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Moura DMD, Carvalho AMRS, Brito RCFD, Roatt BM, Lage DP, Martins VT, Cruz LDR, Medeiros FAC, Batista SD, Pinheiro GRG, da Costa Rocha MO, Coelho EAF, Duarte MC, Mendes TADO, Menezes-Souza D. CD4 + and CD8 + T-cell multi-epitope chimeric protein associated with an MPLA adjuvant induce protective efficacy and long-term immunological memory for the immunoprophylaxis of American Tegumentary Leishmaniasis. Vaccine 2024; 42:126178. [PMID: 39096765 DOI: 10.1016/j.vaccine.2024.126178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/05/2024]
Abstract
American Tegumentary Leishmaniasis (ATL) is a disease of high severity and incidence in Brazil, in addition to being a worldwide concern in public health. Leishmania amazonensis is one of the etiological agents of ATL, and the inefficiency of control measures, associated with the high toxicity of the treatment and the lack of effective immunoprophylactic strategies, makes the development of vaccines indispensable and imminent. In this light, the present study proposes to elaborate a chimeric protein (rChiP), based on the fusion of multiple epitopes of CD4+/CD8+ T cells, identified in the immunoproteome of the parasites L. amazonensis and L. braziliensis. The designed chimeric protein was tested in the L. amazonensis murine model of infection using the following formulations: 25 μg of the rChiP in saline (rChiP group) and 25 μg of the rChiP plus 25 μg of MPLA-PHAD® (rChiP+MPLA group). After completing immunization, CD4+ and CD8+ T cells, stimulated with SLa-Antigen or rChiP, showed an increased production of nitric oxide and intracytoplasmic pro-inflammatory cytokines, in addition to the generation of central and effector memory T cells. rChiP and rChiP+MPLA formulations were able to promote an effective protection against L. amazonensis infection determined by a reduction in the development of skin lesions and lower parasitic burden. Reduction in the development of skin lesions and lower parasitic burden in the vaccinated groups were associated with an increase of nitrite, CD4+/CD8+IFN-γ+TNF-α+ and CD4+/CD8+CD44highCD62Lhigh/low T cells, IgGTotal, IgG2a, and lower rates of IgG1 and CD4+/CD8+IL-10+. This data suggests that proposed formulations could be considered potential tools to prevent ATL.
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Affiliation(s)
- Dênia Monteiro de Moura
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Ana Maria Ravena Severino Carvalho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Rory Cristiane Fortes de Brito
- Núcleo de Pesquisas em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, Minas Gerais, Brazil
| | - Bruno Mendes Roatt
- Núcleo de Pesquisas em Ciências Biológicas/NUPEB, Universidade Federal de Ouro Preto, Ouro Preto 35400-000, Minas Gerais, Brazil
| | - Daniela Pagliara Lage
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Vivian Tamietti Martins
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Luiza Dos Reis Cruz
- Laboratório de Química Orgânica Sintética, Instituto de Química, Universidade Estadual de Campinas, Campinas, 13083-970 São Paulo, Brazil
| | - Fernanda Alvarenga Cardoso Medeiros
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Sarah Dutra Batista
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Guilherme Rafael Gomide Pinheiro
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Manoel Otávio da Costa Rocha
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil
| | - Eduardo Antonio Ferraz Coelho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil; Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | - Mariana Costa Duarte
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil; Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil
| | | | - Daniel Menezes-Souza
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte 30130-100, Minas Gerais, Brazil; Departamento de Patologia Clínica, COLTEC, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil; Programa de Pós-Graduação em Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Minas Gerais, Brazil.
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Dias DS, Machado JM, Ribeiro PAF, Machado AS, Ramos FF, Nogueira LM, Gonçalves AAM, Ramos LDS, Gandra IB, Coutinho FS, dos Santos M, da Silva JO, Chávez-Fumagalli MA, Teixeira-Neto RG, Chaves AT, Campos-da-Paz M, Souza AA, Giunchetti RC, Freitas SM, Lyon S, de Magalhães-Soares DF, Silveira JAG, Silva ES, Coelho EAF, Galdino AS. rMELEISH: A Novel Recombinant Multiepitope-Based Protein Applied to the Serodiagnosis of Both Canine and Human Visceral Leishmaniasis. Pathogens 2023; 12:pathogens12020302. [PMID: 36839574 PMCID: PMC9958779 DOI: 10.3390/pathogens12020302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/08/2023] [Accepted: 02/09/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND visceral leishmaniasis (VL) is a critical public health problem in over ninety countries. The control measures adopted in Brazil have been insufficient when it comes to preventing the spread of this overlooked disease. In this context, a precise diagnosis of VL in dogs and humans could help to reduce the number of cases of this disease. Distinct studies for the diagnosis of VL have used single recombinant proteins in serological assays; however, the results have been variable, mainly in relation to the sensitivity of the antigens. In this context, the development of multiepitope-based proteins could be relevant to solving such problem. METHODS a chimeric protein (rMELEISH) was constructed based on amino acid sequences from kinesin 39 (k39), alpha-tubulin, and heat-shock proteins HSP70 and HSP 83.1, and tested in enzyme-linked immunosorbent (ELISA) for the detection of L. infantum infection using canine (n = 140) and human (n = 145) sera samples. RESULTS in the trials, rMELEISH was able to discriminate between VL cases and cross-reactive diseases and healthy samples, with sensitivity and specificity values of 100%, as compared to the use of a soluble Leishmania antigenic extract (SLA). CONCLUSIONS the preliminary data suggest that rMELEISH has the potential to be tested in future studies against a larger serological panel and in field conditions for the diagnosis of canine and human VL.
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Affiliation(s)
- Daniel Silva Dias
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Juliana Martins Machado
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Patrícia Aparecida Fernandes Ribeiro
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Amanda Sanchez Machado
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Fernanda Fonseca Ramos
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Lais Moreira Nogueira
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Ana Alice Maia Gonçalves
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Luana de Sousa Ramos
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Isadora Braga Gandra
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Flaviane Silva Coutinho
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Michelli dos Santos
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Jonatas Oliveira da Silva
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
| | - Miguel Angel Chávez-Fumagalli
- Computational Biology and Chemistry Research Group, Vicerrectorado de Investigación, Universidad Católica de Santa María, Urb. San José S/N, Arequipa 04000, Peru
| | - Rafael Gonçalves Teixeira-Neto
- Laboratório de Doenças Infecto-Parasitárias, Universidade Federal de São João Del-Rei, Divinópolis 35501-296, MG, Brazil
| | - Ana Thereza Chaves
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Mariana Campos-da-Paz
- Laboratório de Bioativos & Nanobiotecnologia, Universidade Federal de São João Del-Rei, Divinópolis 35501-296, MG, Brazil
| | - Amanda A. Souza
- Laboratório Nacional de Biociências (LNBio), Centro Nacional de Pesquisa em Energia e Materiais, Campinas 13083-970, SP, Brazil
| | - Rodolfo Cordeiro Giunchetti
- Laboratório de Biologia das Interações Celulares, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Sonia Maria Freitas
- Laboratorio de Biofísica, Instituto de Biologia, University of Brasilia, Brasília 70910-900, DF, Brazil
| | - Sandra Lyon
- Fundação Hospitalar do Estado de Minas Gerais, Hospital Eduardo de Menezes, Belo Horizonte 30622-020, MG, Brazil
| | | | - Julia Angelica Gonçalves Silveira
- Departamento de Medicina Veterinária Preventiva, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, MG, Brazil
| | - Eduardo Sergio Silva
- Laboratório de Doenças Infecto-Parasitárias, Universidade Federal de São João Del-Rei, Divinópolis 35501-296, MG, Brazil
| | - Eduardo Antonio Ferraz Coelho
- Programa de Pós-Graduação em Ciências da Saúde: Infectologia e Medicina Tropical, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Prof. Alfredo Balena, 190, Belo Horizonte 30130-100, MG, Brazil
| | - Alexsandro Sobreira Galdino
- Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei (UFSJ), Campus Centro Oeste, Divinópolis 35501-296, MG, Brazil
- Correspondence:
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An insight into differential protein abundance throughout Leishmania donovani promastigote growth and differentiation. Int Microbiol 2023; 26:25-42. [PMID: 35930160 PMCID: PMC9362617 DOI: 10.1007/s10123-022-00259-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 05/01/2022] [Accepted: 06/07/2022] [Indexed: 01/06/2023]
Abstract
Leishmania donovani causes anthroponotic visceral leishmaniasis, responsible for about 50,000 annual deaths worldwide. Current therapies have considerable side effects. Drug resistance has been reported and no vaccine is available nowadays. The development of undifferentiated promastigotes in the sand fly vector's gut leads to the promastigote form that is highly infective to the mammalian host. Fully differentiated promastigotes play a crucial role in the initial stages of mammalian host infection before internalization in the host phagocytic cell. Therefore, the study of protein levels in the promastigote stage is relevant for disease control, and proteomics analysis is an ideal source of vaccine candidate discovery. This study aims to get insight into the protein levels during the differentiation process of promastigotes by 2DE-MALDI-TOF/TOF. This partial proteome analysis has led to the identification of 75 proteins increased in at least one of the L. donovani promastigote differentiation and growth phases. This study has revealed the differential abundance of said proteins during growth and differentiation. According to previous studies, some are directly involved in parasite survival or are immunostimulatory. The parasite survival-related proteins are ascorbate peroxidase; cystathionine β synthase; an elongation factor 1β paralog; elongation factor 2; endoribonuclease L-PSP; an iron superoxide dismutase paralog; GDP-mannose pyrophosphorylase; several heat shock proteins-HSP70, HSP83-17, mHSP70-rel, HSP110; methylthioadenosine phosphorylase; two thiol-dependent reductase 1 paralogs; transitional endoplasmic reticulum ATPase; and the AhpC thioredoxin paralog. The confirmed immunostimulatory proteins are the heat shock proteins, enolase, and protein kinase C receptor analog. The potential immunostimulatory molecules according to findings in patogenic bacteria are fructose-1,6-diphophate aldolase, dihydrolipoamide acetyltransferase, isocitrate dehydrogenase, pyruvate dehydrogenase E1α and E1β subunits, and triosephosphate isomerase. These proteins may become disease control candidates through future intra-vector control methods or vaccines.
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Immunological characterization of rLdTCP1γ for its prophylactic potential against visceral leishmaniasis in hamster model. Mol Immunol 2021; 141:33-42. [PMID: 34798496 DOI: 10.1016/j.molimm.2021.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 11/01/2021] [Accepted: 11/07/2021] [Indexed: 11/22/2022]
Abstract
Visceral leishmaniasis (VL) is a chronic tropical disease responsible for devastating epidemics worldwide. Though current treatment relies on drugs, the emergence of resistance, toxic side-effects, and strenuous administration has led to an ineffective remedy. Hence, vaccination remains an alternative and desirable approach for VL control. Though extensive research on anti-leishmanial vaccine candidates has been carried out in past decades, presence of an effective molecule is still missing. In the present study, we have evaluated the immunogenicity and prophylactic potential of a recombinant T-complex protein-1 gamma subunit of L. donovani (rLdTCP1γ), against VL in hamster model. The antigen exhibited in vitro stimulation of lymphoproliferative and NO response in miltefosine and amphotericin B treated hamsters depicting its immunotherapeutic/immunogenic nature. Immunization with rLdTCP1γ revealed a strong protective response against experimental VL as indicated by reduced parasite load in the spleen of immunized group compared to infected control. The immunized animals gained body weight and exhibited significant reduction in the spleen and liver weight as compared to infected controls on days 60, 90, 120 post-challenge. A substantial augmentation of cell-mediated immune response as depicted by an increased lymphocyte proliferation, nitric oxide production, DTH responses and increased levels of IgG2 was observed in rLdTCP1γ immunized hamsters. The Th1 stimulatory potential, imparted by the antigen, was found to be intensified in the presence of adjuvant Bacillus Calmette-Guérin (BCG). The efficacy was further assisted by an upregulated mRNA transcript of Th1 induced cytokines (IL-12, IFN-γ and TNFα) and downregulation of IL-4 and IL-10. The results are thus suggestive of rLdTCP1γ having the potential of a strong vaccine candidate against VL.
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Corigliano MG, Sander VA, Sánchez López EF, Ramos Duarte VA, Mendoza Morales LF, Angel SO, Clemente M. Heat Shock Proteins 90 kDa: Immunomodulators and Adjuvants in Vaccine Design Against Infectious Diseases. Front Bioeng Biotechnol 2021; 8:622186. [PMID: 33553125 PMCID: PMC7855457 DOI: 10.3389/fbioe.2020.622186] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 12/15/2020] [Indexed: 02/03/2023] Open
Abstract
Heat shock proteins 90 kDa (Hsp90s) were originally identified as stress-responsive proteins and described to participate in several homeostatic processes. Additionally, extracellular Hsp90s have the ability to bind to surface receptors and activate cellular functions related to immune response (cytokine secretion, cell maturation, and antigen presentation), making them very attractive to be studied as immunomodulators. In this context, Hsp90s are proposed as new adjuvants in the design of novel vaccine formulations that require the induction of a cell-mediated immune response to prevent infectious diseases. In this review, we summarized the adjuvant properties of Hsp90s when they are either alone, complexed, or fused to a peptide to add light to the knowledge of Hsp90s as carriers and adjuvants in the design of vaccines against infectious diseases. Besides, we also discuss the mechanisms by which Hsp90s activate and modulate professional antigen-presenting cells.
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Affiliation(s)
- Mariana G Corigliano
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Valeria A Sander
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Edwin F Sánchez López
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Víctor A Ramos Duarte
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Luisa F Mendoza Morales
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Sergio O Angel
- Unidad Biotecnológica 2-UB2, Laboratorio de Parasitología Molecular, INTECH, UNSAM-CONICET, Chascomús, Argentina
| | - Marina Clemente
- Unidad Biotecnológica 6-UB6, Laboratorio de Molecular Farming y Vacunas, INTECH, UNSAM-CONICET, Chascomús, Argentina
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Sánchez-López EF, Corigliano MG, Albarracín RM, Sander VA, Legarralde A, Bengoa-Luoni SA, Clemente M. Plant Hsp90 is a novel adjuvant that elicits a strong humoral and cellular immune response against B- and T-cell epitopes of a Toxoplasma gondii SAG1 peptide. Parasit Vectors 2019; 12:140. [PMID: 30909938 PMCID: PMC6434815 DOI: 10.1186/s13071-019-3362-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 02/26/2019] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND The 90-kDa heat-shock protein (Hsp90) from Nicotiana benthamiana (NbHsp90.3) is a promising adjuvant, especially for those vaccines that require a T cell-mediated immune response. Toxoplasma gondii SAG1 is considered one of the most important antigens for the development of effective subunit vaccines. Some epitopes located in the SAG1 C-terminus region have showed a strong humoral and cellular immune response. In the present study, we aimed to assess the efficacy of NbHsp90.3 as carrier/adjuvant of SAG1-derived peptide (SAG1HC) in a T. gondii infection murine model. METHODS In the present study, C57BL/6 mice were intraperitoneal immunized with the NbHsp90.3-SAG1HC fusion protein (NbHsp90.3-SAG1HC group), mature SAG1 (SAG1m group), NbHsp90.3 (NbHsp90.3 group) or PBS buffer 1× (PBS group). The levels of IgG antibodies and the cytokine profile were determined by ELISA. Two weeks after the last immunization, all mice were orally challenged with 20 cysts of T. gondii Me49 strain and the number of brain cysts was determined. In addition, both humoral and cellular immune responses were also evaluated during the acute and chronic phase of T. gondii infection by ELISA. RESULTS The characterization of the immune response generated after vaccination with NbHsp90.3 as an adjuvant showed that NbHsp90.3-SAG1HC-immunized mice produced antibodies that were able to recognize not only rSAG1m but also the native SAG1 present in the total lysate antigen extract (SAG1TLA) from T. gondii tachyzoites, while control groups did not. Furthermore, anti-rSAG1m IgG2a/2b antibodies were significantly induced. In addition, only the spleen cell cultures from NbHsp90.3-SAG1HC-immunized mice showed a significantly increased production of IFN-γ. During the chronic phase of T. gondii infection, the antibodies generated by the infection were unable to detect the recombinant protein, but they did react with TLA extract. In addition, splenocytes from all groups showed a high production of IFN-γ when stimulated with rGRA4, but only those from NbHsp90.3-SAG1HC group stimulated with rSAG1m showed high production of IFN-γ. Finally, NbHsp90.3-SAG1HC-immunized mice exhibited a significant reduction in the cyst load (56%) against T. gondii infection. CONCLUSIONS We demonstrated that NbHsp90.3 enhances the humoral and cell-mediated immune response through a Th1 type cytokine production. Mice vaccinated with NbHsp90.3-SAG1HC exhibited a partial protection against T. gondii infection and it was correlated with the induction of memory immune response. We developed and validated a vaccine formulation which, to our knowledge, for the first time includes the NbHsp90.3 protein covalently fused to a peptide from T. gondii SAG1 protein that contains T- and B-cell epitopes.
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Affiliation(s)
- Edwin F. Sánchez-López
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Mariana G. Corigliano
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Romina M. Albarracín
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Valeria A. Sander
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Ariel Legarralde
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Sofía A. Bengoa-Luoni
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
| | - Marina Clemente
- Unidad de Biotecnología 6-UB6, IIB-INTECH, CONICET-UNSAM, Intendente Marino Km 8.2, B7130IWA Chascomús, Buenos Aires Province Argentina
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Klug B, Celis P, Ruepp R, Robertson JS. EU regulatory guidelines for the clinical evaluation of adjuvants. ACTA ACUST UNITED AC 2015. [DOI: 10.3109/10601333.2015.1001899] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Jaiswal AK, Khare P, Joshi S, Kushawaha PK, Sundar S, Dube A. Th1 stimulatory proteins of Leishmania donovani: comparative cellular and protective responses of rTriose phosphate isomerase, rProtein disulfide isomerase and rElongation factor-2 in combination with rHSP70 against visceral leishmaniasis. PLoS One 2014; 9:e108556. [PMID: 25268700 PMCID: PMC4182492 DOI: 10.1371/journal.pone.0108556] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 08/29/2014] [Indexed: 11/25/2022] Open
Abstract
In visceral leishmaniasis, the recovery from the disease is always associated with the generation of Th1-type of cellular responses. Based on this, we have previously identified several Th1-stimulatory proteins of Leishmania donovani -triose phosphate isomerase (TPI), protein disulfide isomerase (PDI) and elongation factor-2 (EL-2) etc. including heat shock protein 70 (HSP70) which induced Th1-type of cellular responses in both cured Leishmania patients/hamsters. Since, HSPs, being the logical targets for vaccines aimed at augmenting cellular immunity and can be early targets in the immune response against intracellular pathogens; they could be exploited as vaccine/adjuvant to induce long-term immunity more effectively. Therefore, in this study, we checked whether HSP70 can further enhance the immunogenicity and protective responses of the above said Th1-stimulatory proteins. Since, in most of the studies, immunogenicity of HSP70 of L. donovani was assessed in native condition, herein we generated recombinant HSP70 and tested its potential to stimulate immune responses in lymphocytes of cured Leishmania infected hamsters as well as in the peripheral blood mononuclear cells (PBMCs) of cured patients of VL either individually or in combination with above mentioned recombinant proteins. rLdHSP70 alone elicited strong cellular responses along with remarkable up-regulation of IFN-γ and IL-12 cytokines and extremely lower level of IL-4 and IL-10. Among the various combinations, rLdHSP70 + rLdPDI emerged as superior one augmenting improved cellular responses followed by rLdHSP70 + rLdEL-2. These combinations were further evaluated for its protective potential wherein rLdHSP70 + rLdPDI again conferred utmost protection (∼80%) followed by rLdHSP70 + rLdEL-2 (∼75%) and generated a strong cellular immune response with significant increase in the levels of iNOS transcript as well as IFN-γ and IL-12 cytokines which was further supported by the high level of IgG2 antibody in vaccinated animals. These observations indicated that vaccine(s) based on combination of HSP70 with Th1-stimulatory protein(s) may be a viable proposition against intracellular pathogens.
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Affiliation(s)
- Anil Kumar Jaiswal
- Division of Parasitology, CSIR-Central Drug Research Institute, Lucknow, India
| | - Prashant Khare
- Division of Parasitology, CSIR-Central Drug Research Institute, Lucknow, India
| | - Sumit Joshi
- Division of Parasitology, CSIR-Central Drug Research Institute, Lucknow, India
| | | | - Shyam Sundar
- Department of Medicine, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
| | - Anuradha Dube
- Division of Parasitology, CSIR-Central Drug Research Institute, Lucknow, India
- * E-mail:
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9
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Corigliano MG, Fenoy I, Sander V, Maglioco A, Goldman A, Clemente M. Plant heat shock protein 90 as carrier-adjuvant for immunization against a reporter antigen. Vaccine 2013; 31:5872-8. [PMID: 24120680 DOI: 10.1016/j.vaccine.2013.09.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/31/2013] [Accepted: 09/23/2013] [Indexed: 02/04/2023]
Abstract
Here, we evaluated the modulation of the immune response induced by Hsp90 of Nicotiana benthamiana (NbHsp90.3) against the Maltose Binding Protein (MBP) as a reporter antigen. Equimolar quantities of recombinant proteins were administered in mice as follows: MBP alone (MBP group), a mixture of MBP and rNbHsp90.3 (MBP+rNbHsp90.3 group) and the fusion of MBP to rNbHsp90.3 (MBP-rNbHsp90.3 group). The covalent linkage between NbHsp90.3 and MBP to bring a fusion protein was essential to induce the strong specific antibody response with predominance of IgG2a. Eighty-four days after the first immunization, splenocyte proliferation from MBP-rNbHsp90.3-immunized mice was consistently higher than that from MBP and MBP+rNbHsp90.3 groups. In addition, splenocytes from MBP-rNbHsp90.3 immunized mice produced higher levels of IFN-γ than controls. Finally, both formulations with rNbHsp90.3 significantly enhanced the MHC class I expression levels, but only rNbHsp90.3 covalent bound to MBP induced a specific cellular immune response against MBP measured as increased percentage of CD8(+) T cells. Taken together, these results suggest that plant HSP90s could be incorporated as adjuvants in vaccines that require the generation of a Th1 response along with a CD8 cytotoxic cell response to confer immunity.
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Affiliation(s)
- Mariana G Corigliano
- Laboratorio de Biotecnología Vegetal, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
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10
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Abánades DR, Arruda LV, Arruda ES, Pinto JRAS, Palma MS, Aquino D, Caldas AJ, Soto M, Barral A, Barral-Netto M. Immunodominant antigens of Leishmania chagasi associated with protection against human visceral leishmaniasis. PLoS Negl Trop Dis 2012; 6:e1687. [PMID: 22724032 PMCID: PMC3378602 DOI: 10.1371/journal.pntd.0001687] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 04/30/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Protection and recovery from visceral leishmaniasis (VL) have been associated with cell-mediated immune (CMI) responses, whereas no protective role has been attributed to humoral responses against specific parasitic antigens. In this report, we compared carefully selected groups of individuals with distinct responses to Leishmania chagasi to explore antigen-recognizing IgG present in resistant individuals. METHODOLOGY AND PRINCIPAL FINDINGS VL patients with negative delayed-type hypersensitivity (DTH) were classified into the susceptible group. Individuals who had recovered from VL and converted to a DTH+ response, as well as asymptomatic infected individuals (DTH+), were categorized into the resistant group. Sera from these groups were used to detect antigens from L. chagasi by conventional and 2D Western blot assays. Despite an overall reduction in the reactivity of several proteins after DTH conversion, a specific group of proteins (approximately 110-130 kDa) consistently reacted with sera from DTH converters. Other antigens that specifically reacted with sera from DTH+ individuals were isolated and tandem mass spectrometry followed by database query with the protein search engine MASCO were used to identify antigens. The serological properties of recombinant version of the selected antigens were tested by ELISA. Sera from asymptomatic infected people (DTH+) reacted more strongly with a mixture of selected recombinant antigens than with total soluble Leishmania antigen (SLA), with less cross-reactivity against Chagas disease patients' sera. SIGNIFICANCE Our results are the first evidence of leishmania proteins that are specifically recognized by sera from individuals who are putatively resistant to VL. In addition, these data highlight the possibility of using specific proteins in serological tests for the identification of asymptomatic infected individuals.
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Affiliation(s)
- Daniel R. Abánades
- Centro de Pesquisas Gonçalo Moniz (CPqGM), Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
| | - Leonardo V. Arruda
- Centro de Pesquisas Gonçalo Moniz (CPqGM), Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Elaine S. Arruda
- Centro de Pesquisas Gonçalo Moniz (CPqGM), Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
| | - José Roberto A. S. Pinto
- Center of the Study of Social Insects, Institute of Biosciences of Rio Claro, Department of Biology, University of São Paulo State (UNESP), Rio Claro, São Paulo, Brazil
| | - Mario S. Palma
- Center of the Study of Social Insects, Institute of Biosciences of Rio Claro, Department of Biology, University of São Paulo State (UNESP), Rio Claro, São Paulo, Brazil
| | - Dorlene Aquino
- Departamento de Enfermagem, Universidade Federal do Maranhão, São Luis, Maranhão, Brazil
| | - Arlene J. Caldas
- Departamento de Enfermagem, Universidade Federal do Maranhão, São Luis, Maranhão, Brazil
| | - Manuel Soto
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Departamento de Biología Molecular, Universidad Autónoma de Madrid, Madrid, Spain
| | - Aldina Barral
- Centro de Pesquisas Gonçalo Moniz (CPqGM), Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia de Investigação em Imunologia (iii-INCT), Salvador, Bahia, Brazil
| | - Manoel Barral-Netto
- Centro de Pesquisas Gonçalo Moniz (CPqGM), Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Bahia, Brazil
- Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia de Investigação em Imunologia (iii-INCT), Salvador, Bahia, Brazil
- * E-mail:
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11
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Xiaoxia Z, Weihua N, Qingyong Z, Fengli W, Yingying L, Xiaxia S, Zhonghui L, Guixiang T. Maltose-binding protein isolated from Escherichia coli induces Toll-like receptor 2-mediated viability in U937 cells. Clin Transl Oncol 2011; 13:509-18. [PMID: 21775279 DOI: 10.1007/s12094-011-0689-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND Stimulation of Toll-like receptors (TLRs) by microbial products has been utilised to potentiate immune responses against haematologic malignancies. The maltose-binding protein (MBP) of Escherichia coli could induce the activation of immune cells via TLR4. The aim of the present study was to investigate whether TLRs mediated the biological effects of MBP on U937 and Jurkat cells in vitro. METHODS We observed the effect of MBP on U937 and Jurkat cells by using the WST, cell cycle analysis and morphological observation. Further, cells were stimulated with MBP for indicated times and doses, and detected by RT-PCR, western blotting, immunohistochemistry and immunofluorescence staining to investigate the mechanisms involved in cell viability. RESULTS MBP enhanced the viability of U937 and Jurkat cells, and the effects were blocked by anti-TLR2, but not anti-TLR4 in U937 cells. Further studies confirmed that MBP was able to directly bind to U937 and Jurkat cells and modulate TLR expression. The effects of MBP depended on the activation of NF-κB and MAP kinase in U937 and Jurkat cells. CONCLUSIONS Our results demonstrated that MBP could directly promote U937 cell viability via TLR2. It suggested that MBP may be used as an adjuvant for participating in the immunotherapy of haematologic malignancies.
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Affiliation(s)
- Zhao Xiaoxia
- Department of Immunology, Jilin University, 2 Xinmin Avenue, Changchun, Ji Lin 130021, People's Republic of China
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12
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Kaur J, Kaur T, Kaur S. Studies on the protective efficacy and immunogenicity of Hsp70 and Hsp83 based vaccine formulations in Leishmania donovani infected BALB/c mice. Acta Trop 2011; 119:50-6. [PMID: 21530477 DOI: 10.1016/j.actatropica.2011.04.007] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2010] [Revised: 03/25/2011] [Accepted: 04/07/2011] [Indexed: 11/28/2022]
Abstract
Visceral leishmaniasis, a chronic systemic infection, is the major cause of morbidity and mortality in many parts of world. The current drugs for the treatment of leishmaniasis are toxic, expensive, difficult to administer and becoming ineffective due to the emergence of drug resistance. In the absence of effective treatment, vaccination remains the only hope for control of the disease. We have evaluated the protective efficacy of two heat shock proteins (Hsp70 and Hsp83) in combination with two different adjuvants (MPLA and ALD) in Leishmania donovani infected inbred BALB/c mice. The proteins were isolated by SDS-PAGE and the mice were immunized subcutaneously with Hsp70+Hsp83, Hsp70+Hsp83+ALD and Hsp70+Hsp83+MPLA. These were challenged with 10(7) promastigotes of L. donovani. The animals were sacrificed on 30, 60 and 90 days post challenge for the assessment of parasite load and generation of cellular and humoral immune responses. The vaccines induced a strong protective response against experimental visceral leishmaniasis as shown by reduced parasite load in liver of all immunized groups as compared to the infected controls. The vaccines also led to the augmentation of DTH responses, increased levels of IgG2a, IFN-γ and IL-2. Both the adjuvants raised significantly the level of protection imparted by the proteins but MPLA was more effective in comparison to ALD.
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MESH Headings
- Adjuvants, Immunologic/pharmacology
- Adjuvants, Immunologic/therapeutic use
- Animals
- Antibodies, Protozoan/blood
- Antigens, Protozoan/immunology
- Cytokines/blood
- Disease Models, Animal
- HSP70 Heat-Shock Proteins/immunology
- HSP70 Heat-Shock Proteins/therapeutic use
- Hypersensitivity, Delayed/chemically induced
- Hypersensitivity, Delayed/immunology
- Immunity, Humoral
- Leishmania donovani/immunology
- Leishmaniasis Vaccines/administration & dosage
- Leishmaniasis Vaccines/immunology
- Leishmaniasis, Visceral/immunology
- Leishmaniasis, Visceral/prevention & control
- Lipid A/analogs & derivatives
- Lipid A/pharmacology
- Liver/parasitology
- Mice
- Mice, Inbred BALB C
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Affiliation(s)
- Jaspreet Kaur
- Department of Zoology, Panjab University, Chandigarh 160014, India.
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13
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Corigliano MG, Maglioco A, Laguía Becher M, Goldman A, Martín V, Angel SO, Clemente M. Plant Hsp90 proteins interact with B-cells and stimulate their proliferation. PLoS One 2011; 6:e21231. [PMID: 21701588 PMCID: PMC3118808 DOI: 10.1371/journal.pone.0021231] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 05/24/2011] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND The molecular chaperone heat shock protein 90 (Hsp90) plays an important role in folding stabilization and activation of client proteins. Besides, Hsp90 of mammals and mammalian pathogens displays immunostimulatory properties. Here, we investigated the role of plant-derived Hsp90s as B-cell mitogens by measuring their proliferative responses in vitro. METHODOLOGY Plant cytosolic Hsp90 isoforms from Arabidopsis thaliana (AtHsp81.2) and Nicotiana benthamiana (NbHsp90.3) were expressed in E. coli. Over-expression of recombinant plant Hsp90s (rpHsp90s) was confirmed by SDS-PAGE and western blot using and anti-AtHsp81.2 polyclonal anti-body. Both recombinant proteins were purified by Ni-NTA affinity chromatography and their identity confirmed by MALDI-TOF-TOF. Recombinant AtHsp81.2 and NbHsp90.3 proteins induced prominent proliferative responses in spleen cells form BALB/c mice. Polymyxin-B, a potent inhibitor of lipopolysaccharide (LPS), did not eliminate the rpHsp90-induced proliferation. In addition, in vitro incubation of spleen cells with rpHsp90 led to the expansion of CD19-bearing populations, suggesting a direct effect of these proteins on B lymphocytes. This effect was confirmed by immunofluorescence analysis, where a direct binding of rpHsp90 to B- but not to T-cells was observed in cells from BALB/c and C3H/HeN mice. Finally, we examined the involvement of Toll Like Receptor 4 (TLR4) molecules in the rpHsp90s induction of B-cell proliferation. Spleen cells from C3H/HeJ mice, which carry a point mutation in the cytoplasmic region of TLR4, responded poorly to prAtHsp90. However, the interaction between rpHsp90 and B-cells from C3H/HeJ mice was not altered, suggesting that the mutation on TLR4 would be affecting the signal cascade but not the rpHsp90-TLR4 receptor interaction. CONCLUSIONS Our results show for the first time that spleen cell proliferation can be stimulated by a non-pathogen-derived Hsp90. Furthermore, our data provide a new example of a non-pathogen-derived ligand for TLRs.
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Affiliation(s)
- Mariana G. Corigliano
- Laboratorio de Biotecnología Vegetal, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
| | - Andrea Maglioco
- Instituto de Leucemia Experimental (ILEX)-CONICET, Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Melina Laguía Becher
- Laboratorio de Biotecnología Vegetal, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
| | - Alejandra Goldman
- CESyMA, Escuela de Ciencia y Tecnología, UNSAM, San Martín, Argentina
| | - Valentina Martín
- CESyMA, Escuela de Ciencia y Tecnología, UNSAM, San Martín, Argentina
| | - Sergio O. Angel
- Laboratorio de Parasitología Molecular, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
| | - Marina Clemente
- Laboratorio de Biotecnología Vegetal, IIB-INTECH, CONICET-UNSAM, Chascomús, Provincia de Buenos Aires, Argentina
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14
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Soto M, Ramírez L, Pineda MA, González VM, Entringer PF, de Oliveira CI, Nascimento IP, Souza AP, Corvo L, Alonso C, Bonay P, Brodskyn C, Barral A, Barral-Netto M, Iborra S. Searching Genes Encoding Leishmania Antigens for Diagnosis and Protection. ACTA ACUST UNITED AC 2009. [DOI: 10.3814/2009/173039] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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15
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Barhoumi M, Tanner NK, Banroques J, Linder P, Guizani I. Leishmania infantum LeIF protein is an ATP-dependent RNA helicase and an eIF4A-like factor that inhibits translation in yeast. FEBS J 2006; 273:5086-100. [PMID: 17087726 DOI: 10.1111/j.1742-4658.2006.05506.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
LeIF, a Leishmania protein similar to the eukaryotic initiation factor eIF4A, which is a prototype of the DEAD box protein family, was originally described as a Th1-type natural adjuvant and as an antigen that induces an IL12-mediated Th1 response in the peripheral blood mononuclear cells of leishmaniasis patients. This study aims to characterize this protein by comparative biochemical and genetic analysis with eIF4A in order to assess its potential as a target for drug development. We show that a His-tagged, recombinant, LeIF protein of Leishmania infantum, which was purified from Escherichia coli, is both an RNA-dependent ATPase and an ATP-dependent RNA helicase in vitro, as described previously for other members of the DEAD box helicase protein family. In vivo experiments show that the LeIF gene cannot complement the deletion of the essential TIF1 and TIF2 genes in the yeast Saccharomyces cerevisiae that encode eIF4A. In contrast, expression of LeIF inhibits yeast growth when endogenous eIF4A is expressed off only one of its two encoding genes. Furthermore, in vitro binding assays show that LeIF interacts with yeast eIF4G. These results show an unproductive interaction of LeIF with translation initiation factors in yeast. Furthermore, the 25 amino terminal residues were shown to enhance the ability of LeIF to interfere with the translation machinery in yeast.
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Affiliation(s)
- Mourad Barhoumi
- Laboratoire d'Epidémiologie et d'Ecologie Parasitaire, Institut Pasteur de Tunis, Tunisia
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16
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Pokorná D, Macková J, Dusková M, Rittich S, Ludvíková V, Smahel M. Combined immunization with fusion genes of mutated E7 gene of human papillomavirus type 16 did not enhance antitumor effect. J Gene Med 2005; 7:696-707. [PMID: 15712328 DOI: 10.1002/jgm.733] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND The E7 oncoprotein of human papillomavirus type 16 (HPV16) is frequently used as a model tumor-associated antigen. Its immunogenicity has been substantially enhanced by fusion with several proteins of various origins and functions. Different mechanisms have been responsible for increased vaccination efficacy of fusion proteins. METHODS AND RESULTS We linked E7 and its mutated form (E7GGG) with the mouse heat-shock protein 70.1 (HSP70.1). Enhanced immunogenicity of both fusion genes administered via a gene gun was demonstrated by protection of C57BL/6 mice against oncogenic MHC class I positive TC-1 cells producing the HPV16 E7 oncoprotein but not against the MHC class I negative TC-1/A9 subline. To assess if the efficacy of E7-based DNA vaccines could be increased by combination of various fusion genes, we combined the HSP70.1 fusion genes (i.e. E7HSP or E7GGGHSP) with the fusion construct linking E7GGG with targeting signals of lysosome-associated membrane protein 1 (Sig/E7GGG/LAMP-1). Treatment of mice 4 days after TC-1 cell inoculation showed moderately higher immunization potency of HSP70.1 fusion genes in comparison with the Sig/E7GGG/LAMP-1 gene. Any combination of two fusion genes given in the same gene gun shot neither was more effective compared with single genes nor protected mice against TC-1/A9 cells. As fusion of E7GGG with E. coli glucuronidase (E7GGG.GUS) had been previously proven to provide partial protection from TC-1/A9-induced tumors, we also combined E7GGGHSP with E7GGG.GUS. The genes were inoculated either in mix in two gene gun shots or separately each gene in one shot into opposite sides of the abdomen. Neither mode of combined immunization induced higher protection than E7GGG.GUS alone. However, doubling the DNA dose considerably enhanced the antitumor efficacy of E7GGG.GUS. CONCLUSIONS We constructed highly immunogenic fusions of HPV16 E7 and E7GGG with mouse HSP70.1. Furthermore, we substantially enhanced protection against TC-1/A9 cells with downregulated MHC class I expression by doubling the pBSC/E7GGG.GUS dose, but we failed to demonstrate a beneficial effect of any combination of two fusion genes with different mechanisms causing enhancement of HPV16 E7 immunogenicity.
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MESH Headings
- Animals
- Antigens, Neoplasm/immunology
- Biolistics
- Cell Line, Transformed
- Cell Line, Tumor
- Cell Transformation, Viral
- Female
- HSP70 Heat-Shock Proteins/immunology
- Immunization
- Injections, Subcutaneous
- Lung Neoplasms/pathology
- Mice
- Mice, Inbred C57BL
- Mutation
- NIH 3T3 Cells
- Neoplasms, Experimental/prevention & control
- Oncogene Proteins, Viral/genetics
- Oncogene Proteins, Viral/immunology
- Papillomaviridae/genetics
- Papillomaviridae/immunology
- Papillomavirus E7 Proteins
- Plasmids
- Time Factors
- Tumor Virus Infections/prevention & control
- Vaccination
- Vaccines, DNA/immunology
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Affiliation(s)
- Dana Pokorná
- Institute of Hematology and Blood Transfusion, Department of Experimental Virology, U Nemocnice 1, 128 20 Prague 2, Czech Republic.
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17
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Campbell K, Diao H, Ji J, Soong L. DNA immunization with the gene encoding P4 nuclease of Leishmania amazonensis protects mice against cutaneous Leishmaniasis. Infect Immun 2003; 71:6270-8. [PMID: 14573646 PMCID: PMC219588 DOI: 10.1128/iai.71.11.6270-6278.2003] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2003] [Revised: 07/04/2003] [Accepted: 08/08/2003] [Indexed: 11/20/2022] Open
Abstract
Infection with the protozoan parasite Leishmania amazonensis can cause diverse clinical forms of leishmaniasis. Immunization with purified P4 nuclease protein has been shown to elicit a protective response in mice challenged with L. amazonensis and L. pifanoi. To explore the potential of a DNA-based vaccine, we tested the L. amazonensis gene encoding P4 nuclease as well as adjuvant constructs encoding murine interleukin-12 (IL-12) and L. amazonensis HSP70. Susceptible BALB/c mice were immunized with the DNA encoding P4 alone, P4/IL-12, or P4/HSP70 prior to challenge with L. amazonensis promastigotes. Mice given P4/IL-12 exhibited no lesion development and had a 3- to 4-log reduction in tissue parasite burdens compared to controls. This protection corresponded to significant increases in gamma interferon and tumor necrosis factor alpha production and a reduction in parasite-specific immunoglobulin G1, suggesting an enhancement in Th1 responses. Moreover, we immunized mice with the L. amazonensis vaccines to determine if this vaccine regimen could provide cross-protection against a genetically diverse species, L. major. While the P4/HSP70 vaccine led to self-healing lesions, the P4/IL-12 vaccine provided negligible protection against L. major infection. This is the first report of successful use of a DNA vaccine to induce protection against L. amazonensis infection. Additionally, our results indicate that different vaccine combinations, including DNA encoding P4, HSP70, or IL-12, can provide significant protection against both Old World and New World cutaneous leishmaniasis.
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Affiliation(s)
- Kimberly Campbell
- Departments of Microbiology and Immunology, Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas 77555-1070, USA
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