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Guo B, Zheng C, Cao J, Qiu X, Luo F, Li H, Lee SM, Yang X, Zhang G, Sun Y, Zhang Z, Wang Y. Tetramethylpyrazine Nitrone Promotes the Clearance of Alpha-Synuclein via Nrf2-Mediated Ubiquitin-Proteasome System Activation. Neuromolecular Med 2024; 26:9. [PMID: 38568291 DOI: 10.1007/s12017-024-08775-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 02/21/2024] [Indexed: 04/05/2024]
Abstract
Aggregation of α-synuclein (α-syn) and α-syn cytotoxicity are hallmarks of sporadic and familial Parkinson's disease (PD). Nuclear factor (erythroid-derived 2)-like 2 (Nrf2)-dependent enhancement of the expression of the 20S proteasome core particles (20S CPs) and regulatory particles (RPs) increases proteasome activity, which can promote α-syn clearance in PD. Activation of peroxisome proliferator-activated receptor γ co-activator 1α (PGC-1α) may reduce oxidative stress by strongly inducing Nrf2 gene expression. In the present study, tetramethylpyrazine nitrone (TBN), a potent-free radical scavenger, promoted α-syn clearance by the ubiquitin-proteasome system (UPS) in cell models overexpressing the human A53T mutant α-syn. In the α-syn transgenic mice model, TBN improved motor impairment, decreased the products of oxidative damage, and down-regulated the α-syn level in the serum. TBN consistently up-regulated PGC-1α and Nrf2 expression in tested models of PD. Additionally, TBN similarly enhanced the proteasome 20S subunit beta 8 (Psmb8) expression, which is linked to chymotrypsin-like proteasome activity. Furthermore, TBN increased the mRNA levels of both the 11S RPs subunits Pa28αβ and a proteasome chaperone, known as the proteasome maturation protein (Pomp). Interestingly, specific siRNA targeting of Nrf2 blocked TBN's effects on Psmb8, Pa28αβ, Pomp expression, and α-syn clearance. In conclusion, TBN promotes the clearance of α-syn via Nrf2-mediated UPS activation, and it may serve as a potentially disease-modifying therapeutic agent for PD.
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Affiliation(s)
- Baojian Guo
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
| | - Chengyou Zheng
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
- School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, 518055, China
| | - Jie Cao
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
| | - Xiaoling Qiu
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
| | - Fangcheng Luo
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
| | - Haitao Li
- Department of Bioengineering, Zhuhai Campus of Zunyi Medical University, Zhuhai, 519041, China
| | - Simon Mingyuan Lee
- Institute of Chinese Medical Sciences and State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Avenida da Universidade, Taipa, 999078, Macao SAR, China
| | - Xifei Yang
- Key Laboratory of Modern Toxicology of Shenzhen, Center for Disease Control and Prevention, No. 8, Longyuan Road, Nanshan District, Shenzhen, 518055, China
| | - Gaoxiao Zhang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
| | - Yewei Sun
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China.
| | - Zaijun Zhang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China.
| | - Yuqiang Wang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-Cerebrovascular Diseases, and Institute of New Drug Research, Jinan University College of Pharmacy, 601# Huangpu Road, Guangzhou, 510632, China
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2
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Fagen SJ, Burgess JD, Lim MJ, Amerna D, Kaya ZB, Faroqi AH, Perisetla P, DeMeo NN, Stojkovska I, Quiriconi DJ, Mazzulli JR, Delenclos M, Boschen SL, McLean PJ. Honokiol decreases alpha-synuclein mRNA levels and reveals novel targets for modulating alpha-synuclein expression. Front Aging Neurosci 2023; 15:1179086. [PMID: 37637959 PMCID: PMC10449643 DOI: 10.3389/fnagi.2023.1179086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/17/2023] [Indexed: 08/29/2023] Open
Abstract
Background Intracytoplasmic inclusions comprised of aggregated alpha-synuclein (αsyn) represent a key histopathological feature of neurological disorders collectively termed "synucleinopathies," which includes Parkinson's disease (PD). Mutations and multiplications in the SNCA gene encoding αsyn cause familial forms of PD and a large body of evidence indicate a correlation between αsyn accumulation and disease. Decreasing αsyn expression is recognized as a valid target for PD therapeutics, with down-regulation of SNCA expression potentially attenuating downstream cascades of pathologic events. Here, we evaluated if Honokiol (HKL), a polyphenolic compound derived from magnolia tree bark with demonstrated neuroprotective properties, can modulate αsyn levels in multiple experimental models. Methods Human neuroglioma cells stably overexpressing αsyn, mouse primary neurons, and human iPSC-derived neurons were exposed to HKL and αsyn protein and SNCA messenger RNA levels were assessed. The effect of HKL on rotenone-induced overexpression of αsyn levels was further assessed and transcriptional profiling of mouse cortical neurons treated with HKL was performed to identify potential targets of HKL. Results We demonstrate that HKL can successfully reduce αsyn protein levels and SNCA expression in multiple in vitro models of PD with our data supporting a mechanism whereby HKL acts by post-transcriptional modulation of SNCA rather than modulating αsyn protein degradation. Transcriptional profiling of mouse cortical neurons treated with HKL identifies several differentially expressed genes (DEG) as potential targets to modulate SNCA expression. Conclusion This study supports a HKL-mediated downregulation of SNCA as a viable strategy to modify disease progression in PD and other synucleinopathies. HKL has potential as a powerful tool for investigating SNCA gene modulation and its downstream effects.
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Affiliation(s)
- Sara J. Fagen
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Jeremy D. Burgess
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Rochester, MN, United States
| | - Melina J. Lim
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Danilyn Amerna
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Zeynep B. Kaya
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Ayman H. Faroqi
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Rochester, MN, United States
| | - Priyanka Perisetla
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Natasha N. DeMeo
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Iva Stojkovska
- Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Drew J. Quiriconi
- Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Joseph R. Mazzulli
- Feinberg School of Medicine, Northwestern University, Chicago, IL, United States
| | - Marion Delenclos
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
| | - Suelen L. Boschen
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Rochester, MN, United States
- Department of Neurosurgery, Mayo Clinic, Jacksonville, FL, United States
| | - Pamela J. McLean
- Department of Neuroscience, Mayo Clinic, Jackson ville, FL, United States
- Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic College of Medicine, Rochester, MN, United States
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The Role of α-Synuclein in SNARE-mediated Synaptic Vesicle Fusion. J Mol Biol 2023; 435:167775. [PMID: 35931109 DOI: 10.1016/j.jmb.2022.167775] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2022] [Revised: 07/28/2022] [Accepted: 07/28/2022] [Indexed: 02/04/2023]
Abstract
Neuronal communication depends on exquisitely regulated membrane fusion between synaptic vesicles and presynaptic neurons, which results in neurotransmitter release in precisely timed patterns. Presynaptic dysfunctions are known to occur prior to the onset of neurodegenerative diseases, including Parkinson's disease. Synaptic accumulation of α-synuclein (α-Syn) oligomers has been implicated in the pathway leading to such outcomes. α-Syn oligomers exert aberrant effects on presynaptic fusion machinery through their interactions with synaptic vesicles and proteins. Here, we summarize in vitro bulk and single-vesicle assays for investigating the functions of α-Syn monomers and oligomers in synaptic vesicle fusion and then discuss the current understanding of the roles of α-Syn monomers and oligomers in synaptic vesicle fusion. Finally, we suggest a new therapeutic avenue specifically targeting the mechanisms of α-Syn oligomer toxicity rather than the oligomer itself.
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Association between β2-Adrenoreceptor Medications and Risk of Parkinson's Disease: A Meta-Analysis. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:medicina57101006. [PMID: 34684044 PMCID: PMC8541298 DOI: 10.3390/medicina57101006] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/16/2021] [Accepted: 09/21/2021] [Indexed: 11/17/2022]
Abstract
Background and Objective: Parkinson’s disease (PD) is a progressive neurological disorder characterized by an accumulation of Lewy bodies and degeneration of dopaminergic neurons in the substantia nigra. The treatment options currently available are only partly effective and fail to restore the lost dopaminergic neurons or slow the progression. β2-adrenoceptors (β2AR) are widely expressed in various human tissues and organs, regulate many important metabolic functions, and are targeted for treatment of various diseases. Studies have reported a link between chronic use of the β2AR antagonist propranolol and an increased risk of PD, and chronic use of β2AR agonists has been associated with a decreased risk of PD. We conducted a meta-analysis on the association between both β2AR agonist level and β2AR antagonist level and the risk of PD. Materials and Methods: A comprehensive electronic search was conducted on the databases of PubMed, ScienceDirect, ProQuest, Cochrane Library, and ClinicalKey from the start of each database until 30 June 2021. The objective was to identify prospective cohort and case–control studies that have reported on the association between β-adrenoceptor agonist level, antagonist level, and PD risk. Results: A meta-analysis of the data extracted from eight studies revealed that β2AR agonist use was associated with reduced PD risk (RR = 0.859, 95% confidence interval [CI] 0.741–0.995. p = 0.043). Compared with the control group, β2AR antagonist use was associated with an increased risk of PD (RR = 1.490, 95% CI, 1.195 to 1.857. p < 0.005). Propranolol, a type of β2AR antagonist, was related to an increased risk of PD (RR = 2.820, 95% CI, 2.618 to 3.036. p < 0.005). Conclusions: In this meta-analysis, β2AR agonists were associated with a decreased risk of PD, and β2AR antagonists were related with an increased risk of PD. However, further studies with larger sample sizes and an evaluation of the long-term effects of varying dosages of medications are needed.
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Yoo G, Yeou S, Son JB, Shin YK, Lee NK. Cooperative inhibition of SNARE-mediated vesicle fusion by α-synuclein monomers and oligomers. Sci Rep 2021; 11:10955. [PMID: 34040104 PMCID: PMC8155056 DOI: 10.1038/s41598-021-90503-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 05/12/2021] [Indexed: 11/09/2022] Open
Abstract
The primary hallmark of Parkinson's disease (PD) is the generation of Lewy bodies of which major component is α-synuclein (α-Syn). Because of increasing evidence of the fundamental roles of α-Syn oligomers in disease progression, α-Syn oligomers have become potential targets for therapeutic interventions for PD. One of the potential toxicities of α-Syn oligomers is their inhibition of SNARE-mediated vesicle fusion by specifically interacting with vesicle-SNARE protein synaptobrevin-2 (Syb2), which hampers dopamine release. Here, we show that α-Syn monomers and oligomers cooperatively inhibit neuronal SNARE-mediated vesicle fusion. α-Syn monomers at submicromolar concentrations increase the fusion inhibition by α-Syn oligomers. This cooperative pathological effect stems from the synergically enhanced vesicle clustering. Based on this cooperative inhibition mechanism, we reverse the fusion inhibitory effect of α-Syn oligomers using small peptide fragments. The small peptide fragments, derivatives of α-Syn, block the binding of α-Syn oligomers to Syb2 and dramatically reverse the toxicity of α-Syn oligomers in vesicle fusion. Our findings demonstrate a new strategy for therapeutic intervention in PD and related diseases based on this specific interaction of α-Syn.
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Affiliation(s)
- Gyeongji Yoo
- School of Interdisciplinary Bioscience and Bioengineering, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Sanghun Yeou
- Department of Physics, Pohang University of Science and Technology, Pohang, 37673, Korea
| | - Jung Bae Son
- Department of Chemistry, Seoul National University, Seoul, 08826, Korea
| | - Yeon-Kyun Shin
- Roy J. Carver Department of Biochemistry, Biophysics and Molecular Biology, Iowa State University, Ames, IA, 50011, USA
| | - Nam Ki Lee
- Department of Chemistry, Seoul National University, Seoul, 08826, Korea.
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Fabbri M, Perez-Lloret S, Rascol O. Therapeutic strategies for Parkinson's disease: promising agents in early clinical development. Expert Opin Investig Drugs 2020; 29:1249-1267. [PMID: 32853086 DOI: 10.1080/13543784.2020.1814252] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
INTRODUCTION To date, no drug has demonstrated clinically indisputable neuroprotective efficacy in Parkinson's disease (PD). We also have no effective symptomatic treatment for disabling symptoms such as balance problems, and dementia, and we need to improve the efficacy and safety profile of drugs currently used in the management of motor complications. AREAS COVERED We examine the agents which appear to have most therapeutic promise based on concepts, feasibility in a reasonable time frame, and available clinical data and place an emphasis on disease-modifying treatments. PUBMED and Clinicaltrials.gov databases were searched for Phase I and II randomized trials for symptomatic or disease-modifying treatments considering only studies that began since 2010 or that were completed after 2015, up to 30 April 2020. EXPERT OPINION Encouraging progress has been made in our understanding of molecular pathways. We find passive immunization approaches against α-synuclein, LRRK2 kinase inhibitors, and treatment that can increase GCase activity, which have shown some efficacy on both GBA-mutated and non-mutated PD patients. The recognition of non-dopaminergic impairment and the prominent role of non-motor symptoms have prompted the development of trials on compounds that could tackle different neurotransmitter systems. Future approaches will encompass more personalized medicine strategies based on molecular signatures and non-motor phenotypes.
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Affiliation(s)
- Margherita Fabbri
- Clinical Investigation Center CIC1436, Department of Clinical Pharmacology and Neurosciences, Parkinson Expert Centre and NeuroToul Center of Excellence in Neurodegeneration (COEN) of Toulouse; INSERM, University of Toulouse 3, CHU of Toulouse , Toulouse, France
| | - Santiago Perez-Lloret
- Center for Health Sciences Research, National Research Council (ININCA-UAI-CONICET) , Buenos Aires, Argentina.,Department of Physiology, School of Medicine, University of Buenos Aires (UBA) , Buenos Aires, Argentina
| | - Olivier Rascol
- Clinical Investigation Center CIC1436, Department of Clinical Pharmacology and Neurosciences, Parkinson Expert Centre and NeuroToul Center of Excellence in Neurodegeneration (COEN) of Toulouse; INSERM, University of Toulouse 3, CHU of Toulouse , Toulouse, France
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de Germay S, Conte C, Rascol O, Montastruc JL, Lapeyre-Mestre M. β-Adrenoceptor Drugs and Parkinson's Disease: A Nationwide Nested Case-Control Study. CNS Drugs 2020; 34:763-772. [PMID: 32500347 DOI: 10.1007/s40263-020-00736-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Potential relationships between β-adrenergic drugs and α-synuclein synthesis in Parkinson's disease (PD) have been recently suggested. OBJECTIVE This study investigated the putative association between β-adrenoceptor drug exposure and PD occurrence. METHODS A nested case-control study was performed in the Echantillon Généraliste des Bénéficiaires (EGB) (a 1/97th random sample of affiliates to the French Insurance System). Incident PD patients diagnosed between 01/01/2008 and 31/12/2017 (index date) were matched 1:1 to controls by gender, birth year, and insurance scheme. Exposure to any β-agonist and to any β-antagonist was compared between cases and controls within 1-2 years before the index date, and exposure to salbutamol and to propranolol was individualized. The association between PD and β-adrenoceptor drugs was investigated through conditional logistic regression models adjusted for potential confounding factors. Because of a statistical interaction between β-agonists and diabetes, results were stratified according to the presence of diabetes. RESULTS Among the 2225 incident PD patients identified in the EGB (mean age 75.6 ± 10.2 years, sex ratio 1.04), no significant association was found between PD and β-antagonists (adjusted odds ratio [aOR] 1.05 [95% confidence interval 0.91-1.20]), except for propranolol (aOR 2.11 [1.38-3.23]). For β-agonists, a protective association in non-diabetic patients (aOR 0.75 [0.60-0.93]) and an opposite and significant association in diabetic patients (aOR 1.61 [1.02-2.55]) were observed. Similar results were found with salbutamol. CONCLUSION This study did not identify an increased risk of PD occurrence after β-antagonist exposure, except for propranolol (potential protopathic bias). The discordant results observed with β-agonists in patients with or without diabetes deserve further exploration of the influence of diabetic comorbidity on PD occurrence and evolution.
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Affiliation(s)
- Sibylle de Germay
- Service de Pharmacologie Médicale Et Clinique, Faculté de Médecine, Centre Hospitalier Universitaire, 37 allées Jules-Guesde, Toulouse, France.
- UMR 1027 INSERM Pharmacoépidémiologie, Université Paul Sabatier Toulouse III, Toulouse, France.
| | - Cécile Conte
- Service de Pharmacologie Médicale Et Clinique, Faculté de Médecine, Centre Hospitalier Universitaire, 37 allées Jules-Guesde, Toulouse, France
- UMR 1027 INSERM Pharmacoépidémiologie, Université Paul Sabatier Toulouse III, Toulouse, France
- CIC INSERM 1436, Paris, France
| | - Olivier Rascol
- Service de Pharmacologie Médicale Et Clinique, Faculté de Médecine, Centre Hospitalier Universitaire, 37 allées Jules-Guesde, Toulouse, France
- CIC INSERM 1436, Paris, France
- Réseau NS-PARK/FCRIN Et Centre COEN NeuroToul, Toulouse, France
| | - Jean-Louis Montastruc
- Service de Pharmacologie Médicale Et Clinique, Faculté de Médecine, Centre Hospitalier Universitaire, 37 allées Jules-Guesde, Toulouse, France
- UMR 1027 INSERM Pharmacoépidémiologie, Université Paul Sabatier Toulouse III, Toulouse, France
- Faculté de Médecine, Centre de PharmacoVigilance, Pharmacoépidémiologie Et D'Informations Sur Le Médicament, Centre Hospitalier Universitaire, Toulouse, France
- CIC INSERM 1436, Paris, France
- Réseau NS-PARK/FCRIN Et Centre COEN NeuroToul, Toulouse, France
| | - Maryse Lapeyre-Mestre
- Service de Pharmacologie Médicale Et Clinique, Faculté de Médecine, Centre Hospitalier Universitaire, 37 allées Jules-Guesde, Toulouse, France
- UMR 1027 INSERM Pharmacoépidémiologie, Université Paul Sabatier Toulouse III, Toulouse, France
- CIC INSERM 1436, Paris, France
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Olanow CW, Savolainen M, Chu Y, Halliday GM, Kordower JH. Temporal evolution of microglia and α-synuclein accumulation following foetal grafting in Parkinson's disease. Brain 2020; 142:1690-1700. [PMID: 31056668 DOI: 10.1093/brain/awz104] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 02/12/2019] [Accepted: 02/22/2019] [Indexed: 01/19/2023] Open
Abstract
We observed Lewy pathology in healthy embryonic dopamine neurons implanted into the striatum of patients with advanced Parkinson's disease. In the present study we examined the temporal relationship between the presence of inflammation with activated microglia and the emergence of α-synuclein pathology. Inflammation with activated microglia was observed in all grafts and at all time points examined between 18 months and 16 years as determined by both CD45 and TMEM119 staining. In contrast, α-synuclein was not detected at 18 months, only diffuse monomeric α-synuclein staining was observed at 4 years, and α-synuclein aggregates were not observed until 14-16 years after transplantation. Thus, there is evidence of inflammation and microglial activation in graft deposits long before the accumulation of α-synuclein pathology in implanted dopamine neurons. These observations raise the possibility that microglial activation contributes to the development of α-synuclein pathology, and supports the concept that microglia play an integral role in the propagation and spread of α-synuclein pathology.
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Affiliation(s)
- C Warren Olanow
- Department of Neurology and Department of Neuroscience, Mount Sinai School of Medicine, New York, NY, USA.,Clintrex Research Inc, Sarasota, Florida, USA
| | - Mari Savolainen
- Department of Neurological Sciences, Rush University Medical Center, Chicago Illinois, USA
| | - Yaping Chu
- Department of Neurological Sciences, Rush University Medical Center, Chicago Illinois, USA
| | - Glenda M Halliday
- Neuroscience Research Australia and Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia
| | - Jeffrey H Kordower
- Department of Neurological Sciences, Rush University Medical Center, Chicago Illinois, USA
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Abstract
Parkinson disease (PD) treatment options have conventionally focused on dopamine replacement and provision of symptomatic relief. Current treatments cause undesirable adverse effects, and a large unmet clinical need remains for treatments that offer disease modification and that address symptoms resistant to levodopa. Advances in high-throughput drug screening methods for small molecules, developments in disease modelling and improvements in analytical technologies have collectively contributed to the emergence of novel compounds, repurposed drugs and new technologies. In this Review, we focus on disease-modifying and symptomatic therapies under development for PD. We review cellular therapies and repurposed drugs, such as nilotinib, inosine, isradipine, iron chelators and anti-inflammatories, and discuss how their success in preclinical models has paved the way for clinical trials. We provide an update on immunotherapies and vaccines. In addition, we review non-pharmacological interventions targeting motor symptoms, including gene therapy, adaptive deep brain stimulation (DBS) and optogenetically inspired DBS. Given the many clinical phenotypes of PD, individualization of therapy and precision of treatment are likely to become important in the future.
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Katsaiti I, Nixon J. Are There Benefits in Adding Catechol-O Methyltransferase Inhibitors in the Pharmacotherapy of Parkinson's Disease Patients? A Systematic Review. JOURNAL OF PARKINSONS DISEASE 2019; 8:217-231. [PMID: 29614697 DOI: 10.3233/jpd-171225] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND A qualified consensus suggests that a combination of levodopa with a peripherally acting dopa decarboxylase inhibitor continues to present the gold standard treatment of Parkinson's disease (PD). However, as the disease progresses the therapeutic window of levodopa becomes narrowed. Pharmacological strategies for motor fluctuations are focused on providing less pulsatile and more continuous dopaminergic stimulation. Peripheral catechol-O-methyltransferase (COMT) inhibition improves the bioavailability of levodopa and results in a prolonged response. OBJECTIVE The primary aim of this study was to investigate the efficacy and safety of the two available COMT inhibitors; entacapone and tolcapone and the recently introduced opicapone. METHODS Electronic databases were systematically searched for original studies published within the last 37 years. In addition, lists of identified studies, reviews and their references were examined. RESULTS Twelve studies fulfilled the inclusion criteria. 3701 patients with PD were included in this systematic review. CONCLUSIONS Adjuvant treatment of PD patients experiencing motor fluctuations with entacapone resulted in improvement of motor function and was well tolerated. Therefore, entacapone presented an acceptable benefit to risk ratio. Tolcapone appeared to result in a greater therapeutic effect. However, this was not consistent across all motor variables and studies, and thus would not support its use, given the current onerous monitoring that is required. Opicapone was not associated with adverse reactions in a phase III trial but did not present a greater efficacy than entacapone, and thus further studies are required in order to illustrate its cost effectiveness.
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Affiliation(s)
- Irene Katsaiti
- Current Medical Student, Lancaster Medical School, Lancaster, UK
| | - John Nixon
- Consultant Neurologist, Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK
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Vollstedt EJ, Kasten M, Klein C. Using global team science to identify genetic parkinson's disease worldwide. Ann Neurol 2019; 86:153-157. [PMID: 31155756 DOI: 10.1002/ana.25514] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 12/21/2022]
Affiliation(s)
| | - Meike Kasten
- Institute of Neurogenetics and Department of Psychiatry, University of Lübeck, Lübeck, Germany
| | - Christine Klein
- Institute of Neurogenetics, University of Lübeck, Lübeck, Germany
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Abstract
PURPOSE OF REVIEW To review recent advances in therapeutics for motor and nonmotor symptoms of Parkinson's disease. RECENT FINDINGS Neuroprotection remains a large area of investigation with preliminary safety data on alpha synuclein immunotherapy and glucagon-like peptide-1 agonists. Novel Monoamine Oxidase B and Caetchol-O-methyltransferase-inhibitors for motor fluctuations have shown benefit and are recently approved for clinical use. Long-acting amantadine has also been approved to reduce dyskinesia. Alternative delivery strategies (sublingual, inhaled) dopaminergics may prove useful for rapid reversal of Parkinson's disease motor symptoms. Advanced therapies (surgery and infusional therapies) continue to be useful in subgroups of patients for motor complications with improved safety and also benefit on some nonmotor symptoms, including neuropsychiatric issues. Specific therapeutics for cognition, swallowing, sleep, and mood disorders had moderate to limited benefits. Exercise-based therapy appears beneficial at all stages of Parkinson's disease. SUMMARY The motor symptoms of Parkinson's disease can be reasonably treated and managed. However, therapies to slow or prevent disease progression remain a focus of research. Despite increased studies, treating nonmotor symptoms remains a challenge and an ongoing priority.
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Book A, Guella I, Candido T, Brice A, Hattori N, Jeon B, Farrer MJ. A Meta-Analysis of α-Synuclein Multiplication in Familial Parkinsonism. Front Neurol 2018; 9:1021. [PMID: 30619023 PMCID: PMC6297377 DOI: 10.3389/fneur.2018.01021] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 11/13/2018] [Indexed: 11/18/2022] Open
Abstract
Chronic alpha-synuclein (SNCA) overexpression is a relatively homogenous and well-defined cause of parkinsonism and dementia. Parkinson's disease (PD), PD with dementia, dementia with Lewy bodies and multiple system atrophy all manifest in SNCA multiplication families. Herein we summarize genealogic, clinical and genetic data from 59 families (25 not previously published) with parkinsonism caused by SNCA multiplications. Longitudinal clinical assessments and genealogic relationships were documented for all family members. All probands were genotyped with an Illumina MEGA high-density genotyping array to identify copy number variants (CNV) and enable SNCA multiplication breakpoints to be defined. Three SNCA short tandem repeat (STR) markers were genotyped in all available samples to validate genomic dosage and inheritance. A web-application was built as a forum for future data sharing. CNV analysis identified 49 subjects with heterozygous SNCA duplication (CNV3), 2 with homozygous duplication (CNV4) and 7 with a triplication mutation (CNV4). Clinical presentations varied greatly throughout the cohort. SNCA dosage correlates with disease onset (mean age of onset CNV3: 46.9 ± 10.5 years vs. 34.5 ± 7.4 CNV4, p = 0.003). Atypical or more severe clinical courses were described in several patients and dementia was noted in 50.9% of the probands. Neither the multiplication size (average 2.05 ± 2.45 Mb) nor the number of genes included (range 1-50) was associated with motor symptom onset or dementia. Families with SNCA multiplication are rare and globally-distributed. Nevertheless, they may both inform and benefit from the development of SNCA targeted therapeutic strategies relevant to the treatment of all alpha-synucleinopathies.
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Affiliation(s)
- Adam Book
- Department of Medical Genetics, Centre for Applied Neurogenetics, University of British Columbia, Vancouver, BC, Canada
| | - Ilaria Guella
- Department of Medical Genetics, Centre for Applied Neurogenetics, University of British Columbia, Vancouver, BC, Canada
| | - Tara Candido
- Department of Medical Genetics, Centre for Applied Neurogenetics, University of British Columbia, Vancouver, BC, Canada
| | - Alexis Brice
- Sorbonne Universités, Université Pierre-et-Marie Curie (UPMC) Paris, UM 1127, Institut du Cerveau et de la Moelle Epinière (ICM) and Département de Génétique, Hôpital Pitié-Salpêtrière, Paris, France
| | - Nobutaka Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - Beomseok Jeon
- Department of Neurology, Seoul National University Hospital, Seoul, South Korea
| | - Matthew J. Farrer
- Department of Medical Genetics, Centre for Applied Neurogenetics, University of British Columbia, Vancouver, BC, Canada
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14
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Charvin D, Medori R, Hauser RA, Rascol O. Therapeutic strategies for Parkinson disease: beyond dopaminergic drugs. Nat Rev Drug Discov 2018; 17:804-822. [PMID: 30262889 DOI: 10.1038/nrd.2018.136] [Citation(s) in RCA: 144] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Existing therapeutic strategies for managing Parkinson disease (PD), which focus on addressing the loss of dopamine and dopaminergic function linked with degeneration of dopaminergic neurons, are limited by side effects and lack of long-term efficacy. In recent decades, research into PD pathophysiology and pharmacology has focused on understanding and tackling the neurodegenerative processes and symptomology of PD. In this Review, we discuss the challenges associated with the development of novel therapies for PD, highlighting emerging agents that aim to target cell death, as well as new targets offering a symptomatic approach to managing features and progression of the disease.
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Affiliation(s)
| | | | - Robert A Hauser
- Department of Neurology, University of South Florida, Tampa, FL, USA
| | - Olivier Rascol
- Centre d'Investigation Clinique CIC1436, Services de Neurologie et de Pharmacologie Clinique, Réseau NS-PARK/FCRIN et Centre COEN NeuroToul, CHU de Toulouse, INSERM, University of Toulouse 3, Toulouse, France
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15
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Pihlstrøm L, Blauwendraat C, Cappelletti C, Berge-Seidl V, Langmyhr M, Henriksen SP, van de Berg WDJ, Gibbs JR, Cookson MR, Singleton AB, Nalls MA, Toft M. A comprehensive analysis of SNCA-related genetic risk in sporadic parkinson disease. Ann Neurol 2018; 84:117-129. [PMID: 30146727 DOI: 10.1002/ana.25274] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 04/13/2018] [Accepted: 06/15/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The goal of this study was to refine our understanding of disease risk attributable to common genetic variation in SNCA, a major locus in Parkinson disease, with potential implications for clinical trials targeting α-synuclein. We aimed to dissect the multiple independent association signals, stratify individuals by SNCA-specific risk profiles, and explore expression quantitative trait loci. METHODS We analyzed participant-level data from 12,503 patients and 12,502 controls, optimizing a risk model and assessing SNCA-specific risk scores and haplotypes as predictors of individual risk. We also explored hypotheses about functional mechanisms and correlated risk variants to gene expression in human brain and protein levels in cerebrospinal fluid. RESULTS We report and replicate a novel, third independent association signal at genome-wide significance level downstream of SNCA (rs2870004, p = 3.0*10-8 , odds ratio [OR] = 0.88, 95% confidence interval [CI] = 0.84-0.92). SNCA risk score stratification showed a 2-fold difference in disease susceptibility between top and bottom quintiles (OR = 1.99, 95% CI = 1.78-2.23). Contrary to previous reports, we provide evidence supporting top variant rs356182 as functional in itself and associated with a specific SNCA 5' untranslated region transcript isoform in frontal cortex. INTERPRETATION The SNCA locus harbors a minimum of 3 independent association signals for Parkinson disease. We demonstrate a fine-grained stratification of α-synuclein-related genetic burden in individual patients of potential future clinical relevance. Further efforts to pinpoint the functional mechanisms are warranted, including studies of the likely causal top variant rs356182 and its role in regulating levels of specific SNCA mRNA transcript variants. Ann Neurol 2018;83:117-129.
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Affiliation(s)
- Lasse Pihlstrøm
- Department of Neurology, Oslo University Hospital, Oslo, Norway
| | - Cornelis Blauwendraat
- Neurodegenerative Diseases Research Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD.,Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD
| | | | | | | | | | - Wilma D J van de Berg
- Department of Anatomy and Neurosciences, Clinical Neuroanatomy Section, Amsterdam Neuroscience, VU Medical Center, Amsterdam, the Netherlands
| | - J Raphael Gibbs
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD
| | - Mark R Cookson
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD
| | | | | | - Andrew B Singleton
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD
| | - Mike A Nalls
- Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD.,Data Tecnica International, Glen Echo, MD
| | - Mathias Toft
- Department of Neurology, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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16
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Soluble epoxide hydrolase plays a key role in the pathogenesis of Parkinson's disease. Proc Natl Acad Sci U S A 2018; 115:E5815-E5823. [PMID: 29735655 DOI: 10.1073/pnas.1802179115] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Parkinson's disease (PD) is characterized as a chronic and progressive neurodegenerative disorder, and the deposition of specific protein aggregates of α-synuclein, termed Lewy bodies, is evident in multiple brain regions of PD patients. Although there are several available medications to treat PD symptoms, these medications do not prevent the progression of the disease. Soluble epoxide hydrolase (sEH) plays a key role in inflammation associated with the pathogenesis of PD. Here we found that MPTP (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine)-induced neurotoxicity in the mouse striatum was attenuated by subsequent repeated administration of TPPU, a potent sEH inhibitor. Furthermore, deletion of the sEH gene protected against MPTP-induced neurotoxicity, while overexpression of sEH in the striatum significantly enhanced MPTP-induced neurotoxicity. Moreover, the expression of the sEH protein in the striatum from MPTP-treated mice or postmortem brain samples from patients with dementia of Lewy bodies (DLB) was significantly higher compared with control groups. Interestingly, there was a positive correlation between sEH expression and phosphorylation of α-synuclein in the striatum. Oxylipin analysis showed decreased levels of 8,9-epoxy-5Z,11Z,14Z-eicosatrienoic acid in the striatum of MPTP-treated mice, suggesting increased activity of sEH in this region. Interestingly, the expression of sEH mRNA in human PARK2 iPSC-derived neurons was higher than that of healthy control. Treatment with TPPU protected against apoptosis in human PARK2 iPSC-derived dopaminergic neurons. These findings suggest that increased activity of sEH in the striatum plays a key role in the pathogenesis of neurodegenerative disorders such as PD and DLB. Therefore, sEH may represent a promising therapeutic target for α-synuclein-related neurodegenerative disorders.
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17
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Lang AE, Espay AJ. Disease Modification in Parkinson's Disease: Current Approaches, Challenges, and Future Considerations. Mov Disord 2018; 33:660-677. [DOI: 10.1002/mds.27360] [Citation(s) in RCA: 203] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 02/04/2018] [Accepted: 02/07/2018] [Indexed: 12/13/2022] Open
Affiliation(s)
- Anthony E. Lang
- Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, UHN, Division of Neurology; University of Toronto; Toronto Ontario Canada
| | - Alberto J. Espay
- UC Gardner Neuroscience Institute and Gardner Family Center for Parkinson's Disease and Movement Disorders, Department of Neurology; University of Cincinnati; Cincinnati Ohio USA
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18
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Zhang J, Culp ML, Craver JG, Darley-Usmar V. Mitochondrial function and autophagy: integrating proteotoxic, redox, and metabolic stress in Parkinson's disease. J Neurochem 2018; 144:691-709. [PMID: 29341130 PMCID: PMC5897151 DOI: 10.1111/jnc.14308] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/04/2018] [Accepted: 01/09/2018] [Indexed: 12/14/2022]
Abstract
Parkinson's disease (PD) is a movement disorder with widespread neurodegeneration in the brain. Significant oxidative, reductive, metabolic, and proteotoxic alterations have been observed in PD postmortem brains. The alterations of mitochondrial function resulting in decreased bioenergetic health is important and needs to be further examined to help develop biomarkers for PD severity and prognosis. It is now becoming clear that multiple hits on metabolic and signaling pathways are likely to exacerbate PD pathogenesis. Indeed, data obtained from genetic and genome association studies have implicated interactive contributions of genes controlling protein quality control and metabolism. For example, loss of key proteins that are responsible for clearance of dysfunctional mitochondria through a process called mitophagy has been found to cause PD, and a significant proportion of genes associated with PD encode proteins involved in the autophagy-lysosomal pathway. In this review, we highlight the evidence for the targeting of mitochondria by proteotoxic, redox and metabolic stress, and the role autophagic surveillance in maintenance of mitochondrial quality. Furthermore, we summarize the role of α-synuclein, leucine-rich repeat kinase 2, and tau in modulating mitochondrial function and autophagy. Among the stressors that can overwhelm the mitochondrial quality control mechanisms, we will discuss 4-hydroxynonenal and nitric oxide. The impact of autophagy is context depend and as such can have both beneficial and detrimental effects. Furthermore, we highlight the potential of targeting mitochondria and autophagic function as an integrated therapeutic strategy and the emerging contribution of the microbiome to PD susceptibility.
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Affiliation(s)
- Jianhua Zhang
- Center for Free Radical Biology, University of Alabama at Birmingham
- Department of Pathology, University of Alabama at Birmingham
- Department of Veterans Affairs, Birmingham VA Medical Center
| | - M Lillian Culp
- Center for Free Radical Biology, University of Alabama at Birmingham
- Department of Pathology, University of Alabama at Birmingham
| | - Jason G Craver
- Center for Free Radical Biology, University of Alabama at Birmingham
- Department of Pathology, University of Alabama at Birmingham
| | - Victor Darley-Usmar
- Center for Free Radical Biology, University of Alabama at Birmingham
- Department of Pathology, University of Alabama at Birmingham
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19
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Obeso J, Stamelou M, Goetz C, Poewe W, Lang A, Weintraub D, Burn D, Halliday G, Bezard E, Przedborski S, Lehericy S, Brooks D, Rothwell J, Hallett M, DeLong M, Marras C, Tanner C, Ross G, Langston J, Klein C, Bonifati V, Jankovic J, Lozano A, Deuschl G, Bergman H, Tolosa E, Rodriguez-Violante M, Fahn S, Postuma R, Berg D, Marek K, Standaert D, Surmeier D, Olanow C, Kordower J, Calabresi P, Schapira A, Stoessl A. Past, present, and future of Parkinson's disease: A special essay on the 200th Anniversary of the Shaking Palsy. Mov Disord 2017; 32:1264-1310. [PMID: 28887905 PMCID: PMC5685546 DOI: 10.1002/mds.27115] [Citation(s) in RCA: 481] [Impact Index Per Article: 68.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 06/27/2017] [Indexed: 12/12/2022] Open
Abstract
This article reviews and summarizes 200 years of Parkinson's disease. It comprises a relevant history of Dr. James Parkinson's himself and what he described accurately and what he missed from today's perspective. Parkinson's disease today is understood as a multietiological condition with uncertain etiopathogenesis. Many advances have occurred regarding pathophysiology and symptomatic treatments, but critically important issues are still pending resolution. Among the latter, the need to modify disease progression is undoubtedly a priority. In sum, this multiple-author article, prepared to commemorate the bicentenary of the shaking palsy, provides a historical state-of-the-art account of what has been achieved, the current situation, and how to progress toward resolving Parkinson's disease. © 2017 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- J.A. Obeso
- HM CINAC, Hospital Universitario HM Puerta del Sur, Mostoles, Madrid, Spain
- Universidad CEU San Pablo, Madrid, Spain
- CIBERNED, Madrid, Spain
| | - M. Stamelou
- Department of Neurology, Philipps University, Marburg, Germany
- Parkinson’s Disease and Movement Disorders Department, HYGEIA Hospital and Attikon Hospital, University of Athens, Athens, Greece
| | - C.G. Goetz
- Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA
| | - W. Poewe
- Department of Neurology, Medical University Innsbruck, Innsbruck, Austria
| | - A.E. Lang
- Morton and Gloria Shulman Movement Disorders Clinic and the Edmond J Safra Program in Parkinson’s Disease, Toronto Western Hospital, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | - D. Weintraub
- Department of Psychiatry, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania, USA
- Parkinson’s Disease and Mental Illness Research, Education and Clinical Centers (PADRECC and MIRECC), Corporal Michael J. Crescenz Veteran’s Affairs Medical Center, Philadelphia, Pennsylvania, USA
| | - D. Burn
- Medical Sciences, Newcastle University, Newcastle, UK
| | - G.M. Halliday
- Brain and Mind Centre, Sydney Medical School, The University of Sydney, Sydney, Australia
- School of Medical Sciences, University of New South Wales and Neuroscience Research Australia, Sydney, Australia
| | - E. Bezard
- Université de Bordeaux, Institut des Maladies Neurodégénératives, Centre National de la Recherche Scientifique Unité Mixte de Recherche 5293, Institut des Maladies Neurodégénératives, Bordeaux, France
- China Academy of Medical Sciences, Institute of Lab Animal Sciences, Beijing, China
| | - S. Przedborski
- Departments of Neurology, Pathology, and Cell Biology, the Center for Motor Neuron Biology and Disease, Columbia University, New York, New York, USA
- Columbia Translational Neuroscience Initiative, Columbia University, New York, New York, USA
| | - S. Lehericy
- Institut du Cerveau et de la Moelle épinière – ICM, Centre de NeuroImagerie de Recherche – CENIR, Sorbonne Universités, UPMC Univ Paris 06, Inserm U1127, CNRS UMR 7225, Paris, France
- Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - D.J. Brooks
- Clinical Sciences Department, Newcastle University, Newcastle, UK
- Department of Nuclear Medicine, Aarhus University, Aarhus, Denmark
| | - J.C. Rothwell
- Human Neurophysiology, Sobell Department, UCL Institute of Neurology, London, UK
| | - M. Hallett
- Human Motor Control Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, USA
| | - M.R. DeLong
- Department of Neurology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - C. Marras
- Morton and Gloria Shulman Movement Disorders Centre and the Edmond J Safra Program in Parkinson’s disease, Toronto Western Hospital, University of Toronto, Toronto, Canada
| | - C.M. Tanner
- Movement Disorders and Neuromodulation Center, Department of Neurology, University of California–San Francisco, San Francisco, California, USA
- Parkinson’s Disease Research, Education and Clinical Center, San Francisco Veterans Affairs Medical Center, San Francisco, California, USA
| | - G.W. Ross
- Veterans Affairs Pacific Islands Health Care System, Honolulu, Hawaii, USA
| | | | - C. Klein
- Institute of Neurogenetics, University of Luebeck, Luebeck, Germany
| | - V. Bonifati
- Department of Clinical Genetics, Erasmus University Medical Center, Rotterdam, The Netherlands
| | - J. Jankovic
- Parkinson’s Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, Texas, USA
| | - A.M. Lozano
- Department of Neurosurgery, Toronto Western Hospital, University of Toronto, Toronto, Canada
| | - G. Deuschl
- Department of Neurology, Universitätsklinikum Schleswig-Holstein, Christian Albrechts University Kiel, Kiel, Germany
| | - H. Bergman
- Department of Medical Neurobiology, Institute of Medical Research Israel-Canada, Jerusalem, Israel
- Edmond and Lily Safra Center for Brain Sciences, The Hebrew University, Jerusalem, Israel
- Department of Neurosurgery, Hadassah University Hospital, Jerusalem, Israel
| | - E. Tolosa
- Parkinson’s Disease and Movement Disorders Unit, Neurology Service, Institut Clínic de Neurociències, Hospital Clínic de Barcelona, Barcelona, Spain
- Department of Medicine, Universitat de Barcelona, IDIBAPS, Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - M. Rodriguez-Violante
- Movement Disorders Clinic, Clinical Neurodegenerative Research Unit, Mexico City, Mexico
- Instituto Nacional de Neurología y Neurocirugía, Mexico City, Mexico
| | - S. Fahn
- Department of Neurology, Columbia University Medical Center, New York, New York, USA
| | - R.B. Postuma
- Department of Neurology, McGill University, Montreal General Hospital, Montreal, Quebec, Canada
| | - D. Berg
- Klinikfür Neurologie, UKSH, Campus Kiel, Christian-Albrechts-Universität, Kiel, Germany
| | - K. Marek
- Institute for Neurodegenerative Disorders, New Haven, Connecticut, USA
| | - D.G. Standaert
- Department of Neurology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - D.J. Surmeier
- Department of Physiology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - C.W. Olanow
- Departments of Neurology and Neuroscience, Mount Sinai School of Medicine, New York, New York, USA
| | - J.H. Kordower
- Research Center for Brain Repair, Rush University Medical Center, Chicago, Illinois, USA
- Neuroscience Graduate Program, Rush University Medical Center, Chicago, Illinois, USA
| | - P. Calabresi
- Neurological Clinic, Department of Medicine, Hospital Santa Maria della Misericordia, University of Perugia, Perugia, Italy
- Laboratory of Neurophysiology, Santa Lucia Foundation, IRCCS, Rome, Italy
| | - A.H.V. Schapira
- University Department of Clinical Neurosciences, UCL Institute of Neurology, University College London, London, UK
| | - A.J. Stoessl
- Pacific Parkinson’s Research Centre, Division of Neurology & Djavadf Mowafaghian Centre for Brain Health, University of British Columbia, British Columbia, Canada
- Vancouver Coastal Health, Vancouver, British Columbia, Canada
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