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Field SE, Curle AJ, Barker RA. Inflammation and Huntington's disease - a neglected therapeutic target? Expert Opin Investig Drugs 2024; 33:451-467. [PMID: 38758356 DOI: 10.1080/13543784.2024.2348738] [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: 12/19/2023] [Accepted: 04/24/2024] [Indexed: 05/18/2024]
Abstract
INTRODUCTION Huntington's Disease (HD) is a genetic neurodegenerative disease for which there is currently no disease-modifying treatment. One of several underlying mechanisms proposed to be involved in HD pathogenesis is inflammation; there is now accumulating evidence that the immune system may play an integral role in disease pathology and progression. As such, modulation of the immune system could be a potential therapeutic target for HD. AREAS COVERED To date, the number of trials targeting immune aspects of HD has been limited. However, targeting it, may have great advantages over other therapeutic areas, given that many drugs already exist that have actions in this system coupled to the fact that inflammation can be measured both peripherally and, to some extent, centrally using CSF and PET imaging. In this review, we look at evidence that the immune system and the newly emerging area of the microbiome are altered in HD patients, and then present and discuss clinical trials that have targeted different parts of the immune system. EXPERT OPINION We then conclude by discussing how this field might develop going forward, focusing on the role of imaging and other biomarkers to monitor central immune activation and response to novel treatments in HD.
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Affiliation(s)
- Sophie E Field
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, and MRC-WT Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Annabel J Curle
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, and MRC-WT Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
| | - Roger A Barker
- Department of Clinical Neurosciences, John van Geest Centre for Brain Repair, and MRC-WT Cambridge Stem Cell Institute, University of Cambridge, Cambridge, UK
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Shan C, Zhang C, Zhang C. The Role of IL-6 in Neurodegenerative Disorders. Neurochem Res 2024; 49:834-846. [PMID: 38227113 DOI: 10.1007/s11064-023-04085-6] [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: 10/11/2023] [Revised: 11/26/2023] [Accepted: 12/08/2023] [Indexed: 01/17/2024]
Abstract
"Neurodegenerative disorder" is an umbrella term for a group of fatal progressive neurological illnesses characterized by neuronal loss and inflammation. Interleukin-6 (IL-6), a pleiotropic cytokine, significantly affects the activities of nerve cells and plays a pivotal role in neuroinflammation. Furthermore, as high levels of IL-6 have been frequently observed in association with several neurodegenerative disorders, it may potentially be used as a biomarker for the progression and prognosis of these diseases. This review summarizes the production and function of IL-6 as well as its downstream signaling pathways. Moreover, we make a comprehensive review on the roles of IL-6 in neurodegenerative disorders and its potential clinical application.
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Affiliation(s)
- Chen Shan
- National Center for Clinical Laboratories, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology, Beijing, People's Republic of China
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Chao Zhang
- National Center for Clinical Laboratories, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology, Beijing, People's Republic of China.
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
| | - Chuanbao Zhang
- National Center for Clinical Laboratories, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology, Beijing, People's Republic of China.
- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
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Soltani Khaboushan A, Moeinafshar A, Ersi MH, Teixeira AL, Majidi Zolbin M, Kajbafzadeh AM. Circulating levels of inflammatory biomarkers in Huntington's disease: A systematic review and meta-analysis. J Neuroimmunol 2023; 385:578243. [PMID: 37984118 DOI: 10.1016/j.jneuroim.2023.578243] [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: 08/12/2023] [Revised: 09/27/2023] [Accepted: 11/06/2023] [Indexed: 11/22/2023]
Abstract
BACKGROUND Huntington's disease (HD) is an autosomal dominant disease caused by an abnormally high number of CAG repeats at the huntingtin-encoding gene, HTT. This genetic alteration results in the expression of a mutant form of the protein (mHTT) and the formation of intracellular aggregates, inducing an inflammatory state within the affected areas. This dysfunction of inflammatory response leads to elevated levels of related inflammatory markers in both CNS tissue samples and body fluids. This study aims to investigate peripheral/blood concentrations of inflammatory molecules in HD. METHODS A search was conducted in MEDLINE, Scopus, Web of Science, and Embase databases until March 30th, 2023. Random-effect meta-analysis was used for exploring concentrations of inflammatory molecules in HD. Subgroup and sensitivity analyses were used to assess heterogeneity among the included studies. The study protocol has been registered in PROSPERO with the ID number CRD42022296078. RESULTS Ten studies were included in the meta-analysis. Plasma levels of Interleukin 6 (IL-6) and IL-10 were higher in HD compared to controls. Other biomarkers, namely, complement component C-reactive protein (CRP), C3, interferon-γ (IFN-γ), IL-1, IL-2, IL-8, and tumor necrosis factor-α (TNF-α), did not show any significant differences between the two groups. In addition, the subgroup analysis results established no significant differences in levels of these biomarkers in body fluids among premanifest and manifest HD patients. CONCLUSION The results of this study provide evidence for the presence of higher plasma levels of IL-6 and IL-10 in HD patients in comparison with healthy controls.
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Affiliation(s)
- Alireza Soltani Khaboushan
- Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran; Students' Scientific Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Aysan Moeinafshar
- Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Mohammad Hamed Ersi
- Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran; Evidence Based Medicine Center, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Antonio L Teixeira
- Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Masoumeh Majidi Zolbin
- Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran
| | - Abdol-Mohammad Kajbafzadeh
- Pediatric Urology and Regenerative Medicine Research Center, Gene, Cell and Tissue Research Institute, Children's Medical Center, Tehran University of Medical Science, Tehran, Iran.
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Jia Q, Li S, Li XJ, Yin P. Neuroinflammation in Huntington's disease: From animal models to clinical therapeutics. Front Immunol 2022; 13:1088124. [PMID: 36618375 PMCID: PMC9815700 DOI: 10.3389/fimmu.2022.1088124] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Huntington's disease (HD) is a progressive neurodegenerative disease characterized by preferential loss of neurons in the striatum in patients, which leads to motor and cognitive impairments and death that often occurs 10-15 years after the onset of symptoms. The expansion of a glutamine repeat (>36 glutamines) in the N-terminal region of huntingtin (HTT) has been defined as the cause of HD, but the mechanism underlying neuronal death remains unclear. Multiple mechanisms, including inflammation, may jointly contribute to HD pathogenesis. Altered inflammation response is evident even before the onset of classical symptoms of HD. In this review, we summarize the current evidence on immune and inflammatory changes, from HD animal models to clinical phenomenon of patients with HD. The understanding of the impact of inflammation on HD would help develop novel strategies to treat HD.
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Affiliation(s)
| | | | | | - Peng Yin
- *Correspondence: Xiao-Jiang Li, ; Peng Yin,
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de Oliveira Furlam T, Roque IG, Machado da Silva EW, Vianna PP, Costa Valadão PA, Guatimosim C, Teixeira AL, de Miranda AS. Inflammasome activation and assembly in Huntington's disease. Mol Immunol 2022; 151:134-142. [PMID: 36126501 DOI: 10.1016/j.molimm.2022.09.002] [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: 05/16/2022] [Revised: 08/24/2022] [Accepted: 09/04/2022] [Indexed: 11/16/2022]
Abstract
Huntington's disease (HD) is a rare neurodegenerative disease characterized by motor, cognitive, and psychiatric symptoms. Inflammasomes are multiprotein complexes capable of sensing pathogen-associated and damage-associated molecular patterns, triggering innate immune pathways. Activation of inflammasomes results in a pro-inflammatory cascade involving, among other molecules, caspases and interleukins. NLRP3 (nucleotide-binding domain, leucine-rich-repeat containing family, pyrin domain-containing 3) is the most studied inflammasome complex, and its activation results in caspase-1 mediated cleavage of the pro-interleukins IL-1β and IL-18 into their mature forms, also inducing a gasdermin D mediated form of pro-inflammatory cell death, i.e. pyroptosis. Accumulating evidence has implicated NLRP3 inflammasome complex in neurodegenerative diseases. The evidence in HD is still scant and mostly derived from pre-clinical studies. This review aims to present the available evidence on NLRP3 inflammasome activation in HD and to discuss whether targeting this innate immune system complex might be a promising therapeutic strategy to alleviate its symptoms.
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Affiliation(s)
| | | | | | - Pedro Parenti Vianna
- School of Medicine, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Cristina Guatimosim
- Department of Morphology - Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Antônio Lúcio Teixeira
- Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA; Faculdade Santa Casa BH, Belo Horizonte, MG, Brazil
| | - Aline Silva de Miranda
- Department of Morphology - Biological Science Institute, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil.
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Behavioral- and blood-based biomarkers for Huntington's disease: Studies on the R6/1 mouse model with prospects for early diagnosis and monitoring of the disease. Brain Behav Immun Health 2022; 23:100482. [PMID: 35799674 PMCID: PMC9253406 DOI: 10.1016/j.bbih.2022.100482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 05/31/2022] [Accepted: 06/13/2022] [Indexed: 11/21/2022] Open
Abstract
Background Objective Methods Results Conclusion Gender is one of the factors that determine the rate of progression of Huntington's disease symptoms. A set of non-invasive biomarkers that are useful in the diagnosis and monitoring of Huntington's disease progression. Hormonal profile may be a factor in the efficacy of potential therapy for Huntington's disease.
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Gómez-Jaramillo L, Cano-Cano F, González-Montelongo MDC, Campos-Caro A, Aguilar-Diosdado M, Arroba AI. A New Perspective on Huntington's Disease: How a Neurological Disorder Influences the Peripheral Tissues. Int J Mol Sci 2022; 23:6089. [PMID: 35682773 PMCID: PMC9181740 DOI: 10.3390/ijms23116089] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/24/2022] [Accepted: 05/25/2022] [Indexed: 11/22/2022] Open
Abstract
Huntington's disease (HD) is a neurodegenerative disorder caused by a toxic, aggregation-prone expansion of CAG repeats in the HTT gene with an age-dependent progression that leads to behavioral, cognitive and motor symptoms. Principally affecting the frontal cortex and the striatum, mHTT disrupts many cellular functions. In fact, increasing evidence shows that peripheral tissues are affected by neurodegenerative diseases. It establishes an active crosstalk between peripheral tissues and the brain in different neurodegenerative diseases. This review focuses on the current knowledge of peripheral tissue effects in HD animal and cell experimental models and identifies biomarkers and mechanisms involved or affected in the progression of the disease as new therapeutic or early diagnostic options. The particular changes in serum/plasma, blood cells such as lymphocytes, immune blood cells, the pancreas, the heart, the retina, the liver, the kidney and pericytes as a part of the blood-brain barrier are described. It is important to note that several changes in different mouse models of HD present differences between them and between the different ages analyzed. The understanding of the impact of peripheral organ inflammation in HD may open new avenues for the development of novel therapeutic targets.
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Affiliation(s)
- Laura Gómez-Jaramillo
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
| | - Fátima Cano-Cano
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
| | - María del Carmen González-Montelongo
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
| | - Antonio Campos-Caro
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
- Área de Genética, Departamento de Biomedicina, Biotecnología y Salud Pública, Universidad de Cádiz, 11002 Cádiz, Spain
| | - Manuel Aguilar-Diosdado
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
- Departamento de Endocrinología y Nutrición, Hospital Universitario Puerta del Mar, Universidad de Cádiz, 11002 Cádiz, Spain
| | - Ana I. Arroba
- Undad de Investigación, Instituto de Investigación e Innovación en Ciencias Biomédicas de la Provincia de Cádiz (INiBICA), 11002 Cádiz, Spain; (L.G.-J.); (F.C.-C.); (M.d.C.G.-M.); (A.C.-C.); (M.A.-D.)
- Área de Genética, Departamento de Biomedicina, Biotecnología y Salud Pública, Universidad de Cádiz, 11002 Cádiz, Spain
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Saba J, Couselo FL, Bruno J, Carniglia L, Durand D, Lasaga M, Caruso C. Neuroinflammation in Huntington's Disease: A Starring Role for Astrocyte and Microglia. Curr Neuropharmacol 2022; 20:1116-1143. [PMID: 34852742 PMCID: PMC9886821 DOI: 10.2174/1570159x19666211201094608] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/06/2021] [Accepted: 11/26/2021] [Indexed: 11/22/2022] Open
Abstract
Huntington's disease (HD) is a neurodegenerative genetic disorder caused by a CAG repeat expansion in the huntingtin gene. HD causes motor, cognitive, and behavioral dysfunction. Since no existing treatment affects the course of this disease, new treatments are needed. Inflammation is frequently observed in HD patients before symptom onset. Neuroinflammation, characterized by the presence of reactive microglia, astrocytes and inflammatory factors within the brain, is also detected early. However, in comparison to other neurodegenerative diseases, the role of neuroinflammation in HD is much less known. Work has been dedicated to altered microglial and astrocytic functions in the context of HD, but less attention has been given to glial participation in neuroinflammation. This review describes evidence of inflammation in HD patients and animal models. It also discusses recent knowledge on neuroinflammation in HD, highlighting astrocyte and microglia involvement in the disease and considering anti-inflammatory therapeutic approaches.
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Affiliation(s)
- Julieta Saba
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Federico López Couselo
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Julieta Bruno
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Lila Carniglia
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Daniela Durand
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mercedes Lasaga
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Carla Caruso
- Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina,Address correspondence to this author at the Instituto de Investigaciones Biomédicas (INBIOMED), UBA-CONICET, Paraguay 2155 Piso 10, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina, Tel: +54 11 5285 3380; E-mail:
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Santos RPM, Ribeiro R, Ferreira-Vieira TH, Aires RD, de Souza JM, Oliveira BS, Lima ALD, de Oliveira ACP, Reis HJ, de Miranda AS, Vieira EML, Ribeiro FM, Vieira LB. Metabotropic glutamate receptor 5 knockout rescues obesity phenotype in a mouse model of Huntington's disease. Sci Rep 2022; 12:5621. [PMID: 35379852 PMCID: PMC8980063 DOI: 10.1038/s41598-022-08924-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 02/17/2022] [Indexed: 12/12/2022] Open
Abstract
Obesity represents a global health problem and is characterized by metabolic dysfunctions and a low-grade chronic inflammatory state, which can increase the risk of comorbidities, such as atherosclerosis, diabetes and insulin resistance. Here we tested the hypothesis that the genetic deletion of metabotropic glutamate receptor 5 (mGluR5) may rescue metabolic and inflammatory features present in BACHD mice, a mouse model of Huntington's disease (HD) with an obese phenotype. For that, we crossed BACHD and mGluR5 knockout mice (mGluR5-/-) in order to obtain the following groups: Wild type (WT), mGluR5-/-, BACHD and BACHD/mGluR5-/- (double mutant mice). Our results showed that the double mutant mice present decreased body weight as compared to BACHD mice in all tested ages and reduced visceral adiposity as compared to BACHD at 6 months of age. Additionally, 12-month-old double mutant mice present increased adipose tissue levels of adiponectin, decreased leptin levels, and increased IL-10/TNF ratio as compared to BACHD mice. Taken together, our preliminary data propose that the absence of mGluR5 reduce weight gain and visceral adiposity in BACHD mice, along with a decrease in the inflammatory state in the visceral adipose tissue (VAT), which may indicate that mGluR5 may play a role in adiposity modulation.
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Affiliation(s)
- Rebeca P M Santos
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Roberta Ribeiro
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Talita H Ferreira-Vieira
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil
- Faculdade Sete Lagoas, Sete Lagoas, Brazil
| | - Rosaria D Aires
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
- Faculdade Sete Lagoas, Sete Lagoas, Brazil
| | - Jessica M de Souza
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil
| | - Bruna S Oliveira
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Anna Luiza D Lima
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Antônio Carlos P de Oliveira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Helton J Reis
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Aline S de Miranda
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Erica M L Vieira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil
| | - Fabiola M Ribeiro
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, CEP 31270-901, Brazil.
| | - Luciene B Vieira
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, Ave. Antonio Carlos 6627, Belo Horizonte, MG, CEP 31270-901, Brazil.
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Dhankhar J, Agrawal N, Shrivastava A. Pan-neuronal expression of human mutant huntingtin protein in Drosophila impairs immune response of hemocytes. J Neuroimmunol 2021; 363:577801. [PMID: 34973473 DOI: 10.1016/j.jneuroim.2021.577801] [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: 09/20/2021] [Revised: 12/20/2021] [Accepted: 12/22/2021] [Indexed: 11/19/2022]
Abstract
Huntington's disease (HD) is a late-onset; progressive, dominantly inherited neurological disorder marked by an abnormal expansion of polyglutamine (poly Q) repeats in Huntingtin (HTT) protein. The pathological effects of mutant Huntingtin (mHTT) are not restricted to the nervous system but systemic abnormalities including immune dysregulation have been evidenced in clinical and experimental settings of HD. Indeed, mHTT is ubiquitously expressed and could induce cellular toxicity by directly acting on immune cells. However, it is still unclear if selective expression of mHTT exon1 in neurons could induce immune responses and hemocytes' function. In the present study, we intended to monitor perturbations in the hemocytes' population and their physiological functions in Drosophila, caused by pan-neuronal expression of mHTT protein. A measure of hemocyte count and their physiological activities caused by pan-neuronal expression of mHTT protein highlighted the extent of immune dysregulation occurring with disease progression. We found that pan-neuronal expression of mHTT significantly alters crystal cells and plasmatocyte count in larvae and adults with disease progression. Interestingly, plasmatocytes isolated from diseased conditions exhibit a gradual decline in phagocytic activity ex vivo at progressive stages of the disease as compared to age-matched control groups. In addition, diseased flies displayed elevated reactive oxygen species (ROS) in circulating plasmatocytes at the larval stage and in sessile plasmatocytes of hematopoietic pockets at terminal stages of disease. These findings strongly implicate that neuronal expression of mHTT alone is sufficient to induce non-cell-autonomous immune dysregulation in vivo.
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Affiliation(s)
- Jyoti Dhankhar
- Department of Zoology, University of Delhi, New Delhi 110007, India
| | - Namita Agrawal
- Department of Zoology, University of Delhi, New Delhi 110007, India.
| | - Anju Shrivastava
- Department of Zoology, University of Delhi, New Delhi 110007, India.
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11
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Yang X, Chu SF, Wang ZZ, Li FF, Yuan YH, Chen NH. Ginsenoside Rg1 exerts neuroprotective effects in 3-nitropronpionic acid-induced mouse model of Huntington's disease via suppressing MAPKs and NF-κB pathways in the striatum. Acta Pharmacol Sin 2021; 42:1409-1421. [PMID: 33214696 PMCID: PMC8379213 DOI: 10.1038/s41401-020-00558-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/18/2020] [Indexed: 12/16/2022] Open
Abstract
Huntington's disease (HD) is one of main neurodegenerative diseases, characterized by striatal atrophy, involuntary movements, and motor incoordination. Ginsenoside Rg1 (Rg1), an active ingredient in ginseng, possesses a variety of neuroprotective effects with low toxicity and side effects. In this study, we investigated the potential therapeutic effects of Rg1 in a mouse model of HD and explored the underlying mechanisms. HD was induced in mice by injection of 3-nitropropionic acid (3-NP, i.p.) for 4 days. From the first day of 3-NP injection, the mice were administered Rg1 (10, 20, 40 mg·kg-1, p.o.) for 5 days. We showed that oral pretreatment with Rg1 alleviated 3-NP-induced body weight loss and behavioral defects. Furthermore, pretreatment with Rg1 ameliorated 3-NP-induced neuronal loss and ultrastructural morphological damage in the striatum. Moreover, pretreatment with Rg1 reduced 3-NP-induced apoptosis and inhibited the activation of microglia, inflammatory mediators in the striatum. We revealed that Rg1 exerted neuroprotective effects by suppressing 3-NP-induced activation of the MAPKs and NF-κΒ signaling pathways in the striatum. Thus, our results suggest that Rg1 exerts therapeutic effects on 3-NP-induced HD mouse model via suppressing MAPKs and NF-κΒ signaling pathways. Rg1 may be served as a novel therapeutic option for HD.
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12
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Valadão PAC, Santos KBS, Ferreira E Vieira TH, Macedo E Cordeiro T, Teixeira AL, Guatimosim C, de Miranda AS. Inflammation in Huntington's disease: A few new twists on an old tale. J Neuroimmunol 2020; 348:577380. [PMID: 32896821 DOI: 10.1016/j.jneuroim.2020.577380] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/28/2020] [Accepted: 08/29/2020] [Indexed: 12/15/2022]
Abstract
Huntington's disease (HD) is a neurodegenerative disease characterized by prominent loss of neurons in the striatum and cortex. Traditionally research in HD has focused on brain changes as they cause progressive motor dysfunction, cognitive decline and psychiatric disorders. The discovery that huntingtin protein (HTT) and its mutated form (mHTT) are expressed not only in the brain but also in different organs and tissues paved the way for the hypothesis that HD might affect regions beyond the central nervous system (CNS). Besides pathological deposition of mHTT, other mechanisms, including inflammation, seem to underlie HD pathogenesis and progression. Altered inflammation can be evidenced even before the onset of classical symptoms of HD. Herein, we will discuss current pre-clinical and clinical evidence on immune/inflammatory changes in peripheral organs during HD development and progression. The understanding of the impact of inflammation on peripheral organs may open new venues for the development of novel therapeutic targets in HD.
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Affiliation(s)
| | - Kívia Barretos S Santos
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Talita Hélen Ferreira E Vieira
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Departamento de Fisioterapia, Faculdade Sete Lagoas, Sete Lagoas, MG, Brazil
| | - Thiago Macedo E Cordeiro
- Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, UFMG, Belo Horizonte, Minas Gerais, Brazil
| | - Antonio Lucio Teixeira
- Santa Casa BH Ensino e Pesquisa, Belo Horizonte, Brazil; Neuropsychiatry Program, Department of Psychiatry and Behavioral Sciences, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Cristina Guatimosim
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Aline Silva de Miranda
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Laboratório Interdisciplinar de Investigação Médica, Faculdade de Medicina, UFMG, Belo Horizonte, Minas Gerais, Brazil.
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Dhankhar J, Agrawal N, Shrivastava A. An interplay between immune response and neurodegenerative disease progression: An assessment using Drosophila as a model. J Neuroimmunol 2020; 346:577302. [PMID: 32683186 DOI: 10.1016/j.jneuroim.2020.577302] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 06/20/2020] [Accepted: 06/21/2020] [Indexed: 02/07/2023]
Abstract
Neurodegeneration, the slow and progressive loss of neurons in the central nervous system has become a major challenge to public health worldwide particularly with elderly people. Until recently, the brain and immune system were studied exclusively, independent of each other representing two distinct systems. Recent studies ensue crosstalk between these two systems to maintain homeostasis. Though the progressive loss of specific neuronal subsets is a hallmark of neurodegenerative disease, emerging evidences indicate that immune response also plays a critical role in disease progression. Due to conservation of mechanisms that govern neural development and innate immune activation in flies and humans, and availability of powerful genetic tools, the fruit fly Drosophila melanogaster is one of the best model organisms to investigate the immune response in neurodegenerative disease. Owing to significant homology between human and Drosophila immune system and recent reports on interplay between immune system and neurodegenerative disease progression, the main focus of the review is to develop a comprehensive understanding of how neuro-immune interactions contribute to neurodegeneration using Drosophila as a model system.
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Affiliation(s)
- Jyoti Dhankhar
- Department of Zoology, University of Delhi, Delhi, India
| | - Namita Agrawal
- Department of Zoology, University of Delhi, Delhi, India
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