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Lin X, Zhou Y, Xue L. Mitochondrial complex I subunit MT-ND1 mutations affect disease progression. Heliyon 2024; 10:e28808. [PMID: 38596130 PMCID: PMC11002282 DOI: 10.1016/j.heliyon.2024.e28808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 03/24/2024] [Accepted: 03/25/2024] [Indexed: 04/11/2024] Open
Abstract
Mitochondrial respiratory chain complex I is an important component of the oxidative respiratory chain, with the mitochondrially encoded NADH:ubiquinone oxidoreductase core subunit 1 (MT-ND1) being one of the core subunits. MT-ND1 plays a role in the assembly of complex I and its enzymatic function. MT-ND1 gene mutation affects pathophysiological processes, such as interfering with the early assembly of complex I, affecting the ubiquinone binding domain and proton channel of complex I, and affecting oxidative phosphorylation, thus leading to the occurrence of diseases. The relationship between MT-ND1 gene mutation and disease has been has received increasing research attention. Therefore, this article reviews the impact of MT-ND1 mutations on disease progression, focusing on the impact of such mutations on diseases and their possible mechanisms, as well as the application of targeting MT-ND1 gene mutations in disease diagnosis and treatment. We aim to provide a new perspective leading to a more comprehensive understanding of the relationship between MT-ND1 gene mutations and diseases.
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Affiliation(s)
- Xi Lin
- Department of Pathology, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, China
- Cancer Research Institute, Basic School of Medicine, Central South University, Changsha, Hunan 410078, China
| | - Yanhong Zhou
- Cancer Research Institute, Basic School of Medicine, Central South University, Changsha, Hunan 410078, China
| | - Lei Xue
- Department of Pathology, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, China
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Eden J, Breuer E, Birrer D, Müller M, Pfister M, Mayr H, Sun K, Widmer J, Huwyler F, Ungethüm U, Humar B, Gupta A, Schiess S, Wendt M, Immer F, Elmer A, Meierhofer D, Schlegel A, Dutkowski P. Screening for mitochondrial function before use-routine liver assessment during hypothermic oxygenated perfusion impacts liver utilization. EBioMedicine 2023; 98:104857. [PMID: 37918219 PMCID: PMC10641151 DOI: 10.1016/j.ebiom.2023.104857] [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: 07/20/2023] [Revised: 10/15/2023] [Accepted: 10/15/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND To report on a concept of liver assessment during ex situ hypothermic oxygenated perfusion (HOPE) and its significant impact on liver utilization. METHODS An analysis of prospectively collected data on donation after circulatory death (DCD) livers, treated by HOPE at our institution, during a 11-year period between January 2012 and December 2022. FINDINGS Four hundred and fifteen DCD Maastricht III livers were offered during the study period in Switzerland, resulting in 249 liver transplants. Of those, we performed 158 DCD III liver transplants at our institution, with 1-year patient survival and death censored graft survival (death with functioning graft) of 87 and 89%, respectively, thus comparable to benchmark graft survivals of ideal DBD and DCD liver transplants (89% and 86%). Correspondingly, graft loss for primary non-function or cholangiopathy was overall low, i.e., 7/158 (4.4%) and 11/158 (6.9%), despite more than 82% of DCD liver grafts ranked high (6-10 points) or futile risk (>10 points) according to the UK-DCD score. Consistently, death censored graft survival was not different between low-, high-risk or futile DCD III livers. The key behind these achievements was the careful development and implementation of a routine perfusate assessment of mitochondrial biomarkers for injury and function, i.e., release of flavin mononucleotide from complex I, perfusate NADH, and mitochondrial CO2 production during HOPE, allowing a more objective interpretation of liver quality on a subcellular level, compared to donor derived data. INTERPRETATION HOPE after cold storage is a highly suitable and easy to perform perfusion approach, which allows reliable liver graft assessment, enabling surgeons to make a fact based decision on whether or not to implant the organ. HOPE-treatment should be combined with viability assessment particularly when used for high-risk organs, including DCD livers or organs with relevant steatosis. FUNDING This study was supported by the Swiss National Foundation (SNF) grant 320030_189055/1 to PD.
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Affiliation(s)
- Janina Eden
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Eva Breuer
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Dominique Birrer
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Matteo Müller
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Matthias Pfister
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Hemma Mayr
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Keyue Sun
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Jeannette Widmer
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Florian Huwyler
- Department of Mechanical and Process Engineering, ETH Zurich, Zurich, Switzerland
| | - Udo Ungethüm
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Bostjan Humar
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Anurag Gupta
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Stefanie Schiess
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Martin Wendt
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland
| | - Franz Immer
- Swisstransplant, The Swiss National Foundation for Organ Donation and Transplantation, Effingerstrasse 1, Bern 3011, Switzerland
| | - Andreas Elmer
- Swisstransplant, The Swiss National Foundation for Organ Donation and Transplantation, Effingerstrasse 1, Bern 3011, Switzerland
| | - David Meierhofer
- Max Planck Institute for Molecular Genetics, Mass Spectrometry Facility, Berlin 14195, Germany
| | - Andrea Schlegel
- Transplantation Center, Digestive Disease and Surgery Institute and Department of Immunology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Philipp Dutkowski
- Department of Surgery and Transplantation, Swiss HPB Centre, University Hospital Zurich, Switzerland.
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Okoye CN, Koren SA, Wojtovich AP. Mitochondrial complex I ROS production and redox signaling in hypoxia. Redox Biol 2023; 67:102926. [PMID: 37871533 PMCID: PMC10598411 DOI: 10.1016/j.redox.2023.102926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 09/29/2023] [Accepted: 10/06/2023] [Indexed: 10/25/2023] Open
Abstract
Mitochondria are a main source of cellular energy. Oxidative phosphorylation (OXPHOS) is the major process of aerobic respiration. Enzyme complexes of the electron transport chain (ETC) pump protons to generate a protonmotive force (Δp) that drives OXPHOS. Complex I is an electron entry point into the ETC. Complex I oxidizes nicotinamide adenine dinucleotide (NADH) and transfers electrons to ubiquinone in a reaction coupled with proton pumping. Complex I also produces reactive oxygen species (ROS) under various conditions. The enzymatic activities of complex I can be regulated by metabolic conditions and serves as a regulatory node of the ETC. Complex I ROS plays diverse roles in cell metabolism ranging from physiologic to pathologic conditions. Progress in our understanding indicates that ROS release from complex I serves important signaling functions. Increasing evidence suggests that complex I ROS is important in signaling a mismatch in energy production and demand. In this article, we review the role of ROS from complex I in sensing acute hypoxia.
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Affiliation(s)
- Chidozie N Okoye
- Department of Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, 14642, USA
| | - Shon A Koren
- Department of Neurobiology, Harvard Medical School, Boston, MA, 02115, USA
| | - Andrew P Wojtovich
- Department of Anesthesiology and Perioperative Medicine, University of Rochester Medical Center, Rochester, NY, 14642, USA; Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, 14642, USA.
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Differences in mitochondrial function between brain and heart of senile rats exposed to acute hypobaric hypoxia. Role of nitric oxide. Exp Gerontol 2023; 173:112100. [PMID: 36690048 DOI: 10.1016/j.exger.2023.112100] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/17/2023] [Accepted: 01/19/2023] [Indexed: 01/22/2023]
Abstract
Rat brain and heart display different endogenous protective responses against hypobaric hypoxia in an age-dependent way. The aim of the present work was to evaluate the effects of acute hypobaric hypoxia (HH, 48 h) on brain and heart mitochondrial function as well as the participation of nitric oxide (NO) in old rats (22-month old). Cortical mitochondria from rats exposed to HH decreased respiratory rates (37 %, state 3) and membrane potential (20 %), but NO and H2O2 production increased by 48 %, and 23 %, respectively. Hippocampal mitochondria preserved O2 consumption and H2O2 production, decreased membrane potential (18 %) and increased NO production (46 %). By contrast, HH decreased NO production (53 %) in mitochondria from left heart ventricles associated with increased cytochrome oxidase activity (39 %) and decreased NADPH oxidase activity (31 %). Also, a tendency to increase complex I-III (24 %) and complex II-III (65 %) activity was observed. In conclusion, after HH hippocampal and cortical mitochondria showed mild uncoupling and increased NO production. However, only the hippocampus preserved O2 consumption and H2O2 levels. Interestingly, heart mitochondria showed a decreased ROS production through increased cytochrome oxidase activity associated with a decrease in NO production. This may be interpreted as a self-protective mechanism against hypoxia.
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Fernández-Vizarra E, Ugalde C. Cooperative assembly of the mitochondrial respiratory chain. Trends Biochem Sci 2022; 47:999-1008. [PMID: 35961810 DOI: 10.1016/j.tibs.2022.07.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Revised: 06/30/2022] [Accepted: 07/18/2022] [Indexed: 12/24/2022]
Abstract
Deep understanding of the pathophysiological role of the mitochondrial respiratory chain (MRC) relies on a well-grounded model explaining how its biogenesis is regulated. The lack of a consistent framework to clarify the modes and mechanisms governing the assembly of the MRC complexes and supercomplexes (SCs) works against progress in the field. The plasticity model was postulated as an attempt to explain the coexistence of mammalian MRC complexes as individual entities and associated in SC species. However, mounting data accumulated throughout the years question the universal validity of the plasticity model as originally proposed. Instead, as we argue here, a cooperative assembly model provides a much better explanation to the phenomena observed when studying MRC biogenesis in physiological and pathological settings.
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Affiliation(s)
- Erika Fernández-Vizarra
- Veneto Institute of Molecular Medicine, 35129 Padova, Italy; Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy.
| | - Cristina Ugalde
- Instituto de Investigación Hospital 12 de Octubre, Madrid 28041, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), U723, Madrid, Spain.
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Hu T, Wu Q, Yao Q, Jiang K, Yu J, Tang Q. Short-chain fatty acid metabolism and multiple effects on cardiovascular diseases. Ageing Res Rev 2022; 81:101706. [PMID: 35932976 DOI: 10.1016/j.arr.2022.101706] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 07/10/2022] [Accepted: 08/01/2022] [Indexed: 01/31/2023]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of mortality worldwide, and fatty acid metabolism has been well studied. Short-chain fatty acids (SCFAs) have been less discussed than long-chain fatty acids (LCFAs) in CVDs. However, increasing evidence indicates the importance of SCFAs in regulating cardiac function. Here, we summarize the current understanding of SCFAs in hypertension, ischaemic reperfusion, myocardial infarction, atherosclerosis and heart failure. Most SCFAs exert positive effects in regulating related diseases. Butyrate and propionate can reduce blood pressure, improve I/R injury and decrease the risk of coronary artery disease (CAD) and atherosclerosis. Acetate can also play a positive role in regulating hypertension and preventing atherosclerosis, and malonate can improve cardiac function after MI. They affect these diseases by regulating inflammation, the immune system and related G protein-coupled receptors, with multiple neurohumoural regulation participation. In contrast, succinate can accelerate IR injury, increasing mitochondrial ROS production. SCFAs ultimately affect the regulation of different pathophysiological processes in heart failure. Here, we clarified the importance of short-chain fatty acids in the cardiovascular system and their multiple effects in various pathophysiological processes, providing new insights into their promising clinical application. More research should be conducted to further elucidate the underlying mechanism and different effects of single or multiple SCFA supplementation on the cardiovascular system.
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Affiliation(s)
- Tongtong Hu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China
| | - Qingqing Wu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China
| | - Qi Yao
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China
| | - Kebing Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China
| | - Jiabin Yu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China
| | - Qizhu Tang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China; Hubei Key Laboratory of Metabolic and Chronic Diseases, Wuhan 430060, PR China.
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