1
|
Shin C, Kim SI, Park SH, Kim JM, Lee JY, Chung SJ, Kim JW, Ahn TB, Park KW, Shin JH, Lee CY, Lee HJ, Kong SH, Suh YS, Kim HJ, Yang HK, Jeon B. Diagnostic accuracy and predictors of alpha-synuclein accumulation in the gastrointestinal tract of Parkinson's disease. NPJ Parkinsons Dis 2024; 10:155. [PMID: 39147801 PMCID: PMC11327357 DOI: 10.1038/s41531-024-00766-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 07/29/2024] [Indexed: 08/17/2024] Open
Abstract
The only characteristic of alpha-synuclein (AS) accumulation in the gastrointestinal (GI) tract of Parkinson's disease (PD) found in pathological studies is the "rostrocaudal gradient," which describes the more frequent presence of AS accumulation in the upper GI tract than in the lower GI tract. This study aimed to determine the diagnostic accuracy and identify predictors of AS accumulation in the GI tract of PD patients. The frequency of AS accumulation in the GI tract was compared between PD patients (N = 97) who underwent radical GI surgery for cancer and individually matched controls (N = 94). We evaluated AS accumulation in the neural structures using phosphorylated AS immunohistochemistry. A multivariable logistic regression analysis was conducted to determine the predictors of AS accumulation in the GI tract of PD patients. The frequency of AS accumulation was significantly higher in PD patients (75.3%) than in controls (8.5%, p-value < 0.001). The sensitivity and specificity of the full-layer evaluation were 75.3% and 91.5%, respectively. When the evaluation was confined to the mucosal/submucosal layer, the sensitivity and specificity were 46.9% and 94.7%, respectively. The rostrocaudal gradient of AS accumulation was found in PD patients. The duration from symptom onset to surgery was significantly longer in PD patients with AS accumulation (4.9 ± 4.9 years) than in PD patients without AS accumulation (1.8 ± 4.1 years, p-value = 0.005). Both disease duration and rostrocaudal gradient independently predicted the presence of AS accumulation in the GI tract of PD patients. Our study suggests PD-related AS accumulation in the GI tract follows a temporally increasing but spatially static progression pattern.
Collapse
Affiliation(s)
- Chaewon Shin
- Department of Neurology, Chungnam National University Sejong Hospital, Chungnam National University College of Medicine, 20, Bodeum 7-ro, Sejong-si, Republic of Korea
| | - Seong-Ik Kim
- Department of Pathology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Sung-Hye Park
- Department of Pathology, College of Medicine, Seoul National University, 103 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Jong-Min Kim
- Department of Neurology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 173 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Jee-Young Lee
- Department of Neurology, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, 20 Boramae-ro 5-gil, Dongjak-gu, 07061, Seoul, Republic of Korea
| | - Sun Ju Chung
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, Republic of Korea
| | - Jae Woo Kim
- Department of Neurology, Dong-A University Hospital, 26 Daesingongwon-ro, Seo-gu, Busan, Republic of Korea
| | - Tae-Beom Ahn
- Department of Neurology, Kyung Hee University Hospital, Kyung Hee University College of Medicine, 23 Kyungheedae-ro, Dongdaemun-gu, Seoul, Republic of Korea
| | - Kye Won Park
- Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, Republic of Korea
- Pacific Parkinson Research Centre, University of British Columbia, Vancouver, BC, Canada
| | - Jung Hwan Shin
- Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Chan Young Lee
- Department of Neurology, Ewha Womans University Mokdong Hospital, 1071 Annyangcheon-ro, Yangcheon-gu, Seoul, Republic of Korea
| | - Hyuk-Joon Lee
- Department of Surgery, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Seong-Ho Kong
- Department of Surgery, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Yun-Suhk Suh
- Department of Surgery, Seoul National University Bundang Hospital, 82 Gumi-ro 173 Beon-gil, Bundang-gu, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Han-Joon Kim
- Department of Neurology, Seoul National University Hospital, Seoul National University College of Medicine, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Han-Kwang Yang
- Department of Surgery, Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, Republic of Korea
| | - Beomseok Jeon
- Department of Neurology, Chung-ang University Health Care System Hyundae Hospital, Namyangju-si, Gyeonggi-do, Republic of Korea.
| |
Collapse
|
2
|
Leak RK, Clark RN, Abbas M, Xu F, Brodsky JL, Chen J, Hu X, Luk KC. Current insights and assumptions on α-synuclein in Lewy body disease. Acta Neuropathol 2024; 148:18. [PMID: 39141121 PMCID: PMC11324801 DOI: 10.1007/s00401-024-02781-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 07/28/2024] [Accepted: 08/04/2024] [Indexed: 08/15/2024]
Abstract
Lewy body disorders are heterogeneous neurological conditions defined by intracellular inclusions composed of misshapen α-synuclein protein aggregates. Although α-synuclein aggregates are only one component of inclusions and not strictly coupled to neurodegeneration, evidence suggests they seed the propagation of Lewy pathology within and across cells. Genetic mutations, genomic multiplications, and sequence polymorphisms of the gene encoding α-synuclein are also causally linked to Lewy body disease. In nonfamilial cases of Lewy body disease, the disease trigger remains unidentified but may range from industrial/agricultural toxicants and natural sources of poisons to microbial pathogens. Perhaps due to these peripheral exposures, Lewy inclusions appear at early disease stages in brain regions connected with cranial nerves I and X, which interface with inhaled and ingested environmental elements in the nasal or gastrointestinal cavities. Irrespective of its identity, a stealthy disease trigger most likely shifts soluble α-synuclein (directly or indirectly) into insoluble, cross-β-sheet aggregates. Indeed, β-sheet-rich self-replicating α-synuclein multimers reside in patient plasma, cerebrospinal fluid, and other tissues, and can be subjected to α-synuclein seed amplification assays. Thus, clinicians should be able to capitalize on α-synuclein seed amplification assays to stratify patients into potential responders versus non-responders in future clinical trials of α-synuclein targeted therapies. Here, we briefly review the current understanding of α-synuclein in Lewy body disease and speculate on pathophysiological processes underlying the potential transmission of α-synucleinopathy across the neuraxis.
Collapse
Affiliation(s)
- Rehana K Leak
- Graduate School of Pharmaceutical Sciences, Duquesne University, 418C Mellon Hall, 913 Bluff Street, Pittsburgh, PA, 15219, USA.
| | - Rachel N Clark
- Graduate School of Pharmaceutical Sciences, Duquesne University, 418C Mellon Hall, 913 Bluff Street, Pittsburgh, PA, 15219, USA
| | - Muslim Abbas
- Graduate School of Pharmaceutical Sciences, Duquesne University, 418C Mellon Hall, 913 Bluff Street, Pittsburgh, PA, 15219, USA
| | - Fei Xu
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jeffrey L Brodsky
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jun Chen
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, Pennsylvania, USA
| | - Xiaoming Hu
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Kelvin C Luk
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Pennsylvania, PA, USA
| |
Collapse
|
3
|
Maekawa T, Motokawa R, Kawashima R, Tamaki S, Hara Y, Kawakami F, Ichikawa T. Biphenotypic Cells and α-Synuclein Accumulation in Enteric Neurons of Leucine-Rich Repeat Kinase 2 Knockout Mice. Dig Dis Sci 2024; 69:2828-2840. [PMID: 38849592 DOI: 10.1007/s10620-024-08494-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 05/09/2024] [Indexed: 06/09/2024]
Abstract
BACKGROUND Leucine-rich repeat kinase 2 is a molecule that is responsible for familial Parkinson's disease. Our previous findings revealed that leucine-rich repeat kinase 2 is expressed in the enteric nervous system. However, which cells in the enteric nervous system express leucine-rich repeat kinase 2 and whether leucine-rich repeat kinase 2 is associated with the structure of the enteric nervous system remain unclear. The enteric nervous system is remarkable because some patients with Parkinson's disease experience gastrointestinal symptoms before developing motor symptoms. AIMS We established a leucine-rich repeat kinase 2 reporter mouse model and performed immunostaining in leucine-rich repeat kinase 2 knockout mice. METHODS Longitudinal muscle containing the myenteric plexus prepared from leucine-rich repeat kinase 2 reporter mice was analyzed by immunostaining using anti-green fluorescent protein (GFP) antibody. Immunostaining using several combinations of antibodies characterizing enteric neurons and glial cells was performed on intestinal preparations from leucine-rich repeat kinase 2 knockout mice. RESULTS GFP expression in the reporter mice was predominantly in enteric glial cells rather than in enteric neurons. Immunostaining revealed that differences in the structure and proportion of major immunophenotypic cells were not apparent in the knockout mice. Interestingly, the number of biphenotypic cells expressing the neuronal and glial cell markers increased in the leucine-rich repeat kinase 2 knockout mice. Moreover, there was accumulation of α-synuclein in the knockout mice. CONCLUSIONS Our present findings suggest that leucine-rich repeat kinase 2 is a newly recognized molecule that potentially regulates the integrity of enteric nervous system and enteric α-synuclein accumulation.
Collapse
Affiliation(s)
- Tatsunori Maekawa
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan.
- Department of Biochemistry, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan.
- Research Facility of Regenerative Medicine and Cell Design, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan.
| | - Ryuichi Motokawa
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Rei Kawashima
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
- Department of Biochemistry, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
- Research Facility of Regenerative Medicine and Cell Design, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Shun Tamaki
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
- Department of Biochemistry, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
- Research Facility of Regenerative Medicine and Cell Design, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Yusuke Hara
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Fumitaka Kawakami
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
- Department of Health Administration, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
- Research Facility of Regenerative Medicine and Cell Design, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
| | - Takafumi Ichikawa
- Department of Regulation Biochemistry, Graduate School of Medical Sciences, Kitasato University, 1-15-1 Kitasato, Minami-Ku, Sagamihara, Kanagawa, 252-0373, Japan
- Department of Biochemistry, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
- Research Facility of Regenerative Medicine and Cell Design, School of Allied Health Sciences, Kitasato University, Sagamihara, Kanagawa, Japan
| |
Collapse
|
4
|
Homolak J, Joja M, Grabaric G, Schiatti E, Virag D, Babic Perhoc A, Knezovic A, Osmanovic Barilar J, Salkovic-Petrisic M. The Absence of Gastrointestinal Redox Dyshomeostasis in the Brain-First Rat Model of Parkinson's Disease Induced by Bilateral Intrastriatal 6-Hydroxydopamine. Mol Neurobiol 2024; 61:5481-5493. [PMID: 38200352 PMCID: PMC11249596 DOI: 10.1007/s12035-023-03906-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
The gut-brain axis plays an important role in Parkinson's disease (PD) by acting as a route for vagal propagation of aggregated α-synuclein in the gut-first endophenotype and as a mediator of gastrointestinal dyshomeostasis via the nigro-vagal pathway in the brain-first endophenotype of the disease. One important mechanism by which the gut-brain axis may promote PD is by regulating gastrointestinal redox homeostasis as overwhelming evidence suggests that oxidative stress plays a key role in the etiopathogenesis and progression of PD and the gastrointestinal tract maintains redox homeostasis of the organism by acting as a critical barrier to environmental and microbiological electrophilic challenges. The present aim was to utilize the bilateral intrastriatal 6-hydroxydopamine (6-OHDA) brain-first PD model to study the effects of isolated central pathology on redox homeostasis of the gastrointestinal tract. Three-month-old male Wistar rats were either not treated (intact controls; CTR) or treated bilaterally intrastriatally with vehicle (CIS) or 6-OHDA (6-OHDA). Motor deficits were assessed with the rotarod performance test, and the duodenum, ileum, and colon were dissected for biochemical analyses 12 weeks after the treatment. Lipid peroxidation, total antioxidant capacity, low-molecular-weight thiols, and protein sulfhydryls, the activity of total and Mn/Fe superoxide dismutases, and total and azide-insensitive catalase/peroxidase were measured. Both univariate and multivariate models analyzing redox biomarkers indicate that significant disturbances in gastrointestinal redox balance are not present. The findings demonstrate that motor impairment observed in the brain-first 6-OHDA model of PD can occur without concurrent redox imbalances in the gastrointestinal system.
Collapse
Affiliation(s)
- Jan Homolak
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia.
- Interfaculty Institute of Microbiology and Infection Medicine & Cluster of Excellence "Controlling Microbes to Fight Infections,", University of Tübingen, Tübingen, Germany.
| | - Mihovil Joja
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
- Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg
- Faculty of Science, Technology and Medicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Gracia Grabaric
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| | - Emiliano Schiatti
- Faculty of Medicine and Surgery, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Davor Virag
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| | - Ana Babic Perhoc
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| | - Ana Knezovic
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| | - Jelena Osmanovic Barilar
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| | - Melita Salkovic-Petrisic
- Department of Pharmacology & Croatian Institute for Brain Research, University of Zagreb School of Medicine, Salata 11, 10 000, Zagreb, Croatia
| |
Collapse
|
5
|
Ghosh N, Sinha K, Sil PC. Pesticides and the Gut Microbiota: Implications for Parkinson's Disease. Chem Res Toxicol 2024; 37:1071-1085. [PMID: 38958636 DOI: 10.1021/acs.chemrestox.4c00057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024]
Abstract
Parkinson's disease (PD) affects more people worldwide than just aging alone can explain. This is likely due to environmental influences, genetic makeup, and changes in daily habits. The disease develops in a complex way, with movement problems caused by Lewy bodies and the loss of dopamine-producing neurons. Some research suggests Lewy bodies might start in the gut, hinting at a connection between these structures and gut health in PD patients. These patients often have different gut bacteria and metabolites. Pesticides are known to increase the risk of PD, with evidence showing they harm more than just dopamine neurons. Long-term exposure to pesticides in food might affect the gut barrier, gut bacteria, and the blood-brain barrier, but the exact link is still unknown. This review looks at how pesticides and gut bacteria separately influence PD development and progression, highlighting the harmful effects of pesticides and changes in gut bacteria. We have examined the interaction between pesticides and gut bacteria in PD patients, summarizing how pesticides cause imbalances in gut bacteria, the resulting changes, and their overall effects on the PD prognosis.
Collapse
Affiliation(s)
- Nabanita Ghosh
- Assistant Professor in Zoology, Maulana Azad College, Kolkata 700013, India
| | - Krishnendu Sinha
- Assistant Professor in Zoology, Jhargram Raj College, Jhargram 721507 India
| | - Parames C Sil
- Professor, Division of Molecular Medicine, Bose Institute, Kolkata 700054 India
| |
Collapse
|
6
|
Bhardwaj K, Singh AA, Kumar H. Unveiling the Journey from the Gut to the Brain: Decoding Neurodegeneration-Gut Connection in Parkinson's Disease. ACS Chem Neurosci 2024; 15:2454-2469. [PMID: 38896463 DOI: 10.1021/acschemneuro.4c00293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2024] Open
Abstract
Parkinson's disease, a classical motor disorder affecting the dopaminergic system of the brain, has been as a disease of the brain, but this classical notion has now been viewed differently as the pathology begins in the gut and then gradually moves up to the brain regions. The microorganisms in the gut play a critical role in maintaining the physiology of the gut from maintaining barrier integrity to secretion of microbial products that maintain a healthy gut state. The pathology subsequently alters the normal composition of gut microbes and causes deleterious effects that ultimately trigger strong neuroinflammation and nonmotor symptoms along with characteristic synucleopathy, a pathological hallmark of the disease. Understanding the complex pathomechanisms in distinct and established preclinical models is the primary goal of researchers to decipher how exactly gut pathology has a central effect; the quest has led to many answered and some open-ended questions for researchers. We summarize the popular opinions and some contrasting views, concise footsteps in the treatment strategies targeting the gastrointestinal system.
Collapse
Affiliation(s)
- Kritika Bhardwaj
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Opposite Air force station, Palaj, Gandhinagar, 382355 Gujarat, India
| | - Aditya A Singh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Opposite Air force station, Palaj, Gandhinagar, 382355 Gujarat, India
| | - Hemant Kumar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Ahmedabad (NIPER-A), Opposite Air force station, Palaj, Gandhinagar, 382355 Gujarat, India
| |
Collapse
|
7
|
Woerman AL, Bartz JC. Effect of host and strain factors on α-synuclein prion pathogenesis. Trends Neurosci 2024; 47:538-550. [PMID: 38806297 PMCID: PMC11236502 DOI: 10.1016/j.tins.2024.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/19/2024] [Accepted: 05/04/2024] [Indexed: 05/30/2024]
Abstract
Prion diseases are a group of neurodegenerative disorders caused by misfolding of proteins into pathogenic conformations that self-template to spread disease. Although this mechanism is largely associated with the prion protein (PrP) in classical prion diseases, a growing literature indicates that other proteins, including α-synuclein, rely on a similar disease mechanism. Notably, α-synuclein misfolds into distinct conformations, or strains, that cause discrete clinical disorders including multiple system atrophy (MSA) and Parkinson's disease (PD). Because the recognized similarities between PrP and α-synuclein are increasing, this review article draws from research on PrP to identify the host and strain factors that impact disease pathogenesis, predominantly in rodent models, and focuses on key considerations for future research on α-synuclein prions.
Collapse
Affiliation(s)
- Amanda L Woerman
- Department of Microbiology, Immunology, and Pathology, Prion Research Center, Colorado State University, Fort Collins, CO, USA.
| | - Jason C Bartz
- Department of Microbiology, Immunology, and Pathology, Prion Research Center, Colorado State University, Fort Collins, CO, USA; Department of Medical Microbiology and Immunology, School of Medicine, Creighton University, Omaha, NE, USA.
| |
Collapse
|
8
|
Riegelman E, Xue KS, Wang JS, Tang L. Gut-Brain Axis in Focus: Polyphenols, Microbiota, and Their Influence on α-Synuclein in Parkinson's Disease. Nutrients 2024; 16:2041. [PMID: 38999791 PMCID: PMC11243524 DOI: 10.3390/nu16132041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 06/20/2024] [Accepted: 06/25/2024] [Indexed: 07/14/2024] Open
Abstract
With the recognition of the importance of the gut-brain axis in Parkinson's disease (PD) etiology, there is increased interest in developing therapeutic strategies that target α-synuclein, the hallmark abhorrent protein of PD pathogenesis, which may originate in the gut. Research has demonstrated that inhibiting the aggregation, oligomerization, and fibrillation of α-synuclein are key strategies for disease modification. Polyphenols, which are rich in fruits and vegetables, are drawing attention for their potential role in this context. In this paper, we reviewed how polyphenols influence the composition and functional capabilities of the gut microbiota and how the resulting microbial metabolites of polyphenols may potentially enhance the modulation of α-synuclein aggregation. Understanding the interaction between polyphenols and gut microbiota and identifying which specific microbes may enhance the efficacy of polyphenols is crucial for developing therapeutic strategies and precision nutrition based on the microbiome.
Collapse
Affiliation(s)
| | | | | | - Lili Tang
- Department of Environmental Health Science, University of Georgia, Athens, GA 30602, USA; (E.R.); (K.S.X.); (J.-S.W.)
| |
Collapse
|
9
|
Morais LH, Boktor JC, MahmoudianDehkordi S, Kaddurah-Daouk R, Mazmanian SK. α-Synuclein Overexpression and the Microbiome Shape the Gut and Brain Metabolome in Mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.06.07.597975. [PMID: 38915679 PMCID: PMC11195096 DOI: 10.1101/2024.06.07.597975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Pathological forms of the protein α-synuclein contribute to a family of disorders termed synucleinopathies, which includes Parkinson's disease (PD). Most cases of PD are believed to arise from gene-environment interactions. Microbiome composition is altered in PD, and gut bacteria are causal to symptoms and pathology in animal models. To explore how the microbiome may impact PD-associated genetic risks, we quantitatively profiled nearly 630 metabolites from 26 biochemical classes in the gut, plasma, and brain of α-synuclein-overexpressing (ASO) mice with or without microbiota. We observe tissue-specific changes driven by genotype, microbiome, and their interaction. Many differentially expressed metabolites in ASO mice are also dysregulated in human PD patients, including amine oxides, bile acids and indoles. Notably, levels of the microbial metabolite trimethylamine N-oxide (TMAO) strongly correlate from the gut to the plasma to the brain, identifying a product of gene-environment interactions that may influence PD-like outcomes in mice. TMAO is elevated in the blood and cerebral spinal fluid of PD patients. These findings uncover broad metabolomic changes that are influenced by the intersection of host genetics and the microbiome in a mouse model of PD.
Collapse
Affiliation(s)
- Livia H. Morais
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815
| | - Joseph C. Boktor
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815
| | | | - Rima Kaddurah-Daouk
- Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA
- Duke Institute of Brain Sciences, Duke University, Durham, NC, USA
- Department of Medicine, Duke University, Durham, NC, USA
| | - Sarkis K. Mazmanian
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815
| |
Collapse
|
10
|
Fabi JP. The connection between gut microbiota and its metabolites with neurodegenerative diseases in humans. Metab Brain Dis 2024; 39:967-984. [PMID: 38848023 DOI: 10.1007/s11011-024-01369-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Accepted: 06/03/2024] [Indexed: 07/10/2024]
Abstract
The aging of populations is a global phenomenon that follows a possible increase in the incidence of neurodegenerative diseases. Alzheimer's, Parkinson's, Multiple Sclerosis, Amyotrophic Lateral Sclerosis, and Huntington's diseases are some neurodegenerative disorders that aging could initiate or aggravate. Recent research has indicated that intestinal microbiota dysbiosis can trigger metabolism and brain functioning, contributing to the etiopathogenesis of those neurodegenerative diseases. The intestinal microbiota and its metabolites show significant functions in various aspects, such as the immune system modulation (development and maturation), the maintenance of the intestinal barrier integrity, the modulation of neuromuscular functions in the intestine, and the facilitation of essential metabolic processes for both the microbiota and humans. The primary evidence supporting the connection between intestinal microbiota and its metabolites with neurodegenerative diseases are epidemiological observations and animal models experimentation. This paper reviews up-to-date evidence on the correlation between the microbiota-gut-brain axis and neurodegenerative diseases, with a specially focus on gut metabolites. Dysbiosis can increase inflammatory cytokines and bacterial metabolites, altering intestinal and blood-brain barrier permeability and causing neuroinflammation, thus facilitating the pathogenesis of neurodegenerative diseases. Clinical data supporting this evidence still needs to be improved. Most of the works found are descriptive and associated with the presence of phyla or species of bacteria with neurodegenerative diseases. Despite the limitations of recent research, the potential for elucidating clinical questions that have thus far eluded clarification within prevailing pathophysiological frameworks of health and disease is promising through investigation of the interplay between the host and microbiota.
Collapse
Affiliation(s)
- João Paulo Fabi
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, 05508000, SP, Brazil.
- Food and Nutrition Research Center (NAPAN), University of São Paulo, São Paulo, 05508080, SP, Brazil.
- Food Research Center (FoRC), CEPID-FAPESP (Research, Innovation and Dissemination Centers, São Paulo Research Foundation), São Paulo, 05508080, SP, Brazil.
| |
Collapse
|
11
|
Li Y, Ren H, Chi C, Miao Y. Artificial Intelligence-Guided Gut-Microenvironment-Triggered Imaging Sensor Reveals Potential Indicators of Parkinson's Disease. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307819. [PMID: 38569219 PMCID: PMC11187919 DOI: 10.1002/advs.202307819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/16/2024] [Indexed: 04/05/2024]
Abstract
The gut-brain axis has recently emerged as a crucial link in the development and progression of Parkinson's disease (PD). Dysregulation of the gut microbiota has been implicated in the pathogenesis of this disease, sparking growing interest in the quest for non-invasive biomarkers derived from the gut for early PD diagnosis. Herein, an artificial intelligence-guided gut-microenvironment-triggered imaging sensor (Eu-MOF@Au-Aptmer) to achieve non-invasive, accurate screening for various stages of PD is presented. The sensor works by analyzing α-Syn in the gut using deep learning algorithms. By monitoring changes in α-Syn, the sensor can predict the onset of PD with high accuracy. This work has the potential to revolutionize the diagnosis and treatment of PD by allowing for early intervention and personalized treatment plans. Moreover, it exemplifies the promising prospects of integrating artificial intelligence (AI) and advanced sensors in the monitoring and prediction of a broad spectrum of diseases and health conditions.
Collapse
Affiliation(s)
- Yiwei Li
- Department of Haematology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's HospitalSchool of Medicine of University of Electronic Science and Technology of ChinaNo. 32, West Section 2, First Ring Road, Qingyang DistrictChengdu610000China
- Institute of Communications Engineering & Department of Electrical EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Hong‐Xia Ren
- Sichuan Technology & Business CollegeChengdu611800China
| | - Chong‐Yung Chi
- Institute of Communications Engineering & Department of Electrical EngineeringNational Tsing Hua UniversityHsinchu30013Taiwan
| | - Yang‐Bao Miao
- Department of Haematology, Sichuan Academy of Medical Sciences & Sichuan Provincial People's HospitalSchool of Medicine of University of Electronic Science and Technology of ChinaNo. 32, West Section 2, First Ring Road, Qingyang DistrictChengdu610000China
| |
Collapse
|
12
|
Elkins M, Jain N, Tükel Ç. The menace within: bacterial amyloids as a trigger for autoimmune and neurodegenerative diseases. Curr Opin Microbiol 2024; 79:102473. [PMID: 38608623 PMCID: PMC11162901 DOI: 10.1016/j.mib.2024.102473] [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: 01/15/2024] [Revised: 03/20/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024]
Abstract
Bacteria are known to produce amyloids, proteins characterized by a conserved cross-beta sheet structure, which exhibit structural and functional similarities to human amyloids. The deposition of human amyloids into fibrillar plaques within organs is closely linked to several debilitating human diseases, including Alzheimer's and Parkinson's disease. Recently, bacterial amyloids have garnered significant attention as potential initiators of human amyloid-associated diseases as well as autoimmune diseases. This review aims to explore how bacterial amyloid, particularly curli found in gut biofilms, can act as a trigger for neurodegenerative and autoimmune diseases. We will elucidate three primary mechanisms through which bacterial amyloids exert their influence: By delving into these three distinct modes of action, this review will provide valuable insights into the intricate relationship between bacterial amyloids and the onset or progression of neurodegenerative and autoimmune diseases. A comprehensive understanding of these mechanisms may open new avenues for therapeutic interventions and preventive strategies targeting amyloid-associated diseases.
Collapse
Affiliation(s)
- Molly Elkins
- Center for Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA
| | - Neha Jain
- Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur, NH 62, Surpura Bypass, Karwar, Rajasthan, India
| | - Çagla Tükel
- Center for Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, USA.
| |
Collapse
|
13
|
Mao X, Gu H, Kim D, Kimura Y, Wang N, Xu E, Kumbhar R, Ming X, Wang H, Chen C, Zhang S, Jia C, Liu Y, Bian H, Karuppagounder SS, Akkentli F, Chen Q, Jia L, Hwang H, Lee SH, Ke X, Chang M, Li A, Yang J, Rastegar C, Sriparna M, Ge P, Brahmachari S, Kim S, Zhang S, Shimoda Y, Saar M, Liu H, Kweon SH, Ying M, Workman CJ, Vignali DAA, Muller UC, Liu C, Ko HS, Dawson VL, Dawson TM. Aplp1 interacts with Lag3 to facilitate transmission of pathologic α-synuclein. Nat Commun 2024; 15:4663. [PMID: 38821932 PMCID: PMC11143359 DOI: 10.1038/s41467-024-49016-3] [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: 10/04/2023] [Accepted: 05/22/2024] [Indexed: 06/02/2024] Open
Abstract
Pathologic α-synuclein (α-syn) spreads from cell-to-cell, in part, through binding to the lymphocyte-activation gene 3 (Lag3). Here we report that amyloid β precursor-like protein 1 (Aplp1) interacts with Lag3 that facilitates the binding, internalization, transmission, and toxicity of pathologic α-syn. Deletion of both Aplp1 and Lag3 eliminates the loss of dopaminergic neurons and the accompanying behavioral deficits induced by α-syn preformed fibrils (PFF). Anti-Lag3 prevents the internalization of α-syn PFF by disrupting the interaction of Aplp1 and Lag3, and blocks the neurodegeneration induced by α-syn PFF in vivo. The identification of Aplp1 and the interplay with Lag3 for α-syn PFF induced pathology deepens our insight about molecular mechanisms of cell-to-cell transmission of pathologic α-syn and provides additional targets for therapeutic strategies aimed at preventing neurodegeneration in Parkinson's disease and related α-synucleinopathies.
Collapse
Affiliation(s)
- Xiaobo Mao
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA.
| | - Hao Gu
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Nanjing Brain Hospital, Nanjing, Jiangsu, 210029, PR China
- Medical College, Yangzhou University, Yangzhou, Jiangsu, 225001, PR China
| | - Donghoon Kim
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Pharmacology, College of Medicine, Dong-A University, 32 Daesin Gongwwon-ro, Seo-gu, Busan, 49201, Republic of Korea
| | - Yasuyoshi Kimura
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Ning Wang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Enquan Xu
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Ramhari Kumbhar
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA
| | - Xiaotian Ming
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Haibo Wang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Chan Chen
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Anesthesiology, West China Hospital, Sichuan University. The Research Units of West China (2018RU012)-Chinese Academy of Medical Sciences, West China Hospital, Sichuan University, Chengdu, Sichuan, 610041, PR China
| | - Shengnan Zhang
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai, 201210, China
| | - Chunyu Jia
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai, 201210, China
- University of the Chinese Academy of Sciences, 19 A Yuquan Road, Shijingshan District, Beijing, 100049, China
| | - Yuqing Liu
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Hetao Bian
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Senthilkumar S Karuppagounder
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Fatih Akkentli
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA
| | - Qi Chen
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Longgang Jia
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Heehong Hwang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Su Hyun Lee
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Xiyu Ke
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Materials Science and Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Michael Chang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Amanda Li
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Jun Yang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Cyrus Rastegar
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Manjari Sriparna
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Preston Ge
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Picower Institute for Learning and Memory, Cambridge, MA, 02139, USA
- Harvard-MIT MD/PhD Program, Harvard Medical School, Boston, MA, 02115, USA
| | - Saurav Brahmachari
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Sangjune Kim
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Biological Science and Biotechnology, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Shu Zhang
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Yasushi Shimoda
- Department of Bioengineering, Nagaoka University of Technology, 1603-1 Kamitomiokamachi, Nagaoka, Niigata, 940-2188, Japan
| | - Martina Saar
- Institute for Pharmacy and Molecular Biotechnology IPMB, Department of Functional Genomics, University of Heidelberg, Im Neuenheimer Feld 364, 69120, Heidelberg, Germany
| | - Haiqing Liu
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Physiology, School of Basic Medical Sciences (Institute of Basic Medical Sciences), Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250000, China
| | - Sin Ho Kweon
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
| | - Mingyao Ying
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Hugo W. Moser Research Institute at Kennedy Krieger, 707 North Broadway, Baltimore, MD, 21205, USA
| | - Creg J Workman
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - Dario A A Vignali
- Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
- Tumor Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, 15232, USA
| | - Ulrike C Muller
- Institute for Pharmacy and Molecular Biotechnology IPMB, Department of Functional Genomics, University of Heidelberg, Im Neuenheimer Feld 364, 69120, Heidelberg, Germany
| | - Cong Liu
- Interdisciplinary Research Center on Biology and Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 26 Qiuyue Road, Shanghai, 201210, China
| | - Han Seok Ko
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA.
| | - Valina L Dawson
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA.
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| | - Ted M Dawson
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Adrienne Helis Malvin Medical Research Foundation, New Orleans, LA, 70130-2685, USA.
- Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
| |
Collapse
|
14
|
Valdés-Fuentes M, Rodríguez-Martínez E, Rivas-Arancibia S. Accumulation of Alpha-Synuclein and Increase in the Inflammatory Response in the substantia nigra, Jejunum, and Colon in a Model of O 3 Pollution in Rats. Int J Mol Sci 2024; 25:5526. [PMID: 38791561 PMCID: PMC11122268 DOI: 10.3390/ijms25105526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 05/14/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024] Open
Abstract
This work aimed to study the effect of repeated exposure to low doses of ozone on alpha-synuclein and the inflammatory response in the substantia nigra, jejunum, and colon. Seventy-two male Wistar rats were divided into six groups. Each group received one of the following treatments: The control group was exposed to air. The ozone groups were exposed for 7, 15, 30, 60, and 90 days for 0.25 ppm for four hours daily. Afterward, they were anesthetized, and their tissues were extracted and processed using Western blotting, immunohistochemistry, and qPCR. The results indicated a significant increase in alpha-synuclein in the substantia nigra and jejunum from 7 to 60 days of exposure and an increase in NFκB from 7 to 90 days in the substantia nigra, while in the jejunum, a significant increase was observed at 7 and 15 days and a decrease at 60 and 90 days for the colon. Interleukin IL-17 showed an increase at 90 days in the substantia nigra in the jejunum and increases at 30 days and in the colon at 15 and 90 days. Exposure to ozone increases the presence of alpha-synuclein and induces the loss of regulation of the inflammatory response, which contributes significantly to degenerative processes.
Collapse
Affiliation(s)
| | | | - Selva Rivas-Arancibia
- Departamento de Fisiología, Facultad de Medicina, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico; (M.V.-F.); (E.R.-M.)
| |
Collapse
|
15
|
Aljeradat B, Kumar D, Abdulmuizz S, Kundu M, Almealawy YF, Batarseh DR, Atallah O, Ennabe M, Alsarafandi M, Alan A, Weinand M. Neuromodulation and the Gut-Brain Axis: Therapeutic Mechanisms and Implications for Gastrointestinal and Neurological Disorders. PATHOPHYSIOLOGY 2024; 31:244-268. [PMID: 38804299 PMCID: PMC11130832 DOI: 10.3390/pathophysiology31020019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/13/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024] Open
Abstract
The gut-brain axis (GBA) represents a complex, bidirectional communication network that intricately connects the gastrointestinal tract with the central nervous system (CNS). Understanding and intervening in this axis opens a pathway for therapeutic advancements for neurological and gastrointestinal diseases where the GBA has been proposed to play a role in the pathophysiology. In light of this, the current review assesses the effectiveness of neuromodulation techniques in treating neurological and gastrointestinal disorders by modulating the GBA, involving key elements such as gut microbiota, neurotrophic factors, and proinflammatory cytokines. Through a comprehensive literature review encompassing PubMed, Google Scholar, Web of Science, and the Cochrane Library, this research highlights the role played by the GBA in neurological and gastrointestinal diseases, in addition to the impact of neuromodulation on the management of these conditions which include both gastrointestinal (irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), and gastroesophageal reflux disease (GERD)) and neurological disorders (Parkinson's disease (PD), Alzheimer's disease (AD), autism spectrum disorder (ASD), and neuropsychiatric disorders). Despite existing challenges, the ability of neuromodulation to adjust disrupted neural pathways, alleviate pain, and mitigate inflammation is significant in improving the quality of life for patients, thereby offering exciting prospects for future advancements in patient care.
Collapse
Affiliation(s)
- Baha’ Aljeradat
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- School of Medicine, The University of Jordan, Amman 11942, Jordan
| | - Danisha Kumar
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- Dow Medical College, Dow University of Health Sciences, Karachi 74200, Pakistan
| | - Sulaiman Abdulmuizz
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- College of Health Sciences, University of Ilorin, Ilorin 240003, Kwara, Nigeria
| | - Mrinmoy Kundu
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- Institute of Medical Sciences and SUM Hospital, Bhubaneswar 751029, India
| | - Yasser F. Almealawy
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- Faculty of Medicine, University of Kufa, Kufa P.O. Box 21, Iraq
| | - Dima Ratib Batarseh
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- School of Medicine, The University of Jordan, Amman 11942, Jordan
| | - Oday Atallah
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- Department of Neurosurgery, Hannover Medical School, 30625 Hannover, Germany
| | - Michelle Ennabe
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- College of Medicine, The University of Arizona College of Medicine, Phoenix, AZ 85004, USA
| | - Muath Alsarafandi
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- College of Medicine, Islamic University of Gaza, Rafa Refugee Camp, Rafa P.O. Box 108, Palestine
- Faculty of Medicine, Islamic University of Gaza, Gaza P.O. Box 108, Palestine
| | - Albert Alan
- Global Neurosurgical Alliance, Tucson, AZ 85716, USA; (B.A.); (D.K.); (S.A.); (M.K.); (Y.F.A.); (D.R.B.); (O.A.); (M.E.); (M.A.)
- Department of Neurosurgery, University of Arizona, Tucson, AZ 85724, USA;
- College of Medicine, The University of Arizona College of Medicine, Tucson, AZ 85004, USA
| | - Martin Weinand
- Department of Neurosurgery, University of Arizona, Tucson, AZ 85724, USA;
- College of Medicine, The University of Arizona College of Medicine, Tucson, AZ 85004, USA
| |
Collapse
|
16
|
Fang P, Yu LW, Espey H, Agirman G, Kazmi SA, Li K, Deng Y, Lee J, Hrncir H, Romero-Lopez A, Arnold AP, Hsiao EY. Sex-dependent interactions between prodromal intestinal inflammation and LRRK2 G2019S in mice promote endophenotypes of Parkinson's disease. Commun Biol 2024; 7:570. [PMID: 38750146 PMCID: PMC11096388 DOI: 10.1038/s42003-024-06256-9] [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: 02/29/2024] [Accepted: 04/26/2024] [Indexed: 05/18/2024] Open
Abstract
Gastrointestinal (GI) disruptions and inflammatory bowel disease (IBD) are commonly associated with Parkinson's disease (PD), but how they may impact risk for PD remains poorly understood. Herein, we provide evidence that prodromal intestinal inflammation expedites and exacerbates PD endophenotypes in rodent carriers of the human PD risk allele LRRK2 G2019S in a sex-dependent manner. Chronic intestinal damage in genetically predisposed male mice promotes α-synuclein aggregation in the substantia nigra, loss of dopaminergic neurons and motor impairment. This male bias is preserved in gonadectomized males, and similarly conferred by sex chromosomal complement in gonadal females expressing human LRRK2 G2019S. The early onset and heightened severity of neuropathological and behavioral outcomes in male LRRK2 G2019S mice is preceded by increases in α-synuclein in the colon, α-synuclein-positive macrophages in the colonic lamina propria, and loads of phosphorylated α-synuclein within microglia in the substantia nigra. Taken together, these data reveal that prodromal intestinal inflammation promotes the pathogenesis of PD endophenotypes in male carriers of LRRK2 G2019S, through mechanisms that depend on genotypic sex and involve early accumulation of α-synuclein in myeloid cells within the gut.
Collapse
Affiliation(s)
- Ping Fang
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
| | - Lewis W Yu
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hannah Espey
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Gulistan Agirman
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Sabeen A Kazmi
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Kai Li
- F. Widjaja Foundation Inflammatory Bowel & Immunobiology Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
- Research Division of Immunology, Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
| | - Yongning Deng
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Neurology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jamie Lee
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Haley Hrncir
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Arlene Romero-Lopez
- UCLA Goodman-Luskin Microbiome Center, Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA, 90095, USA
| | - Arthur P Arnold
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Elaine Y Hsiao
- Department of Integrative Biology & Physiology, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- UCLA Goodman-Luskin Microbiome Center, Vatche and Tamar Manoukian Division of Digestive Diseases, Department of Medicine, David Geffen School of Medicine, Los Angeles, CA, 90095, USA.
- Department of Microbiology, Immunology, and Molecular Genetics, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
| |
Collapse
|
17
|
Zhang C, Bo R, Zhou T, Chen N, Yuan Y. The raphe nuclei are the early lesion site of gastric α-synuclein propagation to the substantia nigra. Acta Pharm Sin B 2024; 14:2057-2076. [PMID: 38799632 PMCID: PMC11119576 DOI: 10.1016/j.apsb.2024.01.015] [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: 09/23/2023] [Revised: 12/14/2023] [Accepted: 01/05/2024] [Indexed: 05/29/2024] Open
Abstract
Parkinson's disease (PD) is a neurodegeneration disease with α-synuclein accumulated in the substantia nigra pars compacta (SNpc) and most of the dopaminergic neurons are lost in SNpc while patients are diagnosed with PD. Exploring the pathology at an early stage contributes to the development of the disease-modifying strategy. Although the "gut-brain" hypothesis is proposed to explain the underlying mechanism, where the earlier lesioned site in the brain of gastric α-synuclein and how α-synuclein further spreads are not fully understood. Here we report that caudal raphe nuclei (CRN) are the early lesion site of gastric α-synuclein propagating through the spinal cord, while locus coeruleus (LC) and substantia nigra pars compacta (SNpc) were further affected over a time frame of 7 months. Pathological α-synuclein propagation via CRN leads to neuron loss and disordered neuron activity, accompanied by abnormal motor and non-motor behavior. Potential neuron circuits are observed among CRN, LC, and SNpc, which contribute to the venerability of dopaminergic neurons in SNpc. These results show that CRN is the key region for the gastric α-synuclein spread to the midbrain. Our study provides valuable details for the "gut-brain" hypothesis and proposes a valuable PD model for future research on early PD intervention.
Collapse
Affiliation(s)
| | | | - Tiantian Zhou
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Materia Medica, Beijing 100050, China
| | - Naihong Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Materia Medica, Beijing 100050, China
| | - Yuhe Yuan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Chinese Academy of Medical Sciences & Peking Union Medical College Institute of Materia Medica, Beijing 100050, China
| |
Collapse
|
18
|
Facchin S, Bertin L, Bonazzi E, Lorenzon G, De Barba C, Barberio B, Zingone F, Maniero D, Scarpa M, Ruffolo C, Angriman I, Savarino EV. Short-Chain Fatty Acids and Human Health: From Metabolic Pathways to Current Therapeutic Implications. Life (Basel) 2024; 14:559. [PMID: 38792581 PMCID: PMC11122327 DOI: 10.3390/life14050559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/24/2024] [Accepted: 04/25/2024] [Indexed: 05/26/2024] Open
Abstract
The gastrointestinal tract is home to trillions of diverse microorganisms collectively known as the gut microbiota, which play a pivotal role in breaking down undigested foods, such as dietary fibers. Through the fermentation of these food components, short-chain fatty acids (SCFAs) such as acetate, propionate, and butyrate are produced, offering numerous health benefits to the host. The production and absorption of these SCFAs occur through various mechanisms within the human intestine, contingent upon the types of dietary fibers reaching the gut and the specific microorganisms engaged in fermentation. Medical literature extensively documents the supplementation of SCFAs, particularly butyrate, in the treatment of gastrointestinal, metabolic, cardiovascular, and gut-brain-related disorders. This review seeks to provide an overview of the dynamics involved in the production and absorption of acetate, propionate, and butyrate within the human gut. Additionally, it will focus on the pivotal roles these SCFAs play in promoting gastrointestinal and metabolic health, as well as their current therapeutic implications.
Collapse
Affiliation(s)
- Sonia Facchin
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Luisa Bertin
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Erica Bonazzi
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Greta Lorenzon
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Caterina De Barba
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Brigida Barberio
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Fabiana Zingone
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Daria Maniero
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| | - Marco Scarpa
- General Surgery Unit, Department of Surgery, Oncology and Gastroenterology, University of Padova, 35138 Padua, Italy (C.R.); (I.A.)
| | - Cesare Ruffolo
- General Surgery Unit, Department of Surgery, Oncology and Gastroenterology, University of Padova, 35138 Padua, Italy (C.R.); (I.A.)
| | - Imerio Angriman
- General Surgery Unit, Department of Surgery, Oncology and Gastroenterology, University of Padova, 35138 Padua, Italy (C.R.); (I.A.)
| | - Edoardo Vincenzo Savarino
- Department of Surgery, Oncology and Gastroenterology (DISCOG), University Hospital of Padua, 35128 Padua, Italy (L.B.); (B.B.)
| |
Collapse
|
19
|
Dautan D, Paslawski W, Montejo SG, Doyon DC, Marangiu R, Kaplitt MG, Chen R, Dawson VL, Zhang X, Dawson TM, Svenningsson P. Gut-Initiated Alpha Synuclein Fibrils Drive Parkinson's Disease Phenotypes: Temporal Mapping of non-Motor Symptoms and REM Sleep Behavior Disorder. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.22.590542. [PMID: 38712208 PMCID: PMC11071367 DOI: 10.1101/2024.04.22.590542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Parkinson's disease (PD) is characterized by progressive motor as well as less recognized non-motor symptoms that arise often years before motor manifestation, including sleep and gastrointestinal disturbances. Despite the heavy burden on the patient's quality of life, these non-motor manifestations are poorly understood. To elucidate the temporal dynamics of the disease, we employed a mouse model involving injection of alpha-synuclein (αSyn) pre-formed fibrils (PFF) in the duodenum and antrum as a gut-brain model of Parkinsonism. Using anatomical mapping of αSyn-PFF propagation and behavioral and physiological characterizations, we unveil a correlation between post-injection time the temporal dynamics of αSyn propagation and non-motor/motor manifestations of the disease. We highlight the concurrent presence of αSyn aggregates in key brain regions, expressing acetylcholine or dopamine, involved in sleep duration, wakefulness, and particularly REM-associated atonia corresponding to REM behavioral disorder-like symptoms. This study presents a novel and in-depth exploration into the multifaceted nature of PD, unraveling the complex connections between α-synucleinopathies, gut-brain connectivity, and the emergence of non-motor phenotypes.
Collapse
Affiliation(s)
- Daniel Dautan
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Wojciech Paslawski
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Sergio G. Montejo
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Daniel C. Doyon
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Roberta Marangiu
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
- Division of Neurosurgery, Department of Neurosurgery, New-York Hospital-Cornell Medical College, New York, NY, USA
| | - Michael G. Kaplitt
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
- Division of Neurosurgery, Department of Neurosurgery, New-York Hospital-Cornell Medical College, New York, NY, USA
| | - Rong Chen
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Valina L. Dawson
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA
- Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Xiaoaun Zhang
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Ted M. Dawson
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Neurology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Solomon H. Snyder Department of Neuroscience, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Per Svenningsson
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| |
Collapse
|
20
|
Ortiz de Ora L, Balsamo JM, Uyeda KS, Bess EN. Discovery of a Gut Bacterial Metabolic Pathway that Drives α-Synuclein Aggregation. ACS Chem Biol 2024; 19:1011-1021. [PMID: 38517270 PMCID: PMC11040608 DOI: 10.1021/acschembio.4c00095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/06/2024] [Accepted: 03/11/2024] [Indexed: 03/23/2024]
Abstract
Parkinson's disease (PD) etiology is associated with aggregation and accumulation of α-synuclein (α-syn) proteins in midbrain dopaminergic neurons. Emerging evidence suggests that in certain subtypes of PD, α-syn aggregates originate in the gut and subsequently spread to the brain. However, mechanisms that instigate α-syn aggregation in the gut have remained elusive. In the brain, the aggregation of α-syn is induced by oxidized dopamine. Such a mechanism has not been explored in the context of the gastrointestinal tract, a niche harboring 46% of the body's dopamine reservoirs. Here, we report that Enterobacteriaceae, a bacterial family prevalent in human gut microbiotas, induce α-syn aggregation. More specifically, our in vitro data indicate that respiration of nitrate by Escherichia coli K-12, which results in production of nitrite that mediates oxidation of Fe2+ to Fe3+, creates an oxidizing redox potential. These oxidizing conditions enabled the formation of dopamine-derived quinones and α-syn aggregates. Exposing nitrite, but not nitrate, to enteroendocrine STC-1 cells induced aggregation of α-syn that is natively expressed in these cells, which line the intestinal tract. Taken together, our findings indicate that bacterial nitrate reduction may be critical for initiating intestinal α-syn aggregation.
Collapse
Affiliation(s)
- Lizett Ortiz de Ora
- Department
of Chemistry, University of California, Irvine, California 92617, United States
| | - Julia M. Balsamo
- Department
of Chemistry, University of California, Irvine, California 92617, United States
| | - Kylie S. Uyeda
- Department
of Chemistry, University of California, Irvine, California 92617, United States
| | - Elizabeth N. Bess
- Department
of Chemistry, University of California, Irvine, California 92617, United States
- Department
of Molecular Biology and Biochemistry, University
of California, Irvine, California 92617, United States
| |
Collapse
|
21
|
Thomasi B, Valdetaro L, Gulbransen B, Tavares-Gomes AL. Neuroimmune Connectomes in the Gut and Their Implications in Parkinson's Disease. Mol Neurobiol 2024; 61:2081-2098. [PMID: 37840070 PMCID: PMC11151216 DOI: 10.1007/s12035-023-03679-z] [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: 08/26/2022] [Accepted: 09/28/2023] [Indexed: 10/17/2023]
Abstract
The gastrointestinal tract is the largest immune organ and it receives dense innervation from intrinsic (enteric) and extrinsic (sympathetic, parasympathetic, and somatosensory) neurons. The immune and neural systems of the gut communicate with each other and their interactions shape gut defensive mechanisms and neural-controlled gut functions such as motility and secretion. Changes in neuroimmune interactions play central roles in the pathogenesis of diseases such as Parkinson's disease (PD), which is a multicentric disorder that is heterogeneous in its manifestation and pathogenesis. Non-motor and premotor symptoms of PD are common in the gastrointestinal tract and the gut is considered a potential initiation site for PD in some cases. How the enteric nervous system and neuroimmune signaling contribute to PD disease progression is an emerging area of interest. This review focuses on intestinal neuroimmune loops such as the neuroepithelial unit, enteric glial cells and their immunomodulatory effects, anti-inflammatory cholinergic signaling and the relationship between myenteric neurons and muscularis macrophages, and the role of α-synuclein in gut immunity. Special consideration is given to the discussion of intestinal neuroimmune connectomes during PD and their possible implications for various aspects of the disease.
Collapse
Affiliation(s)
- Beatriz Thomasi
- Department of Physiology, Michigan State University, Biomedical and Physical Sciences Building - Gulbransen lab, 567, Wilson Rd, Room 3199, East Lansing, MI, USA.
| | - Luisa Valdetaro
- Department of Molecular Pathobiology, NYU College of Dentistry, New York, NY, USA
| | - Brian Gulbransen
- Department of Physiology, Michigan State University, Biomedical and Physical Sciences Building - Gulbransen lab, 567, Wilson Rd, Room 3199, East Lansing, MI, USA
| | - Ana Lúcia Tavares-Gomes
- Programa de Pós-Graduação Em Neurociências, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| |
Collapse
|
22
|
Liu X, Liu Y, Liu J, Zhang H, Shan C, Guo Y, Gong X, Cui M, Li X, Tang M. Correlation between the gut microbiome and neurodegenerative diseases: a review of metagenomics evidence. Neural Regen Res 2024; 19:833-845. [PMID: 37843219 PMCID: PMC10664138 DOI: 10.4103/1673-5374.382223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 04/19/2023] [Accepted: 06/17/2023] [Indexed: 10/17/2023] Open
Abstract
A growing body of evidence suggests that the gut microbiota contributes to the development of neurodegenerative diseases via the microbiota-gut-brain axis. As a contributing factor, microbiota dysbiosis always occurs in pathological changes of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. High-throughput sequencing technology has helped to reveal that the bidirectional communication between the central nervous system and the enteric nervous system is facilitated by the microbiota's diverse microorganisms, and for both neuroimmune and neuroendocrine systems. Here, we summarize the bioinformatics analysis and wet-biology validation for the gut metagenomics in neurodegenerative diseases, with an emphasis on multi-omics studies and the gut virome. The pathogen-associated signaling biomarkers for identifying brain disorders and potential therapeutic targets are also elucidated. Finally, we discuss the role of diet, prebiotics, probiotics, postbiotics and exercise interventions in remodeling the microbiome and reducing the symptoms of neurodegenerative diseases.
Collapse
Affiliation(s)
- Xiaoyan Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yi Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
- Institute of Animal Husbandry, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu Province, China
| | - Junlin Liu
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Hantao Zhang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Chaofan Shan
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Yinglu Guo
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Xun Gong
- Department of Rheumatology & Immunology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province, China
| | - Mengmeng Cui
- Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong Province, China
| | - Xiubin Li
- Department of Neurology, The Second Affiliated Hospital of Shandong First Medical University, Taian, Shandong Province, China
| | - Min Tang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu Province, China
| |
Collapse
|
23
|
Saleh MA, Amer-Sarsour F, Berant A, Pasmanik-Chor M, Kobo H, Sharabi Y, Vatine GD, Ashkenazi A. Chronic and acute exposure to rotenone reveals distinct Parkinson's disease-related phenotypes in human iPSC-derived peripheral neurons. Free Radic Biol Med 2024; 213:164-173. [PMID: 38246514 DOI: 10.1016/j.freeradbiomed.2024.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 01/12/2024] [Indexed: 01/23/2024]
Abstract
Peripheral autonomic nervous system (P-ANS) dysfunction is a critical non-motor phenotype of Parkinson's disease (PD). The majority of PD cases are sporadic and lack identified PD-associated genes involved. Epidemiological and animal model studies suggest an association with pesticides and other environmental toxins. However, the cellular mechanisms underlying toxin induced P-ANS dysfunctions remain unclear. Here, we mapped the global transcriptome changes in human induced pluripotent stem cell (iPSC) derived P-ANS sympathetic neurons during inhibition of the mitochondrial respiratory chain by the PD-related pesticide, rotenone. We revealed distinct transcriptome profiles between acute and chronic exposure to rotenone. In the acute stage, there was a down regulation of specific cation channel genes, known to mediate electrophysiological activity, while in the chronic stage, the human P-ANS neurons exhibited dysregulation of anti-apoptotic and Golgi apparatus-related pathways. Moreover, we identified the sodium voltage-gated channel subunit SCN3A/Nav1.3 as a potential biomarker in human P-ANS neurons associated with PD. Our analysis of the rotenone-altered coding and non-coding transcriptome of human P-ANS neurons may thus provide insight into the pathological signaling events in the sympathetic neurons during PD progression.
Collapse
Affiliation(s)
- Mahmood Ali Saleh
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel; The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Fatima Amer-Sarsour
- The Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Asaf Berant
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel; The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel
| | - Metsada Pasmanik-Chor
- Bioinformatics Unit, George Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Hila Kobo
- Genomics Research Unit, George Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Yehonatan Sharabi
- Hypertension Unit, Department of Medicine, Sheba Medical Center, Tel Hashomer and Faculty of Medicine, Tel Aviv University, Israel
| | - Gad D Vatine
- The Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel; The Regenerative Medicine and Stem Cell (RMSC) Research Center, Ben-Gurion University of the Negev, 8410501, Beer Sheva, Israel.
| | - Avraham Ashkenazi
- The Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, 6997801, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, 6997801, Tel Aviv, Israel.
| |
Collapse
|
24
|
Yamakado H, Takahashi R. Experimental Animal Models of Prodromal Parkinson's Disease. JOURNAL OF PARKINSON'S DISEASE 2024:JPD230393. [PMID: 38427504 DOI: 10.3233/jpd-230393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
There is an estimated 35-45% loss of striatal dopamine at the time of diagnosis of Parkinson's disease (PD), and cases clinically diagnosed in the early stages may already be pathologically in advanced stages. Recent large-scale clinical trials of disease-modifying therapies (DMT) also suggest the necessity of targeting patients at earlier stages of the disease. From this perspective, the prodromal phase of PD is currently the focus of attention, emphasizing the need for a prodromal mouse model that accurately reflects the pathophysiology, along with early biomarkers. To establish prodromal animal model of PD with high face validity that reflects the disease state, the model must possess high construct validity that accurately incorporates clinical and pathological features in the prodromal phase. Furthermore, as a preclinical model of DMT, the model must possess high predictive validity to accurately evaluate the response to intervention. This review provides an overview of animal models which reflect the characteristics of prodromal PD, including alpha-synuclein (aS) accumulation and associated early non-motor symptoms, with a focus on the aS propagation model and genetic model. In addition, we discuss the challenges associated with these models. The genetic model often fails to induce motor symptoms, while aS propagation models skip the crucial step of initial aS aggregate formation, thereby not fully replicating the entire natural course of the disease. Identifying factors that induce the transition from prodromal to symptomatic phase is important as a preclinical model for DMT to prevent or delay the onset of the disease.
Collapse
Affiliation(s)
- Hodaka Yamakado
- Department of Therapeutics for Multiple System Atrophy, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| |
Collapse
|
25
|
Hu C, Yan Y, Jin Y, Yang J, Xi Y, Zhong Z. Decoding the Cellular Trafficking of Prion-like Proteins in Neurodegenerative Diseases. Neurosci Bull 2024; 40:241-254. [PMID: 37755677 PMCID: PMC10838874 DOI: 10.1007/s12264-023-01115-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 07/02/2023] [Indexed: 09/28/2023] Open
Abstract
The accumulation and spread of prion-like proteins is a key feature of neurodegenerative diseases (NDs) such as Alzheimer's disease, Parkinson's disease, or Amyotrophic Lateral Sclerosis. In a process known as 'seeding', prion-like proteins such as amyloid beta, microtubule-associated protein tau, α-synuclein, silence superoxide dismutase 1, or transactive response DNA-binding protein 43 kDa, propagate their misfolded conformations by transforming their respective soluble monomers into fibrils. Cellular and molecular evidence of prion-like propagation in NDs, the clinical relevance of their 'seeding' capacities, and their levels of contribution towards disease progression have been intensively studied over recent years. This review unpacks the cyclic prion-like propagation in cells including factors of aggregate internalization, endo-lysosomal leaking, aggregate degradation, and secretion. Debates on the importance of the role of prion-like protein aggregates in NDs, whether causal or consequent, are also discussed. Applications lead to a greater understanding of ND pathogenesis and increased potential for therapeutic strategies.
Collapse
Affiliation(s)
- Chenjun Hu
- Department of Neurology of the Second Affiliated Hospital and Department of Human Anatomy, Histology and Embryology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yiqun Yan
- Department of Neurology of the Second Affiliated Hospital and Department of Human Anatomy, Histology and Embryology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yanhong Jin
- Department of Neurology of the Second Affiliated Hospital and Department of Human Anatomy, Histology and Embryology, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Jun Yang
- Department of Physiology and Department of Cardiology of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310058, China
| | - Yongmei Xi
- Division of Human Reproduction and Developmental Genetics, Women's Hospital and Institute of Genetics, Zhejiang University School of Medicine, Hangzhou, 310006, China.
| | - Zhen Zhong
- Department of Neurology of the Second Affiliated Hospital and Department of Human Anatomy, Histology and Embryology, Zhejiang University School of Medicine, Hangzhou, 310058, China.
| |
Collapse
|
26
|
Dorion MF, Yaqubi M, Senkevich K, Kieran NW, MacDonald A, Chen CXQ, Luo W, Wallis A, Shlaifer I, Hall JA, Dudley RWR, Glass IA, Stratton JA, Fon EA, Bartels T, Antel JP, Gan-or Z, Durcan TM, Healy LM. MerTK is a mediator of alpha-synuclein fibril uptake by human microglia. Brain 2024; 147:427-443. [PMID: 37671615 PMCID: PMC10834256 DOI: 10.1093/brain/awad298] [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: 03/08/2023] [Revised: 07/26/2023] [Accepted: 08/29/2023] [Indexed: 09/07/2023] Open
Abstract
Mer tyrosine kinase (MerTK) is a receptor tyrosine kinase that mediates non-inflammatory, homeostatic phagocytosis of diverse types of cellular debris. Highly expressed on the surface of microglial cells, MerTK is of importance in brain development, homeostasis, plasticity and disease. Yet, involvement of this receptor in the clearance of protein aggregates that accumulate with ageing and in neurodegenerative diseases has yet to be defined. The current study explored the function of MerTK in the microglial uptake of alpha-synuclein fibrils which play a causative role in the pathobiology of synucleinopathies. Using human primary and induced pluripotent stem cell-derived microglia, the MerTK-dependence of alpha-synuclein fibril internalization was investigated in vitro. Relevance of this pathway in synucleinopathies was assessed through burden analysis of MERTK variants and analysis of MerTK expression in patient-derived cells and tissues. Pharmacological inhibition of MerTK and siRNA-mediated MERTK knockdown both caused a decreased rate of alpha-synuclein fibril internalization by human microglia. Consistent with the non-inflammatory nature of MerTK-mediated phagocytosis, alpha-synuclein fibril internalization was not observed to induce secretion of pro-inflammatory cytokines such as IL-6 or TNF, and downmodulated IL-1β secretion from microglia. Burden analysis in two independent patient cohorts revealed a significant association between rare functionally deleterious MERTK variants and Parkinson's disease in one of the cohorts (P = 0.002). Despite a small upregulation in MERTK mRNA expression in nigral microglia from Parkinson's disease/Lewy body dementia patients compared to those from non-neurological control donors in a single-nuclei RNA-sequencing dataset (P = 5.08 × 10-21), no significant upregulation in MerTK protein expression was observed in human cortex and substantia nigra lysates from Lewy body dementia patients compared to controls. Taken together, our findings define a novel role for MerTK in mediating the uptake of alpha-synuclein fibrils by human microglia, with possible involvement in limiting alpha-synuclein spread in synucleinopathies such as Parkinson's disease. Upregulation of this pathway in synucleinopathies could have therapeutic values in enhancing alpha-synuclein fibril clearance in the brain.
Collapse
Affiliation(s)
- Marie-France Dorion
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Moein Yaqubi
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Konstantin Senkevich
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Human Genetics, McGill University, Montreal H3A 0C7, Canada
| | - Nicholas W Kieran
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Adam MacDonald
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Carol X Q Chen
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Wen Luo
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Amber Wallis
- UK Dementia Research Institute, University College London, London WC1E 6BT, UK
| | - Irina Shlaifer
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Jeffery A Hall
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Roy W R Dudley
- Department of Pediatric Surgery, Division of Neurosurgery, Montreal Children's Hospital, McGill University Health Centers, Montreal H4A 3J1, Canada
| | - Ian A Glass
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | | | - Jo Anne Stratton
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Edward A Fon
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Tim Bartels
- UK Dementia Research Institute, University College London, London WC1E 6BT, UK
| | - Jack P Antel
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Ziv Gan-or
- McGill Parkinson Program and Neurodegenerative Diseases Group, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Human Genetics, McGill University, Montreal H3A 0C7, Canada
| | - Thomas M Durcan
- Early Drug Discovery Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| | - Luke M Healy
- Neuroimmunology Unit, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute-Hospital, McGill University, Montreal H3A 2B4, Canada
| |
Collapse
|
27
|
Li Y, Tong Q, Wang Y, Cheng Y, Geng Y, Tian T, Yuan Y, Fan Y, Lu M, Zhang K. Phosphorylated α-synuclein deposited in Schwann cells interacting with TLR2 mediates cell damage and induces Parkinson's disease autonomic dysfunction. Cell Death Discov 2024; 10:52. [PMID: 38278799 PMCID: PMC10817950 DOI: 10.1038/s41420-024-01824-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 01/14/2024] [Accepted: 01/16/2024] [Indexed: 01/28/2024] Open
Abstract
Despite the significant frequency of autonomic dysfunction (AutD) in Parkinson's disease (PD) patients, its pathogenesis and diagnosis are challenging. Here, we aimed to further explore the mechanism of phosphorylated α-synuclein (p-α-syn) deposited in vagus nerve Schwann cells (SCs) causing SCs damage and PD AutD. 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP, 20 mg/kg) was administrated to C57BL/6 mice twice a week for 35 days. Following the final injection, locomotor functions, gastrointestinal symptoms, urine functions, and cardiovascular system functions were evaluated. Meanwhile, we examined p-α-syn deposited in vagus nerve SCs, Toll-like receptor 2 (TLR2) activation, and SCs loss using immunofluorescence, western blot, and Luxol fast blue staining. In vitro, the rat SCs line RSC96 cells were exposed to α-synuclein preformed fibril (α-syn PFF), and cell viability was detected by CCK8. Co-IP was used to identify the interaction between p-α-syn and TLR2. Furthermore, the role of TLR2 in p-α-syn-mediated SCs damage was confirmed by the administration of CU-CPT22, a specific blocker of TLR2. In vivo, apart from dyskinesia, MPTP mice exhibited constipation, urinary dysfunction, and cardiovascular failure, which were associated with the deposition of p-α-syn in vagus nerve SCs, TLR2 activation, and vagus nerve demyelination. In vitro, stimulation of α-syn PFF induced a time-dependent loss of viability, and p-α-syn deposited in RSC96 cells induced a cellular inflammatory response by interacting with TLR2, resulting in cell dysfunction and apoptosis. However, both SCs inflammatory response and cell viability were alleviated after inhibition of TLR2. Furthermore, 1 h fecal pellets and water content, the frequency of 1 h urine, blood pressure, heart rate, and heart rate variability of mice in the MPTP + CU-CPT22 group were also improved. Our results support the perspective that p-α-syn interacts with TLR2 induced SCs damage and is involved in PD AutD, which sheds fresh light on the mechanism of PD AutD and indicates a promising treatment for PD AutD targeting SCs p-α-syn/ TLR2 signaling pathway.
Collapse
Affiliation(s)
- Yangxia Li
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Qing Tong
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Ye Wang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yue Cheng
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yao Geng
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Tian Tian
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, Nanjing, China
| | - Yongsheng Yuan
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yi Fan
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, Nanjing, China.
| | - Ming Lu
- Jiangsu Key Laboratory of Neurodegeneration, Department of Pharmacology, Nanjing Medical University, Nanjing, China.
| | - Kezhong Zhang
- Department of Neurology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| |
Collapse
|
28
|
Cui Z, Guo FY, Li L, Lu F, Jin CH, Wang X, Liu F. Brazilin-7-acetate, a novel potential drug of Parkinson's disease, hinders the formation of α-synuclein fibril, mitigates cytotoxicity, and decreases oxidative stress. Eur J Med Chem 2024; 264:115965. [PMID: 38056304 DOI: 10.1016/j.ejmech.2023.115965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/06/2023] [Accepted: 11/13/2023] [Indexed: 12/08/2023]
Abstract
Parkinson's disease (PD) is a prevalent neurodegenerative disorder characterized by the accumulation of α-synuclein (α-Syn) aggregates. However, there are currently no effective therapies for PD. Brazilin, an inhibitor of α-Syn aggregation, is unstable and toxic. Therefore, we have developed and synthesized derivatives of brazilin. One of these derivatives, called brazilin-7-acetate (B-7-A), has shown reduced toxicity and a stronger effect on inhibiting α-Syn aggregation. It showed that B-7-A prevented the formation of α-Syn fibers and disrupted existing fibers in a dosage-dependent manner. Additionally, B-7-A significantly reduced the cytotoxicity of α-Syn aggregates and alleviated oxidative stress in PC12 cells. The beneficial effects of B-7-A were also confirmed using the Caenorhabditis elegans model. These effects included preventing the accumulation of α-Syn clumps, improving behavior disorder, increasing lifespan, reducing oxidative stress, and protecting against lipid oxidation and loss. Finally, B-7-A showed good ADMET properties in silico. Based on these findings, B-7-A exhibits potential as a prospective treatment for PD.
Collapse
Affiliation(s)
- Zhan Cui
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, China
| | - Fang-Yan Guo
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, Jilin Province, China
| | - Li Li
- College of Science, Tianjin University of Science & Technology, China
| | - Fuping Lu
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, China
| | - Cheng-Hua Jin
- Key Laboratory of Natural Medicines of the Changbai Mountain, Ministry of Education, College of Pharmacy, Yanbian University, Yanji, Jilin Province, China.
| | - Xiangming Wang
- Department of Cell Biology, School of Basic Medical Science, Capital Medical University, Beijing, China.
| | - Fufeng Liu
- College of Biotechnology, Tianjin University of Science & Technology, Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education, Tianjin Key Laboratory of Industrial Microbiology, Tianjin, China.
| |
Collapse
|
29
|
Miao Y, Meng H. The involvement of α-synucleinopathy in the disruption of microglial homeostasis contributes to the pathogenesis of Parkinson's disease. Cell Commun Signal 2024; 22:31. [PMID: 38216911 PMCID: PMC10785555 DOI: 10.1186/s12964-023-01402-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/18/2023] [Indexed: 01/14/2024] Open
Abstract
The intracellular deposition and intercellular transmission of α-synuclein (α-syn) are shared pathological characteristics among neurodegenerative disorders collectively known as α-synucleinopathies, including Parkinson's disease (PD). Although the precise triggers of α-synucleinopathies remain unclear, recent findings indicate that disruption of microglial homeostasis contributes to the pathogenesis of PD. Microglia play a crucial role in maintaining optimal neuronal function by ensuring a homeostatic environment, but this function is disrupted during the progression of α-syn pathology. The involvement of microglia in the accumulation, uptake, and clearance of aggregated proteins is critical for managing disease spread and progression caused by α-syn pathology. This review summarizes current knowledge on the interrelationships between microglia and α-synucleinopathies, focusing on the remarkable ability of microglia to recognize and internalize extracellular α-syn through diverse pathways. Microglia process α-syn intracellularly and intercellularly to facilitate the α-syn neuronal aggregation and cell-to-cell propagation. The conformational state of α-synuclein distinctly influences microglial inflammation, which can affect peripheral immune cells such as macrophages and lymphocytes and may regulate the pathogenesis of α-synucleinopathies. We also discuss ongoing research efforts to identify potential therapeutic approaches targeting both α-syn accumulation and inflammation in PD. Video Abstract.
Collapse
Affiliation(s)
- Yongzhen Miao
- Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China
| | - Hongrui Meng
- Institute of Neuroscience, Soochow University, Suzhou, Jiangsu, China.
- Department of Neurology and Clinical Research Center of Neurological Disease, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
| |
Collapse
|
30
|
Yang ZX, Zhang Y, Wang Q, Zhang L, Liu YF, Zhang Y, Ren Y, Zhou C, Gao HW, Zhang NX, Feng LY. Addition of α-synuclein aggregates to the intestinal environment recapitulates Parkinsonian symptoms in model systems. Acta Pharmacol Sin 2024; 45:36-51. [PMID: 37684382 PMCID: PMC10770087 DOI: 10.1038/s41401-023-01150-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 08/02/2023] [Indexed: 09/10/2023] Open
Abstract
The gut-brain axis plays a vital role in Parkinson's disease (PD). The mechanisms of gut-brain transmission mainly focus on α-synuclein deposition, intestinal inflammation and microbiota function. A few studies have shown the trigger of PD pathology in the gut. α-Synuclein is highly conserved in food products, which was able to form β-folded aggregates and to infect the intestinal mucosa. In this study we investigated whether α-synuclein-preformed fibril (PFF) exposure could modulate the intestinal environment and induce rodent models replicating PD pathology. We first showed that PFF could be internalized into co-cultured Caco-2/HT29/Raji b cells in vitro. Furthermore, we demonstrated that PFF perfusion caused the intestinal inflammation and activation of enteric glial cells in an ex vivo intestinal organ culture and in an in vivo intestinal mouse coloclysis model. Moreover, we found that PFF exposure through regular coloclysis induced PD pathology in wild-type (WT) and A53T α-synuclein transgenic mice with various phenotypes. Particularly in A53T mice, PFF induced significant behavioral disorders, intestinal inflammation, α-synuclein deposition, microbiota dysbiosis, glial activation as well as degeneration of dopaminergic neurons in the substantia nigra. In WT mice, however, the PFF induced only mild behavioral abnormalities, intestinal inflammation, α-synuclein deposition, and glial activation, without significant changes in microbiota and dopaminergic neurons. Our results reveal the possibility of α-synuclein aggregates binding to the intestinal mucosa and modeling PD in mice. This study may shed light on the investigation and early intervention of the gut-origin hypothesis in neurodegenerative diseases.
Collapse
Affiliation(s)
- Ze-Xian Yang
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Yu Zhang
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China.
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong, 264117, China.
| | - Qing Wang
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Lei Zhang
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
| | - Yi-Fei Liu
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
| | - Ye Zhang
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Yu Ren
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China
| | - Chen Zhou
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Hui-Wen Gao
- Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai, Shandong, 264117, China
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 266003, China
| | - Nai-Xia Zhang
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China.
- Analytical Research Center for Organic and Biological Molecules, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
| | - Lin-Yin Feng
- CAS Key Laboratory of Receptor Research, Center for Neurological and Psychiatric Research and Drug Discovery (CNPRDD), Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Shanghai, 201203, China.
- University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China.
| |
Collapse
|
31
|
Weber MA, Kerr G, Thangavel R, Conlon MM, Gumusoglu SB, Gupta K, Abdelmotilib HA, Halhouli O, Zhang Q, Geerling JC, Narayanan NS, Aldridge GM. Alpha-Synuclein Pre-Formed Fibrils Injected into Prefrontal Cortex Primarily Spread to Cortical and Subcortical Structures. JOURNAL OF PARKINSON'S DISEASE 2024; 14:81-94. [PMID: 38189765 PMCID: PMC10836574 DOI: 10.3233/jpd-230129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/13/2023] [Indexed: 01/09/2024]
Abstract
BACKGROUND Parkinson's disease dementia (PDD) and dementia with Lewy bodies (DLB) are characterized by diffuse spread of alpha-synuclein (α-syn) throughout the brain. Patients with PDD and DLB have a neuropsychological pattern of deficits that include executive dysfunction, such as abnormalities in planning, timing, working memory, and behavioral flexibility. The prefrontal cortex (PFC) plays a major role in normal executive function and often develops α-syn aggregates in DLB and PDD. OBJECTIVE To investigate the long-term behavioral and cognitive consequences of α-syn pathology in the cortex and characterize pathological spread of α-syn. METHODS We injected human α-syn pre-formed fibrils into the PFC of wild-type male mice. We then assessed the behavioral and cognitive effects between 12- and 21-months post-injection and characterized the spread of pathological α-syn in cortical, subcortical, and brainstem regions. RESULTS We report that PFC PFFs: 1) induced α-syn aggregation in multiple cortical and subcortical regions with sparse aggregation in midbrain and brainstem nuclei; 2) did not affect interval timing or spatial learning acquisition but did mildly alter behavioral flexibility as measured by intraday reversal learning; and 3) increased open field exploration. CONCLUSIONS This model of cortical-dominant pathology aids in our understanding of how local α-syn aggregation might impact some symptoms in PDD and DLB.
Collapse
Affiliation(s)
- Matthew A. Weber
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Gemma Kerr
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Ramasamy Thangavel
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Mackenzie M. Conlon
- Medical Scientist Training Program, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Serena B. Gumusoglu
- Department of Obstetrics and Gynecology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
| | - Kalpana Gupta
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Hisham A. Abdelmotilib
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Oday Halhouli
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Qiang Zhang
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Joel C. Geerling
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
| | - Nandakumar S. Narayanan
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
| | - Georgina M. Aldridge
- Department of Neurology, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Iowa Neuroscience Institute, University of Iowa, Iowa City, IA, USA
| |
Collapse
|
32
|
Ma XZ, Chen LL, Qu L, Li H, Wang J, Song N, Xie JX. Gut microbiota-induced CXCL1 elevation triggers early neuroinflammation in the substantia nigra of Parkinsonian mice. Acta Pharmacol Sin 2024; 45:52-65. [PMID: 37674043 PMCID: PMC10770039 DOI: 10.1038/s41401-023-01147-x] [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: 03/24/2023] [Accepted: 07/25/2023] [Indexed: 09/08/2023] Open
Abstract
Gut microbiota disturbance and systemic inflammation have been implicated in the degeneration of dopaminergic neurons in Parkinson's disease (PD). How the alteration of gut microbiota results in neuropathological events in PD remains elusive. In this study, we explored whether and how environmental insults caused early neuropathological events in the substantia nigra (SN) of a PD mouse model. Aged (12-month-old) mice were orally administered rotenone (6.25 mg·kg-1·d-1) 5 days per week for 2 months. We demonstrated that oral administration of rotenone to ageing mice was sufficient to establish a PD mouse model and that microglial activation and iron deposition selectively appeared in the SN of the mice prior to loss of motor coordination and dopaminergic neurons, and these events could be fully blocked by microglial elimination with a PLX5622-formulated diet. 16 S rDNA sequencing analysis showed that the gut microbiota in rotenone-treated mice was altered, and mice receiving faecal microbial transplantation (FMT) from ageing mice treated with rotenone for 2 months exhibited the same pathology in the SN. We demonstrated that C-X-C motif chemokine ligand-1 (CXCL1) was an essential molecule, as intravenous injection of CXCL1 mimicked almost all the pathology in serum and SN induced by oral rotenone and FMT. Using metabolomics and transcriptomics analyses, we identified the PPAR pathway as a key pathway involved in rotenone-induced neuronal damage. Inhibition of the PPARγ pathway was consistent in the above models, whereas its activation by linoleic acid (60 mg·kg-1·d-1, i.g. for 1 week) could block these pathological events in mice intravenously injected with CXCL1. Altogether, these results reveal that the altered gut microbiota resulted in neuroinflammation and iron deposition occurring early in the SN of ageing mice with oral administration of rotenone, much earlier than motor symptoms and dopaminergic neuron loss. We found that CXCL1 plays a crucial role in this process, possibly via PPARγ signalling inhibition. This study may pave the way for understanding the "brain-gut-microbiota" molecular regulatory networks in PD pathogenesis. The aged C57BL/6 male mice with rotenone intragastric administration showed altered gut microbiota, which caused systemic inflammation, PPARγ signalling inhibition and neuroinflammation, brain iron deposition and ferroptosis, and eventually dopaminergic neurodegeneration in PD.
Collapse
Affiliation(s)
- Xi-Zhen Ma
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China
| | - Lei-Lei Chen
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China
| | - Le Qu
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China
| | - Hui Li
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China
| | - Jun Wang
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China
| | - Ning Song
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China.
| | - Jun-Xia Xie
- Institute of Brain Science and Disease, School of Basic Medicine, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders, Qingdao University, Qingdao, 266021, China.
| |
Collapse
|
33
|
Tarutani A, Hasegawa M. Ultrastructures of α-Synuclein Filaments in Synucleinopathy Brains and Experimental Models. J Mov Disord 2024; 17:15-29. [PMID: 37990381 PMCID: PMC10846975 DOI: 10.14802/jmd.23213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/11/2023] [Accepted: 11/22/2023] [Indexed: 11/23/2023] Open
Abstract
Intracellular α-synuclein (α-syn) inclusions are a neuropathological hallmark of Lewy body disease (LBD) and multiple system atrophy (MSA), both of which are termed synucleinopathies. LBD is defined by Lewy bodies and Lewy neurites in neurons, while MSA displays glial cytoplasmic inclusions in oligodendrocytes. Pathological α-syn adopts an ordered filamentous structure with a 5-10 nm filament diameter, and this conformational change has been suggested to be involved in the disease onset and progression. Synucleinopathies also exhibit characteristic ultrastructural and biochemical properties of α-syn filaments, and α-syn strains with distinct conformations have been identified. Numerous experimental studies have supported the idea that pathological α-syn self-amplifies and spreads throughout the brain, during which processes the conformation of α-syn filaments may drive the disease specificity. In this review, we summarize the ultrastructural features and heterogeneity of α-syn filaments in the brains of patients with synucleinopathy and in experimental models of seeded α-syn aggregation.
Collapse
Affiliation(s)
- Airi Tarutani
- Department of Brain and Neurosciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Masato Hasegawa
- Department of Brain and Neurosciences, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| |
Collapse
|
34
|
Sampson T. Circulating Extracellular Vesicles as a Potential Mediator of Synuclein Pathology in the Gut. Mov Disord 2024; 39:3-5. [PMID: 38294044 PMCID: PMC10832292 DOI: 10.1002/mds.29673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 02/01/2024] Open
Abstract
The spread of pathological alpha-synuclein (aSyn) from the gastrointestinal tract to the brain, or the brain to the intestine, is of increasing interest given observations in experimental models. While there has been a focus on neuronal-mediated spread and propagation, non-neuronal reservoirs of aSyn are also present. In this issue, Yang et al describe the ability of extracellular vesicles, derived from red blood cells in circulation to mediate the deposition of aSyn into the GI tract. These vesicles may therefore represent a potential non-neuronal pathway by which aSyn may spread across body sites in the initiation and progression of Parkinson’s disease and other synucleinopathies.
Collapse
Affiliation(s)
- Timothy Sampson
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, USA
| |
Collapse
|
35
|
Zhang N, Yan Z, Xin H, Shao S, Xue S, Cespuglio R, Wang S. Relationship among α‑synuclein, aging and inflammation in Parkinson's disease (Review). Exp Ther Med 2024; 27:23. [PMID: 38125364 PMCID: PMC10728906 DOI: 10.3892/etm.2023.12311] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 10/19/2023] [Indexed: 12/23/2023] Open
Abstract
Parkinson's disease (PD) is a common neurodegenerative pathology whose major clinical symptoms are movement disorders. The main pathological characteristics of PD are the selective death of dopaminergic (DA) neurons in the pars compacta of the substantia nigra and the presence of Lewy bodies containing α-synuclein (α-Syn) within these neurons. PD is associated with numerous risk factors, including environmental factors, genetic mutations and aging. In many cases, the complex interplay of numerous risk factors leads to the onset of PD. The mutated α-Syn gene, which expresses pathologicalα-Syn protein, can cause PD. Another important feature of PD is neuroinflammation, which is conducive to neuronal death. α-Syn is able to interact with certain cell types in the brain, including through phagocytosis and degradation of α-Syn by glial cells, activation of inflammatory pathways by α-Syn in glial cells, transmission of α-Syn between glial cells and neurons, and interactions between peripheral immune cells and α-Syn. In addition to the aforementioned risk factors, PD may also be associated with aging, as the prevalence of PD increases with advancing age. The aging process impairs the cellular clearance mechanism, which leads to chronic inflammation and the accumulation of intracellular α-Syn, which results in DA neuronal death. In the present review, the age-associated α-Syn pathogenicity and the interactions between α-Syn and certain types of cells within the brain are discussed to facilitate understanding of the mechanisms of PD pathogenesis, which may potentially provide insight for the future clinical treatment of PD.
Collapse
Affiliation(s)
- Nianping Zhang
- Postdoctoral Mobile Station, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
| | - Zhaoli Yan
- Department of Neurosurgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250014, P.R. China
| | - Hua Xin
- Department of Neurology, People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Shuai Shao
- Department of Reproductive Medicine, Jingmen People's Hospital, Jingmen, Hubei 448000, P.R. China
| | - Song Xue
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
| | - Raymond Cespuglio
- Neuroscience Research Center of Lyon (CNRL), Claude-Bernard Lyon-1 University, 69500 Lyon, France
| | - Shijun Wang
- Department of Pathology, College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, Shandong 250355, P.R. China
| |
Collapse
|
36
|
Khoshnan A. Gut Microbiota as a Modifier of Huntington's Disease Pathogenesis. J Huntingtons Dis 2024; 13:133-147. [PMID: 38728199 PMCID: PMC11307070 DOI: 10.3233/jhd-240012] [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] [Accepted: 04/07/2024] [Indexed: 05/12/2024]
Abstract
Huntingtin (HTT) protein is expressed in most cell lineages, and the toxicity of mutant HTT in multiple organs may contribute to the neurological and psychiatric symptoms observed in Huntington's disease (HD). The proteostasis and neurotoxicity of mutant HTT are influenced by the intracellular milieu and responses to environmental signals. Recent research has highlighted a prominent role of gut microbiota in brain and immune system development, aging, and the progression of neurological disorders. Several studies suggest that mutant HTT might disrupt the homeostasis of gut microbiota (known as dysbiosis) and impact the pathogenesis of HD. Dysbiosis has been observed in HD patients, and in animal models of the disease it coincides with mutant HTT aggregation, abnormal behaviors, and reduced lifespan. This review article aims to highlight the potential toxicity of mutant HTT in organs and pathways within the microbiota-gut-immune-central nervous system (CNS) axis. Understanding the functions of Wild-Type (WT) HTT and the toxicity of mutant HTT in these organs and the associated networks may elucidate novel pathogenic pathways, identify biomarkers and peripheral therapeutic targets for HD.
Collapse
Affiliation(s)
- Ali Khoshnan
- Keck School of Medicine, Physiology and Neuroscience, University of Southern California, Los Angeles, CA, USA
| |
Collapse
|
37
|
Chandra R, Sokratian A, Chavez KR, King S, Swain SM, Snyder JC, West AB, Liddle RA. Gut mucosal cells transfer α-synuclein to the vagus nerve. JCI Insight 2023; 8:e172192. [PMID: 38063197 PMCID: PMC10795834 DOI: 10.1172/jci.insight.172192] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 10/27/2023] [Indexed: 12/18/2023] Open
Abstract
Epidemiological and histopathological findings have raised the possibility that misfolded α-synuclein protein might spread from the gut to the brain and increase the risk of Parkinson's disease. Although past experimental studies in mouse models have relied on gut injections of exogenous recombinant α-synuclein fibrils to study gut-to-brain α-synuclein transfer, the possible origins of misfolded α-synuclein within the gut have remained elusive. We recently demonstrated that sensory cells of intestinal mucosa express α-synuclein. Here, we employed mouse intestinal organoids expressing human α-synuclein to observe the transfer of α-synuclein protein from epithelial cells in organoids to cocultured nodose neurons devoid of α-synuclein. In mice expressing human α-synuclein, but no mouse α-synuclein, α-synuclein fibril-templating activity emerged in α-synuclein-seeded fibril aggregation assays in intestine, vagus nerve, and dorsal motor nucleus. In newly engineered transgenic mice that restrict pathological human α-synuclein expression to intestinal epithelial cells, α-synuclein fibril-templating activity transfered to the vagus nerve and dorsal motor nucleus. Subdiaphragmatic vagotomy prior to induction of α-synuclein expression in intestinal epithelial cells effectively protected the hindbrain from emergence of α-synuclein fibril-templating activity. Overall, these findings highlight a potential non-neuronal source of fibrillar α-synuclein protein that might arise in gut mucosal cells.
Collapse
Affiliation(s)
| | | | | | | | | | - Joshua C. Snyder
- Department of Surgery, and
- Department of Cell Biology, Duke University, Durham, North Carolina, USA
| | - Andrew B. West
- Department of Pharmacology and Cancer Biology
- Duke Institute for Brain Sciences, Durham, North Carolina, USA
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland, USA
| | - Rodger A. Liddle
- Department of Medicine
- Duke Institute for Brain Sciences, Durham, North Carolina, USA
- Aligning Science Across Parkinson’s (ASAP) Collaborative Research Network, Chevy Chase, Maryland, USA
- Department of Veterans Affairs, Chevy Chase, Maryland, USA
| |
Collapse
|
38
|
Sampson T. Microbial amyloids in neurodegenerative amyloid diseases. FEBS J 2023:10.1111/febs.17023. [PMID: 38041542 PMCID: PMC11144261 DOI: 10.1111/febs.17023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/13/2023] [Accepted: 11/30/2023] [Indexed: 12/03/2023]
Abstract
Human-disease associated amyloidogenic proteins are not unique in their ability to form amyloid fibrillar structures. Numerous microbes produce amyloidogenic proteins that have distinct functions for their physiology in their amyloid form, rather than solely detrimental. Emerging data indicate associations between various microbial organisms, including those which produce functional amyloids, with neurodegenerative diseases. Here, we review some of the evidence suggesting that microbial amyloids impact amyloid disease in host organisms. Experimental data are building a foundation for continued lines of enquiry and suggest that that direct or indirect interactions between microbial and host amyloids may be a contributor to amyloid pathologies. Inhibiting microbial amyloids or their interactions with the host may therefore represent a tangible target to limit various amyloid pathologies.
Collapse
Affiliation(s)
- Timothy Sampson
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA, USA
- Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD, USA
| |
Collapse
|
39
|
Alwani A, Maziarz K, Burda G, Jankowska-Kiełtyka M, Roman A, Łyszczarz G, Er S, Barut J, Barczyk-Woźnicka O, Pyza E, Kreiner G, Nalepa I, Chmielarz P. Investigating the potential effects of α-synuclein aggregation on susceptibility to chronic stress in a mouse Parkinson's disease model. Pharmacol Rep 2023; 75:1474-1487. [PMID: 37725330 PMCID: PMC10661792 DOI: 10.1007/s43440-023-00530-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 08/30/2023] [Accepted: 09/03/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND Parkinson's disease (PD) is a motor disorder characterized by the degeneration of dopaminergic neurons, putatively due to the accumulation of α-synuclein (α-syn) in Lewy bodies (LBs) in Substantia Nigra. PD is also associated with the formation of LBs in brain areas responsible for emotional and cognitive regulation such as the amygdala and prefrontal cortex, and concurrent depression prevalence in PD patients. The exact link between dopaminergic cell loss, α-syn aggregation, depression, and stress, a major depression risk factor, is unclear. Therefore, we aimed to explore the interplay between sensitivity to chronic stress and α-syn aggregation. METHODS Bilateral injections of α-syn preformed fibrils (PFFs) into the striatum of C57Bl/6 J mice were used to induce α-syn aggregation. Three months after injections, animals were exposed to chronic social defeat stress. RESULTS α-syn aggregation did not affect stress susceptibility but independently caused increased locomotor activity in the open field test, reduced anxiety in the light-dark box test, and increased active time in the tail suspension test. Ex vivo analysis revealed modest dopaminergic neuron loss in the substantia nigra and reduced dopaminergic innervation in the dorsal striatum in PFFs injected groups. α-Syn aggregates were prominent in the amygdala, prefrontal cortex, and substantia nigra, with minimal α-syn aggregation in the raphe nuclei and locus coeruleus. CONCLUSIONS Progressive bilateral α-syn aggregation might lead to compensatory activity increase and alterations in emotionally regulated behavior, without affecting stress susceptibility. Understanding how α-syn aggregation and degeneration in specific brain structures contribute to depression and anxiety in PD patients requires further investigation.
Collapse
Affiliation(s)
- Anna Alwani
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Katarzyna Maziarz
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Gabriela Burda
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Monika Jankowska-Kiełtyka
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Adam Roman
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Gabriela Łyszczarz
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Safak Er
- Faculty of Pharmacy, Drug Research Program, University of Helsinki, Helsinki, Finland
- Institute of Biotechnology, HiLIFE, University of Helsinki, Helsinki, Finland
| | - Justyna Barut
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Olga Barczyk-Woźnicka
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland
| | - Elżbieta Pyza
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, Gronostajowa 9, 30-387, Kraków, Poland
| | - Grzegorz Kreiner
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Irena Nalepa
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland
| | - Piotr Chmielarz
- Department of Brain Biochemistry, Maj Institute of Pharmacology, Polish Academy of Sciences, Smętna 12, 31-343, Kraków, Poland.
| |
Collapse
|
40
|
Endres K, Schäfer KH. Could microbiota transfer between cohabitants influence Alzheimer disease risk? Nat Rev Neurol 2023; 19:713-714. [PMID: 37864078 DOI: 10.1038/s41582-023-00894-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/13/2023] [Indexed: 10/22/2023]
Affiliation(s)
- Kristina Endres
- Department of Psychiatry and Psychotherapy, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany.
| | - Karl-Herbert Schäfer
- Working Group Enteric Nervous System, University of Applied Sciences, Kaiserslautern, Germany
| |
Collapse
|
41
|
Claudino Dos Santos JC, Oliveira LF, Noleto FM, Gusmão CTP, Brito GADC, Viana GSDB. Gut-microbiome-brain axis: the crosstalk between the vagus nerve, alpha-synuclein and the brain in Parkinson's disease. Neural Regen Res 2023; 18:2611-2614. [PMID: 37449597 DOI: 10.4103/1673-5374.373673] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023] Open
Abstract
This critical review of the literature shows that there is a close link between the microbiome, the gut, and the brain in Parkinson's disease. The vagus nerve, the main component of the parasympathetic nervous system, is involved in the regulation of immune response, digestion, heart rate, and control of mood. It can detect microbiota metabolites through its afferents, transferring this gut information to the central nervous system. Preclinical and clinical studies have shown the important role played by the gut microbiome and gut-related factors in disease development and progression, as well as treatment responses. These findings suggest that the gut microbiome may be a valuable target for new therapeutic strategies for Parkinson's disease. More studies are needed to better understand the underlying biology and how this axis can be modulated for the patient's benefit.
Collapse
Affiliation(s)
- Júlio César Claudino Dos Santos
- Christus University Center - UNICHRISTUS, Fortaleza; Postgraduate Program in Morphofunctional Sciences, Federal University of Ceará - UFC, Fortaleza, CE, Brazil
| | | | | | | | - Gerly Anne de Castro Brito
- Postgraduate Program in Morphofunctional Sciences, Federal University of Ceará - UFC; Physiology and Pharmacology Department of the Federal University of Ceará - UFC, Fortaleza, CE, Brazil, Fortaleza
| | | |
Collapse
|
42
|
McFleder RL, Makhotkina A, Groh J, Keber U, Imdahl F, Peña Mosca J, Peteranderl A, Wu J, Tabuchi S, Hoffmann J, Karl AK, Pagenstecher A, Vogel J, Beilhack A, Koprich JB, Brotchie JM, Saliba AE, Volkmann J, Ip CW. Brain-to-gut trafficking of alpha-synuclein by CD11c + cells in a mouse model of Parkinson's disease. Nat Commun 2023; 14:7529. [PMID: 37981650 PMCID: PMC10658151 DOI: 10.1038/s41467-023-43224-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 11/03/2023] [Indexed: 11/21/2023] Open
Abstract
Inflammation in the brain and gut is a critical component of several neurological diseases, such as Parkinson's disease (PD). One trigger of the immune system in PD is aggregation of the pre-synaptic protein, α-synuclein (αSyn). Understanding the mechanism of propagation of αSyn aggregates is essential to developing disease-modifying therapeutics. Using a brain-first mouse model of PD, we demonstrate αSyn trafficking from the brain to the ileum of male mice. Immunohistochemistry revealed that the ileal αSyn aggregations are contained within CD11c+ cells. Using single-cell RNA sequencing, we demonstrate that ileal CD11c+ cells are microglia-like and the same subtype of cells is activated in the brain and ileum of PD mice. Moreover, by utilizing mice expressing the photo-convertible protein, Dendra2, we show that CD11c+ cells traffic from the brain to the ileum. Together these data provide a mechanism of αSyn trafficking between the brain and gut.
Collapse
Affiliation(s)
- Rhonda L McFleder
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | | | - Janos Groh
- Institute of Neuronal Cell Biology, Technical University Munich, Munich, Germany
| | - Ursula Keber
- Department of Neuropathology, Philipps University of Marburg, Marburg, Germany
| | - Fabian Imdahl
- Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz-Center for Infection Research (HZI), Würzburg, Germany
| | - Josefina Peña Mosca
- Department of Internal Medicine II, Center for Experimental Molecular Medicine (ZEMM), Würzburg University Hospital, Würzburg, Germany
| | - Alina Peteranderl
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Jingjing Wu
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Sawako Tabuchi
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Jan Hoffmann
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Ann-Kathrin Karl
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Axel Pagenstecher
- Department of Neuropathology, Philipps University of Marburg, Marburg, Germany
| | - Jörg Vogel
- Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz-Center for Infection Research (HZI), Würzburg, Germany
| | - Andreas Beilhack
- Department of Internal Medicine II, Center for Experimental Molecular Medicine (ZEMM), Würzburg University Hospital, Würzburg, Germany
| | - James B Koprich
- Atuka Inc., Toronto, ON, Canada
- Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Jonathan M Brotchie
- Atuka Inc., Toronto, ON, Canada
- Krembil Research Institute, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
| | - Antoine-Emmanuel Saliba
- Helmholtz Institute for RNA-based Infection Research (HIRI), Helmholtz-Center for Infection Research (HZI), Würzburg, Germany
- Faculty of Medicine, Institute of Molecular Infection Biology (IMIB), University of Würzburg, Josef-Schneider-Str. 2, 97080, Würzburg, Germany
| | - Jens Volkmann
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany
| | - Chi Wang Ip
- Department of Neurology, University Hospital of Würzburg, Würzburg, Germany.
| |
Collapse
|
43
|
Harms AS, Yang YT, Tansey MG. Central and peripheral innate and adaptive immunity in Parkinson's disease. Sci Transl Med 2023; 15:eadk3225. [PMID: 37939158 DOI: 10.1126/scitranslmed.adk3225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Parkinson's disease (PD) is a multisystem disorder with characteristics of a chronic inflammatory disease. To develop effective immunomodulatory interventions to combat PD, we need to think innovatively about the implications of orchestrated central and peripheral innate and adaptive immune responses that occur as the disease begins and progresses.
Collapse
Affiliation(s)
- Ashley S Harms
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA
- Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA
| | - Ya-Ting Yang
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA
- Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA
| | - Malú Gámez Tansey
- Aligning Science Across Parkinson's Collaborative Research Network, Chevy Chase, MD, USA
- Department of Neuroscience, University of Florida College of Medicine, Gainesville, FL, USA
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine, Gainesville, FL, USA
- McKnight Brain Institute, University of Florida, Gainesville, FL, USA
- Norman Fixel Institute for Neurological Diseases, University of Florida Health, Gainesville, FL, USA
| |
Collapse
|
44
|
Sun J, Ludvigsson JF, Roelstraete B, Pedersen NL, Pawitan Y, Wirdefeldt K, Fang F. Gastrointestinal biopsy of normal mucosa or nonspecific inflammation and risk of neurodegenerative disease: Nationwide matched cohort study. Eur J Neurol 2023; 30:3430-3439. [PMID: 36447380 DOI: 10.1111/ene.15654] [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: 06/19/2022] [Revised: 10/02/2022] [Accepted: 11/24/2022] [Indexed: 12/02/2022]
Abstract
BACKGROUND AND PURPOSE Evidence has accumulated to support the early involvement of altered gastrointestinal (GI) function in neurodegenerative disease. However, risk of Alzheimer disease (AD) and Parkinson disease (PD) among individuals with a GI biopsy of normal mucosa or nonspecific inflammation is unknown. METHODS This matched cohort study included all individuals in Sweden with a GI biopsy of normal mucosa (n = 480,346) or nonspecific inflammation (n = 655,937) during 1965-2016 (exposed group) as well as their individually matched population references and unexposed full siblings. A flexible parametric model and stratified Cox model were used to estimate hazard ratio (HR) and its 95% confidence interval (CI). RESULTS Individuals with normal mucosa or nonspecific inflammation had a higher risk of AD and PD during the 20 years after biopsy. Compared with the population references, individuals with normal mucosa had an increased risk of AD (incidence rate [IR] difference = 13.53 per 100,000 person-years, HR [95% CI] = 1.15 [1.11-1.20]) and PD (IR difference = 6.72, HR [95% CI] = 1.16 [1.10-1.23]). Elevated risk was also observed for nonspecific inflammation regarding AD (IR difference = 13.28, HR [95% CI] = 1.11 [1.08-1.14]) and PD (IR difference = 6.83, HR [95% CI] = 1.10 [1.06-1.14]). Similar results were observed in subgroup and sensitivity analyses and when comparing with their unexposed siblings. CONCLUSIONS Individuals with a GI biopsy of normal mucosa or nonspecific inflammation had an increased risk of AD and PD. This adds new evidence of the early involvement of GI dysfunction in neurodegenerative disease.
Collapse
Affiliation(s)
- Jiangwei Sun
- Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Jonas F Ludvigsson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
- Department of Pediatrics, Örebro University Hospital, Örebro, Sweden
- Division of Epidemiology and Public Health, School of Medicine, University of Nottingham, Nottingham, UK
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA
| | - Bjorn Roelstraete
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
| | - Nancy L Pedersen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
| | - Yudi Pawitan
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
| | - Karin Wirdefeldt
- Department of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Fang Fang
- Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| |
Collapse
|
45
|
Bigi A, Cascella R, Cecchi C. α-Synuclein oligomers and fibrils: partners in crime in synucleinopathies. Neural Regen Res 2023; 18:2332-2342. [PMID: 37282450 PMCID: PMC10360081 DOI: 10.4103/1673-5374.371345] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Abstract
The misfolding and aggregation of α-synuclein is the general hallmark of a group of devastating neurodegenerative pathologies referred to as synucleinopathies, such as Parkinson's disease, dementia with Lewy bodies, and multiple system atrophy. In such conditions, a range of different misfolded aggregates, including oligomers, protofibrils, and fibrils, are present both in neurons and glial cells. Growing experimental evidence supports the proposition that soluble oligomeric assemblies, formed during the early phases of the aggregation process, are the major culprits of neuronal toxicity; at the same time, fibrillar conformers appear to be the most efficient at propagating among interconnected neurons, thus contributing to the spreading of α-synuclein pathology. Moreover, α-synuclein fibrils have been recently reported to release soluble and highly toxic oligomeric species, responsible for an immediate dysfunction in the recipient neurons. In this review, we discuss the current knowledge about the plethora of mechanisms of cellular dysfunction caused by α-synuclein oligomers and fibrils, both contributing to neurodegeneration in synucleinopathies.
Collapse
Affiliation(s)
- Alessandra Bigi
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Florence, Italy
| | - Roberta Cascella
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Florence, Italy
| | - Cristina Cecchi
- Department of Experimental and Clinical Biomedical Sciences, Section of Biochemistry, University of Florence, Florence, Italy
| |
Collapse
|
46
|
Nie S, Ge Y. The link between the gut microbiome, inflammation, and Parkinson's disease. Appl Microbiol Biotechnol 2023; 107:6737-6749. [PMID: 37736791 DOI: 10.1007/s00253-023-12789-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/04/2023] [Accepted: 09/11/2023] [Indexed: 09/23/2023]
Abstract
As our society ages, the growing number of people with Parkinson's disease (PD) puts tremendous pressure on our society. Currently, there is no effective treatment for PD, so there is an urgent need to find new treatment options. In recent years, increasing studies have shown a strong link between gut microbes and PD. In this review, recent advances in research on gut microbes in PD patients were summarized. Increased potential pro-inflammatory microbes and decreased potential anti-inflammatory microbes are prominent features of gut microbiota in PD patients. These changes may lead to an increase in pro-inflammatory substances (such as lipopolysaccharide and H2S) and a decrease in anti-inflammatory substances (such as short-chain fatty acids) to promote inflammation in the gut. This gut microbiota-mediated inflammation will lead to pathological α-synuclein accumulation in the gut, and the inflammation and α-synuclein can spread to the brain via the microbiota-gut-brain axis, thereby promoting neuroinflammation, apoptosis of dopaminergic neurons, and ultimately the development of PD. This review also showed that therapies based on gut microbiota may have a bright future for PD. However, more research and new approaches are still needed to clarify the causal relationship between gut microbes and PD and to determine whether therapies based on gut microbiota are effective in PD patients. KEY POINTS: • There is a strong association between gut microbes and PD. • Inflammation mediated by gut microbes may promote the development of PD. • Therapies based on the gut microbiome provide a promising strategy for PD prevention.
Collapse
Affiliation(s)
- Shiqing Nie
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuan Ge
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing, 100085, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
47
|
Mackie PM, Koshy J, Bhogade M, Hammoor T, Hachmeister W, Lloyd GM, Paterno G, Bolen M, Tansey MG, Giasson BI, Khoshbouei H. Complement C1q-dependent engulfment of alpha-synuclein induces ENS-resident macrophage exhaustion and accelerates Parkinson's-like gut pathology. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.24.563832. [PMID: 37961460 PMCID: PMC10634831 DOI: 10.1101/2023.10.24.563832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Deposition of misfolded α-synuclein (αsyn) in the enteric nervous system (ENS) is found in multiple neurodegenerative diseases. It is hypothesized that ENS synucleinopathy contributes to both the pathogenesis and non-motor morbidity in Parkinson's Disease (PD), but the cellular and molecular mechanisms that shape enteric histopathology and dysfunction are poorly understood. Here, we demonstrate that ENS-resident macrophages, which play a critical role in maintaining ENS homeostasis, initially respond to enteric neuronal αsyn pathology by upregulating machinery for complement-mediated engulfment. Pharmacologic depletion of ENS-macrophages or genetic deletion of C1q enhanced enteric neuropathology. Conversely, C1q deletion ameliorated gut dysfunction, indicating that complement partially mediates αsyn-induced gut dysfunction. Internalization of αsyn led to increased endo-lysosomal stress that resulted in macrophage exhaustion and temporally correlated with the progression of ENS pathology. These novel findings highlight the importance of enteric neuron-macrophage interactions in removing toxic protein aggregates that putatively shape the earliest stages of PD in the periphery.
Collapse
Affiliation(s)
- P M Mackie
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| | - J Koshy
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| | - M Bhogade
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| | - T Hammoor
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| | - W Hachmeister
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| | - G M Lloyd
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine. Gainesville, FL, 32610
| | - G Paterno
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine. Gainesville, FL, 32610
| | - M Bolen
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine. Gainesville, FL, 32610
| | - M G Tansey
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine. Gainesville, FL, 32610
- Department of Neurology and Fixel Institute for Neurological Diseases, University of Florida Health, Gainesville, Florida, 32610
| | - B I Giasson
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
- Center for Translational Research in Neurodegenerative Disease, University of Florida College of Medicine. Gainesville, FL, 32610
| | - H Khoshbouei
- Department of Neuroscience, University of Florida College of Medicine. Gainesville, FL, 32610
| |
Collapse
|
48
|
Craig CF, Finkelstein DI, McQuade RM, Diwakarla S. Understanding the potential causes of gastrointestinal dysfunctions in multiple system atrophy. Neurobiol Dis 2023; 187:106296. [PMID: 37714308 DOI: 10.1016/j.nbd.2023.106296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/17/2023] Open
Abstract
Multiple system atrophy (MSA) is a rare, progressive neurodegenerative disorder characterised by autonomic, pyramidal, parkinsonian and/or cerebellar dysfunction. Autonomic symptoms of MSA include deficits associated with the gastrointestinal (GI) system, such as difficulty swallowing, abdominal pain and bloating, nausea, delayed gastric emptying, and constipation. To date, studies assessing GI dysfunctions in MSA have primarily focused on alterations of the gut microbiome, however growing evidence indicates other structural components of the GI tract, such as the enteric nervous system, the intestinal barrier, GI hormones, and the GI-driven immune response may contribute to MSA-related GI symptoms. Here, we provide an in-depth exploration of the physiological, structural, and immunological changes theorised to underpin GI dysfunction in MSA patients and highlight areas for future research in order to identify more suitable pharmaceutical treatments for GI symptoms in patients with MSA.
Collapse
Affiliation(s)
- Colin F Craig
- Gut Barrier and Disease Laboratory, Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC 3010, Australia
| | - David I Finkelstein
- Parkinson's Disease Laboratory, The Florey Institute of Neuroscience and Mental Health, Parkville, VIC 3052, Australia
| | - Rachel M McQuade
- Gut Barrier and Disease Laboratory, Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC 3010, Australia; Australian Institute for Musculoskeletal Science (AIMSS), Western Centre for Health Research and Education (WCHRE), Sunshine Hospital, St Albans, VIC 3021, Australia
| | - Shanti Diwakarla
- Gut Barrier and Disease Laboratory, Department of Anatomy & Physiology, The University of Melbourne, Parkville, VIC 3010, Australia; Australian Institute for Musculoskeletal Science (AIMSS), Western Centre for Health Research and Education (WCHRE), Sunshine Hospital, St Albans, VIC 3021, Australia.
| |
Collapse
|
49
|
Chandra R, Sokratian A, Chavez KR, King S, Swain SM, Snyder JC, West AB, Liddle RA. Gut mucosal cells transfer α-synuclein to the vagus nerve. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.14.553305. [PMID: 37645945 PMCID: PMC10461984 DOI: 10.1101/2023.08.14.553305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Epidemiological and histopathological findings have raised the possibility that misfolded α-synuclein protein might spread from the gut to the brain and increase the risk of Parkinson's disease (PD). While past experimental studies in mouse models have relied on gut injections of exogenous recombinant α-synuclein fibrils to study gut to brain α-synuclein transfer, the possible origins of misfolded α-synuclein within the gut have remained elusive. We recently demonstrated that sensory cells of the gut mucosa express α-synuclein. In this study, we employed mouse intestinal organoids expressing human α-synuclein to observe the transfer of α-synuclein protein from gut epithelial cells in organoids co-cultured with vagal nodose neurons that are otherwise devoid of α-synuclein expression. In intact mice that express pathological human α-synuclein, but no mouse α-synuclein, α-synuclein fibril templating activity emerges in α-synuclein seeded fibril aggregation assays in tissues from the gut, vagus nerve, and dorsal motor nucleus. In newly engineered transgenic mice that restrict pathological human α-synuclein expression to intestinal epithelial cells, α-synuclein fibril-templating activity transfers to the vagus nerve and to the dorsal motor nucleus. Subdiaphragmatic vagotomy prior to the induction of α-synuclein expression in the gut epithelial cells effectively protects the hindbrain from the emergence of α-synuclein fibril templating activity. Overall, these findings highlight a novel potential non-neuronal source of fibrillar α-synuclein protein that might arise in gut mucosal cells.
Collapse
|
50
|
Muhammad B, Li H, Gu Y, Xue S, Gao Y, Xu Z, Fang X, Ding H, Wu F, Geng D, Niu H. IL-1β/IL-1R1 signaling is involved in the propagation of α-synuclein pathology of the gastrointestinal tract to the brain. J Neurochem 2023; 166:830-846. [PMID: 37434423 DOI: 10.1111/jnc.15886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 06/03/2023] [Accepted: 06/07/2023] [Indexed: 07/13/2023]
Abstract
The pathological hallmark of Parkinson's disease (PD) is the intraneuronal accumulation of misfolded alpha-synuclein (termed Lewy bodies) in dopaminergic neurons of substantia nigra par compacta (SNc). It is assumed that the α-syn pathology is induced by gastrointestinal inflammation and then transfers to the brain by the gut-brain axis. Therefore, the relationship between gastrointestinal inflammation and α-syn pathology leading to PD remains to be investigated. In our study, rotenone (ROT) oral administration induces gastrointestinal tract (GIT) inflammation in mice. In addition, we used pseudorabies virus (PRV) for tracing studies and performed behavioral testing. We observed that ROT treatments enhance macrophage activation, inflammatory mediator expression, and α-syn pathology in the GIT 6-week post-treatment (P6). Moreover, pathological α-syn was localized with IL-1R1 positive neural cells in GIT. In line with these findings, we also find pS129-α-syn signals in the dorsal motor nucleus of the vagus (DMV) and tyrosine hydroxylase in the nigral-striatum dynamically change from 3-week post-treatment (P3) to P6. Following that, pS129-α-syn was dominant in the enteric neural cell, DMV, and SNc, accompanied by microglial activation, and these phenotypes were absent in IL-1R1r/r mice. These data suggest that IL-1β/IL-1R1-dependent inflammation of GIT can induce α-syn pathology, which then propagates to the DMV and SNc, resulting in PD.
Collapse
Affiliation(s)
- Bilal Muhammad
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Haiying Li
- Department of Pathology, Xuzhou Medical University, Xuzhou, China
| | - Yunlu Gu
- Department of Neuroscience, Xuzhou Medical University, Xuzhou, China
| | - Senlin Xue
- Department of Post-Graduation, Xuzhou Medical University, Xuzhou, China
| | - Yao Gao
- Department of Post-Graduation, Xuzhou Medical University, Xuzhou, China
| | - Zhou Xu
- Department of Post-Graduation, Xuzhou Medical University, Xuzhou, China
| | - Xiaoli Fang
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Haohan Ding
- Department of Neuroscience, Xuzhou Medical University, Xuzhou, China
| | - Fang Wu
- Department of Neuroscience, Xuzhou Medical University, Xuzhou, China
| | - Deqin Geng
- Department of Neurology, Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Haichen Niu
- Department of Genetics, Xuzhou Medical University, Xuzhou, China
- Public Experimental Research Center of Xuzhou Medical University, Xuzhou, China
| |
Collapse
|