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Avenali M, Cerri S, Palmieri I, Ongari G, Stiuso R, Buongarzone G, Tassorelli C, Biagini T, Valente M, Cereda C, Mazza T, Gana S, Pacchetti C, Valente EM. Functional Study of SNCA p.V15A Variant: Further Linking α-Synuclein and Glucocerebrosidase. Mov Disord 2024; 39:1060-1065. [PMID: 38436488 DOI: 10.1002/mds.29736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 12/16/2023] [Accepted: 01/22/2024] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND SNCA p.V15A was reported in five families. In vitro models showed increased aggregation and seeding activity, mitochondrial damage, and apoptosis. Mutant flies had reduced flying ability and survival. OBJECTIVES To clinically and functionally evaluate SNCA p.V15A in a large Italian family with Parkinson's disease (PD). METHODS Genetic diagnosis was reached through next-generation sequencing. Pathogenicity was assessed by molecular dynamics simulation and biochemical studies on peripheral blood mononuclear cells (PBMCs). RESULTS Five siblings carried SNCA p.V15A; three developed bradykinetic-rigid PD in their 50s with rapid motor progression and variable cognitive impairment. A fourth sibling had isolated mood disturbance, whereas the fifth was still unaffected at age 47. The mutant protein showed decreased stability and an unstable folded structure. Proband's PBMCs showed elevated total and phosphorylated α-synuclein (α-syn) levels and significantly reduced glucocerebrosidase activity. CONCLUSION This study demonstrates accumulation of α-synV15A in PBMCs and strengthens the link between α-syn pathophysiology and glucocerebrosidase dysfunction. © 2024 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Micol Avenali
- Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
- Parkinson's Disease and Movement Disorders Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Silvia Cerri
- Cellular and Molecular Neurobiology Section, IRCCS Mondino Foundation, Pavia, Italy
| | | | - Gerardo Ongari
- Cellular and Molecular Neurobiology Section, IRCCS Mondino Foundation, Pavia, Italy
| | - Rita Stiuso
- Cellular and Molecular Neurobiology Section, IRCCS Mondino Foundation, Pavia, Italy
| | | | - Cristina Tassorelli
- Department of Brain and Behavioural Sciences, University of Pavia, Pavia, Italy
- Neurorehabilitation Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Tommaso Biagini
- Bioinformatics Unit, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Marialuisa Valente
- Clinical Pathology Unit, Medical Genetics Section, SS. Annunziata Hospital, ASL Taranto, Taranto, Italy
| | - Cristina Cereda
- Center of Functional Genomics and Rare Diseases, Department of Pediatrics, Buzzi Children's Hospital, Milan, Italy
| | - Tommaso Mazza
- Bioinformatics Unit, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
| | - Simone Gana
- Neurogenetics Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Claudio Pacchetti
- Parkinson's Disease and Movement Disorders Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Enza Maria Valente
- Neurogenetics Unit, IRCCS Mondino Foundation, Pavia, Italy
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
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2
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Kishore A, Sturm M, Soman Pillai K, Hakkaart C, Kalikavil Puthanveedu D, Urulangodi M, Krishnan S, Ashok Kumar Sreelatha A, Rajan R, Pal PK, Yadav R, Sarma G, Casadei N, Gasser T, Bauer P, Riess O, Sharma M. Resequencing the complete SNCA locus in Indian patients with Parkinson's disease. NPJ Parkinsons Dis 2024; 10:85. [PMID: 38622158 PMCID: PMC11018851 DOI: 10.1038/s41531-024-00676-4] [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: 05/25/2023] [Accepted: 02/29/2024] [Indexed: 04/17/2024] Open
Abstract
The genetic loci implicated in familial Parkinson's disease (PD) have limited generalizability to the Indian PD population. We tested mutations and the frequency of known mutations in the SNCA gene in a PD cohort from India. We selected 298 PD cases and 301 age-matched controls for targeted resequencing (before QC), along with 363 PD genomes of Indian ancestry and 1029 publicly available whole genomes from India as healthy controls (IndiGenomes), to determine the frequency of monogenic SNCA mutations. The raw sequence reads were analyzed using an in-house analysis pipeline, allowing the detection of small variants and structural variants using Manta. The in-depth analysis of the SNCA locus did not identify missense or structural variants, including previously identified SNCA mutations, in the Indian population. The familial forms of SNCA gene variants do not play a major role in the Indian PD population and this warrants further research in the under-represented population.
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Affiliation(s)
- Asha Kishore
- Comprehensive Care Centre for Movement Disorders, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kochi, Kerala, India
- Parkinson and Movement Disorder Centre, Centre for Excellence in Neurosciences, Aster Medcity, Kochi, Kerala, India
| | - Marc Sturm
- Institute for Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Kanchana Soman Pillai
- Parkinson and Movement Disorder Centre, Centre for Excellence in Neurosciences, Aster Medcity, Kochi, Kerala, India
| | - Christopher Hakkaart
- Institute for Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Divya Kalikavil Puthanveedu
- Comprehensive Care Centre for Movement Disorders, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kochi, Kerala, India
| | - Madhusoodanan Urulangodi
- Comprehensive Care Centre for Movement Disorders, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kochi, Kerala, India
| | - Syam Krishnan
- Comprehensive Care Centre for Movement Disorders, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kochi, Kerala, India
| | - Ashwin Ashok Kumar Sreelatha
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany
| | - Roopa Rajan
- Department of Neurology, All India Institute for Medical Sciences, New Delhi, India
| | - Pramod Kumar Pal
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Ravi Yadav
- Department of Neurology, National Institute of Mental Health and Neurosciences, Bengaluru, Karnataka, India
| | - Gangadhara Sarma
- Comprehensive Care Centre for Movement Disorders, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kochi, Kerala, India
| | - Nicolas Casadei
- Institute for Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Thomas Gasser
- Department for Neurodegenerative Diseases, Hertie Institute for Clinical Brain Research, University of Tübingen, Tübingen, Germany
- German Center for Neurodegenerative Diseases (DZNE), Tübingen, Germany
| | - Peter Bauer
- Institute for Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
- Centogene GmbH, Rostock, Germany
- University Medicine Rostock, Internal Medicine III, Hematology, Rostock, Germany
| | - Olaf Riess
- Institute for Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Manu Sharma
- Centre for Genetic Epidemiology, Institute for Clinical Epidemiology and Applied Biometry, University of Tübingen, Tübingen, Germany.
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3
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Morris HR, Spillantini MG, Sue CM, Williams-Gray CH. The pathogenesis of Parkinson's disease. Lancet 2024; 403:293-304. [PMID: 38245249 DOI: 10.1016/s0140-6736(23)01478-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 12/31/2022] [Accepted: 07/13/2023] [Indexed: 01/22/2024]
Abstract
Parkinson's disease is a progressive neurodegenerative condition associated with the deposition of aggregated α-synuclein. Insights into the pathogenesis of Parkinson's disease have been derived from genetics and molecular pathology. Biochemical studies, investigation of transplanted neurons in patients with Parkinson's disease, and cell and animal model studies suggest that abnormal aggregation of α-synuclein and spreading of pathology between the gut, brainstem, and higher brain regions probably underlie the development and progression of Parkinson's disease. At a cellular level, abnormal mitochondrial, lysosomal, and endosomal function can be identified in both monogenic and sporadic Parkinson's disease, suggesting multiple potential treatment approaches. Recent work has also highlighted maladaptive immune and inflammatory responses, possibly triggered in the gut, that accelerate the pathogenesis of Parkinson's disease. Although there are currently no disease-modifying treatments for Parkinson's disease, we now have a solid basis for the development of rational neuroprotective therapies that we hope will halt the progression of this disabling neurological condition.
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Affiliation(s)
- Huw R Morris
- Department of Clinical and Movement Neurosciences, Queen Square Institute of Neurology, University College London, London, UK; University College London Movement Disorders Centre, University College London, London, UK; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA.
| | - Maria Grazia Spillantini
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA
| | - Carolyn M Sue
- Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia; Department of Neurology, South Eastern Sydney Local Health District, Sydney, NSW, Australia; Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA; Neuroscience Research Australia, Randwick, NSW, Australia.
| | - Caroline H Williams-Gray
- John Van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
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Duan R, Liu G, Han Y, Li P, Zhang B, Liu Y. Characterization of SNCA Multiplication in Parkinson's Disease: 2 New Cases and Evaluation of the Literature. Mov Disord Clin Pract 2023; 10:1536-1541. [PMID: 37868923 PMCID: PMC10585967 DOI: 10.1002/mdc3.13852] [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: 12/08/2022] [Revised: 07/07/2023] [Accepted: 07/16/2023] [Indexed: 10/24/2023] Open
Abstract
Background Alpha-synuclein (SNCA) copy number variations (CNV) have been certified as a causative mutation in patients with familial and sporadic Parkinson's disease (PD). Case We report three SNCA duplication cases diagnosed as PD. Through whole-exome sequencing, we identified a de novo 4.56 Mb repeated region in one patient and a 2.50 Mb repeated region in familial PD with two patients. Literature review In review of previous cases, we suggest that aggressive behavior is more remarkable in CNV4 patients. Meanwhile, frequency of cognition decline and dementia were slightly increased in CNV4 patients. We also illustrate a younger onset age in offspring than parent in familial SNCA multiplication PD cases. No difference was observed in disease duration between parent and offspring generation. Conclusions Our findings demonstrated the clinical and genetic characteristics in PD with SNCA multiplication and provided strong evidence for genetic anticipation. These results may be instructive for future disease diagnosis and genetic counseling.
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Affiliation(s)
- Ruo‐Nan Duan
- Department of Neurology, Qilu HospitalCheeloo College of Medicine, Shandong UniversityJinanChina
| | - Gui‐Yu Liu
- Cheeloo College of Medicine, Shandong UniversityJinanChina
| | - Yin‐Lian Han
- Department of Neurology, Qilu HospitalCheeloo College of Medicine, Shandong UniversityJinanChina
| | - Pei‐Zheng Li
- Department of Neurology, Qilu HospitalCheeloo College of Medicine, Shandong UniversityJinanChina
| | - Bo‐Han Zhang
- Department of Neurology, Qilu HospitalCheeloo College of Medicine, Shandong UniversityJinanChina
| | - Yi‐Ming Liu
- Department of Neurology, Qilu HospitalCheeloo College of Medicine, Shandong UniversityJinanChina
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5
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Iannielli A, Luoni M, Giannelli SG, Ferese R, Ordazzo G, Fossati M, Raimondi A, Opazo F, Corti O, Prehn JHM, Gambardella S, Melki R, Broccoli V. Modeling native and seeded Synuclein aggregation and related cellular dysfunctions in dopaminergic neurons derived by a new set of isogenic iPSC lines with SNCA multiplications. Cell Death Dis 2022; 13:881. [PMID: 36261424 PMCID: PMC9581971 DOI: 10.1038/s41419-022-05330-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 10/02/2022] [Accepted: 10/07/2022] [Indexed: 11/05/2022]
Abstract
Triplication of the SNCA gene, encoding the protein alpha-Synuclein (αSyn), is a rare cause of aggressive and early-onset parkinsonism. Herein, we generated iPSCs from two siblings with a recently described compact SNCA gene triplication and suffering from severe motor impairments, psychiatric symptoms, and cognitive deterioration. Using CRISPR/Cas9 gene editing, each SNCA copy was inactivated by targeted indel mutations generating a panel of isogenic iPSCs with a decremental number from 4 down to none of functional SNCA gene alleles. We differentiated these iPSC lines in midbrain dopaminergic (DA) neuronal cultures to characterize αSyn aggregation in native and seeded conditions and evaluate its associated cellular dysfunctions. Utilizing a new nanobody-based biosensor combined with super-resolved imaging, we were able to visualize and measure αSyn aggregates in early DA neurons in unstimulated conditions. Calcium dysregulation and mitochondrial alterations were the first pathological signs detectable in early differentiated DA neuronal cultures. Accelerated αSyn aggregation was induced by exposing neurons to structurally well-characterized synthetic αSyn fibrils. 4xSNCA DA neurons showed the highest vulnerability, which was associated with high levels of oxidized DA and amplified by TAX1BP1 gene disruption. Seeded DA neurons developed large αSyn deposits whose morphology and internal constituents resembled Lewy bodies commonly observed in Parkinson's disease (PD) patient brain tissues. These findings provide strong evidence that this isogenic panel of iPSCs with SNCA multiplications offers a remarkable cellular platform to investigate mechanisms of PD and validate candidate inhibitors of native and seeded αSyn aggregation.
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Affiliation(s)
- Angelo Iannielli
- grid.5326.20000 0001 1940 4177National Research Council (CNR), Institute of Neuroscience, 20129 Milan, Italy ,grid.18887.3e0000000417581884Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Mirko Luoni
- grid.18887.3e0000000417581884Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Serena Gea Giannelli
- grid.18887.3e0000000417581884Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | | | - Gabriele Ordazzo
- grid.18887.3e0000000417581884Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Matteo Fossati
- grid.5326.20000 0001 1940 4177National Research Council (CNR), Institute of Neuroscience, 20129 Milan, Italy ,grid.417728.f0000 0004 1756 8807IRCCS Humanitas Research Hospital, via Manzoni 56, 20089 Rozzano Milan, Italy
| | - Andrea Raimondi
- grid.18887.3e0000000417581884Experimental Imaging Center, San Raffaele Scientific Institute, Milan, Italy
| | - Felipe Opazo
- grid.411984.10000 0001 0482 5331University Medical Center Göttingen, D-37073 Göttingen, Germany
| | - Olga Corti
- grid.425274.20000 0004 0620 5939Sorbonne Université, Institut du Cerveau (ICM), Inserm U1127, CNRS, UMR 7225 Paris, France
| | - Jochen H. M. Prehn
- grid.4912.e0000 0004 0488 7120Royal College of Surgeons in Ireland University of Medicine and Health Sciences, Department of Physiology and Medical Physics and SFI FutureNeuro Research Centre, 123 St. Stephen’s Green, Dublin, Ireland
| | - Stefano Gambardella
- grid.419543.e0000 0004 1760 3561IRCCS Neuromed, Pozzilli, Italy ,grid.12711.340000 0001 2369 7670Department of Biomolecular Sciences, University of Urbino “Carlo Bo,, Urbino, Italy
| | - Ronald Melki
- grid.460789.40000 0004 4910 6535Institut Francois Jacob, Molecular Imaging Center (MIRCen), Commissariat à l’Energie Atomique et aux Energies Alternatives (CEA) and Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay, Fontenay-aux-Roses, France
| | - Vania Broccoli
- grid.5326.20000 0001 1940 4177National Research Council (CNR), Institute of Neuroscience, 20129 Milan, Italy ,grid.18887.3e0000000417581884Division of Neuroscience, San Raffaele Scientific Institute, 20132 Milan, Italy
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6
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Xia N, Cabin DE, Fang F, Reijo Pera RA. Parkinson's Disease: Overview of Transcription Factor Regulation, Genetics, and Cellular and Animal Models. Front Neurosci 2022; 16:894620. [PMID: 35600613 PMCID: PMC9115107 DOI: 10.3389/fnins.2022.894620] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 04/12/2022] [Indexed: 01/21/2023] Open
Abstract
Parkinson's disease (PD) is one of the most common neurodegenerative disorders, affecting nearly 7-10 million people worldwide. Over the last decade, there has been considerable progress in our understanding of the genetic basis of PD, in the development of stem cell-based and animal models of PD, and in management of some clinical features. However, there remains little ability to change the trajectory of PD and limited knowledge of the underlying etiology of PD. The role of genetics versus environment and the underlying physiology that determines the trajectory of the disease are still debated. Moreover, even though protein aggregates such as Lewy bodies and Lewy neurites may provide diagnostic value, their physiological role remains to be fully elucidated. Finally, limitations to the model systems for probing the genetics, etiology and biology of Parkinson's disease have historically been a challenge. Here, we review highlights of the genetics of PD, advances in understanding molecular pathways and physiology, especially transcriptional factor (TF) regulators, and the development of model systems to probe etiology and potential therapeutic applications.
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Affiliation(s)
- Ninuo Xia
- Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Deborah E. Cabin
- McLaughlin Research Institute for Biomedical Sciences, Inc., Great Falls, MT, United States
| | - Fang Fang
- Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China, Hefei, China
| | - Renee A. Reijo Pera
- McLaughlin Research Institute for Biomedical Sciences, Inc., Great Falls, MT, United States
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Gene Co-expression Analysis of the Human Substantia Nigra Identifies ZNHIT1 as an SNCA Co-expressed Gene that Protects Against α-Synuclein-Induced Impairments in Neurite Growth and Mitochondrial Dysfunction in SH-SY5Y Cells. Mol Neurobiol 2022; 59:2745-2757. [PMID: 35175558 PMCID: PMC9016026 DOI: 10.1007/s12035-022-02768-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 02/03/2022] [Indexed: 11/17/2022]
Abstract
Parkinson’s disease (PD) is neurodegenerative disorder with the pathological hallmarks of progressive degeneration of midbrain dopaminergic neurons from the substantia nigra (SN), and accumulation and spread of inclusions of aggregated α-synuclein (α-Syn). Since current PD therapies do not prevent neurodegeneration, there is a need to identify therapeutic targets that can prevent α-Syn-induced reductions in neuronal survival and neurite growth. We hypothesised that genes that are normally co-expressed with the α-Syn gene (SNCA), and whose co-expression pattern is lost in PD, may be important for protecting against α-Syn-induced dopaminergic degeneration, since broken correlations can be used as an index of functional misregulation. Gene co-expression analysis of the human SN showed that nuclear zinc finger HIT-type containing 1 (ZNHIT1) is co-expressed with SNCA and that this co-expression pattern is lost in PD. Overexpression of ZNHIT1 was found to increase deposition of the H2A.Z histone variant in SH-SY5Y cells, to promote neurite growth and to prevent α-Syn-induced reductions in neurite growth and cell viability. Analysis of ZNHIT1 co-expressed genes showed significant enrichment in genes associated with mitochondrial function. In agreement, bioenergetic state analysis of mitochondrial function revealed that ZNHIT1 increased cellular ATP synthesis. Furthermore, α-Syn-induced impairments in basal respiration, maximal respiration and spare respiratory capacity were not seen in ZNHIT1-overexpressing cells. These data show that ZNHIT1 can protect against α-Syn-induced degeneration and mitochondrial dysfunction, which rationalises further investigation of ZNHIT1 as a therapeutic target for PD.
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