Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Manancial - Repositório Digital da UFSM |
Texto Completo: | http://repositorio.ufsm.br/handle/1/4081 |
Resumo: | Demyelinating diseases are severe owing to the destruction of myelin sheaths present in the central (CNS) and peripheral (PNS) nervous system. The demyelination may occur in infectious and compressive diseases of the spinal cord in dogs. The experimental model of demyelination and remyelination by Ethidium Bromide (EB) promotes impairment of locomotor activities similar to those observed in multiple sclerosis (MS). The purpose of this study was to investigate the effect of flavonoid quercetin on behavioral tests, on cholinergic neurotransmission, on parameters of oxidative stress in blood, on cholinesterase activity in blood and Acetylcholinesterase (AChE) activities in lymphocytes of rats submitted to the EB experimental demyelination model and to review cases of the atlantoaxial subluxation in the neurological records of the Veterinary Hospital. In the first paper, fourteen dogs were diagnosed as affected by atlantoaxial subluxation in dogs and the condition was more frequent in toy breeds under twenty-four month old years. The main cause found for the instability was agenesis of the odontoid process. Clinical signs ranged from cranial cervical pain to non-ambulatory tetraparesis. The surgical treatment demonstrated to be efficacious. The predominant time of recovery was 30-60 days after surgery. No correlation was found between the duration of clinical signs before surgery and the time of recovery. In the experimental study, Wistar rats were randomly distributed into four groups (20 animals per group): Control (pontine saline injection and treatment with ethanol), Querc (pontine saline injection and treatment with quercetin), EB (pontine 0.1% EB injection and treatment with ethanol), and EB+Querc (pontine 0.1% EB injection and treatment with quercetin). The animals of the groups Querc and Querc + EB were treated once daily with quercetin (50mg/kg) diluted in 25% ethanol solution (1 ml / kg) and the animals of the control groups and EB were treated once daily with 25% ethanol solution (1 ml / kg). Two stages were observed: phase of demyelination with a peak on day 7 and phase of remyelination with a peak on day 21 post-inoculation of EB. In the first manuscript, the behavioral tests (the beam walking test, foot fault test and Inclined plane test), AChE activity and lipid peroxidation in the brain structures (pons, cerebellum, hippocampus, hypothalamus, striatum and cortex) were measured. Quercetin promoted earlier locomotor recovery, prevented the inhibition of AChE activity and the increase of lipidic peroxidation. In a second manuscript, parameters of oxidative stress in blood, cholinesterase activity in blood and AChE activities in lymphocytes were measured. The experimental demyelination model by EB promoted alteration in AChE activity of non neural cells, and also modified the oxidative stress parameters in the blood. In addition, quercetin was able to modulate AChE activity and of the antioxidant enzymes, as well as reduces lipid peroxidation in demyelinated rats by EB. These results may contribute to a better understanding of the neuroprotective role of quercetin and the importance of an antioxidant diet in humans and in animals, and the therapeutic potential this flavonoid in demyelination diseases, such as ME in humans, distemper in dogs, as well as in spinal cord compression (atlantoaxial subluxation). |
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Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cãesContributions in treatment of demyelination diseases: experimental study in rats and retrospective study in dogsQuercetinaCirurgiaDesmielinizaçãoColinesterasesTestes comportamentaisQuercetinSurgeryDemyelinationCholinesteraseBehavioral testsCNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIADemyelinating diseases are severe owing to the destruction of myelin sheaths present in the central (CNS) and peripheral (PNS) nervous system. The demyelination may occur in infectious and compressive diseases of the spinal cord in dogs. The experimental model of demyelination and remyelination by Ethidium Bromide (EB) promotes impairment of locomotor activities similar to those observed in multiple sclerosis (MS). The purpose of this study was to investigate the effect of flavonoid quercetin on behavioral tests, on cholinergic neurotransmission, on parameters of oxidative stress in blood, on cholinesterase activity in blood and Acetylcholinesterase (AChE) activities in lymphocytes of rats submitted to the EB experimental demyelination model and to review cases of the atlantoaxial subluxation in the neurological records of the Veterinary Hospital. In the first paper, fourteen dogs were diagnosed as affected by atlantoaxial subluxation in dogs and the condition was more frequent in toy breeds under twenty-four month old years. The main cause found for the instability was agenesis of the odontoid process. Clinical signs ranged from cranial cervical pain to non-ambulatory tetraparesis. The surgical treatment demonstrated to be efficacious. The predominant time of recovery was 30-60 days after surgery. No correlation was found between the duration of clinical signs before surgery and the time of recovery. In the experimental study, Wistar rats were randomly distributed into four groups (20 animals per group): Control (pontine saline injection and treatment with ethanol), Querc (pontine saline injection and treatment with quercetin), EB (pontine 0.1% EB injection and treatment with ethanol), and EB+Querc (pontine 0.1% EB injection and treatment with quercetin). The animals of the groups Querc and Querc + EB were treated once daily with quercetin (50mg/kg) diluted in 25% ethanol solution (1 ml / kg) and the animals of the control groups and EB were treated once daily with 25% ethanol solution (1 ml / kg). Two stages were observed: phase of demyelination with a peak on day 7 and phase of remyelination with a peak on day 21 post-inoculation of EB. In the first manuscript, the behavioral tests (the beam walking test, foot fault test and Inclined plane test), AChE activity and lipid peroxidation in the brain structures (pons, cerebellum, hippocampus, hypothalamus, striatum and cortex) were measured. Quercetin promoted earlier locomotor recovery, prevented the inhibition of AChE activity and the increase of lipidic peroxidation. In a second manuscript, parameters of oxidative stress in blood, cholinesterase activity in blood and AChE activities in lymphocytes were measured. The experimental demyelination model by EB promoted alteration in AChE activity of non neural cells, and also modified the oxidative stress parameters in the blood. In addition, quercetin was able to modulate AChE activity and of the antioxidant enzymes, as well as reduces lipid peroxidation in demyelinated rats by EB. These results may contribute to a better understanding of the neuroprotective role of quercetin and the importance of an antioxidant diet in humans and in animals, and the therapeutic potential this flavonoid in demyelination diseases, such as ME in humans, distemper in dogs, as well as in spinal cord compression (atlantoaxial subluxation).Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorAs doenças desmielinizantes são uma grave consequência da destruição das bainhas de mielina presentes no sistema nervoso central (SNC) e periférico (SNP). A desmielinização pode ocorrer tanto em doenças infecciosas como compressivas da medula espinhal em cães. O modelo experimental de desmielinização e remielinização pelo brometo de etídio (BE) promove a diminuição da atividade locomotora semelhantes às observadas na doença de esclerose múltipla (EM). O objetivo deste estudo foi investigar o efeito do flavonoide quercetina nos testes comportamentais, na neurotransmissão colinérgica, na atividade das colinesterases no sangue, na atividade da acetilcolinesterase em linfócitos e nos parâmetros de estresse oxidativo no sangue, durante os eventos de desmielinização e remielinização em ratos submetidos ao modelo experimental pelo BE e realizar levantamento de dados sobre cães com diagnóstico de subluxação atlantoaxial atendidos no hospital veterinário universitário. No primeiro artigo, foram diagnosticados 14 cães com subluxação atlantoaxial, sendo as raças de pequeno porte com idade inferior a 24 meses as mais acometidas. A principal causa da instabilidade foi a agenesia do processo odontóide do áxis e os sinais clínicos variaram desde hiperestesia cervical até tetraparesia não ambulatória. O tratamento cirúrgico demonstrou ser eficaz com tempo de recuperação predominante de 30-60 dias após a cirurgia, não existindo relação deste com a duração dos sinais clínicos. Para o estudo experimental, ratos Wistar foram distribuídos aleatoriamente em quatro grupos (20 animais por grupo): Controle (injeção de solução salina e tratamento com etanol), Querc (injeção de solução salina e tratamento com quercetina), BE (injeção de BE a 0,1% e tratamento com etanol), e BE + Querc (injeção de BE a 0,1% e tratamento com quercetina). Os animais dos grupos Querc e Querc + BE foram tratados uma vez ao dia com quercetina (50mg/kg) diluída em solução de etanol a 25% na dose de 1 ml/kg. Os animais dos grupos controle e BE foram tratados uma vez ao dia com solução de etanol a 25% na dose de 1 ml/kg. As fases avaliadas foram no pico de desmielinização (dia 7) e no pico de remielinização (dia 21), pós-inoculação de BE. No primeiro manuscrito, os testes comportamentais (teste do beam walking, teste do foot fault e teste do plano inclinado), a atividade da AChE e peroxidação lipídica nas estruturas encefálicas (hipotálamo, hipocampo, cerebelo, córtex, estriado e ponte) foram avaliadas nos dias 7 e 21 pós-inoculação de BE. O tratamento com quercetina promoveu maior velocidade de recuperação locomotora, preveniu a inibição da atividade de AChE e o aumento da peroxidação lipídica em ratos submetidos à desmielinização pelo BE. No segundo manuscrito, os parâmetros de estresse oxidativo no sangue, a atividade das colinesterases no sangue e a atividade da AChE nos linfócitos foram avaliados nos dias 7 e 21 pós-inoculação de BE. O modelo de desmielinização experimental por BE promoveu alteração na atividade da AChE no sangue total e linfócitos, e modificou os parâmetros das enzimas antioxidantes, bem como reduziu a peroxidação lipídica em ratos submetidos à desmielinização pelo BE. Estes resultados podem contribuir para uma melhor compreensão do papel neuroprotetor da quercetina, enfatizando a importância deste antioxidante na dieta humana e animal, e do potencial terapêutico deste composto em doenças desmielinizantes tais como a esclerose múltipla, a cinomose, bem como doenças traumáticas (subluxação atlantoaxial e DDIV, entre outras).Universidade Federal de Santa MariaBRMedicina VeterináriaUFSMPrograma de Pós-Graduação em Medicina VeterináriaMazzanti, Alexandrehttp://lattes.cnpq.br/3504517995843014Oliveira, Diogo Losch dehttp://lattes.cnpq.br/3056695127432911Rubin, Maribel Antonellohttp://lattes.cnpq.br/7237734243628134Spanevello, Roselia Mariahttp://lattes.cnpq.br/3446031341157893Schmatz, Robertahttp://lattes.cnpq.br/5100771532109977Beckmann, Diego Vilibaldo2017-06-012017-06-012013-02-26info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesisapplication/pdfapplication/pdfBECKMANN, Diego Vilibaldo. Contributions in treatment of demyelination diseases: experimental study in rats and retrospective study in dogs. 2013. 115 f. Tese (Doutorado em Medicina Veterinária) - Universidade Federal de Santa Maria, Santa Maria, 2013.http://repositorio.ufsm.br/handle/1/4081porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2023-05-15T18:34:49Zoai:repositorio.ufsm.br:1/4081Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2023-05-15T18:34:49Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães Contributions in treatment of demyelination diseases: experimental study in rats and retrospective study in dogs |
title |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
spellingShingle |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães Beckmann, Diego Vilibaldo Quercetina Cirurgia Desmielinização Colinesterases Testes comportamentais Quercetin Surgery Demyelination Cholinesterase Behavioral tests CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
title_short |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
title_full |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
title_fullStr |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
title_full_unstemmed |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
title_sort |
Contribuições ao tratamento de doenças desmielinizantes: estudo experimental em ratos e retrospectivo em cães |
author |
Beckmann, Diego Vilibaldo |
author_facet |
Beckmann, Diego Vilibaldo |
author_role |
author |
dc.contributor.none.fl_str_mv |
Mazzanti, Alexandre http://lattes.cnpq.br/3504517995843014 Oliveira, Diogo Losch de http://lattes.cnpq.br/3056695127432911 Rubin, Maribel Antonello http://lattes.cnpq.br/7237734243628134 Spanevello, Roselia Maria http://lattes.cnpq.br/3446031341157893 Schmatz, Roberta http://lattes.cnpq.br/5100771532109977 |
dc.contributor.author.fl_str_mv |
Beckmann, Diego Vilibaldo |
dc.subject.por.fl_str_mv |
Quercetina Cirurgia Desmielinização Colinesterases Testes comportamentais Quercetin Surgery Demyelination Cholinesterase Behavioral tests CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
topic |
Quercetina Cirurgia Desmielinização Colinesterases Testes comportamentais Quercetin Surgery Demyelination Cholinesterase Behavioral tests CNPQ::CIENCIAS AGRARIAS::MEDICINA VETERINARIA |
description |
Demyelinating diseases are severe owing to the destruction of myelin sheaths present in the central (CNS) and peripheral (PNS) nervous system. The demyelination may occur in infectious and compressive diseases of the spinal cord in dogs. The experimental model of demyelination and remyelination by Ethidium Bromide (EB) promotes impairment of locomotor activities similar to those observed in multiple sclerosis (MS). The purpose of this study was to investigate the effect of flavonoid quercetin on behavioral tests, on cholinergic neurotransmission, on parameters of oxidative stress in blood, on cholinesterase activity in blood and Acetylcholinesterase (AChE) activities in lymphocytes of rats submitted to the EB experimental demyelination model and to review cases of the atlantoaxial subluxation in the neurological records of the Veterinary Hospital. In the first paper, fourteen dogs were diagnosed as affected by atlantoaxial subluxation in dogs and the condition was more frequent in toy breeds under twenty-four month old years. The main cause found for the instability was agenesis of the odontoid process. Clinical signs ranged from cranial cervical pain to non-ambulatory tetraparesis. The surgical treatment demonstrated to be efficacious. The predominant time of recovery was 30-60 days after surgery. No correlation was found between the duration of clinical signs before surgery and the time of recovery. In the experimental study, Wistar rats were randomly distributed into four groups (20 animals per group): Control (pontine saline injection and treatment with ethanol), Querc (pontine saline injection and treatment with quercetin), EB (pontine 0.1% EB injection and treatment with ethanol), and EB+Querc (pontine 0.1% EB injection and treatment with quercetin). The animals of the groups Querc and Querc + EB were treated once daily with quercetin (50mg/kg) diluted in 25% ethanol solution (1 ml / kg) and the animals of the control groups and EB were treated once daily with 25% ethanol solution (1 ml / kg). Two stages were observed: phase of demyelination with a peak on day 7 and phase of remyelination with a peak on day 21 post-inoculation of EB. In the first manuscript, the behavioral tests (the beam walking test, foot fault test and Inclined plane test), AChE activity and lipid peroxidation in the brain structures (pons, cerebellum, hippocampus, hypothalamus, striatum and cortex) were measured. Quercetin promoted earlier locomotor recovery, prevented the inhibition of AChE activity and the increase of lipidic peroxidation. In a second manuscript, parameters of oxidative stress in blood, cholinesterase activity in blood and AChE activities in lymphocytes were measured. The experimental demyelination model by EB promoted alteration in AChE activity of non neural cells, and also modified the oxidative stress parameters in the blood. In addition, quercetin was able to modulate AChE activity and of the antioxidant enzymes, as well as reduces lipid peroxidation in demyelinated rats by EB. These results may contribute to a better understanding of the neuroprotective role of quercetin and the importance of an antioxidant diet in humans and in animals, and the therapeutic potential this flavonoid in demyelination diseases, such as ME in humans, distemper in dogs, as well as in spinal cord compression (atlantoaxial subluxation). |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-02-26 2017-06-01 2017-06-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
BECKMANN, Diego Vilibaldo. Contributions in treatment of demyelination diseases: experimental study in rats and retrospective study in dogs. 2013. 115 f. Tese (Doutorado em Medicina Veterinária) - Universidade Federal de Santa Maria, Santa Maria, 2013. http://repositorio.ufsm.br/handle/1/4081 |
identifier_str_mv |
BECKMANN, Diego Vilibaldo. Contributions in treatment of demyelination diseases: experimental study in rats and retrospective study in dogs. 2013. 115 f. Tese (Doutorado em Medicina Veterinária) - Universidade Federal de Santa Maria, Santa Maria, 2013. |
url |
http://repositorio.ufsm.br/handle/1/4081 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Medicina Veterinária UFSM Programa de Pós-Graduação em Medicina Veterinária |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria BR Medicina Veterinária UFSM Programa de Pós-Graduação em Medicina Veterinária |
dc.source.none.fl_str_mv |
reponame:Manancial - Repositório Digital da UFSM instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Manancial - Repositório Digital da UFSM |
collection |
Manancial - Repositório Digital da UFSM |
repository.name.fl_str_mv |
Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
atendimento.sib@ufsm.br||tedebc@gmail.com |
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1805922090570743808 |