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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] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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Andrade ACDSP, Campolina-Silva GH, Queiroz-Junior CM, de Oliveira LC, Lacerda LDSB, Pimenta JC, de Souza FRO, de Meira Chaves I, Passos IB, Teixeira DC, Bittencourt-Silva PG, Valadão PAC, Rossi-Oliveira L, Antunes MM, Figueiredo AFA, Wnuk NT, Temerozo JR, Ferreira AC, Cramer A, Oliveira CA, Durães-Carvalho R, Weis Arns C, Guimarães PPG, Costa GMJ, de Menezes GB, Guatimosim C, da Silva GSF, Souza TML, Barrioni BR, Pereira MDM, de Sousa LP, Teixeira MM, Costa VV. A Biosafety Level 2 Mouse Model for Studying Betacoronavirus-Induced Acute Lung Damage and Systemic Manifestations. J Virol 2021; 95:e0127621. [PMID: 34495692 PMCID: PMC8549505 DOI: 10.1128/jvi.01276-21] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/01/2021] [Indexed: 12/29/2022] Open
Abstract
The emergence of life-threatening zoonotic diseases caused by betacoronaviruses, including the ongoing coronavirus disease 19 (COVID-19) pandemic, has highlighted the need for developing preclinical models mirroring respiratory and systemic pathophysiological manifestations seen in infected humans. Here, we showed that C57BL/6J wild-type mice intranasally inoculated with the murine betacoronavirus murine hepatitis coronavirus 3 (MHV-3) develop a robust inflammatory response leading to acute lung injuries, including alveolar edema, hemorrhage, and fibrin thrombi. Although such histopathological changes seemed to resolve as the infection advanced, they efficiently impaired respiratory function, as the infected mice displayed restricted lung distention and increased respiratory frequency and ventilation. Following respiratory manifestation, the MHV-3 infection became systemic, and a high virus burden could be detected in multiple organs along with morphological changes. The systemic manifestation of MHV-3 infection was also marked by a sharp drop in the number of circulating platelets and lymphocytes, besides the augmented concentration of the proinflammatory cytokines interleukin 1 beta (IL-1β), IL-6, IL-12, gamma interferon (IFN-γ), and tumor necrosis factor (TNF), thereby mirroring some clinical features observed in moderate and severe cases of COVID-19. Importantly, both respiratory and systemic changes triggered by MHV-3 infection were greatly prevented by blocking TNF signaling, either via genetic or pharmacologic approaches. In line with this, TNF blockage also diminished the infection-mediated release of proinflammatory cytokines and virus replication of human epithelial lung cells infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Collectively, results show that MHV-3 respiratory infection leads to a large range of clinical manifestations in mice and may constitute an attractive, lower-cost, biosafety level 2 (BSL2) in vivo platform for evaluating the respiratory and multiorgan involvement of betacoronavirus infections. IMPORTANCE Mouse models have long been used as valuable in vivo platforms to investigate the pathogenesis of viral infections and effective countermeasures. The natural resistance of mice to the novel betacoronavirus SARS-CoV-2, the causative agent of COVID-19, has launched a race toward the characterization of SARS-CoV-2 infection in other animals (e.g., hamsters, cats, ferrets, bats, and monkeys), as well as adaptation of the mouse model, by modifying either the host or the virus. In the present study, we utilized a natural pathogen of mice, MHV, as a prototype to model betacoronavirus-induced acute lung injure and multiorgan involvement under biosafety level 2 conditions. We showed that C57BL/6J mice intranasally inoculated with MHV-3 develops severe disease, which includes acute lung damage and respiratory distress that precede systemic inflammation and death. Accordingly, the proposed animal model may provide a useful tool for studies regarding betacoronavirus respiratory infection and related diseases.
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Affiliation(s)
| | - Gabriel Henrique Campolina-Silva
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Celso Martins Queiroz-Junior
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Leonardo Camilo de Oliveira
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Jordane C Pimenta
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Ian de Meira Chaves
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ingredy Beatriz Passos
- Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Danielle Cunha Teixeira
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Paloma Graziele Bittencourt-Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Leonardo Rossi-Oliveira
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maisa Mota Antunes
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - André Felipe Almeida Figueiredo
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Natália Teixeira Wnuk
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Jairo R. Temerozo
- Laboratory on Thymus Research, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, RJ, Brazil
- National Institute for Science and Technology on Neuroimmunomodulation, Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, RJ, Brazil
| | - André Costa Ferreira
- National Institute for Science and Technology on Innovation on Diseases of Neglected Populations (INCT/IDNP), Center for Technological Development in Health (CDTS), Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, RJ, Brazil
- Immunopharmacology Laboratory, Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, RJ, Brazil
- Laboratório de Pesquisas Pré-clínicas, Universidade Iguaçu (UNIG), Rio de Janeiro, RJ, Brazil
| | - Allysson Cramer
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Cleida Aparecida Oliveira
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Clarice Weis Arns
- Laboratory of Virology, Universidade Estadual de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Pedro Pires Goulart Guimarães
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Guilherme Mattos Jardim Costa
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Gustavo Batista de Menezes
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Cristina Guatimosim
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Glauber Santos Ferreira da Silva
- Department of Physiology and Biophysics, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Thiago Moreno L. Souza
- National Institute for Science and Technology on Innovation on Diseases of Neglected Populations (INCT/IDNP), Center for Technological Development in Health (CDTS), Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, RJ, Brazil
- Immunopharmacology Laboratory, Oswaldo Cruz Foundation (Fiocruz), Rio de Janeiro, RJ, Brazil
| | - Breno Rocha Barrioni
- Department of Metallurgical Engineering and Materials, Federal University of Minas Gerais, School of Engineering, Belo Horizonte, Brazil
| | - Marivalda de Magalhães Pereira
- Department of Metallurgical Engineering and Materials, Federal University of Minas Gerais, School of Engineering, Belo Horizonte, Brazil
| | - Lirlândia Pires de Sousa
- Department of Clinical and Toxicological Analysis, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Mauro Martins Teixeira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Vivian Vasconcelos Costa
- Department of Morphology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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3
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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4
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Valadão PAC, de Aragão BC, Andrade JN, Magalhães-Gomes MPS, Foureaux G, Joviano-Santos JV, Nogueira JC, Machado TCG, de Jesus ICG, Nogueira JM, de Paula RS, Peixoto L, Ribeiro FM, Tapia JC, Jorge ÉC, Guatimosim S, Guatimosim C. Abnormalities in the Motor Unit of a Fast-Twitch Lower Limb Skeletal Muscle in Huntington's Disease. ASN Neuro 2020; 11:1759091419886212. [PMID: 31818120 PMCID: PMC6904785 DOI: 10.1177/1759091419886212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Huntington’s disease (HD) is a disorder characterized by chronic
involuntary movements, dementia, and psychiatric symptoms. It is
caused by a mutation in the gene that encodes for huntingtin protein
(HTT), leading to the formation of mutant proteins expressed in
various tissues. Although brain pathology has become the hallmark for
HD, recent studies suggest that damage of peripheral structures also
contributes to HD progression. We previously identified severe
alterations in the motor units that innervate cervical muscles in
12-month-old BACHD (Bacterial Artificial Chromosome Huntington’s
Disease) mice, a well-established mouse model for HD. Here, we studied
lumbar motoneurons and their projections onto hind limb fast-twitch
skeletal muscles (tibialis anterior), which control balance and gait
in HD patients. We found that lumbar motoneurons were altered in the
HD mouse model; the number and size of lumbar motoneurons were reduced
in BACHD. Structural alterations were also present in the sciatic
nerve and neuromuscular junctions. Acetylcholine receptors were
organized in several small patches (acetylcholine receptor
fragmentation), many of which were partially innervated. In BACHD
mice, we observed atrophy of tibialis anterior muscles, decreased
expression of glycolytic fast Type IIB fibers, and at the
ultrastructural level, alterations of sarcomeres and mitochondria.
Corroborating all these findings, BACHD animals performed worse on
motor behavior tests. Our results provide additional evidences that
nerve–muscle communication is impaired in HD and that motoneurons from
distinct spinal cord locations are similarly affected in the
disease.
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Affiliation(s)
| | | | - Jéssica Neves Andrade
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Giselle Foureaux
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - José Carlos Nogueira
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | | | | | - Rayan Silva de Paula
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Luisa Peixoto
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Fabíola Mara Ribeiro
- Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - ÉriKa Cristina Jorge
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Silvia Guatimosim
- Departamento de Fisiologia e Biofísica, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cristina Guatimosim
- Departamento de Morfologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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5
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Leite Schetino LP, Fonseca M, Magalhães Gomes MPS, Costa Valadão PA, Camargo WL, Rodrigues HA, Andrade JN, Arantes‐Costa FM, Naves LA, Prado CM, Prado VF, Prado MAM, Guatimosim C. Evaluation of the neuromuscular junction in a middle‐aged mouse model of congenital myasthenic syndrome. Muscle Nerve 2019; 60:790-800. [DOI: 10.1002/mus.26710] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/06/2019] [Accepted: 09/11/2019] [Indexed: 12/19/2022]
Affiliation(s)
| | - Matheus Fonseca
- Laboratório Nacional de BiociênciasCentro Nacional de Pesquisa em Energia e Materiais Campinas São Paulo Brazil
| | | | | | - Wallace Lucio Camargo
- Departamento de Fisiologia e BiofísicaUniversidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Hermann Alecsandro Rodrigues
- Departamento de Ciências Básicas da Vida, Instituto de Ciências da VidaUniversidade Federal de Juiz de Fora Campus Governador Valadares Minas Gerais Brazil
| | - Jéssica Neves Andrade
- Departamento de MorfologiaUniversidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | | | - Lígia Araujo Naves
- Departamento de Fisiologia e BiofísicaUniversidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
| | - Carla Máximo Prado
- Departmento de BiociênciasUniversidade Federal de São Paulo, Campus Baixada Santista São Paulo Brazil
| | - Vânia Ferreira Prado
- Robarts Research Institute and Department of Physiology and Pharmacology and Anatomy & Cell BiologyUniversity of Western Ontario London Ontario Canada
| | - Marco Antônio Máximo Prado
- Robarts Research Institute and Department of Physiology and Pharmacology and Anatomy & Cell BiologyUniversity of Western Ontario London Ontario Canada
| | - Cristina Guatimosim
- Departamento de MorfologiaUniversidade Federal de Minas Gerais Belo Horizonte Minas Gerais Brazil
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6
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Valadão PAC, Oliveira BDS, Joviano-Santos JV, Vieira ÉLM, Rocha NP, Teixeira AL, Guatimosim C, de Miranda AS. Inflammatory changes in peripheral organs in the BACHD murine model of Huntington's disease. Life Sci 2019; 232:116653. [DOI: 10.1016/j.lfs.2019.116653] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 07/09/2019] [Accepted: 07/10/2019] [Indexed: 12/13/2022]
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Joviano-Santos JV, Santos-Miranda A, Botelho AFM, de Jesus ICG, Andrade JN, de Oliveira Barreto T, Magalhães-Gomes MPS, Valadão PAC, Cruz JDS, Melo MM, Guatimosim S, Guatimosim C. Increased oxidative stress and CaMKII activity contribute to electro-mechanical defects in cardiomyocytes from a murine model of Huntington's disease. FEBS J 2018; 286:110-123. [PMID: 30451379 DOI: 10.1111/febs.14706] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/09/2018] [Accepted: 11/15/2018] [Indexed: 11/29/2022]
Abstract
Huntington's disease (HD) is a neurodegenerative genetic disorder. Although described as a brain pathology, there is evidence suggesting that defects in other systems can contribute to disease progression. In line with this, cardiovascular defects are a major cause of death in HD. To date, relatively little is known about the peripheral abnormalities associated with the disease. Here, we applied a range of assays to evaluate cardiac electro-mechanical properties in vivo, using a previously characterized mouse model of HD (BACHD), and in vitro, using cardiomyocytes isolated from the same mice. We observed conduction disturbances including QT interval prolongation in BACHD mice, indicative of cardiac dysfunction. Cardiomyocytes from these mice demonstrated cellular electro-mechanical abnormalities, including a prolonged action potential, arrhythmic contractions, and relaxation disturbances. Cellular arrhythmia was accompanied by an increase in calcium waves and increased Ca2+ /calmodulin-dependent protein kinase II activity, suggesting that disruption of calcium homeostasis plays a key part. We also described structural abnormalities in the mitochondria of BACHD-derived cardiomyocytes, indicative of oxidative stress. Consistent with this, imbalances in superoxide dismutase and glutathione peroxidase activities were detected. Our data provide an in vivo demonstration of cardiac abnormalities in HD together with new insights into the cellular mechanistic basis, providing a possible explanation for the higher cardiovascular risk in HD.
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Affiliation(s)
| | - Artur Santos-Miranda
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Ana Flávia Machado Botelho
- Department of Veterinary Clinic and Surgery, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Itamar Couto Guedes de Jesus
- Department of Physiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Jéssica Neves Andrade
- Department of Morphology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Tatiane de Oliveira Barreto
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | | | - Jader Dos Santos Cruz
- Department of Biochemistry and Immunology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marília Martins Melo
- Department of Veterinary Clinic and Surgery, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Silvia Guatimosim
- Department of Physiology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Cristina Guatimosim
- Department of Morphology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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8
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Valadão PAC, de Aragão BC, Andrade JN, Magalhães-Gomes MPS, Foureaux G, Joviano-Santos JV, Nogueira JC, Ribeiro FM, Tapia JC, Guatimosim C. Muscle atrophy is associated with cervical spinal motoneuron loss in BACHD mouse model for Huntington's disease. Eur J Neurosci 2017; 45:785-796. [PMID: 27992085 DOI: 10.1111/ejn.13510] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 12/07/2016] [Accepted: 12/08/2016] [Indexed: 11/26/2022]
Abstract
Involuntary choreiform movements are clinical hallmark of Huntington's disease, an autosomal dominant neurodegenerative disorder caused by an increased number of CAG trinucleotide repeats in the huntingtin gene. Involuntary movements start with an impairment of facial muscles and then affect trunk and limbs muscles. Huntington's disease symptoms are caused by changes in cortex and striatum neurons induced by mutated huntingtin protein. However, little is known about the impact of this abnormal protein in spinal cord motoneurons that control movement. Therefore, in this study we evaluated abnormalities in the motor unit (spinal cervical motoneurons, motor axons, neuromuscular junctions and muscle) in a mouse model for Huntington's disease (BACHD). Using light, fluorescence, confocal, and electron microscopy, we showed significant changes such as muscle fibers atrophy, fragmentation of neuromuscular junctions, axonal alterations, and motoneurons death in BACHD mice. Noteworthy, the surviving motoneurons from BACHD spinal cords were smaller than WT. We suggest that this loss of larger putative motoneurons is accompanied by a decrease in the expression of fast glycolytic muscle fibers in this model for Huntington's disease. These observations show spinal cord motoneurons loss in BACHD that might help to understand neuromuscular changes in Huntington's disease.
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Affiliation(s)
- Priscila Aparecida Costa Valadão
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Bárbara Campos de Aragão
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Jéssica Neves Andrade
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Matheus Proença S Magalhães-Gomes
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Giselle Foureaux
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | | | - José Carlos Nogueira
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
| | - Fabíola Mara Ribeiro
- Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Juan Carlos Tapia
- Department of Biomedical Sciences, University of Talca, Talca, Chile
| | - Cristina Guatimosim
- Departamento de Morfologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, MG, 31270-901, Brazil
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de Aragão BC, Rodrigues HA, Valadão PAC, Camargo W, Naves LA, Ribeiro FM, Guatimosim C. Changes in structure and function of diaphragm neuromuscular junctions from BACHD mouse model for Huntington's disease. Neurochem Int 2016; 93:64-72. [DOI: 10.1016/j.neuint.2015.12.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/17/2015] [Accepted: 12/28/2015] [Indexed: 10/22/2022]
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Valadão PAC, Naves LA, Gomez RS, Guatimosim C. Etomidate evokes synaptic vesicle exocytosis without increasing miniature endplate potentials frequency at the mice neuromuscular junction. Neurochem Int 2013; 63:576-82. [PMID: 24044896 DOI: 10.1016/j.neuint.2013.09.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 08/19/2013] [Accepted: 09/08/2013] [Indexed: 11/18/2022]
Abstract
Etomidate is an intravenous anesthetic used during anesthesia induction. This agent induces spontaneous movements, especially myoclonus after its administration suggesting a putative primary effect at the central nervous system or the periphery. Therefore, the aim of this study was to investigate the presynaptic and postsynaptic effects of etomidate at the mouse neuromuscular junction (NMJ). Diaphragm nerve muscle preparations were isolated and stained with the styryl dye FM1-43, a fluorescent tool that tracks synaptic vesicles exo-endocytosis that are key steps for neurotransmission. We observed that etomidate induced synaptic vesicle exocytosis in a dose-dependent fashion, an effect that was independent of voltage-gated Na(+) channels. By contrast, etomidate-evoked exocytosis was dependent on extracellular Ca(2+) because its effect was abolished in Ca(2+)-free medium and also inhibited by omega-Agatoxin IVA (30 and 200nM) suggesting the participation of P/Q-subtype Ca(2+) channels. Interestingly, even though etomidate induced synaptic vesicle exocytosis, we did not observe any significant difference in the frequency and amplitude of miniature end-plate potentials (MEPPs) in the presence of the anesthetic. We therefore investigated whether etomidate could act on nicotinic acetylcholine receptors labeled with α-bungarotoxin-Alexa 594 and we observed less fluorescence in preparations exposed to the anesthetic. In conclusion, our results suggest that etomidate exerts a presynaptic effect at the NMJ inducing synaptic vesicle exocytosis, likely through the activation of P-subtype voltage gated Ca(2+) channels without interfering with MEPPs frequency. The present data contribute to a better understanding about the effect of etomidate at the neuromuscular synapse and may help to explain some clinical effects of this agent.
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Affiliation(s)
| | - Lígia Araújo Naves
- Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Renato Santiago Gomez
- Departamento de Cirurgia, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Cristina Guatimosim
- Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
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