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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2011.tde-10022012-144710
Document
Author
Full name
Aline Florencio Teixeira
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Ferreira, Luis Carlos de Souza (President)
Ferreira, Karen Spadari
Rodrigues, Elaine Guadelupe
Title in Portuguese
Avaliação terapêutica da formulação vacinal baseada no peptídeo P10 derivado da glicoproteína (gp43) de Paracoccidioides brasiliensis e na flagelina de Salmonella (FliCd).
Keywords in Portuguese
Paracoccidioides brasiliensis
Salmonella
Adjuvantes imunológicos
Glicopeptídeos
Glicoproteínas
Vacinas
Abstract in Portuguese
Paracoccidioidomicose (PCM) é uma doença granulomatosa sistêmica causada pelo fungo dimórfico Paracoccidioides brasiliensis. Aproximadamente 10 milhões de pessoas que vivem em áreas endêmicas estão infectadas com P. brasiliensis e até 2% destas podem desenvolver a PCM. Períodos extensos de quimioterapia são necessários e problemas de recidiva da doença são frequentes. Vacinas anti-PCM ainda não estão disponíveis para uso em humanos, porém, nos últimos anos, testes em modelo animal mostram que estratégias vacinais são viáveis. Formulações vacinais baseadas na proteína gp43 e no peptídeo P10 específico para células T CD4+ mostram-se promissores como antígenos vacinais. No presente trabalho, testamos as propriedades de uma formulação vacinal terapêutica baseada no peptídeo P10 combinado com flagelina de S. enterica, associada ou não a quimioterapia, como tratamento da PCM experimental. Os resultados indicaram que animais tratados apenas com a vacina, combinada ou não com os quimioterápicos, não demonstraram uma redução significativa da carga fúngica no pulmão. No entanto granulomas mais organizados foram observados no pulmão dos animais que receberam a formulação vacinal.
Title in English
Therapeutic evaluation of the vaccinal formulation based on P10 peptide from glicoprotein (gp43) of Paracoccidioides brasiliensis and Salmonella flagelin (FliCd).
Keywords in English
Paracoccidioides brasiliensis
Salmonella
Glycopeptides
Glycoproteins
Immunological adjuvants
Vaccines
Abstract in English
Paracoccidioidomycosis (PCM) is a systemic granulomatous disease caused by the dimorphic fungus Paracoccidioides brasiliensis. Approximately 10 million people living in endemic areas may be infected with this fungus and up to 2% of them may develop the disease. Extended periods of chemotherapy are often necessary to treat PCM and relapses occur frequently. PCM vaccines are not yet available for use in humans, but in recent years tests in animal models showed that vaccine strategies are viable. Vaccine formulations based in protein gp43 and a derived peptide P10, representing a CD4+ T cell-specific epitope, have showed promising results as vaccine antigens. In the present work, we tested the properties of a vaccine formulation based on the P10 peptide admixed with the S. enterica flagellin, in combination or not with chemotherapy, as a PCM therapeutic treatment. Treated mice, combined or not with chemotherapy, showed no significant reduction in lung fungal burden. Nonetheless, more organized lung granulomas were observed in animals that received the vaccine formulation.
 
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Publishing Date
2012-03-15
 
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