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Luo H, Yu X, Li P, Hu J, Li W, Li X, Chen M, Yu S. Different neurotoxicity and seeding activity between α-synuclein oligomers formed in plasma of patients with Parkinson's disease and multiple system atrophy. Neuroscience 2024; 557:1-11. [PMID: 39127345 DOI: 10.1016/j.neuroscience.2024.08.006] [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: 02/06/2024] [Revised: 07/26/2024] [Accepted: 08/06/2024] [Indexed: 08/12/2024]
Abstract
Previous studies have shown that α-synuclein (α-Syn) aggregates derived from the brains of patients with Parkinson's disease (PD) and multiple system atrophy (MSA) exhibit different phosphorylation, cytotoxicity, and seeding activity. However, the mechanism underlying the differences remains poorly understood. Here, recombinant human α-Syn was incubated in the plasma of patients with PD and MSA, and the oligomers formed in the plasma (PD-O-α-Syn and MSA-O-α-Syn) were purified and analyzed for their phosphorylation, cytotoxicity and seeding activity. In vitro assays revealed that both PD-O-α-Syn and MSA-O-α-Syn were phosphorylated at serine 129. However, the phosphorylation degree of MSA-O-α-Syn was significantly higher than that of PD-O-α-Syn. In addition, MSA-O-α-Syn exhibited stronger cytotoxicity and seeding activity compared with PD-O-α-Syn. In vivo experiments showed that mice receiving intrastriatal inoculation of MSA-O-α-Syn developed more severe motor dysfunction and dopaminergic degeneration than mice receiving intrastriatal inoculation of PD-O-α-Syn. Compared with the mice inoculated with PD-O-α-Syn, the mice inoculated with MSA-O-α-Syn accumulated more phosphorylated and oligomerized α-Syn in the striatum and brain regions (substantia nigra, hippocampus and prefrontal cortex) away from the inoculated site. The results obtained suggest that α-Syn oligomers formed in PD and MSA plasma are different in phosphorylation, cytotoxicity, and seeding activity.
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Affiliation(s)
- Hanjiang Luo
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China; Laboratory of Neuroscience, Affiliated Hospital of Guilin Medical University, Guilin 541001, Guangxi Province, China
| | - Xiaohan Yu
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Pengjie Li
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Junya Hu
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Wei Li
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Xin Li
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China
| | - Min Chen
- Laboratory of Neuroscience, Affiliated Hospital of Guilin Medical University, Guilin 541001, Guangxi Province, China.
| | - Shun Yu
- Department of Neurobiology, Xuanwu Hospital of Capital Medical University, Beijing 100053, China; National Clinical Research Center for Geriatric Disorders, Beijing 100053, China.
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Oliveira da Silva MI, Santejo M, Babcock IW, Magalhães A, Minamide LS, Won SJ, Castillo E, Gerhardt E, Fahlbusch C, Swanson RA, Outeiro TF, Taipa R, Ruff M, Bamburg JR, Liz MA. α-Synuclein triggers cofilin pathology and dendritic spine impairment via a PrP C-CCR5 dependent pathway. Cell Death Dis 2024; 15:264. [PMID: 38615035 PMCID: PMC11016063 DOI: 10.1038/s41419-024-06630-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 03/19/2024] [Accepted: 03/22/2024] [Indexed: 04/15/2024]
Abstract
Cognitive dysfunction and dementia are critical symptoms of Lewy Body dementias (LBD). Specifically, alpha-synuclein (αSyn) accumulation in the hippocampus leading to synaptic dysfunction is linked to cognitive deficits in LBD. Here, we investigated the pathological impact of αSyn on hippocampal neurons. We report that either αSyn overexpression or αSyn pre-formed fibrils (PFFs) treatment triggers the formation of cofilin-actin rods, synapse disruptors, in cultured hippocampal neurons and in the hippocampus of synucleinopathy mouse models and of LBD patients. In vivo, cofilin pathology is present concomitantly with synaptic impairment and cognitive dysfunction. Rods generation prompted by αSyn involves the co-action of the cellular prion protein (PrPC) and the chemokine receptor 5 (CCR5). Importantly, we show that CCR5 inhibition, with a clinically relevant peptide antagonist, reverts dendritic spine impairment promoted by αSyn. Collectively, we detail the cellular and molecular mechanism through which αSyn disrupts hippocampal synaptic structure and we identify CCR5 as a novel therapeutic target to prevent synaptic impairment and cognitive dysfunction in LBD.
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Grants
- R01 AG049668 NIA NIH HHS
- R01 NS105774 NINDS NIH HHS
- R43 AG071064 NIA NIH HHS
- S10 OD025127 NIH HHS
- Applicable Funding Source FEDER - Fundo Europeu de Desenvolvimento Regional funds through the COMPETE 2020 – Operacional Programme for Competitiveness and Internationalisation (POCI), Portugal 2020, and by Portuguese funds through FCT - Fundação para a Ciência e a Tecnologia/Ministério da Ciência, Tecnologia e Ensino Superior in the framework of the project POCI-01-0145-FEDER-028336 (PTDC/MED-NEU/28336/2017); National Funds through FCT – Fundação para a Ciência e a Tecnologia under the project IF/00902/2015; R&D@PhD from Luso-American Development Foundation (FLAD); FLAD Healthcare 2020; and Programme for Cooperation in Science between Portugal and Germany 2018/2019 (FCT/DAAD). Márcia A Liz is supported by CEECINST/00091/2018.
- FEDER - Fundo Europeu de Desenvolvimento Regional funds through the COMPETE 2020 – Operacional Programme for Competitiveness and Internationalisation (POCI), Portugal 2020, and by Portuguese funds through FCT - Fundação para a Ciência e a Tecnologia/Ministério da Ciência, Tecnologia e Ensino Superior in the framework of the project POCI-01-0145-FEDER-028336 (PTDC/MED-NEU/28336/2017); National Funds through FCT – Fundação para a Ciência e a Tecnologia under the project IF/00902/2015; R&D@PhD from Luso-American Development Foundation (FLAD); FLAD Healthcare 2020; and Programme for Cooperation in Science between Portugal and Germany 2018/2019 (FCT/DAAD).
- Generous gifts to the Colorado State University Development Fund (J.R.B) and by the National Institutes on Aging of the National Institutes of Health under award numbers R01AG049668, 1S10OD025127 (J.R.B), and R43AG071064 (J.R.B).
- National Institutes on Aging of the National Institutes of Health under award number RO1NS105774 (R.A.S).
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy - EXC 2067/1- 390729940) and SFB1286 (Project B8)
- Generous gifts to the Colorado State University Development Fund (J.R.B) and by the National Institutes on Aging of the National Institutes of Health under award numbers R01AG049668, 1S10OD025127 (J.R.B), R43AG071064 (J.R.B)
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Affiliation(s)
- Marina I Oliveira da Silva
- Neurodegeneration Team, Nerve Regeneration Group, IBMC -Instituto de Biologia Molecular e Celular and i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135, Porto, Portugal
| | - Miguel Santejo
- Neurodegeneration Team, Nerve Regeneration Group, IBMC -Instituto de Biologia Molecular e Celular and i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135, Porto, Portugal
| | - Isaac W Babcock
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, 80523, USA
| | - Ana Magalhães
- Addiction Biology Group, IBMC -Instituto de Biologia Molecular e Celular and i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135, Porto, Portugal
| | - Laurie S Minamide
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, 80523, USA
| | - Seok-Joon Won
- Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Erika Castillo
- Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Ellen Gerhardt
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37073, Göttingen, Germany
| | - Christiane Fahlbusch
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37073, Göttingen, Germany
| | - Raymond A Swanson
- Department of Neurology, University of California, San Francisco, CA, 94158, USA
| | - Tiago F Outeiro
- Department of Experimental Neurodegeneration, Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37073, Göttingen, Germany
- Max Planck Institute for Multidisciplinary Sciences, 37077, Göttingen, Germany
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Framlington Place, Newcastle Upon Tyne, NE2 4HH, UK
- Scientific employee with an honorary contract at Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), 37075, Göttingen, Germany
| | - Ricardo Taipa
- Neuropathology Unit, Centro Hospitalar Universitário de Santo António, 4099-001, Porto, Portugal
- Autoimmune and Neuroscience Research Group, UMIB - Unit for Multidisciplinary Research in Biomedicine, ICBAS - School of Medicine and Biomedical Sciences, University of Porto, 4050-313, Porto, Portugal
- ITR - Laboratory for Integrative and Translational Research in Population Health, 4050-600, Porto, Portugal
| | - Michael Ruff
- Creative Bio-Peptides, Rockville, MD, 20854, USA
| | - James R Bamburg
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO, 80523, USA
| | - Márcia A Liz
- Neurodegeneration Team, Nerve Regeneration Group, IBMC -Instituto de Biologia Molecular e Celular and i3S - Instituto de Investigação e Inovação em Saúde, University of Porto, 4200-135, Porto, Portugal.
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Sinclair LI, Mohr A, Morisaki M, Edmondson M, Chan S, Bone-Connaughton A, Turecki G, Love S. Is later-life depression a risk factor for Alzheimer's disease or a prodromal symptom: a study using post-mortem human brain tissue? Alzheimers Res Ther 2023; 15:153. [PMID: 37700368 PMCID: PMC10496415 DOI: 10.1186/s13195-023-01299-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 08/24/2023] [Indexed: 09/14/2023]
Abstract
BACKGROUND Depression and dementia are both common diseases. Although new cases of depression are more common in younger adults, there is a second peak at the age of 50 years suggesting a different pathological process. Late-life depression (LLD) is associated with dementia. However, it remains unclear whether depression represents a dementia prodrome or is a true risk factor for its development. LLD is thought to have a vascular component and this may be a possible link between depression and dementia. We hypothesised that later-life depression is a prodromal manifestation of dementia and would therefore be associated with more AD, and/or ischaemic brain abnormalities that are present in earlier-life depression or in age- and sex-matched controls. METHODS We assessed post-mortem orbitofrontal cortex and dorsolateral pre-frontal cortex from 145 individuals in 4 groups: 28 18-50-year-olds with depression, 30 older individuals (ages 51-90) with depression, 28 with early AD (Braak tangle stages III-IV) and 57 matched controls (17 early-life, 42 later-life). Levels of Aβ, phospho-tau and α-synuclein were assessed by immunohistochemistry and ELISA. To quantify chronic ischaemia, VEGF, MAG and PLP1 were measured by ELISA. To assess pericyte damage, PDGFRB was measured by ELISA. For blood-brain barrier leakiness, JAM-A, claudin 5 and fibrinogen were measured by ELISA. To quantity endothelial activation, the ratio of ICAM1:collagen IV was assessed by immunohistochemistry. RESULTS There was no evidence of chronic cerebral hypoperfusion or increased Aβ/tau in either depression group. There was also no indication of pericyte damage, increased blood-brain barrier leakiness or endothelial activation in the OFC or DLPFC in the depression groups. CONCLUSIONS Contrary to some previous findings, we have not found evidence of impaired vascular function or increased Aβ in LLD. Our study had a relatively small sample size and limitations in the availability of clinical data. These results suggest that depression is a risk factor for dementia rather than an early manifestation of AD or a consequence of cerebral vascular insufficiency.
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Affiliation(s)
- Lindsey I Sinclair
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK.
| | - Asher Mohr
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
| | - Mizuki Morisaki
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
| | - Martin Edmondson
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
| | - Selina Chan
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
- Douglas Institute, Department of Psychiatry, McGill University, Montreal, Canada
| | - A Bone-Connaughton
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
| | - Gustavo Turecki
- Department of Life Sciences, Warwick University, Warwick, UK
| | - Seth Love
- Dementia Research Group, Faculty of Health Sciences, University of Bristol, Southmead Hospital, Level 1 Learning & Research Building, Bristol, BS10 5NB, UK
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Abstract
Aims of the present article are: 1) assessing vestibular contribution to spatial navigation, 2) exploring how age, global positioning systems (GPS) use, and vestibular navigation contribute to subjective sense of direction (SOD), 3) evaluating vestibular navigation in patients with lesions of the vestibular-cerebellum (patients with downbeat nystagmus, DBN) that could inform on the signals carried by vestibulo-cerebellar-cortical pathways. We applied two navigation tasks on a rotating chair in the dark: return-to-start (RTS), where subjects drive the chair back to the origin after discrete angular displacement stimuli (path reversal), and complete-the-circle (CTC) where subjects drive the chair on, all the way round to origin (path completion). We examined 24 normal controls (20-83 yr), five patients with DBN (62-77 yr) and, as proof of principle, two patients with early dementia (84 and 76 yr). We found a relationship between SOD, assessed by Santa Barbara Sense of Direction Scale, and subject's age (positive), GPS use (negative), and CTC-vestibular-navigation-task (positive). Age-related decline in vestibular navigation was observed with the RTS task but not with the complex CTC task. Vestibular navigation was normal in patients with vestibulo-cerebellar dysfunction but abnormal, particularly CTC, in the demented patients. We conclude that vestibular navigation skills contribute to the build-up of our SOD. Unexpectedly, perceived SOD in the elderly is not inferior, possibly explained by increased GPS use by the young. Preserved vestibular navigation in cerebellar patients suggests that ascending vestibular-cerebellar projections carry velocity (not position) signals. The abnormalities in the cognitively impaired patients suggest that their vestibulo-spatial navigation is disrupted.NEW & NOTEWORTHY Our subjective sense-of-direction is influenced by how good we are at spatial navigation using vestibular cues. Global positioning systems (GPS) may inhibit sense of direction. Increased use of GPS by the young may explain why the elderly's sense of direction is not worse than the young's. Patients with vestibulo-cerebellar dysfunction (downbeat nystagmus syndrome) display normal vestibular navigation, suggesting that ascending vestibulo-cerebellar-cortical pathways carry velocity rather than position signals. Pilot data indicate that dementia disrupts vestibular navigation.
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Affiliation(s)
- Athena Zachou
- Neuro-otology Unit, Department of Brain Sciences, Imperial College London, Charing Cross Hospital Campus, London, United Kingdom
- 1st Department of Neurology, Eginition Hospital, National and Kapodistrian University of Athens, Greece
| | - Adolfo M Bronstein
- Neuro-otology Unit, Department of Brain Sciences, Imperial College London, Charing Cross Hospital Campus, London, United Kingdom
- 1st Department of Neurology, Eginition Hospital, National and Kapodistrian University of Athens, Greece
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Oxidative Stress and Mitochondrial Complex I Dysfunction Correlate with Neurodegeneration in an α-Synucleinopathy Animal Model. Int J Mol Sci 2022; 23:ijms231911394. [PMID: 36232716 PMCID: PMC9570254 DOI: 10.3390/ijms231911394] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/03/2022] [Accepted: 09/05/2022] [Indexed: 11/16/2022] Open
Abstract
The α-synucleinopathies constitute a subset of neurodegenerative disorders, of which Parkinson’s disease (PD) is the most common worldwide, characterized by the accumulation of misfolded α-synuclein in the cytoplasm of neurons, which spreads in a prion-like manner to anatomically interconnected brain areas. However, it is not clear how α-synucleinopathy triggers neurodegeneration. We recently developed a rat model through a single intranigral administration of the neurotoxic β-sitosterol β-D-glucoside (BSSG), which produces α-synucleinopathy. In this model, we aimed to evaluate the temporal pattern of levels in oxidative and nitrosative stress and mitochondrial complex I (CI) dysfunction and how these biochemical parameters are associated with neurodegeneration in different brain areas with α-synucleinopathy (Substantia nigra pars compacta, the striatum, in the hippocampus and the olfactory bulb, where α-syn aggregation spreads). Interestingly, an increase in oxidative stress and mitochondrial CI dysfunction accompanied neurodegeneration in those brain regions. Furthermore, in silico analysis suggests a high-affinity binding site for BSSG with peroxisome proliferator-activated receptors (PPAR) alpha (PPAR-α) and gamma (PPAR-γ). These findings will contribute to elucidating the pathophysiological mechanisms associated with α-synucleinopathies and lead to the identification of new early biomarkers and therapeutic targets.
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Nano-MgO composites containing plasmid DNA to silence SNCA gene displays neuroprotective effects in Parkinson's rats induced by 6-hydroxydopamine. Eur J Pharmacol 2022; 922:174904. [DOI: 10.1016/j.ejphar.2022.174904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 03/17/2022] [Indexed: 11/23/2022]
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Gao S, Zhou Q, Jin H, Shi N, Wang X, Zhang L, Yan M. Effect of pyrroloquinoline quinone on lipopolysaccharide-induced autophagy in HAPI microglia cells. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1377. [PMID: 34733929 PMCID: PMC8506552 DOI: 10.21037/atm-21-730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 06/04/2021] [Indexed: 12/01/2022]
Abstract
Background Pyrroloquinoline quinone (PQQ) is involved in various physiological and biochemical processes, including antioxidant, cell proliferation, and mitochondrial formation. It plays a vital role in protecting neurons. However, the effect of PQQ on microglia, an inflammatory cell of the central nervous system (CNS), is still unclear. This study aimed to investigate the biological role and neuroprotective mechanism of PQQ in HAPI microglial cells exposed to lipopolysaccharide (LPS). Methods Western blot (WB) was used to detect apoptosis and autophagy-related molecules Bax, Bcl2, active-caspase-3, caspase-3, LC3, lysosomal associated membrane protein 2 (LAMP2), AKT, tumor necrosis factor receptor (TNFR) 1, and TNFR2 expression. The phosphatidylinositol 3-kinase (PI3K)/Akt inhibitor LY294002 was used to block the Akt pathway. WB detected the effects of PI3K on autophagy and TNFR1 and TNFR2 expression. The localization of active-caspase-3, caspase-3, LC3, LAMP2, TNFR1, and TNFR2 in cells was observed by immunofluorescence staining. The effect of PQQ on the cell cycle was examined by flow cytometry. We used 5-Ethynyl-2’-deoxyuridine (EdU) assay to detect cell proliferation. The migration ability of cells under different conditions was detected by scratch test and Transwell assay. Results Our results showed that there were different effects on the apoptosis-related molecules Bcl2/Bax and active-caspase-3/caspase in HAPI microglial cells treated with PQQ at different times. PQQ had no significant effect on the LC3b/a ratio in the early stage, which was upregulated in the later stage. The expression of LAMP2 was significantly increased in both early and late stages after PQQ treatment. At the same time, we found that PQQ can reverse the translocation of LAMP2 from the cytoplasm to the nucleus in LPS-induced HAPI microglia. After PQQ treatment, TNFR1 was significantly decreased, but TNFR2 increased in LPS-induced HAPI microglia. It may be that PQQ works through the PI3K/Akt signaling pathway to up-regulate LC3, LAMP2, and TNFR1 and down-regulate TNFR2 in LPS-induced HAPI microglia. However, PQQ has little effect on LPS-induced proliferation, cell cycle, and migration of HAPI microglia. Conclusions In LPS-induced HAPI microglia, PQQ reduces the apoptosis level and increases that of autophagy. In addition, PQQ changes the distribution of LAMP2 in the cytoplasm and nucleus, which is regulated through the PI3K/Akt signaling pathway.
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Affiliation(s)
- Shumei Gao
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
| | - Qiao Zhou
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
| | - Hui Jin
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
| | - Naiqi Shi
- School of Chemistry and Molecular Biosciences, the University of Queensland, Brisbane, Queensland, Australia
| | - Xiaoyu Wang
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
| | - Li Zhang
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
| | - Meijuan Yan
- The Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, China
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Chang C, Liu JW, Chen BC, Jiang ZS, Tu CT, Su CH, Yang HH, Liu ZQ, Deng YC, Chen CY, Tsai ST, Lin SZ, Chiou TW. Transplantation of Adipose-Derived Stem Cells Alleviates Striatal Degeneration in a Transgenic Mouse Model for Multiple System Atrophy. Cell Transplant 2021; 29:963689720960185. [PMID: 33028107 PMCID: PMC7784590 DOI: 10.1177/0963689720960185] [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] [Indexed: 11/16/2022] Open
Abstract
Patients with multiple system atrophy (MSA), a progressive neurodegenerative disorder of adult onset, were found less than 9 years of life expectancy after onset. The disorders include bradykinesia and rigidity commonly seen in Parkinsonism disease and additional signs such as autonomic dysfunction, ataxia, or dementia. In clinical treatments, MSA poorly responds to levodopa, the drug used to remedy Parkinsonism disease. The exact cause of MSA is still unknown, and exploring a therapeutic solution to MSA remains critical. A transgenic mouse model was established to study the feasibility of human adipose-derived stem cell (ADSC) therapy in vivo. The human ADSCs were transplanted into the striatum of transgenic mice via intracerebral injection. As compared with sham control, we reported significantly enhanced rotarod performance of transgenic mice treated with ADSC at an effective dose, 2 × 105 ADSCs/mouse. Our ex vivo feasibility study supported that intracerebral transplantation of ADSC might alleviate striatal degeneration in MSA transgenic mouse model by improving the nigrostriatal pathway for dopamine, activating autophagy for α-synuclein clearance, decreasing inflammatory signal, and further cell apoptosis, improving myelination and cell survival at caudate-putamen.
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Affiliation(s)
- Christine Chang
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Jen-Wei Liu
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Bo Cheng Chen
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Zhe Sheng Jiang
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Chi Tang Tu
- Taiwan Mitochondrion Applied Technology Co., Ltd., Hsinchu, Taiwan, R.O.C
| | - Che Hung Su
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Hsin Han Yang
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Zong Qi Liu
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Yu Chen Deng
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Chih Yu Chen
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Sheng-Tzung Tsai
- Department of Neurosurgery, Buddhist Tzu Chi General Hospital, Hualien, Taiwan, R.O.C.,Institute of Medical Science, Tzu Chi University, Hualien, Taiwan, R.O.C
| | - Shinn Zong Lin
- Department of Neurosurgery, Buddhist Tzu Chi General Hospital, Hualien, Taiwan, R.O.C
| | - Tzyy-Wen Chiou
- Department of Life Science and Graduate Institute of Biotechnology, 63373National Dong Hwa University, Hualien, Taiwan, R.O.C
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Mechanistic roles for altered O-GlcNAcylation in neurodegenerative disorders. Biochem J 2021; 478:2733-2758. [PMID: 34297044 DOI: 10.1042/bcj20200609] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/28/2021] [Accepted: 07/01/2021] [Indexed: 01/02/2023]
Abstract
Neurodegenerative diseases such as Alzheimer's and Parkinson's remain highly prevalent and incurable disorders. A major challenge in fully understanding and combating the progression of these diseases is the complexity of the network of processes that lead to progressive neuronal dysfunction and death. An ideal therapeutic avenue is conceivably one that could address many if not all of these multiple misregulated mechanisms. Over the years, chemical intervention for the up-regulation of the endogenous posttranslational modification (PTM) O-GlcNAc has been proposed as a potential strategy to slow down the progression of neurodegeneration. Through the development and application of tools that allow dissection of the mechanistic roles of this PTM, there is now a growing body of evidence that O-GlcNAc influences a variety of important neurodegeneration-pertinent mechanisms, with an overall protective effect. As a PTM that is appended onto numerous proteins that participate in protein quality control and homeostasis, metabolism, bioenergetics, neuronal communication, inflammation, and programmed death, O-GlcNAc has demonstrated beneficence in animal models of neurodegenerative diseases, and its up-regulation is now being pursued in multiple clinical studies.
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10
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Orad RI, Shiner T. Differentiating dementia with Lewy bodies from Alzheimer's disease and Parkinson's disease dementia: an update on imaging modalities. J Neurol 2021; 269:639-653. [PMID: 33511432 DOI: 10.1007/s00415-021-10402-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 12/16/2022]
Abstract
Dementia with Lewy bodies is the second most common cause of neurodegenerative dementia after Alzheimer's disease. Dementia with Lewy bodies can provide a diagnostic challenge due to the frequent overlap of clinical signs with other neurodegenerative conditions, namely Parkinson's disease dementia, and Alzheimer's disease. Part of this clinical overlap is due to the neuropathological overlap. Dementia with Lewy bodies is characterized by the accumulation of aggregated α-synuclein protein in Lewy bodies, similar to Parkinson's disease and Parkinson's disease dementia. However, it is also frequently accompanied by aggregation of amyloid-beta and tau, the pathological hallmarks of Alzheimer's disease. Neuroimaging is central to the diagnostic process. This review is an overview of both established and evolving imaging methods that can improve diagnostic accuracy and improve management of this disorder.
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Affiliation(s)
- Rotem Iris Orad
- Cognitive Neurology Unit, Neurological Institute, Tel Aviv Sourasky Medical Center, 6, Weismann St, Tel Aviv, Israel. .,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.
| | - Tamara Shiner
- Cognitive Neurology Unit, Neurological Institute, Tel Aviv Sourasky Medical Center, 6, Weismann St, Tel Aviv, Israel.,Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel.,Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.,Movement Disorders Unit, Neurological Institute, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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11
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Clark I, Vissel B. Broader Insights into Understanding Tumor Necrosis Factor and Neurodegenerative Disease Pathogenesis Infer New Therapeutic Approaches. J Alzheimers Dis 2021; 79:931-948. [PMID: 33459706 PMCID: PMC7990436 DOI: 10.3233/jad-201186] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/11/2020] [Indexed: 12/12/2022]
Abstract
Proinflammatory cytokines such as tumor necrosis factor (TNF), with its now appreciated key roles in neurophysiology as well as neuropathophysiology, are sufficiently well-documented to be useful tools for enquiry into the natural history of neurodegenerative diseases. We review the broader literature on TNF to rationalize why abruptly-acquired neurodegenerative states do not exhibit the remorseless clinical progression seen in those states with gradual onsets. We propose that the three typically non-worsening neurodegenerative syndromes, post-stroke, post-traumatic brain injury (TBI), and post cardiac arrest, usually become and remain static because of excess cerebral TNF induced by the initial dramatic peak keeping microglia chronically activated through an autocrine loop of microglial activation through excess cerebral TNF. The existence of this autocrine loop rationalizes post-damage repair with perispinal etanercept and proposes a treatment for cerebral aspects of COVID-19 chronicity. Another insufficiently considered aspect of cerebral proinflammatory cytokines is the fitness of the endogenous cerebral anti-TNF system provided by norepinephrine (NE), generated and distributed throughout the brain from the locus coeruleus (LC). We propose that an intact LC, and therefore an intact NE-mediated endogenous anti-cerebral TNF system, plus the DAMP (damage or danger-associated molecular pattern) input having diminished, is what allows post-stroke, post-TBI, and post cardiac arrest patients a strong long-term survival advantage over Alzheimer's disease and Parkinson's disease sufferers. In contrast, Alzheimer's disease and Parkinson's disease patients remorselessly worsen, being handicapped by sustained, accumulating, DAMP and PAMP (pathogen-associated molecular patterns) input, as well as loss of the LC-origin, NE-mediated, endogenous anti-cerebral TNF system. Adrenergic receptor agonists may counter this.
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Affiliation(s)
- I.A. Clark
- Research School of Biology, Australian National University, Canberra, Australia
| | - B. Vissel
- Centre for Neuroscience and Regenerative Medicine, Faculty of Science, University of Technology, Sydney, Australia
- St. Vincent’s Centre for Applied Medical Research, Sydney, Australia
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12
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Lemos M, Stefanova N. Histone Deacetylase 6 and the Disease Mechanisms of α-Synucleinopathies. Front Synaptic Neurosci 2020; 12:586453. [PMID: 33041780 PMCID: PMC7518386 DOI: 10.3389/fnsyn.2020.586453] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 08/24/2020] [Indexed: 12/31/2022] Open
Abstract
The abnormal accumulation of α-Synuclein (α-Syn) is a prominent pathological feature in a group of diseases called α-Synucleinopathies, such as Parkinson’s disease, dementia with Lewy bodies (DLB), and multiple system atrophy (MSA). The formation of Lewy bodies (LBs) and glial cytoplasmic inclusions (GCIs) in neurons and oligodendrocytes, respectively, is highly investigated. However, the molecular mechanisms behind α-Syn improper folding and aggregation remain unclear. Histone deacetylase 6 (HDAC6) is a Class II deacetylase, containing two active catalytic domains and a ubiquitin-binding domain. The properties of HDAC6 and its exclusive cytoplasmic localization allow HDAC6 to modulate the microtubule dynamics, acting as a specific α-tubulin deacetylase. Also, HDAC6 can bind ubiquitinated proteins, facilitating the formation of the aggresome, a cellular defense mechanism to cope with higher levels of misfolded proteins. Several studies report that the aggresome shares similarities in size and composition with LBs and GCIs. HDAC6 is found to co-localize with α-Syn in neurons and in oligodendrocytes, together with other aggresome-related proteins. The involvement of HDAC6 in several neurodegenerative diseases is already under discussion, however, the results obtained by modulating HDAC6 activity are not entirely conclusive. The main goal of this review is to summarize and critically discuss previous in vitro and in vivo data regarding the specific role of HDAC6 in the context of α-Syn accumulation and protein aggregation in α-Synucleinopathies.
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Affiliation(s)
- Miguel Lemos
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - Nadia Stefanova
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
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13
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Agin A, Blanc F, Bousiges O, Villette C, Philippi N, Demuynck C, Martin-Hunyadi C, Cretin B, Lang S, Zumsteg J, Namer IJ, Heintz D. Environmental exposure to phthalates and dementia with Lewy bodies: contribution of metabolomics. J Neurol Neurosurg Psychiatry 2020; 91:968-974. [PMID: 32636213 DOI: 10.1136/jnnp-2020-322815] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/21/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND In neurodegenerative diseases, alongside genetic factors, the possible intervention of environmental factors in the pathogenesis is increasingly being considered. In particular, recent evidence suggests the intervention of a pesticide-like xenobiotic in the initiation of disease with Lewy bodies (DLB). OBJECTIVES To test for the presence of pesticides or other xenobiotics in the cerebrospinal fluid (CSF) of patients with DLB. METHODS A total of 45 patients were included in this study: 16 patients with DLB at the prodromal stage, 8 patients with DLB at the demented stage, 8 patients with Alzheimer's disease (AD) at the prodromal stage and 13 patients with AD at the demented stage. CSF was obtained by lumbar puncture and analysed by liquid chromatography-mass spectrometry. RESULTS Among the compounds detected in greater abundance in the CSF of patients with DLB compared with patients with AD, only one had a xenobiotic profile potentially related to the pathophysiology of DLB. After normalisation and scaling, bis(2-ethylhexyl) phthalate was more abundant in the CSF of patients with DLB (whole cohort: 2.7-fold abundant in DLB, p=0.031; patients with dementia: 3.8-fold abundant in DLB, p=0.001). CONCLUSIONS This study is the first reported presence of a phthalate in the CSF of patients with DLB. This molecule, which is widely distributed in the environment and enters the body orally, nasally and transdermally, was first introduced in the 1920s as a plasticizer. Thereafter, the first cases of DLB were described in the 1960s and 1970s. These observations suggest that phthalates may be involved in the pathophysiology of DLB.
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Affiliation(s)
- Arnaud Agin
- ICube laboratory, UMR 7357, team IMIS and platform IRIS, University of Strasbourg, CNRS, FMTS (Fédération de Médicine Translationnelle de Strasbourg, Strasbourg, France .,Nuclear Medicine and Molecular Imaging Department, ICANS (Institut de Cancérologie Strasbourg Europe), Strasbourg, France
| | - Frédéric Blanc
- ICube laboratory, UMR 7357, team IMIS and platform IRIS, University of Strasbourg, CNRS, FMTS (Fédération de Médicine Translationnelle de Strasbourg, Strasbourg, France.,Geriatrics Department, CM2R (Memory Resource and Research Centre), Day Hospital & Neurology Service, Neuropsychology Unit, University Hospital of Strasbourg, Strasbourg, France
| | - Olivier Bousiges
- Laboratory of Biochemistry and Molecular Biology, University Hospital of Strasbourg, Strasbourg, France
| | - Claire Villette
- Institut de Biologie Moléculaire des Plantes, Plant Imaging and Mass Spectrometry (PIMS), CNRS, University of Strasbourg, Strasbourg, France
| | - Nathalie Philippi
- ICube laboratory, UMR 7357, team IMIS and platform IRIS, University of Strasbourg, CNRS, FMTS (Fédération de Médicine Translationnelle de Strasbourg, Strasbourg, France.,Geriatrics Department, CM2R (Memory Resource and Research Centre), Day Hospital & Neurology Service, Neuropsychology Unit, University Hospital of Strasbourg, Strasbourg, France
| | - Catherine Demuynck
- Geriatrics Department, CM2R (Memory Resource and Research Centre), Day Hospital & Neurology Service, Neuropsychology Unit, University Hospital of Strasbourg, Strasbourg, France
| | - Catherine Martin-Hunyadi
- Geriatrics Department, CM2R (Memory Resource and Research Centre), Day Hospital & Neurology Service, Neuropsychology Unit, University Hospital of Strasbourg, Strasbourg, France
| | - Benjamin Cretin
- ICube laboratory, UMR 7357, team IMIS and platform IRIS, University of Strasbourg, CNRS, FMTS (Fédération de Médicine Translationnelle de Strasbourg, Strasbourg, France.,Geriatrics Department, CM2R (Memory Resource and Research Centre), Day Hospital & Neurology Service, Neuropsychology Unit, University Hospital of Strasbourg, Strasbourg, France
| | - Sabine Lang
- Institut de Biologie Moléculaire des Plantes, Plant Imaging and Mass Spectrometry (PIMS), CNRS, University of Strasbourg, Strasbourg, France
| | - Julie Zumsteg
- Institut de Biologie Moléculaire des Plantes, Plant Imaging and Mass Spectrometry (PIMS), CNRS, University of Strasbourg, Strasbourg, France
| | - Izzie Jacques Namer
- ICube laboratory, UMR 7357, team IMIS and platform IRIS, University of Strasbourg, CNRS, FMTS (Fédération de Médicine Translationnelle de Strasbourg, Strasbourg, France.,Nuclear Medicine and Molecular Imaging Department, ICANS (Institut de Cancérologie Strasbourg Europe), Strasbourg, France
| | - Dimitri Heintz
- Institut de Biologie Moléculaire des Plantes, Plant Imaging and Mass Spectrometry (PIMS), CNRS, University of Strasbourg, Strasbourg, France
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14
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Gruden’ MA, Solov’eva OA, Kudrin VS, Narkevich VB, Sherstnev VV. Neurochemical and Behavioral Features of Action of Pre-Fibrillar Oligomeric Structures of α-Sinuclein in Adult Mice. NEUROCHEM J+ 2020. [DOI: 10.1134/s1819712420010092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Abstract
Prion diseases are progressive, incurable and fatal neurodegenerative conditions. The term 'prion' was first nominated to express the revolutionary concept that a protein could be infectious. We now know that prions consist of PrPSc, the pathological aggregated form of the cellular prion protein PrPC. Over the years, the term has been semantically broadened to describe aggregates irrespective of their infectivity, and the prion concept is now being applied, perhaps overenthusiastically, to all neurodegenerative diseases that involve protein aggregation. Indeed, recent studies suggest that prion diseases (PrDs) and protein misfolding disorders (PMDs) share some common disease mechanisms, which could have implications for potential treatments. Nevertheless, the transmissibility of bona fide prions is unique, and PrDs should be considered as distinct from other PMDs.
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Affiliation(s)
- Claudia Scheckel
- Institute of Neuropathology, University of Zurich, Zurich, Switzerland
| | - Adriano Aguzzi
- Institute of Neuropathology, University of Zurich, Zurich, Switzerland.
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16
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Lipopolysaccharide-Induced Neuroinflammation as a Bridge to Understand Neurodegeneration. Int J Mol Sci 2019; 20:ijms20092293. [PMID: 31075861 PMCID: PMC6539529 DOI: 10.3390/ijms20092293] [Citation(s) in RCA: 286] [Impact Index Per Article: 57.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/03/2019] [Accepted: 05/05/2019] [Indexed: 12/19/2022] Open
Abstract
A large body of experimental evidence suggests that neuroinflammation is a key pathological event triggering and perpetuating the neurodegenerative process associated with many neurological diseases. Therefore, different stimuli, such as lipopolysaccharide (LPS), are used to model neuroinflammation associated with neurodegeneration. By acting at its receptors, LPS activates various intracellular molecules, which alter the expression of a plethora of inflammatory mediators. These factors, in turn, initiate or contribute to the development of neurodegenerative processes. Therefore, LPS is an important tool for the study of neuroinflammation associated with neurodegenerative diseases. However, the serotype, route of administration, and number of injections of this toxin induce varied pathological responses. Thus, here, we review the use of LPS in various models of neurodegeneration as well as discuss the neuroinflammatory mechanisms induced by this toxin that could underpin the pathological events linked to the neurodegenerative process.
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17
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Automated Subfield Volumetric Analysis of Hippocampus in Patients with Drug-Naïve Nondementia Parkinson's Disease. PARKINSONS DISEASE 2019; 2019:8254263. [PMID: 30854188 PMCID: PMC6378059 DOI: 10.1155/2019/8254263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 12/03/2018] [Accepted: 12/13/2018] [Indexed: 11/17/2022]
Abstract
Several studies used automated segmentation of hippocampal subfield (ASHS) for detailed measurements of anatomic subregions of the hippocampus, especially in the field of neurodegenerative disorders. In this study, we investigated the hippocampal subfield volume of patients with early-stage nondementia PD compared with normal healthy subjects using the ASHS method. A total of 32 subjects were enrolled in this study (sixteen patients with drug naive nondementia PD and sixteen healthy controls). All subjects were scanned with a 1.5 tesla MRI. The volumes of the seven subfields were calculated separately, and then, the whole hippocampal volume was calculated by the summing of CA1, CA2-3, CA4-DG, subiculum, presubiculum, and fimbria, excluding the hippocampal fissure. There were significant diagnosis-by-hemisphere interactive effects on the total hippocampal volume (F = 5.197; p=0.031) and the subfield volume of CA2-3 (F = 7.586; p=0.010) and CA4-DG (F = 7.403; p=0.011). The volumes of CA2-3 (F = 19.911; p < 0.001), CA4-DG (F = 20.273; p < 0.001), and total hippocampus (F = 10.573; p=0.005) in the left hemisphere were reduced compared to the right hemisphere. We suggest that the hippocampal volume asymmetry, especially in CA4-DG and CA2-3, could be observed in drug-naïve PD patients even in the early stage of the disease.
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18
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Do multiple system atrophy and Parkinson's disease show distinct patterns of volumetric alterations across hippocampal subfields? An exploratory study. Eur Radiol 2019; 29:4948-4956. [PMID: 30796577 DOI: 10.1007/s00330-019-06043-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 12/25/2018] [Accepted: 01/24/2019] [Indexed: 12/21/2022]
Abstract
OBJECTIVES To investigate the volumetric alterations of hippocampal subfields and identify which subfields contribute to mild cognitive impairment (MCI) in multiple system atrophy (MSA) and Parkinson's disease (PD). METHODS Thirty MSA-MCI, 26 PD-MCI, and 30 healthy controls were administered cognitive assessment, along with hippocampal segmentation using FreeSurfer 6.0 after a 3-T MRI scan. Regression analyses were performed between the volumes of hippocampal subfields and cognitive variables. RESULTS Compared with healthy controls, the volume of the hippocampal fissure was enlarged in PD-MCI patients, while left Cornu Ammonis (CA2-CA3), bilateral molecular layer, bilateral hippocampus-amygdala transition area, right subiculum, right CA1, right presubiculum, right parasubiculum, and bilateral whole hippocampus were reduced in the MSA-MCI group. Moreover, volumetric reductions of the bilateral hippocampal tail, bilateral CA1, bilateral presubiculum, bilateral molecular layer, left CA2-CA3, left hippocampus-amygdala transition area, right parasubiculum, and bilateral whole hippocampus were found in MSA-MCI relative to the PD-MCI group. The volumes of the left CA2-CA3 (B = - 11.34, p = 0.006) and left parasubiculum (B = 4.63, p = 0.01) were respectively correlated with language and abstraction functions. The volumes of the left fimbria (B = 6.99, p = 0.002) and left hippocampus-amygdala transition area (B = 2.28, p = 0.009) were correlated with visuospatial/executive function. CONCLUSIONS The MSA-MCI patients showed more widespread impairment of hippocampal subfields compared with the PD-MCI group, involving trisynaptic loop and amygdala-hippocampus interactions. The alteration of CA, hippocampus-amygdala transition area, and fimbria still requires further comparison between the two patient groups. KEY POINTS • The atrophy patterns of hippocampal subfields differed between MSA and PD patients. • MSA has widespread change in trisynaptic loop and amygdala-hippocampus interactions. • The atrophy patterns may help to understand the differences of cognitive impairment in MSA and PD.
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19
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Sherstnev VV, Solov’eva OA, Gruden’ MA, Kedrov AV, Konovalova EV, Ratmirov AM. The Effects of Fibrillar Forms of α-Synuclein Protein on Neurogenesis in the Hippocampus, Dopaminergic Neurons of the Substantia Nigra, and the Behavior of Ageing Mice. NEUROCHEM J+ 2018. [DOI: 10.1134/s1819712418040062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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20
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Das T, Hwang JJ, Poston KL. Episodic recognition memory and the hippocampus in Parkinson's disease: A review. Cortex 2018; 113:191-209. [PMID: 30660957 DOI: 10.1016/j.cortex.2018.11.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 10/02/2018] [Accepted: 11/15/2018] [Indexed: 01/09/2023]
Abstract
Parkinson's disease is a progressive neurodegenerative disorder of aging. The hallmark pathophysiology includes the development of neuronal Lewy bodies in the substantia nigra of the midbrain with subsequent loss of dopaminergic neurons. These neuronal losses lead to the characteristic motor symptoms of bradykinesia, rigidity, and rest tremor. In addition to these cardinal motor symptoms patients with PD experience a wide range of non-motor symptoms, the most important being cognitive impairments that in many circumstances lead to dementia. People with PD experience a wide range of cognitive impairments; in this review we will focus on memory impairment in PD and specifically episodic memory, which are memories of day-to-day events of life. Importantly, these memory impairments severely impact the lives of patients and caregivers alike. Traditionally episodic memory is considered to be markedly dependent on the hippocampus; therefore, it is important to understand the exact nature of PD episodic memory deficits in relation to hippocampal function and dysfunction. In this review, we discuss an aspect of episodic memory called recognition memory and its subcomponents called recollection and familiarity. Recognition memory is believed to be impaired in PD; thus, we discuss what aspects of the hippocampus are expected to be deficient in function as they relate to these recognition memory impairments. In addition to the hippocampus as a whole, we will discuss the role of hippocampal subfields in recognition memory impairments.
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Affiliation(s)
- Tanusree Das
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA.
| | - Jaclyn J Hwang
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA; Department of Neuroscience, University of Pittsburgh, USA.
| | - Kathleen L Poston
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA, USA; Department of Neurosurgery, Stanford University School of Medicine, Stanford, CA, USA.
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21
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Uribe C, Segura B, Baggio HC, Campabadal A, Abos A, Compta Y, Marti MJ, Valldeoriola F, Bargallo N, Junque C. Differential Progression of Regional Hippocampal Atrophy in Aging and Parkinson's Disease. Front Aging Neurosci 2018; 10:325. [PMID: 30364338 PMCID: PMC6193198 DOI: 10.3389/fnagi.2018.00325] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/26/2018] [Indexed: 12/16/2022] Open
Abstract
Hippocampal subfields have different vulnerability to the degenerative processes related to aging, amnestic mild cognitive impairment (MCI) and Alzheimer’s disease (AD), but the temporal evolution in Parkinson’s disease (PD) is unknown. The purposes of the current work are to describe regional hippocampal changes over time in a sample of PD patients classified according to their baseline cognitive status and to relate these changes to verbal memory loss. T1-weighted images and verbal memory assessment were obtained at two separate time points (3.8 ± 0.4 years apart) from 28 PD with normal cognition (PD-NC), 16 PD with MCI (PD-MCI) and 21 healthy controls (HCs). FreeSurfer 6.0 automated pipeline was used to segment the hippocampus into 12 bilateral subregions. Memory functions were measured with Rey’s Auditory Verbal learning test (RAVLT). We found significant reductions in cornu ammonis 1 (CA1) over time in controls as well as in PD subgroups. Right whole-hippocampal volumes showed time effects in both PD groups but not in controls. PD-NC patients also displayed time effects in the left hippocampal tail and right parasubiculum. Regression analyses showed that specific hippocampal subfield volumes at time 1 predicted almost 60% of the variability in RAVLT delayed-recall score decline. Changes in several hippocampal subregions also showed predictive value for memory loss. In conclusion, CA1 changes in PD were similar to those that occur in normal aging, but PD patients also had more decline in both anterior and posterior hippocampal segments with a more pronounced atrophy of the right hemisphere. Hippocampal segments are better predictors of changes in memory performance than whole-hippocampal volumes.
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Affiliation(s)
- Carme Uribe
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Barbara Segura
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Hospital Clínic de Barcelona, Barcelona, Spain
| | - Hugo C Baggio
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Anna Campabadal
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Alexandra Abos
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Yaroslau Compta
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Hospital Clínic de Barcelona, Barcelona, Spain.,Institute of Biomedical Research August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Parkinson's Disease and Movement Disorders Unit, Neurology Service, Hospital Clínic de Barcelona, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Maria Jose Marti
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Hospital Clínic de Barcelona, Barcelona, Spain.,Institute of Biomedical Research August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Parkinson's Disease and Movement Disorders Unit, Neurology Service, Hospital Clínic de Barcelona, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Francesc Valldeoriola
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Hospital Clínic de Barcelona, Barcelona, Spain.,Institute of Biomedical Research August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Parkinson's Disease and Movement Disorders Unit, Neurology Service, Hospital Clínic de Barcelona, Institute of Neuroscience, University of Barcelona, Barcelona, Spain
| | - Nuria Bargallo
- Centre de Diagnòstic per la Imatge, Hospital Clínic, Barcelona, Spain
| | - Carme Junque
- Medical Psychology Unit, Department of Medicine, Institute of Neuroscience, University of Barcelona, Barcelona, Spain.,Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), Hospital Clínic de Barcelona, Barcelona, Spain.,Institute of Biomedical Research August Pi i Sunyer (IDIBAPS), Barcelona, Spain
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22
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Ceftriaxone Treatment for Neuronal Deficits: A Histological and MEMRI Study in a Rat Model of Dementia with Lewy Bodies. Behav Neurol 2018; 2018:4618716. [PMID: 30154934 PMCID: PMC6092970 DOI: 10.1155/2018/4618716] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/22/2018] [Accepted: 03/12/2018] [Indexed: 11/18/2022] Open
Abstract
Dementia with Lewy bodies (DLB) is characterized by neuronal deficits and α-synuclein inclusions in the brain. Ceftriaxone (CEF), a β-lactam antibiotic, has been suggested as a therapeutic agent in several neurodegenerative disorders for its abilities to counteract glutamate-mediated toxicity and to block α-synuclein polymerization. By using manganese-enhanced magnetic resonance imaging (MEMRI) and immunohistochemistry, we measured the effects of CEF on neuronal activity and α-synuclein accumulation in the brain in a DLB rat model. The data showed that CEF corrected neuronal density and activity in the hippocampal CA1 area, suppressed hyperactivity in the subthalamic nucleus, and reduced α-synuclein accumulation, indicating that CEF is a potential agent in the treatment of DLB.
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23
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Tang BL. Unconventional Secretion and Intercellular Transfer of Mutant Huntingtin. Cells 2018; 7:cells7060059. [PMID: 29904030 PMCID: PMC6025013 DOI: 10.3390/cells7060059] [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: 05/23/2018] [Revised: 06/08/2018] [Accepted: 06/12/2018] [Indexed: 01/17/2023] Open
Abstract
The mechanism of intercellular transmission of pathological agents in neurodegenerative diseases has received much recent attention. Huntington’s disease (HD) is caused by a monogenic mutation in the gene encoding Huntingtin (HTT). Mutant HTT (mHTT) harbors a CAG repeat extension which encodes an abnormally long polyglutamine (polyQ) repeat at HTT’s N-terminus. Neuronal pathology in HD is largely due to the toxic gain-of-function by mHTT and its proteolytic products, which forms both nuclear and cytoplasmic aggregates that perturb nuclear gene transcription, RNA splicing and transport as well cellular membrane dynamics. The neuropathological effects of mHTT have been conventionally thought to be cell-autonomous in nature. Recent findings have, however, indicated that mHTT could be secreted by neurons, or transmitted from one neuronal cell to another via different modes of unconventional secretion, as well as via tunneling nanotubes (TNTs). These modes of transmission allow the intercellular spread of mHTT and its aggregates, thus plausibly promoting neuropathology within proximal neuronal populations and between neurons that are connected within neural circuits. Here, the various possible modes for mHTT’s neuronal cell exit and intercellular transmission are discussed.
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Affiliation(s)
- Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, 117597 Singapore, Singapore.
- NUS Graduate School for Integrative Sciences and Engineering, 117456 Singapore, Singapore.
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24
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Luna E, Decker SC, Riddle DM, Caputo A, Zhang B, Cole T, Caswell C, Xie SX, Lee VMY, Luk KC. Differential α-synuclein expression contributes to selective vulnerability of hippocampal neuron subpopulations to fibril-induced toxicity. Acta Neuropathol 2018; 135:855-875. [PMID: 29502200 DOI: 10.1007/s00401-018-1829-8] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 12/21/2022]
Abstract
The accumulation of misfolded α-synuclein (aSyn) and neuron loss define several neurodegenerative disorders including Parkinson's disease (PD) and dementia with Lewy bodies (DLB). However, the precise relationship between pathology and neurotoxicity and why these processes disproportionately affect certain neuron subpopulations are poorly understood. We show here that Math2-expressing neurons in the hippocampal Cornu ammonis (CA), a region significantly affected by aSyn pathology in advanced PD and DLB, are highly susceptible to pathological seeding with pre-formed fibrils (PFFs), in contrast to dentate gyrus neurons, which are relatively spared. Math2+ neurons also exhibited more rapid and severe cell loss in both in vitro and in vivo models of synucleinopathy. Toxicity resulting from PFF exposure was dependent on endogenous aSyn and could be attenuated by N-acetyl-cysteine through a glutathione-dependent process. Moreover, aSyn expression levels strongly correlate with relative vulnerability among hippocampal neuron subtypes of which Math2+ neurons contained the highest amount. Consistent with this, antisense oligonucleotide (ASO)-mediated knockdown of aSyn reduced the neuronal pathology in a time-dependent manner. However, significant neuroprotection was observed only with early ASO intervention and a substantial reduction of aSyn pathology, indicating toxicity occurs after a critical threshold of pathological burden is exceeded in vulnerable neurons. Together, our findings reveal considerable heterogeneity in endogenous aSyn levels among hippocampal neurons and suggest that this may contribute to the selective vulnerability observed in the context of synucleinopathies.
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Affiliation(s)
- Esteban Luna
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Samantha C Decker
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Dawn M Riddle
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Anna Caputo
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Bin Zhang
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Tracy Cole
- Ionis Pharmaceuticals, Carlsbad, CA, USA
| | - Carrie Caswell
- Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104-4283, USA
| | - Sharon X Xie
- Department of Biostatistics and Epidemiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, 19104-4283, USA
| | - Virginia M Y Lee
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA
| | - Kelvin C Luk
- Department of Pathology and Laboratory Medicine, Center for Neurodegenerative Disease Research, Philadelphia, PA, 19104-4283, USA.
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Rapid Nuclear Exclusion of Hcm1 in Aging Saccharomyces cerevisiae Leads to Vacuolar Alkalization and Replicative Senescence. G3-GENES GENOMES GENETICS 2018. [PMID: 29519938 PMCID: PMC5940150 DOI: 10.1534/g3.118.200161] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The yeast, Saccharomyces cerevisiae, like other higher eukaryotes, undergo a finite number of cell divisions before exiting the cell cycle due to the effects of aging. Here, we show that yeast aging begins with the nuclear exclusion of Hcm1 in young cells, resulting in loss of acidic vacuoles. Autophagy is required for healthy aging in yeast, with proteins targeted for turnover by autophagy directed to the vacuole. Consistent with this, vacuolar acidity is necessary for vacuolar function and yeast longevity. Using yeast genetics and immunofluorescence microscopy, we confirm that vacuolar acidity plays a critical role in cell health and lifespan, and is potentially maintained by a series of Forkhead Box (Fox) transcription factors. An interconnected transcriptional network involving the Fox proteins (Fkh1, Fkh2 and Hcm1) are required for transcription of v-ATPase subunits and vacuolar acidity. As cells age, Hcm1 is rapidly excluded from the nucleus in young cells, blocking the expression of Hcm1 targets (Fkh1 and Fkh2), leading to loss of v-ATPase gene expression, reduced vacuolar acidification, increased α-syn-GFP vacuolar accumulation, and finally, diminished replicative lifespan (RLS). Loss of vacuolar acidity occurs about the same time as Hcm1 nuclear exclusion and is conserved; we have recently demonstrated that lysosomal alkalization similarly contributes to aging in C. elegans following a transition from progeny producing to post-reproductive life. Our data points to a molecular mechanism regulating vacuolar acidity that signals the end of RLS when acidification is lost.
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Nouraei N, Mason DM, Miner KM, Carcella MA, Bhatia TN, Dumm BK, Soni D, Johnson DA, Luk KC, Leak RK. Critical appraisal of pathology transmission in the α-synuclein fibril model of Lewy body disorders. Exp Neurol 2018; 299:172-196. [PMID: 29056362 PMCID: PMC5736319 DOI: 10.1016/j.expneurol.2017.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 10/17/2017] [Indexed: 12/31/2022]
Abstract
Lewy body disorders are characterized by the emergence of α-synucleinopathy in many parts of the central and peripheral nervous systems, including in the telencephalon. Dense α-synuclein+ pathology appears in regio inferior of the hippocampus in both Parkinson's disease and dementia with Lewy bodies and may disturb cognitive function. The preformed α-synuclein fibril model of Parkinson's disease is growing in use, given its potential for seeding the self-propagating spread of α-synucleinopathy throughout the mammalian brain. Although it is often assumed that the spread occurs through neuroanatomical connections, this is generally not examined vis-à-vis the uptake and transport of tract-tracers infused at precisely the same stereotaxic coordinates. As the neuronal connections of the hippocampus are historically well defined, we examined the first-order spread of α-synucleinopathy three months following fibril infusions centered in the mouse regio inferior (CA2+CA3), and contrasted this to retrograde and anterograde transport of the established tract-tracers FluoroGold and biotinylated dextran amines (BDA). Massive hippocampal α-synucleinopathy was insufficient to elicit memory deficits or loss of cells and synaptic markers in this model of early disease processes. However, dense α-synuclein+ inclusions in the fascia dentata were negatively correlated with memory capacity. A modest compensatory increase in synaptophysin was evident in the stratum radiatum of cornu Ammonis in fibril-infused animals, and synaptophysin expression correlated inversely with memory function in fibril but not PBS-infused mice. No changes in synapsin I/II expression were observed. The spread of α-synucleinopathy was somewhat, but not entirely consistent with FluoroGold and BDA axonal transport, suggesting that variables other than innervation density also contribute to the materialization of α-synucleinopathy. For example, layer II entorhinal neurons of the perforant pathway exhibited somal α-synuclein+ inclusions as well as retrogradely labeled FluoroGold+ somata. However, some afferent brain regions displayed dense retrograde FluoroGold label and no α-synuclein+ inclusions (e.g. medial septum/diagonal band), supporting the selective vulnerability hypothesis. The pattern of inclusions on the contralateral side was consistent with specific spread through commissural connections (e.g. stratum pyramidale of CA3), but again, not all commissural projections exhibited α-synucleinopathy (e.g. hilar mossy cells). The topographical extent of inclusions is displayed here in high-resolution images that afford viewers a rich opportunity to dissect the potential spread of pathology through neural circuitry. Finally, the results of this expository study were leveraged to highlight the challenges and limitations of working with preformed α-synuclein fibrils.
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Affiliation(s)
- Negin Nouraei
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Daniel M Mason
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Kristin M Miner
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Michael A Carcella
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Tarun N Bhatia
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Benjamin K Dumm
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Dishaben Soni
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - David A Johnson
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States
| | - Kelvin C Luk
- Department of Pathology, University of Pennsylvania, Philadelphia, PA 19147, United States
| | - Rehana K Leak
- Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, PA 15282, United States.
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27
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α-synuclein interacts with PrP C to induce cognitive impairment through mGluR5 and NMDAR2B. Nat Neurosci 2017; 20:1569-1579. [PMID: 28945221 DOI: 10.1038/nn.4648] [Citation(s) in RCA: 193] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 08/21/2017] [Indexed: 12/20/2022]
Abstract
Synucleinopathies, such as Parkinson's disease and dementia with Lewy bodies, are neurodegenerative disorders that are characterized by the accumulation of α-synuclein (aSyn) in intracellular inclusions known as Lewy bodies. Prefibrillar soluble aSyn oligomers, rather than larger inclusions, are currently considered to be crucial species underlying synaptic dysfunction. We identified the cellular prion protein (PrPC) as a key mediator in aSyn-induced synaptic impairment. The aSyn-associated impairment of long-term potentiation was blocked in Prnp null mice and rescued following PrPC blockade. We found that extracellular aSyn oligomers formed a complex with PrPC that induced the phosphorylation of Fyn kinase via metabotropic glutamate receptors 5 (mGluR5). aSyn engagement of PrPC and Fyn activated NMDA receptor (NMDAR) and altered calcium homeostasis. Blockade of mGluR5-evoked phosphorylation of NMDAR in aSyn transgenic mice rescued synaptic and cognitive deficits, supporting the hypothesis that a receptor-mediated mechanism, independent of pore formation and membrane leakage, is sufficient to trigger early synaptic damage induced by extracellular aSyn.
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