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Kamano S, Ozawa D, Ikenaka K, Nagai Y. Role of Lipids in the Pathogenesis of Parkinson's Disease. Int J Mol Sci 2024; 25:8935. [PMID: 39201619 PMCID: PMC11354291 DOI: 10.3390/ijms25168935] [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: 07/08/2024] [Revised: 08/07/2024] [Accepted: 08/10/2024] [Indexed: 09/02/2024] Open
Abstract
Aggregation of α-synuclein (αSyn) and its accumulation as Lewy bodies play a central role in the pathogenesis of Parkinson's disease (PD). However, the mechanism by which αSyn aggregates in the brain remains unclear. Biochemical studies have demonstrated that αSyn interacts with lipids, and these interactions affect the aggregation process of αSyn. Furthermore, genetic studies have identified mutations in lipid metabolism-associated genes such as glucocerebrosidase 1 (GBA1) and synaptojanin 1 (SYNJ1) in sporadic and familial forms of PD, respectively. In this review, we focus on the role of lipids in triggering αSyn aggregation in the pathogenesis of PD and propose the possibility of modulating the interaction of lipids with αSyn as a potential therapy for PD.
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Grants
- 24H00630 Ministry of Education, Culture, Sports, Science and Technology
- 21H02840 Ministry of Education, Culture, Sports, Science and Technology
- 17K19658 Ministry of Education, Culture, Sports, Science and Technology
- 20H05927 Ministry of Education, Culture, Sports, Science and Technology
- JP16ek0109018 Japan Agency for Medical Research and Development
- JP19ek0109222 Japan Agency for Medical Research and Development
- 30-3 National Center of Neurology and Psychiatry
- 30-9 National Center of Neurology and Psychiatry
- 3-9 National Center of Neurology and Psychiatry
- 6-9 National Center of Neurology and Psychiatry
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Affiliation(s)
- Shumpei Kamano
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Osaka, Japan; (S.K.); (D.O.)
| | - Daisaku Ozawa
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Osaka, Japan; (S.K.); (D.O.)
| | - Kensuke Ikenaka
- Department of Neurology, Osaka University Graduate School of Medicine, Suita 565-0871, Osaka, Japan;
| | - Yoshitaka Nagai
- Department of Neurology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Osaka, Japan; (S.K.); (D.O.)
- Life Science Research Institute, Kindai University, Osaka-Sayama 589-8511, Osaka, Japan
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2
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Zhang L, Illes-Toth E, Cryar A, Drinkwater G, Di Vagno L, Pons ML, Mateyka J, McCullough B, Achtar E, Clarkson C, Göschel L, Körtvélyessy P, Mussell C, Hopley CJ, Flöel A, Hirtz C, Lehmann S, Quaglia M. A candidate reference measurement procedure for the quantification of α-synuclein in cerebrospinal fluid using an SI traceable primary calibrator and multiple reaction monitoring. Analyst 2024. [PMID: 39041602 DOI: 10.1039/d4an00634h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
α-synuclein aggregation is an important hallmark of neurodegenerative diseases such as Parkinson's disease (PD) and Lewy body dementia. α-synuclein has been increasingly used as a diagnostic biomarker in PD and other synucleinopathies. Current clinical assays rely on antibody-based immunoassays to detect α-synuclein, which possess high sensitivity, afford high throughput and require small sample volumes. The utility of these assays, however, may be compounded by the specificity, selectivity and batch-to-batch heterogeneity of the antibody used, which can lead to deviations in the total amount of the protein measured when comparing results among different laboratories. Similarly, current mass spectrometry-based quantification methods for α-synuclein lack well-defined, value assigned calibrators to ensure comparability of measurements. Therefore, there is still an unmet need for the standardisation of clinical measurements for α-synuclein that can be achieved by the development of reference measurement procedures (RMPs) utilising calibrators traceable to the SI (International System of Units). Here, we report a candidate RMP for α-synuclein, using an SI traceable primary calibrator and an isotope dilution mass spectrometry (IDMS) approach to address this need. The gravimetrically prepared primary calibrator was traceably quantified utilising a combination of amino acid analysis (AAA) and quantitative nuclear magnetic resonance (qNMR) for value assignment. An optimised targeted sample clean-up procedure involving a non-denaturing Lys-C digestion and solid-phase extraction strategy was devised, followed by the development of a targeted multiple reaction monitoring (MRM) method for the quantification of α-synuclein in cerebrospinal fluid (CSF). This candidate RMP was then deployed for the sensitive detection and accurate quantification of multiple proteotypic α-synuclein peptides in patient derived CSF samples. The LC-MS based results were subsequently compared to immunoassay data to assess the overall performance of our approach. The development and adoption of this candidate RMP, along with the availability of the SI traceable primary calibrator will allow for reliable quantifications of α-synuclein in CSF by an LC-MS based assay. The RMP will potentially contribute towards the standardisation of this important biomarker and may lead to future interlaboratory comparisons.
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Affiliation(s)
- Leran Zhang
- LGC Group, Queens Road, TW11 0LY Teddington, UK.
| | | | - Adam Cryar
- LGC Group, Queens Road, TW11 0LY Teddington, UK.
| | | | | | - Marie-Laure Pons
- LBPC-PPC, Univ Montpellier, IRMB CHU Montpellier, INM INSERM, 34295 Montpellier, France
| | | | | | - Eli Achtar
- LGC Group, Queens Road, TW11 0LY Teddington, UK.
| | | | - Laura Göschel
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Neurology, 10117 Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Neuroscience Clinical Research Center, 10117 Berlin, Germany
| | - Peter Körtvélyessy
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Neurology, 10117 Berlin, Germany
- Labor Berlin, Innovations, Sylter Strasse 2, 13353 Berlin, Germany
| | | | | | - Agnes Flöel
- Department of Neurology, Universitätsmedizin Greifswald, 17475 Greifswald, Germany
| | - Christophe Hirtz
- LBPC-PPC, Univ Montpellier, IRMB CHU Montpellier, INM INSERM, 34295 Montpellier, France
| | - Sylvain Lehmann
- LBPC-PPC, Univ Montpellier, IRMB CHU Montpellier, INM INSERM, 34295 Montpellier, France
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3
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Xian M, Li J, Liu T, Hou K, Sun L, Wei J. β-Synuclein Intermediates α-Synuclein Neurotoxicity in Parkinson's Disease. ACS Chem Neurosci 2024; 15:2445-2453. [PMID: 38905183 DOI: 10.1021/acschemneuro.4c00263] [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] [Indexed: 06/23/2024] Open
Abstract
Parkinson's disease (PD) is the second most common age-related neurodegenerative disease in the world, and synuclein is closely related to the onset and progression of PD. Synuclein is considered a therapeutic target for PD. Recent studies have found that abnormal aggregation of α-synuclein (α-Syn) in the brains of PD patients leads to mitochondrial dysfunction and neuroinflammation. Research in the field of neuroscience has confirmed that β-synuclein (β-Syn) also plays a role in Parkinson's disease. However, there has been little research on the role mechanisms and interactions between β-Syn and α-Syn in PD. Therefore, the purpose of this study is to clarify the relationship between α-Syn, β-Syn, and PD and to explore the roles and interactions of β-Syn and α-Syn in PD.
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Affiliation(s)
- Meiyan Xian
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, P.R. China
| | - Jingwen Li
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, P.R. China
| | - Tingting Liu
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, P.R. China
| | - Kaiying Hou
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, P.R. China
| | - Lin Sun
- College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475004, P.R. China
| | - Jianshe Wei
- Institute for Brain Sciences Research, School of Life Sciences, Henan University, Kaifeng 475004, P.R. China
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de Boni L, Wallis A, Hays Watson A, Ruiz-Riquelme A, Leyland LA, Bourinaris T, Hannaway N, Wüllner U, Peters O, Priller J, Falkenburger BH, Wiltfang J, Bähr M, Zerr I, Bürger K, Perneczky R, Teipel S, Löhle M, Hermann W, Schott BH, Brockmann K, Spottke A, Haustein K, Breuer P, Houlden H, Weil RS, Bartels T. Aggregation-resistant alpha-synuclein tetramers are reduced in the blood of Parkinson's patients. EMBO Mol Med 2024; 16:1657-1674. [PMID: 38839930 PMCID: PMC11250827 DOI: 10.1038/s44321-024-00083-5] [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: 02/05/2024] [Revised: 05/02/2024] [Accepted: 05/17/2024] [Indexed: 06/07/2024] Open
Abstract
Synucleinopathies such as Parkinson's disease (PD) are defined by the accumulation and aggregation of the α-synuclein protein in neurons, glia and other tissues. We have previously shown that destabilization of α-synuclein tetramers is associated with familial PD due to SNCA mutations and demonstrated brain-region specific alterations of α-synuclein multimers in sporadic PD patients following the classical Braak spreading theory. In this study, we assessed relative levels of disordered and higher-ordered multimeric forms of cytosolic α-synuclein in blood from familial PD with G51D mutations and sporadic PD patients. We used an adapted in vitro-cross-linking protocol for human EDTA-whole blood. The relative levels of higher-ordered α-synuclein tetramers were diminished in blood from familial PD and sporadic PD patients compared to controls. Interestingly, the relative amount of α-synuclein tetramers was already decreased in asymptomatic G51D carriers, supporting the hypothesis that α-synuclein multimer destabilization precedes the development of clinical PD. Our data, therefore suggest that measuring α-synuclein tetramers in blood may have potential as a facile biomarker assay for early detection and quantitative tracking of PD progression.
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Affiliation(s)
- Laura de Boni
- UK Dementia Research Institute, University College London, London, W1T 7NF, UK
- Institute of Aerospace Medicine, German Aerospace Center (DLR), 51147, Cologne, Germany
- Department of Neurology, University Hospital Bonn, 53127, Bonn, Germany
| | - Amber Wallis
- UK Dementia Research Institute, University College London, London, W1T 7NF, UK
| | - Aurelia Hays Watson
- UK Dementia Research Institute, University College London, London, W1T 7NF, UK
| | | | - Louise-Ann Leyland
- Dementia Research Center, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Thomas Bourinaris
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Naomi Hannaway
- Dementia Research Center, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Ullrich Wüllner
- German Center for Neurodegenerative Diseases (DZNE), 53127, Bonn, Germany
- Departments of Neurology and Neurodegenerative Diseases, University Bonn, 53127, Bonn, Germany
| | - Oliver Peters
- Institute of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 12203, Berlin, Germany
- German Center for Neurodegenerative Diseases (DZNE), 10117, Berlin, Germany
| | - Josef Priller
- German Center for Neurodegenerative Diseases (DZNE), 10117, Berlin, Germany
- Department of Psychiatry and Psychotherapy, Charité, Charitéplatz 1, 10117, Berlin, Germany
- University of Edinburgh and UK DRI, Edinburgh, EH16 4SB, UK
- School of Medicine, Technical University of Munich, Department of Psychiatry and Psychotherapy, 81675, Munich, Germany
| | - Björn H Falkenburger
- German Center for Neurodegenerative Diseases (DZNE), 01307, Dresden, Germany
- Department of Neurology, University Hospital Carl Gustav Carus, Dresden University of Technology, 01307, Dresden, Germany
| | - Jens Wiltfang
- German Center for Neurodegenerative Diseases (DZNE), 37075, Goettingen, Germany
- Department of Psychiatry and Psychotherapy, University Medical Center Goettingen, Georg August University, 37075, Göttingen, Germany
- Neurosciences and Signaling Group, Institute of Biomedicine (iBiMED), Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Mathias Bähr
- German Center for Neurodegenerative Diseases (DZNE), 37075, Goettingen, Germany
- Department of Neurology, University Medical Center, Georg August University, 37075, Göttingen, Germany
- Cluster of Excellence Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), University Medical Center Göttingen, 37075, Göttingen, Germany
| | - Inga Zerr
- German Center for Neurodegenerative Diseases (DZNE), 37075, Goettingen, Germany
- Department of Neurology, University Medical Center, Georg August University, 37075, Göttingen, Germany
| | - Katharina Bürger
- German Center for Neurodegenerative Diseases (DZNE), 81377, Munich, Germany
- Institute for Stroke and Dementia Research, University Hospital, LMU Munich, 81377, Munich, Germany
| | - Robert Perneczky
- German Center for Neurodegenerative Diseases (DZNE), 81377, Munich, Germany
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, 81377, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy) Munich, 81377, Munich, Germany
- Ageing Epidemiology Research Unit, School of Public Health, Imperial College London, London, W6 8RP, UK
| | - Stefan Teipel
- German Center for Neurodegenerative Diseases (DZNE), Rostock-Greifswald, 17489, Rostock, Germany
- Department of Psychosomatic Medicine, Rostock University Medical Center, 18147, Rostock, Germany
| | - Matthias Löhle
- German Center for Neurodegenerative Diseases (DZNE), Rostock-Greifswald, 17489, Rostock, Germany
- Department of Neurology, University of Rostock, 18057, Rostock, Germany
| | - Wiebke Hermann
- German Center for Neurodegenerative Diseases (DZNE), Rostock-Greifswald, 17489, Rostock, Germany
- Department of Neurology, University of Rostock, 18057, Rostock, Germany
| | - Björn-Hendrik Schott
- German Center for Neurodegenerative Diseases (DZNE), 37075, Goettingen, Germany
- Department of Psychiatry and Psychotherapy, University Hospital Göttingen, Georg August University, 37075, Göttingen, Germany
| | - Kathrin Brockmann
- German Center for Neurodegenerative Diseases (DZNE), 72076, Tübingen, Germany
- Hertie Institute for Clinical Brain Research, Department of Neurodegenerative Diseases, University of Tübingen, 72076, Tübingen, Germany
| | - Annika Spottke
- Department of Neurology, University Hospital Bonn, 53127, Bonn, Germany
- German Center for Neurodegenerative Diseases (DZNE), 53127, Bonn, Germany
| | - Katrin Haustein
- Department of Neurology, University Hospital Bonn, 53127, Bonn, Germany
| | - Peter Breuer
- Department of Neurology, University Hospital Bonn, 53127, Bonn, Germany
| | - Henry Houlden
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Rimona S Weil
- Dementia Research Center, Institute of Neurology, University College London, Queen Square, London, WC1N 3BG, UK
| | - Tim Bartels
- UK Dementia Research Institute, University College London, London, W1T 7NF, UK.
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Bordbar S, Alijanzadeh D, Samieefar N, Khazeei Tabari MA, Pourbakhtyaran E, Rezaei N. The Role of Alpha-Synuclein in Neurodevelopmental Diseases. Mol Neurobiol 2024:10.1007/s12035-024-04305-2. [PMID: 38949729 DOI: 10.1007/s12035-024-04305-2] [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: 07/13/2023] [Accepted: 06/11/2024] [Indexed: 07/02/2024]
Abstract
Neurodevelopmental disorders are a group of diseases with cognitive, motor, and emotional development deficits. Alpha-synuclein (α-syn) is a synaptic protein involved in transmission and neurodevelopment. This protein was previously shown to be associated with several disorders, including Parkinson's disease. Furthermore, a close link between neurodevelopmental disorders and Parkinson's has also been found. Changes in synaptic function have been noticed in neurodevelopmental disorders, including autism spectrum disorder. Impaired neurogenesis and related cognitive problems have been associated with altered expression of α-syn. Various studies reported α-syn in different body fluids and tissues such as blood and serum. Alpha-synuclein can help in better understanding the pathogenesis of neurodevelopmental diseases and facilitating their early diagnosis. This review aims to go over the recent advances in the role of α-syn in the pathophysiology of neurodevelopmental disorders, including autism spectrum disorder, attention deficit hyperactivity disorder, and motor and social impairment, and its value as a diagnostic biomarker.
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Affiliation(s)
- Sanaz Bordbar
- Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, 1417755331, Iran
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Dorsa Alijanzadeh
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- USERN Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Noosha Samieefar
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- USERN Office, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Khazeei Tabari
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran
- Student Research Committee, Mazandaran University of Medical Sciences, Sari, Iran
- USERN Office, Mazandaran University of Medical Sciences, Sari, Iran
| | - Elham Pourbakhtyaran
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Pediatric Neurology, Pediatrics Center of Excellence, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Network of Interdisciplinarity in Neonates and Infants (NINI), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
- Research Center for Immunodeficiencies, Pediatrics Center of Excellence, Children's Medical Center Hospital, Tehran University of Medical Sciences, Dr. Qarib St., Keshavarz Blvd, Tehran, 14194, Iran.
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.
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Sanluca C, Spagnolo P, Mancinelli R, De Bartolo MI, Fava M, Maccarrone M, Carotti S, Gaudio E, Leuti A, Vivacqua G. Interaction between α-Synuclein and Bioactive Lipids: Neurodegeneration, Disease Biomarkers and Emerging Therapies. Metabolites 2024; 14:352. [PMID: 39057675 PMCID: PMC11278689 DOI: 10.3390/metabo14070352] [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: 05/12/2024] [Revised: 06/10/2024] [Accepted: 06/14/2024] [Indexed: 07/28/2024] Open
Abstract
The present review provides a comprehensive examination of the intricate dynamics between α-synuclein, a protein crucially involved in the pathogenesis of several neurodegenerative diseases, including Parkinson's disease and multiple system atrophy, and endogenously-produced bioactive lipids, which play a pivotal role in neuroinflammation and neurodegeneration. The interaction of α-synuclein with bioactive lipids is emerging as a critical factor in the development and progression of neurodegenerative and neuroinflammatory diseases, offering new insights into disease mechanisms and novel perspectives in the identification of potential biomarkers and therapeutic targets. We delve into the molecular pathways through which α-synuclein interacts with biological membranes and bioactive lipids, influencing the aggregation of α-synuclein and triggering neuroinflammatory responses, highlighting the potential of bioactive lipids as biomarkers for early disease detection and progression monitoring. Moreover, we explore innovative therapeutic strategies aimed at modulating the interaction between α-synuclein and bioactive lipids, including the development of small molecules and nutritional interventions. Finally, the review addresses the significance of the gut-to-brain axis in mediating the effects of bioactive lipids on α-synuclein pathology and discusses the role of altered gut lipid metabolism and microbiota composition in neuroinflammation and neurodegeneration. The present review aims to underscore the potential of targeting α-synuclein-lipid interactions as a multifaceted approach for the detection and treatment of neurodegenerative and neuroinflammatory diseases.
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Affiliation(s)
- Chiara Sanluca
- Department of Medicine, Laboratory of Microscopic and Ultrastructural Anatomy, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy (S.C.)
- Biochemistry and Molecular Biology Unit, Department of Medicine, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy
| | - Paolo Spagnolo
- Department of Medicine, Laboratory of Microscopic and Ultrastructural Anatomy, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy (S.C.)
- Biochemistry and Molecular Biology Unit, Department of Medicine, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy
| | - Romina Mancinelli
- Department of Anatomic, Histologic, Forensic and Locomotor Apparatus Sciences, Sapienza University of Roma, 00185 Rome, Italy (E.G.)
| | | | - Marina Fava
- Biochemistry and Molecular Biology Unit, Department of Medicine, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy
- European Center for Brain Research/IRCCS Santa Lucia Foundation, Via del Fosso di Fiorano 64, 00143 Rome, Italy;
| | - Mauro Maccarrone
- European Center for Brain Research/IRCCS Santa Lucia Foundation, Via del Fosso di Fiorano 64, 00143 Rome, Italy;
- Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, 67100 L’Aquila, Italy
| | - Simone Carotti
- Department of Medicine, Laboratory of Microscopic and Ultrastructural Anatomy, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy (S.C.)
| | - Eugenio Gaudio
- Department of Anatomic, Histologic, Forensic and Locomotor Apparatus Sciences, Sapienza University of Roma, 00185 Rome, Italy (E.G.)
| | - Alessandro Leuti
- Biochemistry and Molecular Biology Unit, Department of Medicine, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy
- European Center for Brain Research/IRCCS Santa Lucia Foundation, Via del Fosso di Fiorano 64, 00143 Rome, Italy;
| | - Giorgio Vivacqua
- Department of Medicine, Laboratory of Microscopic and Ultrastructural Anatomy, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, 00128 Rome, Italy (S.C.)
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7
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Lázaro DF, Lee VMY. Navigating through the complexities of synucleinopathies: Insights into pathogenesis, heterogeneity, and future perspectives. Neuron 2024:S0896-6273(24)00364-7. [PMID: 38861985 DOI: 10.1016/j.neuron.2024.05.017] [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: 01/18/2024] [Revised: 04/22/2024] [Accepted: 05/14/2024] [Indexed: 06/13/2024]
Abstract
The aggregation of alpha-synuclein (aSyn) represents a neuropathological hallmark observed in a group of neurodegenerative disorders collectively known as synucleinopathies. Despite their shared characteristics, these disorders manifest diverse clinical and pathological phenotypes. The mechanism underlying this heterogeneity is thought to be due to the diversity in the aSyn strains present across the diseases. In this perspective, we will explore recent findings on aSyn strains and discuss recent discoveries about Lewy bodies' composition. We further discuss the current hypothesis for aSyn spreading and emphasize the emerging biomarker field demonstrating promising results. A comprehension of these mechanisms holds substantial promise for future clinical applications. This understanding can pave the way for the development of personalized medicine strategies, specifically targeting the unique underlying causes of each synucleinopathy. Such advancements can revolutionize therapeutic approaches and significantly contribute to more effective interventions in the intricate landscape of neurodegenerative disorders.
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Affiliation(s)
- Diana F Lázaro
- Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Medicine, University of Pennsylvania, Perelman School of Medicine at University of Pennsylvania, 3600 Spruce Street, 3 Maloney Building, Philadelphia, PA 19104, USA.
| | - Virginia M-Y Lee
- Department of Pathology and Laboratory Medicine, Institute on Aging and Center for Neurodegenerative Disease Research, University of Pennsylvania School of Medicine, Medicine, University of Pennsylvania, Perelman School of Medicine at University of Pennsylvania, 3600 Spruce Street, 3 Maloney Building, Philadelphia, PA 19104, USA.
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8
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Torres A, Michea MA, Végvári Á, Arce M, Pérez V, Alcota M, Morales A, Vernal R, Budini M, Zubarev RA, González FE. A multi-platform analysis of human gingival crevicular fluid reveals ferroptosis as a relevant regulated cell death mechanism during the clinical progression of periodontitis. Int J Oral Sci 2024; 16:43. [PMID: 38802345 PMCID: PMC11130186 DOI: 10.1038/s41368-024-00306-y] [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: 11/05/2023] [Revised: 04/13/2024] [Accepted: 04/16/2024] [Indexed: 05/29/2024] Open
Abstract
Ferroptosis is implicated in the pathogenesis of numerous chronic-inflammatory diseases, yet its association with progressive periodontitis remains unexplored. To investigate the involvement and significance of ferroptosis in periodontitis progression, we assessed sixteen periodontitis-diagnosed patients. Disease progression was clinically monitored over twelve weeks via weekly clinical evaluations and gingival crevicular fluid (GCF) collection was performed for further analyses. Clinical metrics, proteomic data, in silico methods, and bioinformatics tools were combined to identify protein profiles linked to periodontitis progression and to explore their potential connection with ferroptosis. Subsequent western blot analyses validated key findings. Finally, a single-cell RNA sequencing (scRNA-seq) dataset (GSE164241) for gingival tissues was analyzed to elucidate cellular dynamics during periodontitis progression. Periodontitis progression was identified as occurring at a faster rate than traditionally thought. GCF samples from progressing and non-progressing periodontal sites showed quantitative and qualitatively distinct proteomic profiles. In addition, specific biological processes and molecular functions during progressive periodontitis were revealed and a set of hub proteins, including SNCA, CA1, HBB, SLC4A1, and ANK1 was strongly associated with the clinical progression status of periodontitis. Moreover, we found specific proteins - drivers or suppressors - associated with ferroptosis (SNCA, FTH1, HSPB1, CD44, and GCLC), revealing the co-occurrence of this specific type of regulated cell death during the clinical progression of periodontitis. Additionally, the integration of quantitative proteomic data with scRNA-seq analysis suggested the susceptibility of fibroblasts to ferroptosis. Our analyses reveal proteins and processes linked to ferroptosis for the first time in periodontal patients, which offer new insights into the molecular mechanisms of progressive periodontal disease. These findings may lead to novel diagnostic and therapeutic strategies.
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Affiliation(s)
- Alfredo Torres
- Laboratory of Experimental Immunology & Cancer, Faculty of Dentistry, University of Chile, Santiago, Chile
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - M Angélica Michea
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Ákos Végvári
- Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Marion Arce
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Valentina Pérez
- Laboratory of Experimental Immunology & Cancer, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Marcela Alcota
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Alicia Morales
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Rolando Vernal
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile
- Periodontal Biology Laboratory, Faculty of Dentistry, Universidad de Chile, Santiago, Chile
| | - Mauricio Budini
- Laboratory of Cellular and Molecular Pathology, Institute for Research in Dental Sciences, Faculty of Dentistry, University of Chile, Santiago, Chile
| | - Roman A Zubarev
- Division of Chemistry I, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Fermín E González
- Laboratory of Experimental Immunology & Cancer, Faculty of Dentistry, University of Chile, Santiago, Chile.
- Department of Conservative Dentistry, Faculty of Dentistry, University of Chile, Santiago, Chile.
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9
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Schwab K, Frahm S, Magbagbeolu M, Horsley D, Goatman EA, Melis V, Theuring F, Ishaq A, Storey JMD, Harrington CR, Wischik CM, Riedel G. LETC inhibits α-Syn aggregation and ameliorates motor deficiencies in the L62 mouse model of synucleinopathy. Eur J Pharmacol 2024; 970:176505. [PMID: 38503400 DOI: 10.1016/j.ejphar.2024.176505] [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: 01/16/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 03/21/2024]
Abstract
Alpha-Synuclein (α-Syn) aggregation is a pathological feature of synucleinopathies, neurodegenerative disorders that include Parkinson's disease (PD). Here, we explored the efficacy of N,N,N',N'-tetraethyl-10H-phenothiazine-3,7-diamine dihydrochloride (LETC), a protein aggregation inhibitor, on α-Syn aggregation. In both cellular models and transgenic mice, α-Syn aggregation was achieved by the overexpression of full-length human α-Syn fused with a signal sequence peptide. α-Syn accumulated in transfected DH60.21 neuroblastoma cells and α-Syn aggregation was inhibited by LETC with an EC50 of 0.066 ± 0.047 μM. Full-length human α-Syn overexpressing Line 62 (L62) mice accumulated neuronal α-Syn that was associated with a decreased motor performance in the open field and automated home cage. LETC, administered orally for 6 weeks at 10 mg/kg significantly decreased α-Syn-positive neurons in multiple brain regions and this resulted in a rescue of movement deficits in the open field in these mice. LETC however, did not improve activity deficits of L62 mice in the home cage environment. The results suggest that LETC may provide a potential disease modification therapy in synucleinopathies through the inhibition of α-Syn aggregation.
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Affiliation(s)
- Karima Schwab
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK; Institute of Pharmacology, Charité - Universitätsmedizin Berlin, Hessische Str. 3-4, 10115, Berlin, Germany.
| | - Silke Frahm
- Institute of Pharmacology, Charité - Universitätsmedizin Berlin, Hessische Str. 3-4, 10115, Berlin, Germany
| | - Mandy Magbagbeolu
- Institute of Pharmacology, Charité - Universitätsmedizin Berlin, Hessische Str. 3-4, 10115, Berlin, Germany
| | - David Horsley
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Elizabeth A Goatman
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Valeria Melis
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
| | - Franz Theuring
- Institute of Pharmacology, Charité - Universitätsmedizin Berlin, Hessische Str. 3-4, 10115, Berlin, Germany
| | - Ahtsham Ishaq
- Department of Chemistry, University of Aberdeen, Aberdeen, UK
| | - John M D Storey
- Department of Chemistry, University of Aberdeen, Aberdeen, UK; TauRx Therapeutics Ltd., 395 King Street, Aberdeen, AB24 5RP, UK
| | - Charles R Harrington
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK; TauRx Therapeutics Ltd., 395 King Street, Aberdeen, AB24 5RP, UK
| | - Claude M Wischik
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK; TauRx Therapeutics Ltd., 395 King Street, Aberdeen, AB24 5RP, UK
| | - Gernot Riedel
- School of Medicine, Medical Sciences and Nutrition, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
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10
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Surguchov A. Nuclear α-synuclein regulates transcription and affects neuronal differentiation. FEBS J 2024; 291:1886-1888. [PMID: 38297983 DOI: 10.1111/febs.17072] [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: 01/05/2024] [Accepted: 01/19/2024] [Indexed: 02/02/2024]
Abstract
α-Synuclein is a member of the synuclein family well known for its involvement in Parkinson's disease and other synucleinopathies. Most studies investigate the mechanism of its involvement in pathology within the cell cytoplasm and extracellular space. However, despite a continuing interest in α-synuclein, two questions about this protein remain poorly understood. What is the normal physiological function of α-synuclein, and what does it do in the cell nucleus? A recent article by Takaaki Nakamura and colleagues contains at least a partial answer to both questions. The authors identified previously unknown α-synuclein-interacting proteins in the nucleus and showed that the protein complex containing α-synuclein modulates transcriptional profiles controlling the process of epigenetic alterations and neural differentiation.
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Affiliation(s)
- Andrei Surguchov
- Department of Neurology, Kansas University Medical Center, Kansas City, KS, USA
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11
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Jin M, Wang S, Gao X, Zou Z, Hirotsune S, Sun L. Pathological and physiological functional cross-talks of α-synuclein and tau in the central nervous system. Neural Regen Res 2024; 19:855-862. [PMID: 37843221 PMCID: PMC10664117 DOI: 10.4103/1673-5374.382231] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 05/05/2023] [Accepted: 07/12/2023] [Indexed: 10/17/2023] Open
Abstract
α-Synuclein and tau are abundant multifunctional brain proteins that are mainly expressed in the presynaptic and axonal compartments of neurons, respectively. Previous works have revealed that intracellular deposition of α-synuclein and/or tau causes many neurodegenerative disorders, including Alzheimer's disease and Parkinson's disease. Despite intense investigation, the normal physiological functions and roles of α-synuclein and tau are still unclear, owing to the fact that mice with knockout of either of these proteins do not present apparent phenotypes. Interestingly, the co-occurrence of α-synuclein and tau aggregates was found in post-mortem brains with synucleinopathies and tauopathies, some of which share similarities in clinical manifestations. Furthermore, the direct interaction of α-synuclein with tau is considered to promote the fibrillization of each of the proteins in vitro and in vivo. On the other hand, our recent findings have revealed that α-synuclein and tau are cooperatively involved in brain development in a stage-dependent manner. These findings indicate strong cross-talk between the two proteins in physiology and pathology. In this review, we provide a summary of the recent findings on the functional roles of α-synuclein and tau in the physiological conditions and pathogenesis of neurodegenerative diseases. A deep understanding of the interplay between α-synuclein and tau in physiological and pathological conditions might provide novel targets for clinical diagnosis and therapeutic strategies to treat neurodegenerative diseases.
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Affiliation(s)
- Mingyue Jin
- Guangxi Key Laboratory of Brain and Cognitive Neuroscience, Guilin Medical University, Guilin, Guangxi Zhuang Autonomous Region, China
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Shengming Wang
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Xiaodie Gao
- Guangxi Key Laboratory of Brain and Cognitive Neuroscience, Guilin Medical University, Guilin, Guangxi Zhuang Autonomous Region, China
| | - Zhenyou Zou
- Department of Scientific Research, Brain Hospital of Guangxi Zhuang Autonomous Region, Liuzhou, Guangxi Zhuang Autonomous Region, China
| | - Shinji Hirotsune
- Department of Genetic Disease Research, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Liyuan Sun
- Guangxi Key Laboratory of Brain and Cognitive Neuroscience, Guilin Medical University, Guilin, Guangxi Zhuang Autonomous Region, China
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12
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Steiner MA. Matters arising: In vivo effects of the alpha-synuclein misfolding inhibitor minzasolmin supports clinical development in Parkinson's disease. NPJ Parkinsons Dis 2024; 10:59. [PMID: 38486022 PMCID: PMC10940697 DOI: 10.1038/s41531-024-00657-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 01/31/2024] [Indexed: 03/17/2024] Open
Affiliation(s)
- Michel Alexander Steiner
- Idorsia Pharmaceuticals Ltd, CNS Pharmacology, Hegenheimermattweg 91, 4123, Allschwil, Switzerland.
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13
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Liampas I, Kyriakoulopoulou P, Siokas V, Tsiamaki E, Stamati P, Kefalopoulou Z, Chroni E, Dardiotis E. Apolipoprotein E Gene in α-Synucleinopathies: A Narrative Review. Int J Mol Sci 2024; 25:1795. [PMID: 38339074 PMCID: PMC10855384 DOI: 10.3390/ijms25031795] [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: 12/21/2023] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
In this narrative review, we delved into the intricate interplay between Apolipoprotein E (APOE) alleles (typically associated with Alzheimer's disease-AD) and alpha-synucleinopathies (aS-pathies), involving Parkinson's disease (PD), Parkinson's disease dementia (PDD), dementia with Lewy bodies (DLB), and multiple-system atrophy (MSA). First, in-vitro, animal, and human-based data on the exacerbating effect of APOE4 on LB pathology were summarized. We found robust evidence that APOE4 carriage constitutes a risk factor for PDD-APOE2, and APOE3 may not alter the risk of developing PDD. We confirmed that APOE4 copies confer an increased hazard towards DLB, as well. Again APOE2 and APOE3 appear unrelated to the risk of conversion. Of note, in individuals with DLB APOE4, carriage appears to be intermediately prevalent between AD and PDD-PD (AD > DLB > PDD > PD). Less consistency existed when it came to PD; APOE-PD associations tended to be markedly modified by ethnicity. Finally, we failed to establish an association between the APOE gene and MSA. Phenotypic associations (age of disease onset, survival, cognitive-neuropsychiatric- motor-, and sleep-related manifestations) between APOE alleles, and each of the aforementioned conditions were also outlined. Finally, a synopsis of literature gaps was provided followed by suggestions for future research.
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Affiliation(s)
- Ioannis Liampas
- Department of Neurology, University Hospital of Larissa, School of Medicine, University of Thessaly, 41100 Larissa, Greece; (V.S.); (P.S.); (E.D.)
| | - Panagiota Kyriakoulopoulou
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, 26504 Rio Patras, Greece; (P.K.); (E.T.); (Z.K.); (E.C.)
| | - Vasileios Siokas
- Department of Neurology, University Hospital of Larissa, School of Medicine, University of Thessaly, 41100 Larissa, Greece; (V.S.); (P.S.); (E.D.)
| | - Eirini Tsiamaki
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, 26504 Rio Patras, Greece; (P.K.); (E.T.); (Z.K.); (E.C.)
| | - Polyxeni Stamati
- Department of Neurology, University Hospital of Larissa, School of Medicine, University of Thessaly, 41100 Larissa, Greece; (V.S.); (P.S.); (E.D.)
| | - Zinovia Kefalopoulou
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, 26504 Rio Patras, Greece; (P.K.); (E.T.); (Z.K.); (E.C.)
| | - Elisabeth Chroni
- Department of Neurology, University Hospital of Patras, School of Medicine, University of Patras, 26504 Rio Patras, Greece; (P.K.); (E.T.); (Z.K.); (E.C.)
| | - Efthimios Dardiotis
- Department of Neurology, University Hospital of Larissa, School of Medicine, University of Thessaly, 41100 Larissa, Greece; (V.S.); (P.S.); (E.D.)
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14
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Sanyal A, Scanavachi G, Somerville E, Saminathan A, Nair A, Oikonomou A, Hatzakis NS, Kirchhausen T. Constitutive Endolysosomal Perforation in Neurons allows Induction of α-Synuclein Aggregation by Internalized Pre-Formed Fibrils. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.30.573738. [PMID: 38260258 PMCID: PMC10802249 DOI: 10.1101/2023.12.30.573738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
The endocytic pathway is both an essential route of molecular uptake in cells and a potential entry point for pathology-inducing cargo. The cell-to-cell spread of cytotoxic aggregates, such as those of α-synuclein (α-syn) in Parkinson's Disease (PD), exemplifies this duality. Here we used a human iPSC-derived induced neuronal model (iNs) prone to death mediated by aggregation in late endosomes and lysosomes of endogenous α-syn, seeded by internalized pre-formed fibrils of α-syn (PFFs). This PFF-mediated death was not observed with parental iPSCs or other non-neuronal cells. Using live-cell optical microscopy to visualize the read out of biosensors reporting endo-lysosome wounding, we discovered that up to about 10% of late endosomes and lysosomes in iNs exhibited spontaneous constitutive perforations, regardless of the presence of internalized PFFs. This wounding, absent in parental iPSCs and non-neuronal cells, corresponded to partial damage by nanopores in the limiting membranes of a subset of endolysosomes directly observed by volumetric focused ion beam scanning electron microscopy (FIB-SEM) in iNs and in CA1 pyramidal neurons from mouse brain, and not found in iPSCs or in other non-neuronal cells in culture or in mouse liver and skin. We suggest that the compromised limiting membranes in iNs and neurons in general are the primary conduit for cytosolic α-syn to access PFFs entrapped within endo-lysosomal lumens, initiating PFF-mediated α-syn aggregation. Significantly, eradicating the intrinsic endolysosomal perforations in iNs by inhibiting the endosomal Phosphatidylinositol-3-Phosphate/Phosphatidylinositol 5-Kinase (PIKfyve kinase) using Apilimod or Vacuolin-1 markedly reduced PFF-induced α-syn aggregation, despite PFFs continuing to enter the endolysosomal compartment. Crucially, this intervention also diminished iN death associated with PFF incubation. Our results reveal the surprising presence of intrinsically perforated endo-lysosomes in neurons, underscoring their crucial early involvement in the genesis of toxic α-syn aggregates induced by internalized PFFs. This discovery offers a basis for employing PIKfyve kinase inhibition as a potential therapeutic strategy to counteract synucleinopathies.
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Affiliation(s)
- Anwesha Sanyal
- Department of Cell Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
| | - Gustavo Scanavachi
- Department of Cell Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
| | - Elliott Somerville
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
| | - Anand Saminathan
- Department of Cell Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
| | - Athul Nair
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
| | | | - Nikos S. Hatzakis
- Department of Chemistry University of Copenhagen, 2100 Copenhagen, Denmark
| | - Tom Kirchhausen
- Department of Cell Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
- Program in Cellular and Molecular Medicine, Boston Children’s Hospital, 200 Longwood Ave, Boston, MA 02115, USA
- Department of Pediatrics, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
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15
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Fukasawa N, Maeda M, Sugiyama Y, Fukuda T, Shimoda M. Distribution of proteinase K-resistant anti-α-synuclein immunoreactive axons in the cardiac plexus is unbiased to the left ventricular anterior wall. Pathol Int 2024; 74:1-12. [PMID: 38038140 DOI: 10.1111/pin.13389] [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: 09/06/2023] [Accepted: 11/03/2023] [Indexed: 12/02/2023]
Abstract
Lewy body disease (LBD) is characterized by the appearance of Lewy neurites and Lewy bodies, which are predominantly composed of α-synuclein. Notably, the cardiac plexus (CP) is one of the main targets of LBD research. Although previous studies have reported obvious differences in the frequency of Lewy body pathology (LBP) in the CP, none of them have confirmed whether LBP preferably appears in any part of the CP. Thus, we aimed to clarify the emergence and/or propagation of LBP in the CP. In this study, 263 consecutive autopsy cases of patients aged ≥50 years were included, with one region per case selected from three myocardial perfusion areas (MPAs) and subjected to proteinase K and then immunohistochemically stained with anti-α-synuclein antibodies to assess LBP. We stained all three MPAs in 17 cases with low-density LBP and observed the actual distribution of LBP. LBP were identified in the CP in 20.2% (53/263) of patients. Moreover, we found that LBP may appear in only one region of MPAs, mainly in the young-old group (35.3% (6/17) of patients). These findings suggest that it is possible to underestimate LBP in the CP, especially in the young-old group, by restricting the search to only one of the three MPAs.
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Affiliation(s)
- Nei Fukasawa
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Miku Maeda
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
| | - Yoshifumi Sugiyama
- Division of Clinical Epidemiology, Research Center for Medical Sciences, The Jikei University School of Medicine, Tokyo, Japan
- Division of Community Health and Primary Care, Center for Medical Education, The Jikei University School of Medicine, Tokyo, Japan
| | - Takahiro Fukuda
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
- Medical Center for Memory & Cognitive Disorders, Sasebo Chuo Hospital, Nagasaki, Japan
| | - Masayuki Shimoda
- Department of Pathology, The Jikei University School of Medicine, Tokyo, Japan
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16
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Bartošová T, Klempíř J, Hansíková H. Coenzyme Q10: A Biomarker in the Differential Diagnosis of Parkinsonian Syndromes. Antioxidants (Basel) 2023; 12:2104. [PMID: 38136223 PMCID: PMC10740444 DOI: 10.3390/antiox12122104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/08/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023] Open
Abstract
Multiple system atrophy (MSA) is generally a sporadic neurodegenerative disease which ranks among atypical Parkinson's syndromes. The main clinical manifestation is a combination of autonomic dysfunction and parkinsonism and/or cerebellar disability. The disease may resemble other Parkinsonian syndromes, such as Parkinson's disease (PD) or progressive supranuclear palsy (PSP), from which MSA could be hardly distinguishable during the first years of progression. Due to the lack of a reliable and easily accessible biomarker, the diagnosis is still based primarily on the clinical picture. Recently, reduced levels of coenzyme Q10 (CoQ10) were described in MSA in various tissues, including the central nervous system. The aim of our study was to verify whether the level of CoQ10 in plasma and lymphocytes could serve as an easily available diagnostic biomarker of MSA. The study reported significantly lower levels of CoQ10 in the lymphocytes of patients with MSA compared to patients with PD and controls. The reduction in CoQ10 levels in lymphocytes correlated with the increasing degree of clinical involvement of patients with MSA. CoQ10 levels in lymphocytes seem to be a potential biomarker of disease progression.
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Affiliation(s)
- Tereza Bartošová
- Neurology and Center of Clinical Neuroscience, First Faculty of Medicine, Charles University and General University Hospital in Prague, 121 08 Prague, Czech Republic; (T.B.); (J.K.)
| | - Jiří Klempíř
- Neurology and Center of Clinical Neuroscience, First Faculty of Medicine, Charles University and General University Hospital in Prague, 121 08 Prague, Czech Republic; (T.B.); (J.K.)
| | - Hana Hansíková
- Laboratory for Study of Mitochondrial Disorders, Department of Pediatrics and Inherited Metabolic Disorders, First Faculty of Medicine, Charles University and General University Hospital in Prague, 128 08 Prague, Czech Republic
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17
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Arcos J, Grunenwald F, Sepulveda D, Jerez C, Urbina V, Huerta T, Troncoso-Escudero P, Tirado D, Perez A, Diaz-Espinoza R, Nova E, Kubitscheck U, Rodriguez-Gatica JE, Hetz C, Toledo J, Ahumada P, Rojas-Rivera D, Martín-Montañez E, Garcia-Fernandez M, Vidal RL. IGF2 prevents dopaminergic neuronal loss and decreases intracellular alpha-synuclein accumulation in Parkinson's disease models. Cell Death Discov 2023; 9:438. [PMID: 38042807 PMCID: PMC10693583 DOI: 10.1038/s41420-023-01734-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/05/2023] [Accepted: 11/21/2023] [Indexed: 12/04/2023] Open
Abstract
Parkinson's disease (PD) is the second most common late-onset neurodegenerative disease and the predominant cause of movement problems. PD is characterized by motor control impairment by extensive loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc). This selective dopaminergic neuronal loss is in part triggered by intracellular protein inclusions called Lewy bodies, which are composed mainly of misfolded alpha-synuclein (α-syn) protein. We previously reported insulin-like growth factor 2 (IGF2) as a key protein downregulated in PD patients. Here we demonstrated that IGF2 treatment or IGF2 overexpression reduced the α-syn aggregates and their toxicity by IGF2 receptor (IGF2R) activation in cellular PD models. Also, we observed IGF2 and its interaction with IGF2R enhance the α-syn secretion. To determine the possible IGF2 neuroprotective effect in vivo we used a gene therapy approach in an idiopathic PD model based on α-syn preformed fibrils intracerebral injection. IGF2 gene therapy revealed a significantly preventing of motor impairment in idiopathic PD model. Moreover, IGF2 expression prevents dopaminergic neuronal loss in the SN together with a decrease in α-syn accumulation (phospho-α-syn levels) in the striatum and SN brain region. Furthermore, the IGF2 neuroprotective effect was associated with the prevention of synaptic spines loss in dopaminergic neurons in vivo. The possible mechanism of IGF2 in cell survival effect could be associated with the decrease of the intracellular accumulation of α-syn and the improvement of dopaminergic synaptic function. Our results identify to IGF2 as a relevant factor for the prevention of α-syn toxicity in both in vitro and preclinical PD models.
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Affiliation(s)
- Javiera Arcos
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Felipe Grunenwald
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Denisse Sepulveda
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Carolina Jerez
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Valentina Urbina
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Tomas Huerta
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Paulina Troncoso-Escudero
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Molecular Diagnostic and Biomarkers Laboratory, Department of Pathology, Faculty of Medicine Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Daniel Tirado
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
| | - Angela Perez
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
| | - Rodrigo Diaz-Espinoza
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Esteban Nova
- Departamento de Química, Facultad de Ciencias Naturales, Matemáticas y Medio Ambiente, Universidad Tecnológica Metropolitana, Santiago, Chile
| | - Ulrich Kubitscheck
- Clausius Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn, Germany
| | | | - Claudio Hetz
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Jorge Toledo
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
| | - Pablo Ahumada
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
| | - Diego Rojas-Rivera
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
- Escuela de Biotecnología, Universidad Mayor, Santiago, Chile
- Center for Biomedicine, Universidad Mayor, Santiago, Chile
| | - Elisa Martín-Montañez
- Department of Pharmacology, Faculty of Medicine, Biomedical Research Institute of Malaga, University of Malaga, Malaga, Spain
| | - María Garcia-Fernandez
- Department of Human Physiology, Faculty of Medicine, Biomedical Research Institute of Malaga, University of Malaga, Malaga, Spain
| | - René L Vidal
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile.
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile.
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile.
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile.
- Escuela de Biotecnología, Universidad Mayor, Santiago, Chile.
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18
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Jahan I, Ahmad A, Deep S. Effect of flavonoids on the destabilization of α-synuclein fibrils and their conversion to amorphous aggregate: A molecular dynamics simulation and experimental study. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2023; 1871:140951. [PMID: 37574034 DOI: 10.1016/j.bbapap.2023.140951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/15/2023]
Abstract
The second most prevalent neurodegenerative disease, Parkinson's disease (PD), is caused by the accumulation and deposition of fibrillar aggregates of the α-Syn into the Lewy bodies. To create a potent pharmacological candidate to destabilize the preformed α-Syn fibril, it is important to understand the precise molecular mechanism underlying the destabilization of the α-Syn fibril. Through molecular dynamics simulations and experiments, we have examined the molecular mechanisms causing the destabilization and suppression of a newly discovered α-Syn fibril with a Greek-key-like shape and an aggregation prone state (APS) of α-Syn in the presence and absence of various Flvs. According to MD simulation and experimental evidence, morin, quercetin, and myricetin are the Flvs, most capable of destabilizing the fibrils and converting them into amorphous aggregates. Compared to galangin and kaempferol, they have more hydroxyl groups and form more hydrogen bonds with fibrils.The processes by which morin and myricetin prevent new fibril production from APS and destabilize the fibrils are different. According to linear interaction energy analysis, van der Waals interaction predominates with morin, and electrostatic interaction dominates with myricetin. Our MD simulation and experimental findings provide mechanistic insights into how Flvs destabilize α-Syn fibrils and change their morphology, opening the door to developing structure-based drugs for treating Parkinson's disease.
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Affiliation(s)
- Ishrat Jahan
- Department of Chemistry, Indian Institute of Technology Delhi, Delhi 110016, India
| | - Aziz Ahmad
- Department of Chemistry, Indian Institute of Technology Delhi, Delhi 110016, India
| | - Shashank Deep
- Department of Chemistry, Indian Institute of Technology Delhi, Delhi 110016, India.
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19
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Ortigosa-Pascual L, Leiding T, Linse S, Pálmadóttir T. Photo-Induced Cross-Linking of Unmodified α-Synuclein Oligomers. ACS Chem Neurosci 2023; 14:3192-3205. [PMID: 37621159 PMCID: PMC10485903 DOI: 10.1021/acschemneuro.3c00326] [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: 05/12/2023] [Accepted: 08/14/2023] [Indexed: 08/26/2023] Open
Abstract
Photo-induced cross-linking of unmodified proteins (PICUP) has been used in the past to study size distributions of protein assemblies. PICUP may, for example, overcome the significant experimental challenges related to the transient nature, heterogeneity, and low concentration of amyloid protein oligomers relative to monomeric and fibrillar species. In the current study, a reaction chamber was designed, produced, and used for PICUP reaction optimization in terms of reaction conditions and lighting time from ms to s. These efforts make the method more reproducible and accessible and enable the use of shorter reaction times compared to previous studies. We applied the optimized method to an α-synuclein aggregation time course to monitor the relative concentration and size distribution of oligomers over time. The data are compared to the time evolution of the fibril mass concentration, as monitored by thioflavin T fluorescence. At all time points, the smaller the oligomer, the higher its concentration observed after PICUP. Moreover, the total oligomer concentration is highest at short aggregation times, and the decline over time follows the disappearance of monomers. We can therefore conclude that these oligomers form from monomers.
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Affiliation(s)
- Lei Ortigosa-Pascual
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Thom Leiding
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Sara Linse
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
| | - Tinna Pálmadóttir
- Department of Biochemistry and Structural
Biology, Lund University, 221 00 Lund, Sweden
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20
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Cools R, Kerkhofs K, Leitao RCF, Bormans G. Preclinical Evaluation of Novel PET Probes for Dementia. Semin Nucl Med 2023; 53:599-629. [PMID: 37149435 DOI: 10.1053/j.semnuclmed.2023.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 03/24/2023] [Indexed: 05/08/2023]
Abstract
The development of novel PET imaging agents that selectively bind specific dementia-related targets can contribute significantly to accurate, differential and early diagnosis of dementia causing diseases and support the development of therapeutic agents. Consequently, in recent years there has been a growing body of literature describing the development and evaluation of potential new promising PET tracers for dementia. This review article provides a comprehensive overview of novel dementia PET probes under development, classified by their target, and pinpoints their preclinical evaluation pathway, typically involving in silico, in vitro and ex/in vivo evaluation. Specific target-associated challenges and pitfalls, requiring extensive and well-designed preclinical experimental evaluation assays to enable successful clinical translation and avoid shortcomings observed for previously developed 'well-established' dementia PET tracers are highlighted in this review.
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Affiliation(s)
- Romy Cools
- Laboratory for Radiopharmaceutical Research, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Kobe Kerkhofs
- Laboratory for Radiopharmaceutical Research, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium; NURA, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Renan C F Leitao
- Laboratory for Radiopharmaceutical Research, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium
| | - Guy Bormans
- Laboratory for Radiopharmaceutical Research, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium.
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21
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Marín I. Emergence of the Synucleins. BIOLOGY 2023; 12:1053. [PMID: 37626939 PMCID: PMC10451939 DOI: 10.3390/biology12081053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/21/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023]
Abstract
This study establishes the origin and evolutionary history of the synuclein genes. A combination of phylogenetic analyses of the synucleins from twenty-two model species, characterization of local synteny similarities among humans, sharks and lampreys, and statistical comparisons among lamprey and human chromosomes, provides conclusive evidence for the current diversity of synuclein genes arising from the whole-genome duplications (WGDs) that occurred in vertebrates. An ancestral synuclein gene was duplicated in a first WGD, predating the diversification of all living vertebrates. The two resulting genes are still present in agnathan vertebrates. The second WGD, specific to the gnathostome lineage, led to the emergence of the three classical synuclein genes, SNCA, SNCB and SNCG, which are present in all jawed vertebrate lineages. Additional WGDs have added new genes in both agnathans and gnathostomes, while some gene losses have occurred in particular species. The emergence of synucleins through WGDs prevented these genes from experiencing dosage effects, thus avoiding the potential detrimental effects associated with individual duplications of genes that encode proteins prone to aggregation. Additional insights into the structural and functional features of synucleins are gained through the analysis of the highly divergent synuclein proteins present in chondrichthyans and agnathans.
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Affiliation(s)
- Ignacio Marín
- Instituto de Biomedicina de Valencia, Consejo Superior de Investigaciones Científicas (IBV-CSIC), 46010 Valencia, Spain
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22
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Jain MK, Bhat R. Modulation of the conformation, fibrillation, and fibril morphologies of human brain α-, β-, and γ-syn proteins by the disaccharide chemical chaperone trehalose. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2023:140932. [PMID: 37433401 DOI: 10.1016/j.bbapap.2023.140932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 06/18/2023] [Accepted: 06/21/2023] [Indexed: 07/13/2023]
Abstract
Human α-, β-, and γ-synuclein (syn) are natively unfolded proteins present in the brain. Deposition of aggregated α-syn in Lewy bodies is associated with Parkinson's disease (PD) and γ-syn is known to be involved in both neurodegeneration and breast cancer. At physiological pH, while α-syn has the highest propensity for fibrillation followed by γ-syn, β-syn does not form any fibrils. Fibril formation in these proteins could be modulated by protein structure stabilizing osmolytes such as trehalose which has an exceptional stabilizing effect for globular proteins. We present a comprehensive study of the effect of trehalose on the conformation, aggregation, and fibril morphology of α-, β-, and γ-syn proteins. Rather than stabilizing the intrinsically disordered state of the synucleins, trehalose accelerates the rate of fibril formation by forming aggregation-competent partially folded intermediate structures. Fibril morphologies are also strongly dependent on the concentration of trehalose with ≤ 0.4M favoring the formation of mature fibrils in α-, and γ-syn with no effect on the fibrillation of β-syn. At ≥ 0.8M, trehalose promotes the formation of smaller aggregates that are more cytotoxic. Live cell imaging of preformed aggregates of a labeled A90C α-syn shows their rapid internalization into neural cells which could be useful in reducing the load of aggregated species of α-syn. The findings throw light on the differential effect of trehalose on the conformation and aggregation of disordered synuclein proteins with respect to globular proteins and could help in understanding the effect of osmolytes on intrinsically disordered proteins under cellular stress conditions.
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Affiliation(s)
- Manish K Jain
- School of Biotechnology, Jawaharlal Nehru University, New Delhi 110 067, India; Department of Pharmacology, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA
| | - Rajiv Bhat
- School of Biotechnology, Jawaharlal Nehru University, New Delhi 110 067, India.
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23
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Kaur G, Mankoo OK, Goyal D, Goyal B. Unveiling How Hydroxytyrosol Destabilizes α-Syn Oligomers Using Molecular Simulations. J Phys Chem B 2023. [PMID: 37319389 DOI: 10.1021/acs.jpcb.3c02434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The etiology of Parkinson's disease (PD) is mainly linked to the α-synuclein (α-Syn) fibrillogenesis. Hydroxytyrosol (HT), also known as 3,4-dihydroxyphenylethanol, is a naturally occurring polyphenol, found in extra virgin olive oil, and has been shown to have cardioprotective, anticancer, antiobesity, and antidiabetic properties. HT has neuroprotective benefits in neurodegenerative diseases and lessens the severity of PD by reducing the aggregation of α-Syn and destabilizing the preformed toxic α-Syn oligomers. However, the molecular mechanism by which HT destabilizes α-Syn oligomers and alleviates the accompanying cytotoxicity remains unexplored. The impact of HT on the α-Syn oligomer structure and its potential binding mechanism was examined in this work by employing molecular dynamics (MD) simulations. The secondary structure analysis depicted that HT significantly reduces the β-sheet and concomitantly increases the coil content of α-Syn trimer. Visualization of representative conformations from the clustering analysis depicted the hydrogen bond interactions of the hydroxyl groups in HT with the N-terminal and nonamyloid-β component (NAC) region residues of α-Syn trimer, which, in turn, leads to the weakening of interchain interactions in α-Syn trimer and resulted in the disruption of the α-Syn oligomer. The binding free energy calculations depict that HT binds favorably to α-Syn trimer (ΔGbinding = -23.25 ± 7.86 kcal/mol) and a notable reduction in the interchain binding affinity of α-Syn trimer on the incorporation of HT, which, in turn, highlights its potential to disrupt α-Syn oligomers. The current research provided mechanistic insights into the destabilization of α-Syn trimer by HT, which, in turn, will provide new clues for developing therapeutics against PD.
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Affiliation(s)
- Gagandeep Kaur
- Department of Chemistry, Faculty of Basic and Applied Sciences, Sri Guru Granth Sahib World University, Fatehgarh Sahib-140406, Punjab, India
| | - Opinder Kaur Mankoo
- Department of Chemistry, Faculty of Basic and Applied Sciences, Sri Guru Granth Sahib World University, Fatehgarh Sahib-140406, Punjab, India
| | - Deepti Goyal
- Department of Chemistry, DAV College, Sector 10, Chandigarh-160011, India
| | - Bhupesh Goyal
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Patiala-147004, Punjab, India
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24
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Zanotti LC, Malizia F, Cesatti Laluce N, Avila A, Mamberto M, Anselmino LE, Menacho-Márquez M. Synuclein Proteins in Cancer Development and Progression. Biomolecules 2023; 13:980. [PMID: 37371560 PMCID: PMC10296229 DOI: 10.3390/biom13060980] [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: 04/30/2023] [Revised: 05/19/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
Synucleins are a family of small, soluble proteins mainly expressed in neural tissue and in certain tumors. Since their discovery, tens of thousands of scientific reports have been published about this family of proteins as they are associated with severe human diseases. Although the physiological function of these proteins is still elusive, their relationship with neurodegeneration and cancer has been clearly described over the years. In this review, we summarize data connecting synucleins and cancer, going from the structural description of these molecules to their involvement in tumor-related processes, and discuss the putative use of these proteins as cancer molecular biomarkers.
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Affiliation(s)
- Lucía C. Zanotti
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Florencia Malizia
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Nahuel Cesatti Laluce
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Aylén Avila
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Macarena Mamberto
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Luciano E. Anselmino
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
| | - Mauricio Menacho-Márquez
- Instituto de Inmunología Clínica y Experimental de Rosario (IDICER, CONICET-UNR), Facultad de Ciencias Médicas (UNR), Rosario 3100, Argentina
- Instituto de Inmunología Clínica y Experimental, CONICET, Rosario 3100, Argentina
- Centro de Investigación y Producción de Reactivos Biológicos (CIPReB), Facultad de Ciencias Médicas (UNR), Suipacha 660, Rosario 2000, Argentina
- Centro de Investigación del Cáncer de Rosario, Red de Investigación del Cáncer de Rosario (RICaR), 37007 Salamanca, Spain
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Pedrini M, Iannielli A, Meneghelli L, Passarella D, Broccoli V, Seneci P. Synthesis and Preliminary Characterization of Putative Anle138b-Centered PROTACs against α-Synuclein Aggregation. Pharmaceutics 2023; 15:pharmaceutics15051467. [PMID: 37242709 DOI: 10.3390/pharmaceutics15051467] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 04/29/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
The search for disease-modifying agents targeted against Parkinson's disease led us to rationally design a small array of six Anle138b-centered PROTACs, 7a,b, 8a,b and 9a,b, targeting αSynuclein (αSyn) aggregates for binding, polyubiquitination by the E3 ligase Cereblon (CRBN), and proteasomal degradation. Lenalidomide and thalidomide were used as CRBN ligands and coupled with amino- and azido Anle138b derivatives through flexible linkers and coupling reactions (amidation, 'click' chemistry). Four Anle138b-PROTACs, 8a,b and 9a,b, were characterized against in vitro αSyn aggregation, monitoring them in a Thioflavin T (ThT) fluorescence assay and in dopaminergic neurons derived from a set of isogenic pluripotent stem cell (iPSC) lines with SNCA multiplications. Native and seeded αSyn aggregation was determined with a new biosensor, and a partial correlation between αSyn aggregation, cellular dysfunctions, and neuronal survival was obtained. Anle138b-PROTAC 8a was characterized as the most promising αSyn aggregation inhibitor/degradation inducer, with potential usefulness against synucleinopathies and cancer.
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Affiliation(s)
- Martina Pedrini
- Chemistry Department, Milan University, Via Golgi 19, 20133 Milan, Italy
| | - Angelo Iannielli
- Neuroscience Institute, Consiglio Nazionale delle Ricerche (CNR), Via Olgettina 58, 20132 Milan, Italy
- Stem Cells and Neurogenesis Unit, San Raffaele Hospital, Via Olgettina 58, 20132 Milan, Italy
| | - Lorenzo Meneghelli
- Chemistry Department, Milan University, Via Golgi 19, 20133 Milan, Italy
| | - Daniele Passarella
- Chemistry Department, Milan University, Via Golgi 19, 20133 Milan, Italy
| | - Vania Broccoli
- Neuroscience Institute, Consiglio Nazionale delle Ricerche (CNR), Via Olgettina 58, 20132 Milan, Italy
- Stem Cells and Neurogenesis Unit, San Raffaele Hospital, Via Olgettina 58, 20132 Milan, Italy
| | - Pierfausto Seneci
- Chemistry Department, Milan University, Via Golgi 19, 20133 Milan, Italy
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26
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Brontesi L, Imberdis T, Ramalingam N, Dettmer U. The effects of KTKEGV repeat motif and intervening ATVA sequence on α-synuclein solubility and assembly. J Neurochem 2023; 165:246-258. [PMID: 36625497 PMCID: PMC10211470 DOI: 10.1111/jnc.15763] [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: 02/15/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 01/11/2023]
Abstract
Alpha-synuclein (αS), the key protein in Parkinson's disease, is typically described as an intrinsically disordered protein. Consistent with this notion, several context-dependent folding states may coexist in neurons. Unfolded soluble monomers, helical monomers at membranes and helical multimers (soluble or at membranes) have all been reported and may be in an equilibrium with each other. We previously found that αS can be stabilized in its membrane-associated monomeric form by genetically increasing the hydrophobicity of the membrane-embedded half of the αS helix. αS amphipathic helix formation at membranes is governed by up to nine 11-amino acid repeats with the core motif KTKEGV. However, this repeat is only imperfectly conserved; for example, it consists of KAKEGV in repeat #1, KTKEQV in repeat #5, and AVVTGV in the poorly conserved repeat #6. Here we explored the effect of perfecting the αS core repeat to nine times KTKEGV ("9KV") and found by sequential protein extraction that this engineered mutant accumulates in the cytosolic phase of neural cells. Intact-cell cross-linking trapped a part of the cytosolic portion at multimeric positions (30, 60, 80, 100 kDa). Thus, compared to wild-type αS, αS 9KV seems less prone to populating the membrane-associated monomeric form. Removing the "ATVA" intervening amino-acid sequence between repeats 4 and 5 slightly increased cytosolic localization while adding "ATVA" in between all repeats 1-8 caused αS to be trapped as a monomer in membrane fractions. Our results contribute to an ongoing debate on the dynamic structure of αS, highlighting that wild-type αS is unlikely to be fully multimeric/monomeric or fully cytosolic/membrane-associated in cells, but protein engineering can create αS variants that preferentially adopt a certain state. Overall, the imperfect nature of the KTKEGV repeat motifs and the presence of ATVA in between repeats 4 and 5 seem to prevent a strong cytosolic localization of αS and thus play a major role in the protein's ability to dynamically populate cytosolic vs. membrane-associated and monomeric vs. multimeric states.
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Affiliation(s)
| | | | - Nagendran Ramalingam
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 USA
| | - Ulf Dettmer
- Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 USA
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Light, Water, and Melatonin: The Synergistic Regulation of Phase Separation in Dementia. Int J Mol Sci 2023; 24:ijms24065835. [PMID: 36982909 PMCID: PMC10054283 DOI: 10.3390/ijms24065835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 03/17/2023] [Indexed: 03/22/2023] Open
Abstract
The swift rise in acceptance of molecular principles defining phase separation by a broad array of scientific disciplines is shadowed by increasing discoveries linking phase separation to pathological aggregations associated with numerous neurodegenerative disorders, including Alzheimer’s disease, that contribute to dementia. Phase separation is powered by multivalent macromolecular interactions. Importantly, the release of water molecules from protein hydration shells into bulk creates entropic gains that promote phase separation and the subsequent generation of insoluble cytotoxic aggregates that drive healthy brain cells into diseased states. Higher viscosity in interfacial waters and limited hydration in interiors of biomolecular condensates facilitate phase separation. Light, water, and melatonin constitute an ancient synergy that ensures adequate protein hydration to prevent aberrant phase separation. The 670 nm visible red wavelength found in sunlight and employed in photobiomodulation reduces interfacial and mitochondrial matrix viscosity to enhance ATP production via increasing ATP synthase motor efficiency. Melatonin is a potent antioxidant that lowers viscosity to increase ATP by scavenging excess reactive oxygen species and free radicals. Reduced viscosity by light and melatonin elevates the availability of free water molecules that allow melatonin to adopt favorable conformations that enhance intrinsic features, including binding interactions with adenosine that reinforces the adenosine moiety effect of ATP responsible for preventing water removal that causes hydrophobic collapse and aggregation in phase separation. Precise recalibration of interspecies melatonin dosages that account for differences in metabolic rates and bioavailability will ensure the efficacious reinstatement of the once-powerful ancient synergy between light, water, and melatonin in a modern world.
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28
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Interneuronal In Vivo Transfer of Synaptic Proteins. Cells 2023; 12:cells12040569. [PMID: 36831238 PMCID: PMC9954582 DOI: 10.3390/cells12040569] [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: 12/15/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023] Open
Abstract
Neuron-to-neuron transfer of pathogenic α-synuclein species is a mechanism of likely relevance to Parkinson's disease development. Experimentally, interneuronal α-synuclein spreading from the low brainstem toward higher brain regions can be reproduced by the administration of AAV vectors encoding for α-synuclein into the mouse vagus nerve. The aim of this study was to determine whether α-synuclein's spreading ability is shared by other proteins. Given α-synuclein synaptic localization, experiments involved intravagal injections of AAVs encoding for other synaptic proteins, β-synuclein, VAMP2, or SNAP25. Administration of AAV-VAMP2 or AAV-SNAP25 caused robust transduction of either of the proteins in the dorsal medulla oblongata but was not followed by interneuronal VAMP2 or SNAP25 transfer and caudo-rostral spreading. In contrast, AAV-mediated β-synuclein overexpression triggered its spreading to more frontal brain regions. The aggregate formation was investigated as a potential mechanism involved in protein spreading, and consistent with this hypothesis, results showed that overexpression of β-synuclein, but not VAMP2 or SNAP25, in the dorsal medulla oblongata was associated with pronounced protein aggregation. Data indicate that interneuronal protein transfer is not a mere consequence of increased expression or synaptic localization. It is rather promoted by structural/functional characteristics of synuclein proteins that likely include their tendency to form aggregate species.
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29
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Sharma M, Burré J. α-Synuclein in synaptic function and dysfunction. Trends Neurosci 2023; 46:153-166. [PMID: 36567199 PMCID: PMC9877183 DOI: 10.1016/j.tins.2022.11.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/07/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022]
Abstract
α-Synuclein is a neuronal protein that is enriched in presynaptic terminals. Under physiological conditions, it binds to synaptic vesicle membranes and functions in neurotransmitter release, although the molecular details remain unclear, and it is controversial whether α-synuclein inhibits or facilitates neurotransmitter release. Pathologically, in synucleinopathies including Parkinson's disease (PD), α-synuclein forms aggregates that recruit monomeric α-synuclein and spread throughout the brain, which triggers neuronal dysfunction at molecular, cellular, and organ levels. Here, we present an overview of the effects of α-synuclein on SNARE-complex assembly, neurotransmitter release, and synaptic vesicle pool homeostasis, and discuss how the observed divergent effects of α-synuclein on neurotransmitter release can be reconciled. We also discuss how gain-of-function versus loss-of-function of α-synuclein may contribute to pathogenesis in synucleinopathies.
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Affiliation(s)
- Manu Sharma
- Appel Alzheimer's Disease Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, USA.
| | - Jacqueline Burré
- Appel Alzheimer's Disease Research Institute, Brain and Mind Research Institute, Weill Cornell Medicine, New York, NY, USA.
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Rapid Scan Electron Paramagnetic Resonance Spectroscopy Is a Suitable Tool to Study Intermolecular Interactions of Intrinsically Disordered Protein. BIOLOGY 2023; 12:biology12010079. [PMID: 36671771 PMCID: PMC9856040 DOI: 10.3390/biology12010079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 12/21/2022] [Accepted: 12/22/2022] [Indexed: 01/06/2023]
Abstract
Intrinsically disordered proteins (IDPs) are involved in most crucial cellular processes. However, they lack a well-defined fold hampering the investigation of their structural ensemble and interactions. Suitable biophysical methods able to manage their inherent flexibility and broad conformational ensemble are scarce. Here, we used rapid scan (RS) electron paramagnetic resonance (EPR) spectroscopy to study the intermolecular interactions of the IDP α-synuclein (aS). aS aggregation and fibril deposition is the hallmark of Parkinson's disease, and specific point mutations, among them A30P and A53T, were linked to the early onset of the disease. To understand the pathological processes, research intensively investigates aS aggregation kinetics, which was reported to be accelerated in the presence of ethanol. Conventional techniques fail to capture these fast processes due to their limited time resolution and, thus, lose kinetic information. We have demonstrated that RS EPR spectroscopy is suitable for studying aS aggregation by resolving underlying kinetics and highlighting differences in fibrillization behavior. RS EPR spectroscopy outperforms traditional EPR methods in terms of sensitivity by a factor of 5 in our case while significantly reducing data acquisition time. Thus, we were able to sample short time intervals capturing single events taking place during the aggregation process. Further studies will therefore be able to shed light on biological processes proceeding on fast time scales.
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Bousset L, Alik A, Arteni A, Böckmann A, Meier BH, Melki R. α-Synuclein Fibril, Ribbon and Fibril-91 Amyloid Polymorphs Generation for Structural Studies. Methods Mol Biol 2023; 2551:345-355. [PMID: 36310214 DOI: 10.1007/978-1-0716-2597-2_23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The human α-synuclein protein, identified as one of the main markers of Parkinson's disease, is a 140-amino acid thermostable protein that can easily be overexpressed in E. coli. The purification protocol determines the ability of the protein to assemble into amyloid fibrils of well-defined structures. Here, we describe the purification and assembly protocols to obtain three well-characterized amyloid forms (ribbon, fibrils, and fibril-91) used to assess their activity in biochemical and cellular assays or to investigate their atomic structure by cryo-electron microscopy and solid-state NMR.
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Affiliation(s)
- Luc Bousset
- Université Paris-Saclay, CEA, CNRS, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-aux-Roses, France.
| | - Ania Alik
- Université Paris-Saclay, CEA, CNRS, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-aux-Roses, France
| | - Ana Arteni
- Institut de Biologie Intégrative de la Cellule (I2BC), CEA, CNRS, Université Paris Sud, Université Paris-Saclay, Gif-sur-Yvette, France
| | - Anja Böckmann
- Molecular Microbiology and Structural Biochemistry, Labex Ecofect, UMR 5086 CNRS, Université de Lyon, Lyon, France
| | - Beat H Meier
- Physical Chemistry, ETH Zürich, Zürich, Switzerland
| | - Ronald Melki
- Université Paris-Saclay, CEA, CNRS, MIRCen, Laboratoire des Maladies Neurodégénératives, Fontenay-aux-Roses, France
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Saurabh A, Prabhu NP. Concerted enhanced-sampling simulations to elucidate the helix-fibril transition pathway of intrinsically disordered α-Synuclein. Int J Biol Macromol 2022; 223:1024-1041. [PMID: 36379279 DOI: 10.1016/j.ijbiomac.2022.11.079] [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: 08/18/2022] [Revised: 10/19/2022] [Accepted: 11/08/2022] [Indexed: 11/13/2022]
Abstract
Fibril formation of α-synuclein is linked with Parkinson's disease. The intrinsically disordered nature of α-syn provides extensive conformational plasticity and becomes difficult to characterize its transition pathway from native monomeric to disease-associated fibril form. We implemented different simulation methods such as steered dynamics-umbrella sampling, and replica-exchange and conventional MD simulations to access various conformational states of α-syn. Nineteen distinct intermediate structures were identified by free energy landscape and cluster analysis. They were then sorted based on secondary structure and solvent exposure of fibril-core residues to illustrate the fibril dissociation pathway. The analysis showed that following the initial dissociation of the polypeptide chain from the fibril, α-syn might form either compact-conformations by long-range interactions or extended-conformations stabilized by local interactions. This leads α-syn to adapt two different pathways. The secondary structure, solvation, contact distance, interaction energies and backbone dihedrals of thirty-two selected residues were analyzed for all the 19 intermediates. The results suggested that formation of β-turns, reorganization of salt bridges, and dihedral changes in the hydrophobic regions are the major driving forces for helix-fibril transition. Structural features of the intermediates also correlated with the earlier experimental and computational studies. The study provides critical information on the fibrillation pathway of α-syn.
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Affiliation(s)
- Archi Saurabh
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India
| | - N Prakash Prabhu
- Department of Biotechnology & Bioinformatics, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, India.
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Grønnemose AL, Østerlund EC, Otzen DE, Jørgensen TJD. EGCG has Dual and Opposing Effects on the N-terminal Region of Self-associating α-synuclein Oligomers. J Mol Biol 2022; 434:167855. [PMID: 36240861 DOI: 10.1016/j.jmb.2022.167855] [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: 06/29/2022] [Revised: 09/11/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022]
Abstract
Oligomers of the protein α-synuclein (α-syn) are thought to be a major toxic species in Parkinson's disease, particularly through their ability to permeabilize cell membranes. The green tea polyphenol epigallocatechin gallate (EGCG) has been found to reduce this ability. We have analyzed α-syn oligomer dynamics and interconversion by H/D exchange monitored by mass spectrometry (HDX-MS). Our results show that the two oligomers OI and OII co-exist in equilibrium; OI is a multimer of OII and its dissociation can be followed by HDX-MS by virtue of the correlated exchange of the N-terminal region. Urea destabilizes the α-syn oligomers, dissociating OI to OII and monomers. Oligomers exposed to EGCG undergo Met oxidation. Intriguingly, EGCG induces an oxidation-dependent effect on the structure of the N-terminal region. For the non-oxidized N-terminal region, EGCG increases the stability of the folded structure as measured by a higher level of protection against H/D exchange. In contrast, protection is clearly abrogated in the Met oxidized N-terminal region. Having a non-oxidized and disordered N-terminal region is known to be essential for efficient membrane binding. Therefore, our results suggest that the combined effect of a structural stabilization of the non-oxidized N-terminal region and the presence of a disordered oxidized N-terminal region renders the oligomers less cytotoxic by decreasing the ability of the N-terminal region to bind to cell membranes and facilitate their permeabilization.
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Affiliation(s)
- Anne Louise Grønnemose
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark; Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Eva Christina Østerlund
- Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Daniel Erik Otzen
- Interdisciplinary Nanoscience Centre (iNANO), Aarhus University, Gustav Wieds Vej 14, 8000 Aarhus C, Denmark.
| | - Thomas J D Jørgensen
- Department of Biochemistry and Molecular Biology (BMB), University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
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Synucleins: New Data on Misfolding, Aggregation and Role in Diseases. Biomedicines 2022; 10:biomedicines10123241. [PMID: 36551997 PMCID: PMC9775291 DOI: 10.3390/biomedicines10123241] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/05/2022] [Accepted: 12/07/2022] [Indexed: 12/15/2022] Open
Abstract
The synucleins are a family of natively unfolded (or intrinsically unstructured) proteins consisting of α-, β-, and γ-synuclein involved in neurodegenerative diseases and cancer. The current number of publications on synucleins has exceeded 16.000. They remain the subject of constant interest for over 35 years. Two reasons explain this unchanging attention: synuclein's association with several severe human diseases and the lack of understanding of the functional roles under normal physiological conditions. We analyzed recent publications to look at the main trends and developments in synuclein research and discuss possible future directions. Traditional areas of peak research interest which still remain high among last year's publications are comparative studies of structural features as well as functional research on of three members of the synuclein family. Another popular research topic in the area is a mechanism of α-synuclein accumulation, aggregation, and fibrillation. Exciting fast-growing area of recent research is α-synuclein and epigenetics. We do not present here a broad and comprehensive review of all directions of studies but summarize only the most significant recent findings relevant to these topics and outline potential future directions.
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Bopardikar M, Koti Ainavarapu SR, Hosur RV. Pyrogallol, Corilagin and Chebulagic acid target the "fuzzy coat" of alpha-synuclein to inhibit the fibrillization of the protein. RSC Adv 2022; 12:35770-35777. [PMID: 36545068 PMCID: PMC9749937 DOI: 10.1039/d2ra04358k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 10/13/2022] [Indexed: 12/15/2022] Open
Abstract
The accumulation of the intrinsically disordered protein alpha-synuclein (αSyn) in the form of insoluble fibrillar aggregates in the central nervous system is linked to a variety of neurodegenerative disorders such as Parkinson's disease, Lewy body dementia, and multiple system atrophy. Here we show that Pyrogallol, Corilagin and Chebulagic acid, compounds containing a different number of catechol rings, are independently capable of delaying and reducing the extent of αSyn fibrillization. The efficiency of inhibition was found to correlate with the number of catechol rings. Further, our NMR studies reveal that these compounds interact with the N-terminal region of αSyn which is unstructured even in the fibrillar form of the protein and is known as the "fuzzy coat" of fibrils. Thus, Corilagin and Chebulagic acid target the fuzzy coat of αSyn and not the amyloid core which is a common target for the inhibition of protein fibrillization. Our results indicate that the N-terminus also plays a key role in the fibrillization of αSyn.
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Affiliation(s)
- Mandar Bopardikar
- Department of Chemical Sciences, Tata Institute of Fundamental ResearchHomi Bhabha Road, ColabaMumbai 400005India
| | - Sri Rama Koti Ainavarapu
- Department of Chemical Sciences, Tata Institute of Fundamental ResearchHomi Bhabha Road, ColabaMumbai 400005India
| | - Ramakrishna V. Hosur
- UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina CampusSantacruzMumbai 400098India
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Yi S, Wang L, Wang H, Ho MS, Zhang S. Pathogenesis of α-Synuclein in Parkinson's Disease: From a Neuron-Glia Crosstalk Perspective. Int J Mol Sci 2022; 23:14753. [PMID: 36499080 PMCID: PMC9739123 DOI: 10.3390/ijms232314753] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder. The classical behavioral defects of PD patients involve motor symptoms such as bradykinesia, tremor, and rigidity, as well as non-motor symptoms such as anosmia, depression, and cognitive impairment. Pathologically, the progressive loss of dopaminergic (DA) neurons in the substantia nigra (SN) and the accumulation of α-synuclein (α-syn)-composed Lewy bodies (LBs) and Lewy neurites (LNs) are key hallmarks. Glia are more than mere bystanders that simply support neurons, they actively contribute to almost every aspect of neuronal development and function; glial dysregulation has been implicated in a series of neurodegenerative diseases including PD. Importantly, amounting evidence has added glial activation and neuroinflammation as new features of PD onset and progression. Thus, gaining a better understanding of glia, especially neuron-glia crosstalk, will not only provide insight into brain physiology events but also advance our knowledge of PD pathologies. This review addresses the current understanding of α-syn pathogenesis in PD, with a focus on neuron-glia crosstalk. Particularly, the transmission of α-syn between neurons and glia, α-syn-induced glial activation, and feedbacks of glial activation on DA neuron degeneration are thoroughly discussed. In addition, α-syn aggregation, iron deposition, and glial activation in regulating DA neuron ferroptosis in PD are covered. Lastly, we summarize the preclinical and clinical therapies, especially targeting glia, in PD treatments.
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Affiliation(s)
| | | | | | - Margaret S. Ho
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Shiping Zhang
- School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China
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Tanaka MT, Miki Y, Bettencourt C, Ozaki T, Tanji K, Mori F, Kakita A, Wakabayashi K. Involvement of autophagic protein DEF8 in Lewy bodies. Biochem Biophys Res Commun 2022; 623:170-175. [DOI: 10.1016/j.bbrc.2022.07.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 07/18/2022] [Indexed: 11/28/2022]
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Goloborshcheva VV, Kucheryanu VG, Voronina NA, Teterina EV, Ustyugov AA, Morozov SG. Synuclein Proteins in MPTP-Induced Death of Substantia Nigra Pars Compacta Dopaminergic Neurons. Biomedicines 2022; 10:biomedicines10092278. [PMID: 36140378 PMCID: PMC9496024 DOI: 10.3390/biomedicines10092278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/01/2022] [Accepted: 09/06/2022] [Indexed: 11/24/2022] Open
Abstract
Parkinson’s disease (PD) is one of the key neurodegenerative disorders caused by a dopamine deficiency in the striatum due to the death of dopaminergic (DA) neurons of the substantia nigra pars compacta. The initially discovered A53T mutation in the alpha-synuclein gene was linked to the formation of cytotoxic aggregates: Lewy bodies in the DA neurons of PD patients. Further research has contributed to the discovery of beta- and gamma-synucleins, which presumably compensate for the functional loss of either member of the synuclein family. Here, we review research from 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) toxicity models and various synuclein-knockout animals. We conclude that the differences in the sensitivity of the synuclein-knockout animals compared with the MPTP neurotoxin are due to the ontogenetic selection of early neurons followed by a compensatory effect of beta-synuclein, which optimizes dopamine capture in the synapses. Triple-knockout synuclein studies have confirmed the higher sensitivity of DA neurons to the toxic effects of MPTP. Nonetheless, beta-synuclein could modulate the alpha-synuclein function, preventing its aggregation and loss of function. Overall, the use of knockout animals has helped to solve the riddle of synuclein functions, and these proteins could be promising molecular targets for the development of therapies that are aimed at optimizing the synaptic function of dopaminergic neurons.
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Affiliation(s)
- Valeria V. Goloborshcheva
- Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia
- Correspondence: ; Tel.: +7-(909)-644-92-31
| | | | | | - Ekaterina V. Teterina
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, 142432 Chernogolovka, Russia
| | - Aleksey A. Ustyugov
- Institute of Physiologically Active Compounds, Russian Academy of Sciences, 142432 Chernogolovka, Russia
| | - Sergei G. Morozov
- Institute of General Pathology and Pathophysiology, 125315 Moscow, Russia
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Miao WG, Nguyen T, Iqbal J, Pierens GK, Ma L, Richardson DR, Wood SA, Mellick GD, Quinn RJ, Feng Y. Meeting the Challenge 2: Identification of Potential Chemical Probes for Parkinson's Disease from Ligusticum chuanxiong Hort Using Cytological Profiling. ACS Chem Neurosci 2022; 13:2565-2578. [PMID: 36018577 DOI: 10.1021/acschemneuro.1c00820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Traditional Chinese medicine (TCM) has been around for thousands of years and is increasingly gaining popularity in the Western world to treat various complex disorders including the incurable neurodegenerative condition, Parkinson's Disease (PD). One of the many directions in recent studies of PD is utilizing the phenotypic assay, or cytological profiling, to evaluate the phenotypic changes of PD-implicated cellular components in patient-derived olfactory neuroepithelial (hONS) cells, upon treating the cells with extracts or pure compounds. To obtain small molecules for studies utilizing PD phenotyping assays, Ligusticum chuanxiong Hort was selected for analysis as it is a popular Chinese herbal medicine used for treating PD-like symptoms. Fifty-three secondary metabolites, including six new compounds, were isolated from the ethanolic extract of L. chuanxiong; their structures were elucidated based on several spectroscopic techniques such as NMR, MS, Fourier transform infrared (FTIR), UV, and theoretical density functional theory (DFT) calculations. Cytological profiling of the afforded natural products against PD hONS cells revealed 34 compounds strongly perturbated the staining of several cellular organelles. In fact, greaterthan 1.5-fold change was observed compared to the control (dimethyl sulfoxide; DMSO), with early endosome, lysosome, and autophagosome (LC3b) being particularly affected. Given these biological compartments are closely related to PD pathogenesis, the results helped rationalize the traditional medicinal use of L. chuanxiong in PD treatment. Further, the hit compounds can serve as chemical probes to map the molecular pathways underlying PD, potentially leading to new therapeutic targets for PD.
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Affiliation(s)
- William Gang Miao
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Thanh Nguyen
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Jamila Iqbal
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Gregory K Pierens
- Centre for Advanced Imaging, The University of Queensland, St Lucia, QLD 4072, Australia
| | - Linlin Ma
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Des R Richardson
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Stephen A Wood
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - George D Mellick
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia.,School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Ronald J Quinn
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
| | - Yunjiang Feng
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Road, Nathan, QLD 4111, Australia
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Knecht L, Folke J, Dodel R, Ross JA, Albus A. Alpha-synuclein Immunization Strategies for Synucleinopathies in Clinical Studies: A Biological Perspective. Neurotherapeutics 2022; 19:1489-1502. [PMID: 36083395 PMCID: PMC9606184 DOI: 10.1007/s13311-022-01288-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2022] [Indexed: 11/29/2022] Open
Abstract
The therapeutic strategies currently available for neurodegenerative diseases such as Parkinson's disease target only the symptoms of the disease. Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy can be summarized as synucleinopathies, as they are all characterized by the aggregation and accumulation of alpha-synuclein (α-syn) in the brain. Targeting α-syn by its formation and progression opens a new and promising disease-modifying therapeutic strategy. Thus, several distinct immunotherapeutic approaches are currently being evaluated in clinical trials. The objective of this article is to review, from a biological perspective, the most important properties of these passive and active immunotherapies to point out their relevance and suitability for the treatment of synucleinopathies.
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Affiliation(s)
- Luisa Knecht
- Chair of Geriatric Medicine, University Duisburg-Essen, Essen, Germany
| | - Jonas Folke
- Chair of Geriatric Medicine, University Duisburg-Essen, Essen, Germany
- Centre for Neuroscience & Stereology, Department of Neurology, Bispebjerg-Frederiksberg Hospital, University Hospital of Copenhagen, 2400, Copenhagen, Denmark
| | - Richard Dodel
- Chair of Geriatric Medicine, University Duisburg-Essen, Essen, Germany.
| | - J Alexander Ross
- Chair of Geriatric Medicine, University Duisburg-Essen, Essen, Germany
| | - Alexandra Albus
- Chair of Geriatric Medicine, University Duisburg-Essen, Essen, Germany
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Neurochemical Monitoring of Traumatic Brain Injury by the Combined Analysis of Plasma Beta-Synuclein, NfL, and GFAP in Polytraumatized Patients. Int J Mol Sci 2022; 23:ijms23179639. [PMID: 36077033 PMCID: PMC9456193 DOI: 10.3390/ijms23179639] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 11/17/2022] Open
Abstract
Traumatic brain injury (TBI) represents a major determining factor of outcome in severely injured patients. However, reliable brain-damage-monitoring markers are still missing. We therefore assessed brain-specific beta-synuclein as a novel blood biomarker of synaptic damage and measured the benchmarks neurofilament light chain (NfL), as a neuroaxonal injury marker, and glial fibrillary acidic protein (GFAP), as an astroglial injury marker, in patients after polytrauma with and without TBI. Compared to healthy volunteers, plasma NfL, beta-synuclein, and GFAP were significantly increased after polytrauma. The markers demonstrated highly distinct time courses, with beta-synuclein and GFAP peaking early and NfL concentrations gradually elevating during the 10-day observation period. Correlation analyses revealed a distinct influence of the extent of extracranial hemorrhage and the severity of head injury on biomarker concentrations. A combined analysis of beta-synuclein and GFAP effectively discriminated between polytrauma patients with and without TBI, despite the comparable severity of injury. Furthermore, we found a good predictive performance for fatal outcome by employing the initial plasma concentrations of NfL, beta-synuclein, and GFAP. Our findings suggest a high diagnostic value of neuronal injury markers reflecting distinct aspects of neuronal injury for the diagnosis of TBI in the complex setting of polytrauma, especially in clinical surroundings with limited imaging opportunities.
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Cocoa Extract Provides Protection against 6-OHDA Toxicity in SH-SY5Y Dopaminergic Neurons by Targeting PERK. Biomedicines 2022; 10:biomedicines10082009. [PMID: 36009556 PMCID: PMC9405838 DOI: 10.3390/biomedicines10082009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/12/2022] [Accepted: 08/15/2022] [Indexed: 11/17/2022] Open
Abstract
Parkinson’s disease (PD) represents one of the most common neurodegenerative disorders, characterized by a dopamine (DA) deficiency in striatal synapses and misfolded toxic α-synuclein aggregates with concomitant cytotoxicity. In this regard, the misfolded proteins accumulation in neurodegenerative disorders induces a remarkable perturbations of endoplasmic reticulum (ER) homeostasis leading to persistent ER stress, which in turn, effects protein synthesis, modification, and folding quality control. A large body of evidence suggests that natural products target the ER stress signaling pathway, exerting a potential action in cancers, diabetes, cardiovascular and neurodegenerative diseases. This study aims to assess the neuroprotective effect of cocoa extract and its purified fractions against a cellular model of Parkinson’s disease represented by 6-hydroxydopamine (6-OHDA)-induced SH-SY5Y human neuroblastoma. Our findings demonstrate, for the first time, the ability of cocoa to specifically targets PERK sensor, with significant antioxidant and antiapoptotic activities as both crude and fractioning extracts. In addition, cocoa also showed antiapoptotic properties in 3D cell model and a notable ability to inhibit the accumulation of α-synuclein in 6-OHDA-induced cells. Overall, these results indicate that cocoa exerts neuroprotective effects suggesting a novel possible strategy to prevent or, at least, mitigate neurodegenerative disorders, such as PD.
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Pieger K, Schmitt V, Gauer C, Gießl N, Prots I, Winner B, Winkler J, Brandstätter JH, Xiang W. Translocation of Distinct Alpha Synuclein Species from the Nucleus to Neuronal Processes during Neuronal Differentiation. Biomolecules 2022; 12:biom12081108. [PMID: 36009004 PMCID: PMC9406079 DOI: 10.3390/biom12081108] [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: 06/24/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Alpha synuclein (aSyn) and its aggregation are crucial for the neurodegeneration of Parkinson’s disease (PD). aSyn was initially described in the nucleus and presynaptic nerve terminals. However, the biology of nuclear aSyn and the link of aSyn between subcellular compartments are less understood. Current knowledge suggests the existence of various aSyn species with distinct structural and biochemical properties. Here, we identified a C-terminal-targeting aSyn antibody (Nu-aSyn-C), which has a high immunoaffinity towards aSyn in the nucleus. Comparing the Nu-aSyn-C antibody to aSyn antibodies developed against phosphorylated or aggregated forms, we observed that nuclear aSyn differs from cytosolic aSyn by an increased phosphorylation and assembly level in proliferating cells. Employing Nu-aSyn-C, we characterized aSyn distribution during neuronal differentiation in midbrain dopaminergic neurons (mDANs) derived from human-induced pluripotent stem cells (hiPSCs) and Lund human mesencephalic cells, and in primary rat hippocampal neurons. We detected a specific translocation pattern of aSyn during neuronal differentiation from the nucleus to the soma and finally to neuronal processes. Interestingly, a remarkable shift of Nu-aSyn-C-positive species towards neurites was detected in hiPSC mDANs from a PD patient carrying aSyn gene duplication. Together, our results reveal distinct nuclear and cytosolic aSyn species that redistribute during neuronal differentiation—a process that is altered in PD-derived neurons.
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Affiliation(s)
- Katharina Pieger
- Department of Biology, Animal Physiology/Neurobiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Verena Schmitt
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Carina Gauer
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Nadja Gießl
- Department of Biology, Animal Physiology/Neurobiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Iryna Prots
- Department of Stem Cell Biology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Beate Winner
- Department of Stem Cell Biology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Jürgen Winkler
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Johann Helmut Brandstätter
- Department of Biology, Animal Physiology/Neurobiology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Wei Xiang
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054 Erlangen, Germany
- Correspondence: ; Tel.: +49-9131-85-44676
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Kong Y, Chen Z, Wang X, Wang W, Zhang J. Diagnostic Utility of Cerebrospinal Fluid α-Synuclein in Creutzfeldt-Jakob Disease: A Systematic Review and Meta-Analysis. J Alzheimers Dis 2022; 89:493-503. [PMID: 35912746 DOI: 10.3233/jad-220425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Creutzfeldt-Jakob disease (CJD) can be difficult to distinguish clinically from some non-prion neurological diseases. Previous studies have reported markedly increased levels of α-synuclein in cerebrospinal fluid (CSF) of CJD patients, indicating that it is a potential diagnostic biomarker. OBJECTIVE The aim of this study was to assess the diagnostic power of CSF α-synuclein in discriminating CJD from non-prion disorders. METHODS The Ovid MEDLINE, Cochrane, and Embase databases were searched for articles published on or before February 25, 2022, using the search term (prion diseases OR Creutzfeldt-Jakob syndrome) AND (synuclein OR α-synuclein). The difference in CSF α-synuclein levels between CJD and non-prion diseases was calculated using random-effects models (I2 > 50%) or fixed-effects models (I2 < 50%) in terms of standardized mean difference (SMD) and 95% confidence interval (CI). The publication bias was estimated using funnel plots and the Egger's test. RESULTS Ten studies were included in this study. The concentrations of CSF α-synuclein were significantly higher in CJD patients compared to total non-prion controls (SMD = 1.98, 95% CI 1.60 to 2.36, p < 0.00001), tauopathies (SMD = 1.34, 95% CI 0.99 to 1.68, p < 0.00001), synucleinopathies (SMD = 1.78, 95% CI 1.11 to 2.44, p < 0.00001), or Alzheimer's (SMD = 1.14, 95% CI 0.95 to 1.33, p < 0.00001). CSF α-synuclein could distinguish CJD from non-prion diseases with overall sensitivity of 89% (95% CI 80-95%), specificity of 92% (95% CI 86-95%), and AUC of 0.96 (95% CI: 0.94-0.97). CONCLUSION CSF α-synuclein has excellent diagnostic value in discriminating CJD from non-prion neurological diseases. Given the high heterogeneity among the included studies, further studies are needed to confirm its clinical utility.
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Affiliation(s)
- Yu Kong
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Zhongyun Chen
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Xue Wang
- Department of Library, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Wenjiao Wang
- Department of Library, Xuanwu Hospital, Capital Medical University, Beijing, China
| | - Jing Zhang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China
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Atarod D, Mamashli F, Ghasemi A, Moosavi-Movahedi F, Pirhaghi M, Nedaei H, Muronetz V, Haertlé T, Tatzelt J, Riazi G, Saboury AA. Bivalent metal ions induce formation of α-synuclein fibril polymorphs with different cytotoxicities. Sci Rep 2022; 12:11898. [PMID: 35831343 PMCID: PMC9279330 DOI: 10.1038/s41598-022-15472-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Accepted: 06/24/2022] [Indexed: 11/18/2022] Open
Abstract
α-Synuclein (α-Syn) aggregates are key components of intracellular inclusion bodies characteristic of Parkinson’s disease (PD) and other synucleinopathies. Metal ions have been considered as the important etiological factors in PD since their interactions with α-Syn alter the kinetics of fibrillation. In the present study, we have systematically explored the effects of Zn2+, Cu2+, Ca2+, and Mg2+ cations on α-Syn fibril formation. Specifically, we determined fibrillation kinetics, size, morphology, and secondary structure of the fibrils and their cytotoxic activity. While all cations accelerate fibrillation, we observed distinct effects of the different ions. For example, Zn2+ induced fibrillation by lower tlag and higher kapp and formation of shorter fibrils, while Ca2+ ions lead to formation of longer fibrils, as evidenced by dynamic light scattering and atomic force microscopy studies. Additionally, the morphology of formed fibrils was different. Circular dichroism and attenuated total reflection-Fourier transform infrared spectroscopies revealed higher contents of β-sheets in fibrils. Interestingly, cell viability studies indicated nontoxicity of α-Syn fibrils formed in the presence of Zn2+ ions, while the fibrils formed in the presence of Cu2+, Ca2+, and Mg2+ were cytotoxic. Our results revealed that α-Syn fibrils formed in the presence of different divalent cations have distinct structural and cytotoxic features.
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Affiliation(s)
- Deyhim Atarod
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Fatemeh Mamashli
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Atiyeh Ghasemi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | | | - Mitra Pirhaghi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Hadi Nedaei
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - Vladimir Muronetz
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia, 119991
| | - Thomas Haertlé
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.,National Institute of Agronomic and Environmental Research, 44316, Nantes, France
| | - Jörg Tatzelt
- Department Biochemistry of Neurodegenerative Diseases, Institute of Biochemistry and Pathobiochemistry, Ruhr University Bochum, Bochum, Germany.,Cluster of Excellence RESOLV, Ruhr University Bochum, Bochum, Germany
| | - Gholamhossein Riazi
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
| | - Ali Akbar Saboury
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.
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46
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Zhang F, Wu Z, Long F, Tan J, Gong N, Li X, Lin C. The Roles of ATP13A2 Gene Mutations Leading to Abnormal Aggregation of α-Synuclein in Parkinson’s Disease. Front Cell Neurosci 2022; 16:927682. [PMID: 35875356 PMCID: PMC9296842 DOI: 10.3389/fncel.2022.927682] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Accepted: 06/13/2022] [Indexed: 11/13/2022] Open
Abstract
Parkinson’s disease (PD) is the second most common neurodegenerative disease. PARK9 (also known as ATP13A2) is recognized as one of the key genes that cause PD, and a mutation in this gene was first discovered in a rare case of PD in an adolescent. Lewy bodies (LBs) formed by abnormal aggregation of α-synuclein, which is encoded by the SNCA gene, are one of the pathological diagnostic criteria for PD. LBs are also recognized as one of the most important features of PD pathogenesis. In this article, we first summarize the types of mutations in the ATP13A2 gene and their effects on ATP13A2 mRNA and protein structure; then, we discuss lysosomal autophagy inhibition and the molecular mechanism of abnormal α-synuclein accumulation caused by decreased levels and dysfunction of the ATP13A2 protein in lysosomes. Finally, this article provides a new direction for future research on the pathogenesis and therapeutic targets for ATP13A2 gene-related PD from the perspective of ATP13A2 gene mutations and abnormal aggregation of α-synuclein.
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Affiliation(s)
- Fan Zhang
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Zhiwei Wu
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Fei Long
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Jieqiong Tan
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
- Key Laboratory of Molecular Precision Medicine of Hunan Province, Center for Medical Genetics, Institute of Molecular Precision Medicine, Xiangya Hospital of Central South University, Changsha, China
| | - Ni Gong
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Xiaorong Li
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
| | - Changwei Lin
- Department of Gastrointestinal Surgery, The Third Xiangya Hospital of Central South University, Changsha, China
- Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, China
- *Correspondence: Changwei Lin, orcid.org/0000-0003-1676-0912
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Guzzo A, Delarue P, Rojas A, Nicolaï A, Maisuradze GG, Senet P. Wild-Type α-Synuclein and Variants Occur in Different Disordered Dimers and Pre-Fibrillar Conformations in Early Stage of Aggregation. Front Mol Biosci 2022; 9:910104. [PMID: 35836937 PMCID: PMC9273784 DOI: 10.3389/fmolb.2022.910104] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 05/16/2022] [Indexed: 12/15/2022] Open
Abstract
α-Synuclein is a 140 amino-acid intrinsically disordered protein mainly found in the brain. Toxic α-synuclein aggregates are the molecular hallmarks of Parkinson’s disease. In vitro studies showed that α-synuclein aggregates in oligomeric structures of several 10th of monomers and into cylindrical structures (fibrils), comprising hundred to thousands of proteins, with polymorphic cross-β-sheet conformations. Oligomeric species, formed at the early stage of aggregation remain, however, poorly understood and are hypothezised to be the most toxic aggregates. Here, we studied the formation of wild-type (WT) and mutant (A30P, A53T, and E46K) dimers of α-synuclein using coarse-grained molecular dynamics. We identified two principal segments of the sequence with a higher propensity to aggregate in the early stage of dimerization: residues 36–55 and residues 66–95. The transient α-helices (residues 53–65 and 73–82) of α-synuclein monomers are destabilized by A53T and E46K mutations, which favors the formation of fibril native contacts in the N-terminal region, whereas the helix 53–65 prevents the propagation of fibril native contacts along the sequence for the WT in the early stages of dimerization. The present results indicate that dimers do not adopt the Greek key motif of the monomer fold in fibrils but form a majority of disordered aggregates and a minority (9–15%) of pre-fibrillar dimers both with intra-molecular and intermolecular β-sheets. The percentage of residues in parallel β-sheets is by increasing order monomer < disordered dimers < pre-fibrillar dimers. Native fibril contacts between the two monomers are present in the NAC domain for WT, A30P, and A53T and in the N-domain for A53T and E46K. Structural properties of pre-fibrillar dimers agree with rupture-force atomic force microscopy and single-molecule Förster resonance energy transfer available data. This suggests that the pre-fibrillar dimers might correspond to the smallest type B toxic oligomers. The probability density of the dimer gyration radius is multi-peaks with an average radius that is 10 Å larger than the one of the monomers for all proteins. The present results indicate that even the elementary α-synuclein aggregation step, the dimerization, is a complicated phenomenon that does not only involve the NAC region.
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Affiliation(s)
- Adrien Guzzo
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, Dijon, France
| | - Patrice Delarue
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, Dijon, France
| | - Ana Rojas
- Schrödinger, Inc., New York, NY, United States
| | - Adrien Nicolaï
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, Dijon, France
| | - Gia G. Maisuradze
- Baker Laboratory of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, United States
| | - Patrick Senet
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université de Bourgogne Franche-Comté, Dijon, France
- Baker Laboratory of Chemistry and Chemical Biology, Cornell University, Ithaca, NY, United States
- *Correspondence: Patrick Senet,
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Kulkarni AS, Burns MR, Brundin P, Wesson DW. Linking α-synuclein-induced synaptopathy and neural network dysfunction in early Parkinson's disease. Brain Commun 2022; 4:fcac165. [PMID: 35822101 PMCID: PMC9272065 DOI: 10.1093/braincomms/fcac165] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/11/2022] [Accepted: 06/20/2022] [Indexed: 01/18/2023] Open
Abstract
The prodromal phase of Parkinson's disease is characterized by aggregation of the misfolded pathogenic protein α-synuclein in select neural centres, co-occurring with non-motor symptoms including sensory and cognitive loss, and emotional disturbances. It is unclear whether neuronal loss is significant during the prodrome. Underlying these symptoms are synaptic impairments and aberrant neural network activity. However, the relationships between synaptic defects and network-level perturbations are not established. In experimental models, pathological α-synuclein not only impacts neurotransmission at the synaptic level, but also leads to changes in brain network-level oscillatory dynamics-both of which likely contribute to non-motor deficits observed in Parkinson's disease. Here we draw upon research from both human subjects and experimental models to propose a 'synapse to network prodrome cascade' wherein before overt cell death, pathological α-synuclein induces synaptic loss and contributes to aberrant network activity, which then gives rise to prodromal symptomology. As the disease progresses, abnormal patterns of neural activity ultimately lead to neuronal loss and clinical progression of disease. Finally, we outline goals and research needed to unravel the basis of functional impairments in Parkinson's disease and other α-synucleinopathies.
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Affiliation(s)
- Aishwarya S Kulkarni
- Department of Pharmacology & Therapeutics, University of Florida, 1200 Newell Dr, Gainesville, FL 32610, USA
| | - Matthew R Burns
- Department of Neurology, University of Florida, 1200 Newell Dr, Gainesville, FL 32610, USA
- Norman Fixel Institute for Neurological Disorders, University of Florida, 1200 Newell Dr, Gainesville, FL 32610, USA
| | - Patrik Brundin
- Pharma Research and Early Development (pRED), F. Hoffman-La Roche, Little Falls, NJ, USA
| | - Daniel W Wesson
- Department of Pharmacology & Therapeutics, University of Florida, 1200 Newell Dr, Gainesville, FL 32610, USA
- Norman Fixel Institute for Neurological Disorders, University of Florida, 1200 Newell Dr, Gainesville, FL 32610, USA
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Tarutani A, Adachi T, Akatsu H, Hashizume Y, Hasegawa K, Saito Y, Robinson AC, Mann DMA, Yoshida M, Murayama S, Hasegawa M. Ultrastructural and biochemical classification of pathogenic tau, α-synuclein and TDP-43. Acta Neuropathol 2022; 143:613-640. [PMID: 35513543 PMCID: PMC9107452 DOI: 10.1007/s00401-022-02426-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 04/12/2022] [Accepted: 04/23/2022] [Indexed: 12/20/2022]
Abstract
Intracellular accumulation of abnormal proteins with conformational changes is the defining neuropathological feature of neurodegenerative diseases. The pathogenic proteins that accumulate in patients' brains adopt an amyloid-like fibrous structure and exhibit various ultrastructural features. The biochemical analysis of pathogenic proteins in sarkosyl-insoluble fractions extracted from patients' brains also shows disease-specific features. Intriguingly, these ultrastructural and biochemical features are common within the same disease group. These differences among the pathogenic proteins extracted from patients' brains have important implications for definitive diagnosis of the disease, and also suggest the existence of pathogenic protein strains that contribute to the heterogeneity of pathogenesis in neurodegenerative diseases. Recent experimental evidence has shown that prion-like propagation of these pathogenic proteins from host cells to recipient cells underlies the onset and progression of neurodegenerative diseases. The reproduction of the pathological features that characterize each disease in cellular and animal models of prion-like propagation also implies that the structural differences in the pathogenic proteins are inherited in a prion-like manner. In this review, we summarize the ultrastructural and biochemical features of pathogenic proteins extracted from the brains of patients with neurodegenerative diseases that accumulate abnormal forms of tau, α-synuclein, and TDP-43, and we discuss how these disease-specific properties are maintained in the brain, based on recent experimental insights.
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Affiliation(s)
- Airi Tarutani
- Department of Brain and Neuroscience, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya-ku, Tokyo, 156-8506, Japan
| | - Tadashi Adachi
- Division of Neuropathology, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Tottori, 683-8503, Japan
| | - Hiroyasu Akatsu
- Department of Neuropathology, Choju Medical Institute, Fukushimura Hospital, Aichi, 441-8124, Japan
- Department of Community-Based Medical Education, Nagoya City University Graduate School of Medical Sciences, Aichi, 467-8601, Japan
| | - Yoshio Hashizume
- Department of Neuropathology, Choju Medical Institute, Fukushimura Hospital, Aichi, 441-8124, Japan
| | - Kazuko Hasegawa
- Division of Neurology, National Hospital Organization, Sagamihara National Hospital, Kanagawa, 252-0392, Japan
| | - Yuko Saito
- Department of Neuropathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
- Department of Pathology and Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, 187-8551, Japan
| | - Andrew C Robinson
- Faculty of Biology, Medicine and Health, School of Biological Sciences, Division of Neuroscience and Experimental Psychology, Salford Royal Hospital, The University of Manchester, Salford, M6 8HD, UK
| | - David M A Mann
- Faculty of Biology, Medicine and Health, School of Biological Sciences, Division of Neuroscience and Experimental Psychology, Salford Royal Hospital, The University of Manchester, Salford, M6 8HD, UK
| | - Mari Yoshida
- Department of Neuropathology, Institute for Medical Science of Aging, Aichi Medical University, Aichi, 480-1195, Japan
| | - Shigeo Murayama
- Department of Neuropathology, Tokyo Metropolitan Institute of Gerontology, Tokyo, 173-0015, Japan
- Brain Bank for Neurodevelopmental, Neurological and Psychiatric Disorders, United Graduate School of Child Development, Osaka University, Osaka, 565-0871, Japan
| | - Masato Hasegawa
- Department of Brain and Neuroscience, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya-ku, Tokyo, 156-8506, Japan.
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50
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Bonaccorsi di Patti MC, Angiulli E, Casini A, Vaccaro R, Cioni C, Toni M. Synuclein Analysis in Adult Xenopus laevis. Int J Mol Sci 2022; 23:ijms23116058. [PMID: 35682736 PMCID: PMC9181771 DOI: 10.3390/ijms23116058] [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: 04/09/2022] [Revised: 05/23/2022] [Accepted: 05/26/2022] [Indexed: 11/16/2022] Open
Abstract
The α-, β- and γ-synucleins are small soluble proteins expressed in the nervous system of mammals and evolutionary conserved in vertebrates. After being discovered in the cartilaginous fish Torpedo californica, synucleins have been sequenced in all vertebrates, showing differences in the number of genes and splicing isoforms in different taxa. Although α-, β- and γ-synucleins share high homology in the N-terminal sequence, suggesting their evolution from a common ancestor, the three isoforms also differ in molecular characteristics, expression levels and tissue distribution. Moreover, their functions have yet to be fully understood. Great scientific interest on synucleins mainly derives from the involvement of α-synuclein in human neurodegenerative diseases, collectively named synucleinopathies, which involve the accumulation of amyloidogenic α-synuclein inclusions in neurons and glia cells. Studies on synucleinopathies can take advantage of the development of new vertebrate models other than mammals. Moreover, synuclein expression in non-mammalian vertebrates contribute to clarify the physiological role of these proteins in the evolutionary perspective. In this paper, gene expression levels of α-, β- and γ-synucleins have been analysed in the main organs of adult Xenopus laevis by qRT-PCR. Moreover, recombinant α-, β- and γ-synucleins were produced to test the specificity of commercial antibodies against α-synuclein used in Western blot and immunohistochemistry. Finally, the secondary structure of Xenopus synucleins was evaluated by circular dichroism analysis. Results indicate Xenopus as a good model for studying synucleinopathies, and provide a useful background for future studies on synuclein functions and their evolution in vertebrates.
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Affiliation(s)
| | - Elisa Angiulli
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University, 00161 Rome, Italy; (E.A.); (C.C.)
| | - Arianna Casini
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University, 00161 Rome, Italy; (A.C.); (R.V.)
| | - Rosa Vaccaro
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University, 00161 Rome, Italy; (A.C.); (R.V.)
| | - Carla Cioni
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University, 00161 Rome, Italy; (E.A.); (C.C.)
| | - Mattia Toni
- Department of Biology and Biotechnology “Charles Darwin”, Sapienza University, 00161 Rome, Italy; (E.A.); (C.C.)
- Correspondence: (M.C.B.d.P.); (M.T.)
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