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Nesci S, Algieri C, Tallarida MA, Stanzione R, Marchi S, Pietrangelo D, Trombetti F, D'Ambrosio L, Forte M, Cotugno M, Nunzi I, Bigi R, Maiuolo L, De Nino A, Pinton P, Romeo G, Rubattu S. Molecular mechanisms of naringenin modulation of mitochondrial permeability transition acting on F 1F O-ATPase and counteracting saline load-induced injury in SHRSP cerebral endothelial cells. Eur J Cell Biol 2024; 103:151398. [PMID: 38368729 DOI: 10.1016/j.ejcb.2024.151398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/18/2024] [Accepted: 02/13/2024] [Indexed: 02/20/2024] Open
Abstract
Naringenin (NRG) was characterized for its ability to counteract mitochondrial dysfunction which is linked to cardiovascular diseases. The F1FO-ATPase can act as a molecular target of NRG. The interaction of NRG with this enzyme can avoid the energy transmission mechanism of ATP hydrolysis, especially in the presence of Ca2+ cation used as cofactor. Indeed, NRG was a selective inhibitor of the hydrophilic F1 domain displaying a binding site overlapped with quercetin in the inside surface of an annulus made by the three α and the three β subunits arranged alternatively in a hexamer. The kinetic constant of inhibition suggested that NRG preferred the enzyme activated by Ca2+ rather than the F1FO-ATPase activated by the natural cofactor Mg2+. From the inhibition type mechanism of NRG stemmed the possibility to speculate that NRG can prevent the activation of F1FO-ATPase by Ca2+. The event correlated to the protective role in the mitochondrial permeability transition pore opening by NRG as well as to the reduction of ROS production probably linked to the NRG chemical structure with antioxidant action. Moreover, in primary cerebral endothelial cells (ECs) obtained from stroke prone spontaneously hypertensive rats NRG had a protective effect on salt-induced injury by restoring cell viability and endothelial cell tube formation while also rescuing complex I activity.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy.
| | - Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | | | | | - Saverio Marchi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona 60126, Italy
| | - Donatella Pietrangelo
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome 00189, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | - Luca D'Ambrosio
- Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina 04100, Italy
| | | | | | - Ilaria Nunzi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona 60126, Italy
| | - Rachele Bigi
- Department of Neuroscience, Mental Health, and Sensory Organs, Sapienza University, Rome 00189, Italy
| | - Loredana Maiuolo
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | - Antonio De Nino
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | - Paolo Pinton
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, Cotignola 48033, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, Ferrara 44121, Italy
| | - Giovanni Romeo
- Medical Genetics Unit, Sant'Orsola-Malpighi University Hospital, Bologna 40126, Italy
| | - Speranza Rubattu
- IRCCS Neuromed, Pozzilli 86077, Italy; Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome 00189, Italy
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Li W, Li Y, Zhao J, Liao J, Wen W, Chen Y, Cui H. Release of damaged mitochondrial DNA: A novel factor in stimulating inflammatory response. Pathol Res Pract 2024; 258:155330. [PMID: 38733868 DOI: 10.1016/j.prp.2024.155330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 04/03/2024] [Accepted: 04/23/2024] [Indexed: 05/13/2024]
Abstract
Mitochondrial DNA (mtDNA) is a circular double-stranded genome that exists independently of the nucleus. In recent years, research on mtDNA has significantly increased, leading to a gradual increase in understanding of its physiological and pathological characteristics. Reactive oxygen species (ROS) and other factors can damage mtDNA. This damaged mtDNA can escape from the mitochondria to the cytoplasm or extracellular space, subsequently activating immune signaling pathways, such as NLR family pyrin domain protein 3 (NLRP3), and triggering inflammatory responses. Numerous studies have demonstrated the involvement of mtDNA damage and leakage in the pathological mechanisms underlying various diseases including infectious diseases, metabolic inflammation, and immune disorders. Consequently, comprehensive investigation of mtDNA can elucidate the pathological mechanisms underlying numerous diseases. The prevention of mtDNA damage and leakage has emerged as a novel approach to disease treatment, and mtDNA has emerged as a promising target for drug development. This article provides a comprehensive review of the mechanisms underlying mtDNA-induced inflammation, its association with various diseases, and the methods used for its detection.
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Affiliation(s)
- Wenting Li
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Yunnan 650500, China
| | - Yuting Li
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin 300193, China
| | - Jie Zhao
- Department of TCM Endocrinology, Yunnan Provincial Hospital of Traditional Chinese Medicine, Yunnan 650021, China
| | - Jiabao Liao
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Yunnan 650500, China
| | - Weibo Wen
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Yunnan 650500, China.
| | - Yao Chen
- Department of TCM Encephalopathy, Yunnan Provincial Hospital of Traditional Chinese Medicine, Yunnan 650021, China.
| | - Huantian Cui
- The First School of Clinical Medicine, Yunnan University of Chinese Medicine, Yunnan 650500, China.
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3
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Algieri C, Oppedisano F, Trombetti F, Fabbri M, Palma E, Nesci S. Selenite ameliorates the ATP hydrolysis of mitochondrial F 1F O-ATPase by changing the redox state of thiol groups and impairs the ADP phosphorylation. Free Radic Biol Med 2024; 210:333-343. [PMID: 38056573 DOI: 10.1016/j.freeradbiomed.2023.11.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/19/2023] [Accepted: 11/29/2023] [Indexed: 12/08/2023]
Abstract
Selenite as an inorganic form of selenium can affect the redox state of mitochondria by modifying the thiol groups of cysteines. The F1FO-ATPase has been identified as a mitochondrial target of this compound. Indeed, the bifunctional mechanism of ATP turnover of F1FO-ATPase was differently modified by selenite. The activity of ATP hydrolysis was stimulated, whereas the ADP phosphorylation was inhibited. We ascertain that a possible new protein adduct identified as seleno-dithiol (-S-Se-S-) mercaptoethanol-sensitive caused the activation of F-ATPase activity and the oxidation of free -SH groups in mitochondria. Conversely, the inhibition of ATP synthesis by selenite might be irreversible. The kinetic analysis of the activation mechanism was an uncompetitive mixed type with respect to the ATP substrate. Selenite bound more selectively to the F1FO-ATPase loaded with the substrate by preferentially forming a tertiary (enzyme-ATP-selenite) complex. Otherwise, the selenite was a competitive mixed-type activator with respect to the Mg2+ cofactor. Thus, selenite more specifically bound to the free enzyme forming the complex enzyme-selenite. However, even if the selenite impaired the catalysis of F1FO-ATPase, the mitochondrial permeability transition pore phenomenon was unaffected. Therefore, the reversible energy transduction mechanism of F1FO-ATPase can be oppositely regulated by selenite.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, 40064, Ozzano Emilia, Italy
| | - Francesca Oppedisano
- Department of Health Sciences, Institute of Research for Food Safety and Health (IRC-FSH), University "Magna Græcia" of Catanzaro, 88100, Catanzaro, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, 40064, Ozzano Emilia, Italy
| | - Micaela Fabbri
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, 40064, Ozzano Emilia, Italy
| | - Ernesto Palma
- Department of Health Sciences, Institute of Research for Food Safety and Health (IRC-FSH), University "Magna Græcia" of Catanzaro, 88100, Catanzaro, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, 40064, Ozzano Emilia, Italy.
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Nesci S, Spagnoletta A, Oppedisano F. Inflammation, Mitochondria and Natural Compounds Together in the Circle of Trust. Int J Mol Sci 2023; 24:ijms24076106. [PMID: 37047080 PMCID: PMC10094238 DOI: 10.3390/ijms24076106] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 03/12/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
Human diseases are characterized by the perpetuation of an inflammatory condition in which the levels of Reactive Oxygen Species (ROS) are quite high. Excessive ROS production leads to DNA damage, protein carbonylation and lipid peroxidation, conditions that lead to a worsening of inflammatory disorders. In particular, compromised mitochondria sustain a stressful condition in the cell, such that mitochondrial dysfunctions become pathogenic, causing human disorders related to inflammatory reactions. Indeed, the triggered inflammation loses its beneficial properties and turns harmful if dysregulation and dysfunctions are not addressed. Thus, reducing oxidative stress with ROS scavenger compounds has proven to be a successful approach to reducing inflammation. Among these, natural compounds, in particular, polyphenols, alkaloids and coenzyme Q10, thanks to their antioxidant properties, are capable of inhibiting the activation of NF-κB and the expression of target genes, including those involved in inflammation. Even more, clinical trials, and in vivo and in vitro studies have demonstrated the antioxidant and anti-inflammatory effects of phytosomes, which are capable of increasing the bioavailability and effectiveness of natural compounds, and have long been considered an effective non-pharmacological therapy. Therefore, in this review, we wanted to highlight the relationship between inflammation, altered mitochondrial oxidative activity in pathological conditions, and the beneficial effects of phytosomes. To this end, a PubMed literature search was conducted with a focus on various in vitro and in vivo studies and clinical trials from 2014 to 2022.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-Università di Bologna, 40064 Ozzano Emilia, Italy
| | - Anna Spagnoletta
- ENEA Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Trisaia Research Center, 75026 Rotondella, Italy
| | - Francesca Oppedisano
- Department of Health Sciences, Institute of Research for Food Safety and Health (IRC-FSH), University "Magna Graecia" of Catanzaro, 88100 Catanzaro, Italy
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5
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Algieri V, Algieri C, Costanzo P, Fiorani G, Jiritano A, Olivito F, Tallarida MA, Trombetti F, Maiuolo L, De Nino A, Nesci S. Novel Regioselective Synthesis of 1,3,4,5-Tetrasubstituted Pyrazoles and Biochemical Valuation on F 1F O-ATPase and Mitochondrial Permeability Transition Pore Formation. Pharmaceutics 2023; 15:pharmaceutics15020498. [PMID: 36839821 PMCID: PMC9967880 DOI: 10.3390/pharmaceutics15020498] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/20/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
An efficient, eco-compatible, and very cheap method for the construction of fully substituted pyrazoles (Pzs) via eliminative nitrilimine-alkene 1,3-dipolar cycloaddition (ENAC) reaction was developed in excellent yield and high regioselectivity. Enaminones and nitrilimines generated in situ were selected as dipolarophiles and dipoles, respectively. A deep screening of the employed base, solvent, and temperature was carried out to optimize reaction conditions. Recycling tests of ionic liquid were performed, furnishing efficient performance until six cycles. Finally, a plausible mechanism of cycloaddition was proposed. Then, the effect of three different structures of Pzs was evaluated on the F1FO-ATPase activity and mitochondrial permeability transition pore (mPTP) opening. The Pz derivatives' titration curves of 6a, 6h, and 6o on the F1FO-ATPase showed a reduced activity of 86%, 35%, and 31%, respectively. Enzyme inhibition analysis depicted an uncompetitive mechanism with the typical formation of the tertiary complex enzyme-substrate-inhibitor (ESI). The dissociation constant of the ESI complex (Ki') in the presence of the 6a had a lower order of magnitude than other Pzs. The pyrazole core might set the specific mechanism of inhibition with the F1FO-ATPase, whereas specific functional groups of Pzs might modulate the binding affinity. The mPTP opening decreased in Pz-treated mitochondria and the Pzs' inhibitory effect on the mPTP was concentration-dependent with 6a and 6o. Indeed, the mPTP was more efficiently blocked with 0.1 mM 6a than with 1 mM 6a. On the contrary, 1 mM 6o had stronger desensitization of mPTP formation than 0.1 mM 6o. The F1FO-ATPase is a target of Pzs blocking mPTP formation.
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Affiliation(s)
- Vincenzo Algieri
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
- Correspondence: (V.A.); (A.D.N.)
| | - Cristina Algieri
- Department of Veterinary Medical Sciences, Mitochondrial Biochemistry Lab, Via Tolara di Sopra, 50, 40064 Ozzano Emilia, BO, Italy
| | - Paola Costanzo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
| | - Giulia Fiorani
- Department Molecular Sciences and Nanosystems, University Ca’ Foscari Venezia, Via Torino 155, 30172 Venezia Mestre, VE, Italy
| | - Antonio Jiritano
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
| | - Fabrizio Olivito
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
| | - Matteo Antonio Tallarida
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, Mitochondrial Biochemistry Lab, Via Tolara di Sopra, 50, 40064 Ozzano Emilia, BO, Italy
| | - Loredana Maiuolo
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
| | - Antonio De Nino
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, Cubo 12C, 87036 Rende, CS, Italy
- Correspondence: (V.A.); (A.D.N.)
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, Mitochondrial Biochemistry Lab, Via Tolara di Sopra, 50, 40064 Ozzano Emilia, BO, Italy
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6
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Algieri C, Bernardini C, Marchi S, Forte M, Tallarida MA, Bianchi F, La Mantia D, Algieri V, Stanzione R, Cotugno M, Costanzo P, Trombetti F, Maiuolo L, Forni M, De Nino A, Di Nonno F, Sciarretta S, Volpe M, Rubattu S, Nesci S. 1,5-disubstituted-1,2,3-triazoles counteract mitochondrial dysfunction acting on F 1F O-ATPase in models of cardiovascular diseases. Pharmacol Res 2023; 187:106561. [PMID: 36410676 DOI: 10.1016/j.phrs.2022.106561] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/08/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022]
Abstract
The compromised viability and function of cardiovascular cells are rescued by small molecules of triazole derivatives (Tzs), identified as 3a and 3b, by preventing mitochondrial dysfunction. The oxidative phosphorylation improves the respiratory control rate in the presence of Tzs independently of the substrates that energize the mitochondria. The F1FO-ATPase, the main candidate in mitochondrial permeability transition pore (mPTP) formation, is the biological target of Tzs and hydrophilic F1 domain of the enzyme is depicted as the binding region of Tzs. The protective effect of Tz molecules on isolated mitochondria was corroborated by immortalized cardiomyocytes results. Indeed, mPTP opening was attenuated in response to ionomycin. Consequently, increased mitochondrial roundness and reduction of both length and interconnections between mitochondria. In in-vitro and ex-vivo models of cardiovascular pathologies (i.e., hypoxia-reoxygenation and hypertension) were used to evaluate the Tzs cardioprotective action. Key parameters of porcine aortic endothelial cells (pAECs) oxidative metabolism and cell viability were not affected by Tzs. However, in the presence of either 1 μM 3a or 0.5 μM 3b the impaired cell metabolism of pAECs injured by hypoxia-reoxygenation was restored to control respiratory profile. Moreover, endothelial cells isolated from SHRSP exposed to high-salt treatment rescued the Complex I activity and the endothelial capability to form vessel-like tubes and vascular function in presence of Tzs. As a result, the specific biochemical mechanism of Tzs to block Ca2+-activated F1FO-ATPase protected cell viability and preserved the pAECs bioenergetic metabolism upon hypoxia-reoxygenation injury. Moreover, SHRSP improved vascular dysfunction in response to a high-salt treatment.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | - Chiara Bernardini
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | - Saverio Marchi
- Department of Clinical and Molecular Sciences, Marche Polytechnic University, Ancona 60126, Italy
| | | | | | | | - Debora La Mantia
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | - Vincenzo Algieri
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | | | | | - Paola Costanzo
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy
| | - Loredana Maiuolo
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | - Monica Forni
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy; Health Sciences and Technologies-Interdepartmental Center for Industrial Research (CIRI-SDV), Alma Mater Studiorum-University of Bologna, Bologna 40126, Italy
| | - Antonio De Nino
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza 87036, Italy
| | | | - Sebastiano Sciarretta
- IRCCS Neuromed, Pozzilli 86077, Italy; Department of Medical-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Latina 04100, Italy
| | - Massimo Volpe
- Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome 00189, Italy; IRCCS San Raffaele, Rome 00163, Italy
| | - Speranza Rubattu
- IRCCS Neuromed, Pozzilli 86077, Italy; Department of Clinical and Molecular Medicine, Sapienza University of Rome, Rome 00189, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia 40064, Italy.
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Nesci S. What happens when the mitochondrial H +-translocating F 1F O-ATP(hydrol)ase becomes a molecular target of calcium? The pore opens. Biochimie 2022; 198:92-95. [PMID: 35367315 DOI: 10.1016/j.biochi.2022.03.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/19/2022] [Accepted: 03/28/2022] [Indexed: 12/29/2022]
Abstract
The F1FO-ATPase has Mg2+ cofactor as the natural divalent cation to support the bifunctional activity of ATP synthesis and hydrolysis. Different physio(patho)logical conditions permit the molecular interaction of Ca2+ with the enzyme and the modification of the biological role. Three distinct binding regions of Ca2+ have been localized on the enzyme complex: one in the F1 catalytic sites and the other two sites in the membrane-embedded domain FO. In all likelihood, Ca2+-activated enzyme most frequently works as an H+-translocating F1FO-ATP(hydrol)ase with a monofunctional activity that triggers the formation of mitochondrial permeability transition pore (mPTP) phenomenon. The protein(s) component of the mPTP is considered an arcane mystery. However, the F1FO-ATPase could reveal the molecular mechanism of pore opening when Ca2+ is bound to the enzyme. In this regard, the role of Ca2+-dependent function of the F1FO-ATPase in the formation of the mPTP is discussed.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy.
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Algieri C, Bernardini C, Oppedisano F, La Mantia D, Trombetti F, Palma E, Forni M, Mollace V, Romeo G, Nesci S. Mitochondria Bioenergetic Functions and Cell Metabolism Are Modulated by the Bergamot Polyphenolic Fraction. Cells 2022; 11:cells11091401. [PMID: 35563707 PMCID: PMC9099917 DOI: 10.3390/cells11091401] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/08/2022] [Accepted: 04/19/2022] [Indexed: 02/01/2023] Open
Abstract
The bergamot polyphenolic fraction (BPF) was evaluated in the F1FO-ATPase activity of swine heart mitochondria. In the presence of a concentration higher than 50 µg/mL BPF, the ATPase activity of F1FO-ATPase, dependent on the natural cofactor Mg2+, increased by 15%, whereas the enzyme activity in the presence of Ca2+ was inhibited by 10%. By considering this opposite BPF effect, the F1FO-ATPase activity involved in providing ATP synthesis in oxidative phosphorylation and triggering mitochondrial permeability transition pore (mPTP) formation has been evaluated. The BPF improved the catalytic coupling of oxidative phosphorylation in the presence of a substrate at the first phosphorylation site, boosting the respiratory control ratios (state 3/state 4) by 25% and 85% with 50 µg/mL and 100 µg/mL BPF, respectively. Conversely, the substrate at the second phosphorylation site led to the improvement of the state 3/state 4 ratios by 15% only with 100 µg/mL BPF. Moreover, the BPF carried out its beneficial effect on the mPTP phenomenon by desensitizing the pore opening. The acute effect of the BPF on the metabolism of porcine aortica endothelial cells (pAECs) showed an ATP rate index greater than one, which points out a prevailing mitochondrial oxidative metabolism with respect to the glycolytic pathway, and this ratio rose by about three times with 100 µg/mL BPF. Consistently, the mitochondrial ATP turnover, in addition to the basal and maximal respiration, were higher in the presence of the BPF than in the controls, and the MTT test revealed an increase in cell viability with a BPF concentration above 200 µg/mL. Therefore, the molecule mixture of the BPF aims to ensure good performance of the mitochondrial bioenergetic parameters.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
| | - Chiara Bernardini
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
| | - Francesca Oppedisano
- Department of Health Sciences, Institute of Research for Food Safety & Health (IRC-FSH), University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy;
- Correspondence: (F.O.); (V.M.)
| | - Debora La Mantia
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
| | - Ernesto Palma
- Department of Health Sciences, Institute of Research for Food Safety & Health (IRC-FSH), University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy;
| | - Monica Forni
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (CIRI-SDV), Alma Mater Studiorum, University of Bologna, 40126 Bologna, Italy
| | - Vincenzo Mollace
- Department of Health Sciences, Institute of Research for Food Safety & Health (IRC-FSH), University Magna Graecia of Catanzaro, 88100 Catanzaro, Italy;
- Correspondence: (F.O.); (V.M.)
| | - Giovanni Romeo
- Department Gynecological, Obstetrical and Pediatric Sciences, Medical Genetics Unit, Sant’Orsola-Malpighi University Hospital, 40126 Bologna, Italy;
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, 40064 Ozzano Emilia, Italy; (C.A.); (C.B.); (D.L.M.); (F.T.); (M.F.); (S.N.)
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9
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Molecular mechanisms and consequences of mitochondrial permeability transition. Nat Rev Mol Cell Biol 2022; 23:266-285. [PMID: 34880425 DOI: 10.1038/s41580-021-00433-y] [Citation(s) in RCA: 197] [Impact Index Per Article: 98.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2021] [Indexed: 12/29/2022]
Abstract
Mitochondrial permeability transition (mPT) is a phenomenon that abruptly causes the flux of low molecular weight solutes (molecular weight up to 1,500) across the generally impermeable inner mitochondrial membrane. The mPT is mediated by the so-called mitochondrial permeability transition pore (mPTP), a supramolecular entity assembled at the interface of the inner and outer mitochondrial membranes. In contrast to mitochondrial outer membrane permeabilization, which mostly activates apoptosis, mPT can trigger different cellular responses, from the physiological regulation of mitophagy to the activation of apoptosis or necrosis. Although there are several molecular candidates for the mPTP, its molecular nature remains contentious. This lack of molecular data was a significant setback that prevented mechanistic insight into the mPTP, pharmacological targeting and the generation of informative animal models. In recent years, experimental evidence has highlighted mitochondrial F1Fo ATP synthase as a participant in mPTP formation, although a molecular model for its transition to the mPTP is still lacking. Recently, the resolution of the F1Fo ATP synthase structure by cryogenic electron microscopy led to a model for mPTP gating. The elusive molecular nature of the mPTP is now being clarified, marking a turning point for understanding mitochondrial biology and its pathophysiological ramifications. This Review provides an up-to-date reference for the understanding of the mammalian mPTP and its cellular functions. We review current insights into the molecular mechanisms of mPT and validated observations - from studies in vivo or in artificial membranes - on mPTP activity and functions. We end with a discussion of the contribution of the mPTP to human disease. Throughout the Review, we highlight the multiple unanswered questions and, when applicable, we also provide alternative interpretations of the recent discoveries.
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Garone C, Pietra A, Nesci S. From the Structural and (Dys)Function of ATP Synthase to Deficiency in Age-Related Diseases. Life (Basel) 2022; 12:life12030401. [PMID: 35330152 PMCID: PMC8949411 DOI: 10.3390/life12030401] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 02/25/2022] [Accepted: 03/08/2022] [Indexed: 12/21/2022] Open
Abstract
The ATP synthase is a mitochondrial inner membrane complex whose function is essential for cell bioenergy, being responsible for the conversion of ADP into ATP and playing a role in mitochondrial cristae morphology organization. The enzyme is composed of 18 protein subunits, 16 nuclear DNA (nDNA) encoded and two mitochondrial DNA (mtDNA) encoded, organized in two domains, FO and F1. Pathogenetic variants in genes encoding structural subunits or assembly factors are responsible for fatal human diseases. Emerging evidence also underlines the role of ATP-synthase in neurodegenerative diseases as Parkinson’s, Alzheimer’s, and motor neuron diseases such as Amyotrophic Lateral Sclerosis. Post-translational modification, epigenetic modulation of ATP gene expression and protein level, and the mechanism of mitochondrial transition pore have been deemed responsible for neuronal cell death in vivo and in vitro models for neurodegenerative diseases. In this review, we will explore ATP synthase assembly and function in physiological and pathological conditions by referring to the recent cryo-EM studies and by exploring human disease models.
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Affiliation(s)
- Caterina Garone
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40137 Bologna, Italy;
- Center for Applied Biomedical Research, Alma Mater Studiorum University of Bologna, 40137 Bologna, Italy
- UOC Neuropsichiatria dell’età Pediatrica, IRCCS Istituto delle Scienze Neurologiche di Bologna, 40137 Bologna, Italy
- Correspondence: (C.G.); (S.N.); Tel.: +39-051-2094763 (C.G.); Tel.: +39-051-209-7004 (S.N.)
| | - Andrea Pietra
- Department of Medical and Surgical Sciences, Alma Mater Studiorum University of Bologna, 40137 Bologna, Italy;
- UO Genetica Medica, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40137 Bologna, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy
- Correspondence: (C.G.); (S.N.); Tel.: +39-051-2094763 (C.G.); Tel.: +39-051-209-7004 (S.N.)
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11
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Algieri C, Trombetti F, Pagliarani A, Ventrella V, Nesci S. The mitochondrial F 1F O-ATPase exploits the dithiol redox state to modulate the permeability transition pore. Arch Biochem Biophys 2021; 712:109027. [PMID: 34520732 DOI: 10.1016/j.abb.2021.109027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/06/2021] [Accepted: 09/07/2021] [Indexed: 01/02/2023]
Abstract
The dithiol reagents phenylarsine oxide (PAO) and dibromobimane (DBrB) have opposite effects on the F1FO-ATPase activity. PAO 20% increases ATP hydrolysis at 50 μM when the enzyme activity is activated by the natural cofactor Mg2+ and at 150 μM when it is activated by Ca2+. The PAO-driven F1FO-ATPase activation is reverted to the basal activity by 50 μM dithiothreitol (DTE). Conversely, 300 μM DBrB decreases the F1FO-ATPase activity by 25% when activated by Mg2+ and by 50% when activated by Ca2+. In both cases, the F1FO-ATPase inhibition by DBrB is insensitive to DTE. The mitochondrial permeability transition pore (mPTP) formation, related to the Ca2+-dependent F1FO-ATPase activity, is stimulated by PAO and desensitized by DBrB. Since PAO and DBrB apparently form adducts with different cysteine couples, the results highlight the crucial role of cross-linking of vicinal dithiols on the F1FO-ATPase, with (ir)reversible redox states, in the mPTP modulation.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, Bologna, 40064, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, Bologna, 40064, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, Bologna, 40064, Italy
| | - Vittoria Ventrella
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, Bologna, 40064, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, Bologna, 40064, Italy.
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12
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Nirody JA, Budin I, Rangamani P. ATP synthase: Evolution, energetics, and membrane interactions. J Gen Physiol 2021; 152:152111. [PMID: 32966553 PMCID: PMC7594442 DOI: 10.1085/jgp.201912475] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/24/2020] [Indexed: 12/24/2022] Open
Abstract
The synthesis of ATP, life’s “universal energy currency,” is the most prevalent chemical reaction in biological systems and is responsible for fueling nearly all cellular processes, from nerve impulse propagation to DNA synthesis. ATP synthases, the family of enzymes that carry out this endless task, are nearly as ubiquitous as the energy-laden molecule they are responsible for making. The F-type ATP synthase (F-ATPase) is found in every domain of life and has facilitated the survival of organisms in a wide range of habitats, ranging from the deep-sea thermal vents to the human intestine. Accordingly, there has been a large amount of work dedicated toward understanding the structural and functional details of ATP synthases in a wide range of species. Less attention, however, has been paid toward integrating these advances in ATP synthase molecular biology within the context of its evolutionary history. In this review, we present an overview of several structural and functional features of the F-type ATPases that vary across taxa and are purported to be adaptive or otherwise evolutionarily significant: ion channel selectivity, rotor ring size and stoichiometry, ATPase dimeric structure and localization in the mitochondrial inner membrane, and interactions with membrane lipids. We emphasize the importance of studying these features within the context of the enzyme’s particular lipid environment. Just as the interactions between an organism and its physical environment shape its evolutionary trajectory, ATPases are impacted by the membranes within which they reside. We argue that a comprehensive understanding of the structure, function, and evolution of membrane proteins—including ATP synthase—requires such an integrative approach.
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Affiliation(s)
- Jasmine A Nirody
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY.,All Souls College, University of Oxford, Oxford, UK
| | - Itay Budin
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA
| | - Padmini Rangamani
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA
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13
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Algieri C, Trombetti F, Pagliarani A, Fabbri M, Nesci S. The inhibition of gadolinium ion (Gd 3+) on the mitochondrial F 1F O-ATPase is linked to the modulation of the mitochondrial permeability transition pore. Int J Biol Macromol 2021; 184:250-258. [PMID: 34126146 DOI: 10.1016/j.ijbiomac.2021.06.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 12/18/2022]
Abstract
The mitochondrial permeability transition pore (PTP), which drives regulated cell death when Ca2+ concentration suddenly increases in mitochondria, was related to changes in the Ca2+-activated F1FO-ATPase. The effects of the gadolinium cation (Gd3+), widely used for diagnosis and therapy, and reported as PTP blocker, were evaluated on the F1FO-ATPase activated by Mg2+ or Ca2+ and on the PTP. Gd3+ more effectively inhibits the Ca2+-activated F1FO-ATPase than the Mg2+-activated F1FO-ATPase by a mixed-type inhibition on the former and by uncompetitive mechanism on the latter. Most likely Gd3+ binding to F1, is favoured by Ca2+ insertion. The maximal inactivation rates (kinact) of pseudo-first order inactivation are similar either when the F1FO-ATPase is activated by Ca2+ or by Mg2+. The half-maximal inactivator concentrations (KI) are 2.35 ± 0.35 mM and 0.72 ± 0.11 mM, respectively. The potency of a mechanism-based inhibitor (kinact/KI) also highlights a higher inhibition efficiency of Gd3+ on the Ca2+-activated F1FO-ATPase (0.59 ± 0.09 mM-1∙s-1) than on the Mg2+-activated F1FO-ATPase (0.13 ± 0.02 mM-1∙s-1). Consistently, the PTP is desensitized in presence of Gd3+. The Gd3+ inhibition on both the mitochondrial Ca2+-activated F1FO-ATPase and the PTP strengthens the link between the PTP and the F1FO-ATPase when activated by Ca2+ and provides insights on the biological effects of Gd3+.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy.
| | - Micaela Fabbri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy.
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Morciano G, Vitto VAM, Bouhamida E, Giorgi C, Pinton P. Mitochondrial Bioenergetics and Dynamism in the Failing Heart. Life (Basel) 2021; 11:life11050436. [PMID: 34066065 PMCID: PMC8151847 DOI: 10.3390/life11050436] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/07/2021] [Accepted: 05/07/2021] [Indexed: 12/13/2022] Open
Abstract
The heart is responsible for pumping blood, nutrients, and oxygen from its cavities to the whole body through rhythmic and vigorous contractions. Heart function relies on a delicate balance between continuous energy consumption and generation that changes from birth to adulthood and depends on a very efficient oxidative metabolism and the ability to adapt to different conditions. In recent years, mitochondrial dysfunctions were recognized as the hallmark of the onset and development of manifold heart diseases (HDs), including heart failure (HF). HF is a severe condition for which there is currently no cure. In this condition, the failing heart is characterized by a disequilibrium in mitochondrial bioenergetics, which compromises the basal functions and includes the loss of oxygen and substrate availability, an altered metabolism, and inefficient energy production and utilization. This review concisely summarizes the bioenergetics and some other mitochondrial features in the heart with a focus on the features that become impaired in the failing heart.
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Affiliation(s)
- Giampaolo Morciano
- Maria Cecilia Hospital, GVM Care&Research, 48033 Cotignola, Italy
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
- Correspondence: (G.M.); (P.P.)
| | - Veronica Angela Maria Vitto
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Esmaa Bouhamida
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Carlotta Giorgi
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
| | - Paolo Pinton
- Maria Cecilia Hospital, GVM Care&Research, 48033 Cotignola, Italy
- Laboratory for Technologies of Advanced Therapies (LTTA), Section of Experimental Medicine, Department of Medical Sciences, University of Ferrara, 44121 Ferrara, Italy; (V.A.M.V.); (E.B.); (C.G.)
- Correspondence: (G.M.); (P.P.)
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15
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Nesci S, Trombetti F, Pagliarani A, Ventrella V, Algieri C, Tioli G, Lenaz G. Molecular and Supramolecular Structure of the Mitochondrial Oxidative Phosphorylation System: Implications for Pathology. Life (Basel) 2021; 11:242. [PMID: 33804034 PMCID: PMC7999509 DOI: 10.3390/life11030242] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/09/2021] [Accepted: 03/11/2021] [Indexed: 02/07/2023] Open
Abstract
Under aerobic conditions, mitochondrial oxidative phosphorylation (OXPHOS) converts the energy released by nutrient oxidation into ATP, the currency of living organisms. The whole biochemical machinery is hosted by the inner mitochondrial membrane (mtIM) where the protonmotive force built by respiratory complexes, dynamically assembled as super-complexes, allows the F1FO-ATP synthase to make ATP from ADP + Pi. Recently mitochondria emerged not only as cell powerhouses, but also as signaling hubs by way of reactive oxygen species (ROS) production. However, when ROS removal systems and/or OXPHOS constituents are defective, the physiological ROS generation can cause ROS imbalance and oxidative stress, which in turn damages cell components. Moreover, the morphology of mitochondria rules cell fate and the formation of the mitochondrial permeability transition pore in the mtIM, which, most likely with the F1FO-ATP synthase contribution, permeabilizes mitochondria and leads to cell death. As the multiple mitochondrial functions are mutually interconnected, changes in protein composition by mutations or in supercomplex assembly and/or in membrane structures often generate a dysfunctional cascade and lead to life-incompatible diseases or severe syndromes. The known structural/functional changes in mitochondrial proteins and structures, which impact mitochondrial bioenergetics because of an impaired or defective energy transduction system, here reviewed, constitute the main biochemical damage in a variety of genetic and age-related diseases.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy; (F.T.); (V.V.); (C.A.)
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy; (F.T.); (V.V.); (C.A.)
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy; (F.T.); (V.V.); (C.A.)
| | - Vittoria Ventrella
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy; (F.T.); (V.V.); (C.A.)
| | - Cristina Algieri
- Department of Veterinary Medical Sciences, Alma Mater Studiorum University of Bologna, 40064 Ozzano Emilia, Italy; (F.T.); (V.V.); (C.A.)
| | - Gaia Tioli
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy;
| | - Giorgio Lenaz
- Department of Biomedical and Neuromotor Sciences, Alma Mater Studiorum University of Bologna, 40138 Bologna, Italy;
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16
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Nesci S, Algieri C, Trombetti F, Ventrella V, Fabbri M, Pagliarani A. Sulfide affects the mitochondrial respiration, the Ca 2+-activated F 1F O-ATPase activity and the permeability transition pore but does not change the Mg 2+-activated F 1F O-ATPase activity in swine heart mitochondria. Pharmacol Res 2021; 166:105495. [PMID: 33600941 DOI: 10.1016/j.phrs.2021.105495] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 02/12/2021] [Accepted: 02/12/2021] [Indexed: 12/12/2022]
Abstract
In mammalian cells enzymatic and non-enzymatic pathways produce H2S, a gaseous transmitter which recently emerged as promising therapeutic agent and modulator of mitochondrial bioenergetics. To explore this topic, the H2S donor NaHS, at micromolar concentrations, was tested on swine heart mitochondria. NaHS did not affect the F1FO-ATPase activated by the natural cofactor Mg2, but, when Mg2+ was replaced by Ca2+, a slight 15% enzyme inhibition at 100 µM NaHS was shown. Conversely, both the NADH-O2 and succinate-O2 oxidoreductase activities were totally inhibited by 200 μM NaHS with IC50 values of 61.6 ± 4.1 and 16.5 ± 4.6 μM NaHS, respectively. Since the mitochondrial respiration was equally inhibited by NaHS at both first or second respiratory substrates sites, the H2S generation may prevent the electron transfer from complexes I and II to downhill respiratory chain complexes, probably because H2S competes with O2 in complex IV, thus reducing membrane potential as a consequence of the cytochrome c oxidase activity inhibition. The Complex IV blockage by H2S was consistent with the linear concentration-dependent NADH-O2 oxidoreductase inhibition and exponential succinate-O2 oxidoreductase inhibition by NaHS, whereas the coupling between substrate oxidation and phosphorylation was unaffected by NaHS. Even if H2S is known to cause sulfhydration of cysteine residues, thiol oxidizing (GSSG) or reducing (DTE) agents, did not affect the F1FO-ATPase activities and mitochondrial respiration, thus ruling out any involvement of post-translational modifications of thiols. The permeability transition pore, the lethal channel which forms when the F1FO-ATPase is stimulated by Ca2+, did not open in the presence of NaHS, which showed a similar effect to ruthenium red, thus suggesting a putative Ca2+ transport cycle inhibition.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy.
| | - Cristina Algieri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy
| | - Vittoria Ventrella
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy
| | - Micaela Fabbri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, Via Tolara di Sopra, 50, Ozzano Emilia, 40064 Bologna, Italy
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17
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Nesci S, Pagliarani A. Ca 2+ as cofactor of the mitochondrial H + -translocating F 1 F O -ATP(hydrol)ase. Proteins 2021; 89:477-482. [PMID: 33378096 DOI: 10.1002/prot.26040] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/03/2020] [Accepted: 12/27/2020] [Indexed: 01/05/2023]
Abstract
The mitochondrial F1 FO -ATPase in the presence of the natural cofactor Mg2+ acts as the enzyme of life by synthesizing ATP, but it can also hydrolyze ATP to pump H+ . Interestingly, Mg2+ can be replaced by Ca2+ , but only to sustain ATP hydrolysis and not ATP synthesis. When Ca2+ inserts in F1 , the torque generation built by the chemomechanical coupling between F1 and the rotating central stalk was reported as unable to drive the transmembrane H+ flux within FO . However, the failed H+ translocation is not consistent with the oligomycin-sensitivity of the Ca2+ -dependent F1 FO -ATP(hydrol)ase. New enzyme roles in mitochondrial energy transduction are suggested by recent advances. Accordingly, the structural F1 FO -ATPase distortion driven by ATP hydrolysis sustained by Ca2+ is consistent with the permeability transition pore signal propagation pathway. The Ca2+ -activated F1 FO -ATPase, by forming the pore, may contribute to dissipate the transmembrane H+ gradient created by the same enzyme complex.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Bologna, Italy
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18
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Nesci S, Pagliarani A. Incoming news on the F-type ATPase structure and functions in mammalian mitochondria. BBA ADVANCES 2021; 1:100001. [PMID: 37115635 PMCID: PMC10074935 DOI: 10.1016/j.bbadva.2020.100001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 01/28/2023] Open
Abstract
•Recent findings of cryo-EM structures of mammalian F1FO-ATPase.•The membrane-embedded domain of the F1FO-ATPase and the permeability transition pore.•The Ca2+-activated 1FO-ATPase role in the mPTP is consistent with recent cryo-EM findings.•The membrane-embedded FO participates in mPTP formation in mammalian mitochondria.•Conformational changes within FO modify the inner mitochondrial membrane shape.
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Sankova MV, Kytko OV, Meylanova RD, Vasil’ev YL, Nelipa MV. Possible prospects for using modern magnesium preparations for increasing stress resistance during COVID-19 pandemic. RESEARCH RESULTS IN PHARMACOLOGY 2020. [DOI: 10.3897/rrpharmacology.6.59407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: The relevance of the issue of increasing stress resistance is due to a significant deterioration in the mental health of the population caused by the special conditions of the disease control and prevention during the COVID-19 pandemic. Recently, the decisive role in the severity of clinico-physiological manifestations of maladjustment to stress is assigned to magnesium ions.
The aim of the work was to study the magnesium importance in the body coping mechanisms under stress for the pathogenetic substantiation of the magnesium correction in an unfavorable situation of disease control and prevention during the COVID-19 pandemic.
Materials and methods: The theoretical basis of this scientific and analytical review was an analysis of modern Russian and foreign literature data posted on the electronic portals MEDLINE, PubMed-NCBI, Scientific Electronic Library eLIBRARY.RU, Google Academy, and CyberLeninka.
Results and discussion: It was shown that the total magnesium level in the body plays the indicator role of the body functional reserves. Acute and chronic stresses significantly increase the magnesium consumption and cause a decrease in its body content. Magnesium deficiency is one of the main pathogenetic mechanisms of reducing stress resistance and adaptive body reserves. Arising during the COVID-19 pandemic, increased nervous and emotional tension, the lack of emotional comfort and balance can lead to the onset or deterioration of magnesium deficiency, which manifests itself in mental burnout and depletion of adaptive capacities. The inability to synthesize magnesium in the body necessitates including foodstuffs high in magnesium in the population diet during this period. The appointment of magnesium preparations is pathogenetically justified with moderate and severe magnesium deficiency. This therapy should take into account the major concomitant diseases, severity of magnesium deficiency, and a patient’s age.
Conclusion: magnesium correction, carried out during the COVID-19 pandemic, will contribute to increasing stress resistance, preventing mental diseases and improving the population’s life quality.
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Algieri C, Nesci S, Trombetti F, Fabbri M, Ventrella V, Pagliarani A. Mitochondrial F 1F O-ATPase and permeability transition pore response to sulfide in the midgut gland of Mytilus galloprovincialis. Biochimie 2020; 180:222-228. [PMID: 33212166 DOI: 10.1016/j.biochi.2020.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 12/16/2022]
Abstract
The molecular mechanisms which rule the formation and opening of the mitochondrial permeability transition pore (mPTP), the lethal mechanism which permeabilizes mitochondria to water and solutes and drives the cell to death, are still unclear and particularly little investigated in invertebrates. Since Ca2+ increase in mitochondria is accompanied by mPTP opening and the participation of the mitochondrial F1FO-ATPase in the mPTP is increasingly sustained, the substitution of the natural cofactor Mg2+ by Ca2+ in the F1FO-ATPase activation has been involved in the mPTP mechanism. In mussel midgut gland mitochondria the similar kinetic properties of the Mg2+- or Ca2+-dependent F1FO-ATPase activities, namely the same affinity for ATP and bi-site activation kinetics by the ATP substrate, in spite of the higher enzyme activity and coupling efficiency of the Mg2+-dependent F1FO-ATPase, suggest that both enzyme activities are involved in the bioenergetic machinery. Other than being a mitochondrial poison and environmental contaminant, sulfide at low concentrations acts as gaseous mediator and can induce post-translational modifications of proteins. The sulfide donor NaHS, at micromolar concentrations, does not alter the two F1FO-ATPase activities, but desensitizes the mPTP to Ca2+ input. Unexpectedly, NaHS, under the conditions tested, points out a chemical refractoriness of both F1FO-ATPase activities and a failed relationship between the Ca2+-dependent F1FO-ATPase and the mPTP in mussels. The findings suggest that mPTP role and regulation may be different in different taxa and that the F1FO-ATPase insensitivity to NaHS may allow mussels to cope with environmental sulfide.
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Affiliation(s)
- Cristina Algieri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy.
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Micaela Fabbri
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Vittoria Ventrella
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences (DIMEVET), University of Bologna, via Tolara di Sopra, 50, 40064, Ozzano Emilia, Bologna, Italy
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Algieri V, Algieri C, Maiuolo L, De Nino A, Pagliarani A, Tallarida MA, Trombetti F, Nesci S. 1,5-Disubstituted-1,2,3-triazoles as inhibitors of the mitochondrial Ca 2+ -activated F 1 F O -ATP(hydrol)ase and the permeability transition pore. Ann N Y Acad Sci 2020; 1485:43-55. [PMID: 32959908 DOI: 10.1111/nyas.14474] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 06/24/2020] [Accepted: 08/01/2020] [Indexed: 02/06/2023]
Abstract
The mitochondrial permeability transition pore (mPTP), a high-conductance channel triggered by a sudden Ca2+ concentration increase, is composed of the F1 FO -ATPase. Since mPTP opening leads to mitochondrial dysfunction, which is a feature of many diseases, a great pharmacological challenge is to find mPTP modulators. In our study, the effects of two 1,5-disubstituted 1,2,3-triazole derivatives, five-membered heterocycles with three nitrogen atoms in the ring and capable of forming secondary interactions with proteins, were investigated. Compounds 3a and 3b were selected among a wide range of structurally related compounds because of their chemical properties and effectiveness in preliminary studies. In swine heart mitochondria, both compounds inhibit Ca2+ -activated F1 FO -ATPase without affecting F-ATPase activity sustained by the natural cofactor Mg2+ . The inhibition is mutually exclusive, probably because of their shared enzyme site, and uncompetitive with respect to the ATP substrate, since they only bind to the enzyme-ATP complex. Both compounds show the same inhibition constant (K'i ), but compound 3a has a doubled inactivation rate constant compared with compound 3b. Moreover, both compounds desensitize mPTP opening without altering mitochondrial respiration. The results strengthen the link between Ca2+ -activated F1 FO -ATPase and mPTP and suggest that these inhibitors can be pharmacologically exploited to counteract mPTP-related diseases.
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Affiliation(s)
- Vincenzo Algieri
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza, Italy
| | - Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy
| | - Loredana Maiuolo
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza, Italy
| | - Antonio De Nino
- Department of Chemistry and Chemical Technologies, University of Calabria, Cosenza, Italy
| | - Alessandra Pagliarani
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy
| | | | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy
| | - Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, Italy
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22
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Li C, Tan Y, Wu J, Ma Q, Bai S, Xia Z, Wan X, Liang J. Resveratrol Improves Bnip3-Related Mitophagy and Attenuates High-Fat-Induced Endothelial Dysfunction. Front Cell Dev Biol 2020; 8:796. [PMID: 32923443 PMCID: PMC7457020 DOI: 10.3389/fcell.2020.00796] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 07/28/2020] [Indexed: 12/16/2022] Open
Abstract
Statin treatment reduces cardiovascular risk. However, individuals with well-controlled low-density lipoprotein (LDL) levels may remain at increased risk owing to persistent high triglycerides and low high-density lipoprotein cholesterol. Because resveratrol promotes glucose metabolism and mitigates cardiovascular disorders, we explored its mechanism of protective action on high-fat-induced endothelial dysfunction. Human umbilical venous endothelial cells were treated with oxidized LDL (ox-LDL) in vitro. Endothelial function, cell survival, proliferation, migration, and oxidative stress were analyzed through western blots, quantitative polymerase chain reaction, ELISA, and immunofluorescence. ox-LDL induced endothelial cell apoptosis, proliferation arrest, and mobilization inhibition, all of which resveratrol reduced. ox-LDL suppressed the activities of mitochondrial respiration complex I and III and reduced levels of intracellular antioxidative enzymes, resulting in reactive oxygen species overproduction and mitochondrial dysfunction. Resveratrol treatment upregulated Bnip3-related mitophagy and prevented ox-LDL-mediated mitochondrial respiration complexes inactivation, sustaining mitochondrial membrane potential and favoring endothelial cell survival. We found that resveratrol enhanced Bnip3 transcription through hypoxia-inducible factor 1 (HIF1) and 5' AMP-activated protein kinase (AMPK). Inhibition of AMPK and HIF1 abolished resveratrol-mediated protection of mitochondrial redox balance and endothelial viability. Together, these data demonstrate resveratrol reduces hyperlipemia-related endothelial damage by preserving mitochondrial homeostasis.
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Affiliation(s)
- Chen Li
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Ying Tan
- Department of Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiandi Wu
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Qinghui Ma
- Department of Oncology Hematology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Shuchang Bai
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Zhangqing Xia
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Xiaoliang Wan
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
| | - Jianqiu Liang
- Department of Cardiology, Foshan Hospital Affiliated with Southern Medical University (The Second People's Hospital of Foshan), Foshan, China
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Nesci S, Pagliarani A, Algieri C, Trombetti F. Mitochondrial F-type ATP synthase: multiple enzyme functions revealed by the membrane-embedded F O structure. Crit Rev Biochem Mol Biol 2020; 55:309-321. [PMID: 32580582 DOI: 10.1080/10409238.2020.1784084] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Of the two main sectors of the F-type ATP synthase, the membrane-intrinsic FO domain is the one which, during evolution, has undergone the highest structural variations and changes in subunit composition. The FO complexity in mitochondria is apparently related to additional enzyme functions that lack in bacterial and thylakoid complexes. Indeed, the F-type ATP synthase has the main bioenergetic role to synthesize ATP by exploiting the electrochemical gradient built by respiratory complexes. The FO membrane domain, essential in the enzyme machinery, also participates in the bioenergetic cost of synthesizing ATP and in the formation of the cristae, thus contributing to mitochondrial morphology. The recent enzyme involvement in a high-conductance channel, which forms in the inner mitochondrial membrane and promotes the mitochondrial permeability transition, highlights a new F-type ATP synthase role. Point mutations which cause amino acid substitutions in FO subunits produce mitochondrial dysfunctions and lead to severe pathologies. The FO variability in different species, pointed out by cryo-EM analysis, mirrors the multiple enzyme functions and opens a new scenario in mitochondrial biology.
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Affiliation(s)
- Salvatore Nesci
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | | | - Cristina Algieri
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
| | - Fabiana Trombetti
- Department of Veterinary Medical Sciences, University of Bologna, Bologna, Italy
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Phenylglyoxal inhibition of the mitochondrial F 1F O-ATPase activated by Mg 2+ or by Ca 2+ provides clues on the mitochondrial permeability transition pore. Arch Biochem Biophys 2020; 681:108258. [PMID: 31917961 DOI: 10.1016/j.abb.2020.108258] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/06/2019] [Accepted: 01/03/2020] [Indexed: 01/01/2023]
Abstract
Phenylglyoxal (PGO), known to cause post-translational modifications of Arg residues, was used to highlight the role of arginine residues of the F1FO-ATPase, which may be crucial to yield the mitochondrial permeability transition pore (mPTP). In swine heart mitochondria PGO inhibits ATP hydrolysis by the F1FO-ATPase either sustained by the natural cofactor Mg2+ or by Ca2+ by a similar uncompetitive inhibition mechanism, namely the tertiary complex (ESI) only forms when the ATP substrate is already bound to the enzyme, and with similar strength, as shown by the similar K'i values (0.82 ± 0.07 mM in presence of Mg2+ and 0.64 ± 0.05 mM in the presence of Ca2+). Multiple inhibitor analysis indicates that features of the F1 catalytic sites and/or the FO proton binding sites are apparently unaffected by PGO. However, PGO and F1 or FO inhibitors can bind the enzyme combine simultaneously. However they mutually hinder to bind the Mg2+-activated F1FO-ATPase, whereas they do not mutually exclude to bind the Ca2+-activated F1FO-ATPase. The putative formation of PGO-arginine adducts, and the consequent spatial rearrangement in the enzyme structure, inhibits the F1FO-ATPase activity but, as shown by the calcium retention capacity evaluation in intact mitochondria, apparently favours the mPTP formation.
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