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Rendon DA. Important methodological aspects that should be taken into account during the research of isolated mitochondria. Anal Biochem 2020; 589:113492. [DOI: 10.1016/j.ab.2019.113492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 05/10/2019] [Accepted: 10/29/2019] [Indexed: 10/25/2022]
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2
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Dubinin MV, Samartsev VN, Stepanova AE, Khoroshavina EI, Penkov NV, Yashin VA, Starinets VS, Mikheeva IB, Gudkov SV, Belosludtsev KN. Membranotropic effects of ω-hydroxypalmitic acid and Ca2+ on rat liver mitochondria and lecithin liposomes. Aggregation and membrane permeabilization. J Bioenerg Biomembr 2018; 50:391-401. [DOI: 10.1007/s10863-018-9771-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 08/29/2018] [Indexed: 01/09/2023]
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3
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Belosludtsev KN, Belosludtseva NV, Tenkov KS, Penkov NV, Agafonov AV, Pavlik LL, Yashin VA, Samartsev VN, Dubinin MV. Study of the mechanism of permeabilization of lecithin liposomes and rat liver mitochondria by the antimicrobial drug triclosan. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:264-271. [PMID: 28939382 DOI: 10.1016/j.bbamem.2017.09.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 08/30/2017] [Accepted: 09/17/2017] [Indexed: 12/22/2022]
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4
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Lofrumento DD, La Piana G, Palmitessa V, Abbrescia DI, Lofrumento NE. Stimulation by pro-apoptotic valinomycin of cytosolic NADH/cytochrome c electron transport pathway-Effect of SH reagents. Int J Biochem Cell Biol 2016; 76:12-8. [PMID: 27129925 DOI: 10.1016/j.biocel.2016.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 04/14/2016] [Accepted: 04/25/2016] [Indexed: 01/27/2023]
Abstract
Intrinsic and extrinsic apoptosis are both characterised by the presence of cytochrome c (cyto-c) in the cytosol. We present data on the extra-mitochondrial NADH oxidation catalysed by exogenous (cytosolic) cyto-c, as a possible answer to the paradox of apoptosis being an energy-dependent program but characterized by the impairment of the respiratory chain. The reduction of molecular oxygen induced by the cytosolic NADH/cyto-c pathway is coupled to the generation of an electrochemical proton gradient available for ATP synthesis. Original findings show that SH reagents inhibit the NADH/cyto-c system with a conformational change mechanism. The mitochondrial integrity-test of sulfite oxidase unequivocally demonstrates that this enzyme (120kDa) can be released outside but exogenous cyto-c (12.5kDa) does not permeate into mitochondria. Valinomycin at 2nM stimulates both the energy-dependent reversible mitochondrial swelling and the NADH/cyto-c oxidation pathway. The pro-apoptotic activity of valinomycin, as well as to the dissipation of membrane potential, can be also ascribed to the increased activity of the NADH/cyto-c oxidation pathway useful as an additional source of energy for apoptosis. It can be speculated that the activation of the NADH/cyto-c system coupled to valinomycin-induced mitochondrial osmotic swelling may represent a strategy to activate apoptosis in confined solid tumours.
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Affiliation(s)
- Dario Domenico Lofrumento
- Department of Biological and Environmental Sciences and Technologies, Section of Human Anatomy, University of Salento, Lecce, Italy
| | - Gianluigi La Piana
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Bari, Italy
| | - Valeria Palmitessa
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Bari, Italy
| | | | - Nicola Elio Lofrumento
- Department of Biosciences, Biotechnology and Biopharmaceutics, University of Bari, Bari, Italy.
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5
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Lemeshko VV. Redox state-dependent aggregation of mitochondria induced by cytochrome c. Mol Cell Biochem 2011; 360:111-9. [PMID: 21904946 DOI: 10.1007/s11010-011-1049-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Accepted: 08/27/2011] [Indexed: 11/27/2022]
Abstract
Cytochrome c is known to play central role in apoptosis. Here, it is shown that ferricytochrome c, but not ferrocytochrome c is able to directly induce the aggregation of rat liver mitochondria, similar to the effect caused by magnesium ions at high concentrations. The aggregation was revealed by a decrease in light dispersion of mitochondrial suspension and it was confirmed by the optical microscopy. In the medium containing NADH and cytochrome c, mitochondrial aggregation was initiated only after exhaustion of NADH leading to oxidation of cytochrome c. The aggregation induced by 30 μM ferricytochrome c, but not by 5 mM MgCl(2), was completely inhibited by 30-100 μM ferricyanide, thus indicating that ferricyanide-cytochrome c specific interaction prevents mitochondrial aggregation. After completion of the aggregation caused by ferricytochrome c, this effect cannot be readily reversed by subsequent reduction of cytochrome c. The aggregation induced by ferricytochrome c and/or magnesium ions explains masking of the external NADH-oxidase activity of mitochondria in vitro reported in the literature. This new cytochrome c redox state-dependent phenomenon might also be involved in more complex mechanisms controlling aggregation (clustering) of mitochondria in vivo under the influence of pro-apoptotic factors and requires further study.
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Affiliation(s)
- Victor V Lemeshko
- Escuela de Física, Facultad de Ciencias, Universidad Nacional de Colombia, Medellín, Colombia.
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6
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Meratan AA, Ghasemi A, Nemat-Gorgani M. Membrane integrity and amyloid cytotoxicity: a model study involving mitochondria and lysozyme fibrillation products. J Mol Biol 2011; 409:826-38. [PMID: 21565199 DOI: 10.1016/j.jmb.2011.04.045] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 04/12/2011] [Accepted: 04/17/2011] [Indexed: 01/24/2023]
Abstract
Recent findings implicate that fibrillation products, the protein aggregates formed during the various steps leading to formation of mature fibrils, induce neurotoxicity predominantly in their intermediate oligomeric state. This has been shown to occur by increasing membrane permeability, eventually leading to cell death. Despite accumulating reports describing mechanisms of membrane permeabilization by oligomers in model membranes, studies directly targeted at characterizing the events occurring in biological membranes are rare. In the present report, we describe interaction of the original native structure, prefibrils and fibrils of hen egg white lysozyme (HEWL) with mitochondrial membranes, as an in vitro biological model, with the aim of gaining insight into possible mechanism of cytotoxicity at the membrane level. These structures were first characterized using a range of techniques, including fluorescence, size-exclusion chromatography, dynamic light scattering, transmission electron microscopy, dot blot analysis and circular dichroism. HEWL oligomers were found to be flexible/hydrophobic structures with the capacity to interact with mitochondrial membranes. Possible permeabilization of mitochondria was explored utilizing sensitive fluorometric and luminometric assays. Results presented demonstrate release of mitochondrial enzymes upon exposure to HEWL oligomers, but not native enzyme monomer or mature fibrils, in a concentration-dependent manner. Release of cytochrome c was also observed, as reported earlier, and membrane stabilization promoted by addition of calcium prevented release. Moreover, the oligomer-membrane interaction was influenced by high concentrations of NaCl and spermine. The observed release of proteins from mitochondria is suggested to occur by a nonspecific perturbation mechanism.
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Affiliation(s)
- Ali Akbar Meratan
- Institute of Biochemistry and Biophysics, University of Tehran, P.O. Box 13145-1384, 1417614411 Tehran, Iran
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7
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Isobe Y, Hida H, Nishino H. Circadian rhythm of metabolic oscillation in suprachiasmatic nucleus depends on the mitochondrial oxidation state, reflected by cytochrome C oxidase and lactate dehydrogenase. J Neurosci Res 2011; 89:929-35. [PMID: 21416482 DOI: 10.1002/jnr.22609] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Revised: 01/07/2011] [Accepted: 01/09/2011] [Indexed: 11/11/2022]
Abstract
Metabolic activity in the suprachiasmatic nucleus (SCN), a center of biological rhythm, is higher during the daytime than at night. The rhythmic oscillation in the SCN is feedback controlled by the Clock/Bmal1 heterodimer binding to the E-box in target genes (e.g., Arg-vasopressin). Similar transcriptional regulation by Npas2/Bmal1 heterodimer formation operates in the brain, which is dependent on the redox state (i.e., NAD/NADH). To clarify the metabolic function of SCN in relation to the redox state and glycolysis levels, we measured glucose, lactate dehydrogenase (LDH), LDH mRNA, and cytochrome C oxidase, energy-producing biochemical materials from mitochondria/cytosol, in rats kept under a light-dark cycle. Mitochondrial cytochrome C oxidase activity, measured by the changes in absorption at 550 nm, was higher during the light period than during the dark period. Glucose concentration was higher during the light period. In contrast, LDH and its coding mRNA were higher during the dark period. Mitochondrial aggregation, which is reflected by mitochondrial membrane potential, indexed by JC-1 fluorescence, was higher during the light period. The results indicate that the glycolysis energy pathway in the SCN, which exhits higher metabolic activity during the day than at night, might be involved in the generation of circadian rhythm.
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Affiliation(s)
- Yoshiaki Isobe
- Department of Neuro-Physiology and Science, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan. yisobe@ med.nagoya-cu.ac.jp
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8
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Potential-dependent membrane permeabilization and mitochondrial aggregation caused by anticancer polyarginine-KLA peptides. Arch Biochem Biophys 2010; 493:213-20. [DOI: 10.1016/j.abb.2009.11.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2009] [Revised: 11/04/2009] [Accepted: 11/04/2009] [Indexed: 11/21/2022]
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9
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Quijano JC, Lemeshko VV. Hemoglobin precipitation by polyethylene glycols leads to underestimation of membrane pore sizes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2008; 1778:2775-80. [DOI: 10.1016/j.bbamem.2008.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2008] [Revised: 07/12/2008] [Accepted: 07/15/2008] [Indexed: 11/17/2022]
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Parihar MS, Parihar A, Villamena FA, Vaccaro PS, Ghafourifar P. Inactivation of mitochondrial respiratory chain complex I leads mitochondrial nitric oxide synthase to become pro-oxidative. Biochem Biophys Res Commun 2008; 367:761-7. [DOI: 10.1016/j.bbrc.2008.01.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2008] [Accepted: 01/04/2008] [Indexed: 11/29/2022]
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Nazarewicz RR, Zenebe WJ, Parihar A, Parihar MS, Vaccaro M, Rink C, Sen CK, Ghafourifar P. 12(S)-hydroperoxyeicosatetraenoic acid (12-HETE) increases mitochondrial nitric oxide by increasing intramitochondrial calcium. Arch Biochem Biophys 2007; 468:114-20. [PMID: 17963719 DOI: 10.1016/j.abb.2007.09.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2007] [Revised: 09/24/2007] [Accepted: 09/25/2007] [Indexed: 10/22/2022]
Abstract
12(S)-hydroxyeicosatetraenoic acid (12-HETE) is one of the metabolites of arachidonic acid involved in pathological conditions associated with mitochondria and oxidative stress. The present study tested effects of 12-HETE on mitochondrial functions. In isolated rat heart mitochondria, 12-HETE increases intramitochondrial ionized calcium concentration that stimulates mitochondrial nitric oxide (NO) synthase (mtNOS) activity. mtNOS-derived NO causes mitochondrial dysfunctions by decreasing mitochondrial respiration and transmembrane potential. mtNOS-derived NO also produces peroxynitrite that induces release of cytochrome c and stimulates aggregation of mitochondria. Similarly, in HL-1 cardiac myocytes, 12-HETE increases intramitochondrial calcium and mitochondrial NO, and induces apoptosis. The present study suggests a novel mechanism for 12-HETE toxicity.
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Affiliation(s)
- Rafal R Nazarewicz
- Department of Surgery, Davis Heart and Lung Research Institute, Institute of Mitochondrial Biology, The Ohio State University, 460 West 12th Avenue, Columbus, OH 43210, USA
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12
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Nazarewicz RR, Zenebe WJ, Parihar A, Larson SK, Alidema E, Choi J, Ghafourifar P. Tamoxifen induces oxidative stress and mitochondrial apoptosis via stimulating mitochondrial nitric oxide synthase. Cancer Res 2007; 67:1282-90. [PMID: 17283165 DOI: 10.1158/0008-5472.can-06-3099] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Tamoxifen is an anticancer drug that induces oxidative stress and apoptosis via mitochondria-dependent and nitric oxide (NO)-dependent pathways. The present report shows that tamoxifen increases intramitochondrial ionized Ca(2+) concentration and stimulates mitochondrial NO synthase (mtNOS) activity in the mitochondria from rat liver and human breast cancer MCF-7 cells. By stimulating mtNOS, tamoxifen hampers mitochondrial respiration, releases cytochrome c, elevates mitochondrial lipid peroxidation, increases protein tyrosine nitration of certain mitochondrial proteins, decreases the catalytic activity of succinyl-CoA:3-oxoacid CoA-transferase, and induces aggregation of mitochondria. The present report suggests a critical role for mtNOS in apoptosis induced by tamoxifen.
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Affiliation(s)
- Rafal R Nazarewicz
- Vascular Surgery, Davis Heart and Lung Research Institute, and Institute of Mitochondrial Biology, Ohio State University Medical Center, 473 West 12th Avenue, Columbus, OH 43210, USA
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Lemeshko VV. Theoretical evaluation of a possible nature of the outer membrane potential of mitochondria. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2006; 36:57-66. [PMID: 17021806 DOI: 10.1007/s00249-006-0101-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Revised: 07/11/2006] [Accepted: 09/05/2006] [Indexed: 11/24/2022]
Abstract
A possibility of generation of the outer membrane potential in mitochondria has been suggested earlier in the literature, but the potential has not been directly measured yet. Even its nature, metabolic impact and a possible range of magnitudes are not clear, and require further theoretical and experimental analysis. Here, using simple mathematical model, we evaluated a possible contribution of the Donnan and metabolically derived potentials to the outer membrane potential, concluding that the superposition of both is most probable; exclusively Donnan origin of the potential is doubtful because unrealistically high concentrations of charged macromolecules are needed for maintaining its relatively high levels. Regardless of the mechanism(s) of generation, the maximal possible potential seems to be less than 30 mV because significant osmotic gradients, created at higher values, increase the probability of the outer membrane rupture. New experimental approaches for direct or indirect determination of true value of the outer membrane potential are suggested here to avoid a possible interference of the surface electrical potential of the inner membrane, which may change as a result of the extrusion of matrix protons under energization of mitochondria.
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Affiliation(s)
- Victor V Lemeshko
- Escuela de Física, Facultad de Ciencias, Universidad Nacional de Colombia, Calle 65, Cra. 64, Medellín AA3840, Colombia.
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14
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La Piana G, Marzulli D, Gorgoglione V, Lofrumento NE. Porin and cytochrome oxidase containing contact sites involved in the oxidation of cytosolic NADH. Arch Biochem Biophys 2005; 436:91-100. [PMID: 15752713 DOI: 10.1016/j.abb.2004.12.029] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2004] [Revised: 12/22/2004] [Indexed: 11/16/2022]
Abstract
Cytochrome c (cyto-c) added to isolated mitochondria promotes the oxidation of extra-mitochondrial NADH and the reduction of molecular oxygen associated to the generation of an electrochemical membrane potential available for ATP synthesis. The electron transport pathway activated by exogenous cyto-c molecules is completely distinct from the one catalyzed by the respiratory chain. Dextran sulfate (500 kDa), known to interact with porin (the voltage-dependent anion channel), other than to inhibit the release of ATP synthesized inside the mitochondria, greatly decreases the activity of exogenous NADH/cyto-c system of intact mitochondria but has no effect on the reconstituted system made of mitoplasts and external membrane preparations. The results obtained are consistent with the existence of specific contact sites containing cytochrome oxidase and porin, as components of the inner and the outer membrane respectively, involved in the oxidation of cytosolic NADH. The proposal is put forward that the bi-trans-membrane electron transport chain activated by cytosolic cyto-c becomes, in physio-pathological conditions: (i) functional in removing the excess of cytosolic NADH; (ii) essential for cell survival in the presence of an impairment of the first three respiratory complexes; and (iii) an additional source of energy at the beginning of apoptosis.
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Affiliation(s)
- Gianluigi La Piana
- Department of Biochemistry and Molecular Biology, University of Bari, via Orabona 4, 70126 Bari, Italy
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15
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Lemeshko VV, Arias M, Orduz S. Mitochondria Permeabilization by a Novel Polycation Peptide BTM-P1. J Biol Chem 2005; 280:15579-86. [PMID: 15713682 DOI: 10.1074/jbc.m414064200] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Bacillus thuringiensis subsp. medellin is known to produce the Cry11Bb protein of 94 kDa, which is toxic for mosquito larvae due to permeabilization of the plasma membrane of midgut epithelial cells. Earlier we found that a 2.8-kDa novel peptide BTM-P1, which was artificially synthesized taking into account the primary structure of Cry11Bb endotoxin, is active against several species of bacteria. In this work we show that BTM-P1 induces cyclosporin A-insensitive swelling of rat liver mitochondria in various salt solutions but not in the sucrose medium. Inorganic phosphate and Ca(2+) significantly increased this effect of the peptide. The uncoupling action of BTM-P1 on oxidative phosphorylation was stronger in the potassium-containing media and correlated with a decrease of the inner membrane potential of mitochondria. In isotonic KNO(3), KCl, or NH(4)NO(3) media, a complete drop of the inner membrane potential was observed at 1-2 microg/ml of the peptide. The peptide-induced swelling was increased by energization of mitochondria in the potassium-containing media, but it was inhibited in the NaNO(3), NH(4)NO(3), and Tris-NO(3) media. All mitochondrial effects of the peptide were completely prevented by adding a single N-terminal tryptophan residue to the peptide sequence. We suggest a mechanism of membrane permeabilization that includes a transmembrane- and surface potential-dependent insertion of the polycation peptide into the lipid bilayer and its oligomerization leading to formation of ion channels and also to the mitochondrial permeability transition pore opening in a cyclosporin A-insensitive manner.
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Affiliation(s)
- Victor V Lemeshko
- Escuela de Física, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Medellín, AA 3840 Medellín, Colombia.
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