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Moors TE, Morella ML, Bertran-Cobo C, Geut H, Udayar V, Timmermans-Huisman E, Ingrassia AMT, Brevé JJP, Bol JGJM, Bonifati V, Jagasia R, van de Berg WDJ. Altered TFEB subcellular localization in nigral neurons of subjects with incidental, sporadic and GBA-related Lewy body diseases. Acta Neuropathol 2024; 147:67. [PMID: 38581586 PMCID: PMC10998821 DOI: 10.1007/s00401-024-02707-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 02/14/2024] [Accepted: 02/14/2024] [Indexed: 04/08/2024]
Abstract
Transcription factor EB (TFEB) is a master regulator of genes involved in the maintenance of autophagic and lysosomal homeostasis, processes which have been implicated in the pathogenesis of GBA-related and sporadic Parkinson's disease (PD), and dementia with Lewy bodies (DLB). TFEB activation results in its translocation from the cytosol to the nucleus. Here, we investigated TFEB subcellular localization and its relation to intracellular alpha-synuclein (aSyn) accumulation in post-mortem human brain of individuals with either incidental Lewy body disease (iLBD), GBA-related PD/DLB (GBA-PD/DLB) or sporadic PD/DLB (sPD/DLB), compared to control subjects. We analyzed nigral dopaminergic neurons using high-resolution confocal and stimulated emission depletion (STED) microscopy and semi-quantitatively scored the TFEB subcellular localization patterns. We observed reduced nuclear TFEB immunoreactivity in PD/DLB patients compared to controls, both in sporadic and GBA-related cases, as well as in iLBD cases. Nuclear depletion of TFEB was more pronounced in neurons with Ser129-phosphorylated (pSer129) aSyn accumulation in all groups. Importantly, we observed previously-unidentified TFEB-immunopositive perinuclear clusters in human dopaminergic neurons, which localized at the Golgi apparatus. These TFEB clusters were more frequently observed and more severe in iLBD, sPD/DLB and GBA-PD/DLB compared to controls, particularly in pSer129 aSyn-positive neurons, but also in neurons lacking detectable aSyn accumulation. In aSyn-negative cells, cytoplasmic TFEB clusters were more frequently observed in GBA-PD/DLB and iLBD patients, and correlated with reduced GBA enzymatic activity as well as increased Braak LB stage. Altered TFEB distribution was accompanied by a reduction in overall mRNA expression levels of selected TFEB-regulated genes, indicating a possible early dysfunction of lysosomal regulation. Overall, we observed cytoplasmic TFEB retention and accumulation at the Golgi in cells without apparent pSer129 aSyn accumulation in iLBD and PD/DLB patients. This suggests potential TFEB impairment at the early stages of cellular disease and underscores TFEB as a promising therapeutic target for synucleinopathies.
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Affiliation(s)
- Tim E Moors
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Martino L Morella
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Cesc Bertran-Cobo
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Hanneke Geut
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Vinod Udayar
- Roche Pharma Research and Early Development; Neuroscience and Rare Diseases Discovery and Translational Area, Roche Innovation Center, Basel, Switzerland
| | - Evelien Timmermans-Huisman
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Angela M T Ingrassia
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - John J P Brevé
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - John G J M Bol
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands
| | - Vincenzo Bonifati
- Erasmus MC, Department of Clinical Genetics, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Ravi Jagasia
- Roche Pharma Research and Early Development; Neuroscience and Rare Diseases Discovery and Translational Area, Roche Innovation Center, Basel, Switzerland
| | - Wilma D J van de Berg
- Section Clinical Neuroanatomy and Biobanking, Department of Anatomy and Neurosciences, Amsterdam UMC, Vrije University, Amsterdam, The Netherlands.
- Amsterdam Neuroscience, Program Neurodegeneration, Amsterdam, The Netherlands.
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O’Day DH. The Complex Interplay between Toxic Hallmark Proteins, Calmodulin-Binding Proteins, Ion Channels, and Receptors Involved in Calcium Dyshomeostasis in Neurodegeneration. Biomolecules 2024; 14:173. [PMID: 38397410 PMCID: PMC10886625 DOI: 10.3390/biom14020173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 02/25/2024] Open
Abstract
Calcium dyshomeostasis is an early critical event in neurodegeneration as exemplified by Alzheimer's (AD), Huntington's (HD) and Parkinson's (PD) diseases. Neuronal calcium homeostasis is maintained by a diversity of ion channels, buffers, calcium-binding protein effectors, and intracellular storage in the endoplasmic reticulum, mitochondria, and lysosomes. The function of these components and compartments is impacted by the toxic hallmark proteins of AD (amyloid beta and Tau), HD (huntingtin) and PD (alpha-synuclein) as well as by interactions with downstream calcium-binding proteins, especially calmodulin. Each of the toxic hallmark proteins (amyloid beta, Tau, huntingtin, and alpha-synuclein) binds to calmodulin. Multiple channels and receptors involved in calcium homeostasis and dysregulation also bind to and are regulated by calmodulin. The primary goal of this review is to show the complexity of these interactions and how they can impact research and the search for therapies. A secondary goal is to suggest that therapeutic targets downstream from calcium dyshomeostasis may offer greater opportunities for success.
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Affiliation(s)
- Danton H. O’Day
- Department of Biology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada;
- Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
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3
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O’Day DH. Protein Biomarkers Shared by Multiple Neurodegenerative Diseases Are Calmodulin-Binding Proteins Offering Novel and Potentially Universal Therapeutic Targets. J Clin Med 2023; 12:7045. [PMID: 38002659 PMCID: PMC10672630 DOI: 10.3390/jcm12227045] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/06/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023] Open
Abstract
Seven major neurodegenerative diseases and their variants share many overlapping biomarkers that are calmodulin-binding proteins: Alzheimer's disease (AD), amyotrophic lateral sclerosis (ALS), frontotemporal lobar dementia (FTD), Huntington's disease (HD), Lewy body disease (LBD), multiple sclerosis (MS), and Parkinson's disease (PD). Calcium dysregulation is an early and persistent event in each of these diseases, with calmodulin serving as an initial and primary target of increased cytosolic calcium. Considering the central role of calcium dysregulation and its downstream impact on calcium signaling, calmodulin has gained interest as a major regulator of neurodegenerative events. Here, we show that calmodulin serves a critical role in neurodegenerative diseases via binding to and regulating an abundance of biomarkers, many of which are involved in multiple neurodegenerative diseases. Of special interest are the shared functions of calmodulin in the generation of protein biomarker aggregates in AD, HD, LBD, and PD, where calmodulin not only binds to amyloid beta, pTau, alpha-synuclein, and mutant huntingtin but also, via its regulation of transglutaminase 2, converts them into toxic protein aggregates. It is suggested that several calmodulin binding proteins could immediately serve as primary drug targets, while combinations of calmodulin binding proteins could provide simultaneous insight into the onset and progression of multiple neurodegenerative diseases.
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Affiliation(s)
- Danton H. O’Day
- Department of Biology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada;
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
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4
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Piovesana E, Magrin C, Ciccaldo M, Sola M, Bellotto M, Molinari M, Papin S, Paganetti P. Tau accumulation in degradative organelles is associated to lysosomal stress. Sci Rep 2023; 13:18024. [PMID: 37865674 PMCID: PMC10590387 DOI: 10.1038/s41598-023-44979-7] [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: 05/23/2023] [Accepted: 10/14/2023] [Indexed: 10/23/2023] Open
Abstract
Neurodegenerative disorders are characterized by the brain deposition of insoluble amyloidogenic proteins, such as α-synuclein or Tau, and the concomitant deterioration of cell functions such as the autophagy-lysosomal pathway (ALP). The ALP is involved in the degradation of intracellular macromolecules including protein aggregates. ALP dysfunction due to inherited defects in lysosomal or non-lysosomal proteins causes a group of diseases called lysosomal storage disorders (LSD) because of abnormal accumulation of lysosomal degradation substrates. Supporting the contribution of ALP defects in neurodegenerative diseases, deposition of amyloidogenic proteins occurs in LSD. Moreover, heterozygous mutations of several ALP genes represent risk factors for Parkinson's disease. The reciprocal contribution of α-synuclein accumulation and lysosomal dysfunction have been extensively studied. However, whether this adverse crosstalk also embraces Tau pathology needs more investigation. Here, we show in human primary fibroblasts that Tau seeds isolated from the brain of Alzheimer's disease induce Tau accumulation in acidic degradative organelles and lysosomal stress. Furthermore, inhibition of glucocerebrosidase, a lysosomal enzyme mutated in Gaucher's disease and a main risk for Parkinson's disease, causes lysosomal dysfunction in primary fibroblasts and contributes to the accumulation of Tau. Considering the presence of Tau lesions in Parkinson's disease as well as in multiple neurodegenerative disorders including Alzheimer's disease, our data call for further studies on strategies to alleviate ALP dysfunction as new therapeutic opportunity for neurodegenerative diseases and LSD.
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Affiliation(s)
- Ester Piovesana
- Laboratory for Aging Disorders, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
- PhD Program in Neurosciences, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland
| | - Claudia Magrin
- Laboratory for Aging Disorders, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
- PhD Program in Neurosciences, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland
| | - Matteo Ciccaldo
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera italiana, Bellinzona, Switzerland
| | - Martina Sola
- Laboratory for Aging Disorders, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
- PhD Program in Neurosciences, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland
| | | | - Maurizio Molinari
- Institute for Research in Biomedicine, Faculty of Biomedical Sciences, Università della Svizzera italiana, Bellinzona, Switzerland
- School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Stéphanie Papin
- Laboratory for Aging Disorders, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland
| | - Paolo Paganetti
- Laboratory for Aging Disorders, Laboratories for Translational Research, Ente Ospedaliero Cantonale, Bellinzona, Switzerland.
- PhD Program in Neurosciences, Faculty of Biomedical Sciences, Università della Svizzera Italiana, Lugano, Switzerland.
- Neurocentro della Svizzera Italiana, Ente Ospedaliero Cantonale, Lugano, Switzerland.
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Keefe AJ, Gabrych DR, Zhu Y, Vocadlo DJ, Silverman MA. Axonal Transport of Lysosomes Is Unaffected in Glucocerebrosidase-Inhibited iPSC-Derived Forebrain Neurons. eNeuro 2023; 10:ENEURO.0079-23.2023. [PMID: 37816595 PMCID: PMC10576257 DOI: 10.1523/eneuro.0079-23.2023] [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: 02/22/2023] [Revised: 09/18/2023] [Accepted: 09/20/2023] [Indexed: 10/12/2023] Open
Abstract
Lysosomes are acidic organelles that traffic throughout neurons delivering catabolic enzymes to distal regions of the cell and maintaining degradative demands. Loss of function mutations in the gene GBA encoding the lysosomal enzyme glucocerebrosidase (GCase) cause the lysosomal storage disorder Gaucher's disease (GD) and are the most common genetic risk factor for synucleinopathies like Parkinson's disease (PD) and dementia with Lewy bodies (DLB). GCase degrades the membrane lipid glucosylceramide (GlcCer) and mutations in GBA, or inhibiting its activity, results in the accumulation of GlcCer and disturbs the composition of the lysosomal membrane. The lysosomal membrane serves as the platform to which intracellular trafficking complexes are recruited and activated. Here, we investigated whether lysosomal trafficking in axons was altered by inhibition of GCase with the pharmacological agent Conduritol B Epoxide (CBE). Using live cell imaging in human male induced pluripotent human stem cell (iPSC)-derived forebrain neurons, we demonstrated that lysosomal transport was similar in both control and CBE-treated neurons. Furthermore, we tested whether lysosomal rupture, a process implicated in various neurodegenerative disorders, was affected by inhibition of GCase. Using L-leucyl-L-leucine methyl ester (LLoME) to induce lysosomal membrane damage and immunocytochemical staining for markers of lysosomal rupture, we found no difference in susceptibility to rupture between control and CBE-treated neurons. These results suggest the loss of GCase activity does not contribute to neurodegenerative disease by disrupting either lysosomal transport or rupture.
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Affiliation(s)
- A J Keefe
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - D R Gabrych
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - Y Zhu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - D J Vocadlo
- Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - M A Silverman
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
- Centre for Cell Biology, Development, and Disease, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
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6
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Chatterjee D, Krainc D. Mechanisms of Glucocerebrosidase Dysfunction in Parkinson's Disease. J Mol Biol 2023; 435:168023. [PMID: 36828270 PMCID: PMC10247409 DOI: 10.1016/j.jmb.2023.168023] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023]
Abstract
Beta-glucocerebrosidase is a lysosomal hydrolase, encoded by GBA1 that represents the most common risk gene associated with Parkinson's disease (PD) and Lewy Body Dementia. Glucocerebrosidase dysfunction has been also observed in the absence of GBA1 mutations across different genetic and sporadic forms of PD and related disorders, suggesting a broader role of glucocerebrosidase in neurodegeneration. In this review, we highlight recent advances in mechanistic characterization of glucocerebrosidase function as the foundation for development of novel therapeutics targeting glucocerebrosidase in PD and related disorders.
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Affiliation(s)
- Diptaman Chatterjee
- Ken and Ruth Davee Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA. https://twitter.com/NeilChatterBox
| | - Dimitri Krainc
- Ken and Ruth Davee Department of Neurology, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA; Simpson Querrey Center for Neurogenetics, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA.
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7
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Smith LJ, Bolsinger MM, Chau KY, Gegg ME, Schapira AHV. The GBA variant E326K is associated with alpha-synuclein aggregation and lipid droplet accumulation in human cell lines. Hum Mol Genet 2023; 32:773-789. [PMID: 36130205 PMCID: PMC9941838 DOI: 10.1093/hmg/ddac233] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 08/25/2022] [Accepted: 09/09/2022] [Indexed: 11/14/2022] Open
Abstract
Sequence variants or mutations in the GBA gene are numerically the most important risk factor for Parkinson disease (PD). The GBA gene encodes for the lysosomal hydrolase enzyme, glucocerebrosidase (GCase). GBA mutations often reduce GCase activity and lead to the impairment of the autophagy-lysosomal pathway, which is important in the turnover of alpha-synuclein, accumulation of which is a key pathological hallmark of PD. Although the E326K variant is one of the most common GBA variants associated with PD, there is limited understanding of its biochemical effects. We have characterized homozygous and heterozygous E326K variants in human fibroblasts. We found that E326K variants did not cause a significant loss of GCase protein or activity, endoplasmic reticulum (ER) retention or ER stress, in contrast to the L444P GBA mutation. This was confirmed in human dopaminergic SH-SY5Y neuroblastoma cell lines overexpressing GCase with either E326K or L444P protein. Despite no loss of the GCase activity, a significant increase in insoluble alpha-synuclein aggregates in E326K and L444P mutants was observed. Notably, SH-SY5Y overexpressing E326K demonstrated a significant increase in the lipid droplet number under basal conditions, which was exacerbated following treatment with the fatty acid oleic acid. Similarly, a significant increase in lipid droplet formation following lipid loading was observed in heterozygous and homozygous E326K fibroblasts. In conclusion, the work presented here demonstrates that the E326K mutation behaves differently to the common loss of function GBA mutations; however, lipid dyshomeostasis and alpha-synuclein pathology are still evident.
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Affiliation(s)
- Laura J Smith
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, Royal Free Campus, London NW3 2PF, UK
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Magdalena M Bolsinger
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, Royal Free Campus, London NW3 2PF, UK
- Division of Medicine, Friedrich-Alexander University Erlangen-Nurnberg, Schloßplatz 4, 91054 Erlangen, Germany
| | - Kai-Yin Chau
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, Royal Free Campus, London NW3 2PF, UK
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Matthew E Gegg
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, Royal Free Campus, London NW3 2PF, UK
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Anthony H V Schapira
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, Royal Free Campus, London NW3 2PF, UK
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
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GBA1 Gene Mutations in α-Synucleinopathies-Molecular Mechanisms Underlying Pathology and Their Clinical Significance. Int J Mol Sci 2023; 24:ijms24032044. [PMID: 36768367 PMCID: PMC9917178 DOI: 10.3390/ijms24032044] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/22/2023] Open
Abstract
α-Synucleinopathies comprise a group of neurodegenerative diseases characterized by altered accumulation of a protein called α-synuclein inside neurons and glial cells. This aggregation leads to the formation of intraneuronal inclusions, Lewy bodies, that constitute the hallmark of α-synuclein pathology. The most prevalent α-synucleinopathies are Parkinson's disease (PD), dementia with Lewy bodies (DLB), and multiple system atrophy (MSA). To date, only symptomatic treatment is available for these disorders, hence new approaches to their therapy are needed. It has been observed that GBA1 mutations are one of the most impactful risk factors for developing α-synucleinopathies such as PD and DLB. Mutations in the GBA1 gene, which encodes a lysosomal hydrolase β-glucocerebrosidase (GCase), cause a reduction in GCase activity and impaired α-synuclein metabolism. The most abundant GBA1 gene mutations are N370S or N409S, L444P/L483P and E326K/E365K. The mechanisms by which GCase impacts α-synuclein aggregation are poorly understood and need to be further investigated. Here, we discuss some of the potential interactions between α-synuclein and GCase and show how GBA1 mutations may impact the course of the most prevalent α-synucleinopathies.
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9
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The Consequences of GBA Deficiency in the Autophagy-Lysosome System in Parkinson's Disease Associated with GBA. Cells 2023; 12:cells12010191. [PMID: 36611984 PMCID: PMC9818455 DOI: 10.3390/cells12010191] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/27/2022] [Accepted: 12/31/2022] [Indexed: 01/05/2023] Open
Abstract
GBA gene variants were the first genetic risk factor for Parkinson's disease. GBA encodes the lysosomal enzyme glucocerebrosidase (GBA), which is involved in sphingolipid metabolism. GBA exhibits a complex physiological function that includes not only the degradation of its substrate glucosylceramide but also the metabolism of other sphingolipids and additional lipids such as cholesterol, particularly when glucocerebrosidase activity is deficient. In the context of Parkinson's disease associated with GBA, the loss of GBA activity has been associated with the accumulation of α-synuclein species. In recent years, several hypotheses have proposed alternative and complementary pathological mechanisms to explain why lysosomal enzyme mutations lead to α-synuclein accumulation and become important risk factors in Parkinson's disease etiology. Classically, loss of GBA activity has been linked to a dysfunctional autophagy-lysosome system and to a subsequent decrease in autophagy-dependent α-synuclein turnover; however, several other pathological mechanisms underlying GBA-associated parkinsonism have been proposed. This review summarizes and discusses the different hypotheses with a special focus on autophagy-dependent mechanisms, as well as autophagy-independent mechanisms, where the role of other players such as sphingolipids, cholesterol and other GBA-related proteins make important contributions to Parkinson's disease pathogenesis.
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10
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Oizumi H, Sugimura Y, Totsune T, Kawasaki I, Ohshiro S, Baba T, Kimpara T, Sakuma H, Hasegawa T, Kawahata I, Fukunaga K, Takeda A. Plasma sphingolipid abnormalities in neurodegenerative diseases. PLoS One 2022; 17:e0279315. [PMID: 36525454 PMCID: PMC9757566 DOI: 10.1371/journal.pone.0279315] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND In recent years, there has been increasing evidence that several lipid metabolism abnormalities play an important role in the pathogenesis of neurodegenerative diseases. However, it is still unclear which lipid metabolism abnormalities play the most important role in neurodegenerative diseases. Plasma lipid metabolomics (lipidomics) has been shown to be an unbiased method that can be used to explore lipid metabolism abnormalities in neurodegenerative diseases. Plasma lipidomics in neurodegenerative diseases has been performed only in idiopathic Parkinson's disease (IPD) and Alzheimer's disease (AD), and comprehensive studies are needed to clarify the pathogenesis. METHODS In this study, we investigated plasma lipids using lipidomics in individuals with neurodegenerative diseases and healthy controls (CNs). Plasma lipidomics was evaluated by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in those with IPD, dementia with Lewy bodies (DLB), multiple system atrophy (MSA), AD, and progressive supranuclear palsy (PSP) and CNs. RESULTS The results showed that (1) plasma sphingosine-1-phosphate (S1P) was significantly lower in all neurodegenerative disease groups (IPD, DLB, MSA, AD, and PSP) than in the CN group. (2) Plasma monohexylceramide (MonCer) and lactosylceramide (LacCer) were significantly higher in all neurodegenerative disease groups (IPD, DLB, MSA, AD, and PSP) than in the CN group. (3) Plasma MonCer levels were significantly positively correlated with plasma LacCer levels in all enrolled groups. CONCLUSION S1P, Glucosylceramide (GlcCer), the main component of MonCer, and LacCer are sphingolipids that are biosynthesized from ceramide. Recent studies have suggested that elevated GlcCer and decreased S1P levels in neurons are related to neuronal cell death and that elevated LacCer levels induce neurodegeneration by neuroinflammation. In the present study, we found decreased plasma S1P levels and elevated plasma MonCer and LacCer levels in those with neurodegenerative diseases, which is a new finding indicating the importance of abnormal sphingolipid metabolism in neurodegeneration.
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Affiliation(s)
- Hideki Oizumi
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Yoko Sugimura
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Tomoko Totsune
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Iori Kawasaki
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Saki Ohshiro
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Toru Baba
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Teiko Kimpara
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Hiroaki Sakuma
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
| | - Takafumi Hasegawa
- Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ichiro Kawahata
- Department of Pharmacology, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai, Japan
| | - Kohji Fukunaga
- Department of Pharmacology, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai, Japan
| | - Atsushi Takeda
- Department of Neurology, National Hospital Organization Sendai Nishitaga Hospital, Sendai, Japan
- Department of Cognitive and Motor Aging, Tohoku University Graduate School of Medicine, Sendai, Japan
- * E-mail:
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O’Day DH. Calmodulin Binding Domains in Critical Risk Proteins Involved in Neurodegeneration. Curr Issues Mol Biol 2022; 44:5802-5814. [PMID: 36421678 PMCID: PMC9689381 DOI: 10.3390/cimb44110394] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 08/26/2023] Open
Abstract
Neurodegeneration leads to multiple early changes in cognitive, emotional, and social behaviours and ultimately progresses to dementia. The dysregulation of calcium is one of the earliest potentially initiating events in the development of neurodegenerative diseases. A primary neuronal target of calcium is the small sensor and effector protein calmodulin that, in response to calcium levels, binds to and regulates hundreds of calmodulin binding proteins. The intimate and entangled relationship between calmodulin binding proteins and all phases of Alzheimer's disease has been established, but the relationship to other neurodegenerative diseases is just beginning to be evaluated. Risk factors and hallmark proteins from Parkinson's disease (PD; SNCA, Parkin, PINK1, LRRK2, PARK7), Huntington's disease (HD; Htt, TGM1, TGM2), Lewy Body disease (LBD; TMEM175, GBA), and amyotrophic lateral sclerosis/frontotemporal disease (ALS/FTD; VCP, FUS, TDP-43, TBK1, C90rf72, SQSTM1, CHCHD10, SOD1) were scanned for the presence of calmodulin binding domains and, within them, appropriate binding motifs. Binding domains and motifs were identified in multiple risk proteins, some of which are involved in multiple neurodegenerative diseases. The potential calmodulin binding profiles for risk proteins involved in HD, PD, LBD, and ALS/FTD coupled with other studies on proven binding proteins supports the central and potentially critical role for calmodulin in neurodegenerative events.
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Affiliation(s)
- Danton H. O’Day
- Department of Biology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada;
- Department of Cell and Systems Biology, University of Toronto, Toronto, ON M5S 3G5, Canada
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12
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Kim J, Daadi EW, Oh T, Daadi ES, Daadi MM. Human Induced Pluripotent Stem Cell Phenotyping and Preclinical Modeling of Familial Parkinson's Disease. Genes (Basel) 2022; 13:1937. [PMID: 36360174 PMCID: PMC9689743 DOI: 10.3390/genes13111937] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 10/13/2022] [Accepted: 10/18/2022] [Indexed: 12/05/2022] Open
Abstract
Parkinson's disease (PD) is primarily idiopathic and a highly heterogenous neurodegenerative disease with patients experiencing a wide array of motor and non-motor symptoms. A major challenge for understanding susceptibility to PD is to determine the genetic and environmental factors that influence the mechanisms underlying the variations in disease-associated traits. The pathological hallmark of PD is the degeneration of dopaminergic neurons in the substantia nigra pars compacta region of the brain and post-mortem Lewy pathology, which leads to the loss of projecting axons innervating the striatum and to impaired motor and cognitive functions. While the cause of PD is still largely unknown, genome-wide association studies provide evidence that numerous polymorphic variants in various genes contribute to sporadic PD, and 10 to 15% of all cases are linked to some form of hereditary mutations, either autosomal dominant or recessive. Among the most common mutations observed in PD patients are in the genes LRRK2, SNCA, GBA1, PINK1, PRKN, and PARK7/DJ-1. In this review, we cover these PD-related mutations, the use of induced pluripotent stem cells as a disease in a dish model, and genetic animal models to better understand the diversity in the pathogenesis and long-term outcomes seen in PD patients.
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Affiliation(s)
- Jeffrey Kim
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
- Cell Systems and Anatomy, San Antonio, TX 78229, USA
| | - Etienne W. Daadi
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
| | - Thomas Oh
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
| | - Elyas S. Daadi
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
| | - Marcel M. Daadi
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78227, USA
- Cell Systems and Anatomy, San Antonio, TX 78229, USA
- Department of Radiology, Long School of Medicine, University of Texas Health at San Antonio, San Antonio, TX 78229, USA
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13
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Ruz C, Barrero FJ, Pelegrina J, Bandrés-Ciga S, Vives F, Duran R. Saposin C, Key Regulator in the Alpha-Synuclein Degradation Mediated by Lysosome. Int J Mol Sci 2022; 23:ijms231912004. [PMID: 36233303 PMCID: PMC9569857 DOI: 10.3390/ijms231912004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 10/01/2022] [Accepted: 10/05/2022] [Indexed: 11/13/2022] Open
Abstract
Lysosomal dysfunction has been proposed as one of the most important pathogenic molecular mechanisms in Parkinson disease (PD). The most significant evidence lies in the GBA gene, which encodes for the lysosomal enzyme β-glucocerebrosidase (β-GCase), considered the main genetic risk factor for sporadic PD. The loss of β-GCase activity results in the formation of α-synuclein deposits. The present study was aimed to determine the activity of the main lysosomal enzymes and the cofactors Prosaposin (PSAP) and Saposin C in PD and healthy controls, and their contribution to α-synuclein (α-Syn) aggregation. 42 PD patients and 37 age-matched healthy controls were included in the study. We first analyzed the β-GCase, β-galactosidase (β-gal), β-hexosaminidase (Hex B) and Cathepsin D (CatD) activities in white blood cells. We also measured the GBA, β-GAL, β-HEX, CTSD, PSAP, Saposin C and α-Syn protein levels by Western-blot. We found a 20% reduced β-GCase and β-gal activities in PD patients compared to controls. PSAP and Saposin C protein levels were significantly lower in PD patients and correlated with increased levels of α-synuclein. CatD, in contrast, showed significantly increased activity and protein levels in PD patients compared to controls. Increased CTSD protein levels in PD patients correlated, intriguingly, with a higher concentration of α-Syn. Our findings suggest that lysosomal dysfunction in sporadic PD is due, at least in part, to an alteration in Saposin C derived from reduced PSAP levels. That would lead to a significant decrease in the β-GCase activity, resulting in the accumulation of α-syn. The accumulation of monohexosylceramides might act in favor of CTSD activation and, therefore, increase its enzymatic activity. The evaluation of lysosomal activity in the peripheral blood of patients is expected to be a promising approach to investigate pathological mechanisms and novel therapies aimed to restore the lysosomal function in sporadic PD.
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Affiliation(s)
- Clara Ruz
- Department of Physiology and Institute of Neurosciences “Federico Olóriz”, Centre of Biomedical Research, University of Granada, 18016 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain
| | - Francisco J. Barrero
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain
- Movement Disorders Unit, University Hospital Clinic San Cecilio, 18016 Granada, Spain
| | - Javier Pelegrina
- Movement Disorders Unit, University Hospital Clinic San Cecilio, 18016 Granada, Spain
| | - Sara Bandrés-Ciga
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain
- Molecular Genetics Section, Laboratory of Neurogenetics, National Institute on Aging, National Institutes of Health, Bethesda, MD 20898, USA
| | - Francisco Vives
- Department of Physiology and Institute of Neurosciences “Federico Olóriz”, Centre of Biomedical Research, University of Granada, 18016 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain
| | - Raquel Duran
- Department of Physiology and Institute of Neurosciences “Federico Olóriz”, Centre of Biomedical Research, University of Granada, 18016 Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain
- Correspondence:
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14
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Polinski NK, Martinez TN, Ramboz S, Sasner M, Herberth M, Switzer R, Ahmad SO, Pelligrino LJ, Clark SW, Marcus JN, Smith SM, Dave KD, Frasier MA. The GBA1 D409V mutation exacerbates synuclein pathology to differing extents in two alpha-synuclein models. Dis Model Mech 2022; 15:275065. [PMID: 35419585 PMCID: PMC9150115 DOI: 10.1242/dmm.049192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 04/11/2022] [Indexed: 11/28/2022] Open
Abstract
Heterozygous mutations in the GBA1 gene – encoding lysosomal glucocerebrosidase (GCase) – are the most common genetic risk factors for Parkinson's disease (PD). Experimental evidence suggests a correlation between decreased GCase activity and accumulation of alpha-synuclein (aSyn). To enable a better understanding of the relationship between aSyn and GCase activity, we developed and characterized two mouse models that investigate aSyn pathology in the context of reduced GCase activity. The first model used constitutive overexpression of wild-type human aSyn in the context of the homozygous GCase activity-reducing D409V mutant form of GBA1. Although increased aSyn pathology and grip strength reductions were observed in this model, the nigrostriatal system remained largely intact. The second model involved injection of aSyn preformed fibrils (PFFs) into the striatum of the homozygous GBA1 D409V knock-in mouse model. The GBA1 D409V mutation did not exacerbate the pathology induced by aSyn PFF injection. This study sheds light on the relationship between aSyn and GCase in mouse models, highlighting the impact of model design on the ability to model a relationship between these proteins in PD-related pathology. Summary: Phenotyping data for two novel mouse models combining glucocerebrosidase (GCase) deficiencies and alpha-synuclein pathology reveal the extent to which alpha-synuclein pathology is exacerbated by GCase deficiency.
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Affiliation(s)
- Nicole K Polinski
- The Michael J. Fox Foundation for Parkinson's Research, Grand Central Station PO Box 4777, New York, NY 10163, USA
| | - Terina N Martinez
- The Michael J. Fox Foundation for Parkinson's Research, Grand Central Station PO Box 4777, New York, NY 10163, USA
| | - Sylvie Ramboz
- PsychoGenics, Inc, 215 College Road, Paramus, NJ 07652, USA
| | - Michael Sasner
- The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609, USA
| | - Mark Herberth
- Charles River Laboratories, 1407 George Road, Ashland, OH 44805, USA
| | - Robert Switzer
- NeuroScience Associates, 10915 Lake Ridge Drive, Knoxville, TN 37934, USA
| | - Syed O Ahmad
- Saint Louis University, 3437 Caroline Street, St. Louis, MO 63104, USA
| | | | - Sean W Clark
- Amicus Therapeutics, 1 Cedarbrook Dr, Cranbury, NJ 08512, USA
| | - Jacob N Marcus
- Merck & Co., Inc., 2000 Galloping Hill Road, Kenilworth, NJ 07033, USA
| | - Sean M Smith
- Merck & Co., Inc., 2000 Galloping Hill Road, Kenilworth, NJ 07033, USA
| | - Kuldip D Dave
- The Michael J. Fox Foundation for Parkinson's Research, Grand Central Station PO Box 4777, New York, NY 10163, USA
| | - Mark A Frasier
- The Michael J. Fox Foundation for Parkinson's Research, Grand Central Station PO Box 4777, New York, NY 10163, USA
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15
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Cui J, Yuan Y, Wang J, Song N, Xie J. Desferrioxamine Ameliorates Lipopolysaccharide-Induced Lipocalin-2 Upregulation via Autophagy Activation in Primary Astrocytes. Mol Neurobiol 2022; 59:2052-2067. [PMID: 35040039 DOI: 10.1007/s12035-021-02687-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 12/08/2021] [Indexed: 01/18/2023]
Abstract
Lipocalin-2 (LCN2) is an important regulator of both neuroinflammation and iron homeostasis. Upregulated LCN2 was observed in reactive astrocytes in the Parkinson's disease (PD) models. In the present study, we reported iron chelator deferoxamine (DFO) abolished lipopolysaccharide (LPS)-induced LCN2 upregulation in primary astrocytes, although iron overload had no effects. The suppressive effects of DFO were consistent with autophagy inducer rapamycin or carfilzomib, blocked by autophagy inhibitor 3-methyladenine rather than chloroquine or bafilomycin A1, meanwhile, while were not dependent on proteasome system and NF-κB pathway. DFO was not able to ameliorate LCN2 upregulation in α-synuclein-treated astrocytes, because DFO failed to induce autophagy in these cells. We further demonstrated that DFO could not enhance autophagy lysosomal degradation, however promoted secretory autophagy in primary astrocytes with LPS insults. These data suggest that DFO could serve as an autophagy activator, capable of ameliorating the upregulation of LCN2 in astrocytes by acting on the formation of autophagosomes and secretory autophagy. This provides better understandings of DFO-mediated neuroprotection against neuroinflammation and provides new insights that autophagy activation could be beneficial approaches in PD.
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Affiliation(s)
- Juntao Cui
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266071, China
| | - Yu Yuan
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266071, China
| | - Jun Wang
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266071, China
| | - Ning Song
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266071, China.
| | - Junxia Xie
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266071, China.
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16
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Parkinson's Disease Subtyping Using Clinical Features and Biomarkers: Literature Review and Preliminary Study of Subtype Clustering. Diagnostics (Basel) 2022; 12:diagnostics12010112. [PMID: 35054279 PMCID: PMC8774435 DOI: 10.3390/diagnostics12010112] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/31/2021] [Accepted: 01/03/2022] [Indexed: 12/29/2022] Open
Abstract
The second most common progressive neurodegenerative disorder, Parkinson’s disease (PD), is characterized by a broad spectrum of symptoms that are associated with its progression. Several studies have attempted to classify PD according to its clinical manifestations and establish objective biomarkers for early diagnosis and for predicting the prognosis of the disease. Recent comprehensive research on the classification of PD using clinical phenotypes has included factors such as dominance, severity, and prognosis of motor and non-motor symptoms and biomarkers. Additionally, neuroimaging studies have attempted to reveal the pathological substrate for motor symptoms. Genetic and transcriptomic studies have contributed to our understanding of the underlying molecular pathogenic mechanisms and provided a basis for classifying PD. Moreover, an understanding of the heterogeneity of clinical manifestations in PD is required for a personalized medicine approach. Herein, we discuss the possible subtypes of PD based on clinical features, neuroimaging, and biomarkers for developing personalized medicine for PD. In addition, we conduct a preliminary clustering using gait features for subtyping PD. We believe that subtyping may facilitate the development of therapeutic strategies for PD.
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17
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Al-Azzawi ZAM, Arfaie S, Gan-Or Z. GBA1 and The Immune System: A Potential Role in Parkinson's Disease? JOURNAL OF PARKINSON'S DISEASE 2022; 12:S53-S64. [PMID: 36057834 PMCID: PMC9535551 DOI: 10.3233/jpd-223423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
It is clear that the immune system and inflammation have a role in Parkinson's disease (PD), including sporadic PD and some genetic forms such as LRRK2-associated PD. One of the most important genes associated with PD is GBA1, as variants in this gene are found in 5-20% of PD patients in different populations worldwide. Biallelic variants in GBA1 may cause Gaucher disease, a lysosomal storage disorder with involvement of the immune system, and other lines of evidence link GBA1 to the immune system and inflammation. In this review, we discuss these different pieces of evidence and whether the interplay between GBA1 and the immune system may have a role in PD.
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Affiliation(s)
- Zaid A M Al-Azzawi
- Faculty of Medicine, McGill University, Montreal, QC, Canada
- Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
| | - Saman Arfaie
- Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Ziv Gan-Or
- Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada
- The Neuro - Montreal Neurological Institute-Hospital, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
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18
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Glucocerebrosidase dysfunction in neurodegenerative disease. Essays Biochem 2021; 65:873-883. [PMID: 34528667 DOI: 10.1042/ebc20210018] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/26/2021] [Accepted: 09/01/2021] [Indexed: 12/12/2022]
Abstract
Parkinson's disease (PD) and related neurodegenerative disorders, termed the synucleinopathies, are characterized pathologically by the accumulation of protein aggregates containing α-synuclein (aSyn), resulting in progressive neuronal loss. There is considerable need for the development of neuroprotective strategies to halt or slow disease progression in these disorders. To this end, evaluation of genetic mutations associated with the synucleinopathies has helped to elucidate crucial mechanisms of disease pathogenesis, revealing key roles for lysosomal and mitochondrial dysfunction. The GBA1 gene, which encodes the lysosomal hydrolase β-glucocerebrosidase (GCase) is the most common genetic risk factor for PD and is also linked to other neurodegenerative disorders including dementia with Lewy bodies (DLB). Additionally, homozygous mutations in GBA1 are associated with the rare lysosomal storage disorder, Gaucher's disease (GD). In this review, we discuss the current knowledge in the field regarding the diverse roles of GCase in neurons and the multifactorial effects of loss of GCase enzymatic activity. Importantly, GCase has been shown to have a bidirectional relationship with aSyn, resulting in a pathogenic feedback loop that can lead to progressive aSyn accumulation. Alterations in GCase activity have furthermore been linked to multiple distinct pathways involved in neurodegeneration, and therefore GCase has emerged as a promising target for therapeutic drug development for PD and related neurodegenerative disorders, particularly DLB.
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19
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Glycoconjugate journal special issue on: the glycobiology of Parkinson's disease. Glycoconj J 2021; 39:55-74. [PMID: 34757539 DOI: 10.1007/s10719-021-10024-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/14/2021] [Accepted: 09/24/2021] [Indexed: 10/19/2022]
Abstract
Parkinson's disease (PD) is a neurodegenerative disorder that affects over 10 million aging people worldwide. This condition is characterized by the degeneration of dopaminergic neurons in the pars compacta region of the substantia nigra (SNpc) and by aggregation of proteins, commonly α-synuclein (SNCA). The formation of Lewy bodies that encapsulate aggregated proteins in lipid vesicles is a hallmark of PD. Glycosylation of proteins and neuroinflammation are involved in the pathogenesis. SNCA has many posttranslational modifications and interacts with components of membranes that affect aggregation. The large membrane lipid dolichol accumulates in the brain upon age and has a significant effect on membrane structure. The replacement of dopamine and dopaminergic neurons are at the forefront of therapeutic development. This review examines the role of membrane lipids, glycolipids, glycoproteins and dopamine in the aggregation of SNCA and development of PD. We discuss the SNCA-dopamine-neuromelanin-dolichol axis and the role of membranes in neuronal stem cells that could be a regenerative therapy for PD patients.
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20
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Hommen F, Bilican S, Vilchez D. Protein clearance strategies for disease intervention. J Neural Transm (Vienna) 2021; 129:141-172. [PMID: 34689261 PMCID: PMC8541819 DOI: 10.1007/s00702-021-02431-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/10/2021] [Indexed: 02/06/2023]
Abstract
Protein homeostasis, or proteostasis, is essential for cell function and viability. Unwanted, damaged, misfolded and aggregated proteins are degraded by the ubiquitin–proteasome system (UPS) and the autophagy-lysosome pathway. Growing evidence indicates that alterations in these major proteolytic mechanisms lead to a demise in proteostasis, contributing to the onset and development of distinct diseases. Indeed, dysregulation of the UPS or autophagy is linked to several neurodegenerative, infectious and inflammatory disorders as well as cancer. Thus, modulation of protein clearance pathways is a promising approach for therapeutics. In this review, we discuss recent findings and open questions on how targeting proteolytic mechanisms could be applied for disease intervention.
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Affiliation(s)
- Franziska Hommen
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph Stelzmann Strasse 26, 50931, Cologne, Germany
| | - Saygın Bilican
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph Stelzmann Strasse 26, 50931, Cologne, Germany
| | - David Vilchez
- Cologne Excellence Cluster for Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Joseph Stelzmann Strasse 26, 50931, Cologne, Germany. .,Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany. .,Faculty of Medicine, University Hospital Cologne, Cologne, Germany.
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21
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Cosden M, Jinn S, Yao L, Gretzula CA, Kandebo M, Toolan D, Hatcher NG, Ma L, Lemaire W, Adam GC, Burlein C, Minnick C, Flick R, Watt ML, Mulhearn J, Fraley M, Drolet RE, Marcus JN, Smith SM. A novel glucosylceramide synthase inhibitor attenuates alpha synuclein pathology and lysosomal dysfunction in preclinical models of synucleinopathy. Neurobiol Dis 2021; 159:105507. [PMID: 34509608 DOI: 10.1016/j.nbd.2021.105507] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 08/26/2021] [Accepted: 09/07/2021] [Indexed: 11/16/2022] Open
Abstract
Mutations in the lysosomal enzyme glucocerebrosidase (GCase, GBA1 gene) are the most common genetic risk factor for developing Parkinson's disease (PD). GCase metabolizes the glycosphingolipids glucosylceramide (GlcCer) and glucosylsphingosine (GlcSph). Mutations in GBA1 reduce enzyme activity and the resulting accumulation of glycosphingolipids may contribute to the underlying pathology of PD, possibly via altering lysosomal function. While reduction of GCase activity exacerbates α-synuclein (α-syn) aggregation, it has not been determined that this effect is the result of altered glycosphingolipid levels and lysosome function or some other effect of altering GCase. The glycosphingolipid GlcCer is synthesized by a single enzyme, glucosylceramide synthase (GCS), and small molecule inhibitors (GCSi) reduce cellular glycosphingolipid levels. In the present studies, we utilize a preformed fibril (PFF) rodent primary neuron in vitro model of α-syn pathology to investigate the relationship between glycosphingolipid levels, α-syn pathology, and lysosomal function. In primary cultures, pharmacological inhibition of GCase and D409V GBA1 mutation enhanced accumulation of glycosphingolipids and insoluble phosphorylated α-syn. Administration of a novel small molecule GCSi, benzoxazole 1 (BZ1), significantly decreased glycosphingolipid concentrations in rodent primary neurons and reduced α-syn pathology. BZ1 rescued lysosomal deficits associated with the D409V GBA1 mutation and α-syn PFF administration, and attenuated α-syn induced neurodegeneration of dopamine neurons. In vivo studies revealed BZ1 had pharmacological activity and reduced glycosphingolipids in the mouse brain to a similar extent observed in neuronal cultures. These data support the hypothesis that reduction of glycosphingolipids through GCS inhibition may impact progression of synucleinopathy and BZ1 is useful tool to further examine this important biology.
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Affiliation(s)
- Mali Cosden
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Sarah Jinn
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Lihang Yao
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Cheryl A Gretzula
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Monika Kandebo
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Dawn Toolan
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Nathan G Hatcher
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Lei Ma
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Wei Lemaire
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - Gregory C Adam
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - Christine Burlein
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - Christina Minnick
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - Rose Flick
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - Marla L Watt
- Quantitative Biosciences, Merck & Co., Inc., West Point, PA 19486, United States
| | - James Mulhearn
- Discovery Chemistry, Merck & Co., Inc., West Point, PA 19486, United States
| | - Mark Fraley
- Discovery Chemistry, Merck & Co., Inc., West Point, PA 19486, United States
| | - Robert E Drolet
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Jacob N Marcus
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States
| | - Sean M Smith
- Neuroscience Discovery, Merck & Co., Inc., West Point, PA 19486, United States.
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22
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Do J, Perez G, Berhe B, Tayebi N, Sidransky E. Behavioral Phenotyping in a Murine Model of GBA1-Associated Parkinson Disease. Int J Mol Sci 2021; 22:ijms22136826. [PMID: 34202076 PMCID: PMC8267726 DOI: 10.3390/ijms22136826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/11/2021] [Accepted: 06/22/2021] [Indexed: 01/15/2023] Open
Abstract
Mutations in GBA1, the gene encoding glucocerebrosidase, are common genetic risk factors for Parkinson disease (PD). While the mechanism underlying this relationship is unclear, patients with GBA1-associated PD often have an earlier onset and faster progression than idiopathic PD. Previously, we modeled GBA1-associated PD by crossing gba haploinsufficient mice with mice overexpressing a human mutant α-synuclein transgene (SNCAA53T), observing an earlier demise, shorter life span and faster symptom progression, although behavioral testing was not performed. To assess whether gba+/−//SNCAA53T mice exhibit a prodromal behavioral phenotype, we studied three cardinal PD features: olfactory discrimination, memory dysfunction, and motor function. The longitudinal performance of gba+/−//SNCAA53T (n = 8), SNCAA53T (n = 9), gba+/− (n = 10) and wildtype (n = 6) mice was evaluated between ages 8 and 23 months using the buried pellet test, novel object recognition test and the beam walk. Fifteen-month-old gba+/−//SNCAA53T mice showed more olfactory and motor deficits than wildtype mice. However, differences between gba+/−//SNCAA53T and SNCAA53T mice generally did not reach statistical significance, possibly due to small sample sizes. Furthermore, while gba haploinsufficiency leads to a more rapid demise, this might not result in an earlier prodromal stage, and other factors, including aging, oxidative stress and epigenetics, may contribute to the more fulminant disease course.
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Affiliation(s)
| | | | | | - Nahid Tayebi
- Correspondence: (N.T.); (E.S.); Tel.: +1-301-496-0373 (N.T.); +1-301-451-0901 (E.S.)
| | - Ellen Sidransky
- Correspondence: (N.T.); (E.S.); Tel.: +1-301-496-0373 (N.T.); +1-301-451-0901 (E.S.)
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23
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Rodrigues PS, Kale PP. Mini review - The role of Glucocerebrosidase and Progranulin as possible targets in the treatment of Parkinson's disease. Rev Neurol (Paris) 2021; 177:1082-1089. [PMID: 34175090 DOI: 10.1016/j.neurol.2021.01.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 01/09/2021] [Accepted: 01/15/2021] [Indexed: 10/21/2022]
Abstract
As per recent reports, there is an association between glucocerebrosidase (Gcase) enzyme and Parkinson's disease (PD). In addition, certain mutations in the Gcase gene (GBA) and the progranulin (PGRN) gene are found to be linked with the imbalance in the levels of Gcase enzyme. This imbalance or decrease or impairment in Gcase activity can lead to Gaucher disease, frontotemporal lobar degeneration (FTLD), dementia, etc. Recent evidences suggest that the drugs used to treat these diseases can be used for PD. The present review has focused on the therapeutic approaches used for diseases linked with Gcase enzyme, which can be used for PD. The review also considered possible target specific novel strategies, which may help to meet the unmet needs in the treatment of PD.
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Affiliation(s)
- P S Rodrigues
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, V L M Road, Vile Parle west, 400056 Mumbai, India
| | - P P Kale
- Department of Pharmacology, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, V L M Road, Vile Parle west, 400056 Mumbai, India.
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24
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García‐Sanz P, M.F.G. Aerts J, Moratalla R. The Role of Cholesterol in α-Synuclein and Lewy Body Pathology in GBA1 Parkinson's Disease. Mov Disord 2021; 36:1070-1085. [PMID: 33219714 PMCID: PMC8247417 DOI: 10.1002/mds.28396] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 11/01/2020] [Accepted: 11/03/2020] [Indexed: 02/06/2023] Open
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disease where dopaminergic neurons in the substantia nigra are lost, resulting in a decrease in striatal dopamine and, consequently, motor control. Dopaminergic degeneration is associated with the appearance of Lewy bodies, which contain membrane structures and proteins, including α-synuclein (α-Syn), in surviving neurons. PD displays a multifactorial pathology and develops from interactions between multiple elements, such as age, environmental conditions, and genetics. Mutations in the GBA1 gene represent one of the major genetic risk factors for PD. This gene encodes an essential lysosomal enzyme called β-glucocerebrosidase (GCase), which is responsible for degrading the glycolipid glucocerebroside into glucose and ceramide. GCase can generate glucosylated cholesterol via transglucosylation and can also degrade the sterol glucoside. Although the molecular mechanisms that predispose an individual to neurodegeneration remain unknown, the role of cholesterol in PD pathology deserves consideration. Disturbed cellular cholesterol metabolism, as reflected by accumulation of lysosomal cholesterol in GBA1-associated PD cellular models, could contribute to changes in lipid rafts, which are necessary for synaptic localization and vesicle cycling and modulation of synaptic integrity. α-Syn has been implicated in the regulation of neuronal cholesterol, and cholesterol facilitates interactions between α-Syn oligomers. In this review, we integrate the results of previous studies and describe the cholesterol landscape in cellular homeostasis and neuronal function. We discuss its implication in α-Syn and Lewy body pathophysiological mechanisms underlying PD, focusing on the role of GCase and cholesterol. © 2020 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Patricia García‐Sanz
- Instituto Cajal, CSICMadridSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades NeurodegenerativasInstituto de Salud Carlos IIIMadridSpain
| | - Johannes M.F.G. Aerts
- Medical Biochemistry, Leiden Institute of Chemistry, Leiden UniversityFaculty of ScienceLeidenthe Netherlands
| | - Rosario Moratalla
- Instituto Cajal, CSICMadridSpain
- Centro de Investigación Biomédica en Red sobre Enfermedades NeurodegenerativasInstituto de Salud Carlos IIIMadridSpain
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25
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Senkevich KA, Kopytova AE, Usenko TS, Emelyanov AK, Pchelina SN. Parkinson's Disease Associated with GBA Gene Mutations: Molecular Aspects and Potential Treatment Approaches. Acta Naturae 2021; 13:70-78. [PMID: 34377557 PMCID: PMC8327146 DOI: 10.32607/actanaturae.11031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 09/03/2020] [Indexed: 01/01/2023] Open
Abstract
Parkinson's disease (PD) is a multifactorial neurodegenerative disease. To date, genome-wide association studies have identified more than 70 loci associated with the risk of PD. Variants in the GBA gene encoding glucocerebrosidase are quite often found in PD patients in all populations across the world, which justifies intensive investigation of this gene. A number of biochemical features have been identified in patients with GBA-associated Parkinson's disease (GBA-PD). In particular, these include decreased activity of glucocerebrosidase and accumulation of the glucosylceramide substrate. These features were the basis for putting forward a hypothesis about treatment of GBA-PD using new strategies aimed at restoring glucocerebrosidase activity and reducing the substrate concentration. This paper discusses the molecular and genetic mechanisms of GBA-PD pathogenesis and potential approaches to the treatment of this form of the disease.
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Affiliation(s)
- K. A. Senkevich
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Saint-Petersburg, 188300 Russia
- First Pavlov State Medical University of St. Petersburg, Saint-Petersburg, 197022 Russia
- Montreal Neurological Institute, McGill University, Montréal, QC, H3A 1A1, Canada
| | - A. E. Kopytova
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Saint-Petersburg, 188300 Russia
- First Pavlov State Medical University of St. Petersburg, Saint-Petersburg, 197022 Russia
| | - T. S. Usenko
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Saint-Petersburg, 188300 Russia
- First Pavlov State Medical University of St. Petersburg, Saint-Petersburg, 197022 Russia
| | - A. K. Emelyanov
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Saint-Petersburg, 188300 Russia
- First Pavlov State Medical University of St. Petersburg, Saint-Petersburg, 197022 Russia
| | - S. N. Pchelina
- Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre «Kurchatov Institute», Saint-Petersburg, 188300 Russia
- First Pavlov State Medical University of St. Petersburg, Saint-Petersburg, 197022 Russia
- Institute of Experimental Medicine, St. Petersburg, 197376 Russia
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26
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Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder resulting from the death of dopamine neurons in the substantia nigra pars compacta. Our understanding of PD biology has been enriched by the identification of genes involved in its rare, inheritable forms, termed PARK genes. These genes encode proteins including α-syn, LRRK2, VPS35, parkin, PINK1, and DJ1, which can cause monogenetic PD when mutated. Investigating the cellular functions of these proteins has been instrumental in identifying signaling pathways that mediate pathology in PD and neuroprotective mechanisms active during homeostatic and pathological conditions. It is now evident that many PD-associated proteins perform multiple functions in PD-associated signaling pathways in neurons. Furthermore, several PARK proteins contribute to non-cell-autonomous mechanisms of neuron death, such as neuroinflammation. A comprehensive understanding of cell-autonomous and non-cell-autonomous pathways involved in PD is essential for developing therapeutics that may slow or halt its progression.
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Affiliation(s)
- Nikhil Panicker
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Preston Ge
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD.,Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD.,Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA
| | - Valina L Dawson
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD.,Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD.,Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA.,Diana Helis Henry Medical Research Foundation, New Orleans, LA
| | - Ted M Dawson
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD.,Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD.,Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD.,Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA.,Diana Helis Henry Medical Research Foundation, New Orleans, LA
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27
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Benz J, Rufer AC, Huber S, Ehler A, Hug M, Topp A, Guba W, Hofmann EC, Jagasia R, Rodríguez Sarmiento RM. Novel β-Glucocerebrosidase Activators That Bind to a New Pocket at a Dimer Interface and Induce Dimerization. Angew Chem Int Ed Engl 2021; 60:5436-5442. [PMID: 33238058 DOI: 10.1002/anie.202013890] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Indexed: 11/08/2022]
Abstract
Genetic, preclinical and clinical data link Parkinson's disease and Gaucher's disease and provide a rational entry point to disease modification therapy via enhancement of β-Glucocerebrosidase (GCase) activity. We discovered a new class of pyrrolo[2,3-b]pyrazine activators effecting both Vmax and Km. They bind to human GCase and increase substrate metabolism in the lysosome in a cellular assay. We obtained the first crystal structure for an activator and identified a novel non-inhibitory binding mode at the interface of a dimer, rationalizing the observed structure-activity relationship (SAR). The compound binds GCase inducing formation of a dimeric state at both endoplasmic reticulum (ER) and lysosomal pHs, as confirmed by analytical ultracentrifugation. Importantly, the pyrrolo[2,3-b]pyrazines have central nervous system (CNS) drug-like properties. Our findings are important for future drug discovery efforts in the field of GCase activation and provide a deeper mechanistic understanding of the requirements for enzymatic activation, pointing to the relevance of dimerization.
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Affiliation(s)
- Joerg Benz
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Arne C Rufer
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Sylwia Huber
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Andreas Ehler
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Melanie Hug
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Andreas Topp
- Lead Discovery, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Wolfgang Guba
- CADD, Roche Innovation Center Basel, Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Eva Carolina Hofmann
- Roche Pharma Research and Early Development, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Ravi Jagasia
- NRD, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
| | - Rosa María Rodríguez Sarmiento
- Medicinal Chemistry, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd., Grenzacherstrasse 124, 4070, Basel, Switzerland
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28
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Benz J, Rufer AC, Huber S, Ehler A, Hug M, Topp A, Guba W, Hofmann EC, Jagasia R, Rodríguez Sarmiento RM. Novel β‐Glucocerebrosidase Activators That Bind to a New Pocket at a Dimer Interface and Induce Dimerization. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013890] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Joerg Benz
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Arne C. Rufer
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Sylwia Huber
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Andreas Ehler
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Melanie Hug
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Andreas Topp
- Lead Discovery Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Wolfgang Guba
- CADD Roche Innovation Center Basel Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Eva Carolina Hofmann
- Roche Pharma Research and Early Development Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Ravi Jagasia
- NRD Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
| | - Rosa María Rodríguez Sarmiento
- Medicinal Chemistry Roche Pharma Research and Early Development (pRED) Roche Innovation Center Basel F. Hoffmann-La Roche Ltd. Grenzacherstrasse 124 4070 Basel Switzerland
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29
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Abstract
α-Synuclein (α-syn) is a key protein in the etiology of Parkinson's disease. In a disease state, α-syn accumulates as insoluble amyloid fibrils enriched in β-sheet structure. However, in its functional state, α-syn adopts an amphipathic helix upon membrane association and plays a role in synaptic vesicle docking, fusion, and clustering. In this Account, we describe our contributions made in the past decade toward developing a molecular understanding of α-syn membrane interactions, which are crucial for function and have pathological implications. Three topics are covered: α-syn membrane binding probed by neutron reflectometry (NR), the effects of membrane on α-syn amyloid formation, and interactions of α-syn with cellular membranes.NR offers a unique perspective by providing direct measurements of protein penetration depth. By the use of segmentally deuterated α-syn generated through native chemical ligation, the spatial resolution of specific membrane-bound polypeptide regions was determined by NR. Additionally, we used NR to characterize the membrane-bound complex of α-syn and glucocerebrosidase, a lysosomal hydrolase whose mutations are a common genetic risk factor for Parkinson's disease. Although phosphatidylcholine (PC) is the most abundant lipid species in mammalian cells, interactions of PC with α-syn have been largely ignored because they are substantially weaker compared with the electrostatically driven binding of negatively charged lipids. We discovered that α-syn tubulates zwitterionic PC membranes, which is likely related to its involvement in synaptic vesicle fusion by stabilization of membrane curvature. Interestingly, PC lipid tubules inhibit amyloid formation, in contrast to anionic phosphatidylglycerol lipid tubules, which stimulate protein aggregation. We also found that membrane fluidity influences the propensity of α-synuclein amyloid formation. Most recently, we obtained direct evidence of binding of α-syn to exocytic sites on intact cellular membranes using a method called cellular unroofing. This method provides direct access to the cytosolic plasma membrane. Importantly, measurements of fluorescence lifetime distributions revealed that α-syn is more conformationally dynamic at the membrane interface than previously appreciated. This exquisite responsiveness to specific lipid composition and membrane topology is important for both its physiological and pathological functions. Collectively, our work has provided insights into the effects of the chemical nature of phospholipid headgroups on the interplay among membrane remodeling, protein structure, and α-syn amyloid formation.
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Affiliation(s)
- Upneet Kaur
- Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Jennifer C. Lee
- Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
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30
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Marshall MS, Issa Y, Heller G, Nguyen D, Bongarzone ER. AAV-Mediated GALC Gene Therapy Rescues Alpha-Synucleinopathy in the Spinal Cord of a Leukodystrophic Lysosomal Storage Disease Mouse Model. Front Cell Neurosci 2021; 14:619712. [PMID: 33424556 PMCID: PMC7785790 DOI: 10.3389/fncel.2020.619712] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 11/30/2020] [Indexed: 12/20/2022] Open
Abstract
Krabbe's disease (KD) is primarily a demyelinating disorder, but recent studies have identified the presence of neuronal protein aggregates in the brain, at least partially composed by alpha-synuclein (α-syn). The role of this protein aggregation in the pathogenesis of KD is largely unknown, but it has added KD to a growing list of lysosomal storage diseases that can be also be considered as proteinopathies. While the presence of these protein aggregates within the KD brain is now appreciated, the remainder of the central nervous system (CNS) remains uncharacterized. This study is the first to report the presence of thioflavin-S reactive inclusions throughout the spinal cord of both murine and human spinal tissue. Stereological analysis revealed the temporal and spatial accumulation of these inclusions within the neurons of the ventral spinal cord vs. those located in the dorsal cord. This study also confirmed that these thio-S positive accumulations are present within neuronal populations and are made up at least in part by α-syn in both the twitcher mouse and cord autopsied material from affected human patients. Significantly, neonatal gene therapy for galactosylceramidase, a treatment that strongly improves the survival and health of KD mice, but not bone marrow transplantation prevents the formation of these inclusions in spinal neurons. These results expand the understanding of α-syn protein aggregation within the CNS of individuals afflicted with KD and underlines the tractability of this problem via early gene therapy, with potential impact to other synucleinopathies such as PD.
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Affiliation(s)
- Michael S Marshall
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Yazan Issa
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Gregory Heller
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Duc Nguyen
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Ernesto R Bongarzone
- Department of Anatomy and Cell Biology, College of Medicine, University of Illinois at Chicago, Chicago, IL, United States
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31
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The interplay between Glucocerebrosidase, α-synuclein and lipids in human models of Parkinson's disease. Biophys Chem 2020; 273:106534. [PMID: 33832803 DOI: 10.1016/j.bpc.2020.106534] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/18/2020] [Accepted: 12/18/2020] [Indexed: 12/25/2022]
Abstract
Mutations in the gene GBA, encoding glucocerebrosidase (GCase), are the highest genetic risk factor for Parkinson's disease (PD). GCase is a lysosomal glycoprotein responsible for the hydrolysis of glucosylceramide into glucose and ceramide. Mutations in GBA cause a decrease in GCase activity, stability and protein levels which in turn lead to the accumulation of GCase lipid substrates as well as α-synuclein (αS) in vitro and in vivo. αS is the main constituent of Lewy bodies found in the brain of PD patients and an increase in its levels was found to be associated with a decrease in GCase activity/protein levels in vitro and in vivo. In this review, we describe the reported biophysical and biochemical changes that GBA mutations can induce in GCase activity and stability as well as the current overview of the levels of GCase protein/activity, αS and lipids measured in patient-derived samples including post-mortem brains, stem cell-derived neurons, cerebrospinal fluid, blood and fibroblasts as well as in SH-SY5Y cells. In particular, we report how the levels of αS and lipids are affected by/correlated to significant changes in GCase activity/protein levels and which cellular pathways are activated or disrupted by these changes in each model. Finally, we review the current strategies used to revert the changes in the levels of GCase activity/protein, αS and lipids in the context of PD.
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32
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Wildburger NC, Hartke AS, Schidlitzki A, Richter F. Current Evidence for a Bidirectional Loop Between the Lysosome and Alpha-Synuclein Proteoforms. Front Cell Dev Biol 2020; 8:598446. [PMID: 33282874 PMCID: PMC7705175 DOI: 10.3389/fcell.2020.598446] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 10/28/2020] [Indexed: 12/28/2022] Open
Abstract
Cumulative evidence collected in recent decades suggests that lysosomal dysfunction contributes to neurodegenerative diseases, especially if amyloid proteins are involved. Among these, alpha-synuclein (aSyn) that progressively accumulates and aggregates in Lewy bodies is undisputedly a main culprit in Parkinson disease (PD) pathogenesis. Lysosomal dysfunction is evident in brains of PD patients, and mutations in lysosomal enzymes are a major risk factor of PD. At first glance, the role of protein-degrading lysosomes in a disease with pathological protein accumulation seems obvious and should guide the development of straightforward and rational therapeutic targets. However, our review demonstrates that the story is more complicated for aSyn. The protein can possess diverse posttranslational modifications, aggregate formations, and truncations, all of which contribute to a growing known set of proteoforms. These interfere directly or indirectly with lysosome function, reducing their own degradation, and thereby accelerating the protein aggregation and disease process. Conversely, unbalanced lysosomal enzymatic processes can produce truncated aSyn proteoforms that may be more toxic and prone to aggregation. This highlights the possibility of enhancing lysosomal function as a treatment for PD, if it can be confirmed that this approach effectively reduces harmful aSyn proteoforms and does not produce novel, toxic proteoforms.
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Affiliation(s)
- Norelle C Wildburger
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine, Hanover, Germany.,Center for Systems Neuroscience, Hanover, Germany
| | - Anna-Sophia Hartke
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine, Hanover, Germany
| | - Alina Schidlitzki
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine, Hanover, Germany
| | - Franziska Richter
- Department of Pharmacology, Toxicology, and Pharmacy, University of Veterinary Medicine, Hanover, Germany.,Center for Systems Neuroscience, Hanover, Germany
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33
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Menozzi E, Schapira AHV. Enhancing the Activity of Glucocerebrosidase as a Treatment for Parkinson Disease. CNS Drugs 2020; 34:915-923. [PMID: 32607746 DOI: 10.1007/s40263-020-00746-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Mutations in the glucocerebrosidase (GBA1) gene are the most common genetic risk factor for Parkinson disease (PD). Homozygous or compound heterozygous GBA1 mutations cause the lysosomal storage disorder Gaucher disease (GD), characterized by deficient activity of the glucocerebrosidase enzyme (GCase). Both individuals with GD type I and heterozygous carriers of pathogenic variants of GBA1 have an increased risk of developing PD, by approximately ten- to 20-fold compared to non-carriers. GCase activity is also reduced in PD patients without GBA1 mutations, suggesting that the GCase lysosomal pathway might be involved in PD pathogenesis. Available evidence indicates that GCase can affect α-synuclein pathology in different ways. Misfolded GCase proteins are retained in the endoplasmic reticulum, altering the lysosomal trafficking of the enzyme and disrupting protein trafficking. Also, deficient GCase leads to accumulation of substrates that in turn may bind α-synuclein and promote pathological formation of aggregates. Furthermore, α-synuclein itself can lower the enzymatic activity of GCase, indicating that a bidirectional interaction exists between GCase and α-synuclein. Targeted therapies aimed at enhancing GCase activity, augmenting the trafficking of misfolded GCase proteins by small molecule chaperones, or reducing substrate accumulation, have been tested in preclinical and clinical trials. This article reviews the molecular mechanisms linking GCase to α-synuclein and discusses the therapeutic drugs that by targeting the GCase pathway can influence PD progression.
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Affiliation(s)
- Elisa Menozzi
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK
| | - Anthony H V Schapira
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, London, UK.
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34
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Huh YE, Chiang MSR, Locascio JJ, Liao Z, Liu G, Choudhury K, Kuras YI, Tuncali I, Videnovic A, Hunt AL, Schwarzschild MA, Hung AY, Herrington TM, Hayes MT, Hyman BT, Wills AM, Gomperts SN, Growdon JH, Sardi SP, Scherzer CR. β-Glucocerebrosidase activity in GBA-linked Parkinson disease: The type of mutation matters. Neurology 2020; 95:e685-e696. [PMID: 32540937 PMCID: PMC7455354 DOI: 10.1212/wnl.0000000000009989] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Accepted: 01/26/2020] [Indexed: 02/01/2023] Open
Abstract
OBJECTIVE To test the relationship between clinically relevant types of GBA mutations (none, risk variants, mild mutations, severe mutations) and β-glucocerebrosidase activity in patients with Parkinson disease (PD) in cross-sectional and longitudinal case-control studies. METHODS A total of 481 participants from the Harvard Biomarkers Study (HBS) and the NIH Parkinson's Disease Biomarkers Program (PDBP) were analyzed, including 47 patients with PD carrying GBA variants (GBA-PD), 247 without a GBA variant (idiopathic PD), and 187 healthy controls. Longitudinal analysis comprised 195 participants with 548 longitudinal measurements over a median follow-up period of 2.0 years (interquartile range, 1-2 years). RESULTS β-Glucocerebrosidase activity was low in blood of patients with GBA-PD compared to healthy controls and patients with idiopathic PD, respectively, in HBS (p < 0.001) and PDBP (p < 0.05) in multivariate analyses adjusting for age, sex, blood storage time, and batch. Enzyme activity in patients with idiopathic PD was unchanged. Innovative enzymatic quantitative trait locus (xQTL) analysis revealed a negative linear association between residual β-glucocerebrosidase activity and mutation type with p < 0.0001. For each increment in the severity of mutation type, a reduction of mean β-glucocerebrosidase activity by 0.85 μmol/L/h (95% confidence interval, -1.17, -0.54) was predicted. In a first longitudinal analysis, increasing mutation severity types were prospectively associated with steeper declines in β-glucocerebrosidase activity during a median 2 years of follow-up (p = 0.02). CONCLUSIONS Residual activity of the β-glucocerebrosidase enzyme measured in blood inversely correlates with clinical severity types of GBA mutations in PD. β-Glucocerebrosidase activity is a quantitative endophenotype that can be monitored noninvasively and targeted therapeutically.
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Affiliation(s)
- Young Eun Huh
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Ming Sum Ruby Chiang
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Joseph J Locascio
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Zhixiang Liao
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Ganqiang Liu
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Karbi Choudhury
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Yuliya I Kuras
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Idil Tuncali
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Aleksandar Videnovic
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Ann L Hunt
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Michael A Schwarzschild
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Albert Y Hung
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Todd M Herrington
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Michael T Hayes
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Bradley T Hyman
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Anne-Marie Wills
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Stephen N Gomperts
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - John H Growdon
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Sergio Pablo Sardi
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston
| | - Clemens R Scherzer
- From the APDA Center for Advanced Parkinson Research (Y.E.H., J.J.L., Z.L., G.L., K.C., Y.I.K., I.T., M.T.H., C.R.S.) and Precision Neurology Program (Y.E.H., Z.L., G.L., Y.I.K., C.R.S.), Harvard Medical School, and Department of Neurology (Y.E.H., G.L., C.R.S.), Brigham and Women's Hospital, Boston, MA; Department of Neurology (Y.E.H.), CHA Bundang Medical Center, CHA University, Seongnam, Korea; Rare and Neurological Diseases Therapeutic Area (M.S.R.C., S.P.S.), Sanofi, Framingham, MA; School of Medicine (G.L.), Sun Yat-Sen University, Guangzhou, Guangdong, China; and Department of Neurology (J.J.L., A.V., A.L.H., M.A.S., A.Y.H., T.M.H., B.T.H., A.-M.W., S.N.G., J.H.G., C.R.S.), Massachusetts General Hospital, Boston.
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Mullin S, Smith L, Lee K, D'Souza G, Woodgate P, Elflein J, Hällqvist J, Toffoli M, Streeter A, Hosking J, Heywood WE, Khengar R, Campbell P, Hehir J, Cable S, Mills K, Zetterberg H, Limousin P, Libri V, Foltynie T, Schapira AHV. Ambroxol for the Treatment of Patients With Parkinson Disease With and Without Glucocerebrosidase Gene Mutations: A Nonrandomized, Noncontrolled Trial. JAMA Neurol 2020; 77:427-434. [PMID: 31930374 PMCID: PMC6990847 DOI: 10.1001/jamaneurol.2019.4611] [Citation(s) in RCA: 190] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Question Does ambroxol cross the blood-brain barrier, and what are the biochemical changes associated with ambroxol therapy in patients with Parkinson disease with and without glucocerebrosidase gene mutations? Findings In this open-label clinical trial of 17 patients with Parkinson disease, ambroxol crossed the blood-brain barrier and bound to the β-glucocerebrosidase enzyme, and it increased β-glucocerebrosidase enzyme protein levels and cerebrospinal fluid α-synuclein levels in patients both with and without glucocerebrosidase gene mutations. Meaning Ambroxol therapy has potential for study as a neuroprotective compound for the treatment of patients with Parkinson disease both with and without glucocerebrosidase gene mutations. Importance Mutations of the glucocerebrosidase gene, GBA1 (OMIM 606463), are the most important risk factor for Parkinson disease (PD). In vitro and in vivo studies have reported that ambroxol increases β-glucocerebrosidase (GCase) enzyme activity and reduces α-synuclein levels. These observations support a potential role for ambroxol therapy in modifying a relevant pathogenetic pathway in PD. Objective To assess safety, tolerability, cerebrospinal fluid (CSF) penetration, and target engagement of ambroxol therapy with GCase in patients with PD with and without GBA1 mutations. Interventions An escalating dose of oral ambroxol to 1.26 g per day. Design, Setting, and Participants This single-center open-label noncontrolled clinical trial was conducted between January 11, 2017, and April 25, 2018, at the Leonard Wolfson Experimental Neuroscience Centre, a dedicated clinical research facility and part of the University College London Queen Square Institute of Neurology in London, United Kingdom. Participants were recruited from established databases at the Royal Free London Hospital and National Hospital for Neurology and Neurosurgery in London. Twenty-four patients with moderate PD were evaluated for eligibility, and 23 entered the study. Of those, 18 patients completed the study; 1 patient was excluded (failed lumbar puncture), and 4 patients withdrew (predominantly lumbar puncture–related complications). All data analyses were performed from November 1 to December 14, 2018. Main Outcomes and Measures Primary outcomes at 186 days were the detection of ambroxol in the CSF and a change in CSF GCase activity. Results Of the 18 participants (15 men [83.3%]; mean [SD] age, 60.2 [9.7] years) who completed the study, 17 (8 with GBA1 mutations and 9 without GBA1 mutations) were included in the primary analysis. Between days 0 and 186, a 156-ng/mL increase in the level of ambroxol in CSF (lower 95% confidence limit, 129 ng/mL; P < .001) was observed. The CSF GCase activity decreased by 19% (0.059 nmol/mL per hour; 95% CI, –0.115 to –0.002; P = .04). The ambroxol therapy was well tolerated, with no serious adverse events. An increase of 50 pg/mL (13%) in the CSF α-synuclein concentration (95% CI, 14-87; P = .01) and an increase of 88 ng/mol (35%) in the CSF GCase protein levels (95% CI, 40-137; P = .002) were observed. Mean (SD) scores on part 3 of the Movement Disorders Society Unified Parkinson Disease Rating Scale decreased (ie, improved) by 6.8 (7.1) points (95% CI, –10.4 to –3.1; P = .001). These changes were observed in patients with and without GBA1 mutations. Conclusions and Relevance The study results suggest that ambroxol therapy was safe and well tolerated; CSF penetration and target engagement of ambroxol were achieved, and CSF α-synuclein levels were increased. Placebo-controlled clinical trials are needed to examine whether ambroxol therapy is associated with changes in the natural progression of PD. Trial Registration ClinicalTrials.gov identifier: NCT02941822; EudraCT identifier: 2015-002571-24
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Affiliation(s)
- Stephen Mullin
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom.,Institute of Translational and Stratified Medicine, University of Plymouth School of Medicine, Plymouth, United Kingdom
| | - Laura Smith
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Katherine Lee
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Gayle D'Souza
- NIHR UCLH Clinical Research Facility, University College London Hospitals NHS Foundation Trust, London, United Kingdom
| | - Philip Woodgate
- NIHR UCLH Clinical Research Facility, University College London Hospitals NHS Foundation Trust, London, United Kingdom
| | - Josh Elflein
- NIHR UCLH Clinical Research Facility, University College London Hospitals NHS Foundation Trust, London, United Kingdom
| | - Jenny Hällqvist
- Translational Mass Spectrometry Research Group, University College London Institute of Child Health, London, United Kingdom
| | - Marco Toffoli
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Adam Streeter
- Department of Medical Statistics, University of Plymouth School of Medicine, Plymouth, United Kingdom
| | - Joanne Hosking
- Department of Medical Statistics, University of Plymouth School of Medicine, Plymouth, United Kingdom
| | - Wendy E Heywood
- Translational Mass Spectrometry Research Group, University College London Institute of Child Health, London, United Kingdom
| | - Rajeshree Khengar
- NIHR UCLH Clinical Research Facility, University College London Hospitals NHS Foundation Trust, London, United Kingdom
| | - Philip Campbell
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Jason Hehir
- Neurogenetics Unit, National Hospital for Neurology and Neurosurgery, UCLH NHS Foundation Trust, London, United Kingdom
| | - Sarah Cable
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Kevin Mills
- Translational Mass Spectrometry Research Group, University College London Institute of Child Health, London, United Kingdom
| | - Henrik Zetterberg
- Department of Neurodegenerative Disease, University College London Institute of Neurology, London, United Kingdom.,UK Dementia Research Institute at University College London, London, United Kingdom.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Molndal, Sweden.,Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy, University of Gothenburg, Molndal, Sweden
| | - Patricia Limousin
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Vincenzo Libri
- NIHR UCLH Clinical Research Facility, University College London Hospitals NHS Foundation Trust, London, United Kingdom
| | - Tom Foltynie
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
| | - Anthony H V Schapira
- Department of Clinical and Movement Neurosciences, University College London Institute of Neurology, London, United Kingdom
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Increased α-synuclein oligomerization is associated with decreased activity of glucocerebrosidase in the aging human striatum and hippocampus. Neurosci Lett 2020; 733:135093. [PMID: 32470554 DOI: 10.1016/j.neulet.2020.135093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 01/16/2023]
Abstract
Aging is associated with an increased risk for Parkinson's disease and dementia with Lewy bodies, in which α-synuclein (α-syn) oligomerization plays key pathogenic roles. Here, we show that oligomeric α-syn levels increase with age in the human brain and are accompanied by a decrease in the activity of glucocerebrosidase (GCase), a lysosomal enzyme whose dysfunction is linked to the accumulation of oligomeric α-syn. The inverse relationship between oligomeric α-syn levels and GCase activity was more evident in brain regions susceptible to neurodegeneration (i.e., the striatum and hippocampus) than those that are less vulnerable (i.e., the cerebellum and occipital cortex). GCase could potentially regulate α-syn oligomerization, as demonstrated by the decrease in oligomeric α-syn levels caused by a GCase agonist. In vitro experiments showed that GCase activity was more potently inhibited by oligomeric than monomeric α-syn in the lysosome-enriched fractions isolated from brain tissues and cultured neuronal cells. Alterations in oligomeric α-syns and their association with GCase in aging brains may explain the vulnerability of certain brain regions to neurodegeneration in Parkinson's disease and dementia with Lewy bodies.
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Han TU, Sam R, Sidransky E. Small Molecule Chaperones for the Treatment of Gaucher Disease and GBA1-Associated Parkinson Disease. Front Cell Dev Biol 2020; 8:271. [PMID: 32509770 PMCID: PMC7248408 DOI: 10.3389/fcell.2020.00271] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Accepted: 03/30/2020] [Indexed: 12/15/2022] Open
Abstract
Parkinson disease, the second most common movement disorder, is a complex neurodegenerative disorder hallmarked by the accumulation of alpha-synuclein, a neural-specific small protein associated with neuronal synapses. Mutations in the glucocerebrosidase gene (GBA1), implicated in the rare, autosomal recessive lysosomal disorder Gaucher disease, are the most common known genetic risk factor for Parkinson disease. Insights into the inverse relationship between glucocerebrosidase and alpha-synuclein have led to new therapeutic approaches for the treatment of Gaucher disease and GBA1-associated Parkinson disease. Unlike the current drugs used to treat Gaucher disease, which are highly expensive and do not cross the blood-brain-barrier, new small molecules therapies, including competitive and non-competitive chaperones that enhance glucocerebrosidase levels are being developed to overcome these limitations. Some of these include iminosugars, ambroxol, other competitive glucocerebrosidase inhibitors, and non-inhibitory chaperones or activators that do not compete for the active site. These drugs, which have been shown in different disease models to increase glucocerebrosidase activity, could have potential as a therapy for Gaucher disease and GBA1- associated Parkinson disease. Some have been demonstrated to reduce α-synuclein levels in pre-clinical studies using cell-based or animal models of GBA1-associated Parkinson disease, and may also have utility for idiopathic Parkinson disease.
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Affiliation(s)
- Tae-Un Han
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Richard Sam
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
| | - Ellen Sidransky
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, United States
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Chen Y, Sam R, Sharma P, Chen L, Do J, Sidransky E. Glucocerebrosidase as a therapeutic target for Parkinson's disease. Expert Opin Ther Targets 2020; 24:287-294. [PMID: 32106725 PMCID: PMC7113099 DOI: 10.1080/14728222.2020.1733970] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 02/20/2020] [Indexed: 12/21/2022]
Abstract
Introduction: The association between Gaucher disease, caused by the inherited deficiency of glucocerebrosidase, and Parkinson's disease was first recognized in the clinic, noting that patients with Gaucher disease and their carrier relatives had an increased incidence of Parkinson's disease. Currently, mutations in glucocerebrosidase (GBA1) are the most common genetic risk factor for Parkinson's disease and dementia with Lewy bodies, with an inverse relationship between glucocerebrosidase and α-synuclein, a key factor in Parkinson pathogenesis. The hypothesis that therapeutic enhancement of brain glucocerebrosidase levels might reduce the aggregation, accumulation or spread of α-synuclein has spurred great interest in glucocerebrosidase as a novel therapeutic target.Area covered: This article explores the potential molecular mechanisms underlying the association between GBA1 mutations and Parkinson's disease and outlines therapeutic strategies to increase brain glucocerebrosidase, including gene therapy, targeted delivery of recombinant glucocerebrosidase to the brain, small-molecule chaperones to rescue mutant glucocerebrosidase, and small-molecule modulators to activate wild-type glucocerebrosidase.Expert opinion: Although an improved understanding of the mechanistic basis for GBA1-associated parkinsonism is essential, enhancing levels of brain glucocerebrosidase may have wide therapeutic implications. While gene therapy may ultimately be effective, less expensive and invasive small-molecule non-inhibitory chaperones or activators could significantly impact the disease course.
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Affiliation(s)
- Yu Chen
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Richard Sam
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Pankaj Sharma
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Lu Chen
- National Center for Advancing Translational Sciences, National Institutes of Health, Rockville, Maryland, USA
| | - Jenny Do
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Ellen Sidransky
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
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Glucocerebrosidase: Functions in and Beyond the Lysosome. J Clin Med 2020; 9:jcm9030736. [PMID: 32182893 PMCID: PMC7141376 DOI: 10.3390/jcm9030736] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 02/07/2023] Open
Abstract
Glucocerebrosidase (GCase) is a retaining β-glucosidase with acid pH optimum metabolizing the glycosphingolipid glucosylceramide (GlcCer) to ceramide and glucose. Inherited deficiency of GCase causes the lysosomal storage disorder named Gaucher disease (GD). In GCase-deficient GD patients the accumulation of GlcCer in lysosomes of tissue macrophages is prominent. Based on the above, the key function of GCase as lysosomal hydrolase is well recognized, however it has become apparent that GCase fulfills in the human body at least one other key function beyond lysosomes. Crucially, GCase generates ceramides from GlcCer molecules in the outer part of the skin, a process essential for optimal skin barrier property and survival. This review covers the functions of GCase in and beyond lysosomes and also pays attention to the increasing insight in hitherto unexpected catalytic versatility of the enzyme.
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Toffoli M, Smith L, Schapira AHV. The biochemical basis of interactions between Glucocerebrosidase and alpha-synuclein in GBA1 mutation carriers. J Neurochem 2020; 154:11-24. [PMID: 31965564 DOI: 10.1111/jnc.14968] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 12/11/2022]
Abstract
The discovery of genes involved in familial as well as sporadic forms of Parkinson disease (PD) constitutes an important milestone in understanding this disorder's pathophysiology and potential treatment. Among these genes, GBA1 is one of the most common and well-studied, but it is still unclear how mutations in GBA1 translate into an increased risk for developing PD. In this review, we provide an overview of the biochemical and structural relationship between GBA1 and PD to help understand the recent advances in the development of PD therapies intended to target this pathway.
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Affiliation(s)
- Marco Toffoli
- Department of Clinical and Movement Neurosciences, University College London Queen Square Institute of Neurology, London, UK
| | - Laura Smith
- Department of Clinical and Movement Neurosciences, University College London Queen Square Institute of Neurology, London, UK
| | - Anthony H V Schapira
- Department of Clinical and Movement Neurosciences, University College London Queen Square Institute of Neurology, London, UK
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Lázaro DF, Outeiro TF. The Interplay Between Proteostasis Systems and Parkinson’s Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1233:223-236. [DOI: 10.1007/978-3-030-38266-7_9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Bellomo G, Paciotti S, Gatticchi L, Parnetti L. The Vicious Cycle Between
α
‐Synuclein Aggregation and Autophagic‐Lysosomal Dysfunction. Mov Disord 2019; 35:34-44. [DOI: 10.1002/mds.27895] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/31/2019] [Accepted: 09/27/2019] [Indexed: 12/13/2022] Open
Affiliation(s)
- Giovanni Bellomo
- Magnetic Resonance Center (CERM) University of Florence Sesto Fiorentino (FI) Italy
| | - Silvia Paciotti
- Laboratory of Clinical Neurochemistry, Section of Neurology University of Perugia Perugia (PG) Italy
- Department of Experimental Medicine University of Perugia Perugia (PG) Italy
| | - Leonardo Gatticchi
- Department of Experimental Medicine University of Perugia Perugia (PG) Italy
| | - Lucilla Parnetti
- Laboratory of Clinical Neurochemistry, Section of Neurology University of Perugia Perugia (PG) Italy
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Huebecker M, Moloney EB, van der Spoel AC, Priestman DA, Isacson O, Hallett PJ, Platt FM. Reduced sphingolipid hydrolase activities, substrate accumulation and ganglioside decline in Parkinson's disease. Mol Neurodegener 2019; 14:40. [PMID: 31703585 PMCID: PMC6842240 DOI: 10.1186/s13024-019-0339-z] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 09/20/2019] [Indexed: 12/20/2022] Open
Abstract
Background Haploinsufficiency in the Gaucher disease GBA gene, which encodes the lysosomal glucocerebrosidase GBA, and ageing represent major risk factors for developing Parkinson’s disease (PD). Recently, more than fifty other lysosomal storage disorder gene variants have been identified in PD, implicating lysosomal dysfunction more broadly as a key risk factor for PD. Despite the evidence of multiple lysosomal genetic risks, it remains unclear how sphingolipid hydrolase activities, other than GBA, are altered with ageing or in PD. Moreover, it is not fully known if levels of glycosphingolipid substrates for these enzymes change in vulnerable brain regions of PD. Finally, little is known about the levels of complex gangliosides in substantia nigra which may play a significant role in ageing and PD. Methods To study sphingolipid hydrolase activities and glycosphingolipid expression in ageing and in PD, two independent cohorts of human substantia nigra tissues were obtained. Fluorescent 4-methylumbelliferone assays were used to determine multiple enzyme activities. The lysosomal GBA and non-lysosomal GBA2 activities were distinguished using the inhibitor NB-DGJ. Sensitive and quantitative normal-phase HPLC was performed to study glycosphingolipid levels. In addition, glycosphingolipid levels in cerebrospinal fluid and serum were analysed as possible biomarkers for PD. Results The present study demonstrates, in two independent cohorts of human post-mortem substantia nigra, that sporadic PD is associated with deficiencies in multiple lysosomal hydrolases (e.g. α-galactosidase and β-hexosaminidase), in addition to reduced GBA and GBA2 activities and concomitant glycosphingolipid substrate accumulation. Furthermore, the data show significant reductions in levels of complex gangliosides (e.g. GM1a) in substantia nigra, CSF and serum in ageing, PD, and REM sleep behaviour disorder, which is a strong predictor of PD. Conclusions These findings conclusively demonstrate reductions in GBA activity in the parkinsonian midbrain, and for the first time, reductions in the activity of several other sphingolipid hydrolases. Furthermore, significant reductions were seen in complex gangliosides in PD and ageing. The diminished activities of these lysosomal hydrolases, the glycosphingolipid substrate accumulation, and the reduced levels of complex gangliosides are likely major contributors to the primary development of the pathology seen in PD and related disorders with age.
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Affiliation(s)
- Mylene Huebecker
- Department of Pharmacology, University of Oxford, Oxford, OX1 3QT, UK
| | - Elizabeth B Moloney
- Neuroregeneration Institute, McLean Hospital / Harvard Medical School, Belmont, MA, 02478, USA
| | - Aarnoud C van der Spoel
- Departments of Pediatrics and Biochemistry & Molecular Biology, Atlantic Research Centre, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - David A Priestman
- Department of Pharmacology, University of Oxford, Oxford, OX1 3QT, UK
| | - Ole Isacson
- Neuroregeneration Institute, McLean Hospital / Harvard Medical School, Belmont, MA, 02478, USA.
| | - Penelope J Hallett
- Neuroregeneration Institute, McLean Hospital / Harvard Medical School, Belmont, MA, 02478, USA.
| | - Frances M Platt
- Department of Pharmacology, University of Oxford, Oxford, OX1 3QT, UK.
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Neurorestorative effects of sub-chronic administration of ambroxol in rodent model of Parkinson’s disease. Naunyn Schmiedebergs Arch Pharmacol 2019; 393:429-444. [DOI: 10.1007/s00210-019-01737-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 09/20/2019] [Indexed: 02/07/2023]
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Do J, McKinney C, Sharma P, Sidransky E. Glucocerebrosidase and its relevance to Parkinson disease. Mol Neurodegener 2019; 14:36. [PMID: 31464647 PMCID: PMC6716912 DOI: 10.1186/s13024-019-0336-2] [Citation(s) in RCA: 175] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 08/12/2019] [Indexed: 02/07/2023] Open
Abstract
Mutations in GBA1, the gene encoding the lysosomal enzyme glucocerebrosidase, are among the most common known genetic risk factors for the development of Parkinson disease and related synucleinopathies. A great deal is known about GBA1, as mutations in GBA1 are causal for the rare autosomal storage disorder Gaucher disease. Over the past decades, significant progress has been made in understanding the genetics and cell biology of glucocerebrosidase. A least 495 different mutations, found throughout the 11 exons of the gene are reported, including both common and rare variants. Mutations in GBA1 may lead to degradation of the protein, disruptions in lysosomal targeting and diminished performance of the enzyme in the lysosome. Gaucher disease is phenotypically diverse and has both neuronopathic and non-neuronopathic forms. Both patients with Gaucher disease and heterozygous carriers are at increased risk of developing Parkinson disease and Dementia with Lewy Bodies, although our understanding of the mechanism for this association remains incomplete. There appears to be an inverse relationship between glucocerebrosidase and α-synuclein levels, and even patients with sporadic Parkinson disease have decreased glucocerebrosidase. Glucocerebrosidase may interact with α-synuclein to maintain basic cellular functions, or impaired glucocerebrosidase could contribute to Parkinson pathogenesis by disrupting lysosomal homeostasis, enhancing endoplasmic reticulum stress or contributing to mitochondrial impairment. However, the majority of patients with GBA1 mutations never develop parkinsonism, so clearly other risk factors play a role. Treatments for Gaucher disease have been developed that increase visceral glucocerebrosidase levels and decrease lipid storage, although they have yet to properly address the neurological defects associated with impaired glucocerebrosidase. Mouse and induced pluripotent stem cell derived models have improved our understanding of glucocerebrosidase function and the consequences of its deficiency. These models have been used to test novel therapies including chaperone proteins, histone deacetylase inhibitors, and gene therapy approaches that enhance glucocerebrosidase levels and could prove efficacious in the treatment of forms of parkinsonism. Consequently, this rare monogenic disorder, Gaucher disease, provides unique insights directly applicable to our understanding and treatment of Parkinson disease, a common and complex neurodegenerative disorder.
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Affiliation(s)
- Jenny Do
- Section on Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35A, Room 1E623, 35 Convent Drive, MSC 3708, Bethesda, MD, 20892-3708, USA
| | - Cindy McKinney
- Section on Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35A, Room 1E623, 35 Convent Drive, MSC 3708, Bethesda, MD, 20892-3708, USA
| | - Pankaj Sharma
- Section on Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35A, Room 1E623, 35 Convent Drive, MSC 3708, Bethesda, MD, 20892-3708, USA
| | - Ellen Sidransky
- Section on Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35A, Room 1E623, 35 Convent Drive, MSC 3708, Bethesda, MD, 20892-3708, USA.
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Farfel-Becker T, Do J, Tayebi N, Sidransky E. Can GBA1-Associated Parkinson Disease Be Modeled in the Mouse? Trends Neurosci 2019; 42:631-643. [PMID: 31288942 DOI: 10.1016/j.tins.2019.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/21/2019] [Accepted: 05/31/2019] [Indexed: 02/06/2023]
Abstract
Homozygous and heterozygous mutations in GBA1, the gene implicated in Gaucher disease, increase the risk and severity of Parkinson disease (PD). We evaluated the design, phenotype, strengths, and limitations of current GBA1-associated PD mouse models. Although faithful modeling of a genetic risk factor poses many challenges, the different approaches taken were successful in revealing predisposing abnormalities in heterozygotes for GBA1 mutations and demonstrating the deleterious effects of GBA1 impairment on the PD course in PD models. GBA1-PD models differ in key parameters, with no single model recapitulating all aspects of the GBA1-PD puzzle, emphasizing the importance of selecting the proper in vivo model depending on the specific molecular mechanism or potential therapy being studied.
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Affiliation(s)
- Tamar Farfel-Becker
- Synaptic Function Section, The Porter Neuroscience Research Center, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-3706, USA.
| | - Jenny Do
- Section of Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-3708, USA
| | - Nahid Tayebi
- Section of Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-3708, USA
| | - Ellen Sidransky
- Section of Molecular Neurogenetics, Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-3708, USA.
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Identification of N-linked glycans as specific mediators of neuronal uptake of acetylated α-Synuclein. PLoS Biol 2019; 17:e3000318. [PMID: 31211781 PMCID: PMC6599126 DOI: 10.1371/journal.pbio.3000318] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/28/2019] [Accepted: 05/28/2019] [Indexed: 11/19/2022] Open
Abstract
Cell-to-cell transmission of toxic forms of α-Synuclein (αS) is thought to underlie disease progression in Parkinson disease. αS in humans is constitutively N-terminally acetylated (αSacetyl), although the impact of this modification is relatively unexplored. Here, we report that αSacetyl is more effective at inducing intracellular aggregation in primary neurons than unmodified αS (αSun). We identify complex N-linked glycans as binding partners for αSacetyl and demonstrate that cellular internalization of αSacetyl is reduced significantly upon cleavage of extracellular N-linked glycans, but not other carbohydrates. We verify binding of αSacetyl to N-linked glycans in vitro, using both isolated glycans and cell-derived proteoliposomes. Finally, we identify neurexin 1β, a neuronal glycoprotein, as capable of driving glycan-dependent uptake of αSacetyl. Importantly, our results are specific to αSacetyl because αSun does not demonstrate sensitivity for N-linked glycans in any of our assays. Our study identifies extracellular N-linked glycans—and the glycoprotein neurexin 1β specifically—as key modulators of neuronal uptake of αSacetyl, drawing attention to the potential therapeutic value of αSacetyl-glycan interactions. This study identifies extracellular N-linked glycans — and the glycoprotein neurexin 1β — as key modulators of neuronal uptake of N-terminally acetylated α-Synuclein, emphasising the potential therapeutic value of α-Synuclein-glycan interactions.
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48
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Arotcarena ML, Teil M, Dehay B. Autophagy in Synucleinopathy: The Overwhelmed and Defective Machinery. Cells 2019; 8:cells8060565. [PMID: 31181865 PMCID: PMC6627933 DOI: 10.3390/cells8060565] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/06/2019] [Accepted: 06/08/2019] [Indexed: 02/07/2023] Open
Abstract
Alpha-synuclein positive-intracytoplasmic inclusions are the common denominators of the synucleinopathies present as Lewy bodies in Parkinson’s disease, dementia with Lewy bodies, or glial cytoplasmic inclusions in multiple system atrophy. These neurodegenerative diseases also exhibit cellular dyshomeostasis, such as autophagy impairment. Several decades of research have questioned the potential link between the autophagy machinery and alpha-synuclein protein toxicity in synucleinopathy and neurodegenerative processes. Here, we aimed to discuss the active participation of autophagy impairment in alpha-synuclein accumulation and propagation, as well as alpha-synuclein-independent neurodegenerative processes in the field of synucleinopathy. Therapeutic approaches targeting the restoration of autophagy have started to emerge as relevant strategies to reverse pathological features in synucleinopathies.
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Affiliation(s)
- Marie-Laure Arotcarena
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
| | - Margaux Teil
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
| | - Benjamin Dehay
- Univ. de Bordeaux, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
- CNRS, Institut des Maladies Neurodégénératives, UMR 5293, F-33000 Bordeaux, France.
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49
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McGlinchey RP, Lacy SM, Huffer KE, Tayebi N, Sidransky E, Lee JC. C-terminal α-synuclein truncations are linked to cysteine cathepsin activity in Parkinson's disease. J Biol Chem 2019; 294:9973-9984. [PMID: 31092553 PMCID: PMC6597809 DOI: 10.1074/jbc.ra119.008930] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/09/2019] [Indexed: 01/11/2023] Open
Abstract
A pathological feature of Parkinson's disease (PD) is Lewy bodies (LBs) composed of α-synuclein (α-syn) amyloid fibrils. α-Syn is a 140 amino acids-long protein, but truncated α-syn is enriched in LBs. The proteolytic processes that generate these truncations are not well-understood. On the basis of our previous work, we propose that these truncations could originate from lysosomal activity attributable to cysteine cathepsins (Cts). Here, using a transgenic SNCA A53T mouse model, overexpressing the PD-associated α-syn variant A53T, we compared levels of α-syn species in purified brain lysosomes from nonsymptomatic mice with those in age-matched symptomatic mice. In the symptomatic mice, antibody epitope mapping revealed enrichment of C-terminal truncations, resulting from CtsB, CtsL, and asparagine endopeptidase. We did not observe changes in individual cathepsin activities, suggesting that the increased levels of C-terminal α-syn truncations are because of the burden of aggregated α-syn. Using LC-MS and purified α-syn, we identified C-terminal truncations corresponding to amino acids 1-122 and 1-90 from the SNCA A53T lysosomes. Feeding rat dopaminergic N27 cells with exogenous α-syn fibrils confirmed that these fragments originate from incomplete fibril degradation in lysosomes. We mimicked these events in situ by asparagine endopeptidase degradation of α-syn fibrils. Importantly, the resulting C-terminally truncated fibrils acted as superior seeds in stimulating α-syn aggregation compared with that of the full-length fibrils. These results unequivocally show that C-terminal α-syn truncations in LBs are linked to Cts activities, promote amyloid formation, and contribute to PD pathogenesis.
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Affiliation(s)
- Ryan P McGlinchey
- From the Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute and
| | - Shannon M Lacy
- From the Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute and
| | - Katherine E Huffer
- From the Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute and
| | - Nahid Tayebi
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Ellen Sidransky
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland 20892
| | - Jennifer C Lee
- From the Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute and
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50
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Monzani E, Nicolis S, Dell'Acqua S, Capucciati A, Bacchella C, Zucca FA, Mosharov EV, Sulzer D, Zecca L, Casella L. Dopamin, oxidativer Stress und Protein‐Chinonmodifikationen bei Parkinson und anderen neurodegenerativen Erkrankungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Enrico Monzani
- Department of ChemistryUniversity of Pavia 27100 Pavia Italien
| | | | | | | | | | - Fabio A. Zucca
- Institute of Biomedical TechnologiesNational Research Council of Italy Segrate (Mailand) Italien
| | - Eugene V. Mosharov
- Department of PsychiatryColumbia University Medical CenterNew York State Psychiatric Institute New York NY USA
- Departments Neurology, PharmacologyColumbia University Medical Center New York NY USA
| | - David Sulzer
- Department of PsychiatryColumbia University Medical CenterNew York State Psychiatric Institute New York NY USA
- Departments Neurology, PharmacologyColumbia University Medical Center New York NY USA
| | - Luigi Zecca
- Institute of Biomedical TechnologiesNational Research Council of Italy Segrate (Mailand) Italien
- Department of PsychiatryColumbia University Medical CenterNew York State Psychiatric Institute New York NY USA
| | - Luigi Casella
- Department of ChemistryUniversity of Pavia 27100 Pavia Italien
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