51
|
Ghatak S, Trudler D, Dolatabadi N, Ambasudhan R. Parkinson's disease: what the model systems have taught us so far. J Genet 2018; 97:729-751. [PMID: 30027906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Parkinson's disease (PD) is a debilitating neurodegenerative disorder, for which people above the age of 60 show an increased risk. Although there has been great advancement in understanding the disease-related abnormalities in brain circuitry and development of symptomatic treatments, a cure for PD remains elusive. The discovery of PD associated gene mutations and environmental toxins have yielded animal models of the disease. These models could recapitulate several key aspects of PD, and provide more insights into the disease pathogenesis. They have also revealed novel aspects of the disease mechanism including noncell autonomous events and spreading of pathogenic protein species across the brain. Nevertheless, none of these models so far can comprehensively represent all aspects of the human disease. While the field is still searching for the perfect model system, recent developments in stem cell biology have provided a new dimension to modelling PD, especially doing it in a patient-specific manner. In the current review, we attempt to summarize the key findings in the areas discussed above, and highlight how the core PD pathology distinguishes itself from other neurodegenerative disorders while also resembling them in many aspects.
Collapse
Affiliation(s)
- Swagata Ghatak
- Neurodegenerative Disease Center, Scintillon Institute, San Diego, CA 92121, USA.
| | | | | | | |
Collapse
|
52
|
Intracellular and Intercellular Signalling Mechanisms following DNA Damage Are Modulated By PINK1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:1391387. [PMID: 30116473 PMCID: PMC6079383 DOI: 10.1155/2018/1391387] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 05/04/2018] [Accepted: 05/20/2018] [Indexed: 02/06/2023]
Abstract
Impaired mitochondrial function and accumulation of DNA damage have been recognized as hallmarks of age-related diseases. Mitochondrial dysfunction initiates protective signalling mechanisms coordinated at nuclear level particularly by modulating transcription of stress signalling factors. In turn, cellular response to DNA lesions comprises a series of interconnected complex protective pathways, which require the energetic and metabolic support of the mitochondria. These are involved in intracellular as well as in extracellular signalling of damage. Here, we have initiated a study that addresses how mitochondria-nucleus communication may occur in conditions of combined mitochondrial dysfunction and genotoxic stress and what are the consequences of this interaction on the cell system. In this work, we used cells deficient for PINK1, a mitochondrial kinase involved in mitochondrial quality control whose loss of function leads to the accumulation of dysfunctional mitochondria, challenged with inducers of DNA damage, namely, ionizing radiation and the radiomimetic bleomycin. Combined stress at the level of mitochondria and the nucleus impairs both mitochondrial and nuclear functions. Our findings revealed exacerbated sensibility to genotoxic stress in PINK1-deficient cells. The same cells showed an impaired induction of bystander phenomena following stress insults. However, these cells responded adaptively when a challenge dose was applied subsequently to a low-dose treatment to the cells. The data demonstrates that PINK1 modulates intracellular and intercellular signalling pathways, particularly adaptive responses and transmission of bystander signalling, two facets of the cell-protective mechanisms against detrimental agents.
Collapse
|
53
|
Pozo Devoto VM, Falzone TL. Mitochondrial dynamics in Parkinson's disease: a role for α-synuclein? Dis Model Mech 2018; 10:1075-1087. [PMID: 28883016 PMCID: PMC5611962 DOI: 10.1242/dmm.026294] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 07/13/2017] [Indexed: 12/13/2022] Open
Abstract
The distinctive pathological hallmarks of Parkinson's disease are the progressive death of dopaminergic neurons and the intracellular accumulation of Lewy bodies enriched in α-synuclein protein. Several lines of evidence from the study of sporadic, familial and pharmacologically induced forms of human Parkinson's disease also suggest that mitochondrial dysfunction plays an important role in disease progression. Although many functions have been proposed for α-synuclein, emerging data from human and animal models of Parkinson's disease highlight a role for α-synuclein in the control of neuronal mitochondrial dynamics. Here, we review the α-synuclein structural, biophysical and biochemical properties that influence relevant mitochondrial dynamic processes such as fusion-fission, transport and clearance. Drawing on current evidence, we propose that α-synuclein contributes to the mitochondrial defects that are associated with the pathology of this common and progressive neurodegenerative disease. Summary: The authors review the α-synuclein structural, biophysical and biochemical properties that influence relevant mitochondrial physiological processes such as fusion-fission, transport and clearance, and propose that α-synuclein contributes to the mitochondrial defects that are associated with Parkinson's disease.
Collapse
Affiliation(s)
- Victorio M Pozo Devoto
- Instituto de Biología Celular y Neurociencias, IBCN (UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, Buenos Aires, CP1121, Argentina.,International Clinical Research Center (ICRC), St. Anne's University Hospital, CZ-65691, Brno, Czech Republic
| | - Tomas L Falzone
- Instituto de Biología Celular y Neurociencias, IBCN (UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires, Paraguay 2155, Buenos Aires, CP1121, Argentina .,Instituto de Biología y Medicina Experimental, IBYME-CONICET, Vuelta de Obligado 2490, Buenos Aires, CP1428, Argentina
| |
Collapse
|
54
|
Chu CT. Multiple pathways for mitophagy: A neurodegenerative conundrum for Parkinson's disease. Neurosci Lett 2018; 697:66-71. [PMID: 29626647 DOI: 10.1016/j.neulet.2018.04.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 03/15/2018] [Accepted: 04/02/2018] [Indexed: 01/05/2023]
Abstract
It has been nearly a decade since the first landmark studies implicating familial recessive Parkinson's disease genes in the regulation of selective mitochondrial autophagy. The PTEN-induced kinase 1 (PINK1) and the E3 ubiquitin ligase Parkin (encoded by the PARK2 gene) act together to mark depolarized mitochondria for degradation. There is now an extensive body of literature detailing key mediators and steps in this pathway, based mostly on work in transformed cell lines. However, the degree to which PINK1-triggered mitophagy contributes to mitochondrial quality control in the mammalian brain, and the extent to which its disruption contributes to Parkinson's disease pathogenesis remain uncertain. In recent years, it has become clear that there are multiple, potentially redundant, pathways of cargo specification for mitophagy. Important mitophagy-independent functions of PINK1 and Parkin are also emerging. This review summarizes key features of three major mitophagy cargo recognition systems: receptor-mediated, ubiquitin-mediated and cardiolipin-mediated. New animal models that may be useful for tracking the delivery of mitochondria into lysosomes in different neuronal populations will be highlighted. Combining these research tools with methods to selectively disrupt specific mitophagy pathways may lead to a better understanding of the potential role of mitophagy in modulating neuronal vulnerability in Parkinson's spectrum (PD/PDD/DLB) and other neurodegenerative diseases.
Collapse
Affiliation(s)
- Charleen T Chu
- Departments of Pathology and Ophthalmology, Pittsburgh Institute for Neurodegenerative Diseases, McGowan Institute for Regenerative Medicine and Center for Neuroscience at the University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA.
| |
Collapse
|
55
|
Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Thermodynamics in Neurodegenerative Diseases: Interplay Between Canonical WNT/Beta-Catenin Pathway-PPAR Gamma, Energy Metabolism and Circadian Rhythms. Neuromolecular Med 2018; 20:174-204. [PMID: 29572723 DOI: 10.1007/s12017-018-8486-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 03/20/2018] [Indexed: 02/06/2023]
Abstract
Entropy production rate is increased by several metabolic and thermodynamics abnormalities in neurodegenerative diseases (NDs). Irreversible processes are quantified by changes in the entropy production rate. This review is focused on the opposing interactions observed in NDs between the canonical WNT/beta-catenin pathway and PPAR gamma and their metabolic and thermodynamic implications. In amyotrophic lateral sclerosis and Huntington's disease, WNT/beta-catenin pathway is upregulated, whereas PPAR gamma is downregulated. In Alzheimer's disease and Parkinson's disease, WNT/beta-catenin pathway is downregulated while PPAR gamma is upregulated. The dysregulation of the canonical WNT/beta-catenin pathway is responsible for the modification of thermodynamics behaviors of metabolic enzymes. Upregulation of WNT/beta-catenin pathway leads to aerobic glycolysis, named Warburg effect, through activated enzymes, such as glucose transporter (Glut), pyruvate kinase M2 (PKM2), pyruvate dehydrogenase kinase 1(PDK1), monocarboxylate lactate transporter 1 (MCT-1), lactic dehydrogenase kinase-A (LDH-A) and inactivation of pyruvate dehydrogenase complex (PDH). Downregulation of WNT/beta-catenin pathway leads to oxidative stress and cell death through inactivation of Glut, PKM2, PDK1, MCT-1, LDH-A but activation of PDH. In addition, in NDs, PPAR gamma is dysregulated, whereas it contributes to the regulation of several key circadian genes. NDs show many dysregulation in the mediation of circadian clock genes and so of circadian rhythms. Thermodynamics rhythms operate far-from-equilibrium and partly regulate interactions between WNT/beta-catenin pathway and PPAR gamma. In NDs, metabolism, thermodynamics and circadian rhythms are tightly interrelated.
Collapse
Affiliation(s)
- Alexandre Vallée
- DRCI, Hôpital Foch, Suresnes, France.
- LMA (Laboratoire de Mathématiques et Applications) CNRS 7348, University of Poitiers, 11 Boulevard Marie et Pierre Curie, Poitiers, France.
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien, Meaux, France
| | - Rémy Guillevin
- DACTIM, UMR CNRS 7348, Université de Poitiers et CHU de Poitiers, Poitiers, France
| | - Jean-Noël Vallée
- DRCI, Hôpital Foch, Suresnes, France
- CHU Amiens Picardie, Université Picardie Jules Verne (UPJV), Amiens, France
| |
Collapse
|
56
|
Environmental and Genetic Variables Influencing Mitochondrial Health and Parkinson's Disease Penetrance. PARKINSONS DISEASE 2018; 2018:8684906. [PMID: 29707191 PMCID: PMC5863306 DOI: 10.1155/2018/8684906] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 12/07/2017] [Indexed: 12/21/2022]
Abstract
There is strong evidence that impairment of mitochondrial function plays a key role in the pathogenesis of PD. The two key PD genes related to mitochondrial function are Parkin (PARK2) and PINK1 (PARK6), and also mutations in several other PD genes, including SNCA, LRRK2, DJ1, CHCHD2, and POLG, have been shown to induce mitochondrial stress. Many mutations are clearly pathogenic in some patients while carriers of other mutations either do not develop the disease or show a delayed onset, a phenomenon known as reduced penetrance. Indeed, for several mutations in autosomal dominant PD genes, penetrance is markedly reduced, whereas heterozygous carriers of recessive mutations may predispose to PD in a dominant manner, although with highly reduced penetrance, if additional disease modifiers are present. The identification and validation of such modifiers leading to reduced penetrance or increased susceptibility in the case of heterozygous carriers of recessive mutations are relevant for a better understanding of mechanisms contributing to disease onset. We discuss genetic and environmental factors as well as mitochondrial DNA alterations and protein-protein interactions, all involved in mitochondrial function, as potential causes to modify penetrance of mutations in dominant PD genes and to determine manifestation of heterozygous mutations in recessive PD genes.
Collapse
|
57
|
Anzell AR, Maizy R, Przyklenk K, Sanderson TH. Mitochondrial Quality Control and Disease: Insights into Ischemia-Reperfusion Injury. Mol Neurobiol 2018; 55:2547-2564. [PMID: 28401475 PMCID: PMC5636654 DOI: 10.1007/s12035-017-0503-9] [Citation(s) in RCA: 250] [Impact Index Per Article: 41.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/20/2017] [Indexed: 12/28/2022]
Abstract
Mitochondria are key regulators of cell fate during disease. They control cell survival via the production of ATP that fuels cellular processes and, conversely, cell death via the induction of apoptosis through release of pro-apoptotic factors such as cytochrome C. Therefore, it is essential to have stringent quality control mechanisms to ensure a healthy mitochondrial network. Quality control mechanisms are largely regulated by mitochondrial dynamics and mitophagy. The processes of mitochondrial fission (division) and fusion allow for damaged mitochondria to be segregated and facilitate the equilibration of mitochondrial components such as DNA, proteins, and metabolites. The process of mitophagy are responsible for the degradation and recycling of damaged mitochondria. These mitochondrial quality control mechanisms have been well studied in chronic and acute pathologies such as Parkinson's disease, Alzheimer's disease, stroke, and acute myocardial infarction, but less is known about how these two processes interact and contribute to specific pathophysiologic states. To date, evidence for the role of mitochondrial quality control in acute and chronic disease is divergent and suggests that mitochondrial quality control processes can serve both survival and death functions depending on the disease state. This review aims to provide a synopsis of the molecular mechanisms involved in mitochondrial quality control, to summarize our current understanding of the complex role that mitochondrial quality control plays in the progression of acute vs chronic diseases and, finally, to speculate on the possibility that targeted manipulation of mitochondrial quality control mechanisms may be exploited for the rationale design of novel therapeutic interventions.
Collapse
Affiliation(s)
- Anthony R Anzell
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Rita Maizy
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Karin Przyklenk
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI, 48201, USA
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA
| | - Thomas H Sanderson
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI, 48201, USA.
| |
Collapse
|
58
|
Lack of PINK1 alters glia innate immune responses and enhances inflammation-induced, nitric oxide-mediated neuron death. Sci Rep 2018; 8:383. [PMID: 29321620 PMCID: PMC5762685 DOI: 10.1038/s41598-017-18786-w] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 12/15/2017] [Indexed: 12/20/2022] Open
Abstract
Neuroinflammation is involved in the pathogenesis of Parkinson’s disease (PD) and other neurodegenerative disorders. We show that lack of PINK1- a mitochondrial kinase linked to recessive familial PD – leads to glia type-specific abnormalities of innate immunity. PINK1 loss enhances LPS/IFN-γ stimulated pro-inflammatory phenotypes of mixed astrocytes/microglia (increased iNOS, nitric oxide and COX-2, reduced IL-10) and pure astrocytes (increased iNOS, nitric oxide, TNF-α and IL-1β), while attenuating expression of both pro-inflammatory (TNF-α, IL-1β) and anti-inflammatory (IL-10) cytokines in microglia. These abnormalities are associated with increased inflammation-induced NF-κB signaling in astrocytes, and cause enhanced death of neurons co-cultured with inflamed PINK1−/− mixed glia and neuroblastoma cells exposed to conditioned medium from LPS/IFN-γ treated PINK1−/− mixed glia. Neuroblastoma cell death is prevented with an iNOS inhibitor, implicating increased nitric oxide production as the cause for enhanced death. Finally, we show for the first time that lack of a recessive PD gene (PINK1) increases α-Synuclein-induced nitric oxide production in all glia types (mixed glia, astrocytes and microglia). Our results describe a novel pathogenic mechanism in recessive PD, where PINK1 deficiency may increase neuron death via exacerbation of inflammatory stimuli-induced nitric oxide production and abnormal innate immune responses in glia cells.
Collapse
|
59
|
Mitochondrial calcium imbalance in Parkinson’s disease. Neurosci Lett 2018; 663:86-90. [DOI: 10.1016/j.neulet.2017.08.044] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/11/2017] [Accepted: 08/16/2017] [Indexed: 12/22/2022]
|
60
|
Díaz-Casado ME, Rusanova I, Aranda P, Fernández-Ortiz M, Sayed RKA, Fernández-Gil BI, Hidalgo-Gutiérrez A, Escames G, López LC, Acuña-Castroviejo D. In Vivo Determination of Mitochondrial Respiration in 1-Methyl-4-Phenyl-1,2,3,6-Tetrahydropyridine-Treated Zebrafish Reveals the Efficacy of Melatonin in Restoring Mitochondrial Normalcy. Zebrafish 2017; 15:15-26. [PMID: 29185873 DOI: 10.1089/zeb.2017.1479] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Although mitochondria dysfunction is related to multiple diseases, no in vivo studies are available on mitochondrial respiration in animal parkinsonian models. Our aim is to analyze in vivo mitochondrial respiration, which reflects changes in mitochondrial bioenergetics more precisely than in vitro mitochondrial preparations. These experiments can be carried out in zebrafish embryos, which were treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) from 24 to 72 hours postfertilization (hpf). A reduction in electron transfer system capacity, ATP turnover, and increased proton leak were observed at 72 hpf in MPTP-treated embryos. These changes were followed by a significant oxidative stress due to inhibition in antioxidative defense and autophagy impairment. After removing MPTP from the treatment at 72 hpf, these bioenergetic deficiencies persisted up to 120 hpf. The administration of melatonin to zebrafish embryos at 72 hpf, when mitochondrial dysfunction is already present, restored the respiratory capacity and ATP production, reduced oxidative stress, and normalized autophagy after 48 h. Melatonin also counteracted mortality and embryonic malformations due to MPTP. Our results confirm for the first time the efficacy of melatonin in restoring parkinsonian phenotypes in animals.
Collapse
Affiliation(s)
- María E Díaz-Casado
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Iryna Rusanova
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Paula Aranda
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Marisol Fernández-Ortiz
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Ramy K A Sayed
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,3 Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University , Sohag, Egypt
| | - Beatriz I Fernández-Gil
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Agustín Hidalgo-Gutiérrez
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Germaine Escames
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Luis C López
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain
| | - Darío Acuña-Castroviejo
- 1 Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada , Granada, Spain .,2 Departamento de Fisiología, Facultad de Medicina, Universidad de Granada , Granada, Spain .,4 Unidad de Gestión Clínica de Laboratorios Clínicos, CIBER de Fragilidad y Envejecimiento, Ibs.Granada, Complejo Hospitalario de Granada , Granada, Spain
| |
Collapse
|
61
|
Helley MP, Pinnell J, Sportelli C, Tieu K. Mitochondria: A Common Target for Genetic Mutations and Environmental Toxicants in Parkinson's Disease. Front Genet 2017; 8:177. [PMID: 29204154 PMCID: PMC5698285 DOI: 10.3389/fgene.2017.00177] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 11/01/2017] [Indexed: 12/15/2022] Open
Abstract
Parkinson's disease (PD) is a devastating neurological movement disorder. Since its first discovery 200 years ago, genetic and environmental factors have been identified to play a role in PD development and progression. Although genetic studies have been the predominant driving force in PD research over the last few decades, currently only a small fraction of PD cases can be directly linked to monogenic mutations. The remaining cases have been attributed to other risk associated genes, environmental exposures and gene-environment interactions, making PD a multifactorial disorder with a complex etiology. However, enormous efforts from global research have yielded significant insights into pathogenic mechanisms and potential therapeutic targets for PD. This review will highlight mitochondrial dysfunction as a common pathway involved in both genetic mutations and environmental toxicants linked to PD.
Collapse
Affiliation(s)
- Martin P. Helley
- Department of Environmental Health Sciences, Florida International University, Miami, FL, United States
| | - Jennifer Pinnell
- Department of Environmental Health Sciences, Florida International University, Miami, FL, United States
- Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth, United Kingdom
| | - Carolina Sportelli
- Department of Environmental Health Sciences, Florida International University, Miami, FL, United States
- Peninsula Schools of Medicine and Dentistry, Plymouth University, Plymouth, United Kingdom
| | - Kim Tieu
- Department of Environmental Health Sciences, Florida International University, Miami, FL, United States
| |
Collapse
|
62
|
Onphachanh X, Lee HJ, Lim JR, Jung YH, Kim JS, Chae CW, Lee SJ, Gabr AA, Han HJ. Enhancement of high glucose-induced PINK1 expression by melatonin stimulates neuronal cell survival: Involvement of MT 2 /Akt/NF-κB pathway. J Pineal Res 2017; 63. [PMID: 28580603 DOI: 10.1111/jpi.12427] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/31/2017] [Indexed: 12/11/2022]
Abstract
Hyperglycemia is a representative hallmark and risk factor for diabetes mellitus (DM) and is closely linked to DM-associated neuronal cell death. Previous investigators reported on a genome-wide association study and showed relationships between DM and melatonin receptor (MT), highlighting the role of MT signaling by assessing melatonin in DM. However, the role of MT signaling in DM pathogenesis is unclear. Therefore, we investigated the role of mitophagy regulators in high glucose-induced neuronal cell death and the effect of melatonin against high glucose-induced mitophagy regulators in neuronal cells. In our results, high glucose significantly increased PTEN-induced putative kinase 1 (PINK1) and LC-3B expressions; as well it decreased cytochrome c oxidase subunit 4 expression and Mitotracker™ fluorescence intensity. Silencing of PINK1 induced mitochondrial reactive oxygen species (ROS) accumulation and mitochondrial membrane potential impairment, increased expressions of cleaved caspases, and increased the number of annexin V-positive cells. In addition, high glucose-stimulated melatonin receptor 1B (MTNR1B) mRNA and PINK1 expressions were reversed by ROS scavenger N-acetyl cysteine pretreatment. Upregulation of PINK1 expression in neuronal cells is suppressed by pretreatment with MT2 receptor-specific inhibitor 4-P-PDOT. We further showed melatonin stimulated Akt phosphorylation, which was followed by nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) phosphorylation and nuclear translocation. Silencing of PINK1 expression abolished melatonin-regulated mitochondrial ROS production, cleaved caspase-3 and caspase-9 expressions, and the number of annexin V-positive cells. In conclusion, we have demonstrated the melatonin stimulates PINK1 expression via an MT2 /Akt/NF-κB pathway, and such stimulation is important for the prevention of neuronal cell apoptosis under high glucose conditions.
Collapse
Affiliation(s)
- Xaykham Onphachanh
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- Animal Science Department, Faculty of Agriculture and Forest Resource, Souphanouvong University, Luang Prabang, Lao PDR
| | - Hyun Jik Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| | - Jae Ryong Lim
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| | - Young Hyun Jung
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| | - Jun Sung Kim
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| | - Chang Woo Chae
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| | - Sei-Jung Lee
- Department of Pharmaceutical Engineering, Daegu Haany University, Gyeongsan, South Korea
| | - Amr Ahmed Gabr
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- Department of Physiology, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - Ho Jae Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, Seoul National University, Seoul, Korea
- BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul, Korea
| |
Collapse
|
63
|
Patel M, McElroy PB. Mitochondrial Dysfunction in Parkinson’s Disease. OXIDATIVE STRESS AND REDOX SIGNALLING IN PARKINSON’S DISEASE 2017. [DOI: 10.1039/9781782622888-00061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Parkinson’s disease (PD) is one of the most common neurodegenerative disorders where oxidative stress and mitochondrial dysfunction have been implicated as etiological factors. Mitochondria are the major producers of reactive oxygen species (ROS) that can have damaging effects to cellular macromolecules leading to neurodegeneration. The most compelling evidence for the role of mitochondria in the pathogenesis of PD has been derived from toxicant-induced models of parkinsonism. Over the years, epidemiological studies have suggested a link between exposure to environmental toxins such as pesticides and the risk of developing PD. Data from human and experimental studies involving the use of chemical agents like paraquat, diquat, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine, rotenone and maneb have provided valuable insight into the underlying mitochondrial mechanisms contributing to PD and associated neurodegeneration. In this review, we have discussed the role of mitochondrial ROS and dysfunction in the pathogenesis of PD with a special focus on environmental agent-induced parkinsonism. We have described the various mitochondrial mechanisms by which such chemicals exert neurotoxicity, highlighting some landmark epidemiological and experimental studies that support the role of mitochondrial ROS and oxidative stress in contributing to these effects. Finally, we have discussed the significance of these studies in understanding the mechanistic underpinnings of PD-related dopaminergic neurodegeneration.
Collapse
Affiliation(s)
- Manisha Patel
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
| | - Pallavi Bhuyan McElroy
- Department of Pharmaceutical Sciences, University of Colorado Anschutz Medical Campus Aurora CO 80045 USA
| |
Collapse
|
64
|
Zhang Y, Nguyen DT, Olzomer EM, Poon GP, Cole NJ, Puvanendran A, Phillips BR, Hesselson D. Rescue of Pink1 Deficiency by Stress-Dependent Activation of Autophagy. Cell Chem Biol 2017; 24:471-480.e4. [PMID: 28366621 DOI: 10.1016/j.chembiol.2017.03.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 01/02/2017] [Accepted: 03/02/2017] [Indexed: 10/19/2022]
Abstract
Stimulating autophagy is a promising therapeutic strategy for slowing the progression of neurodegenerative disease. Neurons are insensitive to current approaches based on mTOR inhibition for activating autophagy, and instead may rely on the Parkinson's disease-associated proteins PINK1 and PARKIN to activate the autophagy-lysosomal pathway in response to mitochondrial damage. We developed a multifactorial zebrafish drug-screening platform combining Pink1 deficiency with an environmental toxin to compromise mitochondrial function and trigger dopaminergic neuron loss. Using a phenotypic screening strategy, we identified a series of piperazine phenothiazines, including trifluoperazine, which rescued Pink1 deficiency by activating autophagy selectively in stressed zebrafish and human cells. We show that trifluoperazine acts downstream of, or parallel to, PINK1/PARKIN to stimulate transcription factor EB nuclear translocation and the expression of autophagy-lysosomal target genes. These data suggest that stress-dependent pharmacological reactivation of autophagy could prevent the loss of vulnerable neurons to slow neurodegeneration.
Collapse
Affiliation(s)
- Yuxi Zhang
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - David T Nguyen
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Ellen M Olzomer
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Gin P Poon
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Nicholas J Cole
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Anita Puvanendran
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Brigitte R Phillips
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia
| | - Daniel Hesselson
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, NSW 2010, Australia; St. Vincent's Clinical School, UNSW Australia, Sydney, NSW 2010, Australia.
| |
Collapse
|
65
|
Zhang R, Gu J, Chen J, Ni J, Hung J, Wang Z, Zhang X, Feng J, Ji L. High expression of PINK1 promotes proliferation and chemoresistance of NSCLC. Oncol Rep 2017; 37:2137-2146. [PMID: 28259921 DOI: 10.3892/or.2017.5486] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 01/02/2017] [Indexed: 11/06/2022] Open
Abstract
PTEN-induced putative kinase 1 (PINK1) was identified initially as a gene upregulated in cancer cells which regulates cellular processes of significance in cancer cell biology, including cell survival, stress resistance and the cell cycle. However, the expression and function of PINK1 in non-small cell lung cancer (NSCLC) has not been determined yet. We demonstrated high PINK1 expression in NSCLC tumor tissues and cell lines as assessed by western blot and immunohistochemistry (IHC) assays. In addition, IHC analysis revealed that PINK1 expression was associated with a more invasive tumor phenotype and poor prognosis. Furthermore, in vitro studies using upregulation and knockdown of PINK1 confirmed that PINK1 promoted cell proliferation of NSCLC, which might be through as the NF-κB pathway. Moreover, we also demonstrated that downregulation of PINK1 enhanced cisplatin (CDDP)-induced NSCLC cell apoptosis. Together, our findings indicate that PINK1 plays a significant role in NSCLC progression and chemoresistance, and highlights its potential role as a target in future anticancer therapies.
Collapse
Affiliation(s)
- Rui Zhang
- Department of Respiratory Disease, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Jun Gu
- Department of Respiratory Disease, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Jie Chen
- Department of Oncology, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Jun Ni
- Department of Rehabilitation, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226200, P.R. China
| | - Jieru Hung
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Zhiwen Wang
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Xiaochen Zhang
- Department of Intensive Care Unit, Qidong People's Hospital, Nantong, Jiangsu 226200, P.R. China
| | - Jian Feng
- Department of Respiratory Disease, Affiliated Hospital of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Lili Ji
- Department of Pathology, Medical College of Nantong University, Nantong, Jiangsu 226001, P.R. China
| |
Collapse
|
66
|
Li Y, Qiu L, Liu X, Hou Z, Yu B. PINK1 alleviates myocardial hypoxia-reoxygenation injury by ameliorating mitochondrial dysfunction. Biochem Biophys Res Commun 2017; 484:118-124. [DOI: 10.1016/j.bbrc.2017.01.061] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 01/13/2017] [Indexed: 10/20/2022]
|
67
|
Arun S, Liu L, Donmez G. Mitochondrial Biology and Neurological Diseases. Curr Neuropharmacol 2016; 14:143-54. [PMID: 26903445 PMCID: PMC4825945 DOI: 10.2174/1570159x13666150703154541] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 01/20/2015] [Accepted: 07/02/2015] [Indexed: 01/02/2023] Open
Abstract
Mitochondria are extremely active organelles that perform a variety of roles in the cell including energy production, regulation of calcium homeostasis, apoptosis, and population maintenance through fission and fusion. Mitochondrial dysfunction in the form of oxidative stress and mutations can contribute to the pathogenesis of various neurodegenerative diseases such as Parkinson’s (PD), Alzheimer’s (AD), and Huntington’s diseases (HD). Abnormalities of Complex I function in the electron transport chain have been implicated in some neurodegenerative diseases, inhibiting ATP production and generating reactive oxygen species that can cause major damage to mitochondria Mutations in both nuclear and mitochondrial DNA can contribute to neurodegenerative disease, although the pathogenesis of these conditions tends to focus on nuclear mutations. In PD, nuclear genome mutations in the PINK1 and parkin genes have been implicated in neurodegeneration [1], while mutations in APP, PSEN1 and PSEN2 have been implicated in a variety of clinical symptoms of AD [5]. Mutant htt protein is known to cause HD [2]. Much progress has been made to determine some causes of these neurodegenerative diseases, though permanent treatments have yet to be developed. In this review, we discuss the roles of mitochondrial dysfunction in the pathogenesis of these diseases.
Collapse
Affiliation(s)
| | | | - Gizem Donmez
- Department of Neuroscience, Tufts University School of Medicine, 136 Harrison Ave. Boston MA, 02111, USA.
| |
Collapse
|
68
|
Requejo-Aguilar R, Bolaños JP. Mitochondrial control of cell bioenergetics in Parkinson's disease. Free Radic Biol Med 2016; 100:123-137. [PMID: 27091692 PMCID: PMC5065935 DOI: 10.1016/j.freeradbiomed.2016.04.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 04/13/2016] [Accepted: 04/14/2016] [Indexed: 12/15/2022]
Abstract
Parkinson disease (PD) is a neurodegenerative disorder characterized by a selective loss of dopaminergic neurons in the substantia nigra. The earliest biochemical signs of the disease involve failure in mitochondrial-endoplasmic reticulum cross talk and lysosomal function, mitochondrial electron chain impairment, mitochondrial dynamics alterations, and calcium and iron homeostasis abnormalities. These changes are associated with increased mitochondrial reactive oxygen species (mROS) and energy deficiency. Recently, it has been reported that, as an attempt to compensate for the mitochondrial dysfunction, neurons invoke glycolysis as a low-efficient mode of energy production in models of PD. Here, we review how mitochondria orchestrate the maintenance of cellular energetic status in PD, with special focus on the switch from oxidative phosphorylation to glycolysis, as well as the implication of endoplasmic reticulum and lysosomes in the control of bioenergetics.
Collapse
Affiliation(s)
- Raquel Requejo-Aguilar
- Department of Biochemistry and Molecular Biology, University of Cordoba, Institute Maimonides of Biomedical Investigation of Cordoba (IMIBIC), Cordoba, Spain
| | - Juan P Bolaños
- Institute of Functional Biology and Genomics (IBFG), University of Salamanca-CSIC, Zacarias Gonzalez, 2, 37007 Salamanca, Spain.
| |
Collapse
|
69
|
Rüb C, Wilkening A, Voos W. Mitochondrial quality control by the Pink1/Parkin system. Cell Tissue Res 2016; 367:111-123. [PMID: 27586587 DOI: 10.1007/s00441-016-2485-8] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 08/05/2016] [Indexed: 02/08/2023]
Abstract
Mitochondrial dysfunction represents a prominent pathological feature in many neurodegenerative diseases, particularly in Parkinson's disease (PD). Mutations in the genes encoding the proteins Pink1 and Parkin have been identified as genetic risk factors in familiar cases of PD. Research during the last decade has identified both proteins as crucial components of an organellar quality control system that contributes to the maintenance of mitochondrial function in healthy cells. The Pink1/Parkin system acts as a sensor for mitochondrial quality and is activated, in particular, after the loss of the electric potential across the inner mitochondrial membrane. Pink1 molecules accumulate at the surface of damaged mitochondria to recruit and activate Parkin, which, in turn, elicits a signaling pathway eventually leading to the autophagic removal of the damaged organelles. This review summarizes recent advances in our knowledge of the functional role of the Pink1/Parkin system in preventing the accumulation of damaged mitochondria by mitophagy.
Collapse
Affiliation(s)
- Cornelia Rüb
- Institut für Biochemie und Molekularbiologie (IBMB), Universität Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Anne Wilkening
- Institut für Biochemie und Molekularbiologie (IBMB), Universität Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Wolfgang Voos
- Institut für Biochemie und Molekularbiologie (IBMB), Universität Bonn, Nussallee 11, 53115, Bonn, Germany.
| |
Collapse
|
70
|
Myocardial redox status, mitophagy and cardioprotection: a potential way to amend diabetic heart? Clin Sci (Lond) 2016; 130:1511-21. [PMID: 27433024 DOI: 10.1042/cs20160168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 05/18/2016] [Indexed: 12/25/2022]
Abstract
Diabetic cardiomyopathy (DCM) is one of the major cardiovascular complications in diabetes that increase the mortality of diabetic patients. Mechanisms underlying DCM have not been fully elucidated, hindering targeted design of effective strategies to delay or treat DCM. Mitochondrial dysfunction is recognized as the driving force for the pathogenesis of DCM; therefore, maintaining cardiac mitochondrial quality is crucial for DCM prevention. Mitophagy is the process by which cells degrade abnormal or superfluous mitochondria in order to correct mitochondrial dysfunction, improve mitochondrial quality and maintain cardiac homoeostasis. Although the roles of mitophagy in various cardiomyopathies have been suggested, it remains largely unknown how the process is regulated and whether it is altered in the diabetic heart. In this review, we summarize currently available studies that investigate mitophagy in the heart, including its pathways, features and protective roles in several situations, including DCM. Due to limited data about mitophagy in diabetic hearts, future studies are required to gain a deeper understanding of the regulatory mechanisms of mitophagy in the heart and to develop mitophagy-based strategies for protecting the heart from diabetic injury.
Collapse
|
71
|
Parkinson's Disease: The Mitochondria-Iron Link. PARKINSONS DISEASE 2016; 2016:7049108. [PMID: 27293957 PMCID: PMC4886095 DOI: 10.1155/2016/7049108] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/12/2016] [Accepted: 04/13/2016] [Indexed: 12/14/2022]
Abstract
Mitochondrial dysfunction, iron accumulation, and oxidative damage are conditions often found in damaged brain areas of Parkinson's disease. We propose that a causal link exists between these three events. Mitochondrial dysfunction results not only in increased reactive oxygen species production but also in decreased iron-sulfur cluster synthesis and unorthodox activation of Iron Regulatory Protein 1 (IRP1), a key regulator of cell iron homeostasis. In turn, IRP1 activation results in iron accumulation and hydroxyl radical-mediated damage. These three occurrences-mitochondrial dysfunction, iron accumulation, and oxidative damage-generate a positive feedback loop of increased iron accumulation and oxidative stress. Here, we review the evidence that points to a link between mitochondrial dysfunction and iron accumulation as early events in the development of sporadic and genetic cases of Parkinson's disease. Finally, an attempt is done to contextualize the possible relationship between mitochondria dysfunction and iron dyshomeostasis. Based on published evidence, we propose that iron chelation-by decreasing iron-associated oxidative damage and by inducing cell survival and cell-rescue pathways-is a viable therapy for retarding this cycle.
Collapse
|
72
|
Todorovic M, Wood SA, Mellick GD. Nrf2: a modulator of Parkinson’s disease? J Neural Transm (Vienna) 2016; 123:611-9. [DOI: 10.1007/s00702-016-1563-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 04/27/2016] [Indexed: 01/23/2023]
|
73
|
Curcumin Rescues a PINK1 Knock Down SH-SY5Y Cellular Model of Parkinson's Disease from Mitochondrial Dysfunction and Cell Death. Mol Neurobiol 2016; 54:2752-2762. [PMID: 27003823 DOI: 10.1007/s12035-016-9843-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/09/2016] [Indexed: 12/12/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder characterised by the loss of dopaminergic neurons in the substantia nigra. Mutations in the PINK1 gene result in an autosomal recessive form of early-onset PD. PINK1 plays a vital role in mitochondrial quality control via the removal of dysfunctional mitochondria. The aim of the present study was to create a cellular model of PD using siRNA-mediated knock down of PINK1 in SH-SY5Y neuroblastoma cells The possible protective effects of curcumin, known for its many beneficial properties including antioxidant and anti-inflammatory effects, was tested on this model in the presence and absence of paraquat, an additional stressor. PINK1 siRNA and control cells were separated into four treatment groups: (i) untreated, (ii) treated with paraquat, (iii) pre-treated with curcumin then treated with paraquat, or (iv) treated with curcumin. Various parameters of cellular and mitochondrial function were then measured. The PINK1 siRNA cells exhibited significantly decreased cell viability, mitochondrial membrane potential (MMP), mitochondrial respiration and ATP production, and increased apoptosis. Paraquat-treated cells exhibited decreased cell viability, increased apoptosis, a more fragmented mitochondrial network and decreased MMP. Curcumin pre-treatment followed by paraquat exposure rescued cell viability and increased MMP and mitochondrial respiration in control cells, and significantly decreased apoptosis and increased MMP and maximal respiration in PINK1 siRNA cells. These results highlight a protective effect of curcumin against mitochondrial dysfunction and apoptosis in PINK1-deficient and paraquat-exposed cells. More studies are warranted to further elucidate the potential neuroprotective properties of curcumin.
Collapse
|
74
|
PKA Phosphorylation of NCLX Reverses Mitochondrial Calcium Overload and Depolarization, Promoting Survival of PINK1-Deficient Dopaminergic Neurons. Cell Rep 2015; 13:376-86. [PMID: 26440884 PMCID: PMC4709126 DOI: 10.1016/j.celrep.2015.08.079] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 08/02/2015] [Accepted: 08/28/2015] [Indexed: 11/23/2022] Open
Abstract
Mitochondrial Ca(2+) overload is a critical, preceding event in neuronal damage encountered during neurodegenerative and ischemic insults. We found that loss of PTEN-induced putative kinase 1 (PINK1) function, implicated in Parkinson disease, inhibits the mitochondrial Na(+)/Ca(2+) exchanger (NCLX), leading to impaired mitochondrial Ca(2+) extrusion. NCLX activity was, however, fully rescued by activation of the protein kinase A (PKA) pathway. We further show that PKA rescues NCLX activity by phosphorylating serine 258, a putative regulatory NCLX site. Remarkably, a constitutively active phosphomimetic mutant of NCLX (NCLX(S258D)) prevents mitochondrial Ca(2+) overload and mitochondrial depolarization in PINK1 knockout neurons, thereby enhancing neuronal survival. Our results identify an mitochondrial Ca(2+) transport regulatory pathway that protects against mitochondrial Ca(2+) overload. Because mitochondrial Ca(2+) dyshomeostasis is a prominent feature of multiple disorders, the link between NCLX and PKA may offer a therapeutic target.
Collapse
|
75
|
Li X, Gehring K. Structural studies of parkin and sacsin: Mitochondrial dynamics in neurodegenerative diseases. Mov Disord 2015; 30:1610-9. [PMID: 26359782 DOI: 10.1002/mds.26357] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 07/08/2015] [Accepted: 07/09/2015] [Indexed: 12/21/2022] Open
Abstract
Neurodegenerative diseases are prevalent, chronic diseases emanating from the dysfunction or death of neurons. The disrupted mitochondrial dynamics observed in a large number of neurodegenerative diseases suggests a common etiology with the possibility of therapies targeting multiple diseases. This review highlights the contributions of structural studies of disease-related proteins to the understanding of neurodegenerative disease pathogenesis and especially the cellular events leading to disruptions in mitochondrial dynamics and function. The examples used are parkin and sacsin, two proteins linked respectively to autosomal-recessive early-onset PD and autosomal-recessive spastic ataxia of Charlevoix-Saguenay. Structural studies of parkin and sacsin explain the pathogenicity of a large number of disease-associated mutations and reveal insights into their cellular functions related to mitochondrial dynamics.
Collapse
Affiliation(s)
- Xinlu Li
- Department of Biochemistry and Groupe de recherche axé sur la structure des protéines, McGill University, Montréal, Québec, Canada
| | - Kalle Gehring
- Department of Biochemistry and Groupe de recherche axé sur la structure des protéines, McGill University, Montréal, Québec, Canada
| |
Collapse
|
76
|
Gómez-Sánchez R, Yakhine-Diop SMS, Bravo-San Pedro JM, Pizarro-Estrella E, Rodríguez-Arribas M, Climent V, Martin-Cano FE, González-Soltero ME, Tandon A, Fuentes JM, González-Polo RA. PINK1 deficiency enhances autophagy and mitophagy induction. Mol Cell Oncol 2015; 3:e1046579. [PMID: 27308585 DOI: 10.1080/23723556.2015.1046579] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 04/23/2015] [Accepted: 04/23/2015] [Indexed: 01/10/2023]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder with poorly understood etiology. Increasing evidence suggests that age-dependent compromise of the maintenance of mitochondrial function is a key risk factor. Several proteins encoded by PD-related genes are associated with mitochondria including PTEN-induced putative kinase 1 (PINK1), which was first identified as a gene that is upregulated by PTEN. Loss-of-function PINK1 mutations induce mitochondrial dysfunction and, ultimately, neuronal cell death. To mitigate the negative effects of altered cellular functions cells possess a degradation mechanism called autophagy for recycling damaged components; selective elimination of dysfunctional mitochondria by autophagy is termed mitophagy. Our study indicates that autophagy and mitophagy are upregulated in PINK1-deficient cells, and is the first report to demonstrate efficient fluxes by one-step analysis. We propose that autophagy is induced to maintain cellular homeostasis under conditions of non-regulated mitochondrial quality control.
Collapse
Affiliation(s)
- Rubén Gómez-Sánchez
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional ; Cáceres, Spain
| | - Sokhna M S Yakhine-Diop
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional ; Cáceres, Spain
| | - José M Bravo-San Pedro
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional; Cáceres, Spain; Equipe 11 Labellisee pas la Ligue Nationale Contre le Cancer; Center de Recherche des Cordeliers; Paris, France; Sorbonne Paris Cite; Paris, France; Gustave Roussy Cancer Campus; Villejuif, France; Metabolomics and Cell Biology Platforms; Gustave Roussy Cancer Campus; Villejuif, France
| | - Elisa Pizarro-Estrella
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional ; Cáceres, Spain
| | - Mario Rodríguez-Arribas
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional ; Cáceres, Spain
| | - Vicente Climent
- Departamento de Anatomía y Embriología Humana; Facultad de Medicina; Universidad de Extremadura ; Badajoz, Spain
| | - Francisco E Martin-Cano
- Departamento de Fisiología; Facultad de Enfermería y Terapia Ocupacional; Universidad de Extremadura ; Cáceres, Spain
| | | | - Anurag Tandon
- Tanz Center for Research in Neurodegenerative Diseases; University of Toronto ; Toronto, ON Canada
| | - José M Fuentes
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional; Cáceres, Spain; These authors contributed equally to this work
| | - Rosa A González-Polo
- Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas; Departamento de Bioquímica y Biología Molecular y Genética; Universidad de Extremadura; Facultad de Enfermería y Terapia Ocupacional; Cáceres, Spain; These authors contributed equally to this work
| |
Collapse
|
77
|
Abstract
The last 2 decades represent a period of unparalleled advancement in the understanding of the pathogenesis of Parkinson disease (PD). The discovery of several forms of familial parkinsonism with mendelian inheritance has elucidated insights into the mechanisms underlying the degeneration of dopaminergic neurons of the substantia nigra that histologically characterize PD. α-Synuclein, the principal component of Lewy bodies, remains the presumed pathogen at the heart of the current model; however, concurrently, a diverse range of other mechanisms have been implicated. The creation of a coherent disease model will be crucial to the development of effective disease modifying therapies for sporadic PD.
Collapse
Affiliation(s)
- Stephen Mullin
- Department of Clinical Neurosciences, UCL Institute of Neurology, Rowland Hill Street, Hampstead, London NW3 2PF, UK
| | - Anthony H V Schapira
- Department of Clinical Neurosciences, UCL Institute of Neurology, Rowland Hill Street, Hampstead, London NW3 2PF, UK.
| |
Collapse
|
78
|
Blesa J, Trigo-Damas I, Quiroga-Varela A, Jackson-Lewis VR. Oxidative stress and Parkinson's disease. Front Neuroanat 2015. [PMID: 26217195 PMCID: PMC4495335 DOI: 10.3389/fnana.2015.00091] [Citation(s) in RCA: 523] [Impact Index Per Article: 58.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Parkinson disease (PD) is a chronic, progressive neurological disease that is associated with a loss of dopaminergic neurons in the substantia nigra pars compacta of the brain. The molecular mechanisms underlying the loss of these neurons still remain elusive. Oxidative stress is thought to play an important role in dopaminergic neurotoxicity. Complex I deficiencies of the respiratory chain account for the majority of unfavorable neuronal degeneration in PD. Environmental factors, such as neurotoxins, pesticides, insecticides, dopamine (DA) itself, and genetic mutations in PD-associated proteins contribute to mitochondrial dysfunction which precedes reactive oxygen species formation. In this mini review, we give an update of the classical pathways involving these mechanisms of neurodegeneration, the biochemical and molecular events that mediate or regulate DA neuronal vulnerability, and the role of PD-related gene products in modulating cellular responses to oxidative stress in the course of the neurodegenerative process.
Collapse
Affiliation(s)
- Javier Blesa
- Centro Integral de Neurociencias A.C., HM Puerta del Sur, Hospitales de Madrid, Móstoles and Medical School, CEU San Pablo University, Madrid Spain
| | - Ines Trigo-Damas
- Centro Integral de Neurociencias A.C., HM Puerta del Sur, Hospitales de Madrid, Móstoles and Medical School, CEU San Pablo University, Madrid Spain
| | - Anna Quiroga-Varela
- Department of Medicine, Clinica Neurologica, Ospedale Santa Maria della Misericordia - Università di Perugia, Perugia Italy
| | | |
Collapse
|
79
|
Abstract
BACKGROUND Parkinson's disease (PD) was previously described as the prototypical sporadic disease; however, rapid advances in population and molecular genetics have revealed the existence of a significant number genetic risk factors, prompting its redefinition as a primarily genetic disorder. SOURCES OF DATA Data for this review have been gathered from the published literature. AREAS OF AGREEMENT Multiple haplotypes conveying variable but quantifiable genetic risk, acting concurrently and possibly interacting with one another, provide the basis for a new model of PD. The beginning of this revolution in our understanding came from the clinical observation of parkinsonism with a Mendelian pattern of inheritance in a number of families. The functional work that followed elucidated multiple disease pathways leading to the degeneration of the substantia nigra that characterizes PD. It is however only in recent years, with the emergence of large cohort genome-wide association studies (GWAS), that the relevance of these pathways to so-called sporadic PD has become apparent. AREAS OF CONTROVERSY A substantial portion of the presumed genetic inheritance of PD remains at present undefined. Although it is likely that so-called intermediate risk genetic risk factors are the principal component of this 'missing heritability', this is yet to be proved. GROWING POINTS Although the picture is by now means complete, the beginnings of rational basis for genetic screening of PD risk have begun to emerge. Equally, this enhanced understanding of the various genetic and in turn biochemical pathways shows promising signs of producing fruitful therapeutic strategies. Technological advances promise to reduce the costs associated with and further increase our capability to understand the complex influence of genetics on the pathogenesis of PD. AREAS TIMELY FOR DEVELOPING RESEARCH The coming years will require the enhancement of current techniques and the development of new ones to define PD's missing heritability. It will also require functional work to define better and in turn potentially reverse the mechanisms that contribute with large effect sizes to the risk of sporadic PD.
Collapse
Affiliation(s)
- Stephen Mullin
- Leonard Wolfson Clinical Research Fellow, UCL, Institute of Neurology, Rowland Hill Street, Hampstead, London NW3 2PF, UK
| | - Anthony Schapira
- Department of Clinical Neurosciences, UCL, Institute of Neurology, Hampstead, London, UK
| |
Collapse
|
80
|
Rodriguez M, Rodriguez-Sabate C, Morales I, Sanchez A, Sabate M. Parkinson's disease as a result of aging. Aging Cell 2015; 14:293-308. [PMID: 25677794 PMCID: PMC4406659 DOI: 10.1111/acel.12312] [Citation(s) in RCA: 136] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/16/2014] [Indexed: 12/15/2022] Open
Abstract
It is generally considered that Parkinson's disease is induced by specific agents that degenerate a clearly defined population of dopaminergic neurons. Data commented in this review suggest that this assumption is not as clear as is often thought and that aging may be critical for Parkinson's disease. Neurons degenerating in Parkinson's disease also degenerate in normal aging, and the different agents involved in the etiology of this illness are also involved in aging. Senescence is a wider phenomenon affecting cells all over the body, whereas Parkinson's disease seems to be restricted to certain brain centers and cell populations. However, reviewed data suggest that Parkinson's disease may be a local expression of aging on cell populations which, by their characteristics (high number of synaptic terminals and mitochondria, unmyelinated axons, etc.), are highly vulnerable to the agents promoting aging. The development of new knowledge about Parkinson's disease could be accelerated if the research on aging and Parkinson's disease were planned together, and the perspective provided by gerontology gains relevance in this field.
Collapse
Affiliation(s)
- Manuel Rodriguez
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La LagunaLa Laguna, Spain
- Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED)La Laguna, Spain
| | - Clara Rodriguez-Sabate
- Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED)La Laguna, Spain
| | - Ingrid Morales
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La LagunaLa Laguna, Spain
- Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED)La Laguna, Spain
| | - Alberto Sanchez
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La LagunaLa Laguna, Spain
| | - Magdalena Sabate
- Rehabilitation Service, Department of Pharmacology and Physical Medicine, Faculty of Medicine, University of La LagunaLa Laguna, Spain
| |
Collapse
|
81
|
van der Merwe C, Jalali Sefid Dashti Z, Christoffels A, Loos B, Bardien S. Evidence for a common biological pathway linking three Parkinson's disease-causing genes: parkin, PINK1 and DJ-1. Eur J Neurosci 2015; 41:1113-25. [PMID: 25761903 DOI: 10.1111/ejn.12872] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 01/29/2015] [Accepted: 02/10/2015] [Indexed: 12/21/2022]
Abstract
Parkinson's disease (PD) is characterised by the loss of dopaminergic neurons in the midbrain. Autosomal recessive, early-onset cases of PD are predominantly caused by mutations in the parkin, PINK1 and DJ-1 genes. Animal and cellular models have verified a direct link between parkin and PINK1, whereby PINK1 phosphorylates and activates parkin at the outer mitochondrial membrane, resulting in removal of dysfunctional mitochondria via mitophagy. Despite the overwhelming evidence for this interaction, few studies have been able to identify a link for DJ-1 with parkin or PINK1. The aim of this review is to summarise the functions of these three proteins, and to analyse the existing evidence for direct and indirect interactions between them. DJ-1 is able to rescue the phenotype of PINK1-knockout Drosophila models, but not of parkin-knockouts, suggesting that DJ-1 may act in a parallel pathway to that of the PINK1/parkin pathway. To further elucidate a commonality between these three proteins, bioinformatics analysis established that Miro (RHOT1) interacts with parkin and PINK1, and HSPA4 interacts with all three proteins. Furthermore, 30 transcription factors were found to be common amongst all three proteins, with many of them being involved in transcriptional regulation. Interestingly, expression of these proteins and their associated transcription factors are found to be significantly down-regulated in PD patients compared to healthy controls. In summary, this review provides insight into common pathways linking three PD-causing genes and highlights some key questions, the answers to which may provide critical insight into the disease process.
Collapse
Affiliation(s)
- Celia van der Merwe
- Division of Molecular Biology & Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, PO Box 19063, Cape Town, 7505, South Africa
| | | | | | | | | |
Collapse
|
82
|
Ye M, Zhou D, Zhou Y, Sun C. Parkinson's disease-associated PINK1 G309D mutation increases abnormal phosphorylation of Tau. IUBMB Life 2015; 67:286-90. [PMID: 25899925 DOI: 10.1002/iub.1367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Accepted: 02/12/2015] [Indexed: 11/12/2022]
Abstract
Mutations in PINK1 gene have been considered the second most common cause of Autosomal Recessive Parkinsonism (ARP). So far, different homozygous PINK1 mutations have been identified in different ARP patients. Abnormal hyperphosphorylation of tau leads to the loss of its biological activity. Multiple lines of evidence have demonstrated that hyperphosphorylated tau is associated with Alzheimer's disease and Parkinson's disease (PD). However, the effects of PD associated PINK1 mutations in tau phosphorylation are unknown. In this study, we investigated the effect of G309D PINK1 mutation in tau phosphorylation. Cells transfected with mutant G309D PINK1 exhibited a significant increase in the phosphorylation of tau protein at the PHF-1 (ser396/404) site. The levels of CDK5, an important activator of tau phosphorylation, did not change in mutant G309D PINK1 transfected cells, suggesting that CDK5 is not involved in tau phosphorylation induced by mutant G309D PINK1. Notably, we found that mutant G309D PINK1 significantly reduced phosphorylation of GSK3β at serine 9, suggesting that alterations in GSK3β activity play an essential role in mutant G309D PINK1-induced tau phosphorylation at the PHF-1 site. PP2A activity maintained consistent in mutant G309D PINK1 transfected cells, suggesting that the increased tau hyperphosphorylation is not ascribed to reduction in PP2A activity.
Collapse
Affiliation(s)
- Ming Ye
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Dai Zhou
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Youxin Zhou
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| | - Chunming Sun
- Department of Neurosurgery, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu Province, China
| |
Collapse
|
83
|
Giorgi C, Missiroli S, Patergnani S, Duszynski J, Wieckowski MR, Pinton P. Mitochondria-associated membranes: composition, molecular mechanisms, and physiopathological implications. Antioxid Redox Signal 2015; 22:995-1019. [PMID: 25557408 DOI: 10.1089/ars.2014.6223] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
SIGNIFICANCE In all cells, the endoplasmic reticulum (ER) and mitochondria are physically connected to form junctions termed mitochondria-associated membranes (MAMs). This subcellular compartment is under intense investigation because it represents a "hot spot" for the intracellular signaling of important pathways, including the synthesis of cholesterol and phospholipids, calcium homeostasis, and reactive oxygen species (ROS) generation and activity. RECENT ADVANCES The advanced methods currently used to study this fascinating intracellular microdomain in detail have enabled the identification of the molecular composition of MAMs and their involvement within different physiopathological contexts. CRITICAL ISSUES Here, we review the knowledge regarding (i) MAMs composition in terms of protein composition, (ii) the relationship between MAMs and ROS, (iii) the involvement of MAMs in cell death programs with particular emphasis within the tumor context, (iv) the emerging role of MAMs during inflammation, and (v) the key role of MAMs alterations in selected neurological disorders. FUTURE DIRECTIONS Whether alterations in MAMs represent a response to the disease pathogenesis or directly contribute to the disease has not yet been unequivocally established. In any case, the signaling at the MAMs represents a promising pharmacological target for several important human diseases.
Collapse
Affiliation(s)
- Carlotta Giorgi
- 1 Section of Pathology, Oncology and Experimental Biology, Laboratory for Technologies of Advanced Therapies (LTTA), Department of Morphology, Surgery and Experimental Medicine, University of Ferrara , Ferrara, Italy
| | | | | | | | | | | |
Collapse
|
84
|
Abstract
Parkinson disease (PD) is a degenerative disorder of the central nervous system resulting from depletion of dopaminergic neurons and currently remains incurable despite enormous international research efforts. The development of induced pluripotent stem cell (iPSC) technology opened up the unique possibility of studying disease mechanisms in human tissue that was otherwise not accessible, such as the brain. Of particular interest are the monogenetic forms of PD as they closely resemble the more common ‘idiopathic’ PD and, through the mutated protein, provide a clear research target in iPSC-derived neurons. Recessively inherited Parkin and PTEN-induced putative kinase 1 (PINK1) mutations have been investigated in this context and the present review describes the first insights gained from studies in iPSC-derived dopaminergic neurons, which comprise abnormalities in mitochondrial and dopamine homoeostasis, microtubular stability and axonal outgrowth. These new models of PD have a high translational potential that includes the identification of druggable targets, testing of known and novel therapeutic agents in the disease-relevant tissue using well-defined read-outs and potential regenerative approaches.
Collapse
|
85
|
Patel AS, Song JW, Chu SG, Mizumura K, Osorio JC, Shi Y, El-Chemaly S, Lee CG, Rosas IO, Elias JA, Choi AMK, Morse D. Epithelial cell mitochondrial dysfunction and PINK1 are induced by transforming growth factor-beta1 in pulmonary fibrosis. PLoS One 2015; 10:e0121246. [PMID: 25785991 PMCID: PMC4364993 DOI: 10.1371/journal.pone.0121246] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 02/11/2015] [Indexed: 01/08/2023] Open
Abstract
Background Epithelial cell death is a major contributor to fibrogenesis in the lung. In this study, we sought to determine the function of mitochondria and their clearance (mitophagy) in alveolar epithelial cell death and fibrosis. Methods We studied markers of mitochondrial injury and the mitophagy marker, PTEN-induced putative kinase 1 (PINK1), in IPF lung tissues by Western blotting, transmission electron microscopy (TEM), and immunofluorescence. In vitro experiments were carried out in lung epithelial cells stimulated with transforming growth factor-β1 (TGF-β1). Changes in cell function were measured by Western blotting, flow cytometry and immunofluorescence. In vivo experiments were performed using the murine bleomycin model of lung fibrosis. Results Evaluation of IPF lung tissue demonstrated increased PINK1 expression by Western blotting and immunofluorescence and increased numbers of damaged mitochondria by TEM. In lung epithelial cells, TGF-β1 induced mitochondrial depolarization, mitochondrial ROS, and PINK1 expression; all were abrogated by mitochondrial ROS scavenging. Finally, Pink1-/- mice were more susceptible than control mice to bleomycin induced lung fibrosis. Conclusion TGF-β1 induces lung epithelial cell mitochondrial ROS and depolarization and stabilizes the key mitophagy initiating protein, PINK1. PINK1 ameliorates epithelial cell death and may be necessary to limit fibrogenesis.
Collapse
Affiliation(s)
- Avignat S. Patel
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Jin Woo Song
- Department of Pulmonary and Critical Care Medicine, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, South Korea
- * E-mail:
| | - Sarah G. Chu
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Kenji Mizumura
- Department of Medicine, Weill Cornell Medical College, New York, New York, United States of America
| | - Juan C. Osorio
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Ying Shi
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Souheil El-Chemaly
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| | - Chun Geun Lee
- Section of Pulmonary and Critical Care Medicine, Yale University School of Medicine, New Haven, Connecticut, United States of America
| | - Ivan O. Rosas
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
- Pulmonary Fibrosis Program, Lovelace Respiratory Research Institute, Albuquerque, New Mexico, United States of America
| | - Jack A. Elias
- Alpert Medical School, Brown University, Providence, Rhode Island, United States of America
| | - Augustine M. K. Choi
- Department of Medicine, Weill Cornell Medical College, New York, New York, United States of America
| | - Danielle Morse
- Division of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts, United States of America
| |
Collapse
|
86
|
Le Grand JN, Gonzalez-Cano L, Pavlou MA, Schwamborn JC. Neural stem cells in Parkinson's disease: a role for neurogenesis defects in onset and progression. Cell Mol Life Sci 2015; 72:773-97. [PMID: 25403878 PMCID: PMC11113294 DOI: 10.1007/s00018-014-1774-1] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 10/09/2014] [Accepted: 11/03/2014] [Indexed: 12/27/2022]
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disorder, leading to a variety of motor and non-motor symptoms. Interestingly, non-motor symptoms often appear a decade or more before the first signs of motor symptoms. Some of these non-motor symptoms are remarkably similar to those observed in cases of impaired neurogenesis and several PD-related genes have been shown to play a role in embryonic or adult neurogenesis. Indeed, animal models deficient in Nurr1, Pitx3, SNCA and PINK1 display deregulated embryonic neurogenesis and LRRK2 and VPS35 have been implicated in neuronal development-related processes such as Wnt/β-catenin signaling and neurite outgrowth. Moreover, adult neurogenesis is affected in both PD patients and PD animal models and is regulated by dopamine and dopaminergic (DA) receptors, by chronic neuroinflammation, such as that observed in PD, and by differential expression of wild-type or mutant forms of PD-related genes. Indeed, an increasing number of in vivo studies demonstrate a role for SNCA and LRRK2 in adult neurogenesis and in the generation and maintenance of DA neurons. Finally, the roles of PD-related genes, SNCA, LRRK2, VPS35, Parkin, PINK1 and DJ-1 have been studied in NSCs, progenitor cells and induced pluripotent stem cells, demonstrating a role for some of these genes in stem/progenitor cell proliferation and maintenance. Together, these studies strongly suggest a link between deregulated neurogenesis and the onset and progression of PD and present strong evidence that, in addition to a neurodegenerative disorder, PD can also be regarded as a developmental disorder.
Collapse
Affiliation(s)
- Jaclyn Nicole Le Grand
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Laura Gonzalez-Cano
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Maria Angeliki Pavlou
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| | - Jens C. Schwamborn
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 4362 Esch-sur-Alzette, Luxembourg
| |
Collapse
|
87
|
Silencing of PINK1 inhibits insulin-like growth factor-1-mediated receptor activation and neuronal survival. J Mol Neurosci 2014; 56:188-97. [PMID: 25534921 DOI: 10.1007/s12031-014-0479-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 12/10/2014] [Indexed: 10/24/2022]
Abstract
The etiology of Parkinson's disease remains unknown. Mutations in PINK1 have provided an understanding of the molecular mechanisms of this pathology. PINK1 and Parkin are important in the dismissal of dysfunctional mitochondria. However, the role of PINK1 in the control of neuronal survival pathways is not clear. To determine the role of PINK1 in the control of the phosphatidyl inositol 3-kinase (PI3K)/Akt pathway mediated by insulin-like grow factor type 1 (IGF-1), we use a model of mesencephalic neurons (CAD cells), which were transfected with lentiviral PINK1 shRNA or control shRNA constructs. Silencing of PINK1 was determined by RT-PCR and immunoblotting; cell viability was analyzed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and lactate dehydrogenase (LDH) assays; proteins of the PI3K/Akt signaling pathway were tested by immunoblotting and IGF-1 receptor, and mitochondria were examined using fluorescence microscopy. PINK1 shRNA-transfected cells showed a reduction in cell survival compared to control shRNA cells. Exposure to IGF-1 induced a rapid and high increase in the phosphorylation level of IGF-1 receptor in control shRNA-transfected cells; however, silencing of PINK1 decreases phosphorylation level of IGF-1 receptor and downstream target proteins such as Akt, GSK3-beta, IRS-1, and hexokinase. Our results further suggest that PINK1 may be regulating the PI3K/Akt neuronal survival pathway through tyrosine kinase receptors such as IGF-1 receptor.
Collapse
|
88
|
Aerts L, Craessaerts K, De Strooper B, Morais VA. PINK1 kinase catalytic activity is regulated by phosphorylation on serines 228 and 402. J Biol Chem 2014; 290:2798-811. [PMID: 25527497 DOI: 10.1074/jbc.m114.620906] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Mutations in the PINK1 gene cause early-onset recessive Parkinson disease. PINK1 is a mitochondrially targeted kinase that regulates multiple aspects of mitochondrial biology, from oxidative phosphorylation to mitochondrial clearance. PINK1 itself is also phosphorylated, and this might be linked to the regulation of its multiple activities. Here we systematically analyze four previously identified phosphorylation sites in PINK1 for their role in autophosphorylation, substrate phosphorylation, and mitophagy. Our data indicate that two of these sites, Ser-228 and Ser-402, are autophosphorylated on truncated PINK1 but not on full-length PINK1, suggesting that the N terminus has an inhibitory effect on phosphorylation. We furthermore establish that phosphorylation of these PINK1 residues regulates the phosphorylation of the substrates Parkin and Ubiquitin. Especially Ser-402 phosphorylation appears to be important for PINK1 function because it is involved in Parkin recruitment and the induction of mitophagy. Finally, we identify Thr-313 as a residue that is critical for PINK1 catalytic activity, but, in contrast to previous reports, we find no evidence that this activity is regulated by phosphorylation. These data clarify the regulation of PINK1 through multisite phosphorylation.
Collapse
Affiliation(s)
- Liesbeth Aerts
- From the Center for the Biology of Disease, Flemish Institute for Biotechnology (VIB) and Center for Human Genetics, Leuven Institute for Neurodegenerative Disorders and University Hospitals Leuven, University of Leuven, 3000 Leuven, Belgium and
| | - Katleen Craessaerts
- From the Center for the Biology of Disease, Flemish Institute for Biotechnology (VIB) and Center for Human Genetics, Leuven Institute for Neurodegenerative Disorders and University Hospitals Leuven, University of Leuven, 3000 Leuven, Belgium and
| | - Bart De Strooper
- From the Center for the Biology of Disease, Flemish Institute for Biotechnology (VIB) and Center for Human Genetics, Leuven Institute for Neurodegenerative Disorders and University Hospitals Leuven, University of Leuven, 3000 Leuven, Belgium and the University College London, Institute of Neurology, Queen Square, London WC1N 3BG, United Kingdom
| | - Vanessa A Morais
- From the Center for the Biology of Disease, Flemish Institute for Biotechnology (VIB) and Center for Human Genetics, Leuven Institute for Neurodegenerative Disorders and University Hospitals Leuven, University of Leuven, 3000 Leuven, Belgium and
| |
Collapse
|
89
|
Gleave JA, Perri PD, Nash JE. Mitochondrial dysfunction in Parkinson’s disease: a possible target for neuroprotection. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s11515-014-1337-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
90
|
Pogson JH, Ivatt RM, Sanchez-Martinez A, Tufi R, Wilson E, Mortiboys H, Whitworth AJ. The complex I subunit NDUFA10 selectively rescues Drosophila pink1 mutants through a mechanism independent of mitophagy. PLoS Genet 2014; 10:e1004815. [PMID: 25412178 PMCID: PMC4238976 DOI: 10.1371/journal.pgen.1004815] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 10/11/2014] [Indexed: 01/08/2023] Open
Abstract
Mutations in PINK1, a mitochondrially targeted serine/threonine kinase, cause autosomal recessive Parkinson's disease (PD). Substantial evidence indicates that PINK1 acts with another PD gene, parkin, to regulate mitochondrial morphology and mitophagy. However, loss of PINK1 also causes complex I (CI) deficiency, and has recently been suggested to regulate CI through phosphorylation of NDUFA10/ND42 subunit. To further explore the mechanisms by which PINK1 and Parkin influence mitochondrial integrity, we conducted a screen in Drosophila cells for genes that either phenocopy or suppress mitochondrial hyperfusion caused by pink1 RNAi. Among the genes recovered from this screen was ND42. In Drosophila pink1 mutants, transgenic overexpression of ND42 or its co-chaperone sicily was sufficient to restore CI activity and partially rescue several phenotypes including flight and climbing deficits and mitochondrial disruption in flight muscles. Here, the restoration of CI activity and partial rescue of locomotion does not appear to have a specific requirement for phosphorylation of ND42 at Ser-250. In contrast to pink1 mutants, overexpression of ND42 or sicily failed to rescue any Drosophila parkin mutant phenotypes. We also find that knockdown of the human homologue, NDUFA10, only minimally affecting CCCP-induced mitophagy, and overexpression of NDUFA10 fails to restore Parkin mitochondrial-translocation upon PINK1 loss. These results indicate that the in vivo rescue is due to restoring CI activity rather than promoting mitophagy. Our findings support the emerging view that PINK1 plays a role in regulating CI activity separate from its role with Parkin in mitophagy. Two genes linked to heritable forms of the neurodegenerative movement disorder Parkinson's disease (PD), PINK1 and parkin, play important roles in mitochondrial homeostasis through mechanisms which include the degradation of dysfunctional mitochondria, termed mitophagy, and the maintenance of complex I (CI) activity. Here we report the findings of an RNAi based screen in Drosophila cells for genes that may regulate the PINK1-Parkin pathway which identified NDUFA10 (ND42 in Drosophila), a subunit of CI. Using a well-established cellular system and in vivo Drosophila genetics, we demonstrate that while NDUFA10/ND42 only plays a minimal role in mitophagy, restoration of CI activity through overexpression of either ND42 or its co-chaperone sicily is able to substantially rescue behavioral deficits in pink1 mutants but not parkin mutants. Moreover, while parkin overexpression is known to rescue pink1 mutants, it apparently achieves this without restoring CI activity. These results suggest that increasing CI activity or promoting mitophagy can be beneficial in pink1 mutants, and further highlights separable functions of PINK1 and Parkin.
Collapse
Affiliation(s)
- Joe H. Pogson
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Rachael M. Ivatt
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Alvaro Sanchez-Martinez
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Roberta Tufi
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Emma Wilson
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Heather Mortiboys
- Sheffield Institute for Translational Neuroscience, University of Sheffield, Sheffield, United Kingdom
| | - Alexander J. Whitworth
- MRC Centre for Developmental and Biomedical Genetics, Sheffield, United Kingdom
- Department of Biomedical Sciences, University of Sheffield, Sheffield, United Kingdom
- * E-mail:
| |
Collapse
|
91
|
Is Cytoplasmic PTEN a Specific Target for Neuronal Survival? Mol Neurobiol 2014; 52:1758-1764. [DOI: 10.1007/s12035-014-8922-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 09/30/2014] [Indexed: 01/16/2023]
|
92
|
Woodard CM, Campos BA, Kuo SH, Nirenberg MJ, Nestor MW, Zimmer M, Mosharov EV, Sulzer D, Zhou H, Paull D, Clark L, Schadt EE, Sardi SP, Rubin L, Eggan K, Brock M, Lipnick S, Rao M, Chang S, Li A, Noggle SA. iPSC-derived dopamine neurons reveal differences between monozygotic twins discordant for Parkinson's disease. Cell Rep 2014; 9:1173-82. [PMID: 25456120 DOI: 10.1016/j.celrep.2014.10.023] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 09/03/2014] [Accepted: 10/10/2014] [Indexed: 01/01/2023] Open
Abstract
Parkinson's disease (PD) has been attributed to a combination of genetic and nongenetic factors. We studied a set of monozygotic twins harboring the heterozygous glucocerebrosidase mutation (GBA N370S) but clinically discordant for PD. We applied induced pluripotent stem cell (iPSC) technology for PD disease modeling using the twins' fibroblasts to evaluate and dissect the genetic and nongenetic contributions. Utilizing fluorescence-activated cell sorting, we obtained a homogenous population of "footprint-free" iPSC-derived midbrain dopaminergic (mDA) neurons. The mDA neurons from both twins had ∼50% GBA enzymatic activity, ∼3-fold elevated α-synuclein protein levels, and a reduced capacity to synthesize and release dopamine. Interestingly, the affected twin's neurons showed an even lower dopamine level, increased monoamine oxidase B (MAO-B) expression, and impaired intrinsic network activity. Overexpression of wild-type GBA and treatment with MAO-B inhibitors normalized α-synuclein and dopamine levels, suggesting a combination therapy for the affected twin.
Collapse
Affiliation(s)
- Chris M Woodard
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Brian A Campos
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Sheng-Han Kuo
- Department of Neurology, Columbia University, New York, NY 10032, USA
| | | | - Michael W Nestor
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Matthew Zimmer
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Eugene V Mosharov
- Department of Neurology, Columbia University, New York, NY 10032, USA
| | - David Sulzer
- Department of Neurology, Columbia University, New York, NY 10032, USA; Departments of Psychiatry, Pharmacology, Columbia University, New York, NY 10032, USA; New York State Psychiatric Institute, New York, NY 10032, USA
| | - Hongyan Zhou
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Daniel Paull
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Lorraine Clark
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032, USA
| | - Eric E Schadt
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - Lee Rubin
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Kevin Eggan
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; The Howard Hughes Medical Institute, Harvard Stem Cell Institute, Stanley Center for Psychiatric Research, Harvard University, Cambridge, MA 02138, USA
| | - Mathew Brock
- Axion Biosystems, 1819 Peachtree Road, Suite 350, Atlanta, GA 30309, USA
| | - Scott Lipnick
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Mahendra Rao
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Stephen Chang
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA
| | - Aiqun Li
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA.
| | - Scott A Noggle
- The New York Stem Cell Foundation Research Institute, New York, NY 10032, USA.
| |
Collapse
|
93
|
PINK1 signalling in cancer biology. Biochim Biophys Acta Rev Cancer 2014; 1846:590-8. [PMID: 25450579 DOI: 10.1016/j.bbcan.2014.10.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 09/29/2014] [Accepted: 10/20/2014] [Indexed: 02/08/2023]
Abstract
PTEN-induced kinase 1 (PINK1) was identified initially in cancer cells as a gene up-regulated by overexpression of the major tumor suppressor, PTEN. Loss-of-function mutations in PINK1 were discovered subsequently to cause autosomal recessive Parkinson's disease. Substantial work during the past decade has revealed that PINK1 regulates several primary cellular processes of significance in cancer cell biology, including cell survival, stress resistance, mitochondrial homeostasis and the cell cycle. Mechanistically, PINK1 has been shown to interact on a number of levels with the pivotal oncogenic PI3-kinase/Akt/mTOR signalling axis and to control critical mitochondrial and metabolic functions that regulate cancer survival, growth, stress resistance and the cell cycle. A cytoprotective and chemoresistant function for PINK1 has been highlighted by some studies, supporting PINK1 as a target in cancer therapeutics. This article reviews the function of PINK1 in cancer cell biology, with an emphasis on the mechanisms by which PINK1 interacts with PI3-kinase/Akt signalling, mitochondrial homeostasis, and the potential context-dependent pro- and anti-tumorigenic functions of PINK1.
Collapse
|
94
|
Gispert S, Brehm N, Weil J, Seidel K, Rüb U, Kern B, Walter M, Roeper J, Auburger G. Potentiation of neurotoxicity in double-mutant mice with Pink1 ablation and A53T-SNCA overexpression. Hum Mol Genet 2014; 24:1061-76. [PMID: 25296918 PMCID: PMC4986551 DOI: 10.1093/hmg/ddu520] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The common age-related neurodegeneration of Parkinson's disease can result from dominant causes like increased dosage of vesicle-associated alpha-synuclein (SNCA) or recessive causes like deficiency of mitophagy factor PINK1. Interactions between these triggers and their convergence onto shared pathways are crucial, but currently conflicting evidence exists. Here, we crossed previously characterized mice with A53T-SNCA overexpression and with Pink1 deletion to generate double mutants (DMs). We studied their lifespan and behavior, histological and molecular anomalies at late and early ages. DM animals showed potentiated phenotypes in comparison with both single mutants (SMs), with reduced survival and strongly reduced spontaneous movements from the age of 3 months onwards. In contrast to SMs, a quarter of DM animals manifested progressive paralysis at ages >1 year and exhibited protein aggregates immunopositive for pSer129-SNCA, p62 and ubiquitin in spinal cord and basal brain. Brain proteome quantifications of ubiquitination sites documented altered degradation of SNCA and the DNA-damage marker H2AX at the age of 18 months. Global brain transcriptome profiles and qPCR validation experiments identified many consistent transcriptional dysregulations already at the age of 6 weeks, which were absent from SMs. The observed downregulations for Dapk1, Dcaf17, Rab42 and the novel SNCA-marker Lect1 as well as the upregulations for Dctn5, Mrpl9, Tmem181a, Xaf1 and H2afx reflect changes in ubiquitination, mitochondrial/synaptic/microtubular/cell adhesion dynamics and DNA damage. Thus, our study confirmed that SNCA-triggered neurotoxicity is exacerbated by the absence of PINK1 and identified a novel molecular signature that is detectable early in the course of this double pathology.
Collapse
Affiliation(s)
- Suzana Gispert
- Experimental Neurology, Department of Neurology, Goethe University Medical School, Building 89, 3rd floor, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany
| | - Nadine Brehm
- Experimental Neurology, Department of Neurology, Goethe University Medical School, Building 89, 3rd floor, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany
| | - Jonas Weil
- Experimental Neurology, Department of Neurology, Goethe University Medical School, Building 89, 3rd floor, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany
| | - Kay Seidel
- Dr. Senckenbergisches Chronomedizinisches Institut, Goethe-University Medical School, 60590 Frankfurt/Main, Germany
| | - Udo Rüb
- Dr. Senckenbergisches Chronomedizinisches Institut, Goethe-University Medical School, 60590 Frankfurt/Main, Germany
| | - Beatrice Kern
- Institute of Neurophysiology, Neuroscience Center, Goethe University Frankfurt, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany and
| | - Michael Walter
- Institute for Medical Genetics, Eberhard-Karls-University of Tuebingen, 72076 Tübingen, Germany
| | - Jochen Roeper
- Institute of Neurophysiology, Neuroscience Center, Goethe University Frankfurt, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany and
| | - Georg Auburger
- Experimental Neurology, Department of Neurology, Goethe University Medical School, Building 89, 3rd floor, Theodor Stern Kai 7, 60590 Frankfurt am Main, Germany,
| |
Collapse
|
95
|
Rodriguez M, Morales I, Rodriguez-Sabate C, Sanchez A, Castro R, Brito JM, Sabate M. The degeneration and replacement of dopamine cells in Parkinson's disease: the role of aging. Front Neuroanat 2014; 8:80. [PMID: 25147507 PMCID: PMC4124707 DOI: 10.3389/fnana.2014.00080] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 07/22/2014] [Indexed: 01/06/2023] Open
Abstract
Available data show marked similarities for the degeneration of dopamine cells in Parkinson’s disease (PD) and aging. The etio-pathogenic agents involved are very similar in both cases, and include free radicals, different mitochondrial disturbances, alterations of the mitophagy and the ubiquitin-proteasome system. Proteins involved in PD such as α-synuclein, UCH-L1, PINK1 or DJ-1, are also involved in aging. The anomalous behavior of astrocytes, microglia and stem cells of the subventricular zone (SVZ) also changes similarly in aging brains and PD. Present data suggest that PD could be the expression of aging on a cell population with high vulnerability to aging. The future knowledge of mechanisms involved in aging could be critical for both understanding the etiology of PD and developing etiologic treatments to prevent the onset of this neurodegenerative illness and to control its progression.
Collapse
Affiliation(s)
- Manuel Rodriguez
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain ; Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED) Madrid, Spain
| | - Ingrid Morales
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain ; Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED) Madrid, Spain
| | - Clara Rodriguez-Sabate
- Center for Networked Biomedical Research in Neurodegenerative Diseases (CIBERNED) Madrid, Spain
| | - Alberto Sanchez
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain
| | - Rafael Castro
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain
| | - Jose Miguel Brito
- Laboratory of Neurobiology and Experimental Neurology, Department of Physiology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain
| | - Magdalena Sabate
- Rehabilitation Service, Department of Physical Medicine and Pharmacology, Faculty of Medicine, University of La Laguna La Laguna, Tenerife, Canary Islands, Spain
| |
Collapse
|
96
|
Yang XP, Liu TY, Qin XY, Yu LC. Potential protection of 2,3,5,4'-tetrahydroxystilbene-2-O-β-D-glucoside against staurosporine-induced toxicity on cultured rat hippocampus neurons. Neurosci Lett 2014; 576:79-83. [PMID: 24887581 DOI: 10.1016/j.neulet.2014.05.045] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 05/04/2014] [Accepted: 05/21/2014] [Indexed: 01/10/2023]
Abstract
The present study explored the effect of 2,3,5,4'-tetrahydroxystilbene-2-O-β-d-glucoside (THSG) on the staurosporine (STS)-induced toxicity in cultured rat hippocampal neurons. The results showed that administration of 200μM of THSG significantly protected against 0.3μM of STS-induced apoptosis in cultured rat hippocampal neurons tested by methyl thiazolyl tetrazolium (MTT) and terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling (TUNEL) assays. Furthermore, when the Akt signaling pathway was blocked by LY294002, an inhibitor of Phosphatidyl Inositol 3-kinase (PI3K), the protective effects of THSG against STS-induced neurotoxicity were abrogated. We further examined the involvement of PI3K/Akt signaling pathway in THSG protection against STS-induced cytotoxicity on cultured neurons and found that administration of THSG significantly inhibited the STS-induced decreases in the content of phosphorylated AKt (p-Akt). Moreover, we found that THSG rescued the down-regulation of B cell lymphoma/lewkmia-2 (Bcl2) and pro-caspase-3 (pro-Csp3) caused by STS in the neurons. These results indicate that THSG protect the cultured rat hippocampal neurons against STS-induced cytotoxicity and the PI3K/Akt signaling and mitochondrial apoptotic pathways are involved in the THSG-induced protective effects.
Collapse
Affiliation(s)
- Xiao-Ping Yang
- Laboratory of Biotechnology and State Key Laboratory of Chinese Ethnic Minority Traditional Medicine, College of Life & Environmental Science, Minzu University of China, Beijing 100081, China
| | - Tao-Yan Liu
- Laboratory of Biotechnology and State Key Laboratory of Chinese Ethnic Minority Traditional Medicine, College of Life & Environmental Science, Minzu University of China, Beijing 100081, China
| | - Xiao-Yan Qin
- Laboratory of Biotechnology and State Key Laboratory of Chinese Ethnic Minority Traditional Medicine, College of Life & Environmental Science, Minzu University of China, Beijing 100081, China.
| | - Long-Chuan Yu
- Laboratory of Neurobiology and State Key Laboratory of Biomembrane and Membrane Biotechnology, College of Life Sciences, Peking University, Beijing 100871, China.
| |
Collapse
|
97
|
Matenia D, Mandelkow EM. Emerging modes of PINK1 signaling: another task for MARK2. Front Mol Neurosci 2014; 7:37. [PMID: 24847206 PMCID: PMC4021145 DOI: 10.3389/fnmol.2014.00037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 04/19/2014] [Indexed: 11/26/2022] Open
Abstract
PTEN-induced kinase 1 (PINK1) acts at multiple levels to promote mitochondrial health, including regulatory influence on ATP-synthesis, protein quality control, apoptosis, mitochondrial transport, and destiny. PINK1 mutations are linked to Parkinson disease (PD) and mostly result in loss of kinase activity. But the molecular events responsible for neuronal death as well as the physiological targets and regulators of PINK1 are still a matter of debate. This review highlights the recent progress evolving the cellular functions of the cytosolic pool of PINK1 in mitochondrial trafficking and neuronal differentiation. Regulation of PINK1 signaling occurs by mitochondrial processing to truncated forms of PINK1, differentially targeted to several subcellular compartments. The first identified activating kinase of PINK1 is MAP/microtubule affinity regulating kinase 2 (MARK2), which phosphorylates T313, a frequent mutation site linked to PD. Kinases of the MARK2 family perform diverse functions in neuronal polarity, transport, migration, and neurodegeneration such as Alzheimer disease (AD). This new protein kinase signaling axis might provide a link between neurodegenerative processes in AD and PD diseases and opens novel possibilities in targeting pathological signaling processes.
Collapse
Affiliation(s)
- Dorthe Matenia
- Max-Planck-Institute for Neurological Research Hamburg, Germany
| | - Eva M Mandelkow
- Max-Planck-Institute for Neurological Research Hamburg, Germany ; German Center for Neurodegenerative Diseases-Center of Advanced European Studies and Research Bonn, Germany
| |
Collapse
|
98
|
Deas E, Piipari K, Machhada A, Li A, Gutierrez-del-Arroyo A, Withers DJ, Wood NW, Abramov AY. PINK1 deficiency in β-cells increases basal insulin secretion and improves glucose tolerance in mice. Open Biol 2014; 4:140051. [PMID: 24806840 PMCID: PMC4042854 DOI: 10.1098/rsob.140051] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The Parkinson's disease (PD) gene, PARK6, encodes the PTEN-induced putative kinase 1 (PINK1) mitochondrial kinase, which provides protection against oxidative stress-induced apoptosis. Given the link between glucose metabolism, mitochondrial function and insulin secretion in β-cells, and the reported association of PD with type 2 diabetes, we investigated the response of PINK1-deficient β-cells to glucose stimuli to determine whether loss of PINK1 affected their function. We find that loss of PINK1 significantly impairs the ability of mouse pancreatic β-cells (MIN6 cells) and primary intact islets to take up glucose. This was accompanied by higher basal levels of intracellular calcium leading to increased basal levels of insulin secretion under low glucose conditions. Finally, we investigated the effect of PINK1 deficiency in vivo and find that PINK1 knockout mice have improved glucose tolerance. For the first time, these combined results demonstrate that loss of PINK1 function appears to disrupt glucose-sensing leading to enhanced insulin release, which is uncoupled from glucose uptake, and suggest a key role for PINK1 in β-cell function.
Collapse
Affiliation(s)
- Emma Deas
- Department of Molecular Neuroscience, UCL Institute of Neurology, Queen Square, London WC1N 3BG, UK
| | | | | | | | | | | | | | | |
Collapse
|
99
|
Parganlija D, Klinkenberg M, Domínguez-Bautista J, Hetzel M, Gispert S, Chimi MA, Dröse S, Mai S, Brandt U, Auburger G, Jendrach M. Loss of PINK1 impairs stress-induced autophagy and cell survival. PLoS One 2014; 9:e95288. [PMID: 24751806 PMCID: PMC3994056 DOI: 10.1371/journal.pone.0095288] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Accepted: 03/26/2014] [Indexed: 11/25/2022] Open
Abstract
The mitochondrial kinase PINK1 and the ubiquitin ligase Parkin are participating in quality control after CCCP- or ROS-induced mitochondrial damage, and their dysfunction is associated with the development and progression of Parkinson's disease. Furthermore, PINK1 expression is also induced by starvation indicating an additional role for PINK1 in stress response. Therefore, the effects of PINK1 deficiency on the autophago-lysosomal pathway during stress were investigated. Under trophic deprivation SH-SY5Y cells with stable PINK1 knockdown showed downregulation of key autophagic genes, including Beclin, LC3 and LAMP-2. In good agreement, protein levels of LC3-II and LAMP-2 but not of LAMP-1 were reduced in different cell model systems with PINK1 knockdown or knockout after addition of different stressors. This downregulation of autophagic factors caused increased apoptosis, which could be rescued by overexpression of LC3 or PINK1. Taken together, the PINK1-mediated reduction of autophagic key factors during stress resulted in increased cell death, thus defining an additional pathway that could contribute to the progression of Parkinson's disease in patients with PINK1 mutations.
Collapse
Affiliation(s)
- Dajana Parganlija
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Michael Klinkenberg
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Jorge Domínguez-Bautista
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Miriam Hetzel
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Suzana Gispert
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Marthe A. Chimi
- Molecular Bioenergetics Group, Goethe University Medical School, Frankfurt/Main, Germany
| | - Stefan Dröse
- Molecular Bioenergetics Group, Goethe University Medical School, Frankfurt/Main, Germany
- Clinic of Anesthesiology, Intensive-Care Medicine and Pain Therapy, Goethe-University Hospital, Frankfurt am Main, Germany
| | - Sören Mai
- Kinematic Cell Research Group, Institute for Cell Biology and Neuroscience, Center of Excellence Frankfurt: Macromolecular Complexes, Goethe University, Frankfurt/Main, Germany
| | - Ulrich Brandt
- Molecular Bioenergetics Group, Goethe University Medical School, Frankfurt/Main, Germany
| | - Georg Auburger
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
| | - Marina Jendrach
- Experimental Neurology, Dept. of Neurology, Goethe University Medical School, Frankfurt/Main, Germany
- * E-mail:
| |
Collapse
|
100
|
Camilleri A, Vassallo N. The centrality of mitochondria in the pathogenesis and treatment of Parkinson's disease. CNS Neurosci Ther 2014; 20:591-602. [PMID: 24703487 DOI: 10.1111/cns.12264] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 03/07/2014] [Accepted: 03/08/2014] [Indexed: 12/14/2022] Open
Abstract
Parkinson's disease (PD) is an incurable neurodegenerative disorder leading to progressive motor impairment and for which there is no cure. From the first postmortem account describing a lack of mitochondrial complex I in the substantia nigra of PD sufferers, the direct association between mitochondrial dysfunction and death of dopaminergic neurons has ever since been consistently corroborated. In this review, we outline common pathways shared by both sporadic and familial PD that remarkably and consistently converge at the level of mitochondrial integrity. Furthermore, such knowledge has incontrovertibly established mitochondria as a valid therapeutic target in neurodegeneration. We discuss several mitochondria-directed therapies that promote the preservation, rescue, or restoration of dopaminergic neurons and which have been identified in the laboratory and in preclinical studies. Some of these have progressed to clinical trials, albeit the identification of an unequivocal disease-modifying neurotherapeutic is still elusive. The challenge is therefore to improve further, not least by more research on the molecular mechanisms and pathophysiological consequences of mitochondrial dysfunction in PD.
Collapse
Affiliation(s)
- Angelique Camilleri
- Department of Physiology and Biochemistry, University of Malta, Msida 2080, Malta
| | | |
Collapse
|