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Previous issue date: 2015-08-26 / A Distrofia Muscular de Duchenne (DMD) ? uma doen?a de car?ter heredit?rio onde ocorre a aus?ncia da prote?na distrofina, levando a quadros de les?o miopatia grave decorrentes do aumento do estresse oxidativo e influxo de Ca+. Les?es na musculatura lisa intestinal podem comprometer a motilidade local devido a altera??es da estrutura da pr?pria t?nica muscular, bem como, a mudan?as morfofuncionais das estruturas do plexo mioent?rico. Este trabalho teve por objetivo avaliar as mudan?as ocorridas na t?nica muscular e nos neur?nios mioent?ricos colin?rgicos do ?leo de camundongos mdx e, os efeitos da suplementa??o com ?cido asc?rbico (AA) nestes dois componentes. Foram utilizados 30 camundongos machos C57BL/10 e 30 C57BL/10Mdx separados em grupos de acordo com a idade e tratamento (n=10): controle com 30 dias de idade (C30); distr?fico com 30 dias de idade (D30); controle com 60 dias de idade (G60); distr?fico com 60 dias de idade (D60); controle com 60 dias de idade suplementados com ?cido asc?rbico (200mg/kg de peso corporal) (CS60) e, distr?fico com 60 dias de idade suplementados com ?cido asc?rbico (200mg/kg de peso corporal) (GDS60). Ap?s o per?odo experimental os animais foram eutanasiados e os ?leos foram coletados e processados seguindo a rotina histol?gica e corados pela t?cnica de Tricr?mico de Masson e, para t?cnica histoqu?mica da Acetilcolinesterase em preparados totais de membrana. Os dados demonstraram que a espessura da t?nica muscular (?m) e a ?rea de m?sculo liso (?m2) do ?leo foi menor nos grupos distr?ficos, especialmente no grupo D30. Nos animais de DS60 a espessura da t?nica muscular foi semelhante aos de C60. Houve redu??o da densidade neuronal colin?rgica do plexo mioent?rico do ?leo foi menor nos animais D30, por?m esta foi semelhante nos animais de 60 dias sem tratamento (C60 e D60) e, maior nos animais DS60. ?rea do perfil do corpo celular (?m2) foi semelhante nos animais de C30-D30 e C60-D60, por?m est? foi maior em DS60. A raz?o ?rea nuclear/?rea citoplasm?tica foi menor em D30 e DS60 e, maior em D60. Desta forma podemos concluir que em camundongos mdx ocorrem altera??es significativas na morfologia da t?nica muscular e, consequentemente, mudan?as morfol?gicas e funcionais dos neur?nios colin?rgicos do plexo mioent?rico do ?leo, bem como, que a suplementa??o com AA teve efeito neuroprotetor nestes animais pois prevenindo a perda neuronal. / The Duchenne muscular dystrophy (DMD) is a hereditary disease where there is a lack of dystrophin protein, leading to severe injury myopathy frames resulting from increased oxidative stress and Ca + influx. Lesions on intestinal smooth muscle can compromise the local motility due to changes in the very muscular layer structure as well as the morphological and functional changes in the myenteric plexus structures. This study aimed to evaluate changes in the muscular wall and myenteric cholinergic neurons of the ileum of mdx mice, and the effects of supplementation with ascorbic acid (AA) in these two components. 30 male C57BL / 10 and 30 C57BL / 10Mdx separated into groups according to age and treatment (n = 10) were control at 30 days old (C30); dystrophic 30 days of age (D30); control with 60 days of age (C60); dystrophic with 60 days of age (D60); control at 60 days of age supplemented with ascorbic acid (200mg / kg body weight) (CS60) and dystrophic 60 days of age supplemented with ascorbic acid (200mg / kg body weight) (DS60). After the trial period the animals were euthanized and ileus have been collected and processed following the histological routine and stained by Masson's technique of Masson and for immunohistochemical technique of acetylcholinesterase in total membrane prepared. The data demonstrated that the thickness of the muscularis (?m) and smooth muscle area (?m 2) of the ileum was lower in dystrophic groups, especially Group D30. In animal DS60 the thickness of the muscular layer was similar to the C60. Decreased cholinergic neuronal density of the myenteric plexus of the ileum was lower in D30 animals, but this was similar in animals 60 days without treatment (C60 and D60) and higher in DS60 animals. Cell body profile area (?m 2) was similar in animals of C30-C60 and D30-D60, but is was higher in DS60. The nuclear area ratio / cytoplasmic area was lower in D30 and DS60 and higher in D60. Thus we conclude that mdx mice occur in significant changes in the morphology of the muscular layer and, consequently, morphological and functional changes of cholinergic neurons of the myenteric plexus of the ileum and that supplementation with AA had neuroprotective effects in these animals as preventing loss Neuronal.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/20362 |
| Date | 26 August 2015 |
| Creators | Lisboa, Marcelo Jos? Santiago |
| Contributors | 02441924990, http://lattes.cnpq.br/9094438527470150, Zanoni, Jacqueline Nelisis, 71092200959, http://lattes.cnpq.br/1247433850237825, Stabille, Sandra Regina, 32389922953, http://lattes.cnpq.br/1137729955077485, Clebis, Naianne Kelly |
| Publisher | Universidade Federal do Rio Grande do Norte, P?S-GRADUA??O EM BIOLOGIA ESTRUTURAL E FUNCIONAL, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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