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Luchetta A, Taliercio C, Cruz N, Martini G, Manduchi G, Rigoni A, Trevisan L, Paolucci F, Labate C, Breda M, Capobianco R, Moressa M, Molon F, Sartore A, Simionato P, Zampiva E, Barbato P, Carraro M, Migliorato L. As built design of the control systems of the ITER full-size beam source SPIDER in the neutral beam test facility - A critical review. Fusion Engineering and Design 2023. [DOI: 10.1016/j.fusengdes.2023.113624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Frigo E, Tommasin L, Lippe G, Carraro M, Bernardi P. The Haves and Have-Nots: The Mitochondrial Permeability Transition Pore across Species. Cells 2023; 12:1409. [PMID: 37408243 PMCID: PMC10216546 DOI: 10.3390/cells12101409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 07/07/2023] Open
Abstract
The demonstration that F1FO (F)-ATP synthase and adenine nucleotide translocase (ANT) can form Ca2+-activated, high-conductance channels in the inner membrane of mitochondria from a variety of eukaryotes led to renewed interest in the permeability transition (PT), a permeability increase mediated by the PT pore (PTP). The PT is a Ca2+-dependent permeability increase in the inner mitochondrial membrane whose function and underlying molecular mechanisms have challenged scientists for the last 70 years. Although most of our knowledge about the PTP comes from studies in mammals, recent data obtained in other species highlighted substantial differences that could be perhaps attributed to specific features of F-ATP synthase and/or ANT. Strikingly, the anoxia and salt-tolerant brine shrimp Artemia franciscana does not undergo a PT in spite of its ability to take up and store Ca2+ in mitochondria, and the anoxia-resistant Drosophila melanogaster displays a low-conductance, selective Ca2+-induced Ca2+ release channel rather than a PTP. In mammals, the PT provides a mechanism for the release of cytochrome c and other proapoptotic proteins and mediates various forms of cell death. In this review, we cover the features of the PT (or lack thereof) in mammals, yeast, Drosophila melanogaster, Artemia franciscana and Caenorhabditis elegans, and we discuss the presence of the intrinsic pathway of apoptosis and of other forms of cell death. We hope that this exercise may help elucidate the function(s) of the PT and its possible role in evolution and inspire further tests to define its molecular nature.
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Affiliation(s)
- Elena Frigo
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Via Ugo Bassi 58/B, I-35131 Padova, Italy; (E.F.); (L.T.); (M.C.)
| | - Ludovica Tommasin
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Via Ugo Bassi 58/B, I-35131 Padova, Italy; (E.F.); (L.T.); (M.C.)
| | - Giovanna Lippe
- Department of Medicine, University of Udine, Piazzale Kolbe 4, I-33100 Udine, Italy;
| | - Michela Carraro
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Via Ugo Bassi 58/B, I-35131 Padova, Italy; (E.F.); (L.T.); (M.C.)
| | - Paolo Bernardi
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Via Ugo Bassi 58/B, I-35131 Padova, Italy; (E.F.); (L.T.); (M.C.)
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Carraro M, Bernardi P. The mitochondrial permeability transition pore in Ca 2+ homeostasis. Cell Calcium 2023; 111:102719. [PMID: 36963206 DOI: 10.1016/j.ceca.2023.102719] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/26/2023]
Abstract
The mitochondrial Permeability Transition Pore (PTP) can be defined as a Ca2+ activated mega-channel involved in mitochondrial damage and cell death, making its inhibition a hallmark for therapeutic purposes in many PTP-related paradigms. Although long-lasting PTP openings have been widely studied, the physiological implications of transient openings (also called "flickering" behavior) are still poorly understood. The flickering activity was suggested to play a role in the regulation of Ca2+ and ROS homeostasis, and yet this hypothesis did not reach general consensus. This state of affairs might arise from the lack of unquestionable experimental evidence, due to limitations of the available techniques for capturing transient PTP activity and to a still partial understanding of its molecular identity. In this review we will focus on possible implications of the PTP in physiology, in particular its role as a Ca2+ release pathway, discussing the consequences of its forced inhibition. We will also consider the recent hypothesis of the existence of more permeability pathways and their potential involvement in mitochondrial physiology.
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Affiliation(s)
- Michela Carraro
- Department of Biomedical Sciences, University of Padova and CNR Neuroscience Institute, Via Ugo Bassi 58/B, I-35131 Padova, Italy.
| | - Paolo Bernardi
- Department of Biomedical Sciences, University of Padova and CNR Neuroscience Institute, Via Ugo Bassi 58/B, I-35131 Padova, Italy
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Galeazzo A, Miandar T, Carraro M. SDGs in corporate responsibility reporting: a longitudinal investigation of institutional determinants and financial performance. J Manag Gov 2023. [PMCID: PMC9997439 DOI: 10.1007/s10997-023-09671-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Companies play a central role in the achievement of Sustainable Development Goals (SDGs); as such, they face institutional pressures to increase their engagement with SDGs. However, given the complexity of SDGs, it is unclear whether these pressures lead firms to adopt engagement approaches that address a few goals or the whole set of 17, and if that choice has any subsequent effect on financial performance. To shed light on these issues, this research draws on the neo-institutional theory to investigate whether two institutional determinants—industry type and country of origin—affect SDG engagement and whether such engagement improves financial performance. Based on a content analysis and a regression analysis on high-reputation companies (the 100 most sustainable firms in the world) over the period 2017–2020, we find that the institutional pressures associated with industry type and country-of-origin positively impact any engagement approach to SDGs. However, we establish that companies’ financial performance only generally improves when engaging with either the whole set of SDGs or a specific subset of the most frequently cited. This study provides important theoretical and practical contributions that illuminate firms’ institutional and financial rationales for adopting SDGs.
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Affiliation(s)
- Ambra Galeazzo
- Dipartimento di Scienze Economiche e Aziendali “Marco Fanno”, Università degli Studi di Padova, Via del Santo 33, Padova, Italy
| | - Toloue Miandar
- Dipartimento di Scienze Aziendali - DISA, Alma Mater Studiorum Università di Bologna, Bologna, Italy
| | - Michela Carraro
- Dipartimento di Scienze Economiche e Aziendali “Marco Fanno”, Università degli Studi di Padova, Via del Santo 33, Padova, Italy
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Bernardi P, Carraro M, Lippe G. The mitochondrial permeability transition: Recent progress and open questions. FEBS J 2022; 289:7051-7074. [PMID: 34710270 PMCID: PMC9787756 DOI: 10.1111/febs.16254] [Citation(s) in RCA: 62] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 10/27/2021] [Indexed: 01/13/2023]
Abstract
Major progress has been made in defining the basis of the mitochondrial permeability transition, a Ca2+ -dependent permeability increase of the inner membrane that has puzzled mitochondrial research for almost 70 years. Initially considered an artefact of limited biological interest by most, over the years the permeability transition has raised to the status of regulator of mitochondrial ion homeostasis and of druggable effector mechanism of cell death. The permeability transition is mediated by opening of channel(s) modulated by matrix cyclophilin D, the permeability transition pore(s) (PTP). The field has received new impulse (a) from the hypothesis that the PTP may originate from a Ca2+ -dependent conformational change of F-ATP synthase and (b) from the reevaluation of the long-standing hypothesis that it originates from the adenine nucleotide translocator (ANT). Here, we provide a synthetic account of the structure of ANT and F-ATP synthase to discuss potential and controversial mechanisms through which they may form high-conductance channels; and review some intriguing findings from the wealth of early studies of PTP modulation that still await an explanation. We hope that this review will stimulate new experiments addressing the many outstanding problems, and thus contribute to the eventual solution of the puzzle of the permeability transition.
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Affiliation(s)
- Paolo Bernardi
- Department of Biomedical Sciences and CNR Neuroscience InstituteUniversity of PadovaItaly
| | - Michela Carraro
- Department of Biomedical Sciences and CNR Neuroscience InstituteUniversity of PadovaItaly
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Azzena U, Carraro M, Pisano L, Pintus E, Pintus S, Polese R, Satta P, Gaspa S, De Luca L, Taras A, Garroni S. Size Selectivity in the Hydroxylation of Esters of Unsaturated Fatty Acids. EUR J LIPID SCI TECH 2022. [DOI: 10.1002/ejlt.202100234] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- U. Azzena
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - M. Carraro
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
- Consorzio Interuniversitario Reattività Chimica e Catalisi (CIRCC) via Ulpiani 27, I‐70126 Bari Italy
| | - L. Pisano
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - E. Pintus
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - S. Pintus
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - R. Polese
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - P. Satta
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - S. Gaspa
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - L. De Luca
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - A. Taras
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
| | - S. Garroni
- Dipartimento di Chimica e Farmacia Università degli Studi di Sassari via Vienna 2, I‐07100 Sassari Italy
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Carrer A, Laquatra C, Tommasin L, Carraro M. Modulation and Pharmacology of the Mitochondrial Permeability Transition: A Journey from F-ATP Synthase to ANT. Molecules 2021; 26:molecules26216463. [PMID: 34770872 PMCID: PMC8587538 DOI: 10.3390/molecules26216463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/21/2021] [Accepted: 10/23/2021] [Indexed: 12/22/2022] Open
Abstract
The permeability transition (PT) is an increased permeation of the inner mitochondrial membrane due to the opening of the PT pore (PTP), a Ca2+-activated high conductance channel involved in Ca2+ homeostasis and cell death. Alterations of the PTP have been associated with many pathological conditions and its targeting represents an incessant challenge in the field. Although the modulation of the PTP has been extensively explored, the lack of a clear picture of its molecular nature increases the degree of complexity for any target-based approach. Recent advances suggest the existence of at least two mitochondrial permeability pathways mediated by the F-ATP synthase and the ANT, although the exact molecular mechanism leading to channel formation remains elusive for both. A full comprehension of this to-pore conversion will help to assist in drug design and to develop pharmacological treatments for a fine-tuned PT regulation. Here, we will focus on regulatory mechanisms that impinge on the PTP and discuss the relevant literature of PTP targeting compounds with particular attention to F-ATP synthase and ANT.
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Carrer A, Tommasin L, Šileikytė J, Ciscato F, Filadi R, Urbani A, Forte M, Rasola A, Szabò I, Carraro M, Bernardi P. Defining the molecular mechanisms of the mitochondrial permeability transition through genetic manipulation of F-ATP synthase. Nat Commun 2021; 12:4835. [PMID: 34376679 PMCID: PMC8355262 DOI: 10.1038/s41467-021-25161-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 07/26/2021] [Indexed: 12/13/2022] Open
Abstract
F-ATP synthase is a leading candidate as the mitochondrial permeability transition pore (PTP) but the mechanism(s) leading to channel formation remain undefined. Here, to shed light on the structural requirements for PTP formation, we test cells ablated for g, OSCP and b subunits, and ρ0 cells lacking subunits a and A6L. Δg cells (that also lack subunit e) do not show PTP channel opening in intact cells or patch-clamped mitoplasts unless atractylate is added. Δb and ΔOSCP cells display currents insensitive to cyclosporin A but inhibited by bongkrekate, suggesting that the adenine nucleotide translocator (ANT) can contribute to channel formation in the absence of an assembled F-ATP synthase. Mitoplasts from ρ0 mitochondria display PTP currents indistinguishable from their wild-type counterparts. In this work, we show that peripheral stalk subunits are essential to turn the F-ATP synthase into the PTP and that the ANT provides mitochondria with a distinct permeability pathway.
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Affiliation(s)
- Andrea Carrer
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Ludovica Tommasin
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Justina Šileikytė
- Vollum Institute, Oregon Health and Science University, Portland, OR, USA
| | - Francesco Ciscato
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Riccardo Filadi
- Department of Biomedical Sciences, University of Padova, Padova, Italy.,Consiglio Nazionale delle Ricerche Neuroscience Institute, Padova, Italy
| | - Andrea Urbani
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Michael Forte
- Vollum Institute, Oregon Health and Science University, Portland, OR, USA
| | - Andrea Rasola
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Ildikò Szabò
- Consiglio Nazionale delle Ricerche Neuroscience Institute, Padova, Italy.,Department of Biology, University of Padova, Padova, Italy
| | - Michela Carraro
- Department of Biomedical Sciences, University of Padova, Padova, Italy.
| | - Paolo Bernardi
- Department of Biomedical Sciences, University of Padova, Padova, Italy. .,Consiglio Nazionale delle Ricerche Neuroscience Institute, Padova, Italy.
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Bessi V, Giacomucci G, Mazzeo S, Bagnoli S, Padiglioni S, Balestrini J, Tomaiuolo G, Piaceri I, Carraro M, Bracco L, Sorbi S, Nacmias B. PER2 C111G polymorphism, cognitive reserve and cognition in subjective cognitive decline and mild cognitive impairment: a 10-year follow-up study. Eur J Neurol 2020; 28:56-65. [PMID: 32896064 DOI: 10.1111/ene.14518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 08/31/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND AND PURPOSE CLOCK and PER2 genes have been implicated in sleep-wake cycle alterations and neurodegenerative diseases. Our aim was to evaluate the effect of CLOCK T3111C and PER2 C111G on cognitive functioning in subjective cognitive decline (SCD) patients and mild cognitive impairment (MCI) patients at the baseline of a longitudinal study, and the effect of these two polymorphisms on the progression to Alzheimer's disease (AD) of the two groups. METHODS Sixty-eight subjects (41 SCD and 27 MCI) who underwent clinical evaluation, neuropsychological assessment, CLOCK and PER2 genotyping at baseline and neuropsychological follow-up every 2 years for a mean time of 10 years were included. Subjects who developed AD (SCD-c and MCI-c) and non-converters (SCD-nc, MCI-nc) were considered. RESULTS CLOCK T3111C was detected in 47% of cases (21 SCD, 11 MCI) and PER2 C111G in 19% of cases (eight SCD and five MCI). PER2 G carriers presented lower premorbid intelligence score (P = 0.049), fewer years of education (P = 0.007) and a lower frequency of family history of AD (P = 0.04) than G non-carriers. MCI PER2 G carriers had worse performance in tests assessing memory, executive function, language and visuospatial abilities at baseline. During follow-up, two SCD and 15 MCI subjects progressed to AD: both of the SCD-c subjects presented the PER2 G allele, while none of the SCD PER2 G non-carriers converted to AD (P = 0.003). CONCLUSION PER2 seems to have a role in cognitive reserve and cognition in SCD and MCI patients. Nevertheless, further studies are needed to assess the role of PER2 C111G on the risk of progression to AD.
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Affiliation(s)
- V Bessi
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - G Giacomucci
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - S Mazzeo
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - S Bagnoli
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - S Padiglioni
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - J Balestrini
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | | | - I Piaceri
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - M Carraro
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - L Bracco
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - S Sorbi
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy.,IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
| | - B Nacmias
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy.,IRCCS Fondazione Don Carlo Gnocchi, Florence, Italy
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Sambri I, Massa F, Gullo F, Meneghini S, Cassina L, Carraro M, Dina G, Quattrini A, Patanella L, Carissimo A, Iuliano A, Santorelli F, Codazzi F, Grohovaz F, Bernardi P, Becchetti A, Casari G. Impaired flickering of the permeability transition pore causes SPG7 spastic paraplegia. EBioMedicine 2020; 61:103050. [PMID: 33045469 PMCID: PMC7553352 DOI: 10.1016/j.ebiom.2020.103050] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 09/14/2020] [Accepted: 09/22/2020] [Indexed: 02/07/2023] Open
Abstract
Background Mutations of the mitochondrial protein paraplegin cause hereditary spastic paraplegia type 7 (SPG7), a so-far untreatable degenerative disease of the upper motoneuron with still undefined pathomechanism. The intermittent mitochondrial permeability transition pore (mPTP) opening, called flickering, is an essential process that operates to maintain mitochondrial homeostasis by reducing intra-matrix Ca2+ and reactive oxygen species (ROS) concentration, and is critical for efficient synaptic function. Methods We use a fluorescence-based approach to measure mPTP flickering in living cells and biochemical and molecular biology techniques to dissect the pathogenic mechanism of SPG7. In the SPG7 animal model we evaluate the potential improvement of the motor defect, neuroinflammation and neurodegeneration by means of an mPTP inducer, the benzodiazepine Bz-423. Findings We demonstrate that paraplegin is required for efficient transient opening of the mPTP, that is impaired in both SPG7 patients-derived fibroblasts and primary neurons from Spg7−/− mice. We show that dysregulation of mPTP opening at the pre-synaptic terminal impairs neurotransmitter release leading to ineffective synaptic transmission. Lack of paraplegin impairs mPTP flickering by a mechanism involving increased expression and activity of sirtuin3, which promotes deacetylation of cyclophilin D, thus hampering mPTP opening. Pharmacological treatment with Bz-423, which bypasses the activity of CypD, normalizes synaptic transmission and rescues the motor impairment of the SPG7 mouse model. Interpretation mPTP targeting opens a new avenue for the potential therapy of this form of spastic paraplegia. Funding Telethon Foundation grant (TGMGCSBX16TT); Dept. of Defense, US Army, grant W81XWH-18–1–0001
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Affiliation(s)
- Irene Sambri
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy
| | - Filomena Massa
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy
| | | | | | | | | | | | | | - Lorenzo Patanella
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy
| | - Annamaria Carissimo
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy; Institute for Applied Mathematics 'Mauro Picone', National Research Council, Naples, Italy
| | - Antonella Iuliano
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy
| | | | | | | | | | | | - Giorgio Casari
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli-Naples, Italy; Vita-Salute San Raffaele University, Milan, Italy.
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Carraro M, Jones K, Sartori G, Schiavone M, Antonucci S, Kucharczyk R, di Rago JP, Franchin C, Arrigoni G, Forte M, Bernardi P. The Unique Cysteine of F-ATP Synthase OSCP Subunit Participates in Modulation of the Permeability Transition Pore. Cell Rep 2020; 32:108095. [DOI: 10.1016/j.celrep.2020.108095] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/13/2020] [Accepted: 08/10/2020] [Indexed: 12/31/2022] Open
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Carraro M, Carrer A, Urbani A, Bernardi P. Molecular nature and regulation of the mitochondrial permeability transition pore(s), drug target(s) in cardioprotection. J Mol Cell Cardiol 2020; 144:76-86. [DOI: 10.1016/j.yjmcc.2020.05.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/28/2020] [Accepted: 05/20/2020] [Indexed: 12/12/2022]
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Mazzeo S, Padiglioni S, Bagnoli S, Carraro M, Piaceri I, Bracco L, Nacmias B, Sorbi S, Bessi V. Assessing the effectiveness of subjective cognitive decline plus criteria in predicting the progression to Alzheimer’s disease: an 11‐year follow‐up study. Eur J Neurol 2020; 27:894-899. [DOI: 10.1111/ene.14167] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 02/06/2020] [Indexed: 12/18/2022]
Affiliation(s)
- S. Mazzeo
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - S. Padiglioni
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - S. Bagnoli
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - M. Carraro
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - I. Piaceri
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - L. Bracco
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - B. Nacmias
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
| | - S. Sorbi
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
- IRCCS Fondazione Don Carlo Gnocchi Florence Italy
| | - V. Bessi
- Department of Neuroscience Psychology Drug Research and Child Health University of FlorenceAzienda Ospedaliera‐Universitaria Careggi Florence Italy
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Antonucci S, Sileikyte J, Di Sante M, Carraro M, Menabò R, Bauer T, Deveraux J, Cohen M, Forte MA, Murphy E, Bernardi P, Alanova P, Di Lisa F. Novel PTP inhibitors with potent cardioprotective efficacy. J Mol Cell Cardiol 2020. [DOI: 10.1016/j.yjmcc.2019.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Crosetti E, Bertolin A, Molteni G, Bertotto I, Balmativola D, Carraro M, Sprio AE, Berta GN, Presutti L, Rizzotto G, Succo G. Patterns of recurrence after open partial horizontal laryngectomy types II and III: univariate and logistic regression analysis of risk factors. ACTA ACUST UNITED AC 2020; 39:235-243. [PMID: 31501615 PMCID: PMC6734199 DOI: 10.14639/0392-100x-2409] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 01/11/2019] [Indexed: 11/23/2022]
Abstract
In choosing the best surgical treatment (total or partial laryngectomy) for patients affected by laryngeal squamous cell carcinoma (SCC), it is still necessary to identify a link between prognostic factors and oncological outcomes. A retrospective analysis of clinical outcomes of 819 patients affected by laryngeal cancer who underwent OPHL type II and III between 1995 to 2014 was carried out. Focusing on recurrence and its site (local, regional or distant), our cohort has been divided in two groups: patients showing recurrence (n = 108) vs those without recurrence (n = 711). Thirteen clinical-pathological parameters have been studied by univariate and multivariate analysis to identify possible correlations between recurrence and oncological outcomes (overall survival (OS), disease free survival (DFS), disease specific survival (DSS), laryngectomy free survival (LSF), laryngectomy free freedom (FFL). In multivariate analysis, we found 4 negative prognostic factors for recurrence: site of tumour (> supraglottic), cartilage invasion (> if present), perineural invasion (> if present) and type of OPHL (> in OPHL type III). The knowledge and detection of negative prognostic factors for the risk of recurrence (pN classification, cartilage involvement, perineural invasion, and thus the type of surgical treatment adopted) could increase the already well-established potentiality of OPHLs in treating cases with a safe indication after careful discussion in the tumour board.
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Affiliation(s)
- E Crosetti
- Head and Neck Oncology Service, Candiolo Cancer Institute - FPO IRCCS, Candiolo (TO), Italy
| | - A Bertolin
- Otolaryngology Service, Vittorio Veneto Hospital, Vittorio Veneto (TV) Italy
| | - G Molteni
- Department of Otolaryngology-Head and Neck Surgery, University Hospital of Verona, Italy
| | - I Bertotto
- Radiology Service, Candiolo Cancer Institute - FPO IRCCS, Candiolo (TO), Italy
| | - D Balmativola
- Pathology Service, Candiolo Cancer Institute - FPO IRCCS, Candiolo (TO), Italy
| | - M Carraro
- Head and Neck Oncology Service, Candiolo Cancer Institute - FPO IRCCS, Candiolo (TO), Italy
| | - A E Sprio
- Department of Clinical and Biological Sciences, University of Turin, Italy
| | - G N Berta
- Department of Clinical and Biological Sciences, University of Turin, Italy
| | - L Presutti
- Otolaryngology Service, Head and Neck Dept., Policlinico Hospital, University of Modena, Italy
| | - G Rizzotto
- Otolaryngology Service, Vittorio Veneto Hospital, Vittorio Veneto (TV) Italy
| | - G Succo
- Head and Neck Oncology Service, Candiolo Cancer Institute - FPO IRCCS, Candiolo (TO), Italy.,Oncology Dept. University of Turin, Italy
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16
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Abstract
The mitochondrial permeability transition (PT) is an increase in the inner membrane permeability caused by the opening of a Ca2+-activated high-conductance channel, the so-called PT pore (PTP) or mitochondrial megachannel (MMC). Recent data indicate that F-ATP synthase contributes substantially to the generation of the PTP, yet this hypothesis is the matter of controversy. In this chapter, we will describe an approach to study the pore, i.e., the evaluation of mitochondrial swelling by means of a decrease in the absorbance at 540nm. This method should be useful to resolve apparent discrepancies in the literature and help solve emerging issues on the identity of mitochondrial pores.
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Affiliation(s)
- Michela Carraro
- Department of Biomedical Sciences, University of Padova, Padova, Italy.
| | - Paolo Bernardi
- Department of Biomedical Sciences, University of Padova, Padova, Italy.
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17
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Antonucci S, Di Sante M, Sileikyte J, Deveraux J, Bauer T, Bround MJ, Menabò R, Paillard M, Alanova P, Carraro M, Ovize M, Molkentin JD, Cohen M, Forte MA, Bernardi P, Di Lisa F, Murphy E. A novel class of cardioprotective small-molecule PTP inhibitors. Pharmacol Res 2019; 151:104548. [PMID: 31759087 DOI: 10.1016/j.phrs.2019.104548] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/12/2019] [Accepted: 11/14/2019] [Indexed: 01/03/2023]
Abstract
Ischemia/reperfusion (I/R) injury is mediated in large part by opening of the mitochondrial permeability transition pore (PTP). Consequently, inhibitors of the PTP hold great promise for the treatment of a variety of cardiovascular disorders. At present, PTP inhibition is obtained only through the use of drugs (e.g. cyclosporine A, CsA) targeting cyclophilin D (CyPD) which is a key modulator, but not a structural component of the PTP. This limitation might explain controversial findings in clinical studies. Therefore, we investigated the protective effects against I/R injury of small-molecule inhibitors of the PTP (63 and TR002) that do not target CyPD. Both compounds exhibited a dose-dependent inhibition of PTP opening in isolated mitochondria and were more potent than CsA. Notably, PTP inhibition was observed also in mitochondria devoid of CyPD. Compounds 63 and TR002 prevented PTP opening and mitochondrial depolarization induced by Ca2+ overload and by reactive oxygen species in neonatal rat ventricular myocytes (NRVMs). Remarkably, both compounds prevented cell death, contractile dysfunction and sarcomeric derangement induced by anoxia/reoxygenation injury in NRVMs at sub-micromolar concentrations, and were more potent than CsA. Cardioprotection was observed also in adult mouse ventricular myocytes and human iPSc-derived cardiomyocytes, as well as ex vivo in perfused hearts. Thus, this study demonstrates that 63 and TR002 represent novel cardioprotective agents that inhibit PTP opening independent of CyPD targeting.
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Affiliation(s)
| | - Moises Di Sante
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Justina Sileikyte
- Vollum Institute, and Department of Physiology and Pharmacology, Portland, OR, USA
| | - Jordan Deveraux
- Vollum Institute, and Department of Physiology and Pharmacology, Portland, OR, USA
| | - Tyler Bauer
- Systems Biology Center, NHLBI, NIH, Bethesda, MD, USA
| | - Michael J Bround
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA
| | - Roberta Menabò
- Department of Biomedical Sciences, University of Padova, Padova, Italy; National Research Council of Italy (CNR), Padova, Italy
| | - Melanie Paillard
- CarMeN Laboratory, University Claude Bernard Lyon 1, INSA Lyon, Oullins, France
| | - Petra Alanova
- Department of Biomedical Sciences, University of Padova, Padova, Italy; Department of Developmental Cardiology, Institute of Physiology CAS, Prague, Czech Republic
| | - Michela Carraro
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Michel Ovize
- CarMeN Laboratory, University Claude Bernard Lyon 1, INSA Lyon, Oullins, France
| | - Jeffery D Molkentin
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, OH, USA; Howard Hughes Medical Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Michael Cohen
- Vollum Institute, and Department of Physiology and Pharmacology, Portland, OR, USA
| | - Michael A Forte
- Vollum Institute, and Department of Physiology and Pharmacology, Portland, OR, USA
| | - Paolo Bernardi
- Department of Biomedical Sciences, University of Padova, Padova, Italy; National Research Council of Italy (CNR), Padova, Italy
| | - Fabio Di Lisa
- Department of Biomedical Sciences, University of Padova, Padova, Italy; National Research Council of Italy (CNR), Padova, Italy.
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18
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Zanon F, Marcantoni L, Pastore G, Baracca E, Picariello C, Lanza D, Maddalozzo A, Giatti S, Carraro M, Roncon L, Barbetta A, Di Gregorio F. P6547The energy cost of His bundle pacing can be curtailed. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.1137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
His bundle pacing (HBP) allows physiological ventricular activation and prevents the electrical and mechanical desynchronization generally induced by myocardial stimulation, which can increase the risk of atrial fibrillation and heart failure. On the other hand, reliable HBP capture often requires higher energy than conventional myocardial pacing. This reduces the expected life of the stimulator and might limit the diffusion of HBP in the clinical practice.
Purpose
Decreasing HBP current drain by careful management of stimulation safety margin and pulse duration.
Methods
In 28 patients undergoing DDD pacing with HBP, a third lead was implanted in RV apex to provide back-up pacing on demand. HBP and apical leads were connected, respectively, to the V1 and V2 channels of a 3-chamber stimulator. When HBP was effective, apical sensing occurred within the VV delay and prevented V2 stimulation. In contrast, in case of HBP failure, V2 sensing was missing and apical back-up pacing was promptly delivered at the end of the VV delay. The availability of a back-up pulse on demand allowed reducing the HBP safety margin with no risk. Furthermore, the individual HBP strength-duration curve was derived in the aim of optimizing the Hisian pulse parameters, which are the major determinants of the device current drain.
Results
Correct back-up inhibition by successful HBP and stimulation in the event of capture loss was achieved in all the patients. The latency from Hisian pacing to apical sensing averaged 96±14 ms. According to the pacemaker counters, no back-up pulse was delivered in daily life in 59% of patients. In the remaining, the prevalence of back-up stimulation never exceeded 15% of paced ventricular cycles. The high HBP threshold was essentially due to an increased rheobase (1.2±0.6 V), while the chronaxie ranged from 0.30 to 0.53 ms in 71% of patients (median 0.44 ms), exceeding 0.6 ms only in 29% of the cases. An average current saving of 5.4±3.0 μA was obtained at the expense of a mild reduction in HBP safety margin (from 1.6±0.2 to 1.4±0.1 times).
HBP and apical back-up
Conclusions
Back-up stimulation on demand is a reliable option to decrease HBP current drain and prolong the stimulator service life with full safety. In most of the cases, significant saving can be achieved by pulse shortening, as the chronaxie time is in the same range as with myocardial stimulation and longer pulses are not required. A pulse duration exceeding 0.6 ms is indicated in less than 1/3 of the implants.
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Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | | | | | | | - A Barbetta
- Medico SPA, Clinical Research Unit, Rubano, PD, Italy
| | - F Di Gregorio
- Medico SPA, Clinical Research Unit, Rubano, PD, Italy
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19
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Carraro M, Checchetto V, Szabó I, Bernardi P. F‐ATPsynthase and the permeability transition pore: fewer doubts, more certainties. FEBS Lett 2019; 593:1542-1553. [DOI: 10.1002/1873-3468.13485] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2019] [Revised: 06/09/2019] [Accepted: 06/10/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Michela Carraro
- Department of Biomedical Sciences University of Padova Italy
| | | | - Ildikó Szabó
- Department of Biology University of Padova Italy
| | - Paolo Bernardi
- Department of Biomedical Sciences University of Padova Italy
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20
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Guo L, Carraro M, Carrer A, Minervini G, Urbani A, Masgras I, Tosatto SCE, Szabò I, Bernardi P, Lippe G. Arg-8 of yeast subunit e contributes to the stability of F-ATP synthase dimers and to the generation of the full-conductance mitochondrial megachannel. J Biol Chem 2019; 294:10987-10997. [PMID: 31160339 DOI: 10.1074/jbc.ra119.008775] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 05/29/2019] [Indexed: 01/08/2023] Open
Abstract
The mitochondrial F-ATP synthase is a complex molecular motor arranged in V-shaped dimers that is responsible for most cellular ATP synthesis in aerobic conditions. In the yeast F-ATP synthase, subunits e and g of the FO sector constitute a lateral domain, which is required for dimer stability and cristae formation. Here, by using site-directed mutagenesis, we identified Arg-8 of subunit e as a critical residue in mediating interactions between subunits e and g, most likely through an interaction with Glu-83 of subunit g. Consistent with this hypothesis, (i) the substitution of Arg-8 in subunit e (eArg-8) with Ala or Glu or of Glu-83 in subunit g (gGlu-83) with Ala or Lys destabilized the digitonin-extracted F-ATP synthase, resulting in decreased dimer formation as revealed by blue-native electrophoresis; and (ii) simultaneous substitution of eArg-8 with Glu and of gGlu-83 with Lys rescued digitonin-stable F-ATP synthase dimers. When tested in lipid bilayers for generation of Ca2+-dependent channels, WT dimers displayed the high-conductance channel activity expected for the mitochondrial megachannel/permeability transition pore, whereas dimers obtained at low digitonin concentrations from the Arg-8 variants displayed currents of strikingly small conductance. Remarkably, double replacement of eArg-8 with Glu and of gGlu-83 with Lys restored high-conductance channels indistinguishable from those seen in WT enzymes. These findings suggest that the interaction of subunit e with subunit g is important for generation of the full-conductance megachannel from F-ATP synthase.
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Affiliation(s)
- Lishu Guo
- Departments of Biomedical Sciences and
| | | | | | | | | | | | - Silvio C E Tosatto
- Departments of Biomedical Sciences and; Consiglio Nazionale delle Ricerche Institute of Neuroscience, 35131 Padova, Italy, and
| | - Ildikò Szabò
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, 35131 Padova, Italy, and; Biology, University of Padova, 35131 Padova, Italy
| | - Paolo Bernardi
- Departments of Biomedical Sciences and; Consiglio Nazionale delle Ricerche Institute of Neuroscience, 35131 Padova, Italy, and.
| | - Giovanna Lippe
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, 33100 Udine, Italy.
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21
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Carraro M, Checchetto V, Sartori G, Kucharczyk R, di Rago JP, Minervini G, Franchin C, Arrigoni G, Giorgio V, Petronilli V, Tosatto S, Lippe G, Szabó I, Bernardi P. High-Conductance Channel Formation in Yeast Mitochondria is Mediated by F-ATP Synthase e and g Subunits. Cell Physiol Biochem 2018; 50:1840-1855. [DOI: 10.1159/000494864] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/26/2018] [Indexed: 11/19/2022] Open
Abstract
Background/Aims: The permeability transition pore (PTP) is an unselective, Ca2+-dependent high conductance channel of the inner mitochondrial membrane whose molecular identity has long remained a mystery. The most recent hypothesis is that pore formation involves the F-ATP synthase, which consistently generates Ca2+-activated channels. Available structures do not display obvious features that can accommodate a channel; thus, how the pore can form and whether its activity can be entirely assigned to F-ATP synthase is the matter of debate. In this study, we investigated the role of F-ATP synthase subunits e, g and b in PTP formation. Methods: Yeast null mutants for e, g and the first transmembrane (TM) α-helix of subunit b were generated and evaluated for mitochondrial morphology (electron microscopy), membrane potential (Rhodamine123 fluorescence) and respiration (Clark electrode). Homoplasmic C23S mutant of subunit a was generated by in vitro mutagenesis followed by biolistic transformation. F-ATP synthase assembly was evaluated by BN-PAGE analysis. Cu2+ treatment was used to induce the formation of F-ATP synthase dimers in the absence of e and g subunits. The electrophysiological properties of F-ATP synthase were assessed in planar lipid bilayers. Results: Null mutants for the subunits e and g display dimer formation upon Cu2+ treatment and show PTP-dependent mitochondrial Ca2+ release but not swelling. Cu2+ treatment causes formation of disulfide bridges between Cys23 of subunits a that stabilize dimers in absence of e and g subunits and favors the open state of wild-type F-ATP synthase channels. Absence of e and g subunits decreases conductance of the F-ATP synthase channel about tenfold. Ablation of the first TM of subunit b, which creates a distinct lateral domain with e and g, further affected channel activity. Conclusion: F-ATP synthase e, g and b subunits create a domain within the membrane that is critical for the generation of the high-conductance channel, thus is a prime candidate for PTP formation. Subunits e and g are only present in eukaryotes and may have evolved to confer this novel function to F-ATP synthase.
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22
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Kidd J, Carraro M, Essick K, Johnson E, Reichard J. Impact of specialty pharmacy taking ownership of the prior authorization process of multiple sclerosis specialty medications to increase access todisease-modifying therapy. J Drug Assess 2018. [DOI: 10.1080/21556660.2018.1521069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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23
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Guo L, Carraro M, Sartori G, Minervini G, Eriksson O, Petronilli V, Bernardi P. Arginine 107 of yeast ATP synthase subunit g mediates sensitivity of the mitochondrial permeability transition to phenylglyoxal. J Biol Chem 2018; 293:14632-14645. [PMID: 30093404 DOI: 10.1074/jbc.ra118.004495] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 07/27/2018] [Indexed: 12/18/2022] Open
Abstract
Modification with arginine-specific glyoxals modulates the permeability transition (PT) of rat liver mitochondria, with inhibitory or inducing effects that depend on the net charge of the adduct(s). Here, we show that phenylglyoxal (PGO) affects the PT in a species-specific manner (inhibition in mouse and yeast, induction in human and Drosophila mitochondria). Following the hypotheses (i) that the effects are mediated by conserved arginine(s) and (ii) that the PT is mediated by the F-ATP synthase, we have narrowed the search to 60 arginines. Most of these residues are located in subunits α, β, γ, ϵ, a, and c and were excluded because PGO modification did not significantly affect enzyme catalysis. On the other hand, yeast mitochondria lacking subunit g or bearing a subunit g R107A mutation were totally resistant to PT inhibition by PGO. Thus, the effect of PGO on the PT is specifically mediated by Arg-107, the only subunit g arginine that has been conserved across species. These findings are evidence that the PT is mediated by F-ATP synthase.
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Affiliation(s)
- Lishu Guo
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Michela Carraro
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Geppo Sartori
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Giovanni Minervini
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Ove Eriksson
- the Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Helsinki 00290, Finland
| | - Valeria Petronilli
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
| | - Paolo Bernardi
- From the Consiglio Nazionale delle Ricerche Institute of Neuroscience and Department of Biomedical Sciences, University of Padova, Padova 35131, Italy and
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24
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Zanon F, Marcantoni L, Pastore G, Baracca E, Carraro M, Picariello C, Giatti S, Lanza D, Aggio S, D'Elia K, Roncon L. 5310His bundle pacing in patients with low ejection fraction at implant: long-term follow-up. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | - S Aggio
- General Hospital, Rovigo, Italy
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25
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Zanon F, Marcantoni L, Pastore G, Baracca E, Picariello C, Galasso MP, Lanza D, Giatti S, Aggio S, D'Elia K, Carraro M, Roncon L. P5739LV lead apical position could be the best option in selected CRT patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | - S Aggio
- General Hospital, Rovigo, Italy
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26
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Zanon F, Marcantoni L, Pastore G, Baracca E, Picariello C, Lanza D, Giatti S, D'Elia K, Conte L, Carraro M, Roncon L. P5736MPP reduces the ventricular arrhythmias burden compared to standard biventricular pacing in CRT patients. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | | | - L Conte
- General Hospital, Rovigo, Italy
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27
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Zanon F, Marcantoni L, Baracca E, Pastore G, Giatti S, Aggio S, Picariello C, Lanza D, Roncon L, Noventa F, Conte L, Carraro M, Rinuncini M, Galasso MP, D'elia K. P1132LV lead apical placement could be the best option in selected patients candidate to CRT. Europace 2018. [DOI: 10.1093/europace/euy015.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - S Aggio
- General Hospital, Rovigo, Italy
| | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | | | - L Conte
- General Hospital, Rovigo, Italy
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28
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Zanon F, Marcantoni L, Pastore G, Giatti S, Baracca E, Aggio S, Picariello C, Roncon L, Conte L, Lanza D, D' Elia K, Carraro M, Galasso MP, Rinuncini M. P411His pacing improved ejection fraction on long term follow-up in the subgroup of patients with low ejection fraction at implant. Europace 2018. [DOI: 10.1093/europace/euy015.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - S Aggio
- General Hospital, Rovigo, Italy
| | | | | | - L Conte
- General Hospital, Rovigo, Italy
| | - D Lanza
- General Hospital, Rovigo, Italy
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29
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Zanon F, Marcantoni L, Pastore G, Baracca E, Aggio S, Carraro M, Picariello C, Lanza D, Giatti S, Rinuncini M, Galasso MP, D'elia K, Roncon L, Conte L. 42His bundle pacing in BBB patients: outcomes over a long-term follow-up. Europace 2018. [DOI: 10.1093/europace/euy015.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | - S Aggio
- General Hospital, Rovigo, Italy
| | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | | | | | | | | | - L Conte
- General Hospital, Rovigo, Italy
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30
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Zanon F, Marcantoni L, Pastore G, Baracca E, Picariello C, Lanza D, Giatti S, Aggio S, Carraro M, Conte L, D'elia K, Roncon L, Rinuncini M, Galasso MP. 43Hisian pacing with apical back-up on demand is safe and effective. Europace 2018. [DOI: 10.1093/europace/euy015.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | - S Aggio
- General Hospital, Rovigo, Italy
| | | | - L Conte
- General Hospital, Rovigo, Italy
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31
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Zanon F, Marcantoni L, Baracca E, Pastore G, Giatti S, Aggio S, Picariello C, Lanza D, Roncon L, D'elia K, Noventa F, Carraro M, Rinuncini M, Galasso MP, Conte L. P1143MPP reduces the ventricular arrhythmias burden compared to standard biventricular pacing in CRT patients. Europace 2018. [DOI: 10.1093/europace/euy015.629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- F Zanon
- General Hospital, Rovigo, Italy
| | | | | | | | | | - S Aggio
- General Hospital, Rovigo, Italy
| | | | - D Lanza
- General Hospital, Rovigo, Italy
| | | | | | | | | | | | | | - L Conte
- General Hospital, Rovigo, Italy
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Antoniel M, Jones K, Antonucci S, Spolaore B, Fogolari F, Petronilli V, Giorgio V, Carraro M, Di Lisa F, Forte M, Szabó I, Lippe G, Bernardi P. The unique histidine in OSCP subunit of F-ATP synthase mediates inhibition of the permeability transition pore by acidic pH. EMBO Rep 2018; 19:257-268. [PMID: 29217657 PMCID: PMC5797955 DOI: 10.15252/embr.201744705] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 11/09/2017] [Accepted: 11/14/2017] [Indexed: 01/19/2023] Open
Abstract
The permeability transition pore (PTP) is a Ca2+-dependent mitochondrial channel whose opening causes a permeability increase in the inner membrane to ions and solutes. The most potent inhibitors are matrix protons, with channel block at pH 6.5. Inhibition is reversible, mediated by histidyl residue(s), and prevented by their carbethoxylation by diethylpyrocarbonate (DPC), but their assignment is unsolved. We show that PTP inhibition by H+ is mediated by the highly conserved histidyl residue (H112 in the human mature protein) of oligomycin sensitivity conferral protein (OSCP) subunit of mitochondrial F1FO (F)-ATP synthase, which we also show to undergo carbethoxylation after reaction of mitochondria with DPC. Mitochondrial PTP-dependent swelling cannot be inhibited by acidic pH in H112Q and H112Y OSCP mutants, and the corresponding megachannels (the electrophysiological counterpart of the PTP) are insensitive to inhibition by acidic pH in patch-clamp recordings of mitoplasts. Cells harboring the H112Q and H112Y mutations are sensitized to anoxic cell death at acidic pH. These results demonstrate that PTP channel formation and its inhibition by H+ are mediated by the F-ATP synthase.
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Affiliation(s)
- Manuela Antoniel
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Kristen Jones
- Vollum Institute, Oregon Health and Sciences University, Portland, OR, USA
| | - Salvatore Antonucci
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Barbara Spolaore
- Department of Pharmaceutical and Pharmacological Sciences, University of Padova, Padova, Italy
| | - Federico Fogolari
- Department of Mathematics, Computer Sciences and Physics, University of Udine, Udine, Italy
| | - Valeria Petronilli
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Valentina Giorgio
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Michela Carraro
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Fabio Di Lisa
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Michael Forte
- Vollum Institute, Oregon Health and Sciences University, Portland, OR, USA
| | - Ildikó Szabó
- Department of Biology, University of Padova, Padova, Italy
| | - Giovanna Lippe
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Udine, Italy
| | - Paolo Bernardi
- Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy
- Department of Biomedical Sciences, University of Padova, Padova, Italy
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Zizzari A, Bianco M, del Mercato L, Carraro M, Bonchio M, Frigione M, Montagna F, Gigli G, Viola I, Arima V. Self-powered catalytic microfluidic platforms for fluid delivery. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Zanon F, Marcantoni L, Pastore G, Baracca E, Giau G, Picariello C, Aggio S, Carraro M, Roncon L, Lanza D. P1351Long-term follow-up of His pacing in a single center experience. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Zanon F, Marcantoni L, Pastore G, Picariello C, Aggio S, Lanza D, Roncon L, Carraro M, Conte L, Rinuncini M, D'elia K, Galasso MP, Baracca E. 177Direct his-bundle pacing in cardiac resynchronization therapy. Europace 2017. [DOI: 10.1093/ehjci/eux136.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Pastore G, Marcantoni L, Zanon F, Maines M, Corbucci G, Noventa F, Piccariello C, Baracca E, Carraro M, Conte L, Roncon L. P1006Patients with RBBB and concomitant delayed LV activation respond to CRT. Europace 2017. [DOI: 10.1093/ehjci/eux151.187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Zanon F, Marcantoni L, Pastore G, Baracca E, Lanza D, Picariello C, Aggio S, Roncon L, Conte L, Carraro M, Noventa F, Prinzen F. P990Patients with LBBB have a longer LV electrical delay and a better acute hemodynamic improvement during CRT compared to non-LBBB patients. Europace 2017. [DOI: 10.1093/ehjci/eux151.171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Zanon F, Marcantoni L, Pastore G, Lanza D, Conte L, Picariello C, Aggio S, Roncon L, Galasso MP, Rinuncini M, D'elia K, Carraro M, Baracca E. P991Long term follow-up of the hisian pacing system: technical and clinical outcomes in a single centre experience. Europace 2017. [DOI: 10.1093/ehjci/eux151.172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Seyed Dorraji M, Amani-Ghadim A, Hanifehpour Y, Woo Joo S, Figoli A, Carraro M, Tasselli F. Performance of chitosan based nanocomposite hollow fibers in the removal of selenium(IV) from water. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2016.10.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Carraro M, Guo L, Giorgio V, Checchetto V, Šileikytė J, Sartori G, Forte M, Lippe G, Zoratti M, Szabò I, Bernardi P. Shedding light on the permeability transition through S. cerevisiae F-ATP synthase mutagenesis. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2016. [DOI: 10.1016/j.bbabio.2016.04.156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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41
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Carraro M, Bernardi P. Calcium and reactive oxygen species in regulation of the mitochondrial permeability transition and of programmed cell death in yeast. Cell Calcium 2016; 60:102-7. [PMID: 26995056 DOI: 10.1016/j.ceca.2016.03.005] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/07/2016] [Accepted: 03/08/2016] [Indexed: 01/28/2023]
Abstract
Mitochondria-dependent programmed cell death (PCD) in yeast shares many features with the intrinsic apoptotic pathway of mammals. With many stimuli, increased cytosolic [Ca(2+)] and ROS generation are the triggering signals that lead to mitochondrial permeabilization and release of proapoptotic factors, which initiates yeast PCD. While in mammals the permeability transition pore (PTP), a high-conductance inner membrane channel activated by increased matrix Ca(2+) and oxidative stress, is recognized as part of this signaling cascade, whether a similar process occurs in yeast is still debated. The potential role of the PTP in yeast PCD has generally been overlooked because yeast mitochondria lack the Ca(2+) uniporter, which in mammals allows rapid equilibration of cytosolic Ca(2+) with the matrix. In this short review we discuss the nature of the yeast permeability transition and reevaluate its potential role in the effector phase of yeast PCD triggered by Ca(2+) and oxidative stress.
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Affiliation(s)
- Michela Carraro
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Italy
| | - Paolo Bernardi
- Department of Biomedical Sciences and CNR Neuroscience Institute, University of Padova, Italy.
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42
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Azzena U, Carraro M, Pisano L, Mocci F, Antonello S, Maran F. Reducing properties of 1,2-dipyridyl-1,2-disodioethanes: chemical validation of theoretical and electrochemical predictions. RSC Adv 2016. [DOI: 10.1039/c6ra03303b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Theoretical calculations and electrochemical analysis were used to set up a relative scale for the reducing strength of the dianions of 1,2-dipyridylethenes, validated by studying their reactivity towards halogenated benzoic and arylacetic acids.
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Affiliation(s)
- U. Azzena
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
| | - M. Carraro
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
| | - L. Pisano
- Dipartimento di Chimica e Farmacia
- Università di Sassari
- I-07100 Sassari
- Italy
| | - F. Mocci
- Dipartimento di Scienze Chimiche e Geologiche
- Università di Cagliari
- Complesso Universitario
- I – 09042 Monserrato (Ca)
- Italy
| | - S. Antonello
- Dipartimento di Scienze Chimiche e Geologiche
- Università di Padova
- I-35131 Padova
- Italy
| | - F. Maran
- Dipartimento di Scienze Chimiche e Geologiche
- Università di Padova
- I-35131 Padova
- Italy
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Vilona D, Di Lorenzo R, Carraro M, Licini G, Trainotti L, Bonchio M. Viral nano-hybrids for innovative energy conversion and storage schemes. J Mater Chem B 2015; 3:6718-6730. [PMID: 32262464 DOI: 10.1039/c5tb00924c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Typical rod-like viruses (the Tobacco Mosaic Virus (TMV) and the Bacteriophage M13) are biological nanostructures that couple a 1D mono-dispersed morphology with a precisely defined topology of surface spaced and orthogonal reactive domains. These biogenic scaffolds offer a unique alternative to synthetic nano-platforms for the assembly of functional molecules and materials. Spatially resolved 1D arrays of inorganic-organic hybrid domains can thus be obtained on viral nano-templates resulting in the functional arrangement of photo-triggers and catalytic sites with applications in light energy conversion and storage. Different synthetic strategies are herein highlighted depending on the building blocks and with a particular emphasis on the molecular design of viral-templated nano-interfaces holding great potential for the dream-goal of artificial photosynthesis.
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Affiliation(s)
- D Vilona
- CNR-ITM and Department of Chemical Sciences, University of Padova, via F. Marzolo 1, 35131 Padova, Italy.
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44
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Campanacci L, Faccini L, Englaro E, Rustia R, Guarnieri GF, Barat R, Carraro M, De Zotti R, Micheli W. Exercise-induced proteinuria. Contrib Nephrol 2015; 26:31-41. [PMID: 7285588 DOI: 10.1159/000396102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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45
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Toigo G, Situlin R, Carraro M, Faccini L, Russo M, Tamaro G, Collari P, Sergiani GF, Guarnieri GF. Evaluation of dietary compliance in patients with chronic renal failure on conservative treatment: comparison of methods to assess dietary intake. Contrib Nephrol 2015; 81:16-24. [PMID: 2093492 DOI: 10.1159/000418731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- G Toigo
- Institute of Medical Pathology, University of Trieste, Italy
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46
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Carraro M, Stacul F, Collari P, Toson D, Zucconi F, Torre R, Faccini L, Dalla Palma L. Contrast media nephrotoxicity: urinary protein and enzyme pattern in patients with or without saline infusion during digital subtracting angiography. Contrib Nephrol 2015; 101:251-4. [PMID: 8467682 DOI: 10.1159/000422139] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- M Carraro
- Istituti di Patologia Medica, Università di Trieste, Italia
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47
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Guarnieri G, Toigo G, Situlin R, Carraro M, Tamaro G. The assessment of nutritional status in chronically uremic patients. Contrib Nephrol 2015; 72:73-103. [PMID: 2663342 DOI: 10.1159/000417322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- G Guarnieri
- Institute of Medical Pathology, University of Trieste, Italy
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48
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Seyed Dorraji M, Mirmohseni A, Carraro M, Gross S, Simone S, Tasselli F, Figoli A. Fenton-like catalytic activity of wet-spun chitosan hollow fibers loaded with Fe3O4 nanoparticles: Batch and continuous flow investigations. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.01.003] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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49
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Zizzari A, Bianco M, Miglietta R, del Mercato LL, Carraro M, Sorarù A, Bonchio M, Gigli G, Rinaldi R, Viola I, Arima V. Catalytic oxygen production mediated by smart capsules to modulate elastic turbulence under a laminar flow regime. Lab Chip 2014; 14:4391-4397. [PMID: 25238401 DOI: 10.1039/c4lc00791c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Liquid flow in microchannels is completely laminar and uniaxial, with a very low Reynolds number regime and long mixing lengths. To increase fluid mixing and solubility of reactants, as well as to reduce reaction time, complex three-dimensional networks inducing chaotic advection have to be designed. Alternatively, turbulence in the liquid can be generated by active mixing methods (magnetic, acoustic waves, etc.) or adding small quantities of elastic materials to the working liquid. Here, polyelectrolyte multilayer capsules embodying a catalytic polyoxometalate complex have been suspended in an aqueous solution and used to create elastic turbulence and to propel fluids inside microchannels as an alternative to viscoelastic polymers. The overall effect is enhanced and controlled by feeding the polyoxometalate-modified capsules with hydrogen peroxide, H2O2, thus triggering an on-demand propulsion due to oxygen evolution resulting from H2O2 decomposition. The quantification of the process is done by analysing some structural parameters of motion such as speed, pressure, viscosity, and Reynolds and Weissenberg numbers, directly obtained from the capillary dynamics of the aqueous mixtures with different concentrations of H2O2. The increases in fluid speed as well as the capsule-induced turbulence effects are proportional to the H2O2 added and therefore dependent on the kinetics of H2O2 dismutation.
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Affiliation(s)
- A Zizzari
- NNL, Nanoscience Institute-CNR Via Arnesano, 16, 73100 Lecce, Italy.
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50
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Carraro M, Giorgio V, Šileikytė J, Sartori G, Forte M, Lippe G, Zoratti M, Szabò I, Bernardi P. Channel formation by yeast F-ATP synthase and the role of dimerization in the mitochondrial permeability transition. J Biol Chem 2014; 289:15980-5. [PMID: 24790105 DOI: 10.1074/jbc.c114.559633] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Purified F-ATP synthase dimers of yeast mitochondria display Ca(2+)-dependent channel activity with properties resembling those of the permeability transition pore (PTP) of mammals. After treatment with the Ca(2+) ionophore ETH129, which allows electrophoretic Ca(2+) uptake, isolated yeast mitochondria undergo inner membrane permeabilization due to PTP opening. Yeast mutant strains ΔTIM11 and ΔATP20 (lacking the e and g F-ATP synthase subunits, respectively, which are necessary for dimer formation) display a striking resistance to PTP opening. These results show that the yeast PTP originates from F-ATP synthase and indicate that dimerization is required for pore formation in situ.
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Affiliation(s)
- Michela Carraro
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
| | - Valentina Giorgio
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
| | - Justina Šileikytė
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
| | - Geppo Sartori
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
| | - Michael Forte
- the Vollum Institute, Oregon Health and Sciences University, Portland, Oregon 97239-3098, and
| | - Giovanna Lippe
- the Department of Food Science, University of Udine, 33100 Udine, Italy
| | - Mario Zoratti
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
| | - Ildikò Szabò
- the Department of Biology, University of Padova, I-35121 Padova, Italy
| | - Paolo Bernardi
- From the Consiglio Nazionale delle Ricerche Neuroscience Institute and Department of Biomedical Sciences and
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