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Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs

BACKGROUND: Cytochrome oxidase IV complex regulates energy production in mitochondria. Therefore, we determined the relation of COX genes with atherosclerosis in mice and pigs. METHODS AND RESULTS: First, we compared atherosclerosis in the aortic arch of age-matched (24 weeks) C57BL/6J control (n =...

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Autores principales: Holvoet, Paul, Vanhaverbeke, Maarten, Geeraert, Benjamine, De Keyzer, Dieuwke, Hulsmans, Maarten, Janssens, Stefan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5266248/
https://www.ncbi.nlm.nih.gov/pubmed/28122051
http://dx.doi.org/10.1371/journal.pone.0170307
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author Holvoet, Paul
Vanhaverbeke, Maarten
Geeraert, Benjamine
De Keyzer, Dieuwke
Hulsmans, Maarten
Janssens, Stefan
author_facet Holvoet, Paul
Vanhaverbeke, Maarten
Geeraert, Benjamine
De Keyzer, Dieuwke
Hulsmans, Maarten
Janssens, Stefan
author_sort Holvoet, Paul
collection PubMed
description BACKGROUND: Cytochrome oxidase IV complex regulates energy production in mitochondria. Therefore, we determined the relation of COX genes with atherosclerosis in mice and pigs. METHODS AND RESULTS: First, we compared atherosclerosis in the aortic arch of age-matched (24 weeks) C57BL/6J control (n = 10), LDL-receptor deficient (n = 8), leptin-deficient ob/ob (n = 10), and double knock-out (lacking LDL-receptor and leptin) mice (n = 12). Low aortic mitochondria-encoded cytochrome oxidase 1 in obese diabetic double knock-out mice was associated with a larger plaque area and higher propensity of M1 macrophages and oxidized LDL. Caloric restriction increased mitochondria-encoded cytochrome oxidase 1 and reduced plaque area and oxidized LDL. This was associated with a reduction of titer of anti-oxidized LDL antibodies, a proxy of systemic oxidative stress. Low of mitochondria-encoded cytochrome oxidase 1 was related to low expression of peroxisome proliferative activated receptors α, δ, and γ and of peroxisome proliferative activated receptor, gamma, co-activator 1 alpha reflecting mitochondrial dysfunction. Caloric restriction increased them. To investigate if there was a diabetic/obesity requirement for mitochondria-encoded cytochrome oxidase 1 to be down-regulated, we then studied atherosclerosis in LAD of hypercholesterolemic pigs (n = 37). Pigs at the end of the study were divided in three groups based on increasing LAD plaque complexity according to Stary (Stary I: n = 12; Stary II: n = 13; Stary III: n = 12). Low mitochondria-encoded cytochrome oxidase 1 in isolated plaque macrophages was associated with more complex coronary plaques and oxidized LDL. Nucleus-encoded cytochrome oxidase 4I1 and cytochrome oxidase 10 did not correlate with plaque complexity and oxidative stress. In mice and pigs, MT-COI was inversely related to insulin resistance. CONCLUSIONS: Low MT-COI is related to mitochondrial dysfunction, oxidative stress and atherosclerosis and plaque complexity.
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spelling pubmed-52662482017-02-17 Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs Holvoet, Paul Vanhaverbeke, Maarten Geeraert, Benjamine De Keyzer, Dieuwke Hulsmans, Maarten Janssens, Stefan PLoS One Research Article BACKGROUND: Cytochrome oxidase IV complex regulates energy production in mitochondria. Therefore, we determined the relation of COX genes with atherosclerosis in mice and pigs. METHODS AND RESULTS: First, we compared atherosclerosis in the aortic arch of age-matched (24 weeks) C57BL/6J control (n = 10), LDL-receptor deficient (n = 8), leptin-deficient ob/ob (n = 10), and double knock-out (lacking LDL-receptor and leptin) mice (n = 12). Low aortic mitochondria-encoded cytochrome oxidase 1 in obese diabetic double knock-out mice was associated with a larger plaque area and higher propensity of M1 macrophages and oxidized LDL. Caloric restriction increased mitochondria-encoded cytochrome oxidase 1 and reduced plaque area and oxidized LDL. This was associated with a reduction of titer of anti-oxidized LDL antibodies, a proxy of systemic oxidative stress. Low of mitochondria-encoded cytochrome oxidase 1 was related to low expression of peroxisome proliferative activated receptors α, δ, and γ and of peroxisome proliferative activated receptor, gamma, co-activator 1 alpha reflecting mitochondrial dysfunction. Caloric restriction increased them. To investigate if there was a diabetic/obesity requirement for mitochondria-encoded cytochrome oxidase 1 to be down-regulated, we then studied atherosclerosis in LAD of hypercholesterolemic pigs (n = 37). Pigs at the end of the study were divided in three groups based on increasing LAD plaque complexity according to Stary (Stary I: n = 12; Stary II: n = 13; Stary III: n = 12). Low mitochondria-encoded cytochrome oxidase 1 in isolated plaque macrophages was associated with more complex coronary plaques and oxidized LDL. Nucleus-encoded cytochrome oxidase 4I1 and cytochrome oxidase 10 did not correlate with plaque complexity and oxidative stress. In mice and pigs, MT-COI was inversely related to insulin resistance. CONCLUSIONS: Low MT-COI is related to mitochondrial dysfunction, oxidative stress and atherosclerosis and plaque complexity. Public Library of Science 2017-01-25 /pmc/articles/PMC5266248/ /pubmed/28122051 http://dx.doi.org/10.1371/journal.pone.0170307 Text en © 2017 Holvoet et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Holvoet, Paul
Vanhaverbeke, Maarten
Geeraert, Benjamine
De Keyzer, Dieuwke
Hulsmans, Maarten
Janssens, Stefan
Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title_full Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title_fullStr Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title_full_unstemmed Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title_short Low Cytochrome Oxidase 1 Links Mitochondrial Dysfunction to Atherosclerosis in Mice and Pigs
title_sort low cytochrome oxidase 1 links mitochondrial dysfunction to atherosclerosis in mice and pigs
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5266248/
https://www.ncbi.nlm.nih.gov/pubmed/28122051
http://dx.doi.org/10.1371/journal.pone.0170307
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