alexa The combined use of Paracoccidioides brasiliensis Pb40 and Pb27 recombinant proteins enhances chemotherapy effects in experimental paracoccidioidomycosis.
Immunology

Immunology

Journal of Vaccines & Vaccination

Author(s): Fernandes VC, Martins EM, Boeloni JN, Coitinho JB, Serakides R,

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Abstract Paracoccidioides brasiliensis is the etiological agent of paracoccidioidomycosis (PCM), a chronic granulomatous mycosis prevalent in Latin America, and cell-mediated immunity represents the main mode of protection against this fungal infection. The conventional treatment for this mycosis involves long periods of therapy resulting in sequels and a high frequency of relapse. The search for new alternative methods of treatment is thus necessary. With this aim, the objective of this work was to evaluate the potential of rPb27 and rPb40 immunization to reduce treatment length and the frequency of relapse when used as an adjuvant to fluconazole chemotherapy in experimental PCM. Combined treatment with the drug and the two proteins reduced CFUs in the lung, liver and spleen to undetectable levels and largely preserved the tissue structure of these organs. At the same time, IFN-γ and TNF-α levels were higher in mice treated as described above than in infected-only mice, while very low production of IL-10 and TGF-β was observed in this treated group. Thus, the combined treatment, using immunization with the two recombinant proteins in addition to fluconazole chemotherapy, showed an additive protective effect after intratracheal challenge. These results provide new prospects for immunotherapy as a treatment for PCM. Copyright © 2011 Institut Pasteur. Published by Elsevier Masson SAS. All rights reserved. This article was published in Microbes Infect and referenced in Journal of Vaccines & Vaccination

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