the contents of total polyphenols and flavonoids were higher in red grapefruits, but not significant. The antioxidant potentials of red peeled grapefruits and their peels were significantly higher than of blond peeled grapefruits and their peels (P < 0.05 in both cases). Diets supplemented with peeled red and blond qualities of Jaffa grapefruits and their peels have increased the plasma antioxidant capacity and improved plasma lipid levels, especially in rats fed with cholesterol added diet. In conclusion, both qualities of Jaffa grapefruits contain high quantities of bioactive compounds, but the antioxidant potential of red grapefruits is significantly higher. Diets supplemented with both qualities of Jaffa grapefruits improve the plasma lipid levels and increase the plasma antioxidant activity, especially in rats fed with cholesterol added diets. Jaffa grapefruits, especially their red Star Ruby quality, could be a valuable supplementation for diseases-preventing diets. (c) 2005 Elsevier Inc. All rights reserved.
引用
收藏
页码:2384 / 2397
页数:14
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