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Xu K, Saaoud F, Shao Y, Lu Y, Yang Q, Jiang X, Wang H, Yang X. A new paradigm in intracellular immunology: Mitochondria emerging as leading immune organelles. Redox Biol 2024; 76:103331. [PMID: 39216270 PMCID: PMC11402145 DOI: 10.1016/j.redox.2024.103331] [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: 07/19/2024] [Revised: 08/23/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024] Open
Abstract
Mitochondria, traditionally recognized as cellular 'powerhouses' due to their pivotal role in energy production, have emerged as multifunctional organelles at the intersection of bioenergetics, metabolic signaling, and immunity. However, the understanding of their exact contributions to immunity and inflammation is still developing. This review first introduces the innovative concept of intracellular immunity, emphasizing how mitochondria serve as critical immune signaling hubs. They are instrumental in recognizing and responding to pathogen and danger signals, and in modulating immune responses. We also propose mitochondria as the leading immune organelles, drawing parallels with the broader immune system in their functions of antigen presentation, immune regulation, and immune response. Our comprehensive review explores mitochondrial immune signaling pathways, their therapeutic potential in managing inflammation and chronic diseases, and discusses cutting-edge methodologies for mitochondrial research. Targeting a broad readership of both experts in mitochondrial functions and newcomers to the field, this review sets forth new directions that could transform our understanding of intracellular immunity and the integrated immune functions of intracellular organelles.
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Affiliation(s)
- Keman Xu
- Lemole Center for Integrated Lymphatics and Vascular Research, USA
| | - Fatma Saaoud
- Lemole Center for Integrated Lymphatics and Vascular Research, USA
| | - Ying Shao
- Lemole Center for Integrated Lymphatics and Vascular Research, USA
| | - Yifan Lu
- Lemole Center for Integrated Lymphatics and Vascular Research, USA
| | | | - Xiaohua Jiang
- Lemole Center for Integrated Lymphatics and Vascular Research, USA; Metabolic Disease Research and Thrombosis Research Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, 19140, USA
| | - Hong Wang
- Metabolic Disease Research and Thrombosis Research Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, 19140, USA
| | - Xiaofeng Yang
- Lemole Center for Integrated Lymphatics and Vascular Research, USA; Metabolic Disease Research and Thrombosis Research Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, 19140, USA.
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Chen Y, Yu T, Deuster PA. Maintaining mitochondrial NAD + homeostasis is key for heat-induced skeletal muscle injury prevention despite presence of intracellular cation alterations. Appl Physiol Nutr Metab 2024; 49:1409-1418. [PMID: 38981136 DOI: 10.1139/apnm-2024-0157] [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] [Indexed: 07/11/2024]
Abstract
Mitochondrial dysfunction is implicated in heat-induced skeletal muscle (SKM) injury and its underlying mechanisms remain unclear. Evidence suggests that cellular ions and molecules, including divalent cations and adenine nucleotides, are involved in the regulation of mitochondrial function. In this study, we examined Ca2+, Mg2+, and NAD+ levels in mouse C2C12 myoblasts and SKM in response to heat exposure. During heat exposure, mitochondrial Ca2+ levels increased significantly, whereas cytosolic Ca2+ levels remained unaltered. The mitochondrial Ca2+ levels in the SKM of heat-exposed mice were 28% higher compared to control mice. No changes in cytosolic Ca2+ were detected between the two groups. Following heat exposure, cytosolic and mitochondrial Mg2+ levels were reduced by 47% and 23% in C2C12 myoblasts, and by 51% and 44% in mouse SKMs, respectively. In addition, heat exposure decreased mitochondrial NAD+ levels by 32% and 26% in C2C12 myoblasts and mouse SKMs, respectively. Treatment with the NAD+ precursor nicotinamide riboside (NR) partially prevented heat-induced depletion of NAD+. Additionally, NR significantly reduced heat-increased mitochondrial fission, mitochondrial depolarization, and apoptosis in C2C12 myoblasts and mouse SKMs. No effects of NR on heat-induced changes in intracellular Ca2+ and Mg2+ levels were observed. This study provides in vitro and in vivo evidence that acute heat stress causes alterations in mitochondrial Ca2+, Mg2+, and NAD+ homeostasis. Our results suggest mitochondrial NAD+ homeostasis as a therapeutic target for the prevention of heat-induced SKM injury.
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Affiliation(s)
- Yifan Chen
- Consortium for Health and Military Performance, Department of Military and Emergency Medicine, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD 20814, USA
| | - Tianzheng Yu
- Consortium for Health and Military Performance, Department of Military and Emergency Medicine, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD 20814, USA
- Henry M Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD 20817, USA
| | - Patricia A Deuster
- Consortium for Health and Military Performance, Department of Military and Emergency Medicine, F. Edward Hébert School of Medicine, Uniformed Services University, Bethesda, MD 20814, USA
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Xu P, Swain S, Novorolsky RJ, Garcia E, Huang Z, Snutch TP, Wilson JJ, Robertson GS, Renden RB. The mitochondrial calcium uniporter inhibitor Ru265 increases neuronal excitability and reduces neurotransmission via off-target effects. Br J Pharmacol 2024; 181:3503-3526. [PMID: 38779706 PMCID: PMC11309911 DOI: 10.1111/bph.16425] [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: 09/25/2023] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
BACKGROUND AND PURPOSE Excitotoxicity due to mitochondrial calcium (Ca2+) overloading can trigger neuronal cell death in a variety of pathologies. Inhibiting the mitochondrial calcium uniporter (MCU) has been proposed as a therapeutic avenue to prevent calcium overloading. Ru265 (ClRu(NH3)4(μ-N)Ru(NH3)4Cl]Cl3) is a cell-permeable inhibitor of the mitochondrial calcium uniporter (MCU) with nanomolar affinity. Ru265 reduces sensorimotor deficits and neuronal death in models of ischemic stroke. However, the therapeutic use of Ru265 is limited by the induction of seizure-like behaviours. EXPERIMENTAL APPROACH We examined the effect of Ru265 on synaptic and neuronal function in acute brain slices and hippocampal neuron cultures derived from mice, in control and where MCU expression was genetically abrogated. KEY RESULTS Ru265 decreased evoked responses from calyx terminals and induced spontaneous action potential firing of both the terminal and postsynaptic principal cell. Recordings of presynaptic Ca2+ currents suggested that Ru265 blocks the P/Q type channel, confirmed by the inhibition of currents in cells exogenously expressing the P/Q type channel. Measurements of presynaptic K+ currents further revealed that Ru265 blocked a KCNQ current, leading to increased membrane excitability, underlying spontaneous spiking. Ca2+ imaging of hippocampal neurons showed that Ru265 increased synchronized, high-amplitude events, recapitulating seizure-like activity seen in vivo. Importantly, MCU ablation did not suppress Ru265-induced increases in neuronal activity and seizures. CONCLUSIONS AND IMPLICATIONS Our findings provide a mechanistic explanation for the pro-convulsant effects of Ru265 and suggest counter screening assays based on the measurement of P/Q and KCNQ channel currents to identify safe MCU inhibitors.
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Affiliation(s)
- Peng Xu
- Department of Physiology and Cell Biology, University of Nevada, Reno, Reno, Nevada, USA
| | - Sarpras Swain
- Department of Physiology and Cell Biology, University of Nevada, Reno, Reno, Nevada, USA
| | - Robyn J Novorolsky
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Esperanza Garcia
- Michael Smith Laboratories and Djavad Mowafaghian Centre for Brain Health University of British Columbia, Vancouver, British Columbia, Canada
| | - Zhouyang Huang
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York, USA
| | - Terrance P Snutch
- Michael Smith Laboratories and Djavad Mowafaghian Centre for Brain Health University of British Columbia, Vancouver, British Columbia, Canada
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York, USA
| | - George S Robertson
- Department of Pharmacology, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Psychiatry, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Robert B Renden
- Department of Physiology and Cell Biology, University of Nevada, Reno, Reno, Nevada, USA
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Zhang X, Wang Y, Li H, Wang DW, Chen C. Insights into the post-translational modifications in heart failure. Ageing Res Rev 2024; 100:102467. [PMID: 39187021 DOI: 10.1016/j.arr.2024.102467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 08/01/2024] [Accepted: 08/20/2024] [Indexed: 08/28/2024]
Abstract
Heart failure (HF), as the terminal manifestation of multiple cardiovascular diseases, causes a huge socioeconomic burden worldwide. Despite the advances in drugs and medical-assisted devices, the prognosis of HF remains poor. HF is well-accepted as a myriad of subcellular dys-synchrony related to detrimental structural and functional remodelling of cardiac components, including cardiomyocytes, fibroblasts, endothelial cells and macrophages. Through the covalent chemical process, post-translational modifications (PTMs) can coordinate protein functions, such as re-localizing cellular proteins, marking proteins for degradation, inducing interactions with other proteins and tuning enzyme activities, to participate in the progress of HF. Phosphorylation, acetylation, and ubiquitination predominate in the currently reported PTMs. In addition, advanced HF is commonly accompanied by metabolic remodelling including enhanced glycolysis. Thus, glycosylation induced by disturbed energy supply is also important. In this review, firstly, we addressed the main types of HF. Then, considering that PTMs are associated with subcellular locations, we summarized the leading regulation mechanisms in organelles of distinctive cell types of different types of HF, respectively. Subsequently, we outlined the aforementioned four PTMs of key proteins and signaling sites in HF. Finally, we discussed the perspectives of PTMs for potential therapeutic targets in HF.
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Affiliation(s)
- Xudong Zhang
- Division of Cardiology, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan 430030, China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan 430030, China
| | - Yan Wang
- Division of Cardiology, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan 430030, China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan 430030, China
| | - Huaping Li
- Division of Cardiology, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan 430030, China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan 430030, China
| | - Dao Wen Wang
- Division of Cardiology, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan 430030, China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan 430030, China.
| | - Chen Chen
- Division of Cardiology, Tongji Hospital, Tongji Medical College and State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan 430030, China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan 430030, China.
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5
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Sun C, Wang Q, Li P, Dong R, Lei Y, Hu Y, Yan Y, Song G. The ROS Mediates MCUb in Mitochondria-Regulated Apoptosis of TM4 Cells Induced by Titanium Dioxide Nanoparticles. Biol Trace Elem Res 2024:10.1007/s12011-024-04339-6. [PMID: 39192169 DOI: 10.1007/s12011-024-04339-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 08/05/2024] [Indexed: 08/29/2024]
Abstract
Titanium dioxide nanoparticles (TiO2 NPs) can cause mitochondrial apoptosis of TM4 cells associated with reactive oxygen species (ROS) accumulation and Ca2+ overload, but the relations among these processes remain unclear. This study aimed to evaluate whether the accumulation of ROS caused by TiO2 NPs inhibits MCUb expression, leading to mitochondrial calcium overload and subsequent cell apoptosis through the mitochondrial pathway. TM4 cells were exposed to different concentrations of TiO2 NPs (0, 25, 50, 75, 100 μg/mL) for 24 h. We assessed cell viability, ROS level, MCUb and VDAC1 expression, mitochondrial and cytoplasmic Ca2+ levels, mitochondrial membrane potential (MMP), apoptosis rate, and key proteins related to mitochondrial apoptosis (Bcl-2, Bax, Caspase 3, Caspase 9, p53 and Cyt c). Additionally, the effect of N-acetylcysteine (NAC) on MCUb expression, calcium homeostasis, and cell apoptosis was evaluated. Compared to control group, TiO2 NPs significantly increased ROS level, downregulated MCUb expression, elevated Ca2+ levels in mitochondria and cytoplasm, and enhanced mitochondria-regulated apoptosis, starting from the 50 μg/mL TiO2 NPs group. However, NAC significantly increased MCUb expression, attenuated Ca2+ levels in mitochondria and cytoplasm, and reduced mitochondria-related apoptosis. In conclusion, TiO2 NPs induced ROS accumulation, which inhibited the expression of MCUb. The decreased MCUb level led to Ca2+ overload in mitochondria, causing TM4 cell apoptosis via the mitochondrial pathway. This research elucidates, for the first time, the role of MCUb and its relation with ROS in apoptosis of TM4 cells induced by TiO2 NPs, which supplementing the molecular mechanism of cell apoptosis caused by TiO2 NPs.
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Grants
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 2023AB049 Corps Science and Technology Planning Project
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 21966027, 81560536, and 32060125 National Natural Science Foundation of China
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
- 2023CB008-18 Youth Science and Technology Innovation Talents Project of Xinjiang Production and Construction Corps
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Affiliation(s)
- Chenhao Sun
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Qianqian Wang
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Pengfei Li
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Ruoyun Dong
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Yuzhu Lei
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Yunhua Hu
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Yizhong Yan
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China
| | - Guanling Song
- Department of Preventive Medicine/ the Key Laboratory for Prevention and Control of Emerging Infectious Diseases and Public Health Security, the Xinjiang Production and Construction Corps, School of Medicine, Shihezi University, Shihezi, 832000, Xinjiang, China.
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Lebas M, Chinigò G, Courmont E, Bettaieb L, Machmouchi A, Goveia J, Beatovic A, Van Kerckhove J, Robil C, Angulo FS, Vedelago M, Errerd A, Treps L, Gao V, Delgado De la Herrán HC, Mayeuf-Louchart A, L’homme L, Chamlali M, Dejos C, Gouyer V, Garikipati VNS, Tomar D, Yin H, Fukui H, Vinckier S, Stolte A, Conradi LC, Infanti F, Lemonnier L, Zeisberg E, Luo Y, Lin L, Desseyn JL, Pickering G, Kishore R, Madesh M, Dombrowicz D, Perocchi F, Staels B, Pla AF, Gkika D, Cantelmo AR. Integrated single-cell RNA-seq analysis reveals mitochondrial calcium signaling as a modulator of endothelial-to-mesenchymal transition. SCIENCE ADVANCES 2024; 10:eadp6182. [PMID: 39121218 PMCID: PMC11313856 DOI: 10.1126/sciadv.adp6182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 07/08/2024] [Indexed: 08/11/2024]
Abstract
Endothelial cells (ECs) are highly plastic, capable of differentiating into various cell types. Endothelial-to-mesenchymal transition (EndMT) is crucial during embryonic development and contributes substantially to vascular dysfunction in many cardiovascular diseases (CVDs). While targeting EndMT holds therapeutic promise, understanding its mechanisms and modulating its pathways remain challenging. Using single-cell RNA sequencing on three in vitro EndMT models, we identified conserved gene signatures. We validated original regulators in vitro and in vivo during embryonic heart development and peripheral artery disease. EndMT induction led to global expression changes in all EC subtypes rather than in mesenchymal clusters. We identified mitochondrial calcium uptake as a key driver of EndMT; inhibiting mitochondrial calcium uniporter (MCU) prevented EndMT in vitro, and conditional Mcu deletion in ECs blocked mesenchymal activation in a hind limb ischemia model. Tissues from patients with critical limb ischemia with EndMT features exhibited significantly elevated endothelial MCU. These findings highlight MCU as a regulator of EndMT and a potential therapeutic target.
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Affiliation(s)
- Mathilde Lebas
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Giorgia Chinigò
- Department of Life Sciences and Systems Biology, University of Torino, 10123 Torino, Italy
| | - Evan Courmont
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Louay Bettaieb
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Amani Machmouchi
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | | | | | | | - Cyril Robil
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Fabiola Silva Angulo
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Mauro Vedelago
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Alina Errerd
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
- Molecular Biosciences/Cancer Biology Program, Heidelberg University and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Lucas Treps
- Nantes Université, INSERM UMR 1307, CNRS UMR 6075, Université d'Angers, CRCI2NA, F-44000 Nantes, France
| | - Vance Gao
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | | | - Alicia Mayeuf-Louchart
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Laurent L’homme
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Mohamed Chamlali
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Camille Dejos
- INSERM, U1003 - PHYCEL - Physiologie Cellulaire, Université de Lille, F-59000 Lille, France
| | - Valérie Gouyer
- Université de Lille, Inserm, CHU Lille, U1286 Infinite, F-59000 Lille, France
| | - Venkata Naga Srikanth Garikipati
- Aging + Cardiovascular Discovery Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Dhanendra Tomar
- Department of Internal Medicine, Wake Forest University School of Medicine, Winston-Salem, NC 27157 USA
| | - Hao Yin
- Robarts Research Institute, Western University, London, Canada
| | - Hajime Fukui
- National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka 564-8565, Japan
| | - Stefan Vinckier
- Laboratory of Angiogenesis and Vascular Metabolism, Center for Cancer Biology (CCB), VIB and Department of Oncology, Leuven Cancer Institute (LKI), KU Leuven, Leuven, Belgium
| | - Anneke Stolte
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Robert-Koch-Straβe 40, 37075 Göttingen, Germany
| | - Lena-Christin Conradi
- Department of General, Visceral and Pediatric Surgery, University Medical Center Göttingen, Robert-Koch-Straβe 40, 37075 Göttingen, Germany
| | | | - Loic Lemonnier
- INSERM, U1003 - PHYCEL - Physiologie Cellulaire, Université de Lille, F-59000 Lille, France
| | - Elisabeth Zeisberg
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Lower Saxony, Göttingen, Germany
| | - Yonglun Luo
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Lin Lin
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Jean-Luc Desseyn
- Université de Lille, Inserm, CHU Lille, U1286 Infinite, F-59000 Lille, France
| | - Geoffrey Pickering
- Robarts Research Institute, Western University, London, Canada
- Department of Medicine, Biochemistry, and Medical Biophysics, Western University, London, Canada
| | - Raj Kishore
- Center for Translational Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
- Department of Cardiovascular Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140 USA
| | - Muniswamy Madesh
- Department of Medicine, Center for Mitochondrial Medicine, Division of Cardiology, University of Texas Health San Antonio, San Antonio, TX 78229 USA
| | - David Dombrowicz
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Fabiana Perocchi
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Zentrum München, Munich, Germany
- Institute of Neuronal Cell Biology, Technical University of Munich, Munich, Germany
- Munich Cluster for Systems Neurology, Munich, Germany
| | - Bart Staels
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
| | - Alessandra Fiorio Pla
- Department of Life Sciences and Systems Biology, University of Torino, 10123 Torino, Italy
- INSERM, U1003 - PHYCEL - Physiologie Cellulaire, Université de Lille, F-59000 Lille, France
| | - Dimitra Gkika
- Université de Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity Plasticity and Resistance to Therapies, F-59000 Lille, France
| | - Anna Rita Cantelmo
- Université de Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, F-59000 Lille, France
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Perkins GD, Neumar R, Hsu CH, Hirsch KG, Aneman A, Becker LB, Couper K, Callaway CW, Hoedemaekers CWE, Lim SL, Meurer W, Olasveengen T, Sekhon MS, Skrifvars M, Soar J, Tsai MS, Vengamma B, Nolan JP. Improving Outcomes After Post-Cardiac Arrest Brain Injury: A Scientific Statement From the International Liaison Committee on Resuscitation. Resuscitation 2024; 201:110196. [PMID: 38932555 DOI: 10.1016/j.resuscitation.2024.110196] [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] [Indexed: 06/28/2024]
Abstract
This scientific statement presents a conceptual framework for the pathophysiology of post-cardiac arrest brain injury, explores reasons for previous failure to translate preclinical data to clinical practice, and outlines potential paths forward. Post-cardiac arrest brain injury is characterized by 4 distinct but overlapping phases: ischemic depolarization, reperfusion repolarization, dysregulation, and recovery and repair. Previous research has been challenging because of the limitations of laboratory models; heterogeneity in the patient populations enrolled; overoptimistic estimation of treatment effects leading to suboptimal sample sizes; timing and route of intervention delivery; limited or absent evidence that the intervention has engaged the mechanistic target; and heterogeneity in postresuscitation care, prognostication, and withdrawal of life-sustaining treatments. Future trials must tailor their interventions to the subset of patients most likely to benefit and deliver this intervention at the appropriate time, through the appropriate route, and at the appropriate dose. The complexity of post-cardiac arrest brain injury suggests that monotherapies are unlikely to be as successful as multimodal neuroprotective therapies. Biomarkers should be developed to identify patients with the targeted mechanism of injury, to quantify its severity, and to measure the response to therapy. Studies need to be adequately powered to detect effect sizes that are realistic and meaningful to patients, their families, and clinicians. Study designs should be optimized to accelerate the evaluation of the most promising interventions. Multidisciplinary and international collaboration will be essential to realize the goal of developing effective therapies for post-cardiac arrest brain injury.
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Shapiro IM, Risbud MV, Landis WJ. Toward understanding the cellular control of vertebrate mineralization: The potential role of mitochondria. Bone 2024; 185:117112. [PMID: 38697384 PMCID: PMC11251007 DOI: 10.1016/j.bone.2024.117112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/17/2024] [Accepted: 04/29/2024] [Indexed: 05/05/2024]
Abstract
This review examines the possible role of mitochondria in maintaining calcium and phosphate ion homeostasis and participating in the mineralization of bone, cartilage and other vertebrate hard tissues. The paper builds on the known structural features of mitochondria and the documented observations in these tissues that the organelles contain calcium phosphate granules. Such deposits in mitochondria putatively form to buffer excessively high cytosolic calcium ion concentrations and prevent metabolic deficits and even cell death. While mitochondria protect cytosolic enzyme systems through this buffering capacity, the accumulation of calcium ions by mitochondria promotes the activity of enzymes of the tricarboxylic acid (TCA/Krebs) cycle, increases oxidative phosphorylation and ATP synthesis, and leads to changes in intramitochondrial pH. These pH alterations influence ion solubility and possibly the transitions and composition in the mineral phase structure of the granules. Based on these considerations, mitochondria are proposed to support the mineralization process by providing a mobile store of calcium and phosphate ions, in smaller cluster or larger granule form, while maintaining critical cellular activities. The rise in the mitochondrial calcium level also increases the generation of citrate and other TCA cycle intermediates that contribute to cell function and the development of extracellular mineral. This paper suggests that another key role of the mitochondrion, along with the effects just noted, is to supply phosphate ions, derived from the breakdown of ATP, to endolysosomes and autophagic vesicles originating in the endoplasmic reticulum and Golgi and at the plasma membrane. These many separate but interdependent mitochondrial functions emphasize the critical importance of this organelle in the cellular control of vertebrate mineralization.
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Affiliation(s)
- Irving M Shapiro
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States of America.
| | - Makarand V Risbud
- Department of Orthopaedic Surgery, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, United States of America
| | - William J Landis
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California at San Francisco, San Francisco, CA, United States of America
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9
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Valencia R, Kranrod JW, Fang L, Soliman AM, Azer B, Clemente-Casares X, Seubert JM. Linoleic acid-derived diol 12,13-DiHOME enhances NLRP3 inflammasome activation in macrophages. FASEB J 2024; 38:e23748. [PMID: 38940767 DOI: 10.1096/fj.202301640rr] [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: 08/11/2023] [Revised: 05/30/2024] [Accepted: 06/05/2024] [Indexed: 06/29/2024]
Abstract
12,13-dihydroxy-9z-octadecenoic acid (12,13-DiHOME) is a linoleic acid diol derived from cytochrome P-450 (CYP) epoxygenase and epoxide hydrolase (EH) metabolism. 12,13-DiHOME is associated with inflammation and mitochondrial damage in the innate immune response, but how 12,13-DiHOME contributes to these effects is unclear. We hypothesized that 12,13-DiHOME enhances macrophage inflammation through effects on NOD-like receptor protein 3 (NLRP3) inflammasome activation. To test this hypothesis, we utilized human monocytic THP1 cells differentiated into macrophage-like cells with phorbol myristate acetate (PMA). 12,13-DiHOME present during lipopolysaccharide (LPS)-priming of THP1 macrophages exacerbated nigericin-induced NLRP3 inflammasome activation. Using high-resolution respirometry, we observed that priming with LPS+12,13-DiHOME altered mitochondrial respiratory function. Mitophagy, measured using mito-Keima, was also modulated by 12,13-DiHOME present during priming. These mitochondrial effects were associated with increased sensitivity to nigericin-induced mitochondrial depolarization and reactive oxygen species production in LPS+12,13-DiHOME-primed macrophages. Nigericin-induced mitochondrial damage and NLRP3 inflammasome activation in LPS+12,13-DiHOME-primed macrophages were ablated by the mitochondrial calcium uniporter (MCU) inhibitor, Ru265. 12,13-DiHOME present during LPS-priming also enhanced nigericin-induced NLRP3 inflammasome activation in primary murine bone marrow-derived macrophages. In summary, these data demonstrate a pro-inflammatory role for 12,13-DiHOME by enhancing NLRP3 inflammasome activation in macrophages.
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Affiliation(s)
- Robert Valencia
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
- Cardiovascular Research Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Joshua W Kranrod
- Cardiovascular Research Institute, University of Alberta, Edmonton, Alberta, Canada
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Liye Fang
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
- Cardiovascular Research Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Amro M Soliman
- Department of Medical Microbiology and Immunology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Brandon Azer
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Xavier Clemente-Casares
- Cardiovascular Research Institute, University of Alberta, Edmonton, Alberta, Canada
- Department of Medical Microbiology and Immunology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
- Cancer Research Institute of Northern Alberta, University of Alberta, Edmonton, Alberta, Canada
- Li Ka Shing Institute of Virology, University of Alberta, Edmonton, Alberta, Canada
| | - John M Seubert
- Department of Pharmacology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
- Cardiovascular Research Institute, University of Alberta, Edmonton, Alberta, Canada
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada
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10
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Amjid U, Aziz U, Habib U, Jabeen I. Biological regulatory network analysis for targeting the mitochondrial calcium uniporter (MCU) mediated calcium (Ca 2+) transport in neurodegenerative disorders. Cell Biochem Funct 2024; 42:e4082. [PMID: 38944766 DOI: 10.1002/cbf.4082] [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: 04/02/2024] [Revised: 05/30/2024] [Accepted: 06/18/2024] [Indexed: 07/01/2024]
Abstract
Calcium (Ca2+) has been observed as the most important ion involved in a series of cellular processes and its homeostasis is critical for normal cellular functions. Mitochondrial calcium uniporter (MCU) complex has been recognized as the most important calcium-specific channel located in the inner mitochondrial membrane and is one of the major players in maintaining the Ca2+ homeostasis by transporting Ca2+ across the mitochondrial membrane. Furthermore, dysregulation of the mitochondrial Ca2+ homeostasis has been orchestrated to neurodegenerative response. This necessitates quantitative evaluation of the MCU-dependent mROS production and subsequent cellular responses for more specific therapeutic interventions against neurodegenerative disorders. Towards this goal, here we present a biological regulatory network of MCU to dynamically simulate the MCU-mediated ROS production and its response in neurodegeneration. Previously, ruthenium complex RuRed and its derivatives have been reported to show low nM to high µM potency against MCU to maintain cytosolic Ca2+ (cCa2+) homeostasis by modulating mitochondrial Ca2+ (mCa2+) uptake. Therefore, structural modeling and dynamic simulation of MCU pore-forming subunit is performed to probe the interaction profiling of previously reported Ru265 and its derivatives compounds with MCU. The current study highlighted MCU as a potential drug target in neurodegenerative disorders. Furthermore, ASP261 and GLU264 amino acid residues in DIME motif of MCU pore-forming subunits are identified as crucial for modulating the activity of MCU in neurodegenerative disorders.
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Affiliation(s)
- Umar Amjid
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences & Technology (NUST), Islamabad, Pakistan
- Department of Paediatrics and Child Health, Medical College, Aga Khan University Hospital, Karachi, Pakistan
| | - Ubair Aziz
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Uzma Habib
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences & Technology (NUST), Islamabad, Pakistan
| | - Ishrat Jabeen
- School of Interdisciplinary Engineering & Sciences (SINES), National University of Sciences & Technology (NUST), Islamabad, Pakistan
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11
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Vecellio Reane D, Serna JDC, Raffaello A. Unravelling the complexity of the mitochondrial Ca 2+ uniporter: regulation, tissue specificity, and physiological implications. Cell Calcium 2024; 121:102907. [PMID: 38788256 DOI: 10.1016/j.ceca.2024.102907] [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: 04/23/2024] [Revised: 05/10/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Calcium (Ca2+) signalling acts a pleiotropic message within the cell that is decoded by the mitochondria through a sophisticated ion channel known as the Mitochondrial Ca2+ Uniporter (MCU) complex. Under physiological conditions, mitochondrial Ca2+ signalling is crucial for coordinating cell activation with energy production. Conversely, in pathological scenarios, it can determine the fine balance between cell survival and death. Over the last decade, significant progress has been made in understanding the molecular bases of mitochondrial Ca2+ signalling. This began with the elucidation of the MCU channel components and extended to the elucidation of the mechanisms that regulate its activity. Additionally, increasing evidence suggests molecular mechanisms allowing tissue-specific modulation of the MCU complex, tailoring channel activity to the specific needs of different tissues or cell types. This review aims to explore the latest evidence elucidating the regulation of the MCU complex, the molecular factors controlling the tissue-specific properties of the channel, and the physiological and pathological implications of mitochondrial Ca2+ signalling in different tissues.
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Affiliation(s)
- Denis Vecellio Reane
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center (HDC), Helmholtz Zentrum Munich, Germany.
| | - Julian D C Serna
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | - Anna Raffaello
- Department of Biomedical Sciences, University of Padova, Italy.
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12
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Colussi DM, Stathopulos PB. The mitochondrial calcium uniporter: Balancing tumourigenic and anti-tumourigenic responses. J Physiol 2024; 602:3315-3339. [PMID: 38857425 DOI: 10.1113/jp285515] [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: 12/26/2023] [Accepted: 05/20/2024] [Indexed: 06/12/2024] Open
Abstract
Increased malignancy and poor treatability associated with solid tumour cancers have commonly been attributed to mitochondrial calcium (Ca2+) dysregulation. The mitochondrial Ca2+ uniporter complex (mtCU) is the predominant mode of Ca2+ uptake into the mitochondrial matrix. The main components of mtCU are the pore-forming mitochondrial Ca2+ uniporter (MCU) subunit, MCU dominant-negative beta (MCUb) subunit, essential MCU regulator (EMRE) and the gatekeeping mitochondrial Ca2+ uptake 1 and 2 (MICU1 and MICU2) proteins. In this review, we describe mtCU-mediated mitochondrial Ca2+ dysregulation in solid tumour cancer types, finding enhanced mtCU activity observed in colorectal cancer, breast cancer, oral squamous cell carcinoma, pancreatic cancer, hepatocellular carcinoma and embryonal rhabdomyosarcoma. By contrast, decreased mtCU activity is associated with melanoma, whereas the nature of mtCU dysregulation remains unclear in glioblastoma. Furthermore, we show that numerous polymorphisms associated with cancer may alter phosphorylation sites on the pore forming MCU and MCUb subunits, which cluster at interfaces with EMRE. We highlight downstream/upstream biomolecular modulators of MCU and MCUb that alter mtCU-mediated mitochondrial Ca2+ uptake and may be used as biomarkers or to aid in the development of novel cancer therapeutics. Additionally, we provide an overview of the current small molecule inhibitors of mtCU that interact with the Asp residue of the critical Asp-Ile-Met-Glu motif or through other allosteric regulatory mechanisms to block Ca2+ permeation. Finally, we describe the relationship between MCU- and MCUb-mediating microRNAs and mitochondrial Ca2+ uptake that should be considered in the discovery of new treatment approaches for cancer.
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Affiliation(s)
- Danielle M Colussi
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
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13
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Hong Q, Zhu S, Yu Y, Ren Y, Jin L, Wang H, Zhang H, Guo K. The emerging role of mtDNA release in sepsis: Current evidence and potential therapeutic targets. J Cell Physiol 2024. [PMID: 38888012 DOI: 10.1002/jcp.31331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/20/2024]
Abstract
Sepsis is a systemic inflammatory reaction caused by infection, and severe sepsis can develop into septic shock, eventually leading to multiorgan dysfunction and even death. In recent years, studies have shown that mitochondrial damage is closely related to the occurrence and development of sepsis. Recent years have seen a surge in concern over mitochondrial DNA (mtDNA), as anomalies in this material can lead to cellular dysfunction, disruption of aerobic respiration, and even death of the cell. In this review, we discuss the latest findings on the mechanisms of mitochondrial damage and the molecular mechanisms controlling mitochondrial mtDNA release. We also explored the connection between mtDNA misplacement and inflammatory activation. Additionally, we propose potential therapeutic targets of mtDNA for sepsis treatment.
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Affiliation(s)
- Qianya Hong
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Shuainan Zhu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Ying Yu
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Yun Ren
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Lin Jin
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Huilin Wang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Hao Zhang
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
| | - Kefang Guo
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China
- Shanghai Key Laboratory of Perioperative Stress and Protection, Shanghai, China
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14
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Hou Y, Fan F, Xie N, Zhang Y, Wang X, Meng X. Rhodiola crenulata alleviates hypobaric hypoxia-induced brain injury by maintaining BBB integrity and balancing energy metabolism dysfunction. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155529. [PMID: 38503156 DOI: 10.1016/j.phymed.2024.155529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 02/25/2024] [Accepted: 03/08/2024] [Indexed: 03/21/2024]
Abstract
BACKGROUND/PURPOSE Rhodiola crenulata (Hook. f. et Thoms.) H. Ohba (R. crenulate), a famous and characteristic Tibetan medicine, has been demonstrated to exert an outstanding brain protection role in the treatment of high-altitude hypoxia disease. However, the metabolic effects of R. crenulate on high-altitude hypoxic brain injury (HHBI) are still incompletely understood. Herein, the anti-hypoxic effect and associated mechanisms of R. crenulate were explored through both in vivo and in vitro experiments. STUDY DESIGN/METHODS The mice model of HHBI was established using an animal hypobaric and hypoxic chamber. R. crenulate extract (RCE, 0.5, 1.0 and 2.0 g/kg) and salidroside (Sal, 25, 50 and 100 mg/kg) was given by gavage for 7 days. Pathological changes and neuronal apoptosis of mice hippocampus and cortex were evaluated using H&E and TUNEL staining, respectively. The effects of RCE and Sal on the permeability of blood brain barrier (BBB) were detected by Evans blue staining and NIR-II fluorescence imaging. Meanwhile, the ultrastructural BBB and cerebrovascular damages were observed using a transmission electron microscope (TEM). The levels of tight junction proteins Claudin-1, ZO-1 and occludin were detected by immunofluorescence. Additionally, the metabolites in mice serum and brain were determined using UHPLC-MS and MALDI-MSI analysis. The cell viability of Sal on hypoxic HT22 cells induced by CoCl2 was investigated by cell counting kit-8. The contents of LDH, MDA, SOD, GSH-PX and SDH were detected by using commercial biochemical kits. Meanwhile, intracellular ROS, Ca2+ and mitochondrial membrane potential were determined by corresponding specific labeled probes. The intracellular metabolites of HT22 cells were performed by the targeted metabolomics analysis of the Q300 kit. The cell apoptosis and necrosis were examined by YO-PRO-1/PI, Annexin V/PI and TUNEL staining. In addition, mitochondrial morphology was tested by Mito-tracker red with confocal microscopy and TEM. Real-time ATP production, oxygen consumption rate, and proton efflux rate were measured using a Seahorse analyzer. Subsequently, MCU, OPA1, p-Drp1ser616, p-AMPKα, p-AMPKβ and Sirt1 were determined by immunofluorescent and western blot analyses. RESULTS The results demonstrated that R. crenulate and Sal exert anti-hypoxic brain protection from inhibiting neuronal apoptosis, maintaining BBB integrity, increasing tight junction protein Claudin-1, ZO-1 and occludin and improving mitochondrial morphology and function. Mechanistically, R. crenulate and Sal alleviated HHBI by enhancing the tricarboxylic acid cycle to meet the demand of energy of brain. Additionally, experiments in vitro confirmed that Sal could ameliorate the apoptosis of HT22 cells, improve mitochondrial morphology and energy metabolism by enhancing mitochondrial respiration and glycolysis. Meanwhile, Sal-mediated MCU inhibited the activation of Drp1 and enhanced the expression of OPA1 to maintain mitochondrial homeostasis, as well as activation of AMPK and Sirt1 to enhance ATP production. CONCLUSION Collectively, the findings suggested that RCE and Sal may afford a protective intervention in HHBI through maintaining BBB integrity and improving energy metabolism via balancing MCU-mediated mitochondrial homeostasis by activating the AMPK/Sirt1 signaling pathway.
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Affiliation(s)
- Ya Hou
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy/School of Modern Chinese Medicine Industry, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China
| | - Fuhan Fan
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy/School of Modern Chinese Medicine Industry, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China
| | - Na Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy/School of Modern Chinese Medicine Industry, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China
| | - Yi Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy/School of Modern Chinese Medicine Industry, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China
| | - Xiaobo Wang
- Innovative Institute of Chinese Medicine and Pharmacy/Academy for Interdiscipline, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Meishan Hospital of Chengdu University of Traditional Chinese Medicine, Meishan, 620010, China.
| | - Xianli Meng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy/School of Modern Chinese Medicine Industry, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, PR China; Innovative Institute of Chinese Medicine and Pharmacy/Academy for Interdiscipline, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Meishan Hospital of Chengdu University of Traditional Chinese Medicine, Meishan, 620010, China.
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15
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Noble M, Colussi DM, Junop M, Stathopulos PB. The MCU and MCUb amino-terminal domains tightly interact: mechanisms for low conductance assembly of the mitochondrial calcium uniporter complex. iScience 2024; 27:109699. [PMID: 38706857 PMCID: PMC11068563 DOI: 10.1016/j.isci.2024.109699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 02/12/2024] [Accepted: 04/05/2024] [Indexed: 05/07/2024] Open
Abstract
The mitochondrial calcium (Ca2+) uniporter (MCU) complex is regulated via integration of the MCU dominant negative beta subunit (MCUb), a low conductance paralog of the main MCU pore forming protein. The MCU amino (N)-terminal domain (NTD) also modulates channel function through cation binding to the MCU regulating acidic patch (MRAP). MCU and MCUb have high sequence similarities, yet the structural and functional roles of MCUb-NTD remain unknown. Here, we report that MCUb-NTD exhibits α-helix/β-sheet structure with a high thermal stability, dependent on protein concentration. Remarkably, MCU- and MCUb-NTDs heteromerically interact with ∼nM affinity, increasing secondary structure and stability and structurally perturbing MRAP. Further, we demonstrate MCU and MCUb co-localization is suppressed upon NTD deletion concomitant with increased mitochondrial Ca2+ uptake. Collectively, our data show that MCU:MCUb NTD tight interactions are promoted by enhanced regular structure and stability, augmenting MCU:MCUb co-localization, lowering mitochondrial Ca2+ uptake and implicating an MRAP-sensing mechanism.
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Affiliation(s)
- Megan Noble
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A5C1, Canada
| | - Danielle M. Colussi
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A5C1, Canada
| | - Murray Junop
- Department of Biochemistry, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A5C1, Canada
| | - Peter B. Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON N6A5C1, Canada
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16
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Gao J, Mang Q, Liu Y, Sun Y, Xu G. Integrated mRNA and miRNA analysis reveals the regulatory network of oxidative stress and inflammation in Coilia nasus brains during air exposure and salinity mitigation. BMC Genomics 2024; 25:446. [PMID: 38714962 PMCID: PMC11075292 DOI: 10.1186/s12864-024-10327-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 04/19/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Air exposure is an inevitable source of stress that leads to significant mortality in Coilia nasus. Our previous research demonstrated that adding 10‰ NaCl to aquatic water could enhance survival rates, albeit the molecular mechanisms involved in air exposure and salinity mitigation remained unclear. Conversely, salinity mitigation resulted in decreased plasma glucose levels and improved antioxidative activity. To shed light on this phenomenon, we characterized the transcriptomic changes in the C. nasus brain upon air exposure and salinity mitigation by integrated miRNA-mRNA analysis. RESULTS The plasma glucose level was elevated during air exposure, whereas it decreased during salinity mitigation. Antioxidant activity was suppressed during air exposure, but was enhanced during salinity mitigation. A total of 629 differentially expressed miRNAs (DEMs) and 791 differentially expressed genes (DEGs) were detected during air exposure, while 429 DEMs and 1016 DEGs were identified during salinity mitigation. GO analysis revealed that the target genes of DEMs and DEGs were enriched in biological process and cellular component during air exposure and salinity mitigation. KEGG analysis revealed that the target genes of DEMs and DEGs were enriched in metabolism. Integrated analysis showed that 24 and 36 predicted miRNA-mRNA regulatory pairs participating in regulating glucose metabolism, Ca2+ transport, inflammation, and oxidative stress. Interestingly, most of these miRNAs were novel miRNAs. CONCLUSION In this study, substantial miRNA-mRNA regulation pairs were predicted via integrated analysis of small RNA sequencing and RNA-Seq. Based on predicted miRNA-mRNA regulation and potential function of DEGs, miRNA-mRNA regulatory network involved in glucose metabolism and Ca2+ transport, inflammation, and oxidative stress in C. nasus brain during air exposure and salinity mitigation. They regulated the increased/decreased plasma glucose and inhibited/promoted antioxidant activity during air exposure and salinity mitigation. Our findings would propose novel insights to the mechanisms underlying fish responses to air exposure and salinity mitigation.
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Affiliation(s)
- Jun Gao
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Center, Ministry of Agriculture, Chinese Academy of Fishery Sciences, Wuxi, Jiangsu, 214081, China
| | - Qi Mang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Center, Ministry of Agriculture, Chinese Academy of Fishery Sciences, Wuxi, Jiangsu, 214081, China
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu, 214081, China
| | - Yuqian Liu
- College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China
| | - Yi Sun
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Center, Ministry of Agriculture, Chinese Academy of Fishery Sciences, Wuxi, Jiangsu, 214081, China
| | - Gangchun Xu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Freshwater Fisheries Research Center, Ministry of Agriculture, Chinese Academy of Fishery Sciences, Wuxi, Jiangsu, 214081, China.
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi, Jiangsu, 214081, China.
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17
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Qin P, Sun Y, Li L. Mitochondrial dysfunction in chronic neuroinflammatory diseases (Review). Int J Mol Med 2024; 53:47. [PMID: 38577947 PMCID: PMC10999227 DOI: 10.3892/ijmm.2024.5371] [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: 12/01/2023] [Accepted: 03/14/2024] [Indexed: 04/06/2024] Open
Abstract
Chronic neuroinflammation serves a key role in the onset and progression of neurodegenerative disorders. Mitochondria serve as central regulators of neuroinflammation. In addition to providing energy to cells, mitochondria also participate in the immunoinflammatory response of neurodegenerative disorders including Alzheimer's disease, Parkinson's disease, multiple sclerosis and epilepsy, by regulating processes such as cell death and inflammasome activation. Under inflammatory conditions, mitochondrial oxidative stress, epigenetics, mitochondrial dynamics and calcium homeostasis imbalance may serve as underlying regulatory mechanisms for these diseases. Therefore, investigating mechanisms related to mitochondrial dysfunction may result in therapeutic strategies against chronic neuroinflammation and neurodegeneration. The present review summarizes the mechanisms of mitochondria in chronic neuroinflammatory diseases and the current treatment approaches that target mitochondrial dysfunction in these diseases.
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Affiliation(s)
- Pei Qin
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Ye Sun
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Liya Li
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116000, P.R. China
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18
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Muroya S, Horiuchi Y, Iguchi K, Higuchi T, Sakamoto S, Ojima K, Matsukawa K. Depth of Interbreed Difference in Postmortem Bovine Muscle Determined by CE-FT/MS and LC-FT/MS Metabolomics. Metabolites 2024; 14:261. [PMID: 38786738 PMCID: PMC11123161 DOI: 10.3390/metabo14050261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 04/24/2024] [Accepted: 04/29/2024] [Indexed: 05/25/2024] Open
Abstract
Japanese Brown (JBR) cattle have moderately marbled beef compared to the highly marbled beef of Japanese Black (JBL) cattle; however, their skeletal muscle properties remain poorly characterized. To unveil interbreed metabolic differences over the previous results, we explored the metabolome network changes before and after postmortem 7-day aging in the trapezius muscle of the two cattle breeds by employing a deep and high-coverage metabolomics approach. Using both capillary electrophoresis (CE) and ultra-high-performance liquid chromatography (UHPLC)-Fourier transform mass spectrometry (FT/MS), we detected 522 and 384 annotated peaks, respectively, across all muscle samples. The CE-based results showed that the cattle were clearly separated by breed and postmortem age in multivariate analyses. The metabolism related to glutathione, glycolysis, vitamin K, taurine, and arachidonic acid was enriched with differentially abundant metabolites in aged muscles, in addition to amino acid (AA) metabolisms. The LC-based results showed that the levels of bile-acid-related metabolites, such as tauroursodeoxycholic acid (TUDCA), were high in fresh JBR muscle and that acylcarnitines were enriched in aged JBR muscle, compared to JBL muscle. Postmortem aging resulted in an increase in fatty acids and a decrease in acylcarnitine in the muscles of both cattle breeds. In addition, metabolite set enrichment analysis revealed that JBR muscle was distinctive in metabolisms related to pyruvate, glycerolipid, cardiolipin, and mitochondrial energy production, whereas the metabolisms related to phosphatidylethanolamine, nucleotide triphosphate, and AAs were characteristic of JBL. This suggests that the interbreed differences in postmortem trapezius muscle are associated with carnitine/acylcarnitine transport, β-oxidation, tricarboxylic acid cycle, and mitochondrial membrane stability, in addition to energy substrate and AA metabolisms. These interbreed differences may characterize beef quality traits such as the flavor intensity and oxidative stability.
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Affiliation(s)
- Susumu Muroya
- Division of Animal Products Research, NARO Institute of Livestock and Grassland Science (NILGS), Tsukuba 305-0901, Ibaraki, Japan
- Faculty of Veterinary Medicine, Kagoshima University, Korimoto 890-0065, Kagoshima, Japan
| | - Yuta Horiuchi
- Human Metabolome Technologies Inc., Tsuruoka 997-0052, Yamagata, Japan
| | - Kazuki Iguchi
- Human Metabolome Technologies Inc., Tsuruoka 997-0052, Yamagata, Japan
| | - Takuma Higuchi
- Science Research Center, Kochi University, Nankoku 783-8505, Kochi, Japan
| | - Shuji Sakamoto
- Science Research Center, Kochi University, Nankoku 783-8505, Kochi, Japan
| | - Koichi Ojima
- Division of Animal Products Research, NARO Institute of Livestock and Grassland Science (NILGS), Tsukuba 305-0901, Ibaraki, Japan
| | - Kazutsugu Matsukawa
- Department of Agriculture and Marine Science, Kochi University, Nankoku 783-8502, Kochi, Japan
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Danylovych H, Danylovych Y, Chunikhin A, Cherenok S, Kalchenko V, Kosterin S. Use of thiacalix[4]arene C-1193 for a directed influence on the functional activity of mitochondria and simulation of this process using a Petri nets. BIOTECHNOLOGIA 2024; 105:69-81. [PMID: 38633893 PMCID: PMC11020151 DOI: 10.5114/bta.2024.135643] [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: 06/22/2023] [Revised: 10/19/2023] [Accepted: 11/07/2023] [Indexed: 04/19/2024] Open
Abstract
In molecular biological studies, considerable attention is paid to macrocyclic nanoscale compounds known as calix[4]arenes. An imperative concern in biochemical membranology and molecular biotechnology is the exploration of effectors capable of modifying the intensity of redox reactions within the inner mitochondrial membrane and influencing the activity of its Ca2+ transport systems. The simulation model development is relevant to formalize and generalize the experimental data and assess the conformity of experimental results with theoretical predictions. Experiments were carried out on a suspension of isolated rat myometrial mitochondria. The synthesized thiacalix[4]arene C-1193, containing four sulfur atoms, was employed. Demonstrations of time-dependent and concentration-dependent (0.01-10 μM) inhibition of Ca2+ accumulation and reactive oxygen species (ROS) formation by mitochondria in the presence of C-1193 were observed. While C-1193 inhibited the oxidation of NADH and FADH2, it did not induce mitochondrial swelling. The thiacalix[4]arene also inhibited the synthesis of nitric oxide, with a Ki of 5.5 ± 1.7 nM, positioning it as a high-affinity blocker of endogenous NO generation in mitochondria. These results are the basis for the possible application of the synthesized thiacalix[4]arene as a tool in researching biochemical processes in mitochondria. A simulation model employing functional hybrid Petri nets was developed, reproducing the functional activity of mitochondria, including simultaneous NADH oxidation, ROS formation, NO synthesis, and Ca2+ accumulation. The derived equations formalize and describe the time dependencies of the listed processes in the medium under the influence of thiacalix[4]arene C-1193.
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Affiliation(s)
- Hanna Danylovych
- Palladin Institute of Biochemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Yurii Danylovych
- Palladin Institute of Biochemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Alexander Chunikhin
- Palladin Institute of Biochemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Sergiy Cherenok
- Institute of Organic Chemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Vitaly Kalchenko
- Institute of Organic Chemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
| | - Sergiy Kosterin
- Palladin Institute of Biochemistry, National Academy of Science of Ukraine, Kyiv, Ukraine
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Wang J, Jiang J, Hu H, Chen L. MCU complex: Exploring emerging targets and mechanisms of mitochondrial physiology and pathology. J Adv Res 2024:S2090-1232(24)00075-4. [PMID: 38417574 DOI: 10.1016/j.jare.2024.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/16/2024] [Accepted: 02/17/2024] [Indexed: 03/01/2024] Open
Abstract
BACKGROUND Globally, the onset and progression of multiple human diseases are associated with mitochondrial dysfunction and dysregulation of Ca2+ uptake dynamics mediated by the mitochondrial calcium uniporter (MCU) complex, which plays a key role in mitochondrial dysfunction. Despite relevant studies, the underlying pathophysiological mechanisms have not yet been fully elucidated. AIM OF REVIEW This article provides an in-depth analysis of the current research status of the MCU complex, focusing on its molecular composition, regulatory mechanisms, and association with diseases. In addition, we conducted an in-depth analysis of the regulatory effects of agonists, inhibitors, and traditional Chinese medicine (TCM) monomers on the MCU complex and their application prospects in disease treatment. From the perspective of medicinal chemistry, we conducted an in-depth analysis of the structure-activity relationship between these small molecules and MCU and deduced potential pharmacophores and binding pockets. Simultaneously, key structural domains of the MCU complex in Homo sapiens were identified. We also studied the functional expression of the MCU complex in Drosophila, Zebrafish, and Caenorhabditis elegans. These analyses provide a basis for exploring potential treatment strategies targeting the MCU complex and provide strong support for the development of future precision medicine and treatments. KEY SCIENTIFIC CONCEPTS OF REVIEW The MCU complex exhibits varying behavior across different tissues and plays various roles in metabolic functions. It consists of six MCU subunits, an essential MCU regulator (EMRE), and solute carrier 25A23 (SLC25A23). They regulate processes, such as mitochondrial Ca2+ (mCa2+) uptake, mitochondrial adenosine triphosphate (ATP) production, calcium dynamics, oxidative stress (OS), and cell death. Regulation makes it a potential target for treating diseases, especially cardiovascular diseases, neurodegenerative diseases, inflammatory diseases, metabolic diseases, and tumors.
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Affiliation(s)
- Jin Wang
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China
| | - Jinyong Jiang
- Department of Pharmacy, The First Affiliated Hospital of Jishou University, Jishou 416000, China
| | - Haoliang Hu
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China; College of Medicine, Hunan University of Arts and Science, Changde 415000, China.
| | - Linxi Chen
- Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, School of Pharmaceutical Science, Hengyang Medical College, University of South China, Hengyang 421001, China.
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Xiao H, Ma L, Ding J, Wang H, Bi X, Tan F, Piao W. Mitochondrial Calcium Uniporter (MCU) that Modulates Mitochondrial Calcium Uptake and Facilitates Endometrial Cancer Progression through Interaction with VDAC1. Curr Cancer Drug Targets 2024; 24:354-367. [PMID: 37702230 DOI: 10.2174/1568009624666230912095526] [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: 12/21/2022] [Revised: 07/05/2023] [Accepted: 07/11/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND Although endometrial cancer represents a frequently diagnosed malignancy of the female reproductive tract, we know very little about the factors that control endometrial cancer. OBJECTIVE Our study was presented to investigate the function of MCU in endometrial tumorigenesis and the molecular mechanisms involved. MATERIALS AND METHODS A total of 94 endometrial cancer patients were recruited into our cohort. MCU and VDAC1 expression was examined in tumor and normal tissues via immunohistochemistry and immunofluorescence. Associations of MCU and VDAC1 expression with clinicopathological characteristics were evaluated. After transfection with shRNA targeting MCU or full-length MCU plasmids, clone formation, wound healing, transwell and MitoTracker Red staining were separately presented in Ishikawa and RL95-2 cells. Moreover, Western blotting or immunofluorescence was utilized to examine the expression of MCU, VDAC1, Na+/Ca2+/Li+ exchanger (NCLX), and β-catenin under VDAC1 knockdown and/or MCU overexpression or knockdown. RESULTS MCU and VDAC1 expression were prominently up-regulated in endometrial cancer tissues and were significantly associated with histological grade, depth of myometrial invasion and lymph node status. MCU up-regulation enhanced clone formation, migration, and mitochondrial activity of endometrial cancer cells. The opposite results were investigated when MCU was silenced. MCU or VDAC1 silencing reduced the expression of MCU, VDAC1, NCLX, and β-catenin. Moreover, VDAC1 knockdown alleviated the promoting effect of MCU overexpression on the above proteins. CONCLUSION This investigation demonstrated that MCU-induced mitochondrial calcium uptake plays a critical role in endometrial tumorigenesis through interaction with VDAC1.
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Affiliation(s)
- Hongyan Xiao
- Department of Pathology, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
| | - Lijun Ma
- School of Electrical and Information Engineering, Department of Medical Imaging, North Minzu University, Yinchuan, 750021, Ningxia Hui Autonomous Region, China
| | - Jie Ding
- Medical Imaging Center, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
| | - Honghong Wang
- Department of Pathology, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
| | - Xiaofang Bi
- Department of Pathology, The First People's Hospital of Yinchuan, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
| | - Fengmei Tan
- Department of Pathology, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
| | - Wenhua Piao
- Clinical Medical Laboratory Center, People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, 750001, Ningxia Hui Autonomous Region, China
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Zhu M, Yan M, Musa M, Li Y, Zhang Y, Zou X. MicroRNA-129-1-3p protects chicken granulosa cells from cadmium-induced apoptosis by down-regulating the MCU-mediated Ca 2+ signaling pathway. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 269:115906. [PMID: 38176135 DOI: 10.1016/j.ecoenv.2023.115906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 01/06/2024]
Abstract
Cadmium (Cd) is known as a female reproductive toxicant. Our previous study has shown that Cd can influence the proliferation and cell cycle of granulosa cells and induce apoptosis. MicroRNAs (miRNAs) play an important role in the regulation of Cd-induced granulosa cell damage in chickens. However, the mechanism remains unclear. In this study, we investigated the mechanisms by which microRNA-129-1-3p (miR-129-1-3p) regulates Cd-induced cytotoxicity in chicken granulosa cells. As anticipated, exposure to Cd resulted in the induction of oxidative stress in granulosa cells, accompanied by the downregulation of antioxidant molecules and/or enzymes of Nrf2, Mn-SOD, Cu-Zn SOD and CAT, and the upregulation of Keap1, GST, GSH-Px, GCLM, MDA, hydrogen peroxide and mitochondrial reactive oxygen species (mtROS). Further studies found that Cd exposure causes mitochondrial calcium ions (Ca2+) overload, provoking mitochondrial damage and apoptosis by upregulating IP3R, GRP75, VDAC1, MCU, CALM1, MFF, caspase 3, and caspase 9 gene and/or protein expressions and mitochondrial Ca2+ levels, while downregulating NCX1, NCLX and MFN2 gene and/or protein expressions and mitochondrial membrane potential (MMP). The Ca2+ chelator BAPTA-AM or the MCU inhibitor MCU-i4 significantly rescued Cd-induced mitochondrial dysfunction, thereby attenuating apoptosis. Additionally, a luciferase reported assay and western blot analysis confirmed that miR-129-1-3p directly target MCU. MiR-129-1-3p overexpression almost completely inhibited protein expression of MCU, increased the gene and protein expressions of NCLX and MFN2 downregulated by Cd, and attenuated mitochondrial Ca2+ overload, MMP depression and mitochondria damage induced by Cd. Moreover, the overexpression of miR-129-1-3p led to a reduction in mtROS and cell apoptosis levels, and a suppression of the gene and protein expressions of caspase 3 and caspase 9. As above, these results provided the evidence that IP3R-MCU signaling pathway activated by Cd plays a significant role in inducing mitochondrial Ca2+ overload, mitochondrial damage, and apoptosis. MiR-129-1-3p exerts a protective effect against Cd-induced granulosa cell apoptosis through the direct inhibition of MCU expression in the ovary of laying hens.
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Affiliation(s)
- Mingkun Zhu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China.
| | - Ming Yan
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Maierhaba Musa
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Yurong Li
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Yeshun Zhang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, School of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, The Sericultural Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Xiaoting Zou
- Key Laboratory of Animal Feed and Nutrition of Zhejiang Province, Key Laboratory of Animal Nutrition and Feed Science in East China, Ministry of Agriculture, The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
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Babich LG, Shlykov SG, Bavelska-Somak AO, Zagoruiko AG, Horid'ko TM, Kosiakova HV, Hula NM, Kosterin SO. Extramitochondrial ATP as [Ca 2+] m and cardiolipin content regulator. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184213. [PMID: 37582415 DOI: 10.1016/j.bbamem.2023.184213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/07/2023] [Accepted: 08/09/2023] [Indexed: 08/17/2023]
Abstract
An ATP-induced increase of [Ca2+]m in myometrium mitochondria matrix at the absence of exogenous Ca2+ was shown. An ATP-induced increase of Сa2+ efflux from mitochondria ([Сa2+]o) has also been shown. Mitochondria membranes were polarized upon incubation in both Mg2+- and Mg2+,ATP-medium. Cardiolipin (CL) content in mitochondria membranes decreased upon incubation of organelles in Mg2+,ATP-medium as compared to Mg2+-medium. It was suggested that ATP could play the role of a signaling molecule regulating the Ca2+ exchange in the mitochondria.
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Affiliation(s)
- Lidiya G Babich
- Department of Muscle Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine.
| | - Sergiy G Shlykov
- Department of Muscle Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine.
| | - Anastasia O Bavelska-Somak
- Department of Muscle Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine
| | - Anastasia G Zagoruiko
- Department of Muscle Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine
| | - Tetyana M Horid'ko
- Department of Lipid Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine
| | - Halyna V Kosiakova
- Department of Lipid Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine
| | - Nadiya M Hula
- Department of Lipid Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine
| | - Sergiy O Kosterin
- Department of Muscle Biochemistry, Palladin Institute of Biochemistry, NAS of Ukraine, 9, Leontovich Str., Kyiv 01054, Ukraine.
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Lu N, Zhu JF, Lv HF, Zhang HP, Wang PL, Yang JJ, Wang XW. Modulation of oxidized low-density lipoprotein-affected macrophage efferocytosis by mitochondrial calcium uniporter in a murine model. Immunol Lett 2023; 263:14-24. [PMID: 37689315 DOI: 10.1016/j.imlet.2023.09.003] [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: 04/06/2023] [Revised: 09/04/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
OBJECTIVE Efferocytosis dysfunction contributes to the progression and rupture of atherosclerotic plaques. Efferocytosis is crucially modulated by intracytoplasmic Ca2+, and mitochondrial calcium uniporter (MCU) complex proteins serve as key channels for regulating Ca2+ concentration. Therefore, it was speculated that MCU may affect the development of atherosclerosis (AS) by regulating efferocytosis. In the present study, we aimed to investigate whether MCU could affect foam cell formation by regulating efferocytosis. METHODS We stimulated primary macrophages (Møs) using oxidized low-density lipoprotein (ox-LDL) to mimic the atherosclerotic microenvironment and treated them with Ru360, an MCU-specific inhibitor, and UNC1062, an inhibitor of efferocytosis. Additionally, we conducted double staining to determine the Mø efferocytosis rate. We measured the expression of MCU complexes and efferocytosis-associated proteins using western blotting (WB) and real-time quantitative polymerase chain reaction (RT-qPCR), respectively. In addition, we separately detected the Ca2+ level in the cytoplasm and mitochondria (MT) using Fluo-4 AM and Rhod-2 methods. We separately determined the reactive oxygen species (ROS) level in cytoplasm and MT using dichlorodihydrofluorescein diacetate (DCFH-DA) fluorescent probing method and Mito-SOXTM superoxide indicator staining. Additionally, we conducted the enzyme-linked immunosorbent assay (ELISA) to detect the production of interleukin-6 (IL-6), interleukin-18 (IL-18), interleukin-1β (IL-1β), and tumor necrosis factor-alpha (TNF-α). Oil Red O staining was performed to measure cytoplasmic lipid levels. RESULTS Ru360 attenuated ox-LDL-induced efferocytosis dysfunction, and attenuated the upregulation of MCU and MCUR1 induced by ox-LDL, and meanwhile attenuated the downregulation of MCUb induced by ox-LDL. Ru360 attenuated the decrease of intracytoplasmic Ca2+ concentration induced by ox- LDL, Ru360 also attenuated the ROS production induced by ox- LDL, attenuated the release of IL-6, IL-18, IL-1β, and TNF-α induced by ox- LDL, and attenuated the increase of intracytoplasmic lipid content induced by ox-LDL. UNC1062 attenuated the effects of Ru360 in reducing inflammatory cytokines and intracytoplasmic lipid content. CONCLUSIONS In this study, we found that MCU inhibition modulated intracytoplasmic Ca2+ concentration, improved impaired Mø efferocytosis, and reduced ROS generation. Macrophage efferocytosis removed apoptotic cells and prevented the release of inflammatory factor and foam cell formation, and this can be a potential new therapeutic target for alleviating atherosclerosis.
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Affiliation(s)
- Na Lu
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China.
| | - Jun-Fan Zhu
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - He-Fan Lv
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Hai-Peng Zhang
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Peng-le Wang
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Jing-Jing Yang
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Xian-Wei Wang
- Henan Key Laboratory of Medical Tissue Regeneration, School of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
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Zhao BH, Ruze A, Zhao L, Li QL, Tang J, Xiefukaiti N, Gai MT, Deng AX, Shan XF, Gao XM. The role and mechanisms of microvascular damage in the ischemic myocardium. Cell Mol Life Sci 2023; 80:341. [PMID: 37898977 PMCID: PMC11073328 DOI: 10.1007/s00018-023-04998-z] [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: 05/22/2023] [Revised: 09/08/2023] [Accepted: 10/02/2023] [Indexed: 10/31/2023]
Abstract
Following myocardial ischemic injury, the most effective clinical intervention is timely restoration of blood perfusion to ischemic but viable myocardium to reduce irreversible myocardial necrosis, limit infarct size, and prevent cardiac insufficiency. However, reperfusion itself may exacerbate cell death and myocardial injury, a process commonly referred to as ischemia/reperfusion (I/R) injury, which primarily involves cardiomyocytes and cardiac microvascular endothelial cells (CMECs) and is characterized by myocardial stunning, microvascular damage (MVD), reperfusion arrhythmia, and lethal reperfusion injury. MVD caused by I/R has been a neglected problem compared to myocardial injury. Clinically, the incidence of microvascular angina and/or no-reflow due to ineffective coronary perfusion accounts for 5-50% in patients after acute revascularization. MVD limiting drug diffusion into injured myocardium, is strongly associated with the development of heart failure. CMECs account for > 60% of the cardiac cellular components, and their role in myocardial I/R injury cannot be ignored. There are many studies on microvascular obstruction, but few studies on microvascular leakage, which may be mainly due to the lack of corresponding detection methods. In this review, we summarize the clinical manifestations, related mechanisms of MVD during myocardial I/R, laboratory and clinical examination means, as well as the research progress on potential therapies for MVD in recent years. Better understanding the characteristics and risk factors of MVD in patients after hemodynamic reconstruction is of great significance for managing MVD, preventing heart failure and improving patient prognosis.
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Affiliation(s)
- Bang-Hao Zhao
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Amanguli Ruze
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Ling Zhao
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Qiu-Lin Li
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Jing Tang
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Nilupaer Xiefukaiti
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Min-Tao Gai
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - An-Xia Deng
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Xue-Feng Shan
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China
| | - Xiao-Ming Gao
- State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asian, Department of Cardiology, the First Affiliated Hospital of Xinjiang Medical University, Clinical Medical Research Institute of Xinjiang Medical University, 137 Liyushan South Road, Urumqi, 830054, China.
- Xinjiang Key Laboratory of Medical Animal Model Research, Urumqi, China.
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Arumugam MK, Gopal T, Kalari Kandy RR, Boopathy LK, Perumal SK, Ganesan M, Rasineni K, Donohue TM, Osna NA, Kharbanda KK. Mitochondrial Dysfunction-Associated Mechanisms in the Development of Chronic Liver Diseases. BIOLOGY 2023; 12:1311. [PMID: 37887021 PMCID: PMC10604291 DOI: 10.3390/biology12101311] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/15/2023] [Accepted: 09/25/2023] [Indexed: 10/28/2023]
Abstract
The liver is a major metabolic organ that performs many essential biological functions such as detoxification and the synthesis of proteins and biochemicals necessary for digestion and growth. Any disruption in normal liver function can lead to the development of more severe liver disorders. Overall, about 3 million Americans have some type of liver disease and 5.5 million people have progressive liver disease or cirrhosis, in which scar tissue replaces the healthy liver tissue. An estimated 20% to 30% of adults have excess fat in their livers, a condition called steatosis. The most common etiologies for steatosis development are (1) high caloric intake that causes non-alcoholic fatty liver disease (NAFLD) and (2) excessive alcohol consumption, which results in alcohol-associated liver disease (ALD). NAFLD is now termed "metabolic-dysfunction-associated steatotic liver disease" (MASLD), which reflects its association with the metabolic syndrome and conditions including diabetes, high blood pressure, high cholesterol and obesity. ALD represents a spectrum of liver injury that ranges from hepatic steatosis to more advanced liver pathologies, including alcoholic hepatitis (AH), alcohol-associated cirrhosis (AC) and acute AH, presenting as acute-on-chronic liver failure. The predominant liver cells, hepatocytes, comprise more than 70% of the total liver mass in human adults and are the basic metabolic cells. Mitochondria are intracellular organelles that are the principal sources of energy in hepatocytes and play a major role in oxidative metabolism and sustaining liver cell energy needs. In addition to regulating cellular energy homeostasis, mitochondria perform other key physiologic and metabolic activities, including ion homeostasis, reactive oxygen species (ROS) generation, redox signaling and participation in cell injury/death. Here, we discuss the main mechanism of mitochondrial dysfunction in chronic liver disease and some treatment strategies available for targeting mitochondria.
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Affiliation(s)
- Madan Kumar Arumugam
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Cancer Biology Lab, Centre for Molecular and Nanomedical Sciences, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India
| | - Thiyagarajan Gopal
- Centre for Laboratory Animal Technology and Research, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (T.G.); (L.K.B.)
| | | | - Lokesh Kumar Boopathy
- Centre for Laboratory Animal Technology and Research, Sathyabama Institute of Science and Technology, Chennai 600119, Tamil Nadu, India; (T.G.); (L.K.B.)
| | - Sathish Kumar Perumal
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Murali Ganesan
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Karuna Rasineni
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Terrence M. Donohue
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA;
| | - Natalia A. Osna
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Kusum K. Kharbanda
- Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, NE 68105, USA; (M.K.A.); (S.K.P.); (M.G.); (N.A.O.)
- Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA;
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Abstract
PURPOSE OF REVIEW Platelet mitochondrial dysfunction is both caused by, as well as a source of oxidative stress. Oxidative stress is a key hallmark of metabolic disorders such as dyslipidemia and diabetes, which are known to have higher risks for thrombotic complications. RECENT FINDINGS Increasing evidence supports a critical role for platelet mitochondria beyond energy production and apoptosis. Mitochondria are key regulators of reactive oxygen species and procoagulant platelets, which both contribute to pathological thrombosis. Studies targeting platelet mitochondrial pathways have reported promising results suggesting antithrombotic effects with limited impact on hemostasis in animal models. SUMMARY Targeting platelet mitochondria holds promise for the reduction of thrombotic complications in patients with metabolic disorders. Future studies should aim at validating these preclinical findings and translate them to the clinic.
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Affiliation(s)
- Abigail Ajanel
- University of Utah Molecular Medicine Program, Salt Lake City, Utah
- Department Pathology, Division of Microbiology and Pathology, University of Utah, Salt Lake City, Utah
| | - Robert A. Campbell
- University of Utah Molecular Medicine Program, Salt Lake City, Utah
- Department Pathology, Division of Microbiology and Pathology, University of Utah, Salt Lake City, Utah
- Department of Internal Medicine, Division of Hematology, University of Utah, Salt Lake City, Utah
| | - Frederik Denorme
- University of Utah Molecular Medicine Program, Salt Lake City, Utah
- Department of Neurology, Division of Vascular Neurology, University of Utah, Salt Lake City, Utah
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Popoiu TA, Maack C, Bertero E. Mitochondrial calcium signaling and redox homeostasis in cardiac health and disease. FRONTIERS IN MOLECULAR MEDICINE 2023; 3:1235188. [PMID: 39086688 PMCID: PMC11285591 DOI: 10.3389/fmmed.2023.1235188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/10/2023] [Indexed: 08/02/2024]
Abstract
The energy demand of cardiomyocytes changes continuously in response to variations in cardiac workload. Cardiac excitation-contraction coupling is fueled primarily by adenosine triphosphate (ATP) production by oxidative phosphorylation in mitochondria. The rate of mitochondrial oxidative metabolism is matched to the rate of ATP consumption in the cytosol by the parallel activation of oxidative phosphorylation by calcium (Ca2+) and adenosine diphosphate (ADP). During cardiac workload transitions, Ca2+ accumulates in the mitochondrial matrix, where it stimulates the activity of the tricarboxylic acid cycle. In this review, we describe how mitochondria internalize and extrude Ca2+, the relevance of this process for ATP production and redox homeostasis in the healthy heart, and how derangements in ion handling cause mitochondrial and cardiomyocyte dysfunction in heart failure.
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Affiliation(s)
- Tudor-Alexandru Popoiu
- Department of Translational Research, Comprehensive Heart Failure Center, University Clinic Würzburg, Würzburg, Germany
- “Victor Babes” University of Medicine and Pharmacy, Timisoara, Romania
| | - Christoph Maack
- Department of Translational Research, Comprehensive Heart Failure Center, University Clinic Würzburg, Würzburg, Germany
| | - Edoardo Bertero
- Department of Translational Research, Comprehensive Heart Failure Center, University Clinic Würzburg, Würzburg, Germany
- Chair of Cardiovascular Disease, Department of Internal Medicine and Specialties, University of Genoa, Genova, Italy
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Espinosa A, Casas M, Jaimovich E. Energy (and Reactive Oxygen Species Generation) Saving Distribution of Mitochondria for the Activation of ATP Production in Skeletal Muscle. Antioxidants (Basel) 2023; 12:1624. [PMID: 37627619 PMCID: PMC10451830 DOI: 10.3390/antiox12081624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/27/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
Exercise produces oxidants from a variety of intracellular sources, including NADPH oxidases (NOX) and mitochondria. Exercise-derived reactive oxygen species (ROS) are beneficial, and the amount and location of these ROS is important to avoid muscle damage associated with oxidative stress. We discuss here some of the evidence that involves ROS production associated with skeletal muscle contraction and the potential oxidative stress associated with muscle contraction. We also discuss the potential role of H2O2 produced after NOX activation in the regulation of glucose transport in skeletal muscle. Finally, we propose a model based on evidence for the role of different populations of mitochondria in skeletal muscle in the regulation of ATP production upon exercise. The subsarcolemmal population of mitochondria has the enzymatic and metabolic components to establish a high mitochondrial membrane potential when fissioned at rest but lacks the capacity to produce ATP. Calcium entry into the mitochondria will further increase the metabolic input. Upon exercise, subsarcolemmal mitochondria will fuse to intermyofibrillar mitochondria and will transfer the mitochondria membrane potential to them. These mitochondria are rich in ATP synthase and will subsequentially produce the ATP needed for muscle contraction in long-term exercise. These events will optimize energy use and minimize mitochondria ROS production.
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Affiliation(s)
- Alejandra Espinosa
- Center for Studies of Exercise, Metabolism and Cancer (CEMC), Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8320000, Chile; (A.E.)
- San Felipe Campus, School of Medicine, Faculty of Medicine, Universidad de Valparaiso, San Felipe 2172972, Chile
| | - Mariana Casas
- Center for Studies of Exercise, Metabolism and Cancer (CEMC), Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8320000, Chile; (A.E.)
| | - Enrique Jaimovich
- Center for Studies of Exercise, Metabolism and Cancer (CEMC), Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago 8320000, Chile; (A.E.)
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Polina I, Mishra J, Cypress MW, Landherr M, Valkov N, Chaput I, Nieto B, Mende U, Zhang P, Jhun BS, O-Uchi J. Mitochondrial Ca 2+ uniporter (MCU) variants form plasma-membrane channels. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.31.551242. [PMID: 37577584 PMCID: PMC10418069 DOI: 10.1101/2023.07.31.551242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
MCU is widely recognized as a responsible gene for encoding a pore-forming subunit of highly mitochondrial-specific and Ca 2+ -selective channel, mitochondrial Ca 2+ uniporter complex (mtCUC). Here, we report a novel short variant derived from the MCU gene (termed MCU-S) which lacks mitochondria-targeted sequence and forms a Ca 2+ - permeable channel outside of mitochondria. MCU-S was ubiquitously expressed in all cell-types/tissues, with particularly high expression in human platelets. MCU-S formed Ca 2+ channels at the plasma membrane, which exhibited similar channel properties to those observed in mtCUC. MCU-S channels at the plasma membrane served as an additional Ca 2+ influx pathway for platelet activation. Our finding is completely distinct from the originally reported MCU gene function and provides novel insights into the molecular basis of MCU variant-dependent cellular Ca 2+ handling.
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ZHU B, YU N, WANG L, TIAN Y, WU M, ZHAO Z. Synergistic effect of schizandrin A and DNase I knockdown on high glucose induced beta cell apoptosis by decreasing intracellular calcium concentration. J TRADIT CHIN MED 2023; 43:661-666. [PMID: 37454250 PMCID: PMC10320450 DOI: 10.19852/j.cnki.jtcm.2023.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/08/2022] [Indexed: 07/18/2023]
Abstract
OBJECTIVE To explore the synergistic effect of deoxyribonuclease I (DNase I) knockdown combined with Schizandrin A (Sch A) in protecting islet beta-cells (β-cells) from apoptosis under high-glucose (HG) conditions. METHODS The concentration of Sch A was detected by Cell Counting Kit-8 (CCK-8). High glucose-cultured rat insulinoma beta cell line (RIN-M5F) cells were treated with Sch A and transfected with DNase I small interfering RNA (siRNA). Cell apoptosis rate and apoptosis-related protein level were examined by flow cytometry and Western blot method respectively. In addition, Na-K-adenosine triphosphatease (Na-K-ATPase) and Ca-Mg-ATPase activity, cell membrane potential, and intracellular Ca concentration was also examined respectively. RESULTS Our study revealed that HG stimulation can cause a significant increase in DNase I level and cell apoptosis rate. However, Sch A combined with DNase I knockdown can significantly decrease the cell apoptosis rate and apoptosis-related protein levels such as BAX ( 0.05) and Caspase-3 ( 0.01). In addition, we also found that the combination of Sch A and DNase I knockdown can dramatically increase cell membrane potential level, Na-K-ATPase, and Ca-Mg-ATPase activity. Meanwhile, intracellular Ca concentration was also found to be significantly decreased by the synergistic effect of Sch A and DNase I knockdown. CONCLUSION Overall, our study reveals a synergistic effect of Sch A and DNase I knockdown in protecting β-cells from HG-induced apoptosis.
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Affiliation(s)
- Bin ZHU
- 1 Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - Ning YU
- 2 Accreditation Center of Traditional Chinese Medicine Physician of National Administration of Traditional Chinese Medicine, Beijing 100120, China
| | - Lei WANG
- 3 Department of Endocrinology, the Third Affiliated Hospital of Beijing University of Chinese Medicine, Beijing 100050, China
| | - Yue TIAN
- 1 Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - Mingfen WU
- 1 Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
| | - Zhigang ZHAO
- 1 Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing 100070, China
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Cheng X, Wang K, Zhao Y, Wang K. Research progress on post-translational modification of proteins and cardiovascular diseases. Cell Death Discov 2023; 9:275. [PMID: 37507372 PMCID: PMC10382489 DOI: 10.1038/s41420-023-01560-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 07/04/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
Cardiovascular diseases (CVDs) such as atherosclerosis, myocardial remodeling, myocardial ischemia-reperfusion (I/R) injury, heart failure, and oxidative stress are among the greatest threats to human health worldwide. Cardiovascular pathogenesis has been studied for decades, and the influence of epigenetic changes on CVDs has been extensively studied. Post-translational modifications (PTMs), including phosphorylation, glycosylation, methylation, acetylation, ubiquitination, ubiquitin-like and nitrification, play important roles in the normal functioning of the cardiovascular system. Over the past decade, with the application of high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS), an increasing number novel acylation modifications have been discovered, including propionylation, crotonylation, butyrylation, succinylation, lactylation, and isonicotinylation. Each change in protein conformation has the potential to alter protein function and lead to CVDs, and this process is usually reversible. This article summarizes the mechanisms underlying several common PTMs involved in the occurrence and development of CVDs.
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Affiliation(s)
- XueLi Cheng
- Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital affiliated to Qingdao University, Jinan, 250014, Shandong, China
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266073, Shandong, China
| | - Kai Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266073, Shandong, China
| | - Yan Zhao
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266073, Shandong, China
| | - Kun Wang
- Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital affiliated to Qingdao University, Jinan, 250014, Shandong, China.
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, 266073, Shandong, China.
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Duan W, Liu C, Zhou J, Yu Q, Duan Y, Zhang T, Li Y, Fu G, Sun Y, Tian J, Xia Z, Yang Y, Liu Y, Xu S. Upregulation of mitochondrial calcium uniporter contributes to paraquat-induced neuropathology linked to Parkinson's disease via imbalanced OPA1 processing. JOURNAL OF HAZARDOUS MATERIALS 2023; 453:131369. [PMID: 37086674 DOI: 10.1016/j.jhazmat.2023.131369] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 03/18/2023] [Accepted: 04/03/2023] [Indexed: 05/03/2023]
Abstract
Paraquat (PQ) is the most widely used herbicide in agriculture worldwide and has been considered a high-risk environmental factor for Parkinson's disease (PD). Chronic PQ exposure selectively induces dopaminergic neuron loss, the hallmark pathologic feature of PD, resulting in Parkinson-like movement disorders. However, the underlying mechanisms remain unclear. Here, we demonstrated that repetitive PQ exposure caused dopaminergic neuron loss, dopamine deficiency and motor deficits dose-dependently in mice. Accordingly, mitochondrial calcium uniporter (MCU) was highly expressed in PQ-exposed mice and neuronal cells. Importantly, MCU knockout (KO) effectively rescued PQ-induced dopaminergic neuron loss and motor deficits in mice. Genetic and pharmacological inhibition of MCU alleviated PQ-induced mitochondrial dysfunction and neuronal death in vitro. Mechanistically, PQ exposure triggered mitochondrial fragmentation via imbalance of the optic atrophy 1 (OPA1) processing manifested by cleavage of L-OPA1 to S-OPA1, which was reversed by inhibition of MCU. Notably, the upregulation of MCU was mediated by miR-129-1-3p posttranscriptionally, and overexpression of miR-129-1-3p could rebalance OPA1 processing and attenuate mitochondrial dysfunction and neuronal death induced by PQ exposure. Consequently, our work uncovers an essential role of MCU and a novel molecular mechanism, miR-MCU-OPA1, in PQ-induced pathogenesis of PD, providing a potential target and strategy for environmental neurotoxins-induced PD treatment.
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Affiliation(s)
- Weixia Duan
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Cong Liu
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Jie Zhou
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Qin Yu
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Yu Duan
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Tian Zhang
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Bioengineering College of Chongqing University, Chongqing 400044, China
| | - Yuanyuan Li
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Guanyan Fu
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Yapei Sun
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Jiacheng Tian
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Zhiqin Xia
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yingli Yang
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China; Center for Global Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Yongseng Liu
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China
| | - Shangcheng Xu
- Center of Laboratory Medicine, Chongqing Prevention and Treatment Center for Occupational Diseases, Chongqing 400060, China; Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and Poisoning, Chongqing 400060, China.
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Prasad Panda S, Kesharwani A. Micronutrients/miRs/ATP networking in mitochondria: Clinical intervention with ferroptosis, cuproptosis, and calcium burden. Mitochondrion 2023; 71:1-16. [PMID: 37172668 DOI: 10.1016/j.mito.2023.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 04/12/2023] [Accepted: 05/07/2023] [Indexed: 05/15/2023]
Abstract
The mitochondrial electron transport chain (mtETC) requires mainly coenzyme Q10 (CoQ10), copper (Cu2+), calcium (Ca2+), and iron (Fe2+) ions for efficient ATP production. According to cross-sectional research, up to 50% of patients with micronutrient imbalances have been linked to oxidative stress, mitochondrial dysfunction, reduced ATP production, and the prognosis of various diseases. The condition of ferroptosis, which is caused by the downregulation of CoQ10 and the activation of non-coding micro RNAs (miRs), is strongly linked to free radical accumulation, cancer, and neurodegenerative diseases. The entry of micronutrients into the mitochondrial matrix depends upon the higher threshold level of mitochondrial membrane potential (ΔΨm), and high cytosolic micronutrients. The elevated micronutrient in the mitochondrial matrix causes the utilization of all ATP, leading to a drop in ATP levels. Mitochondrial calcium uniporter (MCU) and Na+/Ca2+ exchanger (NCX) play a major role in Ca2+ influx in the mitochondrial matrix. The mitochondrial Ca2+ overload is regulated by specific miRs such as miR1, miR7, miR25, miR145, miR138, and miR214, thereby reducing apoptosis and improving ATP production. Cuproptosis is primarily brought on by increased Cu+ build-up and mitochondrial proteotoxic stress, mediated by ferredoxin-1 (FDX1) and long non-coding RNAs. Cu importers (SLC31A1) and exporters (ATP7B) influence intracellular Cu2+ levels to control cuproptosis. According to literature reviews, very few randomized micronutrient interventions have been carried out, despite the identification of a high prevalence of micronutrient deficiencies. In this review, we concentrated on essential micronutrients and specific miRs associated with ATP production that balance oxidative stress in mitochondria.
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Affiliation(s)
- Siva Prasad Panda
- Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India.
| | - Adarsh Kesharwani
- Institute of Pharmaceutical Research, GLA University, Mathura, Uttar Pradesh, India.
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Li X, Wang X, Wu J. miR‑4732‑5p promotes ovarian cancer mobility by targeting MCUR1. Oncol Lett 2023; 25:245. [PMID: 37153048 PMCID: PMC10161344 DOI: 10.3892/ol.2023.13831] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 03/07/2023] [Indexed: 05/09/2023] Open
Abstract
MicroRNAs (miRNAs/miRs) play critical roles in tumor progression. However, the role of miR-4732 and its underlying molecular mechanism in ovarian cancer (OC) remain unclear. In the present study, the high expression of miR-4732 was confirmed to be associated with the mortality of patients with OC following surgery, according to The Cancer Genome Atlas Ovarian Cancer database (TCGA-OV). Additionally, the expression of miR-4732 was positively associated with an increased tendency to exhibit an early TNM stage (IIA, IIB and IIC) of OC, indicating its promotional role in the early stages of tumorigenesis. By performing in vitro gain-of-function experiments, the transient transfection of IGROV1 cells with miR-4732-5p mimics enhanced cell viability according to Cell Counting Kit-8 assay, and cell migration and invasion in Transwell assays. However, though the application of loss-of-function experiments, the transient transfection of IGROV1 cells with miR-4732-5p inhibitors hindered cell viability, cell migration and invasion in vitro. Mitochondrial calcium uniporter regulator 1 (MCUR1) was validated as a downstream direct target of miR-4732-5p through bioinformatics analysis, western blotting and luciferase assays. Therefore, the results of the present study provide evidence that miR-4732-5p may promote OC cell mobility through the direct targeting of the tumor suppressor, MCUR1.
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Affiliation(s)
- Xin Li
- Department of Gynecology No. 5, Ningbo Women and Children's Hospital, Ningbo, Zhejiang 315012, P.R. China
- Correspondence to: Dr Xin Li, Department of Gynecology No. 5, Ningbo Women and Children's Hospital, 339 Liuting Street, Ningbo, Zhejiang 315012, P.R. China, E-mail:
| | - Xiaoqin Wang
- Department of Gynecology No. 5, Ningbo Women and Children's Hospital, Ningbo, Zhejiang 315012, P.R. China
| | - Jun Wu
- Department of Gynecology No. 5, Ningbo Women and Children's Hospital, Ningbo, Zhejiang 315012, P.R. China
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Szabo I, Szewczyk A. Mitochondrial Ion Channels. Annu Rev Biophys 2023; 52:229-254. [PMID: 37159294 DOI: 10.1146/annurev-biophys-092622-094853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Mitochondria are involved in multiple cellular tasks, such as ATP synthesis, metabolism, metabolite and ion transport, regulation of apoptosis, inflammation, signaling, and inheritance of mitochondrial DNA. The majority of the correct functioning of mitochondria is based on the large electrochemical proton gradient, whose component, the inner mitochondrial membrane potential, is strictly controlled by ion transport through mitochondrial membranes. Consequently, mitochondrial function is critically dependent on ion homeostasis, the disturbance of which leads to abnormal cell functions. Therefore, the discovery of mitochondrial ion channels influencing ion permeability through the membrane has defined a new dimension of the function of ion channels in different cell types, mainly linked to the important tasks that mitochondrial ion channels perform in cell life and death. This review summarizes studies on animal mitochondrial ion channels with special focus on their biophysical properties, molecular identity, and regulation. Additionally, the potential of mitochondrial ion channels as therapeutic targets for several diseases is briefly discussed.
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Affiliation(s)
- Ildiko Szabo
- Department of Biology, University of Padova, Italy;
| | - Adam Szewczyk
- Nencki Institute of Experimental Biology, Polish Academy of Sciences, Warsaw, Poland;
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Rodríguez-Prados M, Berezhnaya E, Castromonte MT, Menezes-Filho SL, Paillard M, Hajnóczky G. MICU1 occludes the mitochondrial calcium uniporter in divalent-free conditions. Proc Natl Acad Sci U S A 2023; 120:e2218999120. [PMID: 37126688 PMCID: PMC10175726 DOI: 10.1073/pnas.2218999120] [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: 11/06/2022] [Accepted: 03/30/2023] [Indexed: 05/03/2023] Open
Abstract
Mitochondrial Ca2+ uptake is mediated by the mitochondrial uniporter complex (mtCU) that includes a tetramer of the pore-forming subunit, MCU, a scaffold protein, EMRE, and the EF-hand regulatory subunit, MICU1 either homodimerized or heterodimerized with MICU2/3. MICU1 has been proposed to regulate Ca2+ uptake via the mtCU by physically occluding the pore and preventing Ca2+ flux at resting cytoplasmic [Ca2+] (free calcium concentration) and to increase Ca2+ flux at high [Ca2+] due to cooperative activation of MICUs EF-hands. However, mtCU and MICU1 functioning when its EF-hands are unoccupied by Ca2+ is poorly studied due to technical limitations. To overcome this barrier, we have studied the mtCU in divalent-free conditions by assessing the Ru265-sensitive Na+ influx using fluorescence-based measurement of mitochondrial matrix [Na+] (free sodium concentration) rise and the ensuing depolarization and swelling. We show an increase in all these measures of Na+ uptake in MICU1KO cells as compared to wild-type (WT) and rescued MICU1KO HEK cells. However, mitochondria in WT cells and MICU1 stable-rescued cells still allowed some Ru265-sensitive Na+ influx that was prevented by MICU1 in excess upon acute overexpression. Thus, MICU1 restricts the cation flux across the mtCU in the absence of Ca2+, but even in cells with high endogenous MICU1 expression such as HEK, some mtCU seem to lack MICU1-dependent gating. We also show rearrangement of the mtCU and altered number of functional channels in MICU1KO and different rescues, and loss of MICU1 during mitoplast preparation, that together might have obscured the pore-blocking function of MICU1 in divalent-free conditions in previous studies.
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Affiliation(s)
- Macarena Rodríguez-Prados
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
| | - Elena Berezhnaya
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
| | - Maria Teresa Castromonte
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
| | - Sergio L. Menezes-Filho
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
| | - Melanie Paillard
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
| | - György Hajnóczky
- MitoCare Center, Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA19107
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李 学, 吴 松, 关 发, 刘 力. [Decreased Expression of Mitochondrial Calcium Uptake Protein 1 Leads to Skeletal Muscle Dysfunction in Septic Mice]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2023; 54:552-557. [PMID: 37248583 PMCID: PMC10475437 DOI: 10.12182/20230560102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Indexed: 05/31/2023]
Abstract
Objective To observe the effect of sepsis on skeletal muscle function and to explore the role of skeletal muscle mitochondrial calcium uptake protein 1 (MICU1). Methods A total of 40 specific-pathogen-free (SPF) healthy male C57BL/6J mice were randomly assigned to 4 groups, a sham operation group (Sham group, n=8), a sepsis modeling 6 h group (cecal ligation and puncture [CLP]-6 h group, n=10), a sepsis modeling 12 h group (CLP-12 h group, n=10), and a sepsis modeling 24 h group (CLP-24 h, n=12). The sepsis model was established by CLP. Mice in the Sham group only underwent laparotomic exploration of the cecum. Another 20 SPF mice were selected. The tibialis anterior muscle on one side was empty-transfected with adeno-associated virus (AAV) as controls (AAV-C), and the tibialis anterior muscle on the other side was transfected with AAV to enhance MICU1 expression (AAV-M). The mice were randomly assigned to two groups, a sham operation group (AAV-C-Sham and AAV-M-Sham, n=8) and a sepsis model 24 h group (AAV-C-CLP and AAV-M-CLP, n=12). The grip strength and compound muscle action potential (CMAP) of the tibialis anterior muscle were measured in each group at the corresponding time points. The levels of inflammatory factors, including tumor necrosis factor α (TNF-α) and interleukin 6 (IL-6), in the skeletal muscle were measured by ELISA. The morphological changes of skeletal muscle cells were observed through H&E staining. The expression levels of MICU1 and muscle atrophy-related proteins, including muscle RING-finger containing protein 1 (MuRF1) and muscle atrophy Fbox protein (MAFbx), were determined by Western blot. The expression levels of MICU1 mRNA in skeletal muscle were determined by RT-qPCR. Results Compared with mice in the Sham group, mice in the CLP group showed decreased body weight ( P<0.05); their grip strength decreased with the prolongation of CLP modeling time ( P<0.05); the amplitude of CMAP decreased, showing prolonged duration and latency ( P<0.05); the expression levels of inflammatory factors, including TNF-α and IL-6, in skeletal muscle increased gradually ( P<0.05); the fiber diameter and cross-sectional area of skeletal muscle decreased gradually with the prolongation of modeling time ( P<0.05); the protein expression levels of MuRF1and MAFbx proteins increased gradually ( P<0.05); the expression levels of MICU1 protein and mRNA decreased gradually ( P<0.05). There was no significant difference in all indices between AAV-M-Sham and AAV-C-Sham groups ( P>0.05). Compared with mice in the AAV-C-CLP group, mice in the AAV-M-CLP group showed increased grip strength ( P<0.05); the amplitude of CMAP increased, showing shortened duration and latency ( P <0.05); the fiber diameter and cross-sectional area of skeletal muscle increased ( P<0.05); the expression levels of MuRF1and MAFbx decreased ( P<0.05). Conclusion Sepsis leads to skeletal muscle dysfunction, which is related to the decrease in mitochondrial MICU1 expression.
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Affiliation(s)
- 学欣 李
- 西南医科大学附属医院 麻醉科 (泸州 646000)Department of Anesthesia, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - 松林 吴
- 西南医科大学附属医院 麻醉科 (泸州 646000)Department of Anesthesia, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - 发升 关
- 西南医科大学附属医院 麻醉科 (泸州 646000)Department of Anesthesia, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - 力 刘
- 西南医科大学附属医院 麻醉科 (泸州 646000)Department of Anesthesia, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
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MacEwen MJ, Sancak Y. Beyond the matrix: structural and physiological advancements in mitochondrial calcium signaling. Biochem Soc Trans 2023; 51:665-673. [PMID: 36960768 PMCID: PMC10212541 DOI: 10.1042/bst20220317] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/08/2023] [Accepted: 03/10/2023] [Indexed: 03/25/2023]
Abstract
Mitochondrial calcium (Ca2+) signaling has long been known to regulate diverse cellular functions, ranging from ATP production via oxidative phosphorylation, to cytoplasmic Ca2+ signaling to apoptosis. Central to mitochondrial Ca2+ signaling is the mitochondrial Ca2+ uniporter complex (MCUC) which enables Ca2+ flux from the cytosol into the mitochondrial matrix. Several pivotal discoveries over the past 15 years have clarified the identity of the proteins comprising MCUC. Here, we provide an overview of the literature on mitochondrial Ca2+ biology and highlight recent findings on the high-resolution structure, dynamic regulation, and new functions of MCUC, with an emphasis on publications from the last five years. We discuss the importance of these findings for human health and the therapeutic potential of targeting mitochondrial Ca2+ signaling.
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Affiliation(s)
| | - Yasemin Sancak
- Department of Pharmacology, University of Washington, Seattle, WA 98195, U.S.A
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de Ridder I, Kerkhofs M, Lemos FO, Loncke J, Bultynck G, Parys JB. The ER-mitochondria interface, where Ca 2+ and cell death meet. Cell Calcium 2023; 112:102743. [PMID: 37126911 DOI: 10.1016/j.ceca.2023.102743] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/20/2023] [Accepted: 04/24/2023] [Indexed: 05/03/2023]
Abstract
Endoplasmic reticulum (ER)-mitochondria contact sites are crucial to allow Ca2+ flux between them and a plethora of proteins participate in tethering both organelles together. Inositol 1,4,5-trisphosphate receptors (IP3Rs) play a pivotal role at such contact sites, participating in both ER-mitochondria tethering and as Ca2+-transport system that delivers Ca2+ from the ER towards mitochondria. At the ER-mitochondria contact sites, the IP3Rs function as a multi-protein complex linked to the voltage-dependent anion channel 1 (VDAC1) in the outer mitochondrial membrane, via the chaperone glucose-regulated protein 75 (GRP75). This IP3R-GRP75-VDAC1 complex supports the efficient transfer of Ca2+ from the ER into the mitochondrial intermembrane space, from which the Ca2+ ions can reach the mitochondrial matrix through the mitochondrial calcium uniporter. Under physiological conditions, basal Ca2+ oscillations deliver Ca2+ to the mitochondrial matrix, thereby stimulating mitochondrial oxidative metabolism. However, when mitochondrial Ca2+ overload occurs, the increase in [Ca2+] will induce the opening of the mitochondrial permeability transition pore, thereby provoking cell death. The IP3R-GRP75-VDAC1 complex forms a hub for several other proteins that stabilize the complex and/or regulate the complex's ability to channel Ca2+ into the mitochondria. These proteins and their mechanisms of action are discussed in the present review with special attention for their role in pathological conditions and potential implication for therapeutic strategies.
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Affiliation(s)
- Ian de Ridder
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium
| | - Martijn Kerkhofs
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium
| | - Fernanda O Lemos
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium
| | - Jens Loncke
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium
| | - Geert Bultynck
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium.
| | - Jan B Parys
- KU Leuven, Laboratory for Molecular and Cellular Signaling, Department of Cellular and Molecular Medicine & Leuven Kanker Instituut, Campus Gasthuisberg O/N-1 B-802, Herestraat 49, Leuven BE-3000, Belgium.
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BAO WEI, HAN QIANGUANG, GUAN XIAO, WANG ZIJIE, GU MIN. Solute carrier-related signature for assessing prognosis and immunity in patients with clear-cell renal cell carcinoma. Oncol Res 2023; 31:181-192. [PMID: 37304236 PMCID: PMC10208045 DOI: 10.32604/or.2023.028051] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 02/07/2023] [Indexed: 06/13/2023] Open
Abstract
Background Clear-cell renal cell carcinoma (ccRCC) is the most common malignant kidney cancer. However, the tumor microenvironment and crosstalk involved in metabolic reprogramming in ccRCC are not well-understood. Methods We used The Cancer Genome Atlas to obtain ccRCC transcriptome data and clinical information. The E-MTAB-1980 cohort was used for external validation. The GENECARDS database contains the first 100 solute carrier (SLC)-related genes. The predictive value of SLC-related genes for ccRCC prognosis and treatment was assessed using univariate Cox regression analysis. An SLC-related predictive signature was developed through Lasso regression analysis and used to determine the risk profiles of patients with ccRCC. Patients in each cohort were separated into high- and low-risk groups based on their risk scores. The clinical importance of the signature was assessed through survival, immune microenvironment, drug sensitivity, and nomogram analyses using R software. Results SLC25A23, SLC25A42, SLC5A1, SLC3A1, SLC25A37, SLC5A6, SLCO5A1, and SCP2 comprised the signatures of the eight SLC-related genes. Patients with ccRCC were separated into high- and low-risk groups based on the risk value in the training and validation cohorts; the high-risk group had a significantly worse prognosis (p < 0.001). The risk score was an independent predictive indicator of ccRCC in the two cohorts according to univariate and multivariate Cox regression (p < 0.05). Analysis of the immune microenvironment showed that immune cell infiltration and immune checkpoint gene expression differed between the two groups (p < 0.05). Drug sensitivity analysis showed that compared to the low-risk group, the high-risk group was more sensitive to sunitinib, nilotinib, JNK-inhibitor-VIII, dasatinib, bosutinib, and bortezomib (p < 0.001). Survival analysis and receiver operating characteristic curves were validated using the E-MTAB-1980 cohort. Conclusions SLC-related genes have predictive relevance in ccRCC and play roles in the immunological milieu. Our results provide insight into metabolic reprogramming in ccRCC and identify promising treatment targets for ccRCC.
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Affiliation(s)
- WEI BAO
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - QIANGUANG HAN
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - XIAO GUAN
- Department of General Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - ZIJIE WANG
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - MIN GU
- Department of Urology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
- Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Zhang Q, Huang Y, Wu A, Duan Q, He P, Huang H, Gao Y, Nie K, Liu Q, Wang L. Calcium/calmodulin-dependent serine protein kinase exacerbates mitochondrial calcium uniporter-related mitochondrial calcium overload by phosphorylating α-synuclein in Parkinson's disease. Int J Biochem Cell Biol 2023; 157:106385. [PMID: 36754160 DOI: 10.1016/j.biocel.2023.106385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/09/2023]
Abstract
α-Synuclein phosphorylation and mitochondrial calcium homeostasis are important mechanisms underlying mitochondrial dysfunction in Parkinson's disease, but the network regulating these mechanisms remains unclear. We identified the role of key phosphokinases and the pathological effects of α-synuclein phosphorylation on mitochondrial calcium influx and mitochondrial function in Parkinson's disease. The function of the key phosphokinase, calcium/calmodulin-dependent serine protein kinase, was investigated through loss- and gain-of-function experiments using a cell model of Parkinson's disease. The regulation of mitochondrial calcium uniporter-mediated mitochondrial calcium influx by calcium/calmodulin-dependent serine protein kinase was explored using a cellular model of Parkinson's disease. Coimmunoprecipitation experiments and α-synuclein mutation were used to explore the mechanism through which calcium/calmodulin-dependent serine protein kinase regulates mitochondrial calcium uniporter-mediated mitochondrial calcium influx and exacerbates mitochondrial damage in Parkinson's disease. Here, we show the pathogenic role of calcium/calmodulin-dependent serine protein kinase in Parkinson's disease progression. Calcium/calmodulin-dependent serine protein kinase phosphorylated α-synuclein to activate mitochondrial calcium uniporter and thus increase mitochondrial calcium influx, and these effects were blocked by α-synuclein S129A mutant expression. Furthermore, the calcium/calmodulin-dependent serine protein kinase inhibitor CASK-IN-1 exerted neuroprotective effects in Parkinson's disease. Collectively, our results suggest that calcium/calmodulin-dependent serine protein kinase phosphorylates α-synuclein to activate the mitochondrial calcium uniporter and thereby causes mitochondrial calcium overload and mitochondrial damage in Parkinson's disease. We elucidated a new role of calcium/calmodulin-dependent serine protein kinase in Parkinson's disease and revealed the potential therapeutic value of targeting calcium/calmodulin-dependent serine protein kinase in Parkinson's disease treatment.
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Affiliation(s)
- Qingxi Zhang
- Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510100, China; Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Yin Huang
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
| | - Anbiao Wu
- Department of Cardiology, Laboratory of Heart Center; Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China
| | - Qingrui Duan
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Peikun He
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Haifeng Huang
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Yuyuan Gao
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Kun Nie
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China
| | - Qicai Liu
- Department of Cardiology, Laboratory of Heart Center; Guangdong Provincial Biomedical Engineering Technology Research Center for Cardiovascular Disease, Zhujiang Hospital, Southern Medical University, Guangzhou, 510280, China.
| | - Lijuan Wang
- Department of Neurology, Guangdong Neuroscience Institute, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, China; Guangzhou Key Laboratory of Diagnosis and Treatment for Neurodegenerative Diseases, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, 510080, China.
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Madaris TR, Venkatesan M, Maity S, Stein MC, Vishnu N, Venkateswaran MK, Davis JG, Ramachandran K, Uthayabalan S, Allen C, Osidele A, Stanley K, Bigham NP, Bakewell TM, Narkunan M, Le A, Karanam V, Li K, Mhapankar A, Norton L, Ross J, Aslam MI, Reeves WB, Singh BB, Caplan J, Wilson JJ, Stathopulos PB, Baur JA, Madesh M. Limiting Mrs2-dependent mitochondrial Mg 2+ uptake induces metabolic programming in prolonged dietary stress. Cell Rep 2023; 42:112155. [PMID: 36857182 PMCID: PMC10134742 DOI: 10.1016/j.celrep.2023.112155] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 10/28/2022] [Accepted: 02/08/2023] [Indexed: 03/02/2023] Open
Abstract
The most abundant cellular divalent cations, Mg2+ (mM) and Ca2+ (nM-μM), antagonistically regulate divergent metabolic pathways with several orders of magnitude affinity preference, but the physiological significance of this competition remains elusive. In mice consuming a Western diet, genetic ablation of the mitochondrial Mg2+ channel Mrs2 prevents weight gain, enhances mitochondrial activity, decreases fat accumulation in the liver, and causes prominent browning of white adipose. Mrs2 deficiency restrains citrate efflux from the mitochondria, making it unavailable to support de novo lipogenesis. As citrate is an endogenous Mg2+ chelator, this may represent an adaptive response to a perceived deficit of the cation. Transcriptional profiling of liver and white adipose reveals higher expression of genes involved in glycolysis, β-oxidation, thermogenesis, and HIF-1α-targets, in Mrs2-/- mice that are further enhanced under Western-diet-associated metabolic stress. Thus, lowering mMg2+ promotes metabolism and dampens diet-induced obesity and metabolic syndrome.
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Affiliation(s)
- Travis R Madaris
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Manigandan Venkatesan
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Soumya Maity
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Miriam C Stein
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Neelanjan Vishnu
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Mridula K Venkateswaran
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - James G Davis
- Department of Physiology and Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19103, USA
| | - Karthik Ramachandran
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | | | - Cristel Allen
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Ayodeji Osidele
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Kristen Stanley
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Nicholas P Bigham
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Terry M Bakewell
- Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Melanie Narkunan
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Amy Le
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Varsha Karanam
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Kang Li
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Aum Mhapankar
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Luke Norton
- Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Jean Ross
- Department of Biological Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA
| | - M Imran Aslam
- Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - W Brian Reeves
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Brij B Singh
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA
| | - Jeffrey Caplan
- Department of Biological Sciences, Delaware Biotechnology Institute, University of Delaware, Newark, DE 19711, USA
| | - Justin J Wilson
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Western University, London, ON N6A 5C1, Canada
| | - Joseph A Baur
- Department of Physiology and Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19103, USA.
| | - Muniswamy Madesh
- Department of Medicine, Center for Mitochondrial Medicine, University of Texas Health San Antonio, San Antonio, TX 78229, USA; Department of Medicine, Cardiology/Diabetes Divisions, University of Texas Health San Antonio, San Antonio, TX 78229, USA.
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Yao J, Miao Y, Zhu L, Wan M, Lu Y, Tang W. Histidine trinucleotide binding protein 2: from basic science to clinical implications. Biochem Pharmacol 2023; 212:115527. [PMID: 37004779 DOI: 10.1016/j.bcp.2023.115527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
Histidine triad nucleotide-binding protein 2 (HINT2) is a dimeric protein that belongs to the histidine triad protein superfamily, predominantly expressed in the liver, pancreas, and adrenal gland, and localised to the mitochondrion. HINT2 binds nucleotides and catalyses the hydrolysis of nucleotidyl substrates. Moreover, HINT2 has been identified as a key regulator of multiple biological processes, including mitochondria-dependent apoptosis, mitochondrial protein acetylation, and steroidogenesis. Genetic manipulation has provided new insights into the physiological roles of HINT2 in several processes, such as inhibition of cancer progression, regulation of hepatic lipid metabolism, and protective effects on the cardiovascular system. The current review outlines the background and functions of HINT2. In addition, it summarises research progress on the correlation between HINT2 and human malignancies, hepatic metabolic diseases, and cardiovascular diseases, with an attempt to provide new research directions emerging in this field and to unveil the therapeutic value of HINT2 as a target in the combat of human diseases.
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D'Angelo V, Martinez C, Arreche N, Balaszczuk AM, del Carmen Fernández M, Burgos JI, Petroff MV, Fellet A. Thyroid hormone disorder and the heart: The role of cardiolipin in calcium handling. Exp Physiol 2023; 108:412-419. [PMID: 36651722 PMCID: PMC10103858 DOI: 10.1113/ep090817] [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: 09/06/2022] [Accepted: 01/03/2023] [Indexed: 01/19/2023]
Abstract
NEW FINDINGS What is the central question of this study? Do alterations in thyroid status affect haemodynamic parameters and echocardiographic measurements in the rat postnatal heart, and calcium handling, contractility, relaxation and cardiolipin content in isolated rat cardiomyocytes? What is the main finding and its importance? An imbalance in phospholipids of the mitochondrial membrane such as cardiolipin is related to defects in mitochondrial function. T3 -dependent cardiolipin signals contribute to the maintenance of mitochondrial homeostasis and involve Ca2+ handling, this pathway being more important in hypothyroidism. ABSTRACT The objective of this study was to evaluate whether alterations in thyroid status affect (1) haemodynamic parameters and echocardiographic measurements in the rat postnatal heart, and (2) calcium handling, contractility, relaxation and cardiolipin content in isolated rat cardiomyocytes. Sprague-Dawley rats aged 2 months treated with T3 (hyperthyroid, 20 μg/100 g body weight) or 0.02% methimazole (hypothyroid, w/v) for 28 days. Heart function was evaluated by echocardiography. Measurements of mean arterial pressure (MAP), heart rate, Ca2+ transients, cardiomyocyte shortening, number of spontaneous contractions per minute and cardiolipin (CL) content were performed. Thyroid disorders were associated with changes in pacemaker activity without modifications of MAP. Thyroid disorder induced changes in left ventricular diameter which were correlated with modifications of cardiac contractility (altered cell shortening and sarcoplasmic reticulum Ca2+ content). Endocrine disorders altered cardiomyocyte relaxation (reduction in the time to 50% re-lengthening and the time to 50% Ca2+ decay). Thyroid disorder increased the number of spontaneous contractions per minute (an index of pro-arrhythmogenic behaviour). CL content was increased only in hypothyroid rats. Changes in CL content, CL composition and CL-protein interaction in mitochondria from hypothyroid animals are responsible for alterations of contractile and relaxation cardiac function. This mechanism may be not be involved in T3 -treated rats. Maintenance of euthyroidism is of crucial importance to preserve cardiac performance. An imbalance in relation to phospholipids of the mitochondrial membrane such as CL is related to defects in mitochondrial function. T3 -dependent CL signals contribute to the maintenance of mitochondrial homeostasis and involve Ca2+ handling, this pathway being more important in hypothyroidism.
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Affiliation(s)
- Valentina D'Angelo
- Cátedra de Fisiología, Facultad de Farmacia y Bioquímica, IQUIMEFA‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
| | - Candela Martinez
- Cátedra de Fisiología, Facultad de Farmacia y Bioquímica, IQUIMEFA‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
| | - Noelia Arreche
- Cátedra de Fisiología, Facultad de Farmacia y Bioquímica, IQUIMEFA‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
| | - Ana María Balaszczuk
- Cátedra de Fisiología, Facultad de Farmacia y Bioquímica, IQUIMEFA‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
| | - María del Carmen Fernández
- Cátedra de Biología Celular y MolecularFacultad de Farmacia y BioquímicaIQUIFIB‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
| | - Juan Ignacio Burgos
- Centro de Investigaciones Cardiovasculares Horacio Cingolani. Facultad de Ciencias MédicasUniversidad Nacional de La PlataCONICETLa PlataArgentina
| | - Martin Vila Petroff
- Centro de Investigaciones Cardiovasculares Horacio Cingolani. Facultad de Ciencias MédicasUniversidad Nacional de La PlataCONICETLa PlataArgentina
| | - Andrea Fellet
- Cátedra de Fisiología, Facultad de Farmacia y Bioquímica, IQUIMEFA‐CONICETCiudad Autónoma de Buenos AiresUniversidad de Buenos AiresBuenos AiresArgentina
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Liu C, Li H, Duan W, Duan Y, Yu Q, Zhang T, Sun Y, Li Y, Liu Y, Xu S. MCU Upregulation Overactivates Mitophagy by Promoting VDAC1 Dimerization and Ubiquitination in the Hepatotoxicity of Cadmium. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2203869. [PMID: 36642847 PMCID: PMC9982555 DOI: 10.1002/advs.202203869] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Cadmium (Cd) is a high-risk pathogenic toxin for hepatic diseases. Excessive mitophagy is a hallmark in Cd-induced hepatotoxicity. However, the underlying mechanism remains obscure. Mitochondrial calcium uniporter (MCU) is a key regulator for mitochondrial and cellular homeostasis. Here, Cd exposure upregulated MCU expression and increased mitochondrial Ca2+ uptake are found. MCU inhibition through siRNA or by Ru360 significantly attenuates Cd-induced excessive mitophagy, thereby rescues mitochondrial dysfunction and increases hepatocyte viability. Heterozygous MCU knockout mice exhibit improved liver function, ameliorated pathological damage, less mitochondrial fragmentation, and mitophagy after Cd exposure. Mechanistically, Cd upregulates MCU expression through phosphorylation activation of cAMP-response element binding protein at Ser133(CREBS133 ) and subsequent binding of MCU promoter at the TGAGGTCT, ACGTCA, and CTCCGTGATGTA regions, leading to increased MCU gene transcription. The upregulated MCU intensively interacts with voltage-dependent anion-selective channel protein 1 (VDAC1), enhances its dimerization and ubiquitination, resulting in excessive mitophagy. This study reveals a novel mechanism, through which Cd upregulates MCU to enhance mitophagy and hepatotoxicity.
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Affiliation(s)
- Cong Liu
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Hui‐Juan Li
- Institute of Rocket Force MedicineState Key Laboratory of TraumaBurns and Combined InjuryThird Military Medical UniversityChongqing400038P. R. China
| | - Wei‐Xia Duan
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Yu Duan
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Qin Yu
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Tian Zhang
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- Bioengineering College of Chongqing UniversityChongqing400044P. R. China
| | - Ya‐Pei Sun
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- School of Public HealthNanjing Medical University211166NanjingP. R. China
| | - Yuan‐Yuan Li
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Yong‐Sheng Liu
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
| | - Shang‐Cheng Xu
- Chongqing Key Laboratory of Prevention and Treatment for Occupational Diseases and PoisoningChongqing400060P. R. China
- National Emergency Response Team for Sudden Poisoningthe First Affiliated Hospital of Chongqing Medical and Pharmaceutical CollegeChongqing400060P. R. China
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Chen Z, Zhang R, Qin H, Jiang H, Wang A, Zhang X, Huang S, Sun M, Fan X, Lu Z, Li Y, Liu S, Liu M. The pulse light mode enhances the effect of photobiomodulation on B16F10 melanoma cells through autophagy pathway. Lasers Med Sci 2023; 38:71. [PMID: 36790539 DOI: 10.1007/s10103-023-03733-1] [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: 12/04/2022] [Accepted: 02/05/2023] [Indexed: 02/16/2023]
Abstract
Photobiomodulation (PBM) is the use of low irradiance light of specific wavelengths to generate physiological changes and therapeutic effects. However, there are few studies on the effects of PBM of different LED light modes on cells. Here, we investigated the difference of influence between continuous wave (CW) and pulse-PBM on B16F10 melanoma cells. Our results suggested that the pulse mode had a more significant PBM than the CW mode on B16F10 melanoma cells. Our study confirmed that ROS and Ca2+ levels in B16F10 melanoma cells treated with pulse-PBM were significantly higher than those in the control and CW-PBM groups. One mechanism that causes the difference in CW and pulse-PBM action is that pulse-PBM activates autophagy of melanoma cells through the ROS/OPN3/Ca2+ signaling pathway, and excessive autophagy activation inhibits proliferation and apoptosis of melanoma cells. Autophagy may be one of the reasons for the difference between pulse- and CW-PBM on melanoma cells. More importantly, melanoma cells responded to brief PBM pulses by increasing intracellular Ca2+ levels.
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Affiliation(s)
- Zeqing Chen
- Qingdao Municipal Center for Disease Control and Prevention, Qingdao, 266033, China
- Qingdao Municipal Health Commission, Qingdao, 266071, China
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Ruixiao Zhang
- Department of Nephrology, The Affiliated Qingdao Municipal Hospital of Qingdao University, Qingdao, China
| | - Haokuan Qin
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Hui Jiang
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Aixia Wang
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Xiaolin Zhang
- Institute for Electric Light Sources, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Shijie Huang
- Institute for Electric Light Sources, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Miao Sun
- Institute for Electric Light Sources, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Xuewei Fan
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Zhicheng Lu
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China
| | - Yinghua Li
- Central Laboratory, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, 200240, China.
- Department of Orthopedics, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, 200240, China.
| | - Shangfeng Liu
- Oral Biomedical Engineering Laboratory, Shanghai Stomatological Hospital, Fudan University, Shanghai, 200001, China.
| | - Muqing Liu
- Institute of Future Lighting, Academy for Engineering & Technology, Fudan University, 220th Handan Road, Shanghai, 200433, China.
- Institute for Electric Light Sources, Fudan University, 220th Handan Road, Shanghai, 200433, China.
- Zhongshan Fudan Joint Innovation Center, 6th Xiangxing Road, Zhongshan City, 528403, China.
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Patel A, Pietromicca JG, Venkatesan M, Maity S, Bard JE, Madesh M, Alevriadou BR. Modulation of the mitochondrial Ca 2+ uniporter complex subunit expression by different shear stress patterns in vascular endothelial cells. Physiol Rep 2023; 11:e15588. [PMID: 36754446 PMCID: PMC9908435 DOI: 10.14814/phy2.15588] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/26/2022] [Accepted: 01/06/2023] [Indexed: 06/18/2023] Open
Abstract
Mitochondrial calcium (m Ca2+ ) uptake occurs via the Mitochondrial Ca2+ Uniporter (MCU) complex and plays a critical role in mitochondrial dynamics, mitophagy, and apoptosis. MCU complex activity is in part modulated by the expression of its regulatory subunits. Cardiovascular disease models demonstrated altered gene/protein expression of one or multiple subunits in different cells, including vascular endothelial cells (ECs). MCU complex activity was found necessary for stable flow (s-flow)-induced mitophagy and promotion of an atheroprotective EC phenotype. Disturbed flow (d-flow) is known to lead to an atheroprone phenotype. Despite the role of MCU in flow-regulated EC function, flow-induced alterations in MCU complex subunit expression are currently unknown. We exposed cultured human ECs to atheroprotective (steady shear stress, SS) or atheroprone flow (oscillatory shear stress, OS) and measured mRNA and protein levels of the MCU complex members. SS and OS differentially modulated subunit expression at gene/protein levels. Protein expression changes of the core MCU, m Ca2+ uptake 1 (MICU1) and MCU regulator 1 (MCUR1) subunits in SS- and OS-exposed, compared to static, ECs suggested an enhanced m Ca2+ influx under each flow and a potential contribution to EC dysfunction under OS. In silico analysis of a single-cell RNA-sequencing dataset was employed to extract transcript values of MCU subunits in mouse carotid ECs from regions exposed to s-flow or d-flow. Mcu and Mcur1 genes showed significant differences in expression after prolonged exposure to each flow. The differential expression of MCU complex subunits indicated a tight regulation of the complex activity under physiological and pathological hemodynamic conditions.
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Affiliation(s)
- Akshar Patel
- Vascular Mechanobiology Laboratory, Department of Biomedical Engineering, and Center for Cell, Gene, and Tissue EngineeringUniversity at Buffalo – The State University of New YorkBuffaloNew YorkUSA
| | - Julia G. Pietromicca
- Vascular Mechanobiology Laboratory, Department of Biomedical Engineering, and Center for Cell, Gene, and Tissue EngineeringUniversity at Buffalo – The State University of New YorkBuffaloNew YorkUSA
| | - Manigandan Venkatesan
- Department of Medicine, Center for Mitochondrial MedicineUniversity of Texas Health San AntonioSan AntonioTexasUSA
| | - Soumya Maity
- Department of Medicine, Center for Mitochondrial MedicineUniversity of Texas Health San AntonioSan AntonioTexasUSA
| | - Jonathan E. Bard
- Genomics and Bioinformatics Core, Jacobs School of Medicine and Biomedical SciencesUniversity at Buffalo – The State University of New YorkBuffaloNew YorkUSA
| | - Muniswamy Madesh
- Department of Medicine, Center for Mitochondrial MedicineUniversity of Texas Health San AntonioSan AntonioTexasUSA
| | - B. Rita Alevriadou
- Vascular Mechanobiology Laboratory, Department of Biomedical Engineering, and Center for Cell, Gene, and Tissue EngineeringUniversity at Buffalo – The State University of New YorkBuffaloNew YorkUSA
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Gareev I, Beylerli O, Liang Y, Lu E, Ilyasova T, Sufianov A, Sufianova G, Shi H, Ahmad A, Yang G. The Role of Mitochondria-Targeting miRNAs in Intracerebral Hemorrhage. Curr Neuropharmacol 2023; 21:1065-1080. [PMID: 35524670 PMCID: PMC10286585 DOI: 10.2174/1570159x20666220507021445] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 04/02/2022] [Accepted: 04/24/2022] [Indexed: 11/22/2022] Open
Abstract
Non-traumatic intracerebral hemorrhage (ICH) is the most common type of hemorrhagic stroke, most often occurring between the ages of 45 and 60. Arterial hypertension (AH) is most often the cause of ICH, followed by atherosclerosis, blood diseases, inflammatory changes in cerebral vessels, intoxication and vitamin deficiencies. Cerebral hemorrhage can occur by diapedesis or as a result of a ruptured vessel. AH is difficult to treat, requires surgery and can lead to disability or death. One of the important directions in the study of the pathogenesis of ICH is mitochondrial dysfunction and its regulation. The key role of mitochondrial dysfunction in AH and atherosclerosis, as well as in the development of brain damage after hemorrhage, has been acknowledged. MicroRNAs (miRNAs) are a class of non-coding RNAs (about 18-22 nucleotides) that regulate a variety of biological processes including cell differentiation, proliferation, apoptosis, etc., primarily through gene repression. There is growing evidence to support dysregulated miRNAs in various cardiovascular diseases, including ICH. Further, the realization of miRNAs within mitochondrial compartment has challenged the traditional knowledge of signaling pathways involved in the regulatory network of cardiovascular diseases. However, the role of miRNAs in mitochondrial dysfunction for ICH is still under-appreciated, with comparatively much lesser studies and investigations reported, than those in other cardiovascular diseases. In this review, we summarize the up-to-date findings on the published role miRNAs in mitochondrial function for ICH, and the potential use of miRNAs in clinical settings, such as potential therapeutic targets and non-invasive diagnostic/prognostic biomarker tools.
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Affiliation(s)
- Ilgiz Gareev
- Federal Centre of Neurosurgery, Tyumen, Russia
- Рeoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russian Federation
| | - Ozal Beylerli
- Federal Centre of Neurosurgery, Tyumen, Russia
- Рeoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russian Federation
| | - Yanchao Liang
- Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Institute of Brain Science, Harbin Medical University, Harbin, 150001, China
| | - Enzhou Lu
- Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Institute of Brain Science, Harbin Medical University, Harbin, 150001, China
| | - Tatiana Ilyasova
- Bashkir State Medical University, Ufa, Republic of Bashkortostan, 450008, Russia
| | - Albert Sufianov
- Federal Centre of Neurosurgery, Tyumen, Russia
- Department of Neurosurgery, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Рeoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow, 117198, Russian Federation
| | - Galina Sufianova
- Department of Pharmacology, Tyumen State Medical University, Tyumen, Russia
| | - Huaizhang Shi
- Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Institute of Brain Science, Harbin Medical University, Harbin, 150001, China
| | - Aamir Ahmad
- Interim Translational Research Institute, Academic Health System, Hamad Medical Corporation, Doha, Qatar
| | - Guang Yang
- Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
- Institute of Brain Science, Harbin Medical University, Harbin, 150001, China
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Colussi DM, Stathopulos PB. From passage to inhibition: Uncovering the structural and physiological inhibitory mechanisms of MCUb in mitochondrial calcium regulation. FASEB J 2023; 37:e22678. [PMID: 36538269 PMCID: PMC10107711 DOI: 10.1096/fj.202201080r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 10/14/2022] [Accepted: 11/21/2022] [Indexed: 12/24/2022]
Abstract
Mitochondrial calcium (Ca2+ ) regulation is critically implicated in the regulation of bioenergetics and cell fate. Ca2+ , a universal signaling ion, passively diffuses into the mitochondrial intermembrane space (IMS) through voltage-dependent anion channels (VDAC), where uptake into the matrix is tightly regulated across the inner mitochondrial membrane (IMM) by the mitochondrial Ca2+ uniporter complex (mtCU). In recent years, immense progress has been made in identifying and characterizing distinct structural and physiological mechanisms of mtCU component function. One of the main regulatory components of the Ca2+ selective mtCU channel is the mitochondrial Ca2+ uniporter dominant-negative beta subunit (MCUb). The structural mechanisms underlying the inhibitory effect(s) exerted by MCUb are poorly understood, despite high homology to the main mitochondrial Ca2+ uniporter (MCU) channel-forming subunits. In this review, we provide an overview of the structural differences between MCUb and MCU, believed to contribute to the inhibition of mitochondrial Ca2+ uptake. We highlight the possible structural rationale for the absent interaction between MCUb and the mitochondrial Ca2+ uptake 1 (MICU1) gatekeeping subunit and a potential widening of the pore upon integration of MCUb into the channel. We discuss physiological and pathophysiological information known about MCUb, underscoring implications in cardiac function and arrhythmia as a basis for future therapeutic discovery. Finally, we discuss potential post-translational modifications on MCUb as another layer of important regulation.
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Affiliation(s)
- Danielle M Colussi
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
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