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Conceição PM, Chaves AFA, Navarro MV, Castilho DG, Calado JCP, Haniu AECJ, Xander P, Batista WL. Cross-talk between the Ras GTPase and the Hog1 survival pathways in response to nitrosative stress in Paracoccidioides brasiliensis. Nitric Oxide 2019; 86:1-11. [PMID: 30772503 DOI: 10.1016/j.niox.2019.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 01/10/2019] [Accepted: 02/12/2019] [Indexed: 10/27/2022]
Abstract
Paracoccidioides brasiliensis is a temperature-dependent dimorphic fungus that cause paracoccidioidomycosis (PCM), the major systemic mycosis in Latin America. The capacity to evade the innate immune response of the host is due to P. brasiliensis ability to respond and to survive the nitrosative stress caused by phagocytic cells. However, the regulation of signal transduction pathways associated to nitrosative stress response are poorly understood. Ras GTPase play an important role in the various cellular events in many fungi. Ras, in its activated form (Ras-GTP), interacts with effector proteins and can initiate a kinase cascade. In this report, we investigated the role of Ras GTPase in P. brasiliensis after in vitro stimulus with nitric oxide (NO). We observed that low concentrations of NO induced cell proliferation in P. brasiliensis, while high concentrations promoted decrease in fungal viability, and both events were reversed in the presence of a NO scavenger. We observed that high levels of NO induced Ras activation and its S-nitrosylation. Additionally, we showed that Ras modulated the expression of antioxidant genes in response to nitrosative stress. We find that the Hog1 MAP kinase contributed to nitrosative stress response in P. brasiliensis in a Ras-dependent manner. Taken together, our data demonstrate the relationship between Ras-GTPase and Hog1 MAPK pathway allowing for the P. brasiliensis adaptation to nitrosative stress.
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Affiliation(s)
- Palloma Mendes Conceição
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Campus Diadema, SP, Brazil
| | - Alison Felipe Alencar Chaves
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil
| | - Marina Valente Navarro
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil
| | - Daniele Gonçalves Castilho
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil
| | - Juliana Cristina P Calado
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil
| | - Ana Eliza Coronel Janu Haniu
- Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil
| | - Patricia Xander
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Campus Diadema, SP, Brazil
| | - Wagner L Batista
- Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Campus Diadema, SP, Brazil; Department of Microbiology, Immunology and Parasitology, Escola Paulista de Medicina, Universidade Federal de São Paulo, SP, Brazil.
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Castilho DG, Chaves AFA, Navarro MV, Conceição PM, Ferreira KS, da Silva LS, Xander P, Batista WL. Secreted aspartyl proteinase (PbSap) contributes to the virulence of Paracoccidioides brasiliensis infection. PLoS Negl Trop Dis 2018; 12:e0006806. [PMID: 30260953 PMCID: PMC6177206 DOI: 10.1371/journal.pntd.0006806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 10/09/2018] [Accepted: 08/31/2018] [Indexed: 11/18/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is the most prevalent deep mycosis in Latin America and is caused by fungi from the Paracoccidioides genus. Virulence factors are important fungal characteristics that support the development of disease. Aspartyl proteases (Saps) are virulence factors in many human fungal pathogens that play an important role in the host invasion process. We report here that immunization with recombinant Sap from Paracoccidioides brasiliensis (rPbSap) imparted a protective effect in an experimental PCM model. The rPbSap-immunized mice had decreased fungal loads, and their lung parenchyma were notably preserved. An aspartyl protease inhibitor (pepstatin A) significantly decreased pulmonary injury and reduced fungal loads in the lung. Additionally, we observed that pepstatin A enhanced the fungicidal and phagocytic profile of macrophages against P. brasiliensis. Furthermore, PbSAP expression was highly altered by environmental conditions, including thermal stress, dimorphism switching and low pH. Hence, our data suggest that PbSap is an important virulence regulator in P. brasiliensis.
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Affiliation(s)
- Daniele Gonçalves Castilho
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Alison Felipe Alencar Chaves
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Marina Valente Navarro
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Palloma Mendes Conceição
- Department of Pharmaceutical Sciences, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Karen Spadari Ferreira
- Department of Pharmaceutical Sciences, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Luiz Severino da Silva
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Patricia Xander
- Department of Pharmaceutical Sciences, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
| | - Wagner Luiz Batista
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Department of Pharmaceutical Sciences, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, SP, Brazil
- * E-mail:
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Tashima AK, Castilho DG, Chaves AFA, Xander P, Zelanis A, Batista WL. Data in support of quantitative proteomics to identify potential virulence regulators in Paracoccidioides brasiliensis isolates. Data Brief 2015; 5:155-60. [PMID: 26501084 PMCID: PMC4588363 DOI: 10.1016/j.dib.2015.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 08/31/2015] [Accepted: 09/01/2015] [Indexed: 11/30/2022] Open
Abstract
Paracoccidioides genus are the etiologic agents of paracoccidioidomycosis (PCM), a systemic mycosis endemic in Latin America. Few virulence factors have been identified in these fungi. This paper describes support data from the quantitative proteomics of Paracoccidioides brasiliensis attenuated and virulent isolates [1]. The protein compositions of two isolates of the Pb18 strain showing distinct infection profiles were quantitatively assessed by stable isotopic dimethyl labeling and proteomic analysis. The mass spectrometry and the analysis dataset have been deposited to the ProteomeXchange Consortium via the PRIDE partner repository with identifier PXD000804.
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Affiliation(s)
- Alexandre Keiji Tashima
- Departamento de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Daniele Gonçalves Castilho
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Alison Felipe Alencar Chaves
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Patricia Xander
- Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Campus Diadema, Diadema, SP, Brazil
| | - André Zelanis
- Instituto de Ciência e Tecnologia, Universidade Federal de São Paulo, Campus São José dos Campos, Rua Talim, 330, São José dos Campos, SP, Brazil
| | - Wagner Luiz Batista
- Departamento de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil ; Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Campus Diadema, Diadema, SP, Brazil
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