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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2012.tde-18042013-104537
Document
Author
Full name
Paulo Vitor Soeiro Pereira
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2012
Supervisor
Committee
Condino Neto, Antonio (President)
Calich, Vera Lucia Garcia
Campa, Ana
Carvalho, Beatriz Tavares Costa
Franco, Marcelo de
Title in Portuguese
BAY 41-2272: uma ferramenta farmacológica com potencial para o tratamento de infecções.
Keywords in Portuguese
Adjuvantes imunológicos
Imunologia celular
Monócitos
Utilização de fármacos
Abstract in Portuguese
Investigamos o agonista de Guanilato Ciclase solúvel, BAY 41-2272, como alternativa para compensar falhas nas funções de monócitos. Avaliamos in vitro o efeito do fármaco em células humanas de linhagem e de sangue periférico. O BAY, em células THP-1 e monócitos, aumentou a expressão de CD11b, CD18, CD14, TLR4, TLR2 e CD163 e induziu a produção de TNF-a, IL-1b, IL-6 e IL-12p70. Além disso, o fármaco aumentou a expressão gênica (CYBB, CYBA e NCF2) e protéica (p67PHOX e gp91PHOX) da NADPH oxidase. Ainda, o BAY ativa a via do NF-kB (p65) (dependente de PKG). Mais importante, o fármaco aumentou a atividade microbicida de monócitos de pacientes com DGC e deficiência de MPO a S. aureus e C. albicans. Em animais, o BAY 41-2272 induziu intenso influxo de macrófagos para o peritônio e inflamação. Ainda, potencializou o espraiamento, atividade fagocítica, atividade microbicida, produção espontânea de óxido nítrico e de peróxido de hidrogênio induzida por PMA, em macrófagos peritoneais, aumentando a proteção dos animais desafiados com C. albicans. Em conjunto, nossos resultados confirmam o potencial do BAY 41-2272, ou sua via (GCs/PKG), como alternativa para o desenvolvimento de terapias contra infecções.
Title in English
BAY 41-2272: a potential pharmacological tool to treat infection.
Keywords in English
Cellular immunology
Immunological adjuvants
Monocytes
Use of drugs
Abstract in English
We investigated the soluble guanylate cyclase agonist, BAY 41-2272, as an alternative to compensate for failures in of monocytes function. We evaluated the in vitro effect of the drug on human cells lines and peripheral blood cells. The BAY increased expression of CD11b, CD18, CD14, TLR4, TLR2 and CD163 and induce the production of TNF-a, IL-1b, IL-6 and IL-12p70 in THP-1 cells and monocytes. Furthermore, the drug increased NADPH oxidase gene (CYBB, CYBA and NCF2) and protein (gp91phox and p67phox) expression. Also, BAY activates the PKG-dependent NF-kB pathway (p65). More importantly, the drug increased microbicidal activity against S. aureus and C. albicans of monocytes from patients with CGD and MPO deficiency. In animals, BAY 41-2272 induced intense influx of macrophages to the peritoneum and inflammation. BAY potentiated the spreading, phagocytic activity, microbicidal activity, spontaneous production of nitric oxide and PMA-induced hydrogen peroxide release by peritoneal macrophages, increasing host protection against C. albicans. Taken together, our results confirm the potential of BAY 41-2272, or its pathway (sGC / PKG), as an alternative for the development of therapies against infections.
 
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Publishing Date
2013-05-23
 
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