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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Antifungal Activity of the Biphosphinic Cyclopalladate C7a against Candida albicans Yeast Forms In Vitro and In Vivo

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Munoz, Julian E. ; Rossi, Diego C. P. ; Ishida, Kelly ; Spadari, Cristina C. ; Melhem, Marcia S. C. ; Garcia, Daniel M. ; Caires, Antonio C. F. ; Taborda, Carlos P. ; Rodrigues, Elaine G.
Total Authors: 9
Document type: Journal article
Web of Science Citations: 5

Vulvovaginal and invasive candidiasis are frequent conditions in immunosuppressed individuals caused by Candida albicans and non-albicans Candida spp. Fluconazole and Amphotericin B are the main drugs used to fight the infection. However, resistance to fluconazole and other azole antifungal drugs is an important clinical problem that encourages the search for new therapeutic alternatives. In this work, we evaluate the antifungal activity of the biphosphinic cyclopalladate C7a in the in vitro and in vivo model. Our results showed fungicidal activity, with low values of minimal inhibitory concentrations and minimum fungicidal concentrations, even for fluconazole and/or miconazole resistant Candida isolates. Fluorescence microscopy and transmission electron microscopy revealed that the compound was able to inhibit the formation of hyphae/pseudohyphae and, moreover, promoted morphological alterations in cellular organelles and structures, such as disruption of cell wall, apparent mitochondrial swelling, chromatin marginalization into the nuclei and increased numbers of electronlucent vacuoles. C7a significantly decreased the biofilm formation and reduced the viability of yeast cells in mature biofilms when tested against a virulent C. albicans strain. In vivo assays demonstrated a significant decrease of fungal burden in local (vaginal canal) and disseminated (kidneys) infection. In addition, we observed a significant increase in the survival of the systemically infected animals treated with C7a. Our results suggest C7a as a novel therapeutic agent for vaginal and disseminated candidiasis, and an alternative for conventional drug-resistant Candida. (AU)

FAPESP's process: 12/08760-1 - Paracoccidioides lutzii: new challenges in developing a therapeutic vaccine. Phase 1: an experimental murine model
Grantee:Diego Conrado Pereira Rossi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/18655-3 - Paracoccidioides lutzii: development of a therapeutic vaccine from specific antigens for use in vaccine combined with the P10 peptide P. brasiliensis
Grantee:Carlos Pelleschi Taborda
Support type: Regular Research Grants