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Mendonça VRR, Andrade BB, Souza LCL, Magalhães BML, Mourão MPG, Lacerda MVG, Barral-Netto M. Unravelling the patterns of host immune responses in Plasmodium vivax malaria and dengue co-infection. Malar J 2015; 14:315. [PMID: 26271921 PMCID: PMC4536664 DOI: 10.1186/s12936-015-0835-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 08/04/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Concurrent malaria and dengue infection is frequently diagnosed in endemic countries, but its immunopathology remains largely unknown. In the present study, a large panel of cytokines/chemokines and clinical laboratory markers were measured in patients with Plasmodium vivax and dengue co-infection as well as in individuals with malaria or dengue mono-infections in order to identify biosignatures of each clinical condition. METHODS Individuals from the Brazilian Amazon were recruited between 2009 and 2013 and classified in three groups: vivax malaria (n = 52), dengue (n = 30) and vivax malaria and dengue co-infection (n = 30). P. vivax malaria was diagnosed by thick blood smear and confirmed by PCR; dengue cases were detected by IgM ELISA or NS1 protein. The plasma levels of cytokines and chemokines were determined by multiplex assay. RESULTS Individuals with malaria and dengue co-infection displayed lower levels of platelets and haemoglobin than those with malaria or dengue mono-infections (p = 0.0047 and p = 0.0001, respectively). The group of individuals co-infected exhibited the highest median concentrations of IFN-γ, IL-6, CCL4 than the mono-infected groups. Network analyses of plasma cytokines/chemokines revealed that malaria and dengue co-infection exhibits a distinct immune profile with critical roles for TNF, IL-6 and IFN-γ. Further, parasitaemia levels displayed positive significant interactions with IL-6, CCL4 and IL-10 in the group of patients co-infected with malaria and dengue. No differences were observed in distribution of dengue virus serotypes and Plasmodium parasitaemia levels between the groups. CONCLUSIONS The findings described here identify unique patterns of circulating immunological markers in cases of malaria and dengue co-infection and provide insights on the immunopathology of this co-morbid condition.
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Affiliation(s)
- Vitor R R Mendonça
- Laboratório Integrado de Microbiogia e Imunoregulação (LIMI), Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil. .,Faculdade de Medicina, Universidade Federal da Bahia, Salvador, Brazil.
| | - Bruno B Andrade
- Laboratório Integrado de Microbiogia e Imunoregulação (LIMI), Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil.
| | - Ligia C L Souza
- Laboratório Integrado de Microbiogia e Imunoregulação (LIMI), Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil. .,Faculdade de Medicina, Universidade Federal da Bahia, Salvador, Brazil.
| | - Belisa M L Magalhães
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil. .,Universidade do Estado do Amazonas, Manaus, Brazil.
| | - Maria P G Mourão
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil. .,Universidade do Estado do Amazonas, Manaus, Brazil.
| | - Marcus V G Lacerda
- Fundação de Medicina Tropical Dr. Heitor Vieira Dourado, Manaus, Brazil. .,Universidade do Estado do Amazonas, Manaus, Brazil.
| | - Manoel Barral-Netto
- Laboratório Integrado de Microbiogia e Imunoregulação (LIMI), Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Salvador, Brazil. .,Faculdade de Medicina, Universidade Federal da Bahia, Salvador, Brazil. .,Instituto de Investigação em Imunologia, Instituto Nacional de Ciência e Tecnologia, São Paulo, Brazil.
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Recombinant dengue 2 virus NS3 protein conserves structural antigenic and immunological properties relevant for dengue vaccine design. Virus Genes 2014; 49:185-95. [PMID: 24854144 DOI: 10.1007/s11262-014-1087-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 05/08/2014] [Indexed: 12/28/2022]
Abstract
The NS3 protein is a multifunctional non-structural protein of flaviviruses implicated in the polyprotein processing. The predominance of cytotoxic T cell lymphocytes epitopes on the NS3 protein suggests a protective role of this protein in limiting virus replication. In this work, we studied the antigenicity and immunogenicity of a recombinant NS3 protein of the Dengue virus 2. The full-length NS3 gene was cloned and expressed as a His-tagged fusion protein in Escherichia coli. The pNS3 protein was purified by two chromatography steps. The recombinant NS3 protein was recognized by anti-protease NS3 polyclonal antibody and anti-DENV2 HMAF by Western Blot. This purified protein was able to stimulate the secretion of high levels of gamma interferon and low levels of interleukin-10 and tumor necrosis factor-α in mice splenocytes, suggesting a predominantly Th-1-type T cell response. Immunized BALB/c mice with the purified NS3 protein showed a strong induction of anti-NS3 IgG antibodies, essentially IgG2b, as determined by ELISA. Immunized mice sera with recombinant NS3 protein showed specific recognition of native dengue protein by Western blotting and immunofluorescence techniques. The successfully purified recombinant protein was able to preserv the structural and antigenic determinants of the native dengue protein. The antigenicity shown by the recombinant NS3 protein suggests its possible inclusion into future DENV vaccine preparations.
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Valdés I, Bernardo L, Gil L, Pavón A, Lazo L, López C, Romero Y, Menendez I, Falcón V, Betancourt L, Martín J, Chinea G, Silva R, Guzmán MG, Guillén G, Hermida L. A novel fusion protein domain III-capsid from dengue-2, in a highly aggregated form, induces a functional immune response and protection in mice. Virology 2009; 394:249-58. [DOI: 10.1016/j.virol.2009.08.029] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2009] [Revised: 06/15/2009] [Accepted: 08/17/2009] [Indexed: 11/29/2022]
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Gil L, López C, Lazo L, Valdés I, Marcos E, Alonso R, Gambe A, Martín J, Romero Y, Guzmán MG, Guillén G, Hermida L. Recombinant nucleocapsid-like particles from dengue-2 virus induce protective CD4+ and CD8+ cells against viral encephalitis in mice. Int Immunol 2009; 21:1175-83. [PMID: 19692540 DOI: 10.1093/intimm/dxp082] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Virus-like particles are a highly effective type of subunit vaccine that mimics the overall structure of virus particles without containing infectious genetic material. In this work, a particulate form of the recombinant capsid protein from dengue-2 was evaluated in mice to determine the level of protection against viral challenge and to measure the antigen-induced cell-mediated immunity (CMI). The nucleocapsid-like particles (NLPs) adjuvanted with alum did not induce antiviral antibodies. However, splenocytes from the immunized animals secreted high levels of IFN-gamma upon virus stimulation, and a significant protection rate was achieved after challenge with lethal dengue-2 virus. Finally, both IFN-gamma secretion and protection against viral encephalitis were demonstrated to be dependent on CD4(+) and CD8(+) cells. This study provides new evidences regarding the protective role of the CMI in the mouse model without the induction of neutralizing antibodies. Further studies in non-human primates or humanized mice should be carried out to elucidate the usefulness of the NLPs as a potential vaccine candidate against dengue disease.
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Affiliation(s)
- Lázaro Gil
- Vaccines Division, Center for Genetic Engineering and Biotechnology, Playa, Havana, Cuba.
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Lazo L, Hermida L, Zulueta A, Sánchez J, López C, Silva R, Guillén G, Guzmán MG. A recombinant capsid protein from Dengue-2 induces protection in mice against homologous virus. Vaccine 2007; 25:1064-70. [PMID: 17097199 DOI: 10.1016/j.vaccine.2006.09.068] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2006] [Revised: 09/12/2006] [Accepted: 09/20/2006] [Indexed: 10/24/2022]
Abstract
In the present work, we study the immunogenicity and protective capacity of a recombinant capsid protein from Dengue-2 virus. The capsid gene was cloned under the T5 phage promoter and expressed in Escherichia coli. The recombinant protein was obtained mainly associated to the soluble fraction upon cellular disruption and exhibited a pattern of high aggregation, determined by gel filtration chromatography. The semipurified preparation was inoculated in mice and after three doses, no antiviral antibodies were induced. On the other hand, mice intracranially challenged with homologous lethal virus, exhibited statistically significant protection with respect to the control group. These results describe, for the first time, the protective capacity of the capsid protein of Dengue virus indicating the existence of a protector mechanism, which is totally independent of the antibodies. This lack of induction of antiviral antibodies makes the capsid protein an attractive vaccine candidate against dengue since eliminates the potential risk of the induction of antibody dependent enhancement associated to the current vaccines under study.
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Affiliation(s)
- Laura Lazo
- Centro de Ingeniería Genética y Biotecnología, Apdo 6162, Habana 10600, Cuba.
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