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Vivacqua G, Mancinelli R, Leone S, Vaccaro R, Garro L, Carotti S, Ceci L, Onori P, Pannarale L, Franchitto A, Gaudio E, Casini A. Endoplasmic reticulum stress: A possible connection between intestinal inflammation and neurodegenerative disorders. Neurogastroenterol Motil 2024; 36:e14780. [PMID: 38462652 DOI: 10.1111/nmo.14780] [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: 07/04/2023] [Revised: 01/27/2024] [Accepted: 03/03/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND Different studies have shown the key role of endoplasmic reticulum (ER) stress in autoimmune and chronic inflammatory disorders, as well as in neurodegenerative diseases. ER stress leads to the formation of misfolded proteins which affect the secretion of different cell types that are crucial for the intestinal homeostasis. PURPOSE In this review, we discuss the role of ER stress and its involvement in the development of inflammatory bowel diseases, chronic conditions that can cause severe damage of the gastrointestinal tract, focusing on the alteration of Paneth cells and goblet cells (the principal secretory phenotypes of the intestinal epithelial cells). ER stress is also discussed in the context of neurodegenerative diseases, in which protein misfolding represents the signature mechanism. ER stress in the bowel and consequent accumulation of misfolded proteins might represent a bridge between bowel inflammation and neurodegeneration along the gut-to-brain axis, affecting intestinal epithelial homeostasis and the equilibrium of the commensal microbiota. Targeting intestinal ER stress could foster future studies for designing new biomarkers and new therapeutic approaches for neurodegenerative disorders.
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Affiliation(s)
- Giorgio Vivacqua
- Integrated Research Center (PRAAB), Campus Biomedico University of Roma, Rome, Italy
| | - Romina Mancinelli
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Stefano Leone
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Rosa Vaccaro
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Ludovica Garro
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Simone Carotti
- Integrated Research Center (PRAAB), Campus Biomedico University of Roma, Rome, Italy
| | - Ludovica Ceci
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Paolo Onori
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Luigi Pannarale
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Antonio Franchitto
- Division of Health Sciences, Department of Movement, Human and Health Sciences, University of Rome 'Foro Italico', Rome, Italy
| | - Eugenio Gaudio
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
| | - Arianna Casini
- Department of Anatomical, Histological, Forensic Medicine and Orthopedic Sciences, Sapienza University of Rome, Rome, Italy
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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.
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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.)
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Fasciani I, Petragnano F, Bono F, Aloisi G, Mutti V, Pardini C, Carli M, Scarselli M, Vaglini F, Angelucci A, Fiorentini C, Lozzi L, Missale C, Maggio R, Rossi M. In-vitro Approaches to Investigate the Detrimental Effect of Light on Dopaminergic Neurons. Neuroscience 2024; 544:104-116. [PMID: 38244669 DOI: 10.1016/j.neuroscience.2024.01.009] [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: 09/23/2023] [Revised: 01/08/2024] [Accepted: 01/11/2024] [Indexed: 01/22/2024]
Abstract
Our recent study revealed that fluorescent lamp light can penetrate deep into the brain of mice and rats leading to the development of typical histological characteristics associated with Parkinson's disease such as the loss of dopamine neurons in the substantia nigra. Monochromatic LED lights were thus used in this work to deepen our knowledge on the effects of the major wavelength peaks of fluorescent light on mouse and human dopaminergic cells. In particular, we exposed immortalized dopaminergic MN9D neuronal cells, primary cultures of mouse mesencephalic dopaminergic cells and human dopaminergic neurons differentiated from induced pluripotent stem cells (hiPSC) to different LED light wavelengths. We found that chronic exposure to LED light reduced overall undifferentiated MN9D cell number, with the most significant effects observed at wavelengths of 485 nm and 610 nm. Moreover, LED light especially at 610 nm was able to negatively impact on the survival of mouse mesencephalic dopaminergic cells and of human dopaminergic neurons derived from hiPSC. Notably, differentiated MN9D dopaminergic cells, which closely resemble mature dopamine neuronal phenotype, acutely exposed for 3 h at 610 nm, showed a clear increase in ROS production and cytotoxicity compared to controls undifferentiated MN9D cells. These increases were even more pronounced by the co-treatment with the oxidative agent H2O2. Collectively, these findings suggest that specific wavelengths, particularly those capable of penetrating deep into the brain, could potentially pose an environmental hazard in relation to Parkinson's disease.
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Affiliation(s)
- Irene Fasciani
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Francesco Petragnano
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Federica Bono
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Gabriella Aloisi
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Veronica Mutti
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Carla Pardini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Marco Carli
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Marco Scarselli
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Francesca Vaglini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Adriano Angelucci
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Chiara Fiorentini
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Luca Lozzi
- Department of Physical and Chemical Science, University of L'Aquila, via Vetoio, Coppito, 67100 L'Aquila, Italy
| | - Cristina Missale
- Section of Pharmacology, Department of Molecular and Translational Medicine, University of Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Roberto Maggio
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Mario Rossi
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy.
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Wang Z, Xia H, Feng T, Aibibuli A, Zhang M, Yang X. The role of HLA-DR on plasmacytoid dendritic cells in mediating the effects of Butyrivibrio gut microbiota on Parkinson's disease. Neurol Sci 2024:10.1007/s10072-024-07467-y. [PMID: 38499889 DOI: 10.1007/s10072-024-07467-y] [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: 01/30/2024] [Accepted: 03/12/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND Parkinson's disease (PD) is viewed as a progressively deteriorating neurodegenerative disorder, the exact etiology of which remains not fully deciphered to this date. The gut microbiota could play a crucial role in PD development by modulating the human immune system. OBJECTIVE This study aims to explore the relationship between gut microbiota and PD, focusing on how immune characteristics may both directly and indirectly influence their interaction. METHODS Utilizing cumulative data from genome-wide association studies (GWAS), our research conducted a two-sample Mendelian randomization (MR) analysis to clarify the association between the gut microbiome and PD. Additionally, by employing a two-step MR approach, we assessed the impact of gut microbiota on PD development via immune characteristics and quantified HLA-DR mediation effect on plasmacytoid dendritic cells (pDCs). RESULTS We discovered significant associations between PD and microbiota, comprising one class, one order, two families, and two genera. Furthermore, we explored the extent to which HLA-DR on pDCs mediates the effect of Butyrivibrio gut microbiota on PD. CONCLUSION Our study emphasizes the complex interactions between the gut microbiota, immune characteristics, and PD. The relationships and intermediary roles identified in our research provide important insights for developing potential therapies that target the gut microbiome to alleviate symptoms in PD patients.
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Affiliation(s)
- Zihao Wang
- Key Laboratory of the Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Huan Xia
- Key Laboratory of the Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Tingting Feng
- Key Laboratory of the Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Adilai Aibibuli
- Key Laboratory of the Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Mingyang Zhang
- Key Laboratory of the Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China
| | - Xinling Yang
- Department of Neurology, Second Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang, China.
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Tóth Š, Kulcsárová K, Maretta M, Kunová A, Mechírová E, Gdovinová Z, Feketeová E, Ribeiro Ventosa J, Baloghová J, Bekeová M, Christová P, Mrázová S, Muránska S, Zeidan D, Škorvánek M. α-synuclein antibody 5G4 identifies idiopathic REM-sleep behavior disorder in abdominal skin biopsies. Parkinsonism Relat Disord 2024; 120:105956. [PMID: 38217955 DOI: 10.1016/j.parkreldis.2023.105956] [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: 08/15/2023] [Revised: 11/25/2023] [Accepted: 12/06/2023] [Indexed: 01/15/2024]
Abstract
INTRODUCTION Idiopathic REM-sleep behavior disorder (iRBD) is considered the most specific prodromal marker of Parkinson's disease (PD). With the need to improve early detection of prodromal α-synucleinopathies, several methods to identify peripheral α-synuclein (α-syn) pathology have been exploited in manifest and prodromal PD with varying diagnostic accuracy. Recently, a disease specific 5G4 antibody has been evaluated in skin biopsies of manifest PD patients. The aim of our study was to analyze the 5G4 α-syn immunoreactivity in skin biopsies of deeply phenotyped subjects with iRBD and controls. METHODS The study cohort consisted of 28 patients with PD, 24 subjects with iRBD and 27 healthy controls, recruited from the CEGEMOD, PDBIOM and PARCAS cohorts. All subjects were deeply phenotyped and assessed for prodromal PD (pPD) probability based on MDS research criteria. Abdominal skin punch biopsies were processed and stained using a conformation specific 5G4 α-syn antibody as well as axonal markers SMI-31 and S100. RESULTS 5G4-positivity was identified in 23/28 PD patients, 20/24 iRBD subjects and 8/27 healthy controls. Compared to healthy controls, sensitivity and specificity reached 83.33 % and 70.37 % for iRBD; and 82.14 % and 70.37 % for PD, respectively. 5G4-positivity rate in our study was irrespective of the calculated pPD probability of iRBD subjects. CONCLUSIONS This work establishes the diagnostic yield of conformation specific 5G4 α-syn antibody testing in skin biopsies of subjects with pPD, specifically iRBD. The diagnostic accuracy for this method seems to be similar for both manifest and prodromal PD and is not dependent on the pPD probability ratios.
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Affiliation(s)
- Štefan Tóth
- Department of Histology and Embryology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic.
| | - Kristína Kulcsárová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic; Department of Clinical Neurosciences, University Scientific Park MEDIPARK, P. J. Šafárik University, Kosice, Slovak Republic
| | - Milan Maretta
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic
| | - Alexandra Kunová
- Department of Histology and Embryology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Eva Mechírová
- Department of Histology and Embryology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Zuzana Gdovinová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic
| | - Eva Feketeová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic
| | - Joaquim Ribeiro Ventosa
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic; Department of Clinical Neurosciences, University Scientific Park MEDIPARK, P. J. Šafárik University, Kosice, Slovak Republic
| | - Janette Baloghová
- Department of Dermatovenerology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Dermatovenerology, University Hospital of L. Pasteur, Košice, Slovak Republic
| | - Martina Bekeová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Petronela Christová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Soňa Mrázová
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Soňa Muránska
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Dema Zeidan
- Department of Histology and Embryology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic
| | - Matej Škorvánek
- Department of Neurology, Medical Faculty of P. J. Šafárik University, Košice, Slovak Republic; Department of Neurology, University Hospital of L. Pasteur, Košice, Slovak Republic
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Montalbán-Rodríguez A, Abalo R, López-Gómez L. From the Gut to the Brain: The Role of Enteric Glial Cells and Their Involvement in the Pathogenesis of Parkinson's Disease. Int J Mol Sci 2024; 25:1294. [PMID: 38279293 PMCID: PMC10816228 DOI: 10.3390/ijms25021294] [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: 11/30/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 01/28/2024] Open
Abstract
The brain-gut axis has been identified as an important contributor to the physiopathology of Parkinson's disease. In this pathology, inflammation is thought to be driven by the damage caused by aggregation of α-synuclein in the brain. Interestingly, the Braak's theory proposes that α-synuclein misfolding may originate in the gut and spread in a "prion-like" manner through the vagus nerve into the central nervous system. In the enteric nervous system, enteric glial cells are the most abundant cellular component. Several studies have evaluated their role in Parkinson's disease. Using samples obtained from patients, cell cultures, or animal models, the studies with specific antibodies to label enteric glial cells (GFAP, Sox-10, and S100β) seem to indicate that activation and reactive gliosis are associated to the neurodegeneration produced by Parkinson's disease in the enteric nervous system. Of interest, Toll-like receptors, which are expressed on enteric glial cells, participate in the triggering of immune/inflammatory responses, in the maintenance of intestinal barrier integrity and in the configuration of gut microbiota; thus, these receptors might contribute to Parkinson's disease. External factors like stress also seem to be relevant in its pathogenesis. Some authors have studied ways to reverse changes in EGCs with interventions such as administration of Tryptophan-2,3-dioxygenase inhibitors, nutraceuticals, or physical exercise. Some researchers point out that beyond being activated during the disease, enteric glial cells may contribute to the development of synucleinopathies. Thus, it is still necessary to further study these cells and their role in Parkinson's disease.
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Affiliation(s)
- Alba Montalbán-Rodríguez
- Department of Basic Health Sciences, Faculty of Health Sciences, University Rey Juan Carlos (URJC), 28922 Alcorcon, Spain; (A.M.-R.); (L.L.-G.)
- High Performance Research Group in Physiopathology and Pharmacology of the Digestive System (NeuGut-URJC), University Rey Juan Carlos (URJC), 28922 Alcorcón, Spain
| | - Raquel Abalo
- Department of Basic Health Sciences, Faculty of Health Sciences, University Rey Juan Carlos (URJC), 28922 Alcorcon, Spain; (A.M.-R.); (L.L.-G.)
- High Performance Research Group in Physiopathology and Pharmacology of the Digestive System (NeuGut-URJC), University Rey Juan Carlos (URJC), 28922 Alcorcón, Spain
- Associated R+D+i Unit to the Institute of Medicinal Chemistry (IQM), Scientific Research Superior Council (CSIC), 28006 Madrid, Spain
- Working Group of Basic Sciences on Pain and Analgesia, Spanish Pain Society, 28046 Madrid, Spain
- Working Group of Basic Sciences on Cannabinoids, Spanish Pain Society, 28046 Madrid, Spain
| | - Laura López-Gómez
- Department of Basic Health Sciences, Faculty of Health Sciences, University Rey Juan Carlos (URJC), 28922 Alcorcon, Spain; (A.M.-R.); (L.L.-G.)
- High Performance Research Group in Physiopathology and Pharmacology of the Digestive System (NeuGut-URJC), University Rey Juan Carlos (URJC), 28922 Alcorcón, Spain
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Carrer T, Bonato G, Sandre M, Emmi A, Campagnolo M, Musso G, Carecchio M, Parchi P, Antonini A. Rapidly progressive multiple system atrophy in a patient carrying LRRK2 G2019S mutation. Neurol Sci 2024; 45:309-313. [PMID: 37752324 DOI: 10.1007/s10072-023-07056-5] [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: 06/02/2023] [Accepted: 09/02/2023] [Indexed: 09/28/2023]
Abstract
BACKGROUND Multiple system atrophy (MSA) is considered a primarily sporadic neurodegenerative disease, but the role of genetic is poorly understood. CASE We present a female patient of Moroccan origin who developed a rapidly progressive non-levodopa responsive parkinsonism, gait and balance problems, and dysautonomia including severe bulbar symptoms. She was diagnosed with MSA Parkinsonian-type (MSA-P) and suddenly died at night at 58 years of age. Reduced striatal DAT-SPECT, putaminal hyperintensity on T2-MRI, and hypometabolism with FDG-PET were present. Genetic testing documented a G2019S mutation in the LRRK2 gene. A skin biopsy was obtained and used to perform alpha-synuclein RT-QuIC, which was negative, and immunohistochemical analysis, which demonstrated abnormal alpha-synuclein deposits in cutaneous nerves. Elevated blood neurofilament light chain levels were also documented. CONCLUSIONS LRRK2 mutations are the most common cause of monogenic Parkinson's disease (PD) and G2019S is the most frequent variant. Our patient presented with biological, clinical, and radiological features of MSA, but genetic testing revealed a G2019S LRRK2 mutation, which has been previously reported only in one other case of pathologically proven MSA but with mild progression. In our patient, post-mortem confirmation could not be performed, but RT-QuIC and immunohistochemical findings on skin biopsy support the diagnosis of MSA. G2019S LRRK2 may be linked to an increased risk of MSA. Cases of atypical parkinsonism with rapid disease course should be screened for PD-related genes especially in populations with a high prevalence of mutations in known genes.
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Affiliation(s)
- Tommaso Carrer
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Giulia Bonato
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Michele Sandre
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Aron Emmi
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Marta Campagnolo
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Giulia Musso
- Department of Medicine (DIMED), University of Padua, Padua, Italy
| | - Miryam Carecchio
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy
| | - Piero Parchi
- Department of Biomedical and Neuromotor Sciences (DiBiNeM), University of Bologna, Bologna, Italy
- Programma Neuropatologia Delle Malattie Neurodegenerative, Istituto Delle Scienze Neurologiche Di Bologna, IRCCS, Bologna, Italy
| | - Angelo Antonini
- Parkinson and Movement Disorders Unit, Center for Rare Neurological Diseases (ERN-RND), Study Center On Neurodegeneration (CESNE), Department of Neuroscience, University of Padua, Via Giustiniani 2, 35128, Padua, Italy.
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8
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Nigro I, Miglionico R, Carmosino M, Gerbino A, Masato A, Sandre M, Bubacco L, Antonini A, Rinaldi R, Bisaccia F, Armentano MF. Neuroprotective Effect of Antiapoptotic URG7 Protein on Human Neuroblastoma Cell Line SH-SY5Y. Int J Mol Sci 2023; 25:481. [PMID: 38203652 PMCID: PMC10779352 DOI: 10.3390/ijms25010481] [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: 12/07/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Up-regulated Gene clone 7 (URG7) is a protein localized in the endoplasmic reticulum (ER) and overexpressed in liver cells upon hepatitis B virus (HBV) infection. Its activity has been related to the attenuation of ER stress resulting from HBV infection, promoting protein folding and ubiquitination and reducing cell apoptosis overall. While the antiapoptotic activity of URG7 in HBV-infected cells may have negative implications, this effect could be exploited positively in the field of proteinopathies, such as neurodegenerative diseases. In this work, we aimed to verify the possible contribution of URG7 as a reliever of cellular proteostasis alterations in a neuronal in vitro system. Following tunicamycin-induced ER stress, URG7 was shown to modulate different markers of the unfolded protein response (UPR) in favor of cell survival, mitigating ER stress and activating autophagy. Furthermore, URG7 promoted ubiquitination, and determined a reduction in protein aggregation, calcium release from the ER and intracellular ROS content, confirming its pro-survival activity. Therefore, in light of the results reported in this work, we hypothesize that URG7 offers activity as an ER stress reliever in a neuronal in vitro model, and we paved the way for a new approach in the treatment of neurodegenerative diseases.
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Affiliation(s)
- Ilaria Nigro
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
| | - Rocchina Miglionico
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
| | - Monica Carmosino
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
| | - Andrea Gerbino
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Via Orabona, 4, 70125 Bari, Italy;
| | - Anna Masato
- Department of Biology, University of Padova, Via U. Bassi, 58/B, 35121 Padova, Italy; (A.M.); (L.B.)
- UK Dementia Research Institute at UCL, University College London, Tottenham Ct Rd, London W1T 7NF, UK
| | - Michele Sandre
- Department of Neurosciences, University of Padova, Via Belzoni, 160, 35121 Padova, Italy; (M.S.); (A.A.)
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35121 Padova, Italy
| | - Luigi Bubacco
- Department of Biology, University of Padova, Via U. Bassi, 58/B, 35121 Padova, Italy; (A.M.); (L.B.)
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35121 Padova, Italy
| | - Angelo Antonini
- Department of Neurosciences, University of Padova, Via Belzoni, 160, 35121 Padova, Italy; (M.S.); (A.A.)
- Centro Studi per la Neurodegenerazione (CESNE), University of Padova, 35121 Padova, Italy
| | - Roberta Rinaldi
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
| | - Faustino Bisaccia
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
| | - Maria Francesca Armentano
- Department of Science, University of Basilicata, Viale dell’Ateneo Lucano, 10, 85100 Potenza, Italy; (I.N.); (R.M.); (M.C.); (R.R.); (F.B.)
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9
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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.
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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.
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10
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Danics K, Visanji NP, Ichimata S, Mathur S, Sára-Klausz G, Kovacs GG. Prevalence and Distribution of Lewy Pathology in a Homeless Population. Can J Neurol Sci 2023:1-7. [PMID: 37793895 DOI: 10.1017/cjn.2023.291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
BACKGROUND The homeless population experience significant inequalities in health, and there is an increasing appreciation of the potential of lifestyle factors in the development of neurodegenerative diseases, including Parkinson's disease. We performed a study on the prevalence and distribution of pathological alpha-synuclein deposition throughout the central and peripheral nervous systems in a homeless population. METHODS Forty-four homeless individuals consecutively available for autopsy were recruited. Immunohistochemistry was performed using 5G4 antibody recognizing disease-associated forms of alpha-synuclein, complemented by phospho-synuclein antibody on autopsy tissues collected from 18 regions of the brain and spinal cord, as well as the right and left olfactory bulb, the cauda equina, the extramedullary portion of the vagus nerve, and 27 sites of peripheral organs. RESULTS The study cohort consisted of 38 males and 6 females, median age 58 years (range 32-67). Lewy-related pathology was present in the brains of three male cases. One showed Braak stage 2 (60 years old), and two stage 4 (56 and 59 years old). One of the Braak stage 4 cases had Lewy-related pathology in the spinal cord, the cauda equina, and the extramedullary portion of the vagus nerve. Examination of 27 sites of peripheral organs found that all three cases with Lewy-related pathology present in the brain were devoid of peripheral organ alpha-synuclein pathology. Multiple system-type alpha-synuclein pathology was not found. CONCLUSION Our study, representing a snapshot of the homeless population that came to autopsy, suggests that alpha-synuclein pathology is prevalent in the homeless supporting further study of this vulnerable population.
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Affiliation(s)
- Krisztina Danics
- Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary
| | - Naomi P Visanji
- Tanz Centre for Research in Neurodegenerative Disease, University of Toronto, Toronto, ON, Canada
- Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
| | - Shojiro Ichimata
- Tanz Centre for Research in Neurodegenerative Disease, University of Toronto, Toronto, ON, Canada
| | - Sarika Mathur
- Tanz Centre for Research in Neurodegenerative Disease, University of Toronto, Toronto, ON, Canada
| | - Gabriella Sára-Klausz
- Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary
| | - Gabor G Kovacs
- Tanz Centre for Research in Neurodegenerative Disease, University of Toronto, Toronto, ON, Canada
- Edmond J. Safra Program in Parkinson's Disease and the Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, Toronto, ON, Canada
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Krembil Brain Institute, University Health Network, Toronto, ON, Canada
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11
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Campagnolo M, Emmi A, Biundo R, Fiorenzato E, Batzu L, Chaudhuri KR, Antonini A. The pharmacological management of the behavioral aspects of Parkinson's disease: an update. Expert Opin Pharmacother 2023; 24:1693-1701. [PMID: 37493445 DOI: 10.1080/14656566.2023.2240228] [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: 05/28/2023] [Accepted: 07/20/2023] [Indexed: 07/27/2023]
Abstract
INTRODUCTION Behavioural symptoms are common manifestations of Parkinson's disease and include depression, anxiety, impulse control disorders, hallucinations, psychosis, and cognitive dysfunction. They remain inadequately addressed in many patients despite their relevance for quality of life and disability. This applies also to impulse control disorders where the most common approach in recent literature is to refrain from using dopamine agonists without consideration about their potential benefit on motor complications. AREAS COVERED We conducted a narrative review searching for articles on behavioral symptoms in Parkinson disease and selected those which included involved neurotransmitters such as dopamine, noradrenaline, serotonin, acetylcholine. We specifically focused our search on open-label and randomized double-blind studies and biomarkers which could best characterize these clinical manifestations. EXPERT OPINION Management of Parkinson disease behavioural manifestations lacks clear guidelines and standardized protocols beside general suggestions of dose adjustments in dopamine replacement therapy and use of antidepressants or antipsychotic drugs with little consideration of patients' age, sex, comorbidities, and motor status. We suggest a pragmatic approach which includes education of affected patients and caring people, dealing with complex cases by experienced multidisciplinary teams, use of cognitive behavioural therapy, and psychological counselling to complement drug treatment.
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Affiliation(s)
- Marta Campagnolo
- Parkinson's Disease and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN-RND), Department of Neuroscience, University of Padova, Padova, Italy
- Center for Neurodegenerative Disease Research (CESNE), Department of Neuroscience, University of Padova, Padova, Italy
| | - Aron Emmi
- Center for Neurodegenerative Disease Research (CESNE), Department of Neuroscience, University of Padova, Padova, Italy
- Institute of Human Anatomy, Department of Neuroscience, University of Padova, Padova, Italy
| | - Roberta Biundo
- Parkinson's Disease and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN-RND), Department of Neuroscience, University of Padova, Padova, Italy
- Center for Neurodegenerative Disease Research (CESNE), Department of Neuroscience, University of Padova, Padova, Italy
- Department of General Psychology, University of Padova, Padova, Italy
| | - Eleonora Fiorenzato
- Parkinson's Disease and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN-RND), Department of Neuroscience, University of Padova, Padova, Italy
| | - Lucia Batzu
- Department of Basic and Clinical Neurosciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- Parkinson's Foundation Centre of Excellence, King's College Hospital, London, UK
| | - K Ray Chaudhuri
- Department of Basic and Clinical Neurosciences, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK
- Parkinson's Foundation Centre of Excellence, King's College Hospital, London, UK
| | - Angelo Antonini
- Parkinson's Disease and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN-RND), Department of Neuroscience, University of Padova, Padova, Italy
- Center for Neurodegenerative Disease Research (CESNE), Department of Neuroscience, University of Padova, Padova, Italy
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12
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Jiménez-Jiménez FJ, Alonso-Navarro H, García-Martín E, Santos-García D, Martínez-Valbuena I, Agúndez JAG. Alpha-Synuclein in Peripheral Tissues as a Possible Marker for Neurological Diseases and Other Medical Conditions. Biomolecules 2023; 13:1263. [PMID: 37627328 PMCID: PMC10452242 DOI: 10.3390/biom13081263] [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: 07/21/2023] [Revised: 08/11/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023] Open
Abstract
The possible usefulness of alpha-synuclein (aSyn) determinations in peripheral tissues (blood cells, salivary gland biopsies, olfactory mucosa, digestive tract, skin) and in biological fluids, except for cerebrospinal fluid (serum, plasma, saliva, feces, urine), as a marker of several diseases, has been the subject of numerous publications. This narrative review summarizes data from studies trying to determine the role of total, oligomeric, and phosphorylated aSyn determinations as a marker of various diseases, especially PD and other alpha-synucleinopathies. In summary, the results of studies addressing the determinations of aSyn in its different forms in peripheral tissues (especially in platelets, skin, and digestive tract, but also salivary glands and olfactory mucosa), in combination with other potential biomarkers, could be a useful tool to discriminate PD from controls and from other causes of parkinsonisms, including synucleinopathies.
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Affiliation(s)
| | | | - Elena García-Martín
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10071 Cáceres, Spain; (E.G.-M.); (J.A.G.A.)
| | - Diego Santos-García
- Department of Neurology, CHUAC—Complejo Hospitalario Universitario de A Coruña, 15006 A Coruña, Spain;
| | - Iván Martínez-Valbuena
- Tanz Centre for Research in Neurodegenerative Diseases, University of Toronto, Toronto, ON M5T 2S8, Canada;
| | - José A. G. Agúndez
- Institute of Molecular Pathology Biomarkers, Universidad de Extremadura, 10071 Cáceres, Spain; (E.G.-M.); (J.A.G.A.)
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13
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Antonini A, Emmi A, Campagnolo M. Beyond the Dopaminergic System: Lessons Learned from levodopa Resistant Symptoms in Parkinson's Disease. Mov Disord Clin Pract 2023; 10:S50-S55. [PMID: 37637981 PMCID: PMC10448140 DOI: 10.1002/mdc3.13786] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 08/29/2023] Open
Affiliation(s)
- Angelo Antonini
- Parkinson and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN‐RND), Department of NeuroscienceUniversity of PadovaPadovaItaly
- Center for Neurodegenerative Diseases (CESNE)University of PadovaPadovaItaly
| | - Aron Emmi
- Center for Neurodegenerative Diseases (CESNE)University of PadovaPadovaItaly
- Institute of Human Anatomy, Department of NeuroscienceUniversity of PadovaPadovaItaly
| | - Marta Campagnolo
- Parkinson and Movement Disorders Unit, Centre for Rare Neurological Diseases (ERN‐RND), Department of NeuroscienceUniversity of PadovaPadovaItaly
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14
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Huang P, Zhang P, Du J, Gao C, Liu J, Tan Y, Chen S. Association of fecal short-chain fatty acids with clinical severity and gut microbiota in essential tremor and its difference from Parkinson's disease. NPJ Parkinsons Dis 2023; 9:115. [PMID: 37460569 DOI: 10.1038/s41531-023-00554-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 06/26/2023] [Indexed: 07/20/2023] Open
Abstract
Diagnosis of essential tremor (ET) at an early stage can be difficult, especially when distinguishing it from healthy controls (HCs) and Parkinson's disease (PD). Recently, stool sample analysis of gut microbiota and its metabolites provides new ways to detect novel biomarkers for neurodegenerative diseases. Short-chain fatty acids (SCFAs), as the main metabolites of gut microbiota, were reduced in the feces of PD. However, fecal SCFAs in ET have never been investigated. We aimed to investigate the fecal SCFA levels in ET, assess their relationships with clinical symptoms and gut microbiota, and identify their potential diagnostic abilities. Fecal SCFAs and gut microbiota in 37 ET, 37 de novo PD and 35 HC were measured. Constipation, autonomic dysfunction and tremor severity were evaluated by scales. ET had lower fecal propionic, butyric and isobutyric acid levels than HC. Combined propionic, butyric and isobutyric acid distinguished ET from HC with an AUC of 0.751 (95% CI: 0.634-0.867). ET had lower fecal isovaleric and isobutyric acid levels than PD. Isovaleric and isobutyric acid differentiated ET from PD with an AUC of 0.743 (95% CI: 0.629-0.857). Fecal propionic acid was negatively correlated with constipation and autonomic dysfunction. Isobutyric and isovaleric acid were negatively associated with tremor severity. Lowered fecal SCFAs were related to a decreased abundance of Faecalibacterium and Catenibacterium in ET. In conclusion, fecal SCFAs were decreased in ET and correlated with clinical severity and gut microbiota changes. Fecal propionic, butyric, isobutyric and isovaleric acid might be potential diagnostic and differential diagnostic biomarkers for ET.
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Affiliation(s)
- Pei Huang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
| | - Pingchen Zhang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
| | - Juanjuan Du
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
| | - Chao Gao
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
| | - Jin Liu
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China
| | - Yuyan Tan
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China.
| | - Shengdi Chen
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 200025, Shanghai, China.
- Lab for Translational Research of Neurodegenerative Diseases, Shanghai Institute for Advanced Immunochemical Studies (SIAIS), Shanghai Tech University, 201210, Shanghai, China.
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15
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Chen M, Mor DE. Gut-to-Brain α-Synuclein Transmission in Parkinson's Disease: Evidence for Prion-like Mechanisms. Int J Mol Sci 2023; 24:ijms24087205. [PMID: 37108366 PMCID: PMC10139032 DOI: 10.3390/ijms24087205] [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: 02/21/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 04/29/2023] Open
Abstract
Parkinson's disease (PD) is a multifactorial disorder involving both motor and non-motor symptoms caused by the progressive death of distinct neuronal populations, including dopaminergic neurons in the substantia nigra. The deposition of aggregated α-synuclein protein into Lewy body inclusions is a hallmark of the disorder, and α-synuclein pathology has been found in the enteric nervous system (ENS) of PD patients up to two decades prior to diagnosis. In combination with the high occurrence of gastrointestinal dysfunction in early stages of PD, current evidence strongly suggests that some forms of PD may originate in the gut. In this review, we discuss human studies that support ENS Lewy pathology as a characteristic feature of PD, and present evidence from humans and animal model systems that α-synuclein aggregation may follow a prion-like spreading cascade from enteric neurons, through the vagal nerve, and into the brain. Given the accessibility of the human gut to pharmacologic and dietary interventions, therapeutic strategies aimed at reducing pathological α-synuclein in the gastrointestinal tract hold significant promise for PD treatment.
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Affiliation(s)
- Merry Chen
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Danielle E Mor
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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16
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Huynh VA, Takala TM, Murros KE, Diwedi B, Saris PEJ. Desulfovibrio bacteria enhance alpha-synuclein aggregation in a Caenorhabditis elegans model of Parkinson's disease. Front Cell Infect Microbiol 2023; 13:1181315. [PMID: 37197200 PMCID: PMC10183572 DOI: 10.3389/fcimb.2023.1181315] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 04/19/2023] [Indexed: 05/19/2023] Open
Abstract
Introduction The aggregation of the neuronal protein alpha-synuclein (alpha-syn) is a key feature in the pathology of Parkinson's disease (PD). Alpha-syn aggregation has been suggested to be induced in the gut cells by pathogenic gut microbes such as Desulfovibrio bacteria, which has been shown to be associated with PD. This study aimed to investigate whether Desulfovibrio bacteria induce alpha-syn aggregation. Methods Fecal samples of ten PD patients and their healthy spouses were collected for molecular detection of Desulfovibrio species, followed by bacterial isolation. Isolated Desulfovibrio strains were used as diets to feed Caenorhabditis elegans nematodes which overexpress human alpha-syn fused with yellow fluorescence protein. Curli-producing Escherichia coli MC4100, which has been shown to facilitate alpha-syn aggregation in animal models, was used as a control bacterial strain, and E. coli LSR11, incapable of producing curli, was used as another control strain. The head sections of the worms were imaged using confocal microscopy. We also performed survival assay to determine the effect of Desulfovibrio bacteria on the survival of the nematodes. Results and Discussion Statistical analysis revealed that worms fed Desulfovibrio bacteria from PD patients harbored significantly more (P<0.001, Kruskal-Wallis and Mann-Whitney U test) and larger alpha-syn aggregates (P<0.001) than worms fed Desulfovibrio bacteria from healthy individuals or worms fed E. coli strains. In addition, during similar follow-up time, worms fed Desulfovibrio strains from PD patients died in significantly higher quantities than worms fed E. coli LSR11 bacteria (P<0.01). These results suggest that Desulfovibrio bacteria contribute to PD development by inducing alpha-syn aggregation.
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Affiliation(s)
- Vy A. Huynh
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Timo M. Takala
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Kari E. Murros
- Adjunct Professor of Neurology, University of Eastern Finland, Kuopio, Finland
| | - Bidhi Diwedi
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
- University of Padova, Padova, Italy
| | - Per E. J. Saris
- Department of Microbiology, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
- *Correspondence: Per E. J. Saris,
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