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Fouret G, Tolika E, Lecomte J, Bonafos B, Aoun M, Murphy MP, Ferreri C, Chatgilialoglu C, Dubreucq E, Coudray C, Feillet-Coudray C. The mitochondrial-targeted antioxidant, MitoQ, increases liver mitochondrial cardiolipin content in obesogenic diet-fed rats. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:1025-35. [PMID: 26028302 DOI: 10.1016/j.bbabio.2015.05.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/15/2015] [Accepted: 05/22/2015] [Indexed: 12/30/2022]
Abstract
Cardiolipin (CL), a unique mitochondrial phospholipid, plays a key role in several processes of mitochondrial bioenergetics as well as in mitochondrial membrane stability and dynamics. The present study was designed to determine the effect of MitoQ, a mitochondrial-targeted antioxidant, on the content of liver mitochondrial membrane phospholipids, in particular CL, and its fatty acid composition in obesogenic diet-fed rats. To do this, twenty-four 6week old male Sprague Dawley rats were randomized into three groups of 8 animals and fed for 8weeks with either a control diet, a high fat diet (HF), or a HF diet with MitoQ (HF+MitoQ). Phospholipid classes and fatty acid composition were assayed by chromatographic methods in liver and liver mitochondria. Mitochondrial bioenergetic function was also evaluated. While MitoQ had no or slight effects on total liver fatty acid composition and phospholipid classes and their fatty acid composition, it had major effects on liver mitochondrial phospholipids and mitochondrial function. Indeed, MitoQ both increased CL synthase gene expression and CL content of liver mitochondria and increased 18:2n-6 (linoleic acid) content of mitochondrial phospholipids by comparison to the HF diet. Moreover, mitochondrial CL content was positively correlated to mitochondrial membrane fluidity, membrane potential and respiration, as well as to ATP synthase activity, while it was negatively correlated to mitochondrial ROS production. These findings suggest that MitoQ may decrease pathogenic alterations to CL content and profiles, thereby preserving mitochondrial function and attenuating the development of some of the features of metabolic syndrome in obesogenic diet-fed rats.
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Affiliation(s)
- Gilles Fouret
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université Montpellier, F-34060 Montpellier, France
| | | | | | - Béatrice Bonafos
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université Montpellier, F-34060 Montpellier, France
| | | | - Michael P Murphy
- MRC Mitochondrial Biology Unit, MRC Building, Hills Road, Cambridge CB2 0XY, UK
| | | | - Chryssostomos Chatgilialoglu
- Institute of Nanoscience & Nanotechnology, National Center of Scientific Research "Demokritos", Patriarchou Gregoriou Street, 15310, Agia Paraskevi, Athens, Greece
| | - Eric Dubreucq
- Montpellier SupAgro, UMR IATE, F-34060 Montpellier, France
| | - Charles Coudray
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université Montpellier, F-34060 Montpellier, France
| | - Christine Feillet-Coudray
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université Montpellier, F-34060 Montpellier, France.
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Modifiers of the oligomycin sensitivity of the mitochondrial F1F0-ATPase. Mitochondrion 2013; 13:312-9. [DOI: 10.1016/j.mito.2013.04.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 04/08/2013] [Accepted: 04/09/2013] [Indexed: 02/02/2023]
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Nesci S, Ventrella V, Trombetti F, Pirini M, Pagliarani A. Multi-site TBT binding skews the inhibition of oligomycin on the mitochondrial Mg–ATPase in Mytilus galloprovincialis. Biochimie 2011; 93:1157-64. [DOI: 10.1016/j.biochi.2011.04.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Accepted: 04/15/2011] [Indexed: 11/26/2022]
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Landi L, Pasquali P, Cabrini L, Sechi AM, Lenaz G. On the mechanism of inhibition of NADH oxidase by ubiquinone-3. J Bioenerg Biomembr 1984; 16:153-66. [PMID: 6536673 DOI: 10.1007/bf00743046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The combined effects of rotenone and ubiquinone-3 on the kinetics of NADH dehydrogenase and NADH oxidase have been investigated. The two inhibitors do not show additivity; on the other hand, ubiquinone-3, when preincubated with the enzyme, partially removes rotenone sensitivity. The inhibition of NADH oxidase by ubiquinone-3 is the result of at least two combined effects: the competition of the less active ubiquinone-3 with endogenous ubiquinone-10 in the acceptor site of the dehydrogenase, and a nonspecific action on the structure of complex I. The latter effect is perhaps mediated by a physical change of the phospholipid bilayer similar to that observed with agents such as butanol, perturbing lipid-protein interactions in the membrane.
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Oleskin AV, Samuilov VD. The dibromothymoquinone effect on membrane potential generation in Rhodospirillum rubrum chromatophores. MEMBRANE BIOCHEMISTRY 1983; 5:77-95. [PMID: 6316108 DOI: 10.3109/09687688309149634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
2,5-Dibromo-3-methyl-6-isopropyl benzoquinone (DBMIB) inhibits the light-dependent membrane potential generation in Rhodospirillum rubrum chromatophores. The inhibition is relieved by electron donors and is obviously due to oxidation of the photosynthetic electron transfer chain components. In addition, high DBMIB concentrations elicit another effect probably caused by disruption of quinone functions in chromatophores. However, in quinone-depleted chromatophores and proteoliposomes containing the P-870 reaction center and light-harvesting antenna complexes, DBMIB stimulates membrane potential generation in the light, probably restoring some of the quinone-dependent processes in the membrane. DBMIB inhibits the inorganic pyrophosphate- and ATP-induced membrane potential generation in chromatophores.
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De Santis A, Bertoli E, Di Gioia A, Melandri BA, Baccarini Melandri A. The reconstitution of oxidative phosphorylation in mitochondria isolated from a ubiquinone-deficient mutant of Saccharomyces cerevisiae. J Bioenerg Biomembr 1982; 14:159-69. [PMID: 7047520 DOI: 10.1007/bf00745017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Mitochondria, isolated from the ubiquinone-deficient nuclear mutant of Saccharomyces cerevisiae E3-24, are practically unable to oxidize exogenous substrates. Respiratory activity, coupled to ATP synthesis, can, however, be reconstituted by the simple addition of ethanolic solutions of ubiquinones. A minimal length of the isoprenoid side chain (greater than or equal to 3) was required for the restoration. Saturation of the reconstitution required a large amount of exogeneous ubiquinone, in excess over the normal content present in the mitochondria of the wild type strain. A similar pattern of reconstituted activities could be also obtained using sonicated inverted particles. Mitochondria and sonicated particles are also able to carry out a dye-mediated electron flow coupled to ATP synthesis in the absence of added ubiquinone, using ascorbate or succinate as electron donor. This demonstrates that the energy conserving mechanism at the third coupling site of the respiratory chain is fully independent of the presence of the large mobile pool of ubiquinone in the membrane.
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