Effect of zinc supplementation on the antioxidant, copper, and iron status of physically active adolescents
Identifieur interne : 000470 ( Main/Exploration ); précédent : 000469; suivant : 000471Effect of zinc supplementation on the antioxidant, copper, and iron status of physically active adolescents
Auteurs : Karla De Jesus Fernandes De Oliveira [Brésil] ; Carmen Marino Donangelo [Brésil] ; Astrogildo Vianna De Oliveira Jr. [Brésil] ; Carmen Lucia Porto Da Silveira [Brésil] ; Josely Correa Koury [Brésil]Source :
- Cell Biochemistry and Function [ 0263-6484 ] ; 2009-04.
English descriptors
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Abstract
Puberty associated with intense physical activity results in oxidation stress. Zinc supplementation may benefit antioxidant capacity although it may also affect iron and copper status. This study evaluated the effect of zinc supplementation on antioxidant, zinc and copper status of physically active male football players (13 years ± 0.4 years), divided in two groups and studied during 12 weeks: Zn‐supplemented (Zn‐SUP, 22 mg Zn d−1 as zinc gluconate, n = 21) and placebo (PLA, n = 26). At baseline, there was no significant difference in biochemical indices between the two groups. After treatment, plasma zinc and erythrocyte iron increased in both groups (p < 0.001); urinary zinc increased (p < 0.001) only in Zn‐SUP, and erythrocyte zinc decreased (p = 0.002) only in PLA. Plasma iron and copper decreased (p = 0.01 and p = 0.015, respectively) only in Zn‐SUP. Plasma ferric‐reducing ability and plasma conjugated dienes increased, and erythrocyte osmotic fragility decrease in both groups, although the latter two were significantly lower in Zn‐SUP compared to PLA (p < 0.01). In conclusion, our study indicates that the use of 22 mg d−1 of supplemental zinc during 12 week in adolescent athletes did not affect growth, improved markers of antioxidant status but reduced plasma iron and copper. Therefore, it appears that the use of zinc supplementation by healthy adolescent athletes benefits their antioxidant capacity but impairs copper and iron nutritional status. Copyright © 2009 John Wiley & Sons, Ltd.
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DOI: 10.1002/cbf.1550
Affiliations:
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Funct.</title><idno type="ISSN">0263-6484</idno><idno type="eISSN">1099-0844</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2009-04">2009-04</date><biblScope unit="volume">27</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="162">162</biblScope><biblScope unit="page" to="166">166</biblScope></imprint><idno type="ISSN">0263-6484</idno></series><idno type="istex">2A79EDE892175B16FF47510146166EA4D6955F22</idno><idno type="DOI">10.1002/cbf.1550</idno><idno type="ArticleID">CBF1550</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0263-6484</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>adolescents</term><term>antioxidant status</term><term>athletes</term><term>supplementation</term><term>zinc</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Puberty associated with intense physical activity results in oxidation stress. Zinc supplementation may benefit antioxidant capacity although it may also affect iron and copper status. This study evaluated the effect of zinc supplementation on antioxidant, zinc and copper status of physically active male football players (13 years ± 0.4 years), divided in two groups and studied during 12 weeks: Zn‐supplemented (Zn‐SUP, 22 mg Zn d−1 as zinc gluconate, n = 21) and placebo (PLA, n = 26). At baseline, there was no significant difference in biochemical indices between the two groups. After treatment, plasma zinc and erythrocyte iron increased in both groups (p < 0.001); urinary zinc increased (p < 0.001) only in Zn‐SUP, and erythrocyte zinc decreased (p = 0.002) only in PLA. Plasma iron and copper decreased (p = 0.01 and p = 0.015, respectively) only in Zn‐SUP. Plasma ferric‐reducing ability and plasma conjugated dienes increased, and erythrocyte osmotic fragility decrease in both groups, although the latter two were significantly lower in Zn‐SUP compared to PLA (p < 0.01). In conclusion, our study indicates that the use of 22 mg d−1 of supplemental zinc during 12 week in adolescent athletes did not affect growth, improved markers of antioxidant status but reduced plasma iron and copper. Therefore, it appears that the use of zinc supplementation by healthy adolescent athletes benefits their antioxidant capacity but impairs copper and iron nutritional status. Copyright © 2009 John Wiley & Sons, Ltd.</div></front></TEI><affiliations><list><country><li>Brésil</li></country></list><tree><country name="Brésil"><noRegion><name sortKey="De Oliveira, Karla De Jesus Fernandes" sort="De Oliveira, Karla De Jesus Fernandes" uniqKey="De Oliveira K" first="Karla De Jesus Fernandes" last="De Oliveira">Karla De Jesus Fernandes De Oliveira</name></noRegion><name sortKey="Da Silveira, Carmen Lucia Porto" sort="Da Silveira, Carmen Lucia Porto" uniqKey="Da Silveira C" first="Carmen Lucia Porto" last="Da Silveira">Carmen Lucia Porto Da Silveira</name><name sortKey="De Oliveira Jr, Astrogildo Vianna" sort="De Oliveira Jr, Astrogildo Vianna" uniqKey="De Oliveira Jr A" first="Astrogildo Vianna" last="De Oliveira Jr.">Astrogildo Vianna De Oliveira Jr.</name><name sortKey="Donangelo, Carmen Marino" sort="Donangelo, Carmen Marino" uniqKey="Donangelo C" first="Carmen Marino" last="Donangelo">Carmen Marino Donangelo</name><name sortKey="Koury, Josely Correa" sort="Koury, Josely Correa" uniqKey="Koury J" first="Josely Correa" last="Koury">Josely Correa Koury</name><name sortKey="Koury, Josely Correa" sort="Koury, Josely Correa" uniqKey="Koury J" first="Josely Correa" last="Koury">Josely Correa Koury</name><name sortKey="Koury, Josely Correa" sort="Koury, Josely Correa" uniqKey="Koury J" first="Josely Correa" last="Koury">Josely Correa Koury</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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