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Lee J, Pye N, Ellis L, Vos KD, Mortiboys H. Evidence of mitochondrial dysfunction in ALS and methods for measuring in model systems. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2024; 176:269-325. [PMID: 38802177 DOI: 10.1016/bs.irn.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Metabolic dysfunction is a hallmark of multiple amyotrophic lateral sclerosis (ALS) models with a majority of ALS patients exhibiting hypermetabolism. The central sites of metabolism in the cell are mitochondria, capable of utilising a multitude of cellular substrates in an array of ATP-generating reactions. With reactive oxygen species (ROS) production occurring during some of these reactions, mitochondria can contribute considerably to oxidative stress. Mitochondria are also very dynamic organelles, interacting with other organelles, undergoing fusion/fission in response to changing metabolic states and being turned over by the cell regularly. Disruptions to many of these mitochondrial functions and processes have been reported in ALS models, largely indicating compromised mitochondrial function, increased ROS production by mitochondria, disrupted interactions with the endoplasmic reticulum and reduced turnover. This chapter summarises methods routinely used to assess mitochondria in ALS models and the alterations that have been reported in these models.
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Affiliation(s)
- James Lee
- Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, United Kingdom
| | - Natalie Pye
- Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, United Kingdom
| | - Laura Ellis
- Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, United Kingdom
| | - Kurt De Vos
- Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, United Kingdom
| | - Heather Mortiboys
- Sheffield Institute for Translational Neuroscience, School of Medicine and Population Health, University of Sheffield, Sheffield, United Kingdom.
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2
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Campesan S, Del Popolo I, Marcou K, Straatman-Iwanowska A, Repici M, Boytcheva KV, Cotton VE, Allcock N, Rosato E, Kyriacou CP, Giorgini F. Bypassing mitochondrial defects rescues Huntington's phenotypes in Drosophila. Neurobiol Dis 2023; 185:106236. [PMID: 37495179 DOI: 10.1016/j.nbd.2023.106236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 07/06/2023] [Accepted: 07/22/2023] [Indexed: 07/28/2023] Open
Abstract
Huntington's disease (HD) is a fatal neurodegenerative disease with limited treatment options. Human and animal studies have suggested that metabolic and mitochondrial dysfunctions contribute to HD pathogenesis. Here, we use high-resolution respirometry to uncover defective mitochondrial oxidative phosphorylation and electron transfer capacity when a mutant huntingtin fragment is targeted to neurons or muscles in Drosophila and find that enhancing mitochondrial function can ameliorate these defects. In particular, we find that co-expression of parkin, an E3 ubiquitin ligase critical for mitochondrial dynamics and homeostasis, produces significant enhancement of mitochondrial respiration when expressed either in neurons or muscles, resulting in significant rescue of neurodegeneration, viability and longevity in HD model flies. Targeting mutant HTT to muscles results in larger mitochondria and higher mitochondrial mass, while co-expression of parkin increases mitochondrial fission and decreases mass. Furthermore, directly addressing HD-mediated defects in the fly's mitochondrial electron transport system, by rerouting electrons to either bypass mitochondrial complex I or complexes III-IV, significantly increases mitochondrial respiration and results in a striking rescue of all phenotypes arising from neuronal mutant huntingtin expression. These observations suggest that bypassing impaired mitochondrial respiratory complexes in HD may have therapeutic potential for the treatment of this devastating disorder.
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Affiliation(s)
- Susanna Campesan
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK.
| | - Ivana Del Popolo
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Kyriaki Marcou
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Anna Straatman-Iwanowska
- Electron Microscopy Facility, Core Biotechnology Services, Adrian Building, University of Leicester, University Road, Leicester LE1 7RH, Leicestershire, UK
| | - Mariaelena Repici
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK; School of Life and Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, UK
| | - Kalina V Boytcheva
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Victoria E Cotton
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Natalie Allcock
- Electron Microscopy Facility, Core Biotechnology Services, Adrian Building, University of Leicester, University Road, Leicester LE1 7RH, Leicestershire, UK
| | - Ezio Rosato
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Charalambos P Kyriacou
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK
| | - Flaviano Giorgini
- Department of Genetics and Genome Biology, University of Leicester, Leicester LE1 7RH, UK.
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3
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Magrì A, Lipari CLR, Risiglione P, Zimbone S, Guarino F, Caccamo A, Messina A. ERK1/2-dependent TSPO overactivation associates with the loss of mitophagy and mitochondrial respiration in ALS. Cell Death Dis 2023; 14:122. [PMID: 36792609 PMCID: PMC9931716 DOI: 10.1038/s41419-023-05643-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 02/17/2023]
Abstract
Mitochondrial dysfunction and the loss of mitophagy, aimed at recycling irreversibly damaged organelles, contribute to the onset of amyotrophic lateral sclerosis (ALS), a fatal neurodegenerative disease affecting spinal cord motor neurons. In this work, we showed that the reduction of mitochondrial respiration, exactly oxygen flows linked to ATP production and maximal capacity, correlates with the appearance of the most common ALS motor symptoms in a transgenic mouse model expressing SOD1 G93A mutant. This is the result of the equal inhibition in the respiration linked to complex I and II of the electron transport chain, but not their protein levels. Since the overall mitochondrial mass was unvaried, we investigated the expression of the Translocator Protein (TSPO), a small mitochondrial protein whose overexpression was recently linked to the loss of mitophagy in a model of Parkinson's disease. Here we clearly showed that levels of TSPO are significantly increased in ALS mice. Mechanistically, this increase is linked to the overactivation of ERK1/2 pathway and correlates with a decrease in the expression of the mitophagy-related marker Atg12, indicating the occurrence of impairments in the activation of mitophagy. Overall, our work sets out TSPO as a key regulator of mitochondrial homeostasis in ALS.
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Affiliation(s)
- Andrea Magrì
- grid.8158.40000 0004 1757 1969Department of Biological, Geological and Environmental Sciences, University of Catania, Catania, Italy ,we.MitoBiotech S.R.L., C.so Italia 172, Catania, Italy
| | - Cristiana Lucia Rita Lipari
- grid.8158.40000 0004 1757 1969Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Pierpaolo Risiglione
- grid.8158.40000 0004 1757 1969Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Stefania Zimbone
- grid.5326.20000 0001 1940 4177Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Section of Catania, Catania, Italy
| | - Francesca Guarino
- we.MitoBiotech S.R.L., C.so Italia 172, Catania, Italy ,grid.8158.40000 0004 1757 1969Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Antonella Caccamo
- grid.8158.40000 0004 1757 1969Department of Drug and Health Sciences, University of Catania, Catania, Italy ,grid.10438.3e0000 0001 2178 8421Department of Chemical, Biological, Pharmaceutical Sciences, University of Messina, Messina, Italy
| | - Angela Messina
- Department of Biological, Geological and Environmental Sciences, University of Catania, Catania, Italy. .,we.MitoBiotech S.R.L., C.so Italia 172, Catania, Italy.
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4
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Ali MZ, Dholaniya PS. Oxidative phosphorylation mediated pathogenesis of Parkinson's disease and its implication via Akt signaling. Neurochem Int 2022; 157:105344. [PMID: 35483538 DOI: 10.1016/j.neuint.2022.105344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 04/19/2022] [Accepted: 04/21/2022] [Indexed: 12/21/2022]
Abstract
Substantia Nigra Pars-compacta (SNpc), in the basal ganglion region, is a primary source of dopamine release. These dopaminergic neurons require more energy than other neurons, as they are highly arborized and redundant. Neurons meet most of their energy demand (∼90%) from mitochondria. Oxidative phosphorylation (OxPhos) is the primary pathway for energy production. Many genes involved in Parkinson's disease (PD) have been associated with OxPhos, especially complex I. Abrogation in complex I leads to reduced ATP formation in these neurons, succumbing to death by inducing apoptosis. This review discusses the interconnection between complex I-associated PD genes and specific mitochondrial metabolic factors (MMFs) of OxPhos. Interestingly, all the complex I-associated PD genes discussed here have been linked to the Akt signaling pathway; thus, neuron survival is promoted and smooth mitochondrial function is ensured. Any changes in these genes disrupt the Akt pathway, which hampers the opening of the permeability transition pore (PTP) via GSK3β dephosphorylation; promotes destabilization of OxPhos; and triggers the release of pro-apoptotic factors.
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Affiliation(s)
- Md Zainul Ali
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, 500 046, India
| | - Pankaj Singh Dholaniya
- Department of Biotechnology and Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, 500 046, India.
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Mechanistic Insights of Mitochondrial Dysfunction in Amyotrophic Lateral Sclerosis: An Update on a Lasting Relationship. Metabolites 2022; 12:metabo12030233. [PMID: 35323676 PMCID: PMC8951432 DOI: 10.3390/metabo12030233] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/07/2022] [Accepted: 03/08/2022] [Indexed: 02/01/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by progressive loss of the upper and lower motor neurons. Despite the increasing effort in understanding the etiopathology of ALS, it still remains an obscure disease, and no therapies are currently available to halt its progression. Following the discovery of the first gene associated with familial forms of ALS, Cu–Zn superoxide dismutase, it appeared evident that mitochondria were key elements in the onset of the pathology. However, as more and more ALS-related genes were discovered, the attention shifted from mitochondria impairment to other biological functions such as protein aggregation and RNA metabolism. In recent years, mitochondria have again earned central, mechanistic roles in the pathology, due to accumulating evidence of their derangement in ALS animal models and patients, often resulting in the dysregulation of the energetic metabolism. In this review, we first provide an update of the last lustrum on the molecular mechanisms by which the most well-known ALS-related proteins affect mitochondrial functions and cellular bioenergetics. Next, we focus on evidence gathered from human specimens and advance the concept of a cellular-specific mitochondrial “metabolic threshold”, which may appear pivotal in ALS pathogenesis.
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Cha SJ, Kim K. Effects of the Edaravone, a Drug Approved for the Treatment of Amyotrophic Lateral Sclerosis, on Mitochondrial Function and Neuroprotection. Antioxidants (Basel) 2022; 11:antiox11020195. [PMID: 35204078 PMCID: PMC8868074 DOI: 10.3390/antiox11020195] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 01/13/2022] [Accepted: 01/19/2022] [Indexed: 01/27/2023] Open
Abstract
Edaravone, the first known free radical scavenger, has demonstrated cellular protective properties in animals and humans. Owing to its antioxidant activity, edaravone modulates oxidative damage in various diseases, especially neurodegenerative diseases. In 2015, edaravone was approved in Japan to treat amyotrophic lateral sclerosis. The distinguishing pathogenic features of neurodegenerative diseases include high reactive oxygen species levels and mitochondrial dysfunction. However, the correlation between mitochondria and edaravone has not been elucidated. This review highlights recent studies on novel therapeutic perspectives of edaravone in terms of its effect on oxidative stress and mitochondrial function.
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Affiliation(s)
- Sun Joo Cha
- Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea;
| | - Kiyoung Kim
- Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea;
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea
- Correspondence: ; Tel.: +82-41-413-5024; Fax: +82-41-413-5006
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7
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Choi HJ, Lee JY, Cha SJ, Han YJ, Yoon JH, Kim HJ, Kim K. FUS-induced neurotoxicity is prevented by inhibiting GSK-3β in a drosophila model of amyotrophic lateral sclerosis. Hum Mol Genet 2021; 31:850-862. [PMID: 34605896 DOI: 10.1093/hmg/ddab290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 09/12/2021] [Accepted: 09/29/2021] [Indexed: 11/13/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS)-linked mutations in fused in sarcoma (FUS) lead to the formation of cytoplasmic aggregates in neurons. They are believed play a critical role in the pathogenesis of FUS-associated ALS. Therefore, the clearance and degradation of cytoplasmic FUS aggregates in neurons may be considered a therapeutic strategy for ALS. However, the molecular pathogenic mechanisms behind FUS-associated ALS remain poorly understood. Here, we report GSK-3β as a potential modulator of FUS-induced toxicity. We demonstrated that RNAi-mediated knockdown of Drosophila ortholog Shaggy in FUS-expressing flies suppresses defective phenotypes, including retinal degeneration, motor defects, motor neuron degeneration, and mitochondrial dysfunction. Furthermore, we found that cytoplasmic FUS aggregates were significantly reduced by Shaggy knockdown. In addition, we found that the levels of FUS proteins were significantly reduced by co-overexpression of Slimb, a F-box protein, in FUS-expressing flies, indicating that Slimb is critical for the suppressive effect of Shaggy/GSK-3β inhibition on FUS-induced toxicity in Drosophila. These findings revealed a novel mechanism of neuronal protective effect through SCFSlimb-mediated FUS degradation via GSK-3β inhibition, and provided in vivo evidence of the potential for modulating FUS-induced ALS progression using GSK-3β inhibitors.
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Affiliation(s)
- Hyun-Jun Choi
- Soonchunhyang Institute of Medi-bio Science, Soonchunhyang University, Cheonan 31151, Korea.,Department of Integrated Biomedical Sciences, Soonchunhyang University, Cheonan 31151, Korea
| | - Ji Young Lee
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea
| | - Sun Joo Cha
- Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Yeo Jeong Han
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea.,Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
| | - Ja Hoon Yoon
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea
| | - Hyung-Jun Kim
- Dementia Research Group, Korea Brain Research Institute (KBRI), Daegu 41068, Korea
| | - Kiyoung Kim
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Korea.,Department of Medical Sciences, Soonchunhyang University, Asan 31538, Korea
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8
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Liguori F, Amadio S, Volonté C. Fly for ALS: Drosophila modeling on the route to amyotrophic lateral sclerosis modifiers. Cell Mol Life Sci 2021; 78:6143-6160. [PMID: 34322715 PMCID: PMC11072332 DOI: 10.1007/s00018-021-03905-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 12/11/2022]
Abstract
Amyotrophic lateral sclerosis (ALS) is a rare, devastating disease, causing movement impairment, respiratory failure and ultimate death. A plethora of genetic, cellular and molecular mechanisms are involved in ALS signature, although the initiating causes and progressive pathological events are far from being understood. Drosophila research has produced seminal discoveries for more than a century and has been successfully used in the past 25 years to untangle the process of ALS pathogenesis, and recognize potential markers and novel strategies for therapeutic solutions. This review will provide an updated view of several ALS modifiers validated in C9ORF72, SOD1, FUS, TDP-43 and Ataxin-2 Drosophila models. We will discuss basic and preclinical findings, illustrating recent developments and novel breakthroughs, also depicting unsettled challenges and limitations in the Drosophila-ALS field. We intend to stimulate a renewed debate on Drosophila as a screening route to identify more successful disease modifiers and neuroprotective agents.
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Affiliation(s)
- Francesco Liguori
- Preclinical Neuroscience, IRCCS Fondazione Santa Lucia, Via del Fosso di Fiorano 65, 00143, Rome, Italy
| | - Susanna Amadio
- Preclinical Neuroscience, IRCCS Fondazione Santa Lucia, Via del Fosso di Fiorano 65, 00143, Rome, Italy
| | - Cinzia Volonté
- Preclinical Neuroscience, IRCCS Fondazione Santa Lucia, Via del Fosso di Fiorano 65, 00143, Rome, Italy.
- Institute for Systems Analysis and Computer Science "A. Ruberti", National Research Council (IASI-CNR), Via dei Taurini 19, 00185, Rome, Italy.
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9
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Mitochondrial dysfunction and traffic jams in amyotrophic lateral sclerosis. Mitochondrion 2021; 58:102-110. [PMID: 33639271 DOI: 10.1016/j.mito.2021.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/07/2021] [Accepted: 02/12/2021] [Indexed: 12/11/2022]
Abstract
Neurodegenerative diseases are characterized by progressive neuronal loss anatomically or physiologically and accumulation of protein in the cells. Mitochondria provide energy to these neuronal cells consuming 20% of the body's oxygen. Mitochondria are the dynamic membrane-bound cell organelles that function to generate ATP, regulate calcium homeostasis, and produce reactive oxygen species. Because of alterations in the electron transport chain, mutation, and environmental toxins, there is reduced ATP production, calcium dyshomeostasis, and increased oxidative stress, resulting in mitochondrial dysfunction, leading to the pathogenesis of neurodegenerative diseases such as ALS. ALS is described as the loss of upper and lower motor neurons resulting in progressive muscle denervation and loss of voluntary movements. There are multiple shreds of evidence in the literature regarding the mechanism involved in mitochondrial dysfunction and possible therapeutic targets to treat the condition. Moreover, different studies reported the role of different gene mutations and malfunctions in transport system responsible for the accumulation and aggregation of the proteins inside the brain cells. This accumulation and/or aggregation of proteins in the neuronal cells is known as neuronal traffic jam, which also plays the leading role in the progressive neurodegenerative diseases. In this review, we have elucidated the critical insights into mitochondrial dysfunction and neuronal traffic jam; and its role in the initiation and progression of ALS. Moreover, the pharmacological targets and possible conducts to this scenario are also brought together.
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Madruga E, Maestro I, Martínez A. Mitophagy Modulation, a New Player in the Race against ALS. Int J Mol Sci 2021; 22:ijms22020740. [PMID: 33450997 PMCID: PMC7828440 DOI: 10.3390/ijms22020740] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/09/2021] [Accepted: 01/11/2021] [Indexed: 02/06/2023] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a lethal neurodegenerative disease that usually results in respiratory paralysis in an interval of 2 to 4 years. ALS shows a multifactorial pathogenesis with an unknown etiology, and currently lacks an effective treatment. The vast majority of patients exhibit protein aggregation and a dysfunctional mitochondrial accumulation in their motoneurons. As a result, autophagy and mitophagy modulators may be interesting drug candidates that mitigate key pathological hallmarks of the disease. This work reviews the most relevant evidence that correlate mitophagy defects and ALS, and discusses the possibility of considering mitophagy as an interesting target in the search for an effective treatment for ALS.
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Affiliation(s)
- Enrique Madruga
- Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.M.); (I.M.)
| | - Inés Maestro
- Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.M.); (I.M.)
| | - Ana Martínez
- Centro de Investigaciones Biológicas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.M.); (I.M.)
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, 28031 Madrid, Spain
- Correspondence: ; Tel.: +34-918373112
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11
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Ejma M, Madetko N, Brzecka A, Guranski K, Alster P, Misiuk-Hojło M, Somasundaram SG, Kirkland CE, Aliev G. The Links between Parkinson's Disease and Cancer. Biomedicines 2020; 8:biomedicines8100416. [PMID: 33066407 PMCID: PMC7602272 DOI: 10.3390/biomedicines8100416] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/08/2020] [Accepted: 10/12/2020] [Indexed: 12/12/2022] Open
Abstract
Epidemiologic studies indicate a decreased incidence of most cancer types in Parkinson’s disease (PD) patients. However, some neoplasms are associated with a higher risk of occurrence in PD patients. Both pathologies share some common biological pathways. Although the etiologies of PD and cancer are multifactorial, some factors associated with PD, such as α-synuclein aggregation; mutations of PINK1, PARKIN, and DJ-1; mitochondrial dysfunction; and oxidative stress can also be involved in cancer proliferation or cancer suppression. The main protein associated with PD, i.e., α-synuclein, can be involved in some types of neoplastic formations. On the other hand, however, its downregulation has been found in the other cancers. PINK1 can act as oncogenic or a tumor suppressor. PARKIN dysfunction may lead to some cancers’ growth, and its expression may be associated with some tumors’ suppression. DJ-1 mutation is involved in PD pathogenesis, but its increased expression was found in some neoplasms, such as melanoma or breast, lung, colorectal, uterine, hepatocellular, and nasopharyngeal cancers. Both mitochondrial dysfunction and oxidative stress are involved in PD and cancer development. The aim of this review is to summarize the possible associations between PD and carcinogenesis.
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Affiliation(s)
- Maria Ejma
- Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, Poland; (M.E.); (N.M.); (K.G.)
| | - Natalia Madetko
- Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, Poland; (M.E.); (N.M.); (K.G.)
| | - Anna Brzecka
- Department of Pulmonology and Lung Oncology, Wroclaw Medical University, Grabiszyńska 105, 53-439 Wroclaw, Poland;
| | - Konstanty Guranski
- Department of Neurology, Wroclaw Medical University, Borowska 213, 50-556 Wrocław, Poland; (M.E.); (N.M.); (K.G.)
| | - Piotr Alster
- Department of Neurology, Medical University of Warsaw, Kondratowicza 8, 03-242 Warszawa, Poland;
| | - Marta Misiuk-Hojło
- Department of Ophthalmology, Wroclaw Medical University, Borowska 213, 50-556 Wroclaw, Poland;
| | - Siva G. Somasundaram
- Department of Biological Sciences, Salem University, Salem, WV 26426, USA; (S.G.S.); (C.E.K.)
| | - Cecil E. Kirkland
- Department of Biological Sciences, Salem University, Salem, WV 26426, USA; (S.G.S.); (C.E.K.)
| | - Gjumrakch Aliev
- Sechenov First Moscow State Medical University (Sechenov University), St. Trubetskaya, 8, bld. 2, 119991 Moscow, Russia
- Research Institute of Human Morphology, Russian Academy of Medical Science, Street Tsyurupa 3, 117418 Moscow, Russia
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, Chernogolovka, 142432 Moscow Region, Russia
- GALLY International Research Institute, 7733 Louis Pasteur Drive, #330, San Antonio, TX 78229, USA
- Correspondence: or ; Tel.: +1-210-442-8625 or +1-440-263-7461
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12
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Wang X, Davis RL. Early Mitochondrial Fragmentation and Dysfunction in a Drosophila Model for Alzheimer's Disease. Mol Neurobiol 2020; 58:143-155. [PMID: 32909149 DOI: 10.1007/s12035-020-02107-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/27/2020] [Indexed: 12/24/2022]
Abstract
Many different cellular systems and molecular processes become compromised in Alzheimer's disease (AD) including proteostasis, autophagy, inflammatory responses, synapse and neuronal circuitry, and mitochondrial function. We focused in this study on mitochondrial dysfunction owing to the toxic neuronal environment produced by expression of Aβ42, and its relationship to other pathologies found in AD including increased neuronal apoptosis, plaque deposition, and memory impairment. Using super-resolution microscopy, we have assayed mitochondrial status in the three distinct neuronal compartments (somatic, dendritic, axonal) of mushroom body neurons of Drosophila expressing Aβ42. The mushroom body neurons comprise a major center for olfactory memory formation in insects. We employed calcium imaging to measure mitochondrial function, immunohistochemical and staining techniques to measure apoptosis and plaque formation, and olfactory classical conditioning to measure learning. We found that mitochondria become fragmented at a very early age along with decreased function measured by mitochondrial calcium entry. Increased apoptosis and plaque deposition also occur early, yet interestingly, a learning impairment was found only after a much longer period of time-10 days, which is a large fraction of the fly's lifespan. This is similar to the pronounced delay between cellular pathologies and the emergence of a memory dysfunction in humans. Our studies are consistent with the model that mitochondrial dysfunction and/or other cellular pathologies emerge at an early age and lead to much later learning impairments. The results obtained further develop this Drosophila model as a useful in vivo system for probing the mechanisms by which Aβ42 produces mitochondrial and other cellular toxicities that produce memory dysfunction.
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Affiliation(s)
- Xingjun Wang
- Department of Neuroscience, Scripps Research Institute Florida, Jupiter, Florida, 33458, USA
| | - Ronald L Davis
- Department of Neuroscience, Scripps Research Institute Florida, Jupiter, Florida, 33458, USA.
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Ravanidis S, Doxakis E. RNA-Binding Proteins Implicated in Mitochondrial Damage and Mitophagy. Front Cell Dev Biol 2020; 8:372. [PMID: 32582692 PMCID: PMC7287033 DOI: 10.3389/fcell.2020.00372] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/27/2020] [Indexed: 01/19/2023] Open
Abstract
The mitochondrial lifecycle comprises biogenesis, fusion and cristae remodeling, fission, and breakdown by the autophagosome. This cycle is essential for maintaining proper cellular function, and inhibition of any of these processes results in deterioration of bioenergetics and swift induction of apoptosis, particularly in energy-craving cells such as myocytes and neurons. Regulation of gene expression is a fundamental step in maintaining mitochondrial plasticity, mediated by (1) transcription factors that control the expression of mitochondrial mRNAs and (2) RNA-binding proteins (RBPs) that regulate mRNA splicing, stability, targeting to mitochondria, and translation. More recently, RBPs have been also shown to interact with proteins modulating the mitochondrial lifecycle. Importantly, misexpression or mutations in RBPs give rise to mitochondrial dysfunctions, and there is strong evidence to support that these mitochondrial impairments occur early in disease development, constituting leading causes of pathogenesis. This review presents key aspects of the molecular network of the disease-relevant RBPs, including transactive response DNA-binding protein 43 (TDP43), fused in sarcoma (FUS), T-cell intracellular antigen 1 (TIA1), TIA-related protein (TIAR), and pumilio (PUM) that drive mitochondrial dysfunction in the nervous system.
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Affiliation(s)
- Stylianos Ravanidis
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Epaminondas Doxakis
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
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Ryan VH, Fawzi NL. Physiological, Pathological, and Targetable Membraneless Organelles in Neurons. Trends Neurosci 2019; 42:693-708. [PMID: 31493925 PMCID: PMC6779520 DOI: 10.1016/j.tins.2019.08.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 07/03/2019] [Accepted: 08/05/2019] [Indexed: 12/20/2022]
Abstract
Neurons require unique subcellular compartmentalization to function efficiently. Formed from proteins and RNAs through liquid-liquid phase separation, membraneless organelles (MLOs) have emerged as one way in which cells form distinct, specialized compartments in the absence of lipid membranes. We first discuss MLOs that are common to many cell types as well as those that are specific to neurons. Interestingly, many proteins associated with neurodegenerative disease are found in MLOs, particularly in stress and transport granules. We next review possible links between neurodegeneration and MLOs, and the hypothesis that the protein and RNA inclusions formed in disease are related to the functional complexes occurring inside these MLOs. Finally, we discuss the hypothesis that protein post-translational modifications (PTMs), which can alter phase separation, can modulate MLO formation and provide potential new therapeutic strategies for currently untreatable neurodegenerative diseases.
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Affiliation(s)
- Veronica H Ryan
- Neuroscience Graduate Program, Brown University, Providence, RI 02912, USA
| | - Nicolas L Fawzi
- Department of Molecular Pharmacology, Physiology, and Biotechnology, Brown University, Providence, RI 02912, USA.
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