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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Caracterização histopatlologica da mucosa nasossinual em pacientes transplantados de celulas tronco hematopoieticas (TCTH) sem e com doença do enxerto contra o hospeiro (DECH) / Histological features of the nasal mucosa in patients undergoing allogenetic hematopoietic hematopoetic stem cell transplantation with and without graft versus host disease

Ortiz, Érica, 1973- 14 August 2018 (has links)
Orientador: Carlos Takahiro Chone / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas / Made available in DSpace on 2018-08-14T17:38:33Z (GMT). No. of bitstreams: 1 Ortiz_Erica_M.pdf: 2620936 bytes, checksum: e99104f6d864e8b71f9b41dcfe9763c4 (MD5) Previous issue date: 2009 / Resumo: A imunossupressão é a principal causa de rinossinusite recorrente no transplante de células tronco hematopoiéticas (TCTH) com uma incidência aumentada na Doença do Enxerto contra o Hospedeiro (DECH) pós-TCTH. Descrições histológicas de mucosas oral, pulmonar e intestinal associadas ao TCTH e a DECH têm sido descritas. Porem, para entender melhor a fisiopatogenia da resposta imune nos pacientes transplantados, verificou-se a histologia e ultraestrutura da mucosa nasossinusal dos pacientes TCTH com e sem DECH. O processo unciforme de 24 pacientes submetidos ao TCTH (19 com DECH e 5 sem) foi submetido à análise histológica através das microscopias óptica e eletrônica de transmissão (ME). A ME mostrou alterações na estrutura ciliar, quantidade de mitocôndria, microvilos e vacuolização citoplasmática. Todos os transplantados com rinossinusite apresentaram perda ou ausência significante de cílios (P=0.018). Corpúsculos apoptóticos estavam aumentados e células caliciformes, diminuídas no epitélio nasossinusal dos pacientes transplantados com DECH crônica (P=0.04). Esta destruição epitelial poderia facilitar a penetração bacteriana ou viral, desencadeando uma recorrência ou exacerbação da infecção. / Abstract: Immunosuppression is the leading cause of recurrent sinus infections following Hematopoietic Stem Cell Transplantation (HSCT) with increased incidence of sinusitis in patients with chronic graft versus host disease (GVHD) following HSCT. Histological descriptions of the oral mucosa, lung ciliary epithelium and intestinal mucosa related to HSCT and GVHD have been described. However, we sought to verify the histological and ultra structural aspects of nasal mucosa in patients following HSCT with and without GVHD in order to better understand the pathophysiology of the immune response. The uncinate processes from 24 HSCT (19 with GVHD, 5 without) patients were subjected to histological analyses via light and transmission electron microscopy (TEM). TEM revealed altered cilia structure, mitochondria quantity, microvilli, cytoplasm vacuolization. All HSCT patients with rhinosinusitis had significant loss or absence of cilia (P=0.018). Apoptotic bodies were increased and Goblet cells decreased in nasal epithelium from patients with chronic GVHD (P=0.04).This tissue destruction would facilitate the bacterial and viral penetration and may result in a recurrence or exacerbation of the infection. / Mestrado / Otorrinolaringologia / Mestre em Ciências Médicas

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