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Intranasal Vaccine Using P10 Peptide Complexed within Chitosan Polymeric Nanoparticles as Experimental Therapy for Paracoccidioidomycosis in Murine Model. J Fungi (Basel) 2020; 6:jof6030160. [PMID: 32887256 PMCID: PMC7560165 DOI: 10.3390/jof6030160] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 08/22/2020] [Accepted: 08/25/2020] [Indexed: 02/08/2023] Open
Abstract
Paracoccidioidomycosis (PCM) is a granulomatous fungal disease caused by the dimorphic fungal species of Paracoccidioides, which mainly affects the lungs. Modern strategies for the treatment and/or prevention of PCM are based on a Th1-type immune response, which is important for controlling the disease. One of the most studied candidates for a vaccine is the P10 peptide, derived from the 43 kDa glycoprotein of Paracoccidioides brasiliensis. In order to improve its immune modulatory effect, the P10 peptide was associated with a chitosan-conjugated nanoparticle. The nanoparticles presented 220 nm medium size, poly dispersion index (PDI) below 0.5, zeta potential of +20 mV and encapsulation efficiency around 90%. The nanoparticles' non-toxicity was verified by hemolytic test and cell viability using murine macrophages. The nanoparticles were stable and presented physicochemical characteristics desirable for biological applications, reducing the fungal load and the usual standard concentration of the peptide from 4 to 20 times.
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Jannuzzi GP, Souza NDA, Françoso KS, Pereira RH, Santos RP, Kaihami GH, Almeida JRFD, Batista WL, Amaral AC, Maranhão AQ, Almeida SRD, Ferreira KS. Therapeutic treatment with scFv-PLGA nanoparticles decreases pulmonary fungal load in a murine model of paracoccidioidomycosis. Microbes Infect 2017; 20:48-56. [PMID: 28951317 DOI: 10.1016/j.micinf.2017.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 08/28/2017] [Accepted: 09/04/2017] [Indexed: 10/18/2022]
Abstract
Paracoccidioidomycosis (PCM) is a systemic mycosis with lymphatic dissemination that is caused by Paracoccidioides species. Treatment of PCM consists of chemotherapeutics such as itraconazole, trimethoprim, sulfamethoxazole or amphotericin B. However, several studies are aiming to develop therapeutic alternatives for the treatment of fungal infection using new molecules as adjuvants. The single-chain variable fragments (scFv) from an antibody that mimics the main fungal component incorporated within poly(lactide-co-glycolic) acid (PLGA) nanoparticles helped treat the fungal disease. After expressing the scFv in Picchia pastoris (P. pastoris), the recombinant molecules were coupled with PLGA, and the BALB/c mice were immunized before or after infection with yeast Paracoccidioides brasiliensis (P. brasiliensis). Our results showed decreased disease progression and decreased fungal burden. Taken together, our results showed an increased of IFN-γ and IL-12 cytokine production and an increased number of macrophages and dendritic cells in the pulmonary tissue of BALB/c mice treated with a high concentration of our molecule. Our data further confirm that the scFv plays an important role in the treatment of experimental PCM.
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Affiliation(s)
- Grasielle Pereira Jannuzzi
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Brazil
| | - Nicole de Araújo Souza
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Brazil
| | - Kátia Sanches Françoso
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Brazil
| | - Roney Henrique Pereira
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Brazil
| | - Raquel Possemozer Santos
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Brazil
| | | | | | - Wagner Luiz Batista
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Brazil
| | - André Corrêa Amaral
- Instituto de Patologia Tropical e Saúde Pública, Universidade Federal de Goiás, Goiânia, Brazil
| | | | - Sandro Rogério de Almeida
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Brazil
| | - Karen Spadari Ferreira
- Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Brazil.
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Holanda RA, Muñoz JE, Dias LS, Silva LBR, Santos JRA, Pagliari S, Vieira ÉLM, Paixão TA, Taborda CP, Santos DA, Bruña-Romero O. Recombinant vaccines of a CD4+ T-cell epitope promote efficient control of Paracoccidioides brasiliensis burden by restraining primary organ infection. PLoS Negl Trop Dis 2017; 11:e0005927. [PMID: 28938005 PMCID: PMC5627964 DOI: 10.1371/journal.pntd.0005927] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 10/04/2017] [Accepted: 09/02/2017] [Indexed: 11/19/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is an infectious disease endemic to South America, caused by the thermally dimorphic fungi Paracoccidioides. Currently, there is no effective human vaccine that can be used in prophylactic or therapeutic regimes. We tested the hypothesis that the immunogenicity of the immunodominant CD4+ T-cell epitope (P10) of Paracoccidioides brasiliensis gp43 antigen might be significantly enhanced by using a hepatitis B virus-derived particle (VLP) as an antigen carrier. This chimera was administered to mice as a (His)6-purified protein (rPbT) or a replication-deficient human type 5 adenoviral vector (rAdPbT) in an immunoprophylaxis assay. The highly virulent Pb18 yeast strain was used to challenge our vaccine candidates. Fungal challenge evoked robust P10-specific memory CD4+ T cells secreting protective Th-1 cytokines in most groups of immunized mice. Furthermore, the highest level of fungal burden control was achieved when rAdPbT was inoculated in a homologous prime-boost regimen, with 10-fold less CFU recovering than in non-vaccinated mice. Systemic Pb18 spreading was only prevented when rAdPbT was previously inoculated. In summary, we present here VLP/P10 formulations as vaccine candidates against PCM, some of which have demonstrated for the first time their ability to prevent progression of this pernicious fungal disease, which represents a significant social burden in developing countries.
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MESH Headings
- Animals
- Antigens, Fungal/immunology
- CD4-Positive T-Lymphocytes/immunology
- Cytokines/immunology
- Cytokines/metabolism
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Fungal Proteins/immunology
- Fungal Vaccines/administration & dosage
- Fungal Vaccines/immunology
- Glycoproteins/immunology
- Hepatitis B virus/genetics
- Immunization
- Immunodominant Epitopes/immunology
- Immunogenicity, Vaccine
- Immunologic Memory
- Liver/microbiology
- Lung/microbiology
- Mice, Inbred BALB C
- Paracoccidioides/growth & development
- Paracoccidioides/immunology
- Paracoccidioidomycosis/immunology
- Paracoccidioidomycosis/microbiology
- Paracoccidioidomycosis/prevention & control
- Spleen/microbiology
- Th1 Cells/immunology
- Vaccines, Synthetic/administration & dosage
- Vaccines, Synthetic/genetics
- Vaccines, Synthetic/immunology
- Vaccines, Virus-Like Particle/administration & dosage
- Vaccines, Virus-Like Particle/genetics
- Vaccines, Virus-Like Particle/immunology
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Affiliation(s)
- Rodrigo Assunção Holanda
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
- Laboratório de Biologia Parasitária, Universidade CEUMA, Maranhão, Brazil
- * E-mail:
| | - Julián Esteban Muñoz
- Departamento de Microbiologia, Universidade de São Paulo, São Paulo, Brazil
- Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - Lucas Santos Dias
- Departamento de Microbiologia, Universidade de São Paulo, São Paulo, Brazil
| | | | - Julliana Ribeiro Alves Santos
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
- Laboratório de Microbiologia Ambiental, Universidade CEUMA, Maranhão, Brazil
| | - Sthefany Pagliari
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
| | | | - Tatiane Alves Paixão
- Departamento de Patologia Geral, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | | | - Daniel Assis Santos
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
| | - Oscar Bruña-Romero
- Departamento de Microbiologia, Universidade Federal de Minas Gerais, Minas Gerais, Brazil
- Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Santa Catarina, Brazil
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Antifungal Resistance, Metabolic Routes as Drug Targets, and New Antifungal Agents: An Overview about Endemic Dimorphic Fungi. Mediators Inflamm 2017; 2017:9870679. [PMID: 28694566 PMCID: PMC5485324 DOI: 10.1155/2017/9870679] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 04/28/2017] [Accepted: 05/23/2017] [Indexed: 12/30/2022] Open
Abstract
Diseases caused by fungi can occur in healthy people, but immunocompromised patients are the major risk group for invasive fungal infections. Cases of fungal resistance and the difficulty of treatment make fungal infections a public health problem. This review explores mechanisms used by fungi to promote fungal resistance, such as the mutation or overexpression of drug targets, efflux and degradation systems, and pleiotropic drug responses. Alternative novel drug targets have been investigated; these include metabolic routes used by fungi during infection, such as trehalose and amino acid metabolism and mitochondrial proteins. An overview of new antifungal agents, including nanostructured antifungals, as well as of repositioning approaches is discussed. Studies focusing on the development of vaccines against antifungal diseases have increased in recent years, as these strategies can be applied in combination with antifungal therapy to prevent posttreatment sequelae. Studies focused on the development of a pan-fungal vaccine and antifungal drugs can improve the treatment of immunocompromised patients and reduce treatment costs.
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Mouse Immunization with Radioattenuated Yeast Cells of Paracoccidioides brasiliensis. Methods Mol Biol 2017. [PMID: 28584979 DOI: 10.1007/978-1-4939-7104-6_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Paracoccidioides brasiliensis is the agent of paracoccidioidomycosis, the most prevalent mycosis in Latin America, and currently there is no effective vaccine. The present chapter describes the methodology to obtain radioattenuated yeast cells of P. brasiliensis and a protocol to evaluate protective response elicited by this immunogen in experimental paracoccidioidomycosis. The radioattenuated yeast provides a valuable tool for immunological studies in experimental paracoccidioidomycosis and vaccine research.
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Jannuzzi GP, Tavares AHFP, Kaihami GH, de Almeida JRF, de Almeida SR, Ferreira KS. scFv from Antibody That Mimics gp43 Modulates the Cellular and Humoral Immune Responses during Experimental Paracoccidioidomycosis. PLoS One 2015; 10:e0129401. [PMID: 26091522 PMCID: PMC4474724 DOI: 10.1371/journal.pone.0129401] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 05/07/2015] [Indexed: 02/07/2023] Open
Abstract
Paracoccidioidomycosis (PCM), caused by Paracoccidioides species is a prevalent systemic and progressive mycosis that occurs in Latin America. It is caused by Paracoccidioides species. Immunization with dendritic cells transfected with a plasmid encoding the scFv (pMAC/PS-scFv) that mimics the main antigen of P. brasiliensis (gp43) confers protection in experimental PCM. DCs link innate and adaptive immunity by recognizing invading pathogens and selecting the type of effector T cell to mediate the immune response. Here, we showed that DC-pMAC/PS-scFv induces the activation of CD4+ and CD8+ T cells. Moreover, our results demonstrated that BALB/c mice infected with P. brasiliensis and treated with DC-pMAC/PS-scFv showed the induction of specific IgG production against gp43 and IFN-γ, IL-12 and IL-4 cytokines. Analysis of regional lymph nodes revealed increases in the expression of clec7a, myd88, tlr2, gata3 and tbx21, which are involved in the immune response. Taken together, our results indicate that the scFv modulates the humoral and cellular immune responses and presents epitopes to CD4+ and CD8+ T cells.
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Affiliation(s)
- Grasielle Pereira Jannuzzi
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | | | - Gilberto Hideo Kaihami
- Departamento de Química, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil
| | | | - Sandro Rogério de Almeida
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas da Universidade de São Paulo, São Paulo, Brazil
| | - Karen Spadari Ferreira
- Departamento de Ciências Biológicas do Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo, Diadema, Brazil
- * E-mail:
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Alegre-Maller ACP, Mendonça FC, da Silva TA, Oliveira AF, Freitas MS, Hanna ES, Almeida IC, Gay NJ, Roque-Barreira MC. Therapeutic administration of recombinant Paracoccin confers protection against paracoccidioides brasiliensis infection: involvement of TLRs. PLoS Negl Trop Dis 2014; 8:e3317. [PMID: 25474158 PMCID: PMC4256291 DOI: 10.1371/journal.pntd.0003317] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Accepted: 10/04/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Paracoccin (PCN) is an N-acetylglucosamine-binding lectin from the human pathogenic fungus Paracoccidioides brasiliensis. Recombinant PCN (rPCN) induces a T helper (Th) 1 immune response when prophylactically administered to BALB/c mice, protecting them against subsequent challenge with P. brasiliensis. In this study, we investigated the therapeutic effect of rPCN in experimental paracoccidioidomycosis (PCM) and the mechanism accounting for its beneficial action. METHODOLOGY/PRINCIPAL FINDINGS Four distinct regimens of rPCN administration were assayed to identify which was the most protective, relative to vehicle administration. In all rPCN-treated mice, pulmonary granulomas were less numerous and more compact. Moreover, fewer colony-forming units were recovered from the lungs of rPCN-treated mice. Although all therapeutic regimens of rPCN were protective, maximal efficacy was obtained with two subcutaneous injections of 0.5 µg rPCN at 3 and 10 days after infection. The rPCN treatment was also associated with higher pulmonary levels of IL-12, IFN-γ, TNF-α, nitric oxide (NO), and IL-10, without IL-4 augmentation. Encouraged by the pulmonary cytokine profile of treated mice and by the fact that in vitro rPCN-stimulated macrophages released high levels of IL-12, we investigated the interaction of rPCN with Toll-like receptors (TLRs). Using a reporter assay in transfected HEK293T cells, we verified that rPCN activated TLR2 and TLR4. The activation occurred independently of TLR2 heterodimerization with TLR1 or TLR6 and did not require the presence of the CD14 or CD36 co-receptors. The interaction between rPCN and TLR2 depended on carbohydrate recognition because it was affected by mutation of the receptor's N-glycosylation sites. The fourth TLR2 N-glycan was especially critical for the rPCN-TLR2 interaction. CONCLUSIONS/SIGNIFICANCE Based on our results, we propose that PCN acts as a TLR agonist. PCN binds to N-glycans on TLRs, triggers regulated Th1 immunity, and exerts a therapeutic effect against P. brasiliensis infection.
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Affiliation(s)
- Ana Claudia Paiva Alegre-Maller
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Flávia Costa Mendonça
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Thiago Aparecido da Silva
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Aline Ferreira Oliveira
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Mateus Silveira Freitas
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Ebert Seixas Hanna
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
| | - Igor C. Almeida
- Border Biomedical Research Center (BBRC), Department of Biological Sciences, University of Texas at El Paso, El Paso, Texas, United States of America
| | - Nicholas J. Gay
- Department of Biochemistry, Cambridge University, Cambridge, United Kingdom
| | - Maria Cristina Roque-Barreira
- Departamento de Biologia Celular e Molecular e Bioagentes Patogênicos, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, São Paulo, Brasil
- * E-mail: ,
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Travassos LR, Taborda CP. New advances in the development of a vaccine against paracoccidioidomycosis. Front Microbiol 2012; 3:212. [PMID: 22701452 PMCID: PMC3373149 DOI: 10.3389/fmicb.2012.00212] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Accepted: 05/24/2012] [Indexed: 11/22/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is an endemic Latin American mycosis caused by Paracoccidioides brasiliensis and also by the recently described P. lutzii. The systemic mycosis is the 10th leading cause of death due to infectious diseases in Brazil. As published, 1,853 patients died of PCM in the 1996–2006 decade in this country. The main diagnostic antigen of P.brasiliensis is the 43 kDa glycoprotein gp43, and its 15-mer peptide QTLIAIHTLAIRYAN, known as P10, contains the T-CD4+ epitope that elicits an IFN-γ-mediated Th1 immune response, which effectively treats mice intratracheally infected with PCM. The association of peptide P10 with antifungal drugs rendered an additive protective effect, even in immunosuppressed animals, being the basis of a recommended treatment protocol. Other immunotherapeutic tools include a peptide carrying a B cell epitope as well as protective anti-gp43 monoclonal antibodies. New delivery systems and gene therapy have been studied in prophylactic and therapeutic protocols to improve the efficacy of the recognized antigens aiming at a future vaccine as co-adjuvant therapy in patients with PCM.
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Affiliation(s)
- Luiz R Travassos
- Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, são Paulo, Brazil
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Fernandes VC, Martins EM, Boeloni JN, Coitinho JB, Serakides R, Goes AM. The combined use of Paracoccidioides brasiliensis Pb40 and Pb27 recombinant proteins enhances chemotherapy effects in experimental paracoccidioidomycosis. Microbes Infect 2011; 13:1062-72. [DOI: 10.1016/j.micinf.2011.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Revised: 05/20/2011] [Accepted: 06/09/2011] [Indexed: 11/16/2022]
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Cell-free antigens from Paracoccidioides brasiliensis drive IL-4 production and increase the severity of paracoccidioidomycosis. PLoS One 2011; 6:e21423. [PMID: 21731741 PMCID: PMC3120880 DOI: 10.1371/journal.pone.0021423] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2011] [Accepted: 05/30/2011] [Indexed: 11/19/2022] Open
Abstract
The thermally dimorphic fungus Paracoccidioides brasiliensis (Pb) is the causative agent of paracoccidioidomycosis (PCM), one of the most frequent systemic mycosis that affects the rural population in Latin America. PCM is characterized by a chronic inflammatory granulomatous reaction, which is consequence of a Th1-mediated adaptive immune response. In the present study we investigated the mechanisms involved in the immunoregulation triggered after a prior contact with cell-free antigens (CFA) during a murine model of PCM. The results showed that the inoculation of CFA prior to the infection resulted in disorganized granulomatous lesions and increased fungal replication in the lungs, liver and spleen, that paralleled with the higher levels of IL-4 when compared with the control group. The role of IL-4 in facilitating the fungal growth was demonstrated in IL-4-deficient- and neutralizing anti-IL-4 mAb-treated mice. The injection of CFA did not affect the fungal growth in these mice, which, in fact, exhibited a significant diminished amount of fungus in the tissues and smaller granulomas. Considering that in vivo anti-IL-4-application started one week after the CFA-inoculum, it implicates that IL-4-CFA-induced is responsible by the mediation of the observed unresponsiveness. Further, the characterization of CFA indicated that a proteic fraction is required for triggering the immunosuppressive mechanisms, while glycosylation or glycosphingolipids moieties are not. Taken together, our data suggest that the prior contact with soluble Pb antigens leads to severe PCM in an IL-4 dependent manner.
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de Souza Lacerda CM, Martins EMDN, de Resende MA, de Andrade ASR. Gamma Radiation Effects on Sporothrix schenckii Yeast Cells. Mycopathologia 2011; 171:395-401. [DOI: 10.1007/s11046-011-9395-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Accepted: 01/31/2011] [Indexed: 11/29/2022]
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do Nascimento Martins EM, Reis BS, de Resende MA, de Andrade ASR, Goes AM. Mice Immunization with Radioattenuated Yeast Cells of Paracoccidiodes brasiliensis: Influence of the Number of Immunizations. Mycopathologia 2009; 168:51-8. [DOI: 10.1007/s11046-009-9197-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Accepted: 03/24/2009] [Indexed: 11/30/2022]
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Paracoccidioides brasiliensis vaccine formulations based on the gp43-derived P10 sequence and the Salmonella enterica FliC flagellin. Infect Immun 2009; 77:1700-7. [PMID: 19204092 DOI: 10.1128/iai.01470-08] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is a systemic granulomatous disease caused by the dimorphic fungus Paracoccidioides brasiliensis. Anti-PCM vaccine formulations based on the secreted fungal cell wall protein (gp43) or the derived P10 sequence containing a CD4(+) T-cell-specific epitope have shown promising results. In the present study, we evaluated new anti-PCM vaccine formulations based on the intranasal administration of P. brasiliensis gp43 or the P10 peptide in combination with the Salmonella enterica FliC flagellin, an innate immunity agonist binding specifically to the Toll-like receptor 5, in a murine model. BALB/c mice immunized with gp43 developed high-specific-serum immunoglobulin G1 responses and enhanced interleukin-4 (IL-4) and IL-10 levels. On the other hand, mice immunized with recombinant purified flagellins genetically fused with P10 at the central hypervariable domain, either flanked or not by two lysine residues, or the synthetic P10 peptide admixed with purified FliC elicited a prevailing Th1-type immune response based on lung cell-secreted type 1 cytokines. Mice immunized with gp43 and FliC and intratracheally challenged with P. brasiliensis yeast cells had increased fungal proliferation and lung tissue damage. In contrast, mice immunized with the chimeric flagellins and particularly those immunized with P10 admixed with FliC reduced P. brasiliensis growth and lung damage. Altogether, these results indicate that S. enterica FliC flagellin modulates the immune response to P. brasiliensis P10 antigen and represents a promising alternative for the generation of anti-PCM vaccines.
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Reis B, Fernandes V, Martins E, Serakides R, Goes A. Protective immunity induced by rPb27 of Paracoccidioides brasiliensis. Vaccine 2008; 26:5461-9. [DOI: 10.1016/j.vaccine.2008.07.097] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 07/20/2008] [Accepted: 07/23/2008] [Indexed: 12/01/2022]
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