| Dietary inorganic nitrate improves mitochondrial efficiency in humans. | |
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MedLine Citation:
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PMID: 21284982 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Nitrate, an inorganic anion abundant in vegetables, is converted in vivo to bioactive nitrogen oxides including NO. We recently demonstrated that dietary nitrate reduces oxygen cost during physical exercise, but the mechanism remains unknown. In a double-blind crossover trial we studied the effects of a dietary intervention with inorganic nitrate on basal mitochondrial function and whole-body oxygen consumption in healthy volunteers. Skeletal muscle mitochondria harvested after nitrate supplementation displayed an improvement in oxidative phosphorylation efficiency (P/O ratio) and a decrease in state 4 respiration with and without atractyloside and respiration without adenylates. The improved mitochondrial P/O ratio correlated to the reduction in oxygen cost during exercise. Mechanistically, nitrate reduced the expression of ATP/ADP translocase, a protein involved in proton conductance. We conclude that dietary nitrate has profound effects on basal mitochondrial function. These findings may have implications for exercise physiology- and lifestyle-related disorders that involve dysfunctional mitochondria. |
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Authors:
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Filip J Larsen; Tomas A Schiffer; Sara Borniquel; Kent Sahlin; Björn Ekblom; Jon O Lundberg; Eddie Weitzberg |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Cell metabolism Volume: 13 ISSN: 1932-7420 ISO Abbreviation: Cell Metab. Publication Date: 2011 Feb |
Date Detail:
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Created Date: 2011-02-02 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101233170 Medline TA: Cell Metab Country: United States |
Other Details:
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Languages: eng Pagination: 149-59 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Physiology and Pharmacology, Karolinska Institutet, 11486 Stockholm, Sweden; Swedish School of Sport and Health Sciences, Karolinska Institutet, 11486 Stockholm, Sweden. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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