Determinação de genes/proteínas endossomais em Paracoccidioides brasiliensis e em macrófagos infectados e não infectados
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Data
2013-03-01
Autores
Voltan, Aline Raquel [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Os fungos dimórficos, Paracoccidioides brasiliensis (espécies cripticas S1, PS2, PS3) e Paracoccidioides lutzii (Pb01-like espécies), são agentes da paracoccidioidomicose (PCM), doença granulomatosa crônica, endêmica na América Latina, principalmente no Brasil. A doença apresenta grande variedade de manifestações clínicas, desde formas localizadas até disseminadas evoluindo para letalidade. O fungo tem capacidade de aderir, invadir e extravasar barreiras impostas pelos tecidos do hospedeiro. P. brasiliensis (Pb18) já foi observado tanto no interior de macrófagos, como no interior de células epiteliais in vivo e in vitro. A identificação do mecanismo pelo qual este fungo sobrevive no interior da célula hospedeira é campo fértil para a descoberta de sua patogênese, já que este microrganismo possui a capacidade de induzir sua própria endocitose em células epiteliais e muito provavelmente em macrófagos. A absorção de micronutrientes pelo fungo apresenta papel singular, tanto para sua nutrição e processo invasivo, como para sua sobrevivência no interior da célula hospedeira. A via endocítica em microrganismos é de fundamental importância na regulação de todo esse processo. O objetivo deste estudo foi avaliar a via endocítica de Pb18 e também de macrófagos infectados com este fungo. A avaliação da via endocítica de Pb18 foi realizada na condição de depleção de metais, onde foram analisados os genes Clatrina e Ypt7 (Homólogo de Rab7) por RT-PCR semi-quantitativo e PCR em tempo real (RT-PCR quantitativo). Também foi analisada a infecção de macrófagos por Pb18 cultivado na depleção de metais e em diferentes tensões de oxigênio. A via endocítica de macrófagos foi analisada por RT-PCR quantitativo e imunofluorescência. Esta análise foi realizada quando o fungo foi cultivado em...
The dimorphic fungus, Paracoccidioides brasiliensis (cryptic species S1, PS2, PS3) and Paracoccidioides lutzii (Pb01-like species), are agents of paracoccidioidomycosis (PCM), chronic granulomatous disease, endemic in Latin America, especially in Brazil. The disease has a wide variety of clinical manifestations, from localized forms to disseminated evolving to lethality. The fungus is able to adhere, invade and spill barriers imposed by host tissues. P. brasiliensis (Pb18) has already been observed both within macrophages, but also inside of epithelial cells in vivo and in vitro. Identification of the mechanism by which this fungus survive within the host cell is a fertile field for the discovery of their pathogenesis, since this microorganism has the ability to induce its own endocytosis in epithelial cells and most probably in macrophages. The micronutrient uptake by the fungus presents unique role, both for its nutritional and invasive procedure, such as for survival within the host cell. The endocytic pathway in microorganisms is of fundamental importance in the regulation of this process. The aim of this study was to evaluate the endocytic pathway of Pb18 and also macrophages infected with this fungus. The evaluation of the endocytic pathway of Pb18 was performed under the condition that depletion of metals, where the genes were analyzed Clathrin and Ypt7 (Rab7 homolog) by RT-PCR semi-quantitative and real-time PCR (RT-PCR quantitative). Was also analyzed by Pb18 infection of macrophages cultured in the depletion of metals at different oxygen tensions. The endocytic pathway of macrophages was analyzed by quantitative RT-PCR and immunofluorescence. This analysis was performed when the fungus was grown at different oxygen tensions and macrophages were infected with this and when the infection was incubated at... (Complete abstract click electronic access below)
The dimorphic fungus, Paracoccidioides brasiliensis (cryptic species S1, PS2, PS3) and Paracoccidioides lutzii (Pb01-like species), are agents of paracoccidioidomycosis (PCM), chronic granulomatous disease, endemic in Latin America, especially in Brazil. The disease has a wide variety of clinical manifestations, from localized forms to disseminated evolving to lethality. The fungus is able to adhere, invade and spill barriers imposed by host tissues. P. brasiliensis (Pb18) has already been observed both within macrophages, but also inside of epithelial cells in vivo and in vitro. Identification of the mechanism by which this fungus survive within the host cell is a fertile field for the discovery of their pathogenesis, since this microorganism has the ability to induce its own endocytosis in epithelial cells and most probably in macrophages. The micronutrient uptake by the fungus presents unique role, both for its nutritional and invasive procedure, such as for survival within the host cell. The endocytic pathway in microorganisms is of fundamental importance in the regulation of this process. The aim of this study was to evaluate the endocytic pathway of Pb18 and also macrophages infected with this fungus. The evaluation of the endocytic pathway of Pb18 was performed under the condition that depletion of metals, where the genes were analyzed Clathrin and Ypt7 (Rab7 homolog) by RT-PCR semi-quantitative and real-time PCR (RT-PCR quantitative). Was also analyzed by Pb18 infection of macrophages cultured in the depletion of metals at different oxygen tensions. The endocytic pathway of macrophages was analyzed by quantitative RT-PCR and immunofluorescence. This analysis was performed when the fungus was grown at different oxygen tensions and macrophages were infected with this and when the infection was incubated at... (Complete abstract click electronic access below)
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Palavras-chave
Paracoccidioides brasiliensis, Paracoccidioidomicose, Macrofagos, Fungos - Culturas e meios de cultura, Micologia, Mycology
Como citar
VOLTAN, Aline Raquel. Determinação de genes/proteínas endossomais em Paracoccidioides brasiliensis e em macrófagos infectados e não infectados. 2013. 109 f. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Farmacêuticas de Araraquara, 2013.