101
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Jazvinšćak Jembrek M, Slade N, Hof PR, Šimić G. The interactions of p53 with tau and Aß as potential therapeutic targets for Alzheimer’s disease. Prog Neurobiol 2018; 168:104-127. [DOI: 10.1016/j.pneurobio.2018.05.001] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 03/04/2018] [Accepted: 05/01/2018] [Indexed: 12/24/2022]
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102
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Kalani K, Yan SF, Yan SS. Mitochondrial permeability transition pore: a potential drug target for neurodegeneration. Drug Discov Today 2018; 23:1983-1989. [PMID: 30081095 PMCID: PMC6449145 DOI: 10.1016/j.drudis.2018.08.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 07/17/2018] [Accepted: 08/01/2018] [Indexed: 12/21/2022]
Abstract
The mitochondrial permeability transition pore (mPTP) has been considered a key contributor to cell death, inducing the process in several major neurodegenerative diseases. To date, the molecular nature of the mPTP remains confounding but its significance is universally acknowledged. Several targets have been screened and inhibition of mPTP has emerged as an attractive field for researchers. Nowadays, in silico-directed studies help to explore new small molecules targeting the mPTP to improve their drug-like properties and bioactivity. Here, we briefly summarize the role of mPTP in neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson disease (PD), and Huntington's disease (HD), and discusses current and future potential therapeutic targets.
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Affiliation(s)
- Komal Kalani
- Department of Pharmacology and Toxicology, Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS 66047, USA
| | - Shi Fang Yan
- Department of Pharmacology and Toxicology, Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS 66047, USA
| | - Shirley ShiDu Yan
- Department of Pharmacology and Toxicology, Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS 66047, USA.
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103
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Gan X, Zhang L, Liu B, Zhu Z, He Y, Chen J, Zhu J, Yu H. CypD-mPTP axis regulates mitochondrial functions contributing to osteogenic dysfunction of MC3T3-E1 cells in inflammation. J Physiol Biochem 2018; 74:395-402. [PMID: 29679227 DOI: 10.1007/s13105-018-0627-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 03/26/2018] [Indexed: 02/05/2023]
Abstract
Bone is a dynamic organ, the bone-forming osteoblasts and bone-resorbing osteoclasts form the physiological basis of bone remodeling process. During pathological process of numerous inflammatory diseases, these two aspects are uncoupled and the balance is usually tipped in favor of bone destruction. Evidence suggests that the inflammatory destruction of bone is mainly attributed to oxidative stress and is closely related to mitochondrial dysfunction. The mechanisms underlying osteogenic dysfunction in inflammation still need further investigation. Reactive oxygen species (ROS) is associated with mitochondrial dysfunction and cellular damage. Here, we reported an unexplored role of cyclophilin D (CypD), the major modulator of mitochondrial permeability transition pore (mPTP), and the CypD-mPTP axis in inflammation-induced mitochondrial dysfunction and bone damage. And the protective effects of knocking down CypD by siRNA interference or the addition of cyclosporin A (CsA), an inhibitor of CypD, were evidenced by rescued mitochondrial function and osteogenic function of osteoblast under tumor necrosis factor-α (TNF-α) treatment. These findings provide new insights into the role of CypD-mPTP-dependent mitochondrial pathway in the inflammatory bone injury. The protective effect of CsA or other moleculars affecting the mPTP formation may hold promise as a potential novel therapeutic strategy for inflammation-induced bone damage via mitochondrial pathways.
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Affiliation(s)
- Xueqi Gan
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Ling Zhang
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Beilei Liu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Zhuoli Zhu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Yuting He
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Junsheng Chen
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Junfei Zhu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China
| | - Haiyang Yu
- State Key Laboratory of Oral Disease, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Haiyang Yu 14 S Renmin Rd. 3rd Sec., Chengdu, 610041, Sichuan, People's Republic of China.
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104
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Panel M, Ghaleh B, Morin D. Mitochondria and aging: A role for the mitochondrial transition pore? Aging Cell 2018; 17:e12793. [PMID: 29888494 PMCID: PMC6052406 DOI: 10.1111/acel.12793] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2018] [Indexed: 12/15/2022] Open
Abstract
The cellular mechanisms responsible for aging are poorly understood. Aging is considered as a degenerative process induced by the accumulation of cellular lesions leading progressively to organ dysfunction and death. The free radical theory of aging has long been considered the most relevant to explain the mechanisms of aging. As the mitochondrion is an important source of reactive oxygen species (ROS), this organelle is regarded as a key intracellular player in this process and a large amount of data supports the role of mitochondrial ROS production during aging. Thus, mitochondrial ROS, oxidative damage, aging, and aging-dependent diseases are strongly connected. However, other features of mitochondrial physiology and dysfunction have been recently implicated in the development of the aging process. Here, we examine the potential role of the mitochondrial permeability transition pore (mPTP) in normal aging and in aging-associated diseases.
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Affiliation(s)
- Mathieu Panel
- INSERM U955, équipe 3; Créteil France
- Université Paris-Est, UMR_S955, DHU A-TVB, UPEC; Créteil France
| | - Bijan Ghaleh
- INSERM U955, équipe 3; Créteil France
- Université Paris-Est, UMR_S955, DHU A-TVB, UPEC; Créteil France
| | - Didier Morin
- INSERM U955, équipe 3; Créteil France
- Université Paris-Est, UMR_S955, DHU A-TVB, UPEC; Créteil France
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105
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Sidorova-Darmos E, Sommer R, Eubanks JH. The Role of SIRT3 in the Brain Under Physiological and Pathological Conditions. Front Cell Neurosci 2018; 12:196. [PMID: 30090057 PMCID: PMC6068278 DOI: 10.3389/fncel.2018.00196] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/17/2018] [Indexed: 12/22/2022] Open
Abstract
Sirtuin enzymes are a family of highly seven conserved protein deacetylases, namely SIRT1 through SIRT7, whose enzymatic activities require the cofactor nicotinamide adenine dinucleotide (NAD+). Sirtuins reside in different compartments within cells, and their activities have been shown to regulate a number of cellular pathways involved in but not limited to stress management, apoptosis and inflammatory responses. Given the importance of mitochondrial functional state in neurodegenerative conditions, the mitochondrial SIRT3 sirtuin, which is the primary deacetylase within mitochondria, has garnered considerable recent attention. It is now clear that SIRT3 plays a major role in regulating a host of mitochondrial molecular cascades that can contribute to both normal and pathophysiological processes. However, most of the currently available knowledge on SIRT3 stems from studies in non-neuronal cells, and the consequences of the interactions between SIRT3 and its targets in the CNS are only beginning to be elucidated. In this review, we will summarize current advances relating to SIRT3, and explore how its known functions could influence brain physiology.
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Affiliation(s)
- Elena Sidorova-Darmos
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, ON, Canada.,Department of Physiology, University of Toronto, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
| | - Rosa Sommer
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, ON, Canada.,Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - James H Eubanks
- Division of Genetics and Development, Krembil Research Institute, University Health Network, Toronto, ON, Canada.,Department of Physiology, University of Toronto, Toronto, ON, Canada.,Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada.,Department of Surgery (Neurosurgery), University of Toronto, Toronto, ON, Canada
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106
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Müller M, Ahumada-Castro U, Sanhueza M, Gonzalez-Billault C, Court FA, Cárdenas C. Mitochondria and Calcium Regulation as Basis of Neurodegeneration Associated With Aging. Front Neurosci 2018; 12:470. [PMID: 30057523 PMCID: PMC6053519 DOI: 10.3389/fnins.2018.00470] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 06/20/2018] [Indexed: 12/31/2022] Open
Abstract
Age is the main risk factor for the onset of neurodegenerative diseases. A decline of mitochondrial function has been observed in several age-dependent neurodegenerative diseases and may be a major contributing factor in their progression. Recent findings have shown that mitochondrial fitness is tightly regulated by Ca2+ signals, which are altered long before the onset of measurable histopathology hallmarks or cognitive deficits in several neurodegenerative diseases including Alzheimer’s disease (AD), the most frequent cause of dementia. The transfer of Ca2+ from the endoplasmic reticulum (ER) to the mitochondria, facilitated by the presence of mitochondria-associated membranes (MAMs), is essential for several physiological mitochondrial functions such as respiration. Ca2+ transfer to mitochondria must be finely regulated because excess Ca2+ will disturb oxidative phosphorylation (OXPHOS), thereby increasing the generation of reactive oxygen species (ROS) that leads to cellular damage observed in both aging and neurodegenerative diseases. In addition, excess Ca2+ and ROS trigger the opening of the mitochondrial transition pore mPTP, leading to loss of mitochondrial function and cell death. mPTP opening probably increases with age and its activity has been associated with several neurodegenerative diseases. As Ca2+ seems to be the initiator of the mitochondrial failure that contributes to the synaptic deficit observed during aging and neurodegeneration, in this review, we aim to look at current evidence for mitochondrial dysfunction caused by Ca2+ miscommunication in neuronal models of neurodegenerative disorders related to aging, with special emphasis on AD.
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Affiliation(s)
- Marioly Müller
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,Department of Medical Technology, Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | | | - Mario Sanhueza
- Center for Integrative Biology, Faculty of Sciences, Universidad Mayor, Santiago, Chile
| | - Christian Gonzalez-Billault
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile.,The Buck Institute for Research on Aging, Novato, CA, United States
| | - Felipe A Court
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,Center for Integrative Biology, Faculty of Sciences, Universidad Mayor, Santiago, Chile.,The Buck Institute for Research on Aging, Novato, CA, United States
| | - César Cárdenas
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile.,Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, United States
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107
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Pérez MJ, Jara C, Quintanilla RA. Contribution of Tau Pathology to Mitochondrial Impairment in Neurodegeneration. Front Neurosci 2018; 12:441. [PMID: 30026680 PMCID: PMC6041396 DOI: 10.3389/fnins.2018.00441] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 06/12/2018] [Indexed: 12/21/2022] Open
Abstract
Tau is an essential protein that physiologically promotes the assembly and stabilization of microtubules, and participates in neuronal development, axonal transport, and neuronal polarity. However, in a number of neurodegenerative diseases, including Alzheimer’s disease (AD), tau undergoes pathological modifications in which soluble tau assembles into insoluble filaments, leading to synaptic failure and neurodegeneration. Mitochondria are responsible for energy supply, detoxification, and communication in brain cells, and important evidence suggests that mitochondrial failure could have a pivotal role in the pathogenesis of AD. In this context, our group and others investigated the negative effects of tau pathology on specific neuronal functions. In particular, we observed that the presence of these tau forms could affect mitochondrial function at three different levels: (i) mitochondrial transport, (ii) morphology, and (iii) bioenergetics. Therefore, mitochondrial dysfunction mediated by anomalous tau modifications represents a novel mechanism by which these forms contribute to the pathogenesis of AD. In this review, we will discuss the main results reported on pathological tau modifications and their effects on mitochondrial function and their importance for the synaptic communication and neurodegeneration.
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Affiliation(s)
- María J Pérez
- Laboratory of Neurodegenerative Diseases, Universidad Autónoma de Chile, Santiago, Chile.,Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Claudia Jara
- Laboratory of Neurodegenerative Diseases, Universidad Autónoma de Chile, Santiago, Chile.,Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
| | - Rodrigo A Quintanilla
- Laboratory of Neurodegenerative Diseases, Universidad Autónoma de Chile, Santiago, Chile.,Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile
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108
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Teixeira J, Oliveira C, Cagide F, Amorim R, Garrido J, Borges F, Oliveira PJ. Discovery of a new mitochondria permeability transition pore (mPTP) inhibitor based on gallic acid. J Enzyme Inhib Med Chem 2018. [PMID: 29513043 PMCID: PMC6010063 DOI: 10.1080/14756366.2018.1442831] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Pharmacological interventions targeting mitochondria present several barriers for a complete efficacy. Therefore, a new mitochondriotropic antioxidant (AntiOxBEN3) based on the dietary antioxidant gallic acid was developed. AntiOxBEN3 accumulated several thousand-fold inside isolated rat liver mitochondria, without causing disruption of the oxidative phosphorylation apparatus, as seen by the unchanged respiratory control ratio, phosphorylation efficiency, and transmembrane electric potential. AntiOxBEN3 showed also limited toxicity on human hepatocarcinoma cells. Moreover, AntiOxBEN3 presented robust iron-chelation and antioxidant properties in both isolated liver mitochondria and cultured rat and human cell lines. Along with its low toxicity profile and high antioxidant activity, AntiOxBEN3 strongly inhibited the calcium-dependent mitochondrial permeability transition pore (mPTP) opening. From our data, AntiOxBEN3 can be considered as a lead compound for the development of a new class of mPTP inhibitors and be used as mPTP de-sensitiser for basic research or clinical applications or emerge as a therapeutic application in mitochondria dysfunction-related disorders.
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Affiliation(s)
- José Teixeira
- a CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Porto , Portugal.,b Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech , Cantanhede , Portugal
| | - Catarina Oliveira
- a CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Porto , Portugal
| | - Fernando Cagide
- a CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Porto , Portugal
| | - Ricardo Amorim
- a CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Porto , Portugal.,c PhD Programme in Experimental Biology and Biomedicine (PDBEB) , Center for Neuroscience and Cell Biology, University of Coimbra , Coimbra , Portugal.,d III-Institute for Interdisciplinary Research , University of Coimbra , Portugal
| | - Jorge Garrido
- e Department of Chemical Engineering, School of Engineering (ISEP) , Polytechnic Institute of Porto , Porto , Portugal
| | - Fernanda Borges
- a CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences , University of Porto , Porto , Portugal
| | - Paulo J Oliveira
- b Center for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech , Cantanhede , Portugal
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109
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Kedracka-Krok S, Swiderska B, Bielecka-Wajdman AM, Prus G, Skupien-Rabian B, Jankowska U, Obuchowicz E. Impact of imipramine on proteome of rat primary glial cells. J Neuroimmunol 2018; 320:25-37. [PMID: 29759138 DOI: 10.1016/j.jneuroim.2018.04.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 04/10/2018] [Indexed: 01/06/2023]
Abstract
Microglia and astrocytes, two types of glial cells are known to be important targets for antidepressant drugs. Here we used a comprehensive proteomic analysis to examine the effect of imipramine on rat primary mixed glial culture. The two-dimensional differential gel electrophoresis method allowed us to identify 62 proteins that were altered by imipramine. Functional analysis revealed that imipramine influenced the level of proteins involved in oxidative stress; in particular, it elevated the level of glutathione transferases. Imipramine upregulated proteins related to glycolysis but down-regulated many mitochondrial proteins including enzymes involved in oxidative phosphorylation. Mitochondrial dysfunction, especially decrease of mitochondrial membrane potential can be counted as a side effect triggered by imipramine. Imipramine induced lowering of chaperone level and alterations suggesting impaired protein synthesis could be associated with increased apoptosis. One of the most pronounced effect of imipramine is the reduction of vimentin level, this protein is engaged in majority of biological processes which were found to be affected by imipramine. Many imipramine regulated proteins, including chaperones, cathepsins and annexins are involved in immune responses. Additionally, imipramine influenced proteins associated with phagocytosis and cell migration. Overall these findings indicate that imipramine produces complex effect on glial cells, primarily on microglia and suggest their transition towards a more quiescent, metabolically less demanding phenotype.
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Affiliation(s)
- Sylwia Kedracka-Krok
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland.
| | - Bianka Swiderska
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | | | - Gabriela Prus
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Bozena Skupien-Rabian
- Department of Physical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland; Proteomics and Mass Spectrometry Laboratory, Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Urszula Jankowska
- Proteomics and Mass Spectrometry Laboratory, Malopolska Centre of Biotechnology, Jagiellonian University, Krakow, Poland
| | - Ewa Obuchowicz
- Department of Pharmacology, Medical University of Silesia, Katowice, Poland
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110
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Goldberg J, Currais A, Prior M, Fischer W, Chiruta C, Ratliff E, Daugherty D, Dargusch R, Finley K, Esparza‐Moltó PB, Cuezva JM, Maher P, Petrascheck M, Schubert D. The mitochondrial ATP synthase is a shared drug target for aging and dementia. Aging Cell 2018; 17:e12715. [PMID: 29316249 PMCID: PMC5847861 DOI: 10.1111/acel.12715] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2017] [Indexed: 12/31/2022] Open
Abstract
Aging is a major driving force underlying dementia, such as that caused by Alzheimer's disease (AD). While the idea of targeting aging as a therapeutic strategy is not new, it remains unclear how closely aging and age-associated diseases are coupled at the molecular level. Here, we discover a novel molecular link between aging and dementia through the identification of the molecular target for the AD drug candidate J147. J147 was developed using a series of phenotypic screening assays mimicking disease toxicities associated with the aging brain. We have previously demonstrated the therapeutic efficacy of J147 in several mouse models of AD. Here, we identify the mitochondrial α-F1 -ATP synthase (ATP5A) as a target for J147. By targeting ATP synthase, J147 causes an increase in intracellular calcium leading to sustained calcium/calmodulin-dependent protein kinase kinase β (CAMKK2)-dependent activation of the AMPK/mTOR pathway, a canonical longevity mechanism. Accordingly, modulation of mitochondrial processes by J147 prevents age-associated drift of the hippocampal transcriptome and plasma metabolome in mice and extends lifespan in drosophila. Our results link aging and age-associated dementia through ATP synthase, a molecular drug target that can potentially be exploited for the suppression of both. These findings demonstrate that novel screens for new AD drug candidates identify compounds that act on established aging pathways, suggesting an unexpectedly close molecular relationship between the two.
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Affiliation(s)
- Joshua Goldberg
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | - Antonio Currais
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | - Marguerite Prior
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | - Wolfgang Fischer
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | | | - Eric Ratliff
- Donald P. Shiley BioScience CenterSan Diego State UniversitySan DiegoCAUSA
| | - Daniel Daugherty
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | - Richard Dargusch
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | - Kim Finley
- Donald P. Shiley BioScience CenterSan Diego State UniversitySan DiegoCAUSA
| | | | - José M. Cuezva
- Centro de Biología MolecularCIBERER, Universidad Autónoma de MadridMadridSpain
| | - Pamela Maher
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
| | | | - David Schubert
- Cellular NeurobiologyThe Salk Institute for Biological StudiesLa JollaCAUSA
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111
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Perillyl alcohol alleviates amyloid-β peptides-induced mitochondrial dysfunction and cytotoxicity in SH-SY5Y cells. Int J Biol Macromol 2018; 109:1029-1038. [DOI: 10.1016/j.ijbiomac.2017.11.082] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/21/2017] [Accepted: 11/13/2017] [Indexed: 12/20/2022]
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112
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Olloquequi J, Cornejo-Córdova E, Verdaguer E, Soriano FX, Binvignat O, Auladell C, Camins A. Excitotoxicity in the pathogenesis of neurological and psychiatric disorders: Therapeutic implications. J Psychopharmacol 2018; 32:265-275. [PMID: 29444621 DOI: 10.1177/0269881118754680] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neurological and psychiatric disorders are leading contributors to the global disease burden, having a serious impact on the quality of life of both patients and their relatives. Although the molecular events underlying these heterogeneous diseases remain poorly understood, some studies have raised the idea of common mechanisms involved. In excitotoxicity, there is an excessive activation of glutamate receptors by excitatory amino acids, leading to neuronal damage. Thus, the excessive release of glutamate can lead to a dysregulation of Ca2+ homeostasis, triggering the production of free radicals and oxidative stress, mitochondrial dysfunction and eventually cell death. Although there is a consensus in considering excitotoxicity as a hallmark in most neurodegenerative diseases, increasing evidence points to the relevant role of this pathological mechanism in other illnesses affecting the central nervous system. Consequently, antagonists of glutamate receptors are used in current treatments or in clinical trials in both neurological and psychiatric disorders. However, drugs modulating other aspects of the excitotoxic mechanism could be more beneficial. This review discusses how excitotoxicity is involved in the pathogenesis of different neurological and psychiatric disorders and the promising strategies targeting the excitotoxic insult.
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Affiliation(s)
- Jordi Olloquequi
- 1 Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Talca, Chile
| | | | - Ester Verdaguer
- 3 Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat de Barcelona, Spain.,4 Biomedical Research Networking Centre in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.,5 Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Francesc X Soriano
- 3 Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat de Barcelona, Spain.,5 Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Octavio Binvignat
- 6 Laboratorio de Ciencias Morfológicas, Pontificia Universidad Católica de Valparaíso, Chile
| | - Carme Auladell
- 3 Departament de Biologia Cellular, Fisiologia i Immunologia, Universitat de Barcelona, Spain.,4 Biomedical Research Networking Centre in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.,5 Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
| | - Antoni Camins
- 4 Biomedical Research Networking Centre in Neurodegenerative Diseases (CIBERNED), Madrid, Spain.,5 Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain.,7 Departament de Farmacologia, Toxicologia i Química Terapèutica, Universitat de Barcelona, Spain
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113
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Sadhukhan P, Saha S, Dutta S, Mahalanobish S, Sil PC. Nutraceuticals: An emerging therapeutic approach against the pathogenesis of Alzheimer’s disease. Pharmacol Res 2018; 129:100-114. [PMID: 29183770 DOI: 10.1016/j.phrs.2017.11.028] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 11/22/2017] [Accepted: 11/22/2017] [Indexed: 01/01/2023]
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114
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Jha SK, Jha NK, Kumar D, Sharma R, Shrivastava A, Ambasta RK, Kumar P. Stress-Induced Synaptic Dysfunction and Neurotransmitter Release in Alzheimer's Disease: Can Neurotransmitters and Neuromodulators be Potential Therapeutic Targets? J Alzheimers Dis 2018; 57:1017-1039. [PMID: 27662312 DOI: 10.3233/jad-160623] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The communication between neurons at synaptic junctions is an intriguing process that monitors the transmission of various electro-chemical signals in the central nervous system. Albeit any aberration in the mechanisms associated with transmission of these signals leads to loss of synaptic contacts in both the neocortex and hippocampus thereby causing insidious cognitive decline and memory dysfunction. Compelling evidence suggests that soluble amyloid-β (Aβ) and hyperphosphorylated tau serve as toxins in the dysfunction of synaptic plasticity and aberrant neurotransmitter (NT) release at synapses consequently causing a cognitive decline in Alzheimer's disease (AD). Further, an imbalance between excitatory and inhibitory neurotransmission systems induced by impaired redox signaling and altered mitochondrial integrity is also amenable for such abnormalities. Defective NT release at the synaptic junction causes several detrimental effects associated with altered activity of synaptic proteins, transcription factors, Ca2+ homeostasis, and other molecules critical for neuronal plasticity. These detrimental effects further disrupt the normal homeostasis of neuronal cells and thereby causing synaptic loss. Moreover, the precise mechanistic role played by impaired NTs and neuromodulators (NMs) and altered redox signaling in synaptic dysfunction remains mysterious, and their possible interlink still needs to be investigated. Therefore, this review elucidates the intricate role played by both defective NTs/NMs and altered redox signaling in synaptopathy. Further, the involvement of numerous pharmacological approaches to compensate neurotransmission imbalance has also been discussed, which may be considered as a potential therapeutic approach in synaptopathy associated with AD.
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115
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The mycotoxin phomoxanthone A disturbs the form and function of the inner mitochondrial membrane. Cell Death Dis 2018; 9:286. [PMID: 29459714 PMCID: PMC5833434 DOI: 10.1038/s41419-018-0312-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 01/04/2018] [Indexed: 12/15/2022]
Abstract
Mitochondria are cellular organelles with crucial functions in the generation and distribution of ATP, the buffering of cytosolic Ca2+ and the initiation of apoptosis. Compounds that interfere with these functions are termed mitochondrial toxins, many of which are derived from microbes, such as antimycin A, oligomycin A, and ionomycin. Here, we identify the mycotoxin phomoxanthone A (PXA), derived from the endophytic fungus Phomopsis longicolla, as a mitochondrial toxin. We show that PXA elicits a strong release of Ca2+ from the mitochondria but not from the ER. In addition, PXA depolarises the mitochondria similarly to protonophoric uncouplers such as CCCP, yet unlike these, it does not increase but rather inhibits cellular respiration and electron transport chain activity. The respiration-dependent mitochondrial network structure rapidly collapses into fragments upon PXA treatment. Surprisingly, this fragmentation is independent from the canonical mitochondrial fission and fusion mediators DRP1 and OPA1, and exclusively affects the inner mitochondrial membrane, leading to cristae disruption, release of pro-apoptotic proteins, and apoptosis. Taken together, our results suggest that PXA is a mitochondrial toxin with a novel mode of action that might prove a useful tool for the study of mitochondrial ion homoeostasis and membrane dynamics.
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116
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Larrick JW, Larrick JW, Mendelsohn AR. ATP Synthase, a Target for Dementia and Aging? Rejuvenation Res 2018; 21:61-66. [DOI: 10.1089/rej.2018.2056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- James W. Larrick
- Panorama Research Institute, Sunnyvale, California
- Regenerative Sciences Institute, Sunnyvale, California
| | | | - Andrew R. Mendelsohn
- Panorama Research Institute, Sunnyvale, California
- Regenerative Sciences Institute, Sunnyvale, California
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117
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Yu Q, Fang D, Swerdlow RH, Yu H, Chen JX, Yan SS. Antioxidants Rescue Mitochondrial Transport in Differentiated Alzheimer's Disease Trans-Mitochondrial Cybrid Cells. J Alzheimers Dis 2018; 54:679-90. [PMID: 27567872 DOI: 10.3233/jad-160532] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Mitochondrial dysfunction and axonal degeneration are early pathological features of Alzheimer's disease (AD)-affected brains. The underlying mechanisms and strategies to rescue it have not been well elucidated. Here, we evaluated axonal mitochondrial transport and function in AD subject-derived mitochondria. We analyzed mitochondrial transport and kinetics in human trans-mitochondrial "cybrid" (cytoplasmic hybrid) neuronal cells whose mitochondria were derived from platelets of patients with sporadic AD and compared these AD cybrid cell lines with cybrid cell lines whose mitochondria were derived from age-matched, cognitively normal subjects. Human AD cybrid cell lines, when induced to differentiate, developed stunted projections. Mitochondrial transport and function within neuronal processes/axons was altered in AD-derived mitochondria. Antioxidants reversed deficits in axonal mitochondrial transport and function. These findings suggest that antioxidants may be able to mitigate the consequences of AD-associated mitochondrial dysfunction. The present study provides evidence of the cause/effect of AD specific mitochondrial defects, which significantly enhances our understanding of the AD pathogenesis and exploring the effective therapeutic strategy for AD.
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Affiliation(s)
- Qing Yu
- Department of Pharmacology and Toxicology, and Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS, USA.,State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Cheng Du, China
| | - Du Fang
- Department of Pharmacology and Toxicology, and Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS, USA
| | | | - Haiyang Yu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Cheng Du, China
| | - John Xi Chen
- Department of Neurology, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - Shirley ShiDu Yan
- Department of Pharmacology and Toxicology, and Higuchi Bioscience Center, School of Pharmacy, University of Kansas, Lawrence, KS, USA
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118
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Nissanka N, Moraes CT. Mitochondrial DNA damage and reactive oxygen species in neurodegenerative disease. FEBS Lett 2018; 592:728-742. [PMID: 29281123 DOI: 10.1002/1873-3468.12956] [Citation(s) in RCA: 252] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2017] [Revised: 12/06/2017] [Accepted: 12/19/2017] [Indexed: 12/12/2022]
Abstract
Mitochondria are essential organelles within the cell where most ATP is produced through oxidative phosphorylation (OXPHOS). A subset of the genes needed for this process are encoded by the mitochondrial DNA (mtDNA). One consequence of OXPHOS is the production of mitochondrial reactive oxygen species (ROS), whose role in mediating cellular damage, particularly in damaging mtDNA during ageing, has been controversial. There are subsets of neurons that appear to be more sensitive to ROS-induced damage, and mitochondrial dysfunction has been associated with several neurodegenerative disorders. In this review, we will discuss the current knowledge in the field of mtDNA and neurodegeneration, the debate about ROS as a pathological or beneficial contributor to neuronal function, bona fide mtDNA diseases, and insights from mouse models of mtDNA defects affecting the central nervous system.
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Affiliation(s)
- Nadee Nissanka
- Neuroscience Graduate Program, University of Miami Miller School of Medicine, FL, USA
| | - Carlos T Moraes
- Neuroscience Graduate Program, University of Miami Miller School of Medicine, FL, USA.,Department of Neurology, University of Miami Miller School of Medicine, FL, USA
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119
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Valenti D, Braidy N, De Rasmo D, Signorile A, Rossi L, Atanasov AG, Volpicella M, Henrion-Caude A, Nabavi SM, Vacca RA. Mitochondria as pharmacological targets in Down syndrome. Free Radic Biol Med 2018; 114:69-83. [PMID: 28838841 DOI: 10.1016/j.freeradbiomed.2017.08.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 12/17/2022]
Abstract
Mitochondria play a pivotal role in cellular energy-generating processes and are considered master regulators of cell life and death fate. Mitochondrial function integrates signalling networks in several metabolic pathways controlling neurogenesis and neuroplasticity. Indeed, dysfunctional mitochondria and mitochondrial-dependent activation of intracellular stress cascades are critical initiating events in many human neurodegenerative or neurodevelopmental diseases including Down syndrome (DS). It is well established that trisomy of human chromosome 21 can cause DS. DS is associated with neurodevelopmental delay, intellectual disability and early neurodegeneration. Recently, molecular mechanisms responsible for mitochondrial damage and energy deficits have been identified and characterized in several DS-derived human cells and animal models of DS. Therefore, therapeutic strategies targeting mitochondria could have great potential for new treatment regimens in DS. The purpose of this review is to highlight recent studies concerning mitochondrial impairment in DS, focusing on alterations of the molecular pathways controlling mitochondrial function. We will also discuss the effects and molecular mechanisms of naturally occurring and chemically synthetized drugs that exert neuroprotective effects through modulation of mitochondrial function and attenuation of oxidative stress. These compounds might represent novel therapeutic tools for the modulation of energy deficits in DS.
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Affiliation(s)
- Daniela Valenti
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Council of Research, Bari, Italy
| | - Nady Braidy
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Australia
| | - Domenico De Rasmo
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Council of Research, Bari, Italy
| | - Anna Signorile
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari, Italy
| | - Leonardo Rossi
- Department of Clinical and Experimental Medicine, University of Pisa, Italy
| | - A G Atanasov
- Institute of Genetics and Animal Breeding of the Polish Academy of Sciences, 05-552 Jastrzebiec, Poland; Department of Pharmacognosy, University of Vienna, 1090 Vienna, Austria; Department of Vascular Biology and Thrombosis Research, Center for Physiology and Pharmacology, Medical University of Vienna, 1090 Vienna, Austria
| | - Mariateresa Volpicella
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Alexandra Henrion-Caude
- INSERM U1163, Université Paris Descartes, Sorbonne Paris Cité, Institut Imagine, GenAtlas Platform, 24 Boulevard du Montparnasse, 75015 Paris, France
| | - S M Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - R A Vacca
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Council of Research, Bari, Italy.
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120
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Tapia-Rojas C, Mira RG, Torres AK, Jara C, Pérez MJ, Vergara EH, Cerpa W, Quintanilla RA. Alcohol consumption during adolescence: A link between mitochondrial damage and ethanol brain intoxication. Birth Defects Res 2017; 109:1623-1639. [DOI: 10.1002/bdr2.1172] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Accepted: 10/31/2017] [Indexed: 12/30/2022]
Affiliation(s)
- Cheril Tapia-Rojas
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
| | - Rodrigo G. Mira
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratorio de Función y Patología Neuronal, Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas; Pontificia Universidad Católica de Chile; Santiago 8331150 Chile
| | - Angie K. Torres
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
| | - Claudia Jara
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
| | - María José Pérez
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
| | - Erick H. Vergara
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
| | - Waldo Cerpa
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratorio de Función y Patología Neuronal, Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas; Pontificia Universidad Católica de Chile; Santiago 8331150 Chile
| | - Rodrigo A. Quintanilla
- Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA); Santiago Chile
- Laboratory of Neurodegenerative Diseases; Universidad Autónoma de Chile; Chile
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121
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Elkamhawy A, Park JE, Hassan AHE, Pae AN, Lee J, Park BG, Roh EJ. Synthesis and evaluation of 2-(3-arylureido)pyridines and 2-(3-arylureido)pyrazines as potential modulators of Aβ-induced mitochondrial dysfunction in Alzheimer's disease. Eur J Med Chem 2017; 144:529-543. [PMID: 29288949 DOI: 10.1016/j.ejmech.2017.12.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 11/09/2017] [Accepted: 12/13/2017] [Indexed: 10/18/2022]
Abstract
A series of 2-(3-arylureido)pyridines and 2-(3-benzylureido)pyridines were synthesized and evaluated as potential modulators for amyloid beta (Aβ)-induced mitochondrial dysfunction in Alzheimer's disease (AD). The blocking activities of forty one small molecules against Aβ-induced mitochondrial permeability transition pore (mPTP) opening were evaluated by JC-1 assay which measures the change of mitochondrial membrane potential (ΔΨm). The inhibitory activity of twenty five compounds against Aβ-induced mPTP opening was superior to that of the standard cyclosporin A (CsA). Six hit compounds have been identified as likely safe in regards to mitochondrial and cellular safety and subjected to assessment for their protective effect against Aβ-induced deterioration of ATP production and cytotoxicity. Among them, compound 7fb has been identified as a lead compound protecting neuronal cells against 67% of neurocytotoxicity and 43% of suppression of mitochondrial ATP production induced by 5 μM concentrations of Aβ. Using CDocker algorithm, a molecular docking model presented a plausible binding mode for these compounds with cyclophilin D (CypD) receptor as a major component of mPTP. Hence, this report presents compound 7fb as a new nonpeptidyl mPTP blocker which would be promising for further development of Alzheimer's disease (AD) therapeutics.
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Affiliation(s)
- Ahmed Elkamhawy
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Jung-Eun Park
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Ahmed H E Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt; Medicinal Chemistry Laboratory, Department of Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ae Nim Pae
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Jiyoun Lee
- Department of Global Medical Science, Sungshin Women's University, Seoul 01133, Republic of Korea
| | - Beoung-Geon Park
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; School of Life Sciences and Biotechnology, Korea University, Seoul 02792, Republic of Korea
| | - Eun Joo Roh
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea.
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122
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Uzhachenko R, Boyd K, Olivares-Villagomez D, Zhu Y, Goodwin JS, Rana T, Shanker A, Tan WJT, Bondar T, Medzhitov R, Ivanova AV. Mitochondrial protein Fus1/Tusc2 in premature aging and age-related pathologies: critical roles of calcium and energy homeostasis. Aging (Albany NY) 2017; 9:627-649. [PMID: 28351997 PMCID: PMC5391223 DOI: 10.18632/aging.101213] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 03/18/2017] [Indexed: 12/20/2022]
Abstract
Decreased energy production and increased oxidative stress are considered to be major contributors to aging and aging-associated pathologies. The role of mitochondrial calcium homeostasis has also been highlighted as an important factor affecting different pathological conditions. Here, we present evidence that loss of a small mitochondrial protein Fus1 that maintains mitochondrial homeostasis results in premature aging, aging-associated pathologies, and decreased survival. We showed that Fus1KO mice develop multiple early aging signs including lordokyphosis, lack of vigor, inability to accumulate fat, reduced ability to tolerate stress, and premature death. Other prominent pathological changes included low sperm counts, compromised ability of adult stem cells to repopulate tissues, and chronic inflammation. At the molecular level, we demonstrated that mitochondria of Fus1 KO cells have low reserve respiratory capacity (the ability to produce extra energy during sudden energy demanding situations), and show significantly altered dynamics of cellular calcium response. Our recent studies on early hearing and memory loss in Fus1 KO mice combined with the new data presented here suggest that calcium and energy homeostasis controlled by Fus1 may be at the core of its aging-regulating activities. Thus, Fus1 protein and Fus1-dependent pathways and processes may represent new tools and targets for anti-aging strategies.
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Affiliation(s)
- Roman Uzhachenko
- Department of Biochemistry and Cancer Biology, School of Medicine, Meharry Medical College, Nashville, TN 37208, USA
| | - Kelli Boyd
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Danyvid Olivares-Villagomez
- Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, TN 37232, USA
| | - Yueming Zhu
- Department of Radiation Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - J Shawn Goodwin
- Department of Biochemistry and Cancer Biology, School of Medicine, Meharry Medical College, Nashville, TN 37208, USA
| | - Tanu Rana
- Department of Biochemistry and Cancer Biology, School of Medicine, Meharry Medical College, Nashville, TN 37208, USA.,Present address: Division of Clinical Pharmacology, Vanderbilt University Medical Center, Nashville, TN 37235, USA
| | - Anil Shanker
- Department of Biochemistry and Cancer Biology, School of Medicine, Meharry Medical College, Nashville, TN 37208, USA.,Department of Surgery, Section of Otolaryngology, Yale University School of Medicine, New Haven, CT 0651, USA
| | - Winston J T Tan
- Department of Surgery, Section of Otolaryngology, Yale University School of Medicine, New Haven, CT 0651, USA
| | - Tanya Bondar
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 0651, USA
| | - Ruslan Medzhitov
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 0651, USA
| | - Alla V Ivanova
- Department of Surgery, Section of Otolaryngology, Yale University School of Medicine, New Haven, CT 0651, USA
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123
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Lebda MA, Sadek KM, El-Sayed YS. Aspartame and Soft Drink-Mediated Neurotoxicity in Rats: Implication of Oxidative Stress, Apoptotic Signaling Pathways, Electrolytes and Hormonal Levels. Metab Brain Dis 2017; 32:1639-1647. [PMID: 28660358 DOI: 10.1007/s11011-017-0052-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 06/16/2017] [Indexed: 01/06/2023]
Abstract
A significant association between fructose corn syrup in sweetened beverages consumption and increased risk of detrimental central nervous system effects has been recently reported. We hypothesized that the aspartame and soft drink induced disturbances in energy production and endocrine function, which play a role in the induction of brain damage. Therefore, we aimed to assess the effect of aspartame and soft drink on brain function and the link between energy status in the brain, oxidative stress and molecular pathways of apoptosis. Thirty rats were randomly assigned to drink water, aspartame (240 mg/kg orally) and cola soft drinks (free access) daily for two months. Subchronic intake of aspartame and soft drink significantly disrupted the brain energy production, as indicated by inhibited serum and brain creatine kinase, specifically in soft drink-received rats. Moreover, they substantially altered serum electrolytes (increased Ca and Na, and depleted Cu, Fe, Zn and K levels), and accordingly the related hormonal status (increased T4 and PTH, and lowered T3 and aldosterone levels), particularly in soft drink-received rats reflecting brain damage. Additionally, significant increment of acetylcholine esterase activity concomitant with the reduction of antioxidant molecules (SOD, CAT, GSH-Px and GSH), and induction of malondialdehyde level are precisely indicative of oxidative brain damage. Brain mRNA transcripts of target genes showed that aspartame and soft drink induced upregulation of BAX, Casp3, P27 and Mdm2 (1.5-fold) and down-regulation of Bcl2, suggesting an activation of cellular apoptosis. Collectively, subchronic aspartame and soft drink-induced brain damage in rats may be driven via a mechanism that involves energy production disruption, electrolytes and hormonal imbalance, increased oxidative stress and activation of molecular pathway of neuronal apoptosis.
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Affiliation(s)
- Mohamed A Lebda
- Department of Biochemistry, Faculty of Veterinary Medicine, Alexandria University, Edfina, 22758, Egypt
| | - Kadry M Sadek
- Department of Biochemistry, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt
| | - Yasser S El-Sayed
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt.
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124
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Park JE, Elkamhawy A, Hassan AHE, Pae AN, Lee J, Paik S, Park BG, Roh EJ. Synthesis and evaluation of new pyridyl/pyrazinyl thiourea derivatives: Neuroprotection against amyloid-β-induced toxicity. Eur J Med Chem 2017; 141:322-334. [PMID: 29031076 DOI: 10.1016/j.ejmech.2017.09.043] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/20/2017] [Accepted: 09/21/2017] [Indexed: 12/14/2022]
Abstract
Herein, we report synthesis and evaluation of new twenty six small molecules against β amyloid (Aβ)-induced opening of mitochondrial permeability transition pore (mPTP) using JC-1 assay which measures the change of mitochondrial membrane potential (ΔΨm). The neuroprotective effect of seventeen compounds against Aβ-induced mPTP opening was superior to that of the standard Cyclosporin A (CsA). Fifteen derivatives eliciting increased green to red fluorescence percentage less than 40.0% were evaluated for their impact on ATP production, cell viability and neuroprotection against Aβ-induced neuronal cell death. Among evaluated compounds, derivatives 9w, 9r and 9k had safe profile regarding ATP production and cell viability. In addition, they exhibited significant neuroprotection (69.3, 51.8 and 48.2% respectively). Molecular modeling study using CDocker algorithm predicted plausible binding modes explaining the elicited mPTP blocking activity. Hence, this study suggests compounds 9w, 9r and 9k as leads for further development of novel therapy to Alzheimer's disease.
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Affiliation(s)
- Jung-Eun Park
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Chemistry, Sogang University, Seoul 04107, Republic of Korea
| | - Ahmed Elkamhawy
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.
| | - Ahmed H E Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt; Medicinal Chemistry Laboratory, Department of Pharmacy, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea; Department of Life and Nonopharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Ae Nim Pae
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Jiyoun Lee
- Department of Global Medical Science, Sungshin Women's University, Seoul 142-732, Republic of Korea
| | - Sora Paik
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Department of Fundamental Pharmaceutical Sciences, College of Pharmacy, Kyung Hee University, Seoul, 02447, Republic of Korea
| | - Beoung-Geon Park
- Convergence Research Center for Diagnosis, Treatment and Care System of Dementia, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
| | - Eun Joo Roh
- Chemical Kinomics Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea; Division of Bio-Medical Science & Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea.
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125
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Rivera-Barahona A, Alonso-Barroso E, Pérez B, Murphy MP, Richard E, Desviat LR. Treatment with antioxidants ameliorates oxidative damage in a mouse model of propionic acidemia. Mol Genet Metab 2017; 122:43-50. [PMID: 28774709 DOI: 10.1016/j.ymgme.2017.07.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/24/2017] [Accepted: 07/24/2017] [Indexed: 12/16/2022]
Abstract
Oxidative stress contributes to the pathogenesis of propionic acidemia (PA), a life threatening disease caused by the deficiency of propionyl CoA-carboxylase, in the catabolic pathway of branched-chain amino acids, odd-number chain fatty acids and cholesterol. Patients develop multisystemic complications including seizures, extrapyramidal symptoms, basal ganglia deterioration, pancreatitis and cardiomyopathy. The accumulation of toxic metabolites results in mitochondrial dysfunction, increased reactive oxygen species and oxidative damage, all of which have been documented in patients' samples and in a hypomorphic mouse model. Here we set out to investigate whether treatment with a mitochondria-targeted antioxidant, MitoQ, or with the natural polyphenol resveratrol, which is reported to have antioxidant and mitochondrial activation properties, could ameliorate the altered redox status and its functional consequences in the PA mouse model. The results show that oral treatment with MitoQ or resveratrol decreases lipid peroxidation and the expression levels of DNA repair enzyme OGG1 in PA mouse liver, as well as inducing tissue-specific changes in the expression of antioxidant enzymes. Notably, treatment decreased the cardiac hypertrophy marker BNP that is found upregulated in the PA mouse heart. Overall, the results provide in vivo evidence to justify more in depth investigations of antioxidants as adjuvant therapy in PA.
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Affiliation(s)
- Ana Rivera-Barahona
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC, Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), CIBERER, IdiPaz, Universidad Autónoma, Madrid, Spain
| | - Esmeralda Alonso-Barroso
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC, Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), CIBERER, IdiPaz, Universidad Autónoma, Madrid, Spain
| | - Belén Pérez
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC, Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), CIBERER, IdiPaz, Universidad Autónoma, Madrid, Spain
| | - Michael P Murphy
- Medical Research Council-Mitochondrial Biology Unit, University of Cambridge, UK
| | - Eva Richard
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC, Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), CIBERER, IdiPaz, Universidad Autónoma, Madrid, Spain
| | - Lourdes R Desviat
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC, Centro de Diagnóstico de Enfermedades Moleculares (CEDEM), CIBERER, IdiPaz, Universidad Autónoma, Madrid, Spain.
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126
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Teixeira J, Cagide F, Benfeito S, Soares P, Garrido J, Baldeiras I, Ribeiro JA, Pereira CM, Silva AF, Andrade PB, Oliveira PJ, Borges F. Development of a Mitochondriotropic Antioxidant Based on Caffeic Acid: Proof of Concept on Cellular and Mitochondrial Oxidative Stress Models. J Med Chem 2017; 60:7084-7098. [DOI: 10.1021/acs.jmedchem.7b00741] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- José Teixeira
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
- CNC—Center
for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech
Building, Biocant Park, Cantanhede 3060-197, Portugal
| | - Fernando Cagide
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Sofia Benfeito
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Pedro Soares
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Jorge Garrido
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
- Department
of Chemical Engineering, School of Engineering (ISEP), Polytechnic Institute of Porto, Porto 4200-072, Portugal
| | - Inês Baldeiras
- Faculty
of Medicine, University of Coimbra, Coimbra 3004-504, Portugal
- Laboratory
of Neurochemistry, Coimbra University Hospital (CHUC), Coimbra 3000-075, Portugal
| | - José A. Ribeiro
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Carlos M. Pereira
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - António F. Silva
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
| | - Paula B. Andrade
- REQUIMTE/LAQV-Laboratory
of Pharmacognosy, Department of Chemistry, Faculty of Pharmacy, University of Porto, Porto 4050-313, Portugal
| | - Paulo J. Oliveira
- CNC—Center
for Neuroscience and Cell Biology, University of Coimbra, UC-Biotech
Building, Biocant Park, Cantanhede 3060-197, Portugal
| | - Fernanda Borges
- CIQUP/Department
of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Porto 4169-007, Portugal
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127
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Song SB, Jang SY, Kang HT, Wei B, Jeoun UW, Yoon GS, Hwang ES. Modulation of Mitochondrial Membrane Potential and ROS Generation by Nicotinamide in a Manner Independent of SIRT1 and Mitophagy. Mol Cells 2017; 40:503-514. [PMID: 28736426 PMCID: PMC5547220 DOI: 10.14348/molcells.2017.0081] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 06/15/2017] [Indexed: 12/31/2022] Open
Abstract
Nicotinamide (NAM) plays essential roles in physiology through facilitating NAD+ redox homeostasis. Importantly, at high doses, it protects cells under oxidative stresses, and has shown therapeutic effectiveness in a variety of disease conditions. In our previous studies, NAM lowered reactive oxygen species (ROS) levels and extended cellular life span in primary human cells. In the treated cells, levels of NAD+/NADH and SIRT1 activity increased, while mitochondrial content decreased through autophagy activation. The remaining mitochondria were marked with low superoxide levels and high membrane potentials (Δψm); we posited that the treatment of NAM induced an activation of mitophagy that is selective for depolarized mitochondria, which produce high levels of ROS. However, evidence for the selective mitophagy that is mediated by SIRT1 has never been provided. This study sought to explain the mechanisms by which NAM lowers ROS levels and increases Δψm. Our results showed that NAM and SIRT1 activation exert quite different effects on mitochondrial physiology. Furthermore, the changes in ROS and Δψm were not found to be mediated through autophagy or SIRT activation. Rather, NAM suppressed superoxide generation via a direct reduction of electron transport, and increased Δψm via suppression of mitochondrial permeability transition pore formation. Our results dissected the effects of cellular NAD+ redox modulation, and emphasized the importance of the NAD+/NADH ratio in the mitochondria as well as the cytosol in maintaining mitochondrial quality.
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Affiliation(s)
- Seon Beom Song
- Department of Life Science, University of Seoul, Seoul 02504,
Korea
| | - So-Young Jang
- Department of Life Science, University of Seoul, Seoul 02504,
Korea
| | - Hyun Tae Kang
- Department of Life Science, University of Seoul, Seoul 02504,
Korea
| | - Bie Wei
- Department of Life Science, University of Seoul, Seoul 02504,
Korea
| | - Un-woo Jeoun
- Department of Biomedical Science and Department of Biochemistry, Ajou University School of Medicine, Suwon 16499,
Korea
| | - Gye Soon Yoon
- Department of Biomedical Science and Department of Biochemistry, Ajou University School of Medicine, Suwon 16499,
Korea
| | - Eun Seong Hwang
- Department of Life Science, University of Seoul, Seoul 02504,
Korea
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128
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Xu R, Han M, Xu Y, Zhang X, Zhang C, Zhang D, Ji J, Wei Y, Wang S, Huang B, Chen A, Zhang Q, Li W, Sun T, Wang F, Li X, Wang J. Coiled-coil domain containing 109B is a HIF1α-regulated gene critical for progression of human gliomas. J Transl Med 2017; 15:165. [PMID: 28754121 PMCID: PMC5534085 DOI: 10.1186/s12967-017-1266-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 07/19/2017] [Indexed: 02/08/2023] Open
Abstract
Background The coiled-coil domain is a structural motif found in proteins that participate in a variety of biological processes. Aberrant expression of such proteins has been shown to be associated with the malignant behavior of human cancers. In this study, we investigated the role of a specific family member, coiled-coil domain containing 109B (CCDC109B), in human gliomas. Methods and results We confirmed that CCDC109B was highly expressed in high grade gliomas (HGG; WHO III–IV) using immunofluorescence, western blot analysis, immunohistochemistry (IHC) and open databases. Through Cox regression analysis of The Cancer Genome Atlas (TCGA) database, we found that the expression levels of CCDC109B were inversely correlated with patient overall survival and it could serve as a prognostic marker. Then, a serious of cell functional assays were performed in human glioma cell lines, U87MG and U251, which indicated that silencing of CCDC109B attenuated glioma proliferation and migration/invasion both in vitro and in vivo. Notably, IHC staining in primary glioma samples interestingly revealed localization of elevated CCDC109B expression in necrotic areas which are typically hypoxic. Moreover, small interfering RNA (siRNA) and specific inhibiters of HIF1α led to decreased expression of CCDC109B in vitro and in vivo. Transwell assay further showed that CCDC109B is a critical factor in mediating HIF1α-induced glioma cell migration and invasion. Conclusion Our study elucidated a role for CCDC109B as an oncogene and a prognostic marker in human gliomas. CCDC109B may provide a novel therapeutic target for the treatment of human glioma. Electronic supplementary material The online version of this article (doi:10.1186/s12967-017-1266-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ran Xu
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Mingzhi Han
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Yangyang Xu
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Xin Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Chao Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Di Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Jianxiong Ji
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Yuzhen Wei
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China.,Department of Neurosurgery, Jining No.1 People's Hospital, Jiankang Road, Jining, 272011, China
| | - Shuai Wang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Bin Huang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Anjing Chen
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Qing Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Wenjie Li
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China
| | - Tao Sun
- Ningxia Key Laboratory of Craniocerebral Diseases, Incubation Base of the National Key Laboratory, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Feng Wang
- Ningxia Key Laboratory of Craniocerebral Diseases, Incubation Base of the National Key Laboratory, Ningxia Medical University, Yinchuan, 750004, Ningxia, China
| | - Xingang Li
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China.
| | - Jian Wang
- Department of Neurosurgery, Qilu Hospital of Shandong University and Brain Science Research Institute, Shandong University, #107 Wenhua Xi Road, Jinan, 250012, China. .,Department of Biomedicine, University of Bergen, Jonas Lies vei 91, 5009, Bergen, Norway.
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129
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Daniele JR, Esping DJ, Garcia G, Parsons LS, Arriaga EA, Dillin A. "High-Throughput Characterization of Region-Specific Mitochondrial Function and Morphology". Sci Rep 2017; 7:6749. [PMID: 28751733 PMCID: PMC5532364 DOI: 10.1038/s41598-017-05152-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 05/24/2017] [Indexed: 11/09/2022] Open
Abstract
The tissue-specific etiology of aging and stress has been elusive due to limitations in data processing of current techniques. Despite that many techniques are high-throughput, they usually use singular features of the data (e.g. whole fluorescence). One technology at the nexus of fluorescence-based screens is large particle flow cytometry ("biosorter"), capable of recording positional fluorescence and object granularity information from many individual live animals. Current processing of biosorter data, however, do not integrate positional information into their analysis and data visualization. Here, we present a bioanalytical platform for the quantification of positional information ("longitudinal profiling") of C. elegans, which we posit embodies the benefits of both high-throughput screening and high-resolution microscopy. We show the use of these techniques in (1) characterizing distinct responses of a transcriptional reporter to various stresses in defined anatomical regions, (2) identifying regions of high mitochondrial membrane potential in live animals, (3) monitoring regional mitochondrial activity in aging models and during development, and (4) screening for regulators of muscle mitochondrial dynamics in a high-throughput format. This platform offers a significant improvement in the quality of high-throughput biosorter data analysis and visualization, opening new options for region-specific phenotypic screening of complex physiological phenomena and mitochondrial biology.
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Affiliation(s)
- Joseph R Daniele
- Department of Molecular & Cellular Biology, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
| | - Daniel J Esping
- Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Gilbert Garcia
- Department of Molecular & Cellular Biology, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
| | - Lee S Parsons
- Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Edgar A Arriaga
- Department of Chemistry, University of Minnesota, Minneapolis, MN, 55455, USA.
| | - Andrew Dillin
- Department of Molecular & Cellular Biology, University of California, Berkeley, Berkeley, CA, 94720-3370, USA
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130
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Korábečný J, Nepovimová E, Cikánková T, Špilovská K, Vašková L, Mezeiová E, Kuča K, Hroudová J. Newly Developed Drugs for Alzheimer's Disease in Relation to Energy Metabolism, Cholinergic and Monoaminergic Neurotransmission. Neuroscience 2017; 370:191-206. [PMID: 28673719 DOI: 10.1016/j.neuroscience.2017.06.034] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 06/20/2017] [Accepted: 06/21/2017] [Indexed: 11/18/2022]
Abstract
Current options for Alzheimer's disease (AD) treatment are based on administration of cholinesterase inhibitors (donepezil, rivastigmine, galantamine) and/or memantine, acting as an N-methyl-D-aspartate (NMDA). Therapeutic approaches vary and include novel cholinesterase inhibitors, modulators of NMDA receptors, monoamine oxidase (MAO) inhibitors, immunotherapeutics, modulators of mitochondrial permeability transition pores (mPTP), amyloid-beta binding alcohol dehydrogenase (ABAD) modulators, antioxidant agents, etc. The novel trends of AD therapy are focused on multiple targeted ligands, where mostly ChE inhibition is combined with additional biological properties, positively affecting neuronal energy metabolism as well as mitochondrial functions, and possessing antioxidant properties. The present review summarizes newly developed drugs targeting cholinesterase and MAO, as well as drugs affecting mitochondrial functions.
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Affiliation(s)
- Jan Korábečný
- Biomedical Research Centre, University Hospital Hradec Kralové, Sokolská 581, 500 05 Hradec Králové, Czech Republic; National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic
| | - Eugenie Nepovimová
- Biomedical Research Centre, University Hospital Hradec Kralové, Sokolská 581, 500 05 Hradec Králové, Czech Republic; Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic; Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Tereza Cikánková
- Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic
| | - Katarína Špilovská
- National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic; Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic; Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, Třebešská 1575, 500 01 Hradec Králové, Czech Republic
| | - Lucie Vašková
- Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic; Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Eva Mezeiová
- Biomedical Research Centre, University Hospital Hradec Kralové, Sokolská 581, 500 05 Hradec Králové, Czech Republic; National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic; Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic
| | - Kamil Kuča
- Biomedical Research Centre, University Hospital Hradec Kralové, Sokolská 581, 500 05 Hradec Králové, Czech Republic; Department of Chemistry, Faculty of Science, University of Hradec Králové, Rokitanského 62, 500 03 Hradec Králové, Czech Republic
| | - Jana Hroudová
- Department of Psychiatry, First Faculty of Medicine, Charles University and General University Hospital in Prague, Ke Karlovu 11, 120 00 Prague 2, Czech Republic; Institute of Pharmacology, First Faculty of Medicine, Charles University and General University Hospital in Prague, Albertov 4, 128 00 Prague 2, Czech Republic.
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131
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Terpyridyl oxovanadium(IV) complexes for DNA crosslinking and mito-targeted photocytotoxicity. J Inorg Biochem 2017; 174:45-54. [PMID: 28601723 DOI: 10.1016/j.jinorgbio.2017.05.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 05/27/2017] [Accepted: 05/30/2017] [Indexed: 12/29/2022]
Abstract
Oxovanadium(IV) complexes [VO(L1/L2)Cl2]n+ (1,2) of (anthracenyl)terpyridine (An-tpy as L1 in 1, n=0) and triphenylphosphonium-appended (anthracenyl)terpyridine (An-tpy-TPP+ as L2 in 2, n=1) were synthesized, characterized and their DNA crosslinking ability, photocytotoxicity in visible light and cellular localization in cancer cells studied. The bromide derivative of 2, viz. [VO(An-tpy-TPP)Br2]Br (3) is structurally characterized. The structure showed trans disposition of two halides in the coordination sphere and the TPP+ unit is a pendant to the terpyridyl ligand. The DNA melting and comet assay studies on the complexes suggest the formation of DNA crosslinks. Complexes 1 and 2 displayed ~10 fold increase in cytotoxicity on exposure to visible light (400-700nm) when compared to those in dark in HeLa and MCF-7 cells. FACScan (Fluorescence Associated Cell Sorter Scan) analysis showed cellular apoptosis when treated with the complex in visible light in comparison to their dark controls. Fluorescence microscopic studies using complex 2 revealed its mitochondrial localization within the cancer cells.
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132
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Alvariño R, Alonso E, Tribalat MA, Gegunde S, Thomas OP, Botana LM. Evaluation of the Protective Effects of Sarains on H 2O 2-Induced Mitochondrial Dysfunction and Oxidative Stress in SH-SY5Y Neuroblastoma Cells. Neurotox Res 2017; 32:368-380. [PMID: 28478531 DOI: 10.1007/s12640-017-9748-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/19/2017] [Accepted: 04/25/2017] [Indexed: 12/20/2022]
Abstract
Sarains are diamide alkaloids isolated from the Mediterranean sponge Haliclona (Rhizoniera) sarai that have previously shown antibacterial, insecticidal and anti-fouling activities. In this study, we examined for the first time the neuroprotective effects of sarains 1, 2 and A against oxidative stress in a human neuronal model. SH-SY5Y cells were co-incubated with sarains at concentrations ranging from 0.01 to 10 μM, and the well-known oxidant hydrogen peroxide at 150 μM for 6 h and the protective effects of the compounds were evaluated. Among the sarains tested, sarain A was the most promising compound, improving mitochondrial function and decreasing reactive oxygen species levels in human neuroblastoma cells treated with the compound at 0.01, 0.1 and 1 μM. This compound was also able to increase the activity of the antioxidant enzymes superoxide dismutases by inducing the translocation of the nuclear factor E2-related factor 2 (Nrf2) to the nucleus at the lower concentrations tested (0.01 and 0.1 μM). Moreover, sarain A at 0.1 and 1 μM blocked the mitochondrial permeability transition pore (mPTP) opening through cyclophilin D inhibition. These results suggest that the protective effects produced by the treatment with sarain A are related with its ability to block the mPTP and to enhance the Nrf2 pathway, indicating that sarain A may be a candidate compound for further studies in neurodegenerative diseases.
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Affiliation(s)
- Rebeca Alvariño
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27003, Lugo, Spain
| | - Eva Alonso
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27003, Lugo, Spain
| | - Marie-Aude Tribalat
- Géoazur UMR Université Nice Sophia Antipolis, 250 Avenue Albert Einstein, 06108, Nice, France
| | - Sandra Gegunde
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27003, Lugo, Spain
| | - Olivier P Thomas
- Géoazur UMR Université Nice Sophia Antipolis, 250 Avenue Albert Einstein, 06108, Nice, France.,Marine Biodiscovery, School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland
| | - Luis M Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27003, Lugo, Spain.
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133
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Félix LM, Correia F, Pinto PA, Campos SP, Fernandes T, Videira R, Oliveira M, Peixoto FP, Antunes LM. Propofol affinity to mitochondrial membranes does not alter mitochondrial function. Eur J Pharmacol 2017; 803:48-56. [DOI: 10.1016/j.ejphar.2017.03.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2016] [Revised: 03/17/2017] [Accepted: 03/21/2017] [Indexed: 01/11/2023]
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134
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Pérez MJ, Quintanilla RA. Development or disease: duality of the mitochondrial permeability transition pore. Dev Biol 2017; 426:1-7. [PMID: 28457864 DOI: 10.1016/j.ydbio.2017.04.018] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 04/26/2017] [Accepted: 04/26/2017] [Indexed: 12/29/2022]
Abstract
Mitochondria is not only a dynamic organelle that produces ATP, but is also an important contributor to cell functions in both development and cell death processes. These paradoxical functions of mitochondria are partially regulated by the mitochondrial permeability transition pore (mPTP), a high-conductance channel that can induce loss of mitochondrial membrane potential, impairment of cellular calcium homeostasis, oxidative stress, and a decrease in ATP production upon pathological activation. Interestingly, despite their different etiologies, several neurodegenerative diseases and heart ischemic injuries share mitochondrial dysfunction as a common element. Generally, mitochondrial impairment is triggered by calcium deregulation that could lead to mPTP opening and cell death. Several studies have shown that opening of the mPTP not only induces mitochondrial damage and cell death, but is also a physiological mechanism involved in different cellular functions. The mPTP participates in regular calcium-release mechanisms that are required for proper metabolic regulation; it is hypothesized that the transient opening of this structure could be the principal mediator of cardiac and brain development. The mPTP also plays a role in protecting against different brain and cardiac disorders in the elderly population. Therefore, the aim of this work was to discuss different studies that show this controversial characteristic of the mPTP; although mPTP is normally associated with several pathological events, new critical findings suggest its importance in mitochondrial function and cell development.
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Affiliation(s)
- María José Pérez
- Laboratory of Neurodegenerative Diseases, Universidad Autónoma de Chile, Santiago, Chile
| | - Rodrigo A Quintanilla
- Laboratory of Neurodegenerative Diseases, Universidad Autónoma de Chile, Santiago, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIAA), Santiago, Chile.
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135
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Elkamhawy A, Park JE, Hassan AH, Ra H, Pae AN, Lee J, Park BG, Moon B, Park HM, Roh EJ. Discovery of 1-(3-(benzyloxy)pyridin-2-yl)-3-(2-(piperazin-1-yl)ethyl)urea: A new modulator for amyloid beta-induced mitochondrial dysfunction. Eur J Med Chem 2017; 128:56-69. [DOI: 10.1016/j.ejmech.2016.12.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 12/15/2016] [Accepted: 12/29/2016] [Indexed: 10/20/2022]
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136
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Venegoni W, Shen Q, Thimmesch AR, Bell M, Hiebert JB, Pierce JD. The use of antioxidants in the treatment of traumatic brain injury. J Adv Nurs 2017; 73:1331-1338. [PMID: 28103389 DOI: 10.1111/jan.13259] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/02/2017] [Indexed: 11/26/2022]
Abstract
AIMS The aim of this study was to discuss secondary traumatic brain injury, the mitochondria and the use of antioxidants as a treatment. BACKGROUND One of the leading causes of death globally is traumatic brain injury, affecting individuals in all demographics. Traumatic brain injury is produced by an external blunt force or penetration resulting in alterations in brain function or pathology. Often, with a traumatic brain injury, secondary injury causes additional damage to the brain tissue that can have further impact on recovery and the quality of life. Secondary injury occurs when metabolic and physiologic processes alter after initial injury and includes increased release of toxic free radicals that cause damage to adjacent tissues and can eventually lead to neuronal necrosis. Although antioxidants in the tissues can reduce free radical damage, the magnitude of increased free radicals overwhelms the body's reduced defence mechanisms. Supplementing the body's natural supply of antioxidants, such as coenzyme Q10, can attenuate oxidative damage caused by reactive oxygen species. DESIGN Discussion paper. DATA SOURCES Research literature published from 2011-2016 in PubMed, CINAHL and Cochrane. IMPLICATIONS FOR NURSING Prompt and accurate assessment of patients with traumatic brain injury by nurses is important to ensure optimal recovery and reduced lasting disability. Thus, it is imperative that nurses be knowledgeable about the secondary injury that occurs after a traumatic brain injury and aware of possible antioxidant treatments. CONCLUSION The use of antioxidants has potential to reduce the magnitude of secondary injury in patients who experience a traumatic brain injury.
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Affiliation(s)
| | - Qiuhua Shen
- School of Nursing, University of Kansas, Kansas, USA
| | | | - Meredith Bell
- School of Nursing, University of Kansas, Kansas, USA
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137
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Bhosale G, Sharpe JA, Koh A, Kouli A, Szabadkai G, Duchen MR. Pathological consequences of MICU1 mutations on mitochondrial calcium signalling and bioenergetics. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:1009-1017. [PMID: 28132899 PMCID: PMC5424885 DOI: 10.1016/j.bbamcr.2017.01.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/20/2017] [Accepted: 01/21/2017] [Indexed: 01/07/2023]
Abstract
Loss of function mutations of the protein MICU1, a regulator of mitochondrial Ca2 + uptake, cause a neuronal and muscular disorder characterised by impaired cognition, muscle weakness and an extrapyramidal motor disorder. We have shown previously that MICU1 mutations cause increased resting mitochondrial Ca2+ concentration ([Ca2 +]m). We now explore the functional consequences of MICU1 mutations in patient derived fibroblasts in order to clarify the underlying pathophysiology of this disorder. We propose that deregulation of mitochondrial Ca2+ uptake through loss of MICU1 raises resting [Ca2+]m, initiating a futile Ca2+ cycle, whereby continuous mitochondrial Ca2+ influx is balanced by Ca2+ efflux through the sodium calcium exchanger (NLCXm). Thus, inhibition of NCLXm by CGP-37157 caused rapid mitochondrial Ca2+ accumulation in patient but not control cells. We suggest that increased NCLX activity will increase sodium/proton exchange, potentially undermining oxidative phosphorylation, although this is balanced by dephosphorylation and activation of pyruvate dehydrogenase (PDH) in response to the increased [Ca2+]m. Consistent with this model, while ATP content in patient derived or control fibroblasts was not different, ATP increased significantly in response to CGP-37157 in the patient but not the control cells. In addition, EMRE expression levels were altered in MICU1 patient cells compared to the controls. The MICU1 mutations were associated with mitochondrial fragmentation which we show is related to altered DRP1 phosphorylation. Thus, MICU1 serves as a signal–noise discriminator in mitochondrial calcium signalling, limiting the energetic costs of mitochondrial Ca2+ signalling which may undermine oxidative phosphorylation, especially in tissues with highly dynamic energetic demands. This article is part of a Special Issue entitled: ECS Meeting edited by Claus Heizmann, Joachim Krebs and Jacques Haiech. Loss of MICU1 protein expression in human fibroblasts increases resting mitochondrial calcium concentration ([Ca2+]m). The increased mitochondrial Ca2+ uptake causes a futile Ca2+ cycle in MICU1 deficient cells. Increased [Ca2+]mactivates pyruvate dehydrogenase (PDH) by activating PDH phosphatase, consequently dephosphorylating PDH. Loss of MICU1 leads to modifications of the MCU complex composition and mitochondrial fragmentation.
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Affiliation(s)
- Gauri Bhosale
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Jenny A Sharpe
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Amanda Koh
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Antonina Kouli
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Gyorgy Szabadkai
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom; Department of Biomedical Sciences, University of Padua, 35131 Padua, Italy
| | - Michael R Duchen
- Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, United Kingdom.
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138
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McKenzie M, Lim SC, Duchen MR. Simultaneous Measurement of Mitochondrial Calcium and Mitochondrial Membrane Potential in Live Cells by Fluorescent Microscopy. J Vis Exp 2017. [PMID: 28190045 DOI: 10.3791/55166] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Apart from their essential role in generating ATP, mitochondria also act as local calcium (Ca2+) buffers to tightly regulate intracellular Ca2+ concentration. To do this, mitochondria utilize the electrochemical potential across their inner membrane (ΔΨm) to sequester Ca2+. The influx of Ca2+ into the mitochondria stimulates three rate-limiting dehydrogenases of the citric acid cycle, increasing electron transfer through the oxidative phosphorylation (OXPHOS) complexes. This stimulation maintains ΔΨm, which is temporarily dissipated as the positive calcium ions cross the mitochondrial inner membrane into the mitochondrial matrix. We describe here a method for simultaneously measuring mitochondria Ca2+ uptake and ΔΨm in live cells using confocal microscopy. By permeabilizing the cells, mitochondrial Ca2+ can be measured using the fluorescent Ca2+ indicator Fluo-4, AM, with measurement of ΔΨm using the fluorescent dye tetramethylrhodamine, methyl ester, perchlorate (TMRM). The benefit of this system is that there is very little spectral overlap between the fluorescent dyes, allowing accurate measurement of mitochondrial Ca2+ and ΔΨm simultaneously. Using the sequential addition of Ca2+ aliquots, mitochondrial Ca2+ uptake can be monitored, and the concentration at which Ca2+ induces mitochondrial membrane permeability transition and the loss of ΔΨm determined.
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Affiliation(s)
- Matthew McKenzie
- Centre for Genetic Diseases, Hudson Institute of Medical Research; The Department of Molecular and Translational Sciences, Monash University;
| | - Sze C Lim
- Centre for Genetic Diseases, Hudson Institute of Medical Research
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139
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Areti A, Yerra VG, Komirishetty P, Kumar A. Potential Therapeutic Benefits of Maintaining Mitochondrial Health in Peripheral Neuropathies. Curr Neuropharmacol 2017; 14:593-609. [PMID: 26818748 PMCID: PMC4981743 DOI: 10.2174/1570159x14666151126215358] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2015] [Revised: 10/31/2015] [Accepted: 11/24/2015] [Indexed: 02/07/2023] Open
Abstract
Background: Peripheral neuropathies are a group of diseases characterized by malfunctioning of peripheral nervous system. Neuropathic pain, one of the core manifestations of peripheral neuropathy remains as the most severe disabling condition affecting the social and daily routine life of patients suffering from peripheral neuropathy. Method: The current review is aimed at unfolding the possible role of mitochondrial dysfunction in peripheral nerve damage and to discuss on the probable therapeutic strategies against neuronal mitotoxicity. The article also highlights the therapeutic significance of maintaining a healthy mitochondrial environment in neuronal cells via pharmacological management in context of peripheral neuropathies. Results: Aberrant cellular signaling coupled with changes in neurotransmission, peripheral and central sensitization are found to be responsible for the pathogenesis of variant toxic neuropathies. Current research reports have indicated the possible involvement of mitochondria mediated redox imbalance as one of the principal causes of neuropathy aetiologies. In addition to imbalance in redox homeostasis, mitochondrial dysfunction is also responsible for alterations in physiological bioenergetic metabolism, apoptosis and autophagy pathways. Conclusions: In spite of various etiological factors, mitochondrial dysfunction has been found to be a major pathomechanism underlying the neuronal dysfunction associated with peripheral neuropathies. Pharmacological modulation of mitochondria either directly or indirectly is expected to yield therapeutic relief from various primary and secondary mitochondrial diseases.
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Affiliation(s)
| | | | | | - Ashutosh Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER)-Hyderabad, Balanagar, Hyderabad, TG-500037.
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140
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Venediktova NI, Gorbacheva OS, Belosludtseva NV, Fedotova IB, Surina NM, Poletaeva II, Kolomytkin OV, Mironova GD. Energetic, oxidative and ionic exchange in rat brain and liver mitochondria at experimental audiogenic epilepsy (Krushinsky-Molodkina model). J Bioenerg Biomembr 2017; 49:149-158. [PMID: 28070860 DOI: 10.1007/s10863-016-9693-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Accepted: 12/30/2016] [Indexed: 01/02/2023]
Abstract
The role of brain and liver mitochondria at epileptic seizure was studied on Krushinsky-Molodkina (KM) rats which respond to sound with an intensive epileptic seizure (audiogenic epilepsy). We didn't find significant changes in respiration rats of brain and liver mitochondria of KM and control rats; however the efficiency of АТР synthesis in the KM rat mitochondria was 10% lower. In rats with audiogenic epilepsy the concentration of oxidative stress marker malondialdehyde in mitochondria of the brain (but not liver) was 2-fold higher than that in the control rats. The rate of H2O2 generation in brain mitochondria of КМ rats was twofold higher than in the control animals when using NAD-dependent substrates. This difference was less pronounced in liver mitochondria. In KM rats, the activity of mitochondrial ATP-dependent potassium channel was lower than in liver mitochondria of control rats. The comparative study of the mitochondria ability to retain calcium ions revealed that in the case of using the complex I and complex II substrates, permeability transition pore is easier to trigger in brain and liver mitochondria of KM and КМs rats than in the control ones. The role of the changes in the energetic, oxidative, and ionic exchange in the mechanism of audiogenic epilepsy generation in rats and the possible correction of the epilepsy seizures are discussed.
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Affiliation(s)
- Natalya I Venediktova
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Moscow Region, 142290, Russia.
| | - Olga S Gorbacheva
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Moscow Region, 142290, Russia
| | - Natalia V Belosludtseva
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Moscow Region, 142290, Russia
| | - Irina B Fedotova
- Biology Department, Laboratory for Physiology and Genetics of Behavior, Lomonosov Moscow State University, Leninskie Gory, 1, Build. 12, Moscow, 119992, Russia
| | - Natalia M Surina
- Biology Department, Laboratory for Physiology and Genetics of Behavior, Lomonosov Moscow State University, Leninskie Gory, 1, Build. 12, Moscow, 119992, Russia
| | - Inga I Poletaeva
- Biology Department, Laboratory for Physiology and Genetics of Behavior, Lomonosov Moscow State University, Leninskie Gory, 1, Build. 12, Moscow, 119992, Russia
| | - Oleg V Kolomytkin
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Moscow Region, 142290, Russia
| | - Galina D Mironova
- Institute of Theoretical and Experimental Biophysics RAS, Pushchino, Moscow Region, 142290, Russia
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141
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Arrázola MS, Ramos-Fernández E, Cisternas P, Ordenes D, Inestrosa NC. Wnt Signaling Prevents the Aβ Oligomer-Induced Mitochondrial Permeability Transition Pore Opening Preserving Mitochondrial Structure in Hippocampal Neurons. PLoS One 2017; 12:e0168840. [PMID: 28060833 PMCID: PMC5218554 DOI: 10.1371/journal.pone.0168840] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 11/05/2016] [Indexed: 12/21/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder mainly known for synaptic impairment and neuronal cell loss, affecting memory processes. Beside these damages, mitochondria have been implicated in the pathogenesis of AD through the induction of the mitochondrial permeability transition pore (mPTP). The mPTP is a non-selective pore that is formed under apoptotic conditions, disturbing mitochondrial structure and thus, neuronal viability. In AD, Aβ oligomers (Aβos) favor the opening of the pore, activating mitochondria-dependent neuronal cell death cascades. The Wnt signaling activated through the ligand Wnt3a has been described as a neuroprotective signaling pathway against amyloid-β (Aβ) peptide toxicity in AD. However, the mechanisms by which Wnt signaling prevents Aβos-induced neuronal cell death are unclear. We proposed here to study whether Wnt signaling protects neurons earlier than the late damages in the progression of the disease, through the preservation of the mitochondrial structure by the mPTP inhibition. To study specific events related to mitochondrial permeabilization we performed live-cell imaging from primary rat hippocampal neurons, and electron microscopy to analyze the mitochondrial morphology and structure. We report here that Wnt3a prevents an Aβos-induced cascade of mitochondrial events that leads to neuronal cell death. This cascade involves (a) mPTP opening, (b) mitochondrial swelling, (c) mitochondrial membrane potential loss and (d) cytochrome c release, thus leading to neuronal cell death. Furthermore, our results suggest that the activation of the Wnt signaling prevents mPTP opening by two possible mechanisms, which involve the inhibition of mitochondrial GSK-3β and/or the modulation of mitochondrial hexokinase II levels and activity. This study suggests a possible new approach for the treatment of AD from a mitochondrial perspective, and will also open new lines of study in the field of Wnt signaling in neuroprotection.
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Affiliation(s)
- Macarena S Arrázola
- Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Eva Ramos-Fernández
- Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Pedro Cisternas
- Universidad de Atacama, Facultad de Ciencias Naturales, Departamento de Química y Biología, Copiapó, Chile
| | - Daniela Ordenes
- Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Nibaldo C Inestrosa
- Centro de Envejecimiento y Regeneración (CARE), Departamento de Biología Celular y Molecular, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Healthy Brain Ageing, School of Psychiatry, Faculty of Medicine, University of New South Wales, Sydney, Australia
- Centro de Excelencia en Biomedicina de Magallanes (CEBIMA), Universidad de Magallanes, Punta Arenas, Chile
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142
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Yuan J, Zhang YM, Wu W, Ma W, Wang F. Effect of glycosides of Cistanche on the expression of mitochondrial precursor protein and keratin type II cytoskeletal 6A in a rat model of vascular dementia. Neural Regen Res 2017; 12:1152-1158. [PMID: 28852399 PMCID: PMC5558496 DOI: 10.4103/1673-5374.211196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Glycosides of Cistanche (GC) is a preparation used extensively for its neuroprotective effect against neurological diseases, but its mechanisms of action remains incompletely understood. Here, we established a bilateral common carotid artery occlusion model of vascular dementia in rats and injected the model rats with a suspension of GC (10 mg/kg/day, intraperitoneally) for 14 consecutive days. Immunohistochemistry showed that GC significantly reduced p-tau and amyloid beta (Aβ) immunoreactivity in the hippocampus of the model rats. Proteomic analysis demonstrated upregulation of mitochondrial precursor protein and downregulation of keratin type II cytoskeletal 6A after GC treatment compared with model rats that had received saline. Western blot assay confirmed these findings. Our results suggest that the neuroprotective effect of GC in vascular dementia occurs via the promotion of neuronal cytoskeleton regeneration.
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143
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144
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Progress in drug development for Alzheimer's disease: An overview in relation to mitochondrial energy metabolism. Eur J Med Chem 2016; 121:774-784. [DOI: 10.1016/j.ejmech.2016.03.084] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 01/21/2016] [Accepted: 03/26/2016] [Indexed: 12/27/2022]
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145
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Biasutto L, Azzolini M, Szabò I, Zoratti M. The mitochondrial permeability transition pore in AD 2016: An update. BIOCHIMICA ET BIOPHYSICA ACTA 2016; 1863:2515-30. [PMID: 26902508 DOI: 10.1016/j.bbamcr.2016.02.012] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/04/2016] [Accepted: 02/05/2016] [Indexed: 12/13/2022]
Abstract
Over the past 30years the mitochondrial permeability transition - the permeabilization of the inner mitochondrial membrane due to the opening of a wide pore - has progressed from being considered a curious artifact induced in isolated mitochondria by Ca(2+) and phosphate to a key cell-death-inducing process in several major pathologies. Its relevance is by now universally acknowledged and a pharmacology targeting the phenomenon is being developed. The molecular nature of the pore remains to this day uncertain, but progress has recently been made with the identification of the FOF1 ATP synthase as the probable proteic substrate. Researchers sharing this conviction are however divided into two camps: these believing that only the ATP synthase dimers or oligomers can form the pore, presumably in the contact region between monomers, and those who consider that the ring-forming c subunits in the FO sector actually constitute the walls of the pore. The latest development is the emergence of a new candidate: Spastic Paraplegia 7 (SPG7), a mitochondrial AAA-type membrane protease which forms a 6-stave barrel. This review summarizes recent developments of research on the pathophysiological relevance and on the molecular nature of the mitochondrial permeability transition pore. This article is part of a Special Issue entitled: Mitochondrial Channels edited by Pierre Sonveaux, Pierre Maechler and Jean-Claude Martinou.
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Affiliation(s)
- Lucia Biasutto
- CNR Neuroscience Institute, Viale G. Colombo 3, 35121 Padova, Italy; University of Padova, Department of Biomedical Sciences, Viale G. Colombo 3, 35121 Padova, Italy
| | - Michele Azzolini
- CNR Neuroscience Institute, Viale G. Colombo 3, 35121 Padova, Italy; University of Padova, Department of Biomedical Sciences, Viale G. Colombo 3, 35121 Padova, Italy
| | - Ildikò Szabò
- CNR Neuroscience Institute, Viale G. Colombo 3, 35121 Padova, Italy; University of Padova, Department of Biology, Viale G. Colombo 3, 35121 Padova, Italy
| | - Mario Zoratti
- CNR Neuroscience Institute, Viale G. Colombo 3, 35121 Padova, Italy; University of Padova, Department of Biomedical Sciences, Viale G. Colombo 3, 35121 Padova, Italy.
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146
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Hu H, Tan CC, Tan L, Yu JT. A Mitocentric View of Alzheimer's Disease. Mol Neurobiol 2016; 54:6046-6060. [PMID: 27696116 DOI: 10.1007/s12035-016-0117-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 09/12/2016] [Indexed: 12/14/2022]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease with an increasing morbidity, mortality, and economic cost. Plaques formed by amyloid beta peptide (Aβ) and neurofibrillary tangles formed by microtubule-associated protein tau are two main characters of AD. Though previous studies have focused on Aβ and tau and got some progressions on their toxicity mechanisms, no significantly effective treatments targeting the Aβ and tau have been found. However, it is worth noting that mounting evidences showed that mitochondrial dysfunction is an early event during the process of AD pathologic changes. What is more, these studies also showed an obvious association between mitochondrial dysfunction and Aβ/tau toxicity. Furthermore, both genetic and environmental factors may increase the oxidative stress and the mitochondria are also the sensitive target of ROS, which may form a vicious feedback between mitochondrial dysfunction and oxidative stress, eventually resulting in deficient energy, synaptic failure, and cell death. This article reviews the previous related studies from different aspects and concludes the critical roles of mitochondrial dysfunction in AD, suggesting a different route to AD therapy, which may guide the research and treatment direction.
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Affiliation(s)
- Hao Hu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China.
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China.
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147
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Quintanilla RA, Tapia C, Pérez MJ. Possible role of mitochondrial permeability transition pore in the pathogenesis of Huntington disease. Biochem Biophys Res Commun 2016; 483:1078-1083. [PMID: 27638306 DOI: 10.1016/j.bbrc.2016.09.054] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 07/14/2016] [Accepted: 09/12/2016] [Indexed: 01/08/2023]
Abstract
Huntington disease (HD) is a devastating neurological disorder that affects the striatum and cortex of patients. HD patients develop progressive motor dysfunction and psychiatric disturbances with gradual dementia. HD is caused by a pathological expansion of CAG repeats in the huntingtin gene that codifies for a protein called huntingtin (Htt), which principal function is not completely understood. Accumulative evidence shows that this pathological expansion modifies Htt function affecting different neuronal targets, including mitochondrial function which is an important factor that contributes to HD. Interestingly, several groups have shown mitochondrial disturbances including calcium handling defects, depolarization, decrease of mitochondrial transport, ATP reduction, and increase of reactive oxygen species (ROS) in cellular and murine HD models. Systematic analysis of this evidence indicates that a mitochondrial structure, the mitochondrial permeability transition pore (mPTP), could be responsible for these changes that affect mitochondria. The mPTP plays an important role in apoptosis and neurodegeneration. It has also been reported to have some physiological functions in heart development and synaptic communication. In HD, the presence of mutant huntingtin (mHtt) activates this mechanism producing a significant compromise of mitochondrial metabolism and bioenergetics. Considering these findings this review explores the evidence that suggests the important role of mPTP in the mitochondrial impairment induced by mHtt, which leads to calcium derangement and contributes to neuronal dysfunction in HD.
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Affiliation(s)
- Rodrigo A Quintanilla
- Laboratory of Neurodegenerative Diseases, CIB, Universidad Autónoma de Chile, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIIA), Santiago, Chile.
| | - Cheril Tapia
- Laboratory of Neurodegenerative Diseases, CIB, Universidad Autónoma de Chile, Chile; Centro de Investigación y Estudio del Consumo de Alcohol en Adolescentes (CIIA), Santiago, Chile
| | - María José Pérez
- Laboratory of Neurodegenerative Diseases, CIB, Universidad Autónoma de Chile, Chile
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148
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Ramsay RR, Majekova M, Medina M, Valoti M. Key Targets for Multi-Target Ligands Designed to Combat Neurodegeneration. Front Neurosci 2016; 10:375. [PMID: 27597816 PMCID: PMC4992697 DOI: 10.3389/fnins.2016.00375] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Accepted: 08/02/2016] [Indexed: 12/13/2022] Open
Abstract
HIGHLIGHTS Compounds that interact with multiple targets but minimally with the cytochrome P450 system (CYP) address the many factors leading to neurodegeneration.Acetyl- and Butyryl-cholineEsterases (AChE, BChE) and Monoamine Oxidases A/B (MAO A, MAO B) are targets for Multi-Target Designed Ligands (MTDL).ASS234 is an irreversible inhibitor of MAO A >MAO B and has micromolar potency against the cholinesterases.ASS234 is a poor CYP substrate in human liver, yielding the depropargylated metabolite.SMe1EC2, a stobadine derivative, showed high radical scavenging property, in vitro and in vivo giving protection in head trauma and diabetic damage of endothelium.Control of mitochondrial function and morphology by manipulating fission and fusion is emerging as a target area for therapeutic strategies to decrease the pathological outcome of neurodegenerative diseases. Growing evidence supports the view that neurodegenerative diseases have multiple and common mechanisms in their aetiologies. These multifactorial aspects have changed the broadly common assumption that selective drugs are superior to "dirty drugs" for use in therapy. This drives the research in studies of novel compounds that might have multiple action mechanisms. In neurodegeneration, loss of neuronal signaling is a major cause of the symptoms, so preservation of neurotransmitters by inhibiting the breakdown enzymes is a first approach. Acetylcholinesterase (AChE) inhibitors are the drugs preferentially used in AD and that one of these, rivastigmine, is licensed also for PD. Several studies have shown that monoamine oxidase (MAO) B, located mainly in glial cells, increases with age and is elevated in Alzheimer (AD) and Parkinson's Disease's (PD). Deprenyl, a MAO B inhibitor, significantly delays the initiation of levodopa treatment in PD patients. These indications underline that AChE and MAO are considered a necessary part of multi-target designed ligands (MTDL). However, both of these targets are simply symptomatic treatment so if new drugs are to prevent degeneration rather than compensate for loss of neurotransmitters, then oxidative stress and mitochondrial events must also be targeted. MAO inhibitors can protect neurons from apoptosis by mechanisms unrelated to enzyme inhibition. Understanding the involvement of MAO and other proteins in the induction and regulation of the apoptosis in mitochondria will aid progress toward strategies to prevent the loss of neurons. In general, the oxidative stress observed both in PD and AD indicate that antioxidant properties are a desirable part of MTDL molecules. After two or more properties are incorporated into one molecule, the passage from a lead compound to a therapeutic tool is strictly linked to its pharmacokinetic and toxicity. In this context the interaction of any new molecules with cytochrome P450 and other xenobiotic metabolic processes is a crucial point. The present review covers the biochemistry of enzymes targeted in the design of drugs against neurodegeneration and the cytochrome P450-dependent metabolism of MTDLs.
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Affiliation(s)
- Rona R. Ramsay
- Biomedical Sciences Research Complex, University of St. AndrewsSt. Andrews, UK
| | - Magdalena Majekova
- Department of Biochemical Pharmacology, Institute of Experimental Pharmacology and Toxicology, Slovak Academy of SciencesBratislava, Slovakia
| | - Milagros Medina
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias and BIFI, Universidad de ZaragozaZaragoza, Spain
| | - Massimo Valoti
- Dipartimento di Scienze della Vita, Università degli Studi di SienaSiena, Italy
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149
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Bose A, Beal MF. Mitochondrial dysfunction in Parkinson's disease. J Neurochem 2016; 139 Suppl 1:216-231. [PMID: 27546335 DOI: 10.1111/jnc.13731] [Citation(s) in RCA: 533] [Impact Index Per Article: 66.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 07/04/2016] [Accepted: 07/06/2016] [Indexed: 12/12/2022]
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disease. About 2% of the population above the age of 60 is affected by the disease. The pathological hallmarks of the disease include the loss of dopaminergic neurons in the substantia nigra and the presence of Lewy bodies that are made of α-synuclein. Several theories have been suggested for the pathogenesis of PD, of which mitochondrial dysfunction plays a pivotal role in both sporadic and familial forms of the disease. Dysfunction of the mitochondria that is caused by bioenergetic defects, mutations in mitochondrial DNA, nuclear DNA gene mutations linked to mitochondria, and changes in dynamics of the mitochondria such fusion or fission, changes in size and morphology, alterations in trafficking or transport, altered movement of mitochondria, impairment of transcription, and the presence of mutated proteins associated with mitochondria are implicated in PD. In this review, we provide a detailed overview of the mechanisms that can cause mitochondrial dysfunction in PD. We bring to the forefront, new signaling pathways such as the retromer-trafficking pathway and its implication in the disease and also provide a brief overview of therapeutic strategies to improve mitochondrial defects in PD. Bioenergetic defects, mutations in mitochondrial DNA, nuclear DNA gene mutations, alterations in mitochondrial dynamics, alterations in trafficking/transport and mitochondrial movement, abnormal size and morphology, impairment of transcription and the presence of mutated proteins associated with mitochondria are implicated in PD. In this review, we focus on the mechanisms underlying mitochondrial dysfunction in PD and bring to the forefront new signaling pathways that may be involved in PD. We also provide an overview of therapeutic strategies to improve mitochondrial defects in PD. This article is part of a special issue on Parkinson disease.
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Affiliation(s)
- Anindita Bose
- Appel Alzheimer's Disease Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, New York City, New York, USA.
| | - M Flint Beal
- Brain and Mind Research Institute, Weill Cornell Medicine, New York City, New York, USA.
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150
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Sun J, Jacobs KM. Knockout of Cyclophilin-D Provides Partial Amelioration of Intrinsic and Synaptic Properties Altered by Mild Traumatic Brain Injury. Front Syst Neurosci 2016; 10:63. [PMID: 27489538 PMCID: PMC4951523 DOI: 10.3389/fnsys.2016.00063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 07/07/2016] [Indexed: 01/01/2023] Open
Abstract
Mitochondria are central to cell survival and Ca2+ homeostasis due to their intracellular buffering capabilities. Mitochondrial dysfunction resulting in mitochondrial permeability transition pore (mPTP) opening has been reported after mild traumatic brain injury (mTBI). Cyclosporine A provides protection against the mPTP opening through its interaction with cyclophilin-D (CypD). A recent study has found that the extent of axonal injury after mTBI was diminished in neocortex in cyclophilin-D knockout (CypDKO) mice. Here we tested whether this CypDKO could also provide protection from the increased intrinsic and synaptic neuronal excitability previously described after mTBI in a mild central fluid percussion injury mice model. CypDKO mice were crossed with mice expressing yellow fluorescent protein (YFP) in layer V pyramidal neurons in neocortex to create CypDKO/YFP-H mice. Whole cell patch clamp recordings from axotomized (AX) and intact (IN) YFP+ layer V pyramidal neurons were made 1 and 2 days after sham or mTBI in slices from CypDKO/YFP-H mice. Both excitatory post synaptic currents (EPSCs) recorded in voltage clamp and intrinsic cellular properties, including action potential (AP), afterhyperpolarization (AHP), and depolarizing after potential (DAP) characteristics recorded in current clamp were evaluated. There was no significant difference between sham and mTBI for either spontaneous or miniature EPSC frequency, suggesting that CypDKO ameliorates excitatory synaptic abnormalities. There was a partial amelioration of intrinsic properties altered by mTBI. Alleviated were the increased slope of the AP frequency vs. injected current plot, the increased AP, AHP and DAP amplitudes. Other properties that saw a reversal that became significant in the opposite direction include the current rheobase and AP overshoot. The AP threshold remained depolarized and the input resistance remained increased in mTBI compared to sham. Additional altered properties suggest that the CypDKO likely has a direct effect on membrane properties, rather than producing a selective reduction of the effects of mTBI. These results suggest that inhibiting CypD after TBI is an effective strategy to reduce synaptic hyperexcitation, making it a continued target for potential treatment of network abnormalities.
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Affiliation(s)
- Jianli Sun
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Richmond, VA, USA
| | - Kimberle M Jacobs
- Department of Anatomy and Neurobiology, Virginia Commonwealth University Richmond, VA, USA
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