Estudo da densidade das células intersticiais de cajal e das células ganglionares no intestino terminal de ratos portadores de anomalia anorretal
Nenhuma Miniatura disponível
Arquivos
Data
2006
Autores
Macedo, Mauricio [UNIFESP]
Orientadores
Martins, José Luiz [UNIFESP]
Tipo
Tese de doutorado
Título da Revista
ISSN da Revista
Título de Volume
Resumo
Objetivo: Estudar as células ganglionares e as células intersticiais de Cajal (CIC) no intestino terminal de ratos portadores de anomalia anorretal (AAR) induzida pela etilenotiouréia (ETU). Métodos: Os animais foram distribuídos em três grupos: Grupo A - fetos normais, obtidos de ratas grávidas às quais não foi administrada ETU; Grupo S - fetos não portadores de AAR obtidos de ratas grávidas às quais foi administrada ETU e Grupo C - fetos portadores de AAR obtidos de ratas grávidas às quais foi administrada ETU. A ETU foi administrada no décimo primeiro dia de gestação na dose de 125 mg/Kg, por gavagem. As ratas foram submetidas à laparotomia e histerotomia para retirada dos fetos no vigésimo primeiro dia de gestação. O intestino terminal dos fetos foi retirado e analisado por imunohistoquímica para pesquisa das CIC e células ganglionares. Resultados: Foram encontradas diferenças estatisticamente significantes entre os grupos A, S e C quanto à densidade de CIC e de células ganglionares. O grupo A apresentou a maior densidade, seguida pelo grupo S, e a menor densidade, de ambas as células, foi encontrada no Grupo C. Não se observou diferença estatisticamente significante entre os três tipos de anomalia anorretal obtidos, quanto à densidade de ambas as células. Conclusão: Existe uma menor densidade de CIC e de células ganglionares no intestino terminal de ratos portadores de AAR.
Objective: to study the ganglion cells and the interstitial cells of Cajal (ICC) in the terminal bowel of rats with ethylenethiourea (ETU)-induced anorectal malformations (ARM). Methods: the animals were divided into three groups: Group A – normal fetuses from pregnant rats that were not administered ETU; Group B – fetuses without ARM born from pregnant rats that were administered ETU and Group C - fetuses with ARM born from pregnant rats that received ETU. ETU was administered on the 11 th day of pregnancy at the dose of 125 mg/kg body weight by gastric gavage. The rats had cesarean section on the 21 st day of gestation. The fetuses’ terminal bowel tissue was analyzed by immunohistochemistry to demonstrate ICC and ganglion cells. Results: statistically significant differences were found between groups A, B and C regarding ICC and ganglion cell densities. Group A had the highest cell density, followed by Group B and the lowest density of both cells was found in Group C. There were no statistically significant differences between the three types of ARM regarding the density of either cell. Conclusion: ICC and ganglion cell densities are decreased in the terminal bowel of rats with ARM
Objective: to study the ganglion cells and the interstitial cells of Cajal (ICC) in the terminal bowel of rats with ethylenethiourea (ETU)-induced anorectal malformations (ARM). Methods: the animals were divided into three groups: Group A – normal fetuses from pregnant rats that were not administered ETU; Group B – fetuses without ARM born from pregnant rats that were administered ETU and Group C - fetuses with ARM born from pregnant rats that received ETU. ETU was administered on the 11 th day of pregnancy at the dose of 125 mg/kg body weight by gastric gavage. The rats had cesarean section on the 21 st day of gestation. The fetuses’ terminal bowel tissue was analyzed by immunohistochemistry to demonstrate ICC and ganglion cells. Results: statistically significant differences were found between groups A, B and C regarding ICC and ganglion cell densities. Group A had the highest cell density, followed by Group B and the lowest density of both cells was found in Group C. There were no statistically significant differences between the three types of ARM regarding the density of either cell. Conclusion: ICC and ganglion cell densities are decreased in the terminal bowel of rats with ARM
Descrição
Citação
São Paulo: [s.n.], 2006. 68 p.