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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Antioxidant effects of zinc supplementation in tunisians with type 2 diabetes mellitus
Journal of the American College of Nutrition, Volume 22, No. 4, Year 2003
Notification
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Description
Objective: To determine the effects of zinc (Zn) supplementation on oxidative stress in persons with type 2 diabetes mellitus (type 2 DM). Design: Tunisian adult subjects with HbA1c >7.5% were supplemented for six months with 30 mg/day of Zn as Zn gluconate or placebo. The effects of supplementation on plasma zinc (Zn), copper (Cu), urinary Zn, plasma thiobarbituric acid reactive substances (TBARS), Cu-Zn superoxide dismutase (SOD) and glutathione peroxidase activities (GPX) in red blood cells, blood lipids and lipoproteins, HbA1c and fasting glucose were measured at the beginning of the study and after three and six months. Results: At the beginning of the study, more than 30% of the subjects exhibited plasma Zn values less than the normal minimum of 10.7 μmol/L, whereas levels of plasma Cu and antioxidant RBC Cu-Zn SOD and GPx enzyme activities were in the normal ranges. Oxidative stress, monitored by plasma TBARS, was increased in individuals with diabetes compared with healthy Tunisian subjects (3.32 ± 0.05 μmol/L vs. 2.08 ± 0.04 μmol/L) and an inverse correlation was found between Zn plasma levels and plasma TBARS. After three and six months of Zn supplementation, all of the subjects exhibited plasma Zn values greater than 10.7 μmol/L. There was a decrease of plasma TBARS in Zn supplemented group after six months (15%) with no significant changes in the placebo group. Supplementation did not alter significantly HbA1c nor glucose homeostasis. No adverse effects of Zn supplementation were observed on Cu status or HDL cholesterol. Conclusions: These data suggest the potential beneficial antioxidant effects of Zn supplementation in persons with type 2 DM. These results are particularly important in light of the deleterious consequences of oxidative stress in persons with diabetes. © 2003 American College of Nutrition.
Authors & Co-Authors
Roussel, Anne Marie
France, Saint Martin D'heres
Université Grenoble Alpes
Kerkeni, Abdelhamid
Tunisia, Monastir
Faculté de Médecine de Monastir
Zouari, Nouri
Tunisia, Sfax
Chu Habib Bourguiba
Mahjoub, Sylvia S.
Tunisia
Hopital de Monastir
Matheau, Jean Marc
France, Montrouge
Laboratoire Labcatal
Anderson, Richard A.
United States, Beltsville
Usda Ars Beltsville Human Nutrition Research Center
Statistics
Citations: 188
Authors: 6
Affiliations: 6
Identifiers
Doi:
10.1080/07315724.2003.10719310
ISSN:
07315724
e-ISSN:
15411087
Research Areas
Food Security
Noncommunicable Diseases