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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.)

Down-regulation of TUFM impairs host cell interaction and virulence by Paracoccidioides brasiliensis

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Marcos, Caroline Maria [1] ; Tamer, Gabrielle [1] ; de Oliveira, Haroldo Cesar [2, 1] ; Assato, Patricia Akemi [1] ; Scorzoni, Liliana [1, 3] ; Santos, Claudia Tavares [1] ; Singulani, Junya de Lacorte [1] ; da Silva, Julhiany de Fatima [1] ; de Almeida, Rodrigo [1] ; Alves de Paula e Silva, Ana Carolina [1] ; Moraes da Silva, Rosangela Aparecida [1] ; de Andrade, Cleverton Roberto [4] ; Tamayo, Diana Patricia [5] ; Lopez, Angela Maria [5] ; Barbosa, Natalia Moreira [6] ; Zanelli, Cleslei Fernando [6] ; Hernandez-Ruiz, Orville [5, 7] ; McEwen, Juan G. [8, 5] ; Soares Mendes-Giannini, Maria Jose [1] ; Fusco-Almeida, Ana Marisa [1]
Total Authors: 20
Affiliation:
[1] UNESP Univ Estadual Paulista, Fac Ciencias Farmaceut, Dept Anal Clin, Lab Micol Clin, Campus Araraquara, Sao Paulo, SP - Brazil
[2] Fundacao Oswaldo Cruz FIOCRUZ, Inst Carlos Chagas, Curitiba, Parana - Brazil
[3] Sao Paulo State Univ UNESP, Inst Sci & Technol, Sao Jose Dos Campos, SP - Brazil
[4] UNESP Univ Estadual Paulista, Fac Odontol, Dept Fisiol & Patol, Campus Araraquara, Sao Paulo, SP - Brazil
[5] CIB, Unidad Biol Celular & Mol, Medellin - Colombia
[6] UNESP Univ Estadual Paulista, Fac Ciencias Farmaceut, Dept Ciencias Biol, Lab Biol Mol & Celular Microrganismos, Campus Araraquara, Sao Paulo, SP - Brazil
[7] Univ Antioquia, Escuela Microbiol, Grp Invest MICROBA, Medellin - Colombia
[8] Univ Antioquia, Fac Med, Medellin - Colombia
Total Affiliations: 8
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 9, NOV 20 2019.
Web of Science Citations: 0
Abstract

The genus Paracoccidioides consist of dimorphic fungi geographically limited to the subtropical regions of Latin America, which are responsible for causing deep systemic mycosis in humans. However, the molecular mechanisms by which Paracoccidioides spp. causes the disease remain poorly understood. Paracoccidioides spp. harbor genes that encode proteins involved in host cell interaction and mitochondrial function, which together are required for pathogenicity and mediate virulence. Previously, we identified TufM (previously known as EF-Tu) in Paracoccidioides brasiliensis (PbTufM) and suggested that it may be involved in the pathogenicity of this fungus. In this study, we examined the effects of downregulating PbTUFM using a silenced strain with a 55% reduction in PbTUFM expression obtained by antisense-RNA (aRNA) technology. Silencing PbTUFM yielded phenotypic differences, such as altered translation elongation, respiratory defects, increased sensitivity of yeast cells to reactive oxygen stress, survival after macrophage phagocytosis, and reduced interaction with pneumocytes. These results were associated with reduced virulence in Galleria mellonella and murine infection models, emphasizing the importance of PbTufM in the full virulence of P. brasiliensis and its potential as a target for antifungal agents against paracoccidioidomycosis. (AU)

FAPESP's process: 13/10917-9 - Alternative animal models: Virulence of different phylogenetic species of Paracoccidioides and effect of the 30kDa 43kDa protein and their antibodies
Grantee:Liliana Scorzoni
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/17048-4 - Two-component signal transduction (TCST) system as a new target for the treatment of paracoccidioidomycosis
Grantee:Caroline Maria Marcos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/14023-8 - Use of peptides with anti-adhesive activity in Paracoccidoides spp. in the treatment and prophylaxis of the paracoccidioidomycosis
Grantee:Haroldo Cesar de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/03700-9 - Alternative animal as a model to study Paracoccidioides- host interaction: virulence, efficacy and toxicology of antifungal compounds and new preventive treatments
Grantee:Maria José Soares Mendes Giannini
Support Opportunities: Regular Research Grants
FAPESP's process: 14/10446-9 - Evaluation of new therapies and biomarkers in paracoccidioidomycosis: antifungal activity of alkyl gallates in alternative models and mice and identification of circulating microRNAs
Grantee:Junya de Lacorte Singulani
Support Opportunities: Scholarships in Brazil - Doctorate