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Immanuel T, Li J, Green TN, Bogdanova A, Kalev-Zylinska ML. Deregulated calcium signaling in blood cancer: Underlying mechanisms and therapeutic potential. Front Oncol 2022; 12:1010506. [PMID: 36330491 PMCID: PMC9623116 DOI: 10.3389/fonc.2022.1010506] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 09/21/2022] [Indexed: 02/05/2023] Open
Abstract
Intracellular calcium signaling regulates diverse physiological and pathological processes. In solid tumors, changes to calcium channels and effectors via mutations or changes in expression affect all cancer hallmarks. Such changes often disrupt transport of calcium ions (Ca2+) in the endoplasmic reticulum (ER) or mitochondria, impacting apoptosis. Evidence rapidly accumulates that this is similar in blood cancer. Principles of intracellular Ca2+ signaling are outlined in the introduction. We describe different Ca2+-toolkit components and summarize the unique relationship between extracellular Ca2+ in the endosteal niche and hematopoietic stem cells. The foundational data on Ca2+ homeostasis in red blood cells is discussed, with the demonstration of changes in red blood cell disorders. This leads to the role of Ca2+ in neoplastic erythropoiesis. Then we expand onto the neoplastic impact of deregulated plasma membrane Ca2+ channels, ER Ca2+ channels, Ca2+ pumps and exchangers, as well as Ca2+ sensor and effector proteins across all types of hematologic neoplasms. This includes an overview of genetic variants in the Ca2+-toolkit encoding genes in lymphoid and myeloid cancers as recorded in publically available cancer databases. The data we compiled demonstrate that multiple Ca2+ homeostatic mechanisms and Ca2+ responsive pathways are altered in hematologic cancers. Some of these alterations may have genetic basis but this requires further investigation. Most changes in the Ca2+-toolkit do not appear to define/associate with specific disease entities but may influence disease grade, prognosis, treatment response, and certain complications. Further elucidation of the underlying mechanisms may lead to novel treatments, with the aim to tailor drugs to different patterns of deregulation. To our knowledge this is the first review of its type in the published literature. We hope that the evidence we compiled increases awareness of the calcium signaling deregulation in hematologic neoplasms and triggers more clinical studies to help advance this field.
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Affiliation(s)
- Tracey Immanuel
- Blood and Cancer Biology Laboratory, Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Jixia Li
- Blood and Cancer Biology Laboratory, Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
- Department of Laboratory Medicine, School of Medicine, Foshan University, Foshan City, China
| | - Taryn N. Green
- Blood and Cancer Biology Laboratory, Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
| | - Anna Bogdanova
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
- Zurich Center for Integrative Human Physiology, University of Zurich, Zürich, Switzerland
| | - Maggie L. Kalev-Zylinska
- Blood and Cancer Biology Laboratory, Department of Molecular Medicine and Pathology, University of Auckland, Auckland, New Zealand
- Haematology Laboratory, Department of Pathology and Laboratory Medicine, Auckland City Hospital, Auckland, New Zealand
- *Correspondence: Maggie L. Kalev-Zylinska,
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2
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Khan A, Kuriachan G, Mahalakshmi R. Cellular Interactome of Mitochondrial Voltage-Dependent Anion Channels: Oligomerization and Channel (Mis)Regulation. ACS Chem Neurosci 2021; 12:3497-3515. [PMID: 34503333 DOI: 10.1021/acschemneuro.1c00429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Voltage-dependent anion channels (VDACs) of the outer mitochondrial membrane are known conventionally as metabolite flux proteins. However, research findings in the past decade have revealed the multifaceted regulatory roles of VDACs, from governing cellular physiology and mitochondria-mediated apoptosis to directly regulating debilitating cancers and neurodegenerative diseases. VDACs achieve these diverse functions by establishing isoform-dependent stereospecific interactomes in the cell with the cytosolic constituents and endoplasmic reticulum complexes, and the machinery of the mitochondrial compartments. VDACs are now increasingly recognized as regulatory hubs of the cell. Not surprisingly, even the transient misregulation of VDACs results directly in mitochondrial dysfunction. Additionally, human VDACs are now implicated in interaction with aggregation-prone cytosolic proteins, including Aβ, tau, and α-synuclein, contributing directly to the onset of Alzheimer's and Parkinson's diseases. Deducing the interaction dynamics and mechanisms can lead to VDAC-targeted peptide-based therapeutics that can alleviate neurodegenerative states. This review succinctly presents the latest findings of the VDAC interactome, and the mode(s) of VDAC-dependent regulation of biochemical physiology. We also discuss the relevance of VDACs in pathophysiological states and aggregation-associated diseases and address how VDACs will facilitate the development of next-generation precision medicines.
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Affiliation(s)
- Altmash Khan
- Molecular Biophysics Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal 462066, India
| | - Gifty Kuriachan
- Molecular Biophysics Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal 462066, India
| | - Radhakrishnan Mahalakshmi
- Molecular Biophysics Laboratory, Department of Biological Sciences, Indian Institute of Science Education and Research, Bhopal 462066, India
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3
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Lemeshko VV. Electrical control of the cell energy metabolism at the level of mitochondrial outer membrane. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183493. [PMID: 33132193 DOI: 10.1016/j.bbamem.2020.183493] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/21/2020] [Accepted: 10/07/2020] [Indexed: 12/11/2022]
Abstract
Energy, generated by the mitochondrial oxidative phosphorylation system, is transferred to the cytosol across the mitochondrial outer membrane (MOM), through the voltage-dependent anion channels (VDACs). The role of the VDAC's voltage-gating process to control the transfer of ATP, creatine phosphate and other negatively charged metabolites across MOM might be crucial for the cell energy metabolism regulation. However, it depends on the probability of the outer membrane potential (OMP) generation by a currently undefined mechanism that has usually been considered doubtful, based on the assumption that VDACs always stay in the electrically open state. Nevertheless, computational analysis of various possible metabolically-dependent mechanisms of OMP generation suggests that MOM is not a "coarse sieve", but in fact it functions as an electrical gatekeeper of cell energy metabolism, due to a probable OMP-dependent VDAC's gating. OMP generation could also be involved in the control of cell death resistance and mechanisms of various diseases.
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Affiliation(s)
- Victor V Lemeshko
- Escuela de Física, Facultad de Ciencias, Universidad Nacional de Colombia, Sede Medellín, Carrera 65, Nro. 59A - 110, Medellín, Colombia.
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4
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Wasinger VC, Curnoe D, Boel C, Machin N, Goh HM. The Molecular Floodgates of Stress-Induced Senescence Reveal Translation, Signalling and Protein Activity Central to the Post-Mortem Proteome. Int J Mol Sci 2020; 21:ijms21176422. [PMID: 32899302 PMCID: PMC7504133 DOI: 10.3390/ijms21176422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/27/2020] [Accepted: 08/31/2020] [Indexed: 11/16/2022] Open
Abstract
The transitioning of cells during the systemic demise of an organism is poorly understood. Here, we present evidence that organismal death is accompanied by a common and sequential molecular flood of stress-induced events that propagate the senescence phenotype, and this phenotype is preserved in the proteome after death. We demonstrate activation of “death” pathways involvement in diseases of ageing, with biochemical mechanisms mapping onto neurological damage, embryonic development, the inflammatory response, cardiac disease and ultimately cancer with increased significance. There is sufficient bioavailability of the building blocks required to support the continued translation, energy, and functional catalytic activity of proteins. Significant abundance changes occur in 1258 proteins across 1 to 720 h post-mortem of the 12-week-old mouse mandible. Protein abundance increases concord with enzyme activity, while mitochondrial dysfunction is evident with metabolic reprogramming. This study reveals differences in protein abundances which are akin to states of stress-induced premature senescence (SIPS). The control of these pathways is significant for a large number of biological scenarios. Understanding how these pathways function during the process of cellular death holds promise in generating novel solutions capable of overcoming disease complications, maintaining organ transplant viability and could influence the findings of proteomics through “deep-time” of individuals with no historically recorded cause of death.
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Affiliation(s)
- Valerie C. Wasinger
- Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia
- Palaeontology, Geobiology and Earth Archives Research Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia; (C.B.); (N.M.); (H.M.G.)
- Correspondence: (V.C.W.); (D.C.)
| | - Darren Curnoe
- Palaeontology, Geobiology and Earth Archives Research Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia; (C.B.); (N.M.); (H.M.G.)
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of New South Wales Sydney, Kensington, NSW 2052, Australia
- Correspondence: (V.C.W.); (D.C.)
| | - Ceridwen Boel
- Palaeontology, Geobiology and Earth Archives Research Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia; (C.B.); (N.M.); (H.M.G.)
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of New South Wales Sydney, Kensington, NSW 2052, Australia
| | - Naomi Machin
- Palaeontology, Geobiology and Earth Archives Research Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia; (C.B.); (N.M.); (H.M.G.)
| | - Hsiao Mei Goh
- Palaeontology, Geobiology and Earth Archives Research Centre, University of New South Wales Sydney, Kensington, NSW 2052, Australia; (C.B.); (N.M.); (H.M.G.)
- ARC Centre of Excellence for Australian Biodiversity and Heritage, University of New South Wales Sydney, Kensington, NSW 2052, Australia
- Centre for Global Archaeological Research, University Sains Malaysia, Penang 11800, Malaysia
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5
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VDAC electronics: 5. Mechanism and computational model of hexokinase-dependent generation of the outer membrane potential in brain mitochondria. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:2599-2607. [PMID: 30291922 DOI: 10.1016/j.bbamem.2018.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 09/07/2018] [Accepted: 10/02/2018] [Indexed: 01/01/2023]
Abstract
Glycolysis plays a key role in brain energy metabolism. The initial and rate-limiting step of brain glycolysis is catalyzed mainly by hexokinase I (HKI), the majority of which is bound to the mitochondrial outer membrane (MOM), mostly through the mitochondrial inter-membrane contact sites formed by the voltage-dependent anion channel (VDAC, outer membrane) and the adenine nucleotide translocator (ANT, inner membrane). Earlier, we proposed a mechanism for the generation of the mitochondrial outer membrane potential (OMP) as a result of partial application of the inner membrane potential (IMP) to MOM through the electrogenic ANT-VDAC-HK inter-membrane contact sites. According to this previous mechanism, the Gibbs free energy of the hexokinase reaction might modulate the generated OMP (Lemeshko, Biophys. J., 2002). In the present work, a new computational model was developed to perform thermodynamic estimations of the proposed mechanism of IMP-HKI-mediated generation of OMP. The calculated OMP was high enough to electrically regulate MOM permeability for negatively charged metabolites through free, unbound VDACs in MOM. On the other hand, the positive-inside polarity of OMP generated by the IMP-HKI-mediated mechanism is expected to protect mitochondria against elevated concentrations of cytosolic Ca2+. This computational analysis suggests that metabolically-dependent generation of OMP in the brain mitochondria, controlled by many factors that modulate VDAC1-HKI interaction, VDAC's voltage-gating properties and permeability, might represent one of the physiological mechanisms of regulation of the brain energy metabolism and of neuronal death resistance, and might also be involved in various neurodegenerative disorders, such as Alzheimer's disease.
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6
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Manzo G, Serra I, Magrí A, Casu M, De Pinto V, Ceccarelli M, Scorciapino MA. Folded Structure and Membrane Affinity of the N-Terminal Domain of the Three Human Isoforms of the Mitochondrial Voltage-Dependent Anion-Selective Channel. ACS OMEGA 2018; 3:11415-11425. [PMID: 30320261 PMCID: PMC6173511 DOI: 10.1021/acsomega.8b01536] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Accepted: 09/11/2018] [Indexed: 06/08/2023]
Abstract
Voltage-dependent anion-selective channels (VDACs) are primarily located in the mitochondrial outer membrane (MOM). They are essential for the regulation of ion and metabolite exchanges. In particular, their role in energy-related nucleotide exchange has many implications in apoptosis, cancer, and neurodegenerative diseases. It has been proposed that VDACs' functions are regulated by mobility of the N-terminal helical domain, which is bound to the inner wall of the main β-barrel domain but exists in equilibrium between the bound-folded and the unbound-unfolded state. When the N-terminal domain detaches from the channel's wall and eventually leaves the lumen, it can either stay exposed to the cytosolic environment or interact with the outer leaflet of the MOM; then, it may also interact with other protein partners. In humans, three different VDAC isoforms are expressed at different tissue-specific levels with evidence of distinct roles. Although the N-terminal domains share high sequence similarity, important differences do exist, with the functionality of the entire protein mostly attributed to them. In this work, the three-dimensional structure and membrane affinity of the three isolated hVDAC N-terminal peptides have been compared through Fourier-transform infrared and NMR spectroscopy in combination with molecular dynamics simulations, and measurement of the surface pressure of lipid monolayers. Although peptides were studied as isolated from the β-barrel domain, the observed differences are relevant for those whole protein's functions in which a protein-protein interaction is mediated by the N-terminal domain.
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Affiliation(s)
- Giorgia Manzo
- Department
of Chemical and Geological Sciences, Cittadella Universitaria di Monserrato, Department of Physics,
Cittadella Universitaria di Monserrato, and Department
of Biomedical Sciences, Biochemistry Unit, Cittadella Universitaria
di Monserrato, University of Cagliari, S.P. 8 km 0.700, 09042 Monserrato, Cagliari, Italy
| | - Ilaria Serra
- Department
of Chemical and Geological Sciences, Cittadella Universitaria di Monserrato, Department of Physics,
Cittadella Universitaria di Monserrato, and Department
of Biomedical Sciences, Biochemistry Unit, Cittadella Universitaria
di Monserrato, University of Cagliari, S.P. 8 km 0.700, 09042 Monserrato, Cagliari, Italy
| | - Andrea Magrí
- Department of Biomedicine
and Biotechnology, Section of Biology and Genetics, University of Catania, Via Santa Sofia 97, 95123 Catania, Italy
| | - Mariano Casu
- Department
of Chemical and Geological Sciences, Cittadella Universitaria di Monserrato, Department of Physics,
Cittadella Universitaria di Monserrato, and Department
of Biomedical Sciences, Biochemistry Unit, Cittadella Universitaria
di Monserrato, University of Cagliari, S.P. 8 km 0.700, 09042 Monserrato, Cagliari, Italy
| | - Vito De Pinto
- Department of Biomedicine
and Biotechnology, Section of Biology and Genetics, University of Catania, Via Santa Sofia 97, 95123 Catania, Italy
| | - Matteo Ceccarelli
- Department
of Chemical and Geological Sciences, Cittadella Universitaria di Monserrato, Department of Physics,
Cittadella Universitaria di Monserrato, and Department
of Biomedical Sciences, Biochemistry Unit, Cittadella Universitaria
di Monserrato, University of Cagliari, S.P. 8 km 0.700, 09042 Monserrato, Cagliari, Italy
| | - Mariano Andrea Scorciapino
- Department
of Chemical and Geological Sciences, Cittadella Universitaria di Monserrato, Department of Physics,
Cittadella Universitaria di Monserrato, and Department
of Biomedical Sciences, Biochemistry Unit, Cittadella Universitaria
di Monserrato, University of Cagliari, S.P. 8 km 0.700, 09042 Monserrato, Cagliari, Italy
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7
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Abstract
Isoforms of creatine kinase (CK) generate and use phosphocreatine, a concentrated and highly diffusible cellular "high energy" intermediate, for the main purpose of energy buffering and transfer in order to maintain cellular energy homeostasis. The mitochondrial CK isoform (mtCK) localizes to the mitochondrial intermembrane and cristae space, where it assembles into peripherally membrane-bound, large cuboidal homooctamers. These are part of proteolipid complexes wherein mtCK directly interacts with cardiolipin and other anionic phospholipids, as well as with the VDAC channel in the outer membrane. This leads to a stabilization and cross-linking of inner and outer mitochondrial membrane, forming so-called contact sites. Also the adenine nucleotide translocator of the inner membrane can be recruited into these proteolipid complexes, probably mediated by cardiolipin. The complexes have functions mainly in energy transfer to the cytosol and stimulation of oxidative phosphorylation, but also in restraining formation of reactive oxygen species and apoptosis. In vitro evidence indicates a putative role of mtCK in mitochondrial phospholipid distribution, and most recently a role in thermogenesis has been proposed. This review summarizes the essential structural and functional data of these mtCK complexes and describes in more detail the more recent advances in phospholipid interaction, thermogenesis, cancer and evolution of mtCK.
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Lemasters JJ. Evolution of Voltage-Dependent Anion Channel Function: From Molecular Sieve to Governator to Actuator of Ferroptosis. Front Oncol 2017; 7:303. [PMID: 29312883 PMCID: PMC5742158 DOI: 10.3389/fonc.2017.00303] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 11/24/2017] [Indexed: 01/07/2023] Open
Abstract
The voltage-dependent anion channel (VDAC) is well known as the pathway for passive diffusion of anionic hydrophilic mitochondrial metabolites across the outer membrane, but a more complex functionality of the three isoforms of VDAC has emerged, as addressed in the Frontiers in Oncology Research Topic on “Uncovering the Function of the Mitochondrial Protein VDAC in Health and Disease: from Structure-Function to Novel Therapeutic Strategies.” VDAC as the single most abundant protein in mitochondrial outer membranes is typically involved in isoform-specific interactions of the mitochondrion with its surroundings as, for example, during mitochondria-dependent pathways of cell death. VDAC closure can also act as an adjustable limiter (governator) of global mitochondrial metabolism, as during hepatic ethanol metabolism to promote selective oxidation of membrane-permeant acetaldehyde. In cancer cells, high free tubulin inhibits VDAC1 and VDAC2, contributing to suppression of mitochondrial function in the Warburg phenomenon. Erastin, the canonical inducer of ferroptosis, opens VDAC in the presence of tubulin and hyperpolarizes mitochondria, leading to mitochondrial production of reactive oxygen species, mitochondrial dysfunction, and cell death. Our understanding of VDAC function continues to evolve.
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Affiliation(s)
- John J Lemasters
- Center for Cell Death, Injury and Regeneration, Department of Drug Discovery and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, United States.,Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, United States
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9
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VDAC electronics: 4. Novel electrical mechanism and thermodynamic estimations of glucose repression of yeast respiration. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:2213-2223. [DOI: 10.1016/j.bbamem.2017.09.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 08/06/2017] [Accepted: 09/05/2017] [Indexed: 01/19/2023]
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10
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Camara AKS, Zhou Y, Wen PC, Tajkhorshid E, Kwok WM. Mitochondrial VDAC1: A Key Gatekeeper as Potential Therapeutic Target. Front Physiol 2017; 8:460. [PMID: 28713289 PMCID: PMC5491678 DOI: 10.3389/fphys.2017.00460] [Citation(s) in RCA: 210] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 06/16/2017] [Indexed: 12/23/2022] Open
Abstract
Mitochondria are the key source of ATP that fuels cellular functions, and they are also central in cellular signaling, cell division and apoptosis. Dysfunction of mitochondria has been implicated in a wide range of diseases, including neurodegenerative and cardiac diseases, and various types of cancer. One of the key proteins that regulate mitochondrial function is the voltage-dependent anion channel 1 (VDAC1), the most abundant protein on the outer membrane of mitochondria. VDAC1 is the gatekeeper for the passages of metabolites, nucleotides, and ions; it plays a crucial role in regulating apoptosis due to its interaction with apoptotic and anti-apoptotic proteins, namely members of the Bcl-2 family of proteins and hexokinase. Therefore, regulation of VDAC1 is crucial not only for metabolic functions of mitochondria, but also for cell survival. In fact, multiple lines of evidence have confirmed the involvement of VDAC1 in several diseases. Consequently, modulation or dysregulation of VDAC1 function can potentially attenuate or exacerbate pathophysiological conditions. Understanding the role of VDAC1 in health and disease could lead to selective protection of cells in different tissues and diverse diseases. The purpose of this review is to discuss the role of VDAC1 in the pathogenesis of diseases and as a potentially effective target for therapeutic management of various pathologies.
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Affiliation(s)
- Amadou K S Camara
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, United States.,Cardiovascular Center, Medical College of WisconsinMilwaukee, WI, United States
| | - YiFan Zhou
- Department of Assay Development, HD BiosciencesShanghai, China
| | - Po-Chao Wen
- Department of Biochemistry, Beckman Institute for Advanced Science and Technology, Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-ChampaignUrbana, IL, United States
| | - Emad Tajkhorshid
- Department of Biochemistry, Beckman Institute for Advanced Science and Technology, Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-ChampaignUrbana, IL, United States
| | - Wai-Meng Kwok
- Department of Anesthesiology, Medical College of WisconsinMilwaukee, WI, United States.,Cardiovascular Center, Medical College of WisconsinMilwaukee, WI, United States.,Department of Pharmacology and Toxicology, Medical College of WisconsinMilwaukee, WI, United States
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Rostovtseva TK, Hoogerheide DP, Rovini A, Bezrukov SM. Lipids in Regulation of the Mitochondrial Outer Membrane Permeability, Bioenergetics, and Metabolism. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/978-3-319-55539-3_8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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The multiple assemblies of VDAC: from conformational heterogeneity to β-aggregation and amyloid formation. Biochem Soc Trans 2016; 44:1531-1540. [PMID: 27911736 DOI: 10.1042/bst20160114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/22/2016] [Accepted: 06/28/2016] [Indexed: 01/10/2023]
Abstract
From their cellular localisation, to their atomic structure and their involvement in mitochondrial-driven cell death, voltage-dependent anion channels (VDACs) have challenged the scientific community with enigmas and paradoxes for over four decades. VDACs form active monomer channels in lipid bilayers, but they can also organise in multimeric assemblies. What induces, regulates and/or controls the monomer-multimer dynamics at the cellular level is not known. However, these state transitions appear to be relevant for mitochondria in making life or death decisions and for driving developmental processes. This review starts with a general introduction on VDACs and continues by examining VDAC oligomerisation/aggregation in light of recent discussions on VDAC-β-amyloid interactions and their involvement in Alzheimer's disease.
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