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Yin Z, Xu G, Qi Y, Tan DM, Chen EH, Ding X, Ji RY. Application of serum peptidomics for Parkinson's disease in SNCA-A30P mice. Heliyon 2023; 9:e21125. [PMID: 38125428 PMCID: PMC10730432 DOI: 10.1016/j.heliyon.2023.e21125] [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: 01/09/2023] [Revised: 07/30/2023] [Accepted: 10/16/2023] [Indexed: 12/23/2023] Open
Abstract
Intraneuronal inclusions of alpha-synuclein (α-synuclein, α-syn) are commonly found in the brain of patients with Parkinson's disease (PD). The pathogenesis of the abundant α-syn protein in the blood has been extensively studied to understand its properties better. In recent years, peptidome analysis has received increasing attention. In this study, we identified and analyzed serum peptides from wild-type (WT) and the (Thy-1)-h[A30P] alpha-synuclein transgenic mice (SNCA-A30P mice) using liquid chromatography-tandem mass spectrometry (LC-MS/MS). One thousand eight hundred fifty-six peptides from 771 proteins were analyzed. Among them, 151 peptides from 107 proteins were significantly differentially expressed. The glycoprotein VI platelet pathway (GP6) was the pathway's most significant differentially expressed signaling pathway. Cleavage sites of the differentially expressed peptides may reflect protease distribution and activity. We selected the most significantly differentially expressed peptide, VGGDPI, and found that it contained cathepsin K (Ctsk) and trypsin-1 cleavage sites, suggesting that Ctsk and trypsin-1 may be key peptidases in PD. α-syn is a protein associated with the pathogenesis of PD. mutations in several genes, including SNCA, which encodes α-syn, are associated with the development of PD. Bioinformatics analysis of the physiological pathways related to SNCA genes and apoptosis genes found the five most markedly up-regulated proteins: formin homology 2 domain-containing 1 (FHOD1), insulin receptor substrate 1(IRS1), TRPM8 channel-associated factor 1 (TCAF1), glyceraldehyde 3-phosphate dehydrogenase (GAPDH), and interleukin-16 (IL-16). Therefore, the differentially expressed peptides in the five precursor protein domains may be potential bioactive peptides associated with α-syn and apoptosis. This study provides a validated peptidomics profile of SNCA-A30P mice and identifies potentially bioactive peptides linked to α-syn and apoptosis.
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Affiliation(s)
- Zi Yin
- Department of Pharmacology, School of Medicine& Holistic Integrative Medicine, Nanjing University of Chinese Medicine, NanJing, 210023, Jiangsu, China
- College of Pharmacy and Traditional Chinese Medicine, Jiangsu College of Nursing, Huaian, 223003, Jiangsu, China
| | - Guangqiong Xu
- School of Pharmaceutical Engineering, Jiangsu Food & Pharmaceutical Science College, Huaian, 223023, Jiangsu, China
| | - Yue Qi
- Department of Pharmaceutical Technology, Jiangsu Provincial XuZhou Pharamceutical Vocational College, XuZhou, 221000, Jiangsu, China
| | - Dong-Ming Tan
- College of Pharmacy and Traditional Chinese Medicine, Jiangsu College of Nursing, Huaian, 223003, Jiangsu, China
| | - Er-Hua Chen
- College of Pharmacy and Traditional Chinese Medicine, Jiangsu College of Nursing, Huaian, 223003, Jiangsu, China
| | - Xu Ding
- College of Pharmacy and Traditional Chinese Medicine, Jiangsu College of Nursing, Huaian, 223003, Jiangsu, China
| | - Run-Yuan Ji
- Department of Analytical & Testing Center, School of Basic Medical, Nanjing Medical University, Nanjing, Jiangsu, Nanjing, Jiangsu, China
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Ekmark-Lewén S, Aniszewska A, Molisak A, Gumucio A, Lindström V, Kahle P, Nordström E, Möller C, Fälting J, Lannfelt L, Bergström J, Ingelsson M. Reduction of brain stem pathology and transient amelioration of early cognitive symptoms in transgenic mice treated with a monoclonal antibody against α-synuclein oligomers/protofibrils. AGING BRAIN 2023; 4:100086. [PMID: 37559953 PMCID: PMC10407822 DOI: 10.1016/j.nbas.2023.100086] [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: 05/23/2023] [Revised: 07/05/2023] [Accepted: 07/08/2023] [Indexed: 08/11/2023] Open
Abstract
Immunotherapy against alpha-synuclein (α-syn) is a promising novel treatment strategy for Parkinson's disease (PD) and related α-synucleinopathies. We have previously shown that systemic treatment with the monoclonal oligomer/protofibril-selective antibody mAb47 targeting cytotoxic α-syn leads to reduced central nervous system levels of such species as well as an indication of reduced late-stage symptoms in aged (Thy-1)-h[A30P] α-syn transgenic mice. Here, we performed an early-onset long-term treatment study with this antibody to evaluate effects on brain pathology and behavioral outcomes in the same mouse model. Compared to the placebo group, the treatment strongly reduced phosphorylated α-syn (pS129 α-syn) pathology in the upper brain stem. Moreover, a preserved recognition memory and risk assessment behavior could be seen in antibody-treated mice at six months of age, even although these effects were no longer significant at eleven months of age. Importantly, no evidence of inflammatory responses or other potential toxic effects was seen with the treatment. Taken together, this study supports the strategy to target α-syn oligomers/protofibrils with monoclonal antibodies to counteract early symptoms and slow down the progression of PD and other α-synucleinopathies.
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Affiliation(s)
- S. Ekmark-Lewén
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - A. Aniszewska
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - A. Molisak
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - A. Gumucio
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - V. Lindström
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - P.J. Kahle
- Department of Neurodegeneration, Hertie Institute for Clinical Brain Research and German Center for Neurodegenerative Diseases, Tübingen, Germany
| | | | | | | | - L. Lannfelt
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
- BioArctic AB, Stockholm, Sweden
| | - J. Bergström
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - M. Ingelsson
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
- Krembil Brain Institute, University Health Network, Toronto, Ontario, Canada
- Tanz Centre for Research in Neurodegenerative Diseases, Departments of Medicine and Laboratory Medicine & Pathobiology, University of Toronto, Toronto, Ontario, Canada
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Dovonou A, Bolduc C, Soto Linan V, Gora C, Peralta Iii MR, Lévesque M. Animal models of Parkinson's disease: bridging the gap between disease hallmarks and research questions. Transl Neurodegener 2023; 12:36. [PMID: 37468944 PMCID: PMC10354932 DOI: 10.1186/s40035-023-00368-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 06/19/2023] [Indexed: 07/21/2023] Open
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disorder characterized by motor and non-motor symptoms. More than 200 years after its first clinical description, PD remains a serious affliction that affects a growing proportion of the population. Prevailing treatments only alleviate symptoms; there is still neither a cure that targets the neurodegenerative processes nor therapies that modify the course of the disease. Over the past decades, several animal models have been developed to study PD. Although no model precisely recapitulates the pathology, they still provide valuable information that contributes to our understanding of the disease and the limitations of our treatment options. This review comprehensively summarizes the different animal models available for Parkinson's research, with a focus on those induced by drugs, neurotoxins, pesticides, genetic alterations, α-synuclein inoculation, and viral vector injections. We highlight their characteristics and ability to reproduce PD-like phenotypes. It is essential to realize that the strengths and weaknesses of each model and the induction technique at our disposal are determined by the research question being asked. Our review, therefore, seeks to better aid researchers by ensuring a concrete discernment of classical and novel animal models in PD research.
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Affiliation(s)
- Axelle Dovonou
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada
| | - Cyril Bolduc
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada
| | - Victoria Soto Linan
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada
| | - Charles Gora
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada
| | - Modesto R Peralta Iii
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada
| | - Martin Lévesque
- CERVO Brain Research Centre, 2601, Chemin de la Canardière, Québec, QC, G1J 2G3, Canada.
- Department of Psychiatry and Neurosciences, Faculty of Medicine, Université Laval, Québec, QC, Canada.
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Xylaki M, Paiva I, Al-Azzani M, Gerhardt E, Jain G, Islam MR, Vasili E, Wassouf Z, Schulze-Hentrich JM, Fischer A, Outeiro TF. miR-101a-3p Impairs Synaptic Plasticity and Contributes to Synucleinopathy. JOURNAL OF PARKINSON'S DISEASE 2023; 13:179-196. [PMID: 36744345 PMCID: PMC10041420 DOI: 10.3233/jpd-225055] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Synucleinopathies are disorders characterized by the abnormal accumulation of α-synuclein (aSyn). Synaptic compromise is observed in synucleinopathies parallel to aSyn aggregation and is accompanied by transcript deregulation. OBJECTIVE We sought to identify microRNAs associated with synaptic processes that may contribute to synaptic dysfunction and degeneration in synucleinopathies. METHODS We performed small RNA-sequencing of midbrain from 6-month-old transgenic mice expressing A30P mutant aSyn, followed by comparative expression analysis. We then used real-time quantitative polymerase chain reaction (qPCR) for validation. Functional analysis was performed in primary neurons by biochemical assays and imaging. RESULTS We found several deregulated biological processes linked to the synapse. miR-101a-3p was validated as a synaptic miRNA upregulated in aSyn Tg mice and in the cortex of dementia with Lewy bodies patients. Mice and primary cultured neurons overexpressing miR-101a-3p showed downregulation of postsynaptic proteins GABA Ab2 and SAPAP3 and altered dendritic morphology resembling synaptic plasticity impairments and/or synaptic damage. Interestingly, primary cultured neuron exposure to recombinant wild-type aSyn species efficiently increased miR-101a-3p levels. Finally, a dynamic role of miR-101a-3p in synapse plasticity was shown by identifying downregulation of miR-101a-3p in a condition of enhanced synaptic plasticity modelled in Wt animals housed in enriched environment. CONCLUSION To conclude, we correlated pathologic aSyn with high levels of miR-101a-3p and a novel dynamic role of the miRNA in synaptic plasticity.
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Affiliation(s)
- Mary Xylaki
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
| | - Isabel Paiva
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
- Present address: Laboratory of Cognitive and Adaptive Neuroscience, UMR 7364 (CNRS/ Strasbourg University), Strasbourg, France
| | - Mohammed Al-Azzani
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
| | - Ellen Gerhardt
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
| | - Gaurav Jain
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Centre for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Md Rezaul Islam
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Centre for Neurodegenerative Diseases (DZNE), Göttingen, Germany
| | - Eftychia Vasili
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
| | - Zinah Wassouf
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
| | | | - André Fischer
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Centre for Neurodegenerative Diseases (DZNE), Göttingen, Germany
- Department of Psychiatry and Psychotherapy, University Medical Centre, Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
| | - Tiago Fleming Outeiro
- Department of Experimental Neurodegeneration, Centre for Biostructural Imaging of Neurodegeneration, University Medical Centre Göttingen, Göttingen, Germany
- Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Framlington Place, Newcastle Upon Tyne, UK
- Scientific employee with an honorary contract at German Centre for Neurodegenerative Diseases (DZNE), Göttingen, Germany
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5
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Lindberg FA, Roman E, Fredriksson R. Behavioral profiling of SLC38A10 knockout mice using the multivariate concentric square field TM test. Front Behav Neurosci 2022; 16:987037. [PMID: 36620864 PMCID: PMC9815452 DOI: 10.3389/fnbeh.2022.987037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 12/06/2022] [Indexed: 12/24/2022] Open
Abstract
Introduction SLC38A10 is a gene that encodes the SLC38A10 protein, also known as SNAT10. The SLC38 family is evolutionary old, and SLC38A10 is one of the oldest members of the family. It is ubiquitously expressed, and its substrates are glutamine, glutamate, alanine, aspartate, and serine. However, little is known about its biological importance. Methods In the current study, an SLC38A10 knockout mouse was run in the multivariate concentric square field TM (MCSF) test. The MCSF test gives the mouse a choice of areas to explore; sheltered areas, elevated and illuminated areas, or open spaces, and a behavioral profile is obtained. The multivariate data obtained were analyzed (i) for each parameter, (ii) parameters grouped into functional categories, and (iii) with a principal component analysis. Results In the trend analysis, knockout mice had a decreased exploratory behavior compared to controls but did not show a distinct grouping in the principal component analysis. Discussion There was not a pronounced difference in the behavioral profile in SLC38A10 knockout mice compared to their wild-type controls, although subtle alterations in zones associated with exploratory behavior and risk assessment in female and male knockout mice, respectively, could be observed. These results imply that a loss of function of the SLC38A10 protein in mice does not drastically alter behavior in the MSCF test.
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Affiliation(s)
- Frida A. Lindberg
- Department of Pharmaceutical Biosciences, Molecular Neuropharmacology, Uppsala University, Uppsala, Sweden,*Correspondence: Frida A. Lindberg,
| | - Erika Roman
- Neuropharmacology and Addiction, Uppsala University, Uppsala, Sweden,Division of Anatomy and Physiology, Department of Anatomy, Physiology and Biochemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Robert Fredriksson
- Department of Pharmaceutical Biosciences, Molecular Neuropharmacology, Uppsala University, Uppsala, Sweden
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Aniszewska A, Bergström J, Ingelsson M, Ekmark-Lewén S. Modeling Parkinson's disease-related symptoms in alpha-synuclein overexpressing mice. Brain Behav 2022; 12:e2628. [PMID: 35652155 PMCID: PMC9304846 DOI: 10.1002/brb3.2628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/08/2022] [Accepted: 04/15/2022] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Intracellular deposition of alpha-synuclein (α-syn) as Lewy bodies and Lewy neurites is a central event in the pathogenesis of Parkinson's disease (PD) and other α-synucleinopathies. Transgenic mouse models overexpressing human α-syn, are useful research tools in preclinical studies of pathogenetic mechanisms. Such mice develop α-syn inclusions as well as neurodegeneration with a topographical distribution that varies depending on the choice of promoter and which form of α-syn that is overexpressed. Moreover, they display motor symptoms and cognitive disturbances that to some extent resemble the human conditions. PURPOSE One of the main motives for assessing behavior in these mouse models is to evaluate the potential of new treatment strategies, including their impact on motor and cognitive symptoms. However, due to a high within-group variability with respect to such features, the behavioral studies need to be applied with caution. In this review, we discuss how to make appropriate choices in the experimental design and which tests that are most suitable for the evaluation of PD-related symptoms in such studies. METHODS We have evaluated published results on two selected transgenic mouse models overexpressing wild type (L61) and mutated (A30P) α-syn in the context of their validity and utility for different types of behavioral studies. CONCLUSIONS By applying appropriate behavioral tests, α-syn transgenic mouse models provide an appropriate experimental platform for studies of symptoms related to PD and other α-synucleinopathies.
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Affiliation(s)
- Agata Aniszewska
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Joakim Bergström
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden.,Krembil Brain Institute, University Health Network, Toronto, Ontario, Canada.,Department of Medicine and Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Ontario, Canada
| | - Sara Ekmark-Lewén
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
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7
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Song B, Feldmann JW, Cao S, Feitosa M, Kong Y, Kim W, Schweitzer A, Leblanc P, Schweitzer JS, Kim KS. A Pitx3-deficient developmental mouse model for fine motor, olfactory, and gastrointestinal symptoms of Parkinson's disease. Neurobiol Dis 2022; 170:105777. [PMID: 35636646 PMCID: PMC9425627 DOI: 10.1016/j.nbd.2022.105777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/01/2022] [Accepted: 05/21/2022] [Indexed: 10/26/2022] Open
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8
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Roshanbin S, Xiong M, Hultqvist G, Söderberg L, Zachrisson O, Meier S, Ekmark-Lewén S, Bergström J, Ingelsson M, Sehlin D, Syvänen S. In vivo imaging of alpha-synuclein with antibody-based PET. Neuropharmacology 2022; 208:108985. [PMID: 35149134 DOI: 10.1016/j.neuropharm.2022.108985] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 01/05/2022] [Accepted: 02/02/2022] [Indexed: 12/11/2022]
Abstract
The protein alpha-synuclein (αSYN) plays a central role in synucleinopathies such as Parkinsons's disease (PD) and multiple system atrophy (MSA). Presently, there are no selective αSYN positron emission tomography (PET) radioligands that do not also show affinity to amyloid-beta (Aβ). We have previously shown that radiolabeled antibodies, engineered to enter the brain via the transferrin receptor (TfR), is a promising approach for PET imaging of intrabrain targets. In this study, we used this strategy to visualize αSYN in the living mouse brain. Five bispecific antibodies, binding to both the murine TfR and αSYN were generated and radiolabeled with iodine-125 or iodine-124. All bispecific antibodies bound to αSYN and mTfR before and after radiolabelling in an ELISA assay, and bound to brain sections prepared from αSYN overexpressing mice as well as human PD- and MSA subjects, but not control tissues in autoradiography. Brain concentrations of the bispecific antibodies were between 26-63 times higher than the unmodified IgG format 2 h post-injection, corresponding to about 1.5% of the injected dose per gram brain tissue. Additionally, intrastriatal αSYN fibrils were visualised with PET in an αSYN deposition mouse model with one of the bispecific antibodies, [124I]RmAbSynO2-scFv8D3. However, PET images acquired in αSYN transgenic mice with verified brain pathology injected with [124I]RmAbSynO2-scFv8D3 and [124I]RmAb48-scFv8D3 showed no increase in antibody retention compared to WT mice. Despite successful imaging of deposited extracellular αSYN using a brain-penetrating antibody-based radioligand with no cross-specificity towards Aβ, this proof-of-concept study demonstrates challenges in imaging intracellular αSYN inclusions present in synucleinopathies.
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Affiliation(s)
- Sahar Roshanbin
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden.
| | - Mengfei Xiong
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Greta Hultqvist
- Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | | | | | - Silvio Meier
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Sara Ekmark-Lewén
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Joakim Bergström
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden; Department of Medicine and Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, Canada
| | - Dag Sehlin
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Stina Syvänen
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
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Klonarakis M, De Vos M, Woo E, Ralph L, Thacker JS, Gil-Mohapel J. The three sisters of fate: Genetics, pathophysiology and outcomes of animal models of neurodegenerative diseases. Neurosci Biobehav Rev 2022; 135:104541. [DOI: 10.1016/j.neubiorev.2022.104541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 11/28/2021] [Accepted: 01/13/2022] [Indexed: 02/07/2023]
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10
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Veys L, Devroye J, Lefevere E, Cools L, Vandenabeele M, De Groef L. Characterizing the Retinal Phenotype of the Thy1-h[A30P]α-syn Mouse Model of Parkinson's Disease. Front Neurosci 2021; 15:726476. [PMID: 34557068 PMCID: PMC8452874 DOI: 10.3389/fnins.2021.726476] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 08/19/2021] [Indexed: 12/30/2022] Open
Abstract
Despite decades of research, disease-modifying treatments of Parkinson’s disease (PD), the second most common neurodegenerative disease worldwide, remain out of reach. One of the reasons for this treatment gap is the incomplete understanding of how misfolded alpha-synuclein (α-syn) contributes to PD pathology. The retina, as an integral part of the central nervous system, recapitulates the PD disease processes that are typically seen in the brain, and retinal manifestations have emerged as prodromal symptoms of the disease. The timeline of PD manifestations in the visual system, however, is not fully elucidated and the underlying mechanisms are obscure. This highlights the need for new studies investigating retinal pathology, in order to propel its use as PD biomarker, and to develop validated research models to investigate PD pathogenesis. The present study pioneers in characterizing the retina of the Thy1-h[A30P]α-syn PD transgenic mouse model. We demonstrate widespread α-syn accumulation in the inner retina of these mice, of which a proportion is phosphorylated yet not aggregated. This α-syn expression coincides with inner retinal atrophy due to postsynaptic degeneration. We also reveal abnormal retinal electrophysiological responses. Absence of selective loss of melanopsin retinal ganglion cells or dopaminergic amacrine cells and inflammation indicates that the retinal manifestations in these transgenic mice diverge from their brain phenotype, and questions the specific cellular or molecular alterations that underlie retinal pathology in this PD mouse model. Nevertheless, the observed α-syn accumulation, synapse loss and functional deficits suggest that the Thy1-h[A30P]α-syn retina mimics some of the features of prodromal PD, and thus may provide a window to monitor and study the preclinical/prodromal stages of PD, PD-associated retinal disease processes, as well as aid in retinal biomarker discovery and validation.
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Affiliation(s)
- Lien Veys
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
| | - Joyce Devroye
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
| | - Evy Lefevere
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
| | - Lien Cools
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
| | - Marjan Vandenabeele
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
| | - Lies De Groef
- Research Group of Neural Circuit Development and Regeneration, Department of Biology, KU Leuven, Leuven, Belgium.,Department of Biomedical Sciences, Leuven Brain Institute, Leuven, Belgium
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11
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Behere A, Thörnqvist PO, Winberg S, Ingelsson M, Bergström J, Ekmark-Lewén S. Visualization of early oligomeric α-synuclein pathology and its impact on the dopaminergic system in the (Thy-1)-h[A30P]α-syn transgenic mouse model. J Neurosci Res 2021; 99:2525-2539. [PMID: 34292621 DOI: 10.1002/jnr.24927] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 06/02/2021] [Accepted: 07/02/2021] [Indexed: 12/17/2022]
Abstract
Aggregation of alpha-synuclein (α-syn) into Lewy bodies and Lewy neurites is a pathological hallmark in the Parkinson´s disease (PD) brain. The formation of α-syn oligomers is believed to be an early pathogenic event and the A30P mutation in the gene encoding α-syn, causing familial PD, has been shown to cause an accelerated oligomerization. Due to the problem of preserving antigen conformation on tissue surfaces, α-syn oligomers are difficult to detect ex vivo using conventional immunohistochemistry with oligomer-selective antibodies. Herein, we have instead employed the previously reported α-syn oligomer proximity ligation assay (ASO-PLA), along with a wide variety of biochemical assays, to discern the pathological progression of α-syn oligomers and their impact on the dopaminergic system in male and female (Thy-1)-h[A30P]α-syn transgenic (A30P-tg) mice. Our results reveal a previously undetected abundance of α-syn oligomers in midbrain of young mice, whereas phosphorylated (pS129) and proteinase k-resistant α-syn species were observed to a larger extent in aged mice. Although we did not detect loss of dopaminergic neurons in A30P-tg mice, a dysregulation in the monoaminergic system was recorded in older mice. Taken together, ASO-PLA should be a useful method for the detection of early changes in α-syn aggregation on brain tissue, from experimental mouse models in addition to post mortem PD cases.
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Affiliation(s)
- Anish Behere
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Per-Ove Thörnqvist
- Department of Neuroscience, Physiology Unit, Uppsala University, Uppsala, Sweden
| | - Svante Winberg
- Department of Neuroscience, Physiology Unit, Uppsala University, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Joakim Bergström
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
| | - Sara Ekmark-Lewén
- Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden
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12
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Gentzel RC, Toolan D, Jinn S, Schachter JB, Ma L, Kahle PJ, Smith SM, Marcus JN. Intracranial administration of alpha-synuclein fibrils in A30P-synuclein transgenic mice causes robust synucleinopathy and microglial induction. Neurobiol Aging 2021; 106:12-25. [PMID: 34225000 DOI: 10.1016/j.neurobiolaging.2021.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 05/12/2021] [Accepted: 05/23/2021] [Indexed: 12/19/2022]
Abstract
Synucleinopathies are neurodegenerative disorders involving pathological alpha-synuclein (αSyn) protein, including dementia with Lewy bodies, multiple system atrophy and Parkinson's disease (PD). Current in vivo models of synucleinopathy include transgenic mice overexpressing αSyn variants and methods based on administration of aggregated, exogenous αSyn. Combining these techniques offers the ability to study consequences of introducing pathological αSyn into primed neuronal environments likely to develop synucleinopathy. Herein, we characterize the impacts pre-formed fibrils (PFFs) of recombinant, human αSyn have in mice overexpressing human A30P αSyn, a mutation associated with autosomal dominant PD. A30P mouse brain contains detergent insoluble αSyn biochemically similar to PD brain, and these mice develop Lewy-like synucleinopathy with age. Administration of PFFs in A30P mice resulted in regionally-specific accumulations of phosphorylated synuclein, microglial induction and a motor phenotype that differed from PFF-induced effects in wildtype mice. Surprisingly, PFF-induced losses of tyrosine hydroxylase were similar in A30P and wildtype mice. Thus, the PFF-A30P model recapitulates key aspects of synucleinopathy with induction of microglia, creating an appropriate system for evaluating neurodegenerative therapeutics.
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Affiliation(s)
- Renee C Gentzel
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Dawn Toolan
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Sarah Jinn
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Joel B Schachter
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA; Currently at Takeda Pharmaceutics, Inc., San Diego, CA, USA
| | - Lei Ma
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Philipp J Kahle
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, Hertie Institute for Clinical Brain Research and, German Center for Neurodegenerative Diseases, University of Tübingen, Germany
| | - Sean M Smith
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA
| | - Jacob N Marcus
- Neuroscience Discovery, Merck & Co., Inc., Kenilworth, NJ, USA.
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13
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Fauser M, Pan-Montojo F, Richter C, Kahle PJ, Schwarz SC, Schwarz J, Storch A, Hermann A. Chronic-Progressive Dopaminergic Deficiency Does Not Induce Midbrain Neurogenesis. Cells 2021; 10:775. [PMID: 33807497 PMCID: PMC8066763 DOI: 10.3390/cells10040775] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/26/2021] [Accepted: 03/30/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Consecutive adult neurogenesis is a well-known phenomenon in the ventricular-subventricular zone of the lateral wall of the lateral ventricles (V-SVZ) and has been controversially discussed in so-called "non-neurogenic" brain areas such as the periventricular regions (PVRs) of the aqueduct and the fourth ventricle. Dopamine is a known modulator of adult neural stem cell (aNSC) proliferation and dopaminergic neurogenesis in the olfactory bulb, though a possible interplay between local dopaminergic neurodegeneration and induction of aNSC proliferation in mid/hindbrain PVRs is currently enigmatic. OBJECTIVE/HYPOTHESIS To analyze the influence of chronic-progressive dopaminergic neurodegeneration on both consecutive adult neurogenesis in the PVRs of the V-SVZ and mid/hindbrain aNSCs in two mechanistically different transgenic animal models of Parkinson´s disease (PD). METHODS We used Thy1-m[A30P]h α synuclein mice and Leu9'Ser hypersensitive α4* nAChR mice to assess the influence of midbrain dopaminergic neuronal loss on neurogenic activity in the PVRs of the V-SVZ, the aqueduct and the fourth ventricle. RESULTS In both animal models, overall proliferative activity in the V-SVZ was not altered, though the proportion of B2/activated B1 cells on all proliferating cells was reduced in the V-SVZ in Leu9'Ser hypersensitive α4* nAChR mice. Putative aNSCs in the mid/hindbrain PVRs are known to be quiescent in vivo in healthy controls, and dopaminergic deficiency did not induce proliferative activity in these regions in both disease models. CONCLUSIONS Our data do not support an activation of endogenous aNSCs in mid/hindbrain PVRs after local dopaminergic neurodegeneration. Spontaneous endogenous regeneration of dopaminergic cell loss through resident aNSCs is therefore unlikely.
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Affiliation(s)
- Mareike Fauser
- Department of Neurology, University Medical Center Rostock, 18147 Rostock, Germany; (M.F.); (A.S.)
- Department of Neurology, Technische Universität Dresden, 01307 Dresden, Germany;
| | - Francisco Pan-Montojo
- Munich Cluster for Systems Neurology, Department of Psychiatry, University Hospital LMU, 80336 Munich, Germany;
| | - Christian Richter
- Department of Neurology, Technische Universität Dresden, 01307 Dresden, Germany;
| | - Philipp J. Kahle
- Laboratory of Functional Neurogenetics, Department of Neurodegeneration, Hertie Institute for Clinical Brain Research, 72076 Tübingen, Germany;
- German Centre for Neurodegenerative Diseases (DZNE), 72076 Tübingen, Germany
| | - Sigrid C. Schwarz
- Department of Neurology, University Hospital Leipzig, 04103 Leipzig, Germany; (S.C.S.); (J.S.)
| | - Johannes Schwarz
- Department of Neurology, University Hospital Leipzig, 04103 Leipzig, Germany; (S.C.S.); (J.S.)
- Department of Neurology, Klinik Haag i. OB, 83527 Oberbayern, Germany
| | - Alexander Storch
- Department of Neurology, University Medical Center Rostock, 18147 Rostock, Germany; (M.F.); (A.S.)
- Department of Neurology, Technische Universität Dresden, 01307 Dresden, Germany;
- German Centre for Neurodegenerative Diseases (DZNE) Rostock-Greifswald, 18147 Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock (CTNR), University Medical Center Rostock, University of Rostock, 18147 Rostock, Germany
| | - Andreas Hermann
- Department of Neurology, Technische Universität Dresden, 01307 Dresden, Germany;
- German Centre for Neurodegenerative Diseases (DZNE) Rostock-Greifswald, 18147 Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock (CTNR), University Medical Center Rostock, University of Rostock, 18147 Rostock, Germany
- Translational Neurodegeneration Section “Albrecht Kossel”, Department of Neurology, University Medical Center Rostock, 18147 Rostock, Germany
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14
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Reyes JF, Ekmark-Léwen S, Perdiki M, Klingstedt T, Hoffmann A, Wiechec E, Nilsson P, Nilsson KPR, Alafuzoff I, Ingelsson M, Hallbeck M. Accumulation of alpha-synuclein within the liver, potential role in the clearance of brain pathology associated with Parkinson's disease. Acta Neuropathol Commun 2021; 9:46. [PMID: 33743820 PMCID: PMC7980682 DOI: 10.1186/s40478-021-01136-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022] Open
Abstract
Alpha-synuclein (α-syn) aggregation is the hallmark pathological lesion in brains of patients with Parkinson's disease (PD) and related neurological disorders characterized as synucleinopathies. Accumulating evidence now indicates that α-syn deposition is also present within the gut and other peripheral organs outside the central nervous system (CNS). In the current study, we demonstrate for the first time that α-syn pathology also accumulates within the liver, the main organ responsible for substance clearance and detoxification. We further demonstrate that cultured human hepatocytes readily internalize oligomeric α-syn assemblies mediated, at least in part, by the gap junction protein connexin-32 (Cx32). Moreover, we identified a time-dependent accumulation of α-syn within the liver of three different transgenic (tg) mouse models expressing human α-syn under CNS-specific promoters, despite the lack of α-syn mRNA expression within the liver. Such a brain-to-liver transmission route could be further corroborated by detection of α-syn pathology within the liver of wild type mice one month after a single striatal α-syn injection. In contrast to the synucleinopathy models, aged mice modeling AD rarely show any amyloid-beta (Aß) deposition within the liver. In human post-mortem liver tissue, we identified cases with neuropathologically confirmed α-syn pathology containing α-syn within hepatocellular structures to a higher degree (75%) than control subjects without α-syn accumulation in the brain (57%). Our results reveal that α-syn accumulates within the liver and may be derived from the brain or other peripheral sources. Collectively, our findings indicate that the liver may play a role in the clearance and detoxification of pathological proteins in PD and related synucleinopathies.
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Affiliation(s)
- Juan F Reyes
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden.
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden.
| | - Sara Ekmark-Léwen
- Department of Public Health and Caring Sciences, Section of Geriatrics, Uppsala University, Uppsala, Sweden
| | - Marina Perdiki
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden
| | - Therése Klingstedt
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Alana Hoffmann
- Department of Molecular Neurology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Emilia Wiechec
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Otorhinolaryngology, Anesthetics, Operations and Special Surgery Center, Linköping University, 581 85, Linköping, Sweden
| | - Per Nilsson
- Department of Neurobiology, Care Sciences and Society, Center for Alzheimer Research, Division of Neurogeriatrics, Karolinska Institutet, 171 64, Solna, Sweden
| | - K Peter R Nilsson
- Department of Physics, Chemistry and Biology, Linköping University, 581 83, Linköping, Sweden
| | - Irina Alafuzoff
- Department of Pathology, Uppsala University Hospital, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Section of Geriatrics, Uppsala University, Uppsala, Sweden
| | - Martin Hallbeck
- Department of Biomedical and Clinical Sciences (BKV), Linköping University, 581 85, Linköping, Sweden
- Department of Clinical Pathology, Linköping University, 581 85, Linköping, Sweden
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15
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Tweedy C, Kindred N, Curry J, Williams C, Taylor JP, Atkinson P, Randall F, Erskine D, Morris CM, Reeve AK, Clowry GJ, LeBeau FEN. Hippocampal network hyperexcitability in young transgenic mice expressing human mutant alpha-synuclein. Neurobiol Dis 2020; 149:105226. [PMID: 33347975 PMCID: PMC7859835 DOI: 10.1016/j.nbd.2020.105226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 11/12/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023] Open
Abstract
Abnormal excitability in cortical networks has been reported in patients and animal models of Alzheimer's disease (AD), and other neurodegenerative conditions. Whether hyperexcitability is a core feature of alpha(α)-synucleinopathies, including dementia with Lewy bodies (DLB) is unclear. To assess this, we used two murine models of DLB that express either human mutant α-synuclein (α-syn) the hA30P, or human wild-type α-syn (hWT-α-syn) mice. We observed network hyperexcitability in vitro in young (2–5 months), pre-symptomatic transgenic α-syn mice. Interictal discharges (IIDs) were seen in the extracellular local field potential (LFP) in the hippocampus in hA30P and hWT-α-syn mice following kainate application, while only gamma frequency oscillations occurred in control mice. In addition, the concentration of the GABAA receptor antagonist (gabazine) needed to evoke IIDs was lower in slices from hA30P mice compared to control mice. hA30P mice also showed increased locomotor activity in the open field test compared to control mice. Intracellular recordings from CA3 pyramidal cells showed a more depolarised resting membrane potential in hA30P mice. Quadruple immunohistochemistry for human α-syn, and the mitochondrial markers, porin and the complex IV enzyme cytochrome c oxidase subunit 1 (COX1) in parvalbumin (PV+)-expressing interneurons showed that 25% of PV+ cells contained human α-syn in hA30P mice. While there was no change in PV expression, COX1 expression was significantly increased in PV+ cells in hA30P mice, perhaps reflecting a compensatory change to support PV+ interneuron activity. Our findings suggest that hippocampal network hyperexcitability may be an important early consequence of α-syn-mediated impairment of neuronal/synaptic function, which occurs without any overt loss of PV interneurons. The therapeutic benefit of targeting network excitability early in the disease stage should be explored with respect to α-synucleinopathies such as DLB. Young transgenic α-syn mice exhibit network hyperexcitability in the hippocampus in vitro. Young transgenic α-syn mice have increased locomotor activity in an open field test. Hippocampal pyramidal cells are more depolarised in young transgenic α-syn mice. Increased mitochondrial cytochrome c oxidase (complex IV) function in PV+ interneurons in young transgenic a-syn mice.
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Affiliation(s)
- Clare Tweedy
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Nathan Kindred
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Joshua Curry
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Christopher Williams
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - John-Paul Taylor
- Institute of Clinical and Translational Research, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Peter Atkinson
- Eisai Hatfield Research Laboratories, Eisai Ltd., European Knowledge Centre, Mosquito Way, Hatfield, Herts AL10 9SN, UK
| | - Fiona Randall
- Previously Eisai AiM Institute, Eisai Inc., 4 Corporate Drive, Andover, MA 01810, USA
| | - Daniel Erskine
- Institute of Clinical and Translational Research, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Christopheer M Morris
- Institute of Clinical and Translational Research, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Amy K Reeve
- Institute of Clinical and Translational Research, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Gavin J Clowry
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK
| | - Fiona E N LeBeau
- Biosciences Institute, Newcastle University, Medical School, Framlington Place, Newcastle-upon-Tyne NE2 4HH, UK.
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16
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Pingale T, Gupta GL. Classic and evolving animal models in Parkinson's disease. Pharmacol Biochem Behav 2020; 199:173060. [PMID: 33091373 DOI: 10.1016/j.pbb.2020.173060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023]
Abstract
Parkinson's disease (PD) is a progressive neurodegenerative disease with motor and non-motor symptoms. PD is characterized by the degeneration of dopaminergic neurons in the substantia nigra pars compacta (SNpc) and deficiency of dopamine in the striatal region. The primary objective in PD research is to understand the pathogenesis, targets, and development of therapeutic interventions to control the progress of the disease. The anatomical and physiological resemblances between humans and animals gathered the researcher's attention towards the use of animals in PD research. Due to varying age of onset, symptoms, and progression rate, PD becomes heterogeneous which demands the variety of animal models to study diverse features of the disease. Parkinson is a multifactorial disorder, selection of models become important as not a single model shows all the biochemical features of the disease. Currently, conventional pharmacological, neurotoxin-induced, genetically modified and cellular models are available for PD research, but none of them recapitulate all the biochemical characteristics of the disease. In this review, we included the updated knowledge on the main features of currently available in vivo and in vitro models as well as their strengths and weaknesses.
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Affiliation(s)
- Tanvi Pingale
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM'S NMIMS, V.L. Mehta Road, Vile Parle (W), Mumbai 400 056, India
| | - Girdhari Lal Gupta
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM'S NMIMS, V.L. Mehta Road, Vile Parle (W), Mumbai 400 056, India; School of Pharmacy & Technology Management, SVKM'S NMIMS, Shirpur, Maharashtra, India.
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17
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Yshii LM, Manfiolli AO, Denadai-Souza A, Kinoshita PF, Gomes MD, Scavone C. Tumor necrosis factor receptor-associated factor 6 interaction with alpha-synuclein enhances cell death through the Nuclear Factor-kB pathway. IBRO Rep 2020; 9:218-223. [PMID: 32984640 PMCID: PMC7498709 DOI: 10.1016/j.ibror.2020.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/28/2020] [Indexed: 11/30/2022] Open
Abstract
TRAF6 binds to both WT and the mutant form A30 P asyn in SH-SY5Y cell model. The activation of NF-κB leads to changes in cytokines levels induced by TRAF6 - WT asyn interaction decreasing cell viability. The interaction between TRAF6 and A30P asyn does not induce NF-κB activation and cytokine regulation in SH-SY5Y cells. The present work demonstrates a novel role of TRAF6 in the pathophysiology of Parkinson's disease.
Background Parkinson's disease (PD) is a neurodegenerative disease characterized by intracellular inclusions named Lewy bodies (LB), and alpha-synuclein (asyn) is the major component of these protein aggregates. The precise physiological and pathological roles of asyn are not fully understood. Nevertheless, asyn present in LB is ubiquitinated but fails to reach the 26S proteasome. The mutation A30 P is related to an aggressive and early-onset form of PD. Tumor necrosis factor receptor-associated factor 6 (TRAF6) is an E3 ubiquitin ligase, and it interacts and ubiquitinates the asyn in atypical chains (lysine K6, K27, K29, and K33). Methods: Here, we investigated the role of TRAF6 interaction with asyn and the involvement of nuclear factor κB (NF-κB), a key transcription factor in pro-inflammatory signaling pathway activation. Results and Conclusion We demonstrated that TRAF6 binds to both WT and the mutant form A30 P asyn in an SH-SY5Y cell model. Additionally, the interaction between TRAF6 and WT asyn induced an increase in the activation of NF-κB, leading to changes in TNF, IL-1β and IL-10 levels and culminating in reduced cell viability. Interestingly, the activation of NF-κB and gene regulation were not found in A30 P asyn. These data point to a novel role of TRAF6 in the pathophysiology of PD.
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Affiliation(s)
- Lidia M Yshii
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, 05508-900, Brazil
| | - Adriana O Manfiolli
- Department of Biochemistry and Immunology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Alexandre Denadai-Souza
- Section of Experimental Endocrinology, Department of Pharmacology, Federal University of Sao Paulo, São Paulo, 04044-020, Brazil
| | - Paula F Kinoshita
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, 05508-900, Brazil
| | - Marcelo D Gomes
- Department of Biochemistry and Immunology, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, 14049-900, Brazil
| | - Cristoforo Scavone
- Department of Pharmacology, Institute of Biomedical Science, University of São Paulo, São Paulo, 05508-900, Brazil
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18
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Ferreyra E, Pasquetta L, Ramirez A, Wille-Bille A, Molina JC, Miranda-Morales RS. Biparental care in C57BL/6J mice: effects on adolescent behavior and alcohol consumption. Psychopharmacology (Berl) 2020; 237:1841-1850. [PMID: 32173769 DOI: 10.1007/s00213-020-05501-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 03/05/2020] [Indexed: 12/18/2022]
Abstract
RATIONALE Social attachment plays an important role in offspring development. Different parenting experiences during lactation may shape offspring behavior and later alcohol use. OBJECTIVES We tested the hypothesis that differential rearing conditions (single mother, SM or biparental, BP) in the non-monogamous C57BL/6J mice may affect (1) parental behavior during lactation, (2) adolescent behavior, and (3) adolescent initiation of alcohol drinking. METHODS Mice were reared in SM or BP (cohabitation of father-mother since copulation) condition until weaning (postnatal day, PND, 21). Litters from both conditions were filmed during PNDs 6, 9, and 12 and an ethogram was made taking into account nest-, pup-, or self-directed behaviors. At PNDs, 28-29 adolescent animals were evaluated in a modified version of the concentric square field for measurement of behavioral patterns. Other groups of adolescents were tested in a 4-h daily, two-bottle choice alcohol consumption test (10% alcohol vs. water) during 3 weeks (4 days per week). RESULTS Single mothers spent less time in the nest, left unattended the nest more times, displayed more self-directed and less pup-directed behaviors than BP parents. SM-reared adolescents displayed more anxiogenic-like and less risk-associated behaviors than BP counterparts. The alcohol consumption test indicated a strong effect of rearing condition. Since the fifth day of test, SM adolescents consumed more quantities of alcohol than BP adolescents. CONCLUSIONS During single-mother parenting, pups are left unattended more often, and during adolescence, these organisms exhibited increased anxiety responses. This behavioral phenotype may act as a risk factor for alcohol initiation during adolescence.
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Affiliation(s)
- Eliana Ferreyra
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina
| | - Lucila Pasquetta
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina
| | - Abraham Ramirez
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina
| | - Aranza Wille-Bille
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina
| | - Juan Carlos Molina
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina.,Facultad de Psicología, Universidad Nacional de Córdoba, 5000, Córdoba, Argentina
| | - Roberto Sebastián Miranda-Morales
- Instituto de Investigación Médica Mercedes y Martín Ferreyra (INIMEC-CONICET-Universidad Nacional de Córdoba), Friuli 2434, 5016, Córdoba, Argentina. .,Facultad de Psicología, Universidad Nacional de Córdoba, 5000, Córdoba, Argentina.
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19
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Trichloroethylene and its metabolite TaClo lead to degeneration of substantia nigra dopaminergic neurones: Effects in wild type and human A30P mutant α-synuclein mice. Neurosci Lett 2019; 711:134437. [PMID: 31422098 PMCID: PMC6892271 DOI: 10.1016/j.neulet.2019.134437] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 11/24/2022]
Abstract
Parkinson's disease (PD) is characterised pathologically by degeneration of the dopaminergic (DA) neurones of the substantia nigra pars compacta (SNpc) and the presence of α-synuclein containing Lewy body inclusions. Trichloroethylene (TCE) has been suggested as a potential environmental chemical that may contribute to the development of PD, via conversion to the neurotoxin, 1-Trichloromethyl-1,2,3,4-tetrahydro-β-carboline (TaClo). We investigated the effect of an 8 week exposure to TCE or TaClo on wild type and, as an experimental model of PD, A30P mutant α-synuclein overexpressing mice using a combination of behaviour and pathology. TCE or TaClo exposure caused significant DA neuronal loss within the SNpc in both wild type and transgenic mice. Cell numbers were lower in A30P animals than wild type, however, no additive effect of TCE or TaClo exposure and A30P overexpression was found. TCE or TaClo did not appear to lead to acceleration of motor or cognitive deficits in either wild type or A30P mutant mice, potentially because of the modest reductions of DA neuronal number in the SNpc. Our results do however suggest that TCE exposure could be a possible factor in development of PD like changes following exposure.
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20
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Lundberg S, Högman C, Roman E. Adolescent Exploratory Strategies and Behavioral Types in the Multivariate Concentric Square Field TM Test. Front Behav Neurosci 2019; 13:41. [PMID: 30886574 PMCID: PMC6409336 DOI: 10.3389/fnbeh.2019.00041] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 02/14/2019] [Indexed: 12/31/2022] Open
Abstract
Adolescence is an important developmental phase with extensive changes in behavior due to remodeling of the brain and hormonal systems. Validation of animal behavioral tests in this age group is therefore of importance as differences to adult behavior are often not clarified. The aim of the present study was to investigate adolescent behavior in the multivariate concentric square fieldTM (MCSF) test and its relationship to other common behavioral tests as well as to a literature dataset of adult animals. Sixty adolescent male Wistar rats were tested in the MCSF and one of four reference tests; the elevated plus maze, the open field with or without start box, or the social play behavior test. Additionally, 12 animals were tested twice in the MCSF. When analyzing the first encounter with the MCSF test, a distinct grouping of the individuals into three behavioral types was observed. Approximately 20% of the animals had high levels of activity and an additional 20% had high levels of shelter seeking-behavior, these groups composed the outlying behavioral types named Explorers and Shelter seekers, respectively, which were distinct from the Main type of animals. When tested in the MCSF for a second time, the adolescent animals showed a recollection of the arena as they changed their behavior in relation to the first encounter. When comparing the MCSF performance to the reference tests, a relationship was found between the MCSF and the other behavioral test entailing forced exploration, while no relationship was found between the MCSF and social play. The adolescent behavioral profile was characterized by decreased risk assessment and a different activity profile than adults. In conclusion, the MCSF test is useful for profiling adolescent rats but the behavioral interpretation differs from that of adults due to differences in behavioral manifestation during adolescence and the presence of natural subgroups. Adolescent exploration shows a relationship across tests, but the MCSF gives more information than any of the other behavioral tests based on forced exploration. Further studies into the neurobiology behind the behavioral types and how different manipulations affect the distribution into the behavioral types are of interest.
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Affiliation(s)
- Stina Lundberg
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Cecilia Högman
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Erika Roman
- Neuropharmacology, Addiction and Behavior, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
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Almandoz-Gil L, Persson E, Lindström V, Ingelsson M, Erlandsson A, Bergström J. In Situ Proximity Ligation Assay Reveals Co-Localization of Alpha-Synuclein and SNARE Proteins in Murine Primary Neurons. Front Neurol 2018; 9:180. [PMID: 29623065 PMCID: PMC5874290 DOI: 10.3389/fneur.2018.00180] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 03/07/2018] [Indexed: 11/18/2022] Open
Abstract
The aggregation of alpha-synuclein (αSyn) is the pathological hallmark of Parkinson’s disease, dementia with Lewy bodies and related neurological disorders. However, the physiological function of the protein and how this function relates to its pathological effects remain poorly understood. One of the proposed roles of αSyn is to promote the soluble N-ethylmaleimide-sensitive factor attachment protein receptor (SNARE) complex assembly by binding to VAMP-2. The objective of this study was to visualize the co-localization between αSyn and the SNARE proteins (VAMP-2, SNAP-25, and syntaxin-1) for the first time using in situ proximity ligation assay (PLA). Cortical primary neurons were cultured from either non-transgenic or transgenic mice expressing human αSyn with the A30P mutation under the Thy-1 promoter. With an antibody recognizing both mouse and human αSyn, a PLA signal indicating close proximity between αSyn and the three SNARE proteins was observed both in the soma and throughout the processes. No differences in the extent of PLA signals were seen between non-transgenic and transgenic neurons. With an antibody specific against human αSyn, the PLA signal was mostly located to the soma and was only present in a few cells. Taken together, in situ PLA is a method that can be used to investigate the co-localization of αSyn and the SNARE proteins in primary neuronal cultures.
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Affiliation(s)
- Leire Almandoz-Gil
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Emma Persson
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Veronica Lindström
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Martin Ingelsson
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Anna Erlandsson
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
| | - Joakim Bergström
- Department of Public Health and Caring Sciences, Molecular Geriatrics, Uppsala University, Uppsala, Sweden
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