Mandarin juice improves the antioxidant status of hypercholesterolemic children.
BACKGROUND
Oxidative stress has been linked to such degenerative diseases as atherosclerosis, and it has been suggested that increased dietary intake of antioxidants may reduce its progression.


OBJECTIVE
To determine the effect of mandarin juice consumption on biomarkers related to oxidative stress in hypercholesterolemic children.


METHODS
The diet of 48 children with plasma cholesterol >200 mg/dL and low-density lipoprotein cholesterol >130 mg/dL was supplemented for 28 days with 500 mL/day of pure (100%) mandarin juice (Citrus clementina Hort. ex Tan.). The composition of the mandarin juice was analyzed, and its antioxidant antiradical activity was evaluated in vitro. Malondialdehyde, carbonyl groups, vitamins E and C, erythrocyte-reduced glutathione, and plasma lipids were measured at the onset and at the end of the supplementation period. The paired Student t test was used to compare values before and after supplementation.


RESULTS
Mandarin juice exerted a strong antioxidant effect mainly due to its high hydroxyl activity and, to a lesser extent, to its superoxide scavenger activity. At the end of the study, levels of the plasma biomarkers of oxidative stress were significantly decreased (malondialdehyde -7.4%, carbonyl groups -29.1%, P < 0.01), whereas the plasma antioxidants vitamin E and C (13.5%, P < 0.001 and 68.2%, P < 0.00001, respectively) and intraerythrocyte glutathione level (36.7%, P < 0.00001) were significantly increased. Plasma lipids and antibodies to oxidized low-density lipoproteins remained unchanged.


CONCLUSIONS
Regular ingestion of mandarin juice significantly reduces plasma biomarkers of lipid and protein oxidation and enhances the antioxidant status of consumers.
Codoñer-Franch
Pilar
P
Department of Pediatrics, Obstetrics, and Gynecology, University of Valencia, Valencia, Spain. pilar.codoner@uv.es
López-Jaén
Ana B
AB
Muñiz
Pilar
P
Sentandreu
Enrique
E
Bellés
Victoria Valls
VV
D000975:Antioxidants / Q000378:metabolism* / Q000494:pharmacology; D001205:Ascorbic Acid / Q000097:blood; D001628:Beverages; D015415:Biomarkers / Q000097:blood; D002648:Child; D002784:Cholesterol / Q000097:blood; D002957:Citrus / Q000737:chemistry*; D019587:Dietary Supplements; D005260:Female; D016166:Free Radical Scavengers; D006801:Humans; D006937:Hypercholesterolemia / Q000097:blood / Q000378:metabolism*; D015227:Lipid Peroxidation / Q000187:drug effects; D008055:Lipids / Q000097:blood; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D009752:Nutritional Status; D010084:Oxidation-Reduction; D018384:Oxidative Stress / Q000187:drug effects*; D014810:Vitamin E / Q000097:blood
D000975:Antioxidants; D015415:Biomarkers; D016166:Free Radical Scavengers; D008055:Lipids; D014810:Vitamin E; D008315:Malondialdehyde; D002784:Cholesterol; D001205:Ascorbic Acid