Antioxidative properties of Jaffa sweeties and grapefruit and their influence on lipid metabolism and plasma antioxidative potential in rats.
The effective substances (polyphenols, phenolic and ascorbic acids, flavonoids and dietary fibers) and antioxidative activities, using different radical-scavenging tests, were determined for Jaffa sweeties and grapefruit. The antioxidative activities comprised the contributions from polyphenols, phenolic acids, flavonoids and ascorbate components, and were well-correlated with polyphenols and flavonoids. The correlation coefficient between the polyphenols and antioxidative activity varied from 0.73 to 0.99. All applied methods showed that sweeties had higher antioxidative activity than grapefruit. Experiments on laboratory animals show that diets supplemented with sweeties, and to a lesser extent with grapefruit, increased the plasma antioxidative potential and improved the lipid metabolism, especially in the rats fed with added cholesterol. These findings provide additional characterization of the nutritional value of citrus fruits and their influence on the lipid metabolism in rats.
Gorinstein
Shela
S
Department of Medicinal Chemistry and Natural Products, School of Pharmacy, Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel. gorin@cc.huji.ac.il
Yamamoto
Kazutaka
K
Katrich
Elena
E
Leontowicz
Hanna
H
Lojek
Antonin
A
Leontowicz
Maria
M
Cíz
Milan
M
Goshev
Ivan
I
Shalev
Uri
U
Trakhtenberg
Simon
S
D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D002784:Cholesterol / Q000494:pharmacology; D002957:Citrus / Q000737:chemistry*; D032083:Citrus paradisi / Q000737:chemistry; D005419:Flavonoids / Q000032:analysis / Q000494:pharmacology; D007557:Israel; D050356:Lipid Metabolism; D008055:Lipids / Q000097:blood; D008297:Male; D009569:Nitric Oxide / Q000037:antagonists & inhibitors; D009747:Nutritional Physiological Phenomena; D010636:Phenols / Q000032:analysis / Q000494:pharmacology; D011108:Polymers / Q000032:analysis / Q000494:pharmacology; D051381:Rats; D017208:Rats, Wistar
D000975:Antioxidants; D005419:Flavonoids; D008055:Lipids; D010636:Phenols; D011108:Polymers; D009569:Nitric Oxide; D002784:Cholesterol