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Bikangui R, Parkouda S, More A, Magossou Mbadinga MV, Boussoukou IPM, Ondo GN, Nkoma AMM, Adamou R, Honkpehedji YJ, Rossatanga EG, Ushijima Y, Abe H, Lell B, Dejon-Agobé JC, Yasuda J, Adegnika AA. Molecular surveillance for dengue serotypes among the population living in Moyen-Ogooué province, Gabon; evidence of the presence of dengue serotype 1. Virol J 2024; 21:141. [PMID: 38902719 PMCID: PMC11191199 DOI: 10.1186/s12985-024-02406-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 06/04/2024] [Indexed: 06/22/2024] Open
Abstract
BACKGROUND Despite dengue virus (DENV) outbreak in Gabon a decade ago, less is known on the potential circulation of DENV serotypes in the country. Previous studies conducted in some areas of the country, are limited to hospital-based surveys which reported the presence of some cases of serotype 2 and 3 seven years ago and more recently the serotype 1. As further investigation, we extend the survey to the community of Moyen Ogooué region with the aim to assess the presence of the dengue virus serotypes, additionally to characterize chikungunya (CHIKV) infection and describe the symptomatology associated with infections. METHOD A cross-sectional survey was conducted from April 2020 to March 2021. The study included participants of both sexes and any age one year and above, with fever or history of fever in the past seven days until blood collection. Eligible volunteers were clinically examined, and blood sample was collected for the detection of DENV and CHIKV using RT-qPCR. Positive samples were selected for the target sequencing. RESULTS A total of 579 volunteers were included. Their mean age (SD) was 20 (20) years with 55% of them being female. Four cases of DENV infection were diagnosed giving a prevalence of 0.7% (95%CI: 0.2-1.8) in our cohort while no case of CHIKV was detected. The common symptoms and signs presented by the DENV cases included fatigue, arthralgia myalgia, cough, and loss of appetite. DENV-1was the only virus detected by RT-qPCR. CONCLUSION Our results confirm the presence of active dengue infection in the region, particularly DENV-1, and could suggest the decline of DENV-2 and DENV-3. Continuous surveillance remains paramount to comprehensively describe the extent of dengue serotypes distribution in the Moyen-Ogooué region of Gabon.
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Affiliation(s)
- Rodrigue Bikangui
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon.
- École doctorale régionale d'Afrique centrale en Infectiologie tropicale, Franceville, Gabon.
| | | | - Ayong More
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
| | | | | | | | | | - Rafiou Adamou
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
| | - Yabo Josiane Honkpehedji
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Department of Parasitology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
- Fondation pour la Recherche Scientifique (FORS), Cotonou, Benin
| | | | - Yuri Ushijima
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Division of Biomedical Science, Institute of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Haruka Abe
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Institute of Tropical Medicine, Vietnam Research Station, Nagasaki University, Nagasaki, Japan
| | - Bertrand Lell
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- Division of Infectious Diseases and Tropical Medicine, Department of Medicine 1, Medical University of Vienna, Vienna, Austria
| | | | - Jiro Yasuda
- Department of Emerging Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- National Research Center for the Control and Prevention of Infectious Diseases (CCPID), Nagasaki University, Nagasaki, Japan
- Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Ayola Akim Adegnika
- Centre de Recherches Médicales de Lambaréné (CERMEL), Lambaréné, Gabon
- École doctorale régionale d'Afrique centrale en Infectiologie tropicale, Franceville, Gabon
- Department of Parasitology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
- Fondation pour la Recherche Scientifique (FORS), Cotonou, Benin
- Institut für Tropenmedizin, Universität Tübingen, and German Center for Infection Research (DZIF), Tübingen, Germany
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dos Santos BF, Gandolfi FA, Milhim BHGA, Dourado FS, Silva GCD, Zini N, Gratão VHR, Mariani MP, Abbas TN, Garcia PHC, Rocha RS, Vasilakis N, Nogueira ML, Estofolete CF. Diabetes as risk factor to severity of dengue in naïve patients. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.04.27.24306485. [PMID: 38746281 PMCID: PMC11092716 DOI: 10.1101/2024.04.27.24306485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Background Dengue cases can progress to severe ant life-threating forms particularly in subsequent heterologous infections. However, recent studies had explored additional risk factors, including underlying health conditions, even in individuals without prior exposure to dengue, notably, in patients with endothelial dysfunction and chronic inflammation. This study examines the link between diabetes and the development of severe dengue disease in dengue-naive patients during the 2019 dengue outbreak in São Jose do Rio Preto, Brazil. Methodology We enrolled 529 laboratory-confirmed dengue cases, identified through DENV RT-PCR or NS1 antigen assays in a hospital cohort of acute febrile illness. Subsequently, we investigated the presence of anti-dengue and anti-Zika IgG antibodies. Samples testing positive for Zika were excluded from the analyses. Two groups were analyzed: naïve (DV-), and dengue history (DV+). Results Initially, presence of diabetes and kidney disease, as well as being dengue-naive, were associated with a higher frequency of severe and potentially severe clinical outcomes. Multivariate analysis identified diabetes as a risk factor, while the presence of anti-dengue antibodies was considered protective. Analysis of dengue naïve samples, highlighted diabetes as an independent risk factor to severe forms of dengue disease. In DV+ patients, no condition was highlighted as a risk factor by univariate analysis or multivariate analysis. Conclusions We investigated and confirmed diabetes as a risk factor for severe dengue disease in individuals without prior dengue or Zika exposure. Our conclusions raise significant concerns given diabetes' ever increasing global prevalence and its potential impact on patients with or previous dengue exposure.
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Affiliation(s)
- Bárbara F. dos Santos
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Flora A. Gandolfi
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Bruno H. G. A. Milhim
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Fernanda S. Dourado
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Gislaine C. D. Silva
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Nathalia Zini
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Victor Hugo Rezende Gratão
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Matheus Pascoal Mariani
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Tamires Nasie Abbas
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Pedro H. C. Garcia
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Rodrigo S. Rocha
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch; Galveston, Texas, USA
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch; Galveston, Texas, USA
- Institute for Human Infection and Immunity, University of Texas Medical Branch; Galveston, Texas, USA
| | - Maurício L. Nogueira
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
- Department of Pathology, University of Texas Medical Branch; Galveston, Texas, USA
- Hospital de Base (HB), São José do Rio Preto, São Paulo, Brazil
| | - Cássia F. Estofolete
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, São Paulo, Brazil
- Hospital de Base (HB), São José do Rio Preto, São Paulo, Brazil
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Estofolete CF, Versiani AF, Dourado FS, Milhim BHGA, Pacca CC, Silva GCD, Zini N, dos Santos BF, Gandolfi FA, Mistrão NFB, Garcia PHC, Rocha RS, Gehrke L, Bosch I, Marques RE, Teixeira MM, da Fonseca FG, Vasilakis N, Nogueira ML. Influence of previous Zika virus infection on acute dengue episode. PLoS Negl Trop Dis 2023; 17:e0011710. [PMID: 37943879 PMCID: PMC10662752 DOI: 10.1371/journal.pntd.0011710] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 11/21/2023] [Accepted: 10/05/2023] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND The co-circulation of flaviviruses in tropical regions has led to the hypothesis that immunity generated by a previous dengue infection could promote severe disease outcomes in subsequent infections by heterologous serotypes. This study investigated the influence of antibodies generated by previous Zika infection on the clinical outcomes of dengue infection. METHODOLOGY/PRINCIPAL FINDINGS We enrolled 1,043 laboratory confirmed dengue patients and investigated their prior infection to Zika or dengue. Severe forms of dengue disease were more frequent in patients with previous Zika infection, but not in those previously exposed to dengue. CONCLUSIONS/SIGNIFICANCE Our findings suggest that previous Zika infection may represent a risk factor for subsequent severe dengue disease, but we did not find evidence of antibody-dependent enhancement (higher viral titer or pro-inflammatory cytokine overexpression) contributing to exacerbation of the subsequent dengue infection.
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Affiliation(s)
- Cassia F. Estofolete
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Alice F. Versiani
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
- Department of Pathology, University of Texas Medical Branch; Galveston, Texas, United States of America
| | - Fernanda S. Dourado
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Bruno H. G. A. Milhim
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Carolina C. Pacca
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Gislaine C. D. Silva
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Nathalia Zini
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Barbara F. dos Santos
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Flora A. Gandolfi
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Natalia F. B. Mistrão
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Pedro H. C. Garcia
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Rodrigo S. Rocha
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
| | - Lee Gehrke
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology; Cambridge, Massachusetts, United States of America
- Department of Microbiology, Harvard Medical School; Boston, Massachusetts, United States of America
| | - Irene Bosch
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology; Cambridge, Massachusetts, United States of America
| | - Rafael E. Marques
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Center for Research in Energy and Materials (CNPEM); Campinas, Sao Paulo, Brazil
| | - Mauro M. Teixeira
- Department of Biochemistry and Immunology, Universidade Federal de Minas Gerais; Belo Horizonte, Minas Gerais, Brazil
| | - Flavio G. da Fonseca
- Laboratório de Virologia Básica e Aplicada, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais; Belo Horizonte, Minas Gerais, Brazil
- Centro de Tecnoogia em Vacinas da UFMG, Universidade Federal de Minas Gerais; Belo Horizonte, Minas Gerais, Brazil
| | - Nikos Vasilakis
- Department of Pathology, University of Texas Medical Branch; Galveston, Texas, United States of America
- Center for Vector-Borne and Zoonotic Diseases, University of Texas Medical Branch; Galveston, Texas, United States of America
- Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch; Galveston, Texas, United States of America
- Center for Tropical Diseases, University of Texas Medical Branch; Galveston, Texas, United States of America
- Institute for Human Infection and Immunity, University of Texas Medical Branch; Galveston, Texas, United States of America
| | - Maurício L. Nogueira
- Laboratório de Pesquisas em Virologia (LPV), Faculdade de Medicina de São José do Rio Preto (FAMERP); São José do Rio Preto, Sao Paulo, Brazil
- Department of Pathology, University of Texas Medical Branch; Galveston, Texas, United States of America
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de Andrade Vieira Alves F, Nunes PCG, Arruda LV, Salomão NG, Rabelo K. The Innate Immune Response in DENV- and CHIKV-Infected Placentas and the Consequences for the Fetuses: A Minireview. Viruses 2023; 15:1885. [PMID: 37766291 PMCID: PMC10535478 DOI: 10.3390/v15091885] [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: 06/28/2023] [Revised: 08/25/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
Dengue virus (DENV) and chikungunya (CHIKV) are arthropod-borne viruses belonging to the Flaviviridae and Togaviridae families, respectively. Infection by both viruses can lead to a mild indistinct fever or even lead to more severe forms of the diseases, which are characterized by a generalized inflammatory state and multiorgan involvement. Infected mothers are considered a high-risk group due to their immunosuppressed state and the possibility of vertical transmission. Thereby, infection by arboviruses during pregnancy portrays a major public health concern, especially in countries where epidemics of both diseases are regular and public health policies are left aside. Placental involvement during both infections has been already described and the presence of either DENV or CHIKV has been observed in constituent cells of the placenta. In spite of that, there is little knowledge regarding the intrinsic earlier immunological mechanisms that are developed by placental cells in response to infection by both arboviruses. Here, we approach some of the current information available in the literature about the exacerbated presence of cells involved in the innate immune defense of the placenta during DENV and CHIKV infections.
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Affiliation(s)
- Felipe de Andrade Vieira Alves
- Laboratório de Ultraestrutura e Biologia Tecidual, Universidade do Estado do Rio de Janeiro/UERJ, Rio de Janeiro 20550170, RJ, Brazil; (F.d.A.V.A.); (L.V.A.)
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil
| | - Priscila Conrado Guerra Nunes
- Laboratório de Imunologia Viral, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil;
| | - Laíza Vianna Arruda
- Laboratório de Ultraestrutura e Biologia Tecidual, Universidade do Estado do Rio de Janeiro/UERJ, Rio de Janeiro 20550170, RJ, Brazil; (F.d.A.V.A.); (L.V.A.)
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil
| | - Natália Gedeão Salomão
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil
- Laboratório de Imunologia Viral, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil;
| | - Kíssila Rabelo
- Laboratório de Ultraestrutura e Biologia Tecidual, Universidade do Estado do Rio de Janeiro/UERJ, Rio de Janeiro 20550170, RJ, Brazil; (F.d.A.V.A.); (L.V.A.)
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro 21040900, RJ, Brazil
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Soegijanto S, Sucipto TH, Mulyatno KC, Churrotin S. Epidemiology Study of Dengue Virus In Surabaya, Bogor, and Bangkalan, Indonesia 2008-2018. FOLIA MEDICA INDONESIANA 2021. [DOI: 10.20473/fmi.v56i4.24640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Dengue virus (DENV) is mosquito-borne viral diseases, transmitted by the vector mosquitoes such as Aedes sp. Infection with four serotypes of DENV-1 to 4. Indonesia, dengue haemorrhagic fever (DHF) was first recognized in 1968 in the cities of Jakarta and Surabaya. In 2007, we started DENV surveillance in Surabaya supported by the joined program of the Japan Initiative for Global Research Network on Infectious Disease (J-GRID) established the Indonesia-Kobe University Collaborative Research Center for Emerging and Reemerging Infectious Diseases (CRC-ERID). The results of serotype and genotype, in Surabaya and Bangkalan are similar with previous result in Indonesia, but especially in Bogor similar with Japan 2014. This study showed the importance of continuous virus surveillance in dengue endemic areas, in order to understand the dynamic of dengue infection disease in Indonesia.
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Development of an Enzyme-Linked Immunosorbent Assay for Rapid Detection of Dengue Virus (DENV) NS1 and Differentiation of DENV Serotypes during Early Infection. J Clin Microbiol 2019; 57:JCM.00221-19. [PMID: 30971466 PMCID: PMC6595446 DOI: 10.1128/jcm.00221-19] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/03/2019] [Indexed: 12/01/2022] Open
Abstract
Dengue fever, caused by infections with the dengue virus (DENV), affects nearly 400 million people globally every year. Early diagnosis and management can reduce the morbidity and mortality rates of severe forms of dengue disease as well as decrease the risk of wider outbreaks. Dengue fever, caused by infections with the dengue virus (DENV), affects nearly 400 million people globally every year. Early diagnosis and management can reduce the morbidity and mortality rates of severe forms of dengue disease as well as decrease the risk of wider outbreaks. Although the early diagnosis of dengue can be achieved using a number of commercial NS1 detection kits, none of these can differentiate among the four dengue virus serotypes. In this study, we developed an enzyme-linked immunosorbent assay (ELISA) for the detection of dengue virus (DENV) NS1 by pairing a serotype-cross-reactive monoclonal antibody (MAb) with one of four serotype-specific MAbs in order to facilitate the rapid detection of NS1 antigens and the simultaneous differentiation of DENV serotypes. A total of 146 serum samples obtained from patients suspected to be in the acute phase of DENV infection were used to evaluate the clinical application of our novel test for the detection and serotyping of DENV. The overall sensitivity rate of our test was 84.85%, and the sensitivity rates for serotyping were as follows: 88.2% (15/17) for DENV serotype 1 (DENV1), 94.7% (18/19) for DENV2, 75% (12/16) for DENV3, and 66.6% (6/9) for DENV4. Moreover, there was no cross-reactivity among serotypes, and no cross-reactivity was observed in sera from nondengue patients. Thus, our test not only enables the rapid detection of the dengue virus but also can distinguish among the specific serotypes during the early stages of infection. These results indicate that our ELISA for DENV NS1 is a convenient tool that may help elucidate the epidemiology of DENV outbreaks and facilitate the clinical management of DENV infections.
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Sasmal SK, Takeuchi Y, Nakaoka S. T-Cell mediated adaptive immunity and antibody-dependent enhancement in secondary dengue infection. J Theor Biol 2019; 470:50-63. [DOI: 10.1016/j.jtbi.2019.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 02/13/2019] [Accepted: 03/12/2019] [Indexed: 11/26/2022]
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Marques RE, Besnard AG, Maillet I, Fagundes CT, Souza DG, Ryffel B, Teixeira MM, Liew FY, Guabiraba R. Interleukin-33 contributes to disease severity in Dengue virus infection in mice. Immunology 2018; 155:477-490. [PMID: 30098206 DOI: 10.1111/imm.12988] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 06/20/2018] [Accepted: 08/03/2018] [Indexed: 02/06/2023] Open
Abstract
The excessive inflammation often present in patients with severe dengue infection is considered both a hallmark of disease and a target for potential treatments. Interleukin-33 (IL-33) is a pleiotropic cytokine with pro-inflammatory effects whose role in dengue has not been fully elucidated. We demonstrate that IL-33 plays a disease-exacerbating role during experimental dengue infection in immunocompetent mice. Mice infected with dengue virus serotype 2 (DENV2) produced high levels of IL-33. DENV2-infected mice treated with recombinant IL-33 developed markedly more severe disease compared with untreated mice as assessed by mortality, granulocytosis, liver damage and pro-inflammatory cytokine production. Conversely, ST2-/- mice (deficient in IL-33 receptor) infected with DENV2 developed significantly less severe disease compared with wild-type mice. Furthermore, the increased disease severity and the accompanying pathology induced by IL-33 during dengue infection were reversed by the simultaneous treatment with a CXCR2 receptor antagonist (DF2156A). Together, these results indicate that IL-33 plays a disease-exacerbating role in experimental dengue infection, probably driven by CXCR2-expressing cells, leading to elevated pro-inflammatory response-mediated pathology. Our results also indicate that IL-33 is a potential therapeutic target for dengue infection.
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Affiliation(s)
- Rafael E Marques
- Brazilian Biosciences National Laboratory (LNBio), Brazilian Centre for Research in Energy and Materials (CNPEM), Campinas, Sao Paulo, Brazil
| | | | - Isabelle Maillet
- CNRS, UMR7355, Immunologie et Neurogénétique Expérimentales et Moléculaires, Université d'Orléans, Orléans, France
| | - Caio T Fagundes
- Departamento de Microbiologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Danielle G Souza
- Departamento de Microbiologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Bernhard Ryffel
- CNRS, UMR7355, Immunologie et Neurogénétique Expérimentales et Moléculaires, Université d'Orléans, Orléans, France
| | - Mauro M Teixeira
- Departamento de Bioquímica e Imunologia do Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Foo Y Liew
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, UK.,School of Biology and Basic Medical Sciences, Soochow University, Suzhou, China
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Lourenço J, Tennant W, Faria NR, Walker A, Gupta S, Recker M. Challenges in dengue research: A computational perspective. Evol Appl 2018; 11:516-533. [PMID: 29636803 PMCID: PMC5891037 DOI: 10.1111/eva.12554] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 09/08/2017] [Indexed: 01/12/2023] Open
Abstract
The dengue virus is now the most widespread arbovirus affecting human populations, causing significant economic and social impact in South America and South-East Asia. Increasing urbanization and globalization, coupled with insufficient resources for control, misguided policies or lack of political will, and expansion of its mosquito vectors are some of the reasons why interventions have so far failed to curb this major public health problem. Computational approaches have elucidated on dengue's population dynamics with the aim to provide not only a better understanding of the evolution and epidemiology of the virus but also robust intervention strategies. It is clear, however, that these have been insufficient to address key aspects of dengue's biology, many of which will play a crucial role for the success of future control programmes, including vaccination. Within a multiscale perspective on this biological system, with the aim of linking evolutionary, ecological and epidemiological thinking, as well as to expand on classic modelling assumptions, we here propose, discuss and exemplify a few major computational avenues-real-time computational analysis of genetic data, phylodynamic modelling frameworks, within-host model frameworks and GPU-accelerated computing. We argue that these emerging approaches should offer valuable research opportunities over the coming years, as previously applied and demonstrated in the context of other pathogens.
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Affiliation(s)
| | - Warren Tennant
- Centre for Mathematics and the EnvironmentUniversity of ExeterPenrynUK
| | | | | | | | - Mario Recker
- Centre for Mathematics and the EnvironmentUniversity of ExeterPenrynUK
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Vargas-Castillo AB, Ruiz-Tovar K, Vivanco-Cid H, Quiroz-Cruz S, Escobar-Gutiérrez A, Cerna-Cortes JF, Vaughan G, Fonseca-Coronado S. Association of Single-Nucleotide Polymorphisms in Immune-Related Genes with Development of Dengue Hemorrhagic Fever in a Mexican Population. Viral Immunol 2017; 31:249-255. [PMID: 29130827 DOI: 10.1089/vim.2017.0069] [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] [Indexed: 12/23/2022] Open
Abstract
Single-nucleotide polymorphisms (SNPs) occurring in immune-related genes have been associated with risk or protection for development of dengue, depending on ethnicity. Here, we genotyped seven SNPs located in immune response-related genes to identify their association with severe forms of dengue in patients from an endemic region in Mexico. One hundred and thirty-eight patients with dengue fever (DF), thirty-one dengue hemorrhagic fever (DHF) patients, as well as 304 healthy donors were genotyped by using a TaqMan-based approach. SNP analysis, including rs1800629 (TNF), rs4804803 (CD209), rs2780831 (JAK1), rs1801274 (FCGR2A), rs231775 (CTLA4), rs12979860, and rs8099917 (IFNL3), was performed. The rs1800629 A-allele in the TNF gene was associated with an increased risk of DHF (OR = 3.4, CI = 1.235-9.284 p = 0.0212) whereas SNPs rs4804803, rs2780831, rs1801274, rs231775, rs12979860, and rs8099917 showed no association in this cohort. These results show that allelic variations in TNF can play an important role in the development of DHF. However, the lack of association between all remaining SNPs and DHF suggests that the genetic background might directly modify the role of these immune-related molecules, leading to the milder illness often observed in a Mexican population.
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Affiliation(s)
- Angélica Berenice Vargas-Castillo
- 1 Laboratorio de Microbiología Molecular, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional , Ciudad de México, México .,2 Laboratorio de Inmunobiología de Enfermedades Infecciosas, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México , Cuautitlán Izcalli, México
| | - Karina Ruiz-Tovar
- 3 Coordinación de Investigaciones Inmunológicas, Instituto de Diagnóstico y Referencia Epidemiológicos , Secretaria de Salud, Ciudad de México, México
| | - Héctor Vivanco-Cid
- 4 Instituto de Investigaciones Médico Biológicas, Universidad Veracruzana , Veracruz, México
| | - Sarai Quiroz-Cruz
- 2 Laboratorio de Inmunobiología de Enfermedades Infecciosas, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México , Cuautitlán Izcalli, México
| | - Alejandro Escobar-Gutiérrez
- 3 Coordinación de Investigaciones Inmunológicas, Instituto de Diagnóstico y Referencia Epidemiológicos , Secretaria de Salud, Ciudad de México, México
| | - Jorge Francisco Cerna-Cortes
- 1 Laboratorio de Microbiología Molecular, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional , Ciudad de México, México
| | - Gilberto Vaughan
- 5 Facultad de Ciencias de la Salud, Centro de Investigación en Ciencias de la Salud (CICSA), Universidad Anáhuac México Norte , Estado de México, México
| | - Salvador Fonseca-Coronado
- 2 Laboratorio de Inmunobiología de Enfermedades Infecciosas, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México , Cuautitlán Izcalli, México
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11
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Panchal R, Mukerjee S, Chowdhary A. Influence of Human Leukocyte Antigens on Altered Immunopathology of Dendue Virus. INT J HUM GENET 2017. [DOI: 10.1080/09723757.2012.11886156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ritesh Panchal
- School of Science, SVKM’s Narsee Monjee Institute of Management Studies, VLMetha Road, Vile Parle (W), Mumbai 400 056, Maharashtra, India
| | - S. Mukerjee
- Haffkine Institute for Training, Research& Testing, Acharya Donde Marg, Parel Mumbai 400 012, Maharashtra, India
| | - Abay Chowdhary
- Haffkine Institute for Training, Research& Testing, Acharya Donde Marg, Parel Mumbai 400 012, Maharashtra, India
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12
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Pabalan N, Chaisri S, Tabunhan S, Tarasuk M, Jarjanazi H, Steiner T. Associations of tumor necrosis factor-α-308 polymorphism with dengue infection: A systematic review and meta-analysis. Acta Trop 2017; 173:17-22. [PMID: 28495402 DOI: 10.1016/j.actatropica.2017.05.007] [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: 04/02/2017] [Revised: 05/04/2017] [Accepted: 05/05/2017] [Indexed: 01/18/2023]
Abstract
Inconsistency of reported associations between the tumor necrosis factor-alpha-308 (TNFα-308) polymorphism (rs1800629) and dengue virus infection prompted a meta-analysis, to obtain more precise estimates. A literature search yielded 14 case-control studies. We calculated pooled odds ratios (OR) and 95% confidence intervals in three groups according to severity, dengue fever (DF), dengue hemorrhagic fever (DHF) and dengue (DEN) using standard genetic models. Pooled ORs were subjected to modifier treatment where re-analysis was confined to Hardy-Weinberg compliant (HWC) studies. Heterogeneity of outcomes warranted examining their sources with outlier treatment. In subgroup analysis, we compared Asian and South/Central American (SCA)/Brazilian effects. Overall pooled outcomes yielded no significant effects (OR 0.66-1.44, P=0.08-0.96). In the dominant-codominant model, pooled effects were heterogeneous (I2=47%-71%) which was lost/reduced (I2=0%-43%) when outlier treatment was applied. This also yielded significant associations (OR 0.68-0.77, P=0.02-0.05). Our results are best seen in the Asian subgroup, which in itself already yielded significant effects in DEN (OR 0.62-0.67, P=0.01-0.02). These reduced risk findings were significant from the tests of interaction (P=0.001-0.02) which highlights the protective effects of TNFα-308 among Asians. TNFα-308 effects on dengue are based on significance and non-heterogeneity of the post-outlier outcomes in the dominant and codominant models. Here, pooled effects may also be ethnic specific, where Asians are protected but not SCA. Both modified and Asian effects are up to 38% protective.
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Antibodies Against Modified NS1 Wing Domain Peptide Protect Against Dengue Virus Infection. Sci Rep 2017; 7:6975. [PMID: 28765561 PMCID: PMC5539099 DOI: 10.1038/s41598-017-07308-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 06/26/2017] [Indexed: 01/10/2023] Open
Abstract
Dengue is the most common mosquito-transmitted viral infection for which an improved vaccine is still needed. Although nonstructural protein-1 (NS1) immunization can protect mice against dengue infection, molecular mimicry between NS1 and host proteins makes NS1-based vaccines challenging to develop. Based on the epitope recognized by the anti-NS1 monoclonal Ab (mAb) 33D2 which recognizes a conserved NS1 wing domain (NS1-WD) region but not host proteins, we synthesized a modified NS1-WD peptide to immunize mice. We found that both mAb 33D2 and modified NS1-WD peptide immune sera could induce complement-dependent lysis of dengue-infected but not un-infected cells in vitro. Furthermore, either active immunization with the modified NS1-WD peptide or passive transfer of mAb 33D2 efficiently protected mice against all serotypes of dengue virus infection. More importantly, dengue patients with more antibodies recognized the modified NS1-WD peptide had less severe disease. Thus, the modified NS1-WD peptide is a promising dengue vaccine candidate.
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Das S, Sarfraz A, Jaiswal N, Das P. Impediments of reporting dengue cases in India. J Infect Public Health 2017; 10:494-498. [PMID: 28262571 DOI: 10.1016/j.jiph.2017.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 01/02/2017] [Accepted: 02/04/2017] [Indexed: 10/20/2022] Open
Abstract
Dengue has emerged as one of the most important mosquito-borne, fatal flaviviral disease, apparently expanding as a global health problem. An estimated 3.6 billion people are at risk for dengue, with 50 million infections per year occurring across 100 countries globally. The annual number of dengue fever cases in India is many times higher than it is officially reported. This under reporting would play a major role in the government's decision-making. Underestimating of the disease in India encumbers its people from taking preventive measures, discourages efforts to ensnare the sources of the disease and deliberates efforts for vaccine research. In this article, we highlight the probable impediments of under reporting leading to its impact on national and global public health and also offer key remedies to effectively address the issues across the clinics to the community level.
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Affiliation(s)
- Sushmita Das
- Department of Microbiology, All-India Institute of Medical Sciences (AIIMS), Patna, India.
| | - Asim Sarfraz
- Department of Microbiology, All-India Institute of Medical Sciences (AIIMS), Patna, India
| | - Nitesh Jaiswal
- Department of Microbiology, All-India Institute of Medical Sciences (AIIMS), Patna, India
| | - Pradeep Das
- Virology Unit, Rajendra Memorial Research Institute of Medical Sciences (ICMR), Patna, India
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Influence of demographics on clinical outcome of dengue: a cross-sectional study of 6703 confirmed cases in Vitória, Espírito Santo State, Brazil. Epidemiol Infect 2016; 145:46-53. [PMID: 27609661 DOI: 10.1017/s0950268816002004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Dengue presents a wide clinical spectrum of signs and symptoms, with characteristics of the host potentially influencing the disease evolution. Therefore, the purpose of this study was to evaluate the influence of gender and age on dengue clinical outcomes in a recent outbreak situation in Brazil, applying a cross-sectional design and including 6703 dengue cases with laboratory confirmation, occurring in Vitória, Espírito Santo State, Brazil, between 2007 and 2013. Data were obtained from the Information System for Notifiable Diseases. Overall, 11·3% of the sample presented with severe dengue, which affected 13·0% of males, 10·0% of females, 8·8% of children, 12·5% of adolescents, 10·5% of adults and 15·5% of the elderly. Age was higher in the severe dengue group (P = 0·03). Severe dengue was associated with males and the elderly (P < 0·01); however, considering only severe cases, children presented haemorrhage and plasma leakage more frequently than older age groups. The results emphasize the importance of a differentiated protocol for management of dengue cases, taking into consideration host factors like age. These findings also suggest the elderly and children as priority groups for immunization in a future implementation of a vaccine.
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16
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Liposomal Systems as Nanocarriers for the Antiviral Agent Ivermectin. Int J Biomater 2016; 2016:8043983. [PMID: 27242902 PMCID: PMC4875998 DOI: 10.1155/2016/8043983] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 03/17/2016] [Accepted: 03/31/2016] [Indexed: 11/24/2022] Open
Abstract
RNA virus infections can lead to the onset of severe diseases such as fever with haemorrhage, multiorgan failure, and mortality. The emergence and reemergence of RNA viruses continue to pose a significant public health threat worldwide with particular attention to the increasing incidence of flaviviruses, among others Dengue, West Nile Virus, and Yellow Fever viruses. Development of new and potent antivirals is thus urgently needed. Ivermectin, an already known antihelminthic drug, has shown potent effects in vitro on Flavivirus helicase, with EC50 values in the subnanomolar range for Yellow Fever and submicromolar EC50 for Dengue Fever, Japanese encephalitis, and tick-borne encephalitis viruses. However ivermectin is hampered in its application by pharmacokinetic problems (little solubility and high cytotoxicity). To overcome such problems we engineered different compositions of liposomes as ivermectin carriers characterizing and testing them on several cell lines for cytotoxicity. The engineered liposomes were less cytotoxic than ivermectin alone and they showed a significant increase of the antiviral activity in all the Dengue stains tested (1, 2, and S221). In the current study ivermectin is confirmed to be an effective potential antiviral and liposomes, as drug carriers, are shown to modulate the drug activity. All together the results represent a promising starting point for future improvement of ivermectin as antiviral and its delivery.
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17
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Solbrig MV, Perng GC. Current neurological observations and complications of dengue virus infection. Curr Neurol Neurosci Rep 2016; 15:29. [PMID: 25877545 DOI: 10.1007/s11910-015-0550-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Dengue, a mosquito-borne flavivirus and fastest growing tropical disease in the world, has experienced an explosion of neurologic case reports and series in recent years. Now dengue is a frequent or leading cause of encephalitis in some endemic regions, is estimated to infect one in six tourists returning from the tropics, and has been proven to have local transmission within the continental USA. High documentation of neurologic disease in recent years reflects increases in overall cases, enhanced clinical awareness and advances in diagnostics. Neurological aspects of dengue virus, along with epidemiology, treatment, and vaccine progress, are presented.
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Affiliation(s)
- Marylou V Solbrig
- Department of Pharmacology and Toxicology, School of Pharmacy, University of Kansas, 1251 Wescoe Hall Drive, Malott Hall Rm 5040, Lawrence, KS, 66045, USA,
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18
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Increasing Clinical Severity during a Dengue Virus Type 3 Cuban Epidemic: Deep Sequencing of Evolving Viral Populations. J Virol 2016; 90:4320-4333. [PMID: 26889031 PMCID: PMC4836355 DOI: 10.1128/jvi.02647-15] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 02/05/2016] [Indexed: 01/20/2023] Open
Abstract
UNLABELLED During the dengue virus type 3 (DENV-3) epidemic that occurred in Havana in 2001 to 2002, severe disease was associated with the infection sequence DENV-1 followed by DENV-3 (DENV-1/DENV-3), while the sequence DENV-2/DENV-3 was associated with mild/asymptomatic infections. To determine the role of the virus in the increasing severity demonstrated during the epidemic, serum samples collected at different time points were studied. A total of 22 full-length sequences were obtained using a deep-sequencing approach. Bayesian phylogenetic analysis of consensus sequences revealed that two DENV-3 lineages were circulating in Havana at that time, both grouped within genotype III. The predominant lineage is closely related to Peruvian and Ecuadorian strains, while the minor lineage is related to Venezuelan strains. According to consensus sequences, relatively few nonsynonymous mutations were observed; only one was fixed during the epidemic at position 4380 in the NS2B gene. Intrahost genetic analysis indicated that a significant minor population was selected and became predominant toward the end of the epidemic. In conclusion, greater variability was detected during the epidemic's progression in terms of significant minority variants, particularly in the nonstructural genes. An increasing trend of genetic diversity toward the end of the epidemic was observed only for synonymous variant allele rates, with higher variability in secondary cases. Remarkably, significant intrahost genetic variation was demonstrated within the same patient during the course of secondary infection with DENV-1/DENV-3, including changes in the structural proteins premembrane (PrM) and envelope (E). Therefore, the dynamic of evolving viral populations in the context of heterotypic antibodies could be related to the increasing clinical severity observed during the epidemic. IMPORTANCE Based on the evidence that DENV fitness is context dependent, our research has focused on the study of viral factors associated with intraepidemic increasing severity in a unique epidemiological setting. Here, we investigated the intrahost genetic diversity in acute human samples collected at different time points during the DENV-3 epidemic that occurred in Cuba in 2001 to 2002 using a deep-sequencing approach. We concluded that greater variability in significant minor populations occurred as the epidemic progressed, particularly in the nonstructural genes, with higher variability observed in secondary infection cases. Remarkably, for the first time significant intrahost genetic variation was demonstrated within the same patient during the course of secondary infection with DENV-1/DENV-3, including changes in structural proteins. These findings indicate that high-resolution approaches are needed to unravel molecular mechanisms involved in dengue pathogenesis.
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Caprara A, Lima JWDO, Peixoto ACR, Motta CMV, Nobre JMS, Sommerfeld J, Kroeger A. Entomological impact and social participation in dengue control: a cluster randomized trial in Fortaleza, Brazil. Trans R Soc Trop Med Hyg 2015; 109:99-105. [PMID: 25604760 PMCID: PMC4299523 DOI: 10.1093/trstmh/tru187] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND This study intended to implement a novel intervention strategy, in Brazil, using an ecohealth approach and analyse its effectiveness and costs in reducing Aedes aegypti vector density as well as its acceptance, feasibility and sustainability. The intervention was conducted from 2012 to 2013 in the municipality of Fortaleza, northeast Brazil. METHODOLOGY A cluster randomized controlled trial was designed by comparing ten intervention clusters with ten control clusters where routine vector control activities were conducted. The intervention included: community workshops; community involvement in clean-up campaigns; covering the elevated containers and in-house rubbish disposal without larviciding; mobilization of schoolchildren and senior inhabitants; and distribution of information, education and communication (IEC) materials in the community. RESULTS Differences in terms of social participation, commitment and leadership were present in the clusters. The results showed the effectiveness of the intervention package in comparison with the routine control programme. Differences regarding the costs of the intervention were reasonable and could be adopted by public health services. CONCLUSIONS Embedding social participation and environmental management for improved dengue vector control was feasible and significantly reduced vector densities. Such a participatory ecohealth approach offers a promising alternative to routine vector control measures.
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Affiliation(s)
- Andrea Caprara
- University of Ceará State (UECE), Centro de Ciências da Saúde, Department of Public Health, UECE Av. Dr. Silas Munguba, 1700, Itaperi- Fortaleza, 60740-000, CE Brasil
| | - José Wellington De Oliveira Lima
- University of Ceará State (UECE), Centro de Ciências da Saúde, Department of Public Health, UECE Av. Dr. Silas Munguba, 1700, Itaperi- Fortaleza, 60740-000, CE Brasil
| | - Ana Carolina Rocha Peixoto
- University of Ceará State (UECE), Centro de Ciências da Saúde, Department of Public Health, UECE Av. Dr. Silas Munguba, 1700, Itaperi- Fortaleza, 60740-000, CE Brasil
| | - Cyntia Monteiro Vasconcelos Motta
- University of Ceará State (UECE), Centro de Ciências da Saúde, Department of Public Health, UECE Av. Dr. Silas Munguba, 1700, Itaperi- Fortaleza, 60740-000, CE Brasil
| | - Joana Mary Soares Nobre
- University of Ceará State (UECE), Centro de Ciências da Saúde, Department of Public Health, UECE Av. Dr. Silas Munguba, 1700, Itaperi- Fortaleza, 60740-000, CE Brasil
| | - Johannes Sommerfeld
- Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization, Geneva, Switzerland
| | - Axel Kroeger
- Special Programme for Research and Training in Tropical Diseases (TDR), World Health Organization, Geneva, Switzerland Liverpool School of Tropical Medicine, Liverpool, UK
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20
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Lum FM, Ng LF. Cellular and molecular mechanisms of chikungunya pathogenesis. Antiviral Res 2015; 120:165-74. [DOI: 10.1016/j.antiviral.2015.06.009] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 05/27/2015] [Accepted: 06/16/2015] [Indexed: 12/15/2022]
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21
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Marques RE, Guabiraba R, Del Sarto JL, Rocha RF, Queiroz AL, Cisalpino D, Marques PE, Pacca CC, Fagundes CT, Menezes GB, Nogueira ML, Souza DG, Teixeira MM. Dengue virus requires the CC-chemokine receptor CCR5 for replication and infection development. Immunology 2015; 145:583-96. [PMID: 25939314 DOI: 10.1111/imm.12476] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/29/2015] [Accepted: 04/30/2015] [Indexed: 01/26/2023] Open
Abstract
Dengue is a mosquito-borne disease that affects millions of people worldwide yearly. Currently, there is no vaccine or specific treatment available. Further investigation on dengue pathogenesis is required to better understand the disease and to identify potential therapeutic targets. The chemokine system has been implicated in dengue pathogenesis, although the specific role of chemokines and their receptors remains elusive. Here we describe the role of the CC-chemokine receptor CCR5 in Dengue virus (DENV-2) infection. In vitro experiments showed that CCR5 is a host factor required for DENV-2 replication in human and mouse macrophages. DENV-2 infection induces the expression of CCR5 ligands. Incubation with an antagonist prevents CCR5 activation and reduces DENV-2 positive-stranded (+) RNA inside macrophages. Using an immunocompetent mouse model of DENV-2 infection we found that CCR5(-/-) mice were resistant to lethal infection, presenting at least 100-fold reduction of viral load in target organs and significant reduction in disease severity. This phenotype was reproduced in wild-type mice treated with CCR5-blocking compounds. Therefore, CCR5 is a host factor required for DENV-2 replication and disease development. Targeting CCR5 might represent a therapeutic strategy for dengue fever. These data bring new insights on the association between viral infections and the chemokine receptor CCR5.
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Affiliation(s)
- Rafael E Marques
- Immunopharmacology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Juliana L Del Sarto
- Immunopharmacology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Rebeca F Rocha
- Immunopharmacology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Ana Luiza Queiroz
- Immunopharmacology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Daniel Cisalpino
- Microorganism/Host Interaction, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Pedro E Marques
- Immunobiophotonics, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carolina C Pacca
- Laboratório de Pesquisa em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São Paulo, Brazil
| | - Caio T Fagundes
- Microorganism/Host Interaction, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Gustavo B Menezes
- Immunobiophotonics, Departamento de Morfologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Maurício L Nogueira
- Laboratório de Pesquisa em Virologia, Departamento de Doenças Dermatológicas, Infecciosas e Parasitárias, Faculdade de Medicina de São José do Rio Preto, São Paulo, Brazil
| | - Danielle G Souza
- Microorganism/Host Interaction, Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Mauro M Teixeira
- Immunopharmacology, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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22
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Parreira R, Sousa CA. Dengue fever in Europe: could there be an epidemic in the future? Expert Rev Anti Infect Ther 2014; 13:29-40. [DOI: 10.1586/14787210.2015.982094] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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23
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Piazza P, Campbell D, Marques E, Hildebrand WH, Buchli R, Mailliard R, Rinaldo CR. Dengue virus-infected human dendritic cells reveal hierarchies of naturally expressed novel NS3 CD8 T cell epitopes. Clin Exp Immunol 2014; 177:696-702. [PMID: 24816171 DOI: 10.1111/cei.12373] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2014] [Indexed: 11/30/2022] Open
Abstract
Detailed knowledge of dengue virus (DENV) cell-mediated immunity is limited. In this study we characterize CD8(+) T lymphocytes recognizing three novel and two known non-structural protein 3 peptide epitopes in DENV-infected dendritic cells. Three epitopes displayed high conservation (75-100%), compared to the others (0-50%). A hierarchy ranking based on magnitude and polyfunctionality of the antigen-specific response showed that dominant epitopes were both highly conserved and cross-reactive against multiple DENV serotypes. These results are relevant to DENV pathogenesis and vaccine design.
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Affiliation(s)
- P Piazza
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, PA, USA
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24
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Williams M, Mayer SV, Johnson WL, Chen R, Volkova E, Vilcarromero S, Widen SG, Wood TG, Suarez-Ognio L, Long KC, Hanley KA, Morrison AC, Vasilakis N, Halsey ES. Lineage II of Southeast Asian/American DENV-2 is associated with a severe dengue outbreak in the Peruvian Amazon. Am J Trop Med Hyg 2014; 91:611-20. [PMID: 25002298 DOI: 10.4269/ajtmh.13-0600] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
During 2010 and 2011, the Loreto region of Peru experienced a dengue outbreak of unprecedented magnitude and severity for the region. This outbreak coincided with the reappearance of dengue virus-2 (DENV-2) in Loreto after almost 8 years. Whole-genome sequence indicated that DENV-2 from the outbreak belonged to lineage II of the southeast Asian/American genotype and was most closely related to viruses circulating in Brazil during 2007 and 2008, whereas DENV-2 previously circulating in Loreto grouped with lineage I (DENV-2 strains circulating in South America since 1990). One amino acid substitution (NS5 A811V) in the 2010 and 2011 isolates resulted from positive selection. However, the 2010 and 2011 DENV-2 did not replicate to higher titers in monocyte-derived dendritic cells and did not infect or disseminate in a higher proportion of Aedes aegypti than DENV-2 isolates previously circulating in Loreto. These results suggest that factors other than enhanced viral replication played a role in the severity of this outbreak.
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Affiliation(s)
- Maya Williams
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Sandra V Mayer
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - William L Johnson
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Rubing Chen
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Evgeniya Volkova
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Stalin Vilcarromero
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Steven G Widen
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Thomas G Wood
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Luis Suarez-Ognio
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Kanya C Long
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Kathryn A Hanley
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Amy C Morrison
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Nikos Vasilakis
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
| | - Eric S Halsey
- Department of Virology, US Naval Medical Research Unit No. 6, Lima, Peru; Department of Pathology and Center for Biodefense and Emerging Infectious Diseases, University of Texas Medical Branch, Galveston, Texas; Department of Biology, New Mexico State University, Las Cruces, New Mexico; Department of Virology, US Naval Medical Research Unit No. 6, Iquitos, Peru; Department of Biochemistry and Molecular Biology, University of Texas Medical Branch, Galveston, Texas; Dirección General de Epidemiología del Ministerio de Salud del Perú, Lima, Perú; Entomology Department, University of California, Davis, California; Institute for Human Infections and Immunity and Center for Tropical Diseases, University of Texas Medical Branch, Galveston, Texas
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Rodriguez-Roche R, Gould EA. Understanding the dengue viruses and progress towards their control. BIOMED RESEARCH INTERNATIONAL 2013; 2013:690835. [PMID: 23936833 PMCID: PMC3722981 DOI: 10.1155/2013/690835] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 05/08/2013] [Indexed: 01/12/2023]
Abstract
Traditionally, the four dengue virus serotypes have been associated with fever, rash, and the more severe forms, haemorrhagic fever and shock syndrome. As our knowledge as well as understanding of these viruses increases, we now recognise not only that they are causing increasing numbers of human infections but also that they may cause neurological and other clinical complications, with sequelae or fatal consequences. In this review we attempt to highlight some of these features in the context of dengue virus pathogenesis. We also examine some of the efforts currently underway to control this "scourge" of the tropical and subtropical world.
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Affiliation(s)
- Rosmari Rodriguez-Roche
- Pedro Kouri Tropical Medicine Institute, WHO/PAHO Collaborating Centre for the Study of Dengue and Its Vector, Havana, Cuba.
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26
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Guzman MG, Alvarez M, Halstead SB. Secondary infection as a risk factor for dengue hemorrhagic fever/dengue shock syndrome: an historical perspective and role of antibody-dependent enhancement of infection. Arch Virol 2013; 158:1445-59. [PMID: 23471635 DOI: 10.1007/s00705-013-1645-3] [Citation(s) in RCA: 469] [Impact Index Per Article: 42.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 01/17/2013] [Indexed: 01/06/2023]
Abstract
Today, dengue viruses are the most prevalent arthropod-borne viruses in the world. Since the 1960s, numerous reports have identified a second heterologous dengue virus (DENV) infection as a principal risk factor for severe dengue disease (dengue hemorrhagic fever/dengue shock syndrome, DHF/DSS). Modifiers of dengue disease response include the specific sequence of two DENV infections, the interval between infections, and contributions from the human host, such as age, ethnicity, chronic illnesses and genetic background. Antibody-dependent enhancement (ADE) of dengue virus infection has been proposed as the early mechanism underlying DHF/DSS. Dengue cross-reactive antibodies raised following a first dengue infection combine with a second infecting virus to form infectious immune complexes that enter Fc-receptor-bearing cells. This results in an increased number of infected cells and increased viral output per cell. At the late illness stage, high levels of cytokines, possibly the result of T cell elimination of infected cells, result in vascular permeability, leading to shock and death. This review is focused on the etiological role of secondary infections (SI) and mechanisms of ADE.
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Affiliation(s)
- Maria G Guzman
- Institute of Tropical Medicine Pedro Kouri, Havana, Cuba.
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27
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García G, González D, Sánchez L, Pérez AB, Sierra B, Guzmán MG. Polimorfismo del receptor FcγRIIa y su posible relación con las manifestaciones clínicas del dengue. Enferm Infecc Microbiol Clin 2012; 30:621-3. [DOI: 10.1016/j.eimc.2012.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 05/15/2012] [Accepted: 05/27/2012] [Indexed: 10/28/2022]
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Mastrangelo E, Pezzullo M, De Burghgraeve T, Kaptein S, Pastorino B, Dallmeier K, de Lamballerie X, Neyts J, Hanson AM, Frick DN, Bolognesi M, Milani M. Ivermectin is a potent inhibitor of flavivirus replication specifically targeting NS3 helicase activity: new prospects for an old drug. J Antimicrob Chemother 2012; 67:1884-94. [PMID: 22535622 DOI: 10.1093/jac/dks147] [Citation(s) in RCA: 266] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Infection with yellow fever virus (YFV), the prototypic mosquito-borne flavivirus, causes severe febrile disease with haemorrhage, multi-organ failure and a high mortality. Moreover, in recent years the Flavivirus genus has gained further attention due to re-emergence and increasing incidence of West Nile, dengue and Japanese encephalitis viruses. Potent and safe antivirals are urgently needed. METHODS Starting from the crystal structure of the NS3 helicase from Kunjin virus (an Australian variant of West Nile virus), we identified a novel, unexploited protein site that might be involved in the helicase catalytic cycle and could thus in principle be targeted for enzyme inhibition. In silico docking of a library of small molecules allowed us to identify a few selected compounds with high predicted affinity for the new site. Their activity against helicases from several flaviviruses was confirmed in in vitro helicase/enzymatic assays. The effect on the in vitro replication of flaviviruses was then evaluated. RESULTS Ivermectin, a broadly used anti-helminthic drug, proved to be a highly potent inhibitor of YFV replication (EC₅₀ values in the sub-nanomolar range). Moreover, ivermectin inhibited, although less efficiently, the replication of several other flaviviruses, i.e. dengue fever, Japanese encephalitis and tick-borne encephalitis viruses. Ivermectin exerts its effect at a timepoint that coincides with the onset of intracellular viral RNA synthesis, as expected for a molecule that specifically targets the viral helicase. CONCLUSIONS The well-tolerated drug ivermectin may hold great potential for treatment of YFV infections. Furthermore, structure-based optimization may result in analogues exerting potent activity against flaviviruses other than YFV.
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Affiliation(s)
- Eloise Mastrangelo
- Dipartimento di Scienze Biomolecolari e Biotecnologie, Università degli Studi di Milano, via Celoria 26, 20133 Milano, Italy
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OhAinle M, Balmaseda A, Macalalad AR, Tellez Y, Zody MC, Saborío S, Nuñez A, Lennon NJ, Birren BW, Gordon A, Henn MR, Harris E. Dynamics of dengue disease severity determined by the interplay between viral genetics and serotype-specific immunity. Sci Transl Med 2012; 3:114ra128. [PMID: 22190239 DOI: 10.1126/scitranslmed.3003084] [Citation(s) in RCA: 223] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The rapid spread of dengue is a worldwide public health problem. In two clinical studies of dengue in Managua, Nicaragua, we observed an abrupt increase in disease severity across several epidemic seasons of dengue virus serotype 2 (DENV-2) transmission. Waning DENV-1 immunity appeared to increase the risk of severe disease in subsequent DENV-2 infections after a period of cross-protection. The increase in severity coincided with replacement of the Asian/American DENV-2 NI-1 clade with a new virus clade, NI-2B. In vitro analyses of viral isolates from the two clades and analysis of viremia in patient blood samples support the emergence of a fitter virus in later, relative to earlier, epidemic seasons. In addition, the NI-1 clade of viruses was more virulent specifically in children who were immune to DENV-1, whereas DENV-3 immunity was associated with more severe disease among NI-2B infections. Our data demonstrate that the complex interaction between viral genetics and population dynamics of serotype-specific immunity contributes to the risk of severe dengue disease. Furthermore, this work provides insights into viral evolution and the interaction between viral and immunological determinants of viral fitness and virulence.
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Affiliation(s)
- Molly OhAinle
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, Berkeley, CA 94720-7354, USA
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Monteiro SP, Brasil PEAAD, Cabello GMK, Souza RVD, Brasil P, Georg I, Cabello PH, De Castro L. HLA-A*01 allele: a risk factor for dengue haemorrhagic fever in Brazil's population. Mem Inst Oswaldo Cruz 2012; 107:224-30. [DOI: 10.1590/s0074-02762012000200012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 10/24/2011] [Indexed: 11/22/2022] Open
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Furuta T, Murao LA, Lan NTP, Huy NT, Huong VTQ, Thuy TT, Tham VD, Nga CTP, Ha TTN, Ohmoto Y, Kikuchi M, Morita K, Yasunami M, Hirayama K, Watanabe N. Association of mast cell-derived VEGF and proteases in Dengue shock syndrome. PLoS Negl Trop Dis 2012; 6:e1505. [PMID: 22363824 PMCID: PMC3283553 DOI: 10.1371/journal.pntd.0001505] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 12/20/2011] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Recent in-vitro studies have suggested that mast cells are involved in Dengue virus infection. To clarify the role of mast cells in the development of clinical Dengue fever, we compared the plasma levels of several mast cell-derived mediators (vascular endothelial cell growth factor [VEGF], soluble VEGF receptors [sVEGFRs], tryptase, and chymase) and -related cytokines (IL-4, -9, and -17) between patients with differing severity of Dengue fever and healthy controls. METHODOLOGY/PRINCIPAL FINDINGS The study was performed at Children's Hospital No. 2, Ho Chi Minh City, and Vinh Long Province Hospital, Vietnam from 2002 to 2005. Study patients included 103 with Dengue fever (DF), Dengue hemorrhagic fever (DHF), and Dengue shock syndrome (DSS), as diagnosed by the World Health Organization criteria. There were 189 healthy subjects, and 19 febrile illness patients of the same Kinh ethnicity. The levels of mast cell-derived mediators and -related cytokines in plasma were measured by ELISA. VEGF and sVEGFR-1 levels were significantly increased in DHF and DSS compared with those of DF and controls, whereas sVEGFR-2 levels were significantly decreased in DHF and DSS. Significant increases in tryptase and chymase levels, which were accompanied by high IL-9 and -17 concentrations, were detected in DHF and DSS patients. By day 4 of admission, VEGF, sVEGFRs, and proteases levels had returned to similar levels as DF and controls. In-vitro VEGF production by mast cells was examined in KU812 and HMC-1 cells, and was found to be highest when the cells were inoculated with Dengue virus and human Dengue virus-immune serum in the presence of IL-9. CONCLUSIONS As mast cells are an important source of VEGF, tryptase, and chymase, our findings suggest that mast cell activation and mast cell-derived mediators participate in the development of DHF. The two proteases, particularly chymase, might serve as good predictive markers of Dengue disease severity.
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Affiliation(s)
- Takahisa Furuta
- Division of Infectious Genetics, Institute of Medical Science, University of Tokyo, Tokyo, Japan.
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Guzman MG, Alvarez A, Vazquez S, Alvarez M, Rosario D, Pelaez O, Cruz G, Rodriguez R, Pavon A, Gonzalez A, Morier L, Ruiz D, Kouri G, Halstead SB. Epidemiological studies on dengue virus type 3 in Playa municipality, Havana, Cuba, 2001-2002. Int J Infect Dis 2012; 16:e198-203. [PMID: 22277259 DOI: 10.1016/j.ijid.2011.09.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 08/30/2011] [Accepted: 09/01/2011] [Indexed: 10/14/2022] Open
Abstract
OBJECTIVES Recognizing the uniqueness of secondary dengue virus (DENV)-1/3 dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS) cases at an interval of 24 years, we sought to estimate DENV infections as well as the ratios between mild disease and DHF/DSS by DENV infection sequence in Playa District (Havana, Cuba) during the 2001-2002 outbreak of dengue virus type 3 (DENV-3). METHODS A retrospective seroepidemiological study was conducted in 2003 in Playa District. Blood samples were collected from a 1% random sample of residents and were studied for the prevalence of dengue neutralizing antibodies. RESULTS DENV-3 was found to have infected 7.2% (95% confidence interval (95% CI) 6.0-8.4%) of susceptible individuals (the entire cohort), the majority of whom experienced silent infections. Virtually every individual who had a secondary infection in the sequence DENV-1 then DENV-3 became ill, with a ratio of severe to mild cases of 1:35 (95% CI 1:67-1:23). Secondary infections in the sequence DENV-2/3 were less pathogenic than DENV-1/3. Mild disease accompanying secondary DENV2/3 occurred at a ratio of 1:4.49 infections (95% CI 1:5.77-1:3.42) secondary infections. CONCLUSIONS The results obtained highlight the role of the infecting serotype and also the sequence of the viral infection in the clinical outcome of a dengue infection.
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Affiliation(s)
- Maria G Guzman
- Department of Virology, PAHO/WHO Collaborating Center for Study of Dengue and its Vector, Pedro Kouri Tropical Medicine Institute, Autopista Novia del Mediodía km 6, PO Box 601, Marianao 13, Havana, Cuba.
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Rodriguez-Roche R, Villegas E, Cook S, Poh Kim PAW, Hinojosa Y, Rosario D, Villalobos I, Bendezu H, Hibberd ML, Guzman MG. Population structure of the dengue viruses, Aragua, Venezuela, 2006-2007. Insights into dengue evolution under hyperendemic transmission. INFECTION GENETICS AND EVOLUTION 2011; 12:332-44. [PMID: 22197765 PMCID: PMC3919160 DOI: 10.1016/j.meegid.2011.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 12/08/2011] [Accepted: 12/10/2011] [Indexed: 12/16/2022]
Abstract
During the past three decades there has been a notable increase in dengue disease severity in Venezuela. Nevertheless, the population structure of the viruses being transmitted in this country is not well understood. Here, we present a molecular epidemiological study on dengue viruses (DENV) circulating in Aragua State, Venezuela during 2006-2007. Twenty-one DENV full-length genomes representing all of the four serotypes were amplified and sequenced directly from the serum samples. Notably, only DENV-2 was associated with severe disease. Phylogenetic trees constructed using Bayesian methods indicated that only one genotype was circulating for each serotype. However, extensive viral genetic diversity was found in DENV isolated from the same area during the same period, indicating significant in situ evolution since the introduction of these genotypes. Collectively, the results suggest that the non-structural (NS) proteins may play an important role in DENV evolution, particularly NS1, NS2A and NS4B proteins. The phylogenetic data provide evidence to suggest that multiple introductions of DENV have occurred from the Latin American region into Venezuela and vice versa. The implications of the significant viral genetic diversity generated during hyperendemic transmission, particularly in NS protein are discussed and considered in the context of future development and use of human monoclonal antibodies as antivirals and tetravalent vaccines.
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Association of MICA and MICB alleles with symptomatic dengue infection. Hum Immunol 2011; 72:904-7. [DOI: 10.1016/j.humimm.2011.06.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 06/16/2011] [Accepted: 06/27/2011] [Indexed: 01/29/2023]
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García-Trejo AR, Falcón-Lezama JA, Juárez-Palma L, Granados J, Zúñiga-Ramos J, Rangel H, Barquera R, Vargas-Alarcón G, Ramos C. Tumor necrosis factor alpha promoter polymorphisms in Mexican patients with dengue fever. Acta Trop 2011; 120:67-71. [PMID: 21693096 DOI: 10.1016/j.actatropica.2011.06.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 04/27/2011] [Accepted: 06/03/2011] [Indexed: 02/02/2023]
Abstract
Increased levels of tumor necrosis factor alpha (TNF-α) in patients with dengue have been reported. Various polymorphisms have been identified in the promoter region of the TNF-α gene that may affect its transcription. The purpose of the present study was to evaluate the relationship between polymorphisms of TNF-α gene and the genetic susceptibility to dengue fever in a group of patients from Morelos State, Mexico. The TNF-α polymorphisms (positions -238 and -308) were determined by PCR-RFLP technique in 130 patients with dengue (85 with dengue fever and 45 with dengue hemorrhagic fever) and 169 healthy controls. The patients were selected from cases reported in Morelos State from 1997 to 2003. The whole group of dengue patients showed a decreased frequency of TNF-α -238 A allele when compared to healthy controls (p = 0.01, OR = 0.19, 95%CI = 0.02-0.78). When the analysis was made separately in dengue fever and dengue hemorrhagic fever patients, the decreased frequency of TNF-α -238 A allele only remained significant in patients with DHF when compared to healthy controls (p = 0.034). This work suggests a possible association of TNF-α -238 A allele with protection to develop symptomatic disease.
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Abstract
Dengue is an important cause of childhood and adult morbidity in Asian and Latin American countries and its geographic footprint is growing. The clinical manifestations of dengue are the expression of a constellation of host and viral factors, some acquired, others intrinsic to the individual. The virulence of the virus plus the flavivirus infection history, age, gender and genotype of the host all appear to help shape the severity of infection. Similarly, the characteristics of the innate and acquired host immune response subsequent to infection are also likely determinants of outcome. This review summarises recent developments in the understanding of dengue pathogenesis and their relevance to dengue vaccine development.
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Rioth M, Beauharnais CA, Noel F, Ikizler MR, Mehta S, Zhu Y, Long CA, Pape JW, Wright PF. Serologic imprint of dengue virus in urban Haiti: characterization of humoral immunity to dengue in infants and young children. Am J Trop Med Hyg 2011; 84:630-6. [PMID: 21460022 DOI: 10.4269/ajtmh.2011.10-0323] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Dengue is endemic to Haiti but not recognized as an important illness in the autochthonous population. To evaluate the prevalence of antibodies to dengue virus (DENV), serum samples from infants and young children 7-36 months of age (n = 166) were assayed by plaque reduction neutralization assays to each DENV serotype. Dengue virus serotype 1 had infected 40% of this study population, followed by serotype 2 (12%), serotype 3 (11%), and serotype 4 (2%). Fifty-three percent of infants and young children less than 12 months of age had already experienced DENV infection, and the seroprevalence of antibody to DENV increased to 65% by 36 months. Heterotypic antibody responses were an important component of the total dengue immunity profile.
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Affiliation(s)
- Meghan Rioth
- Department of Pediatrics, Vanderbilt University, Nashville, TN, USA.
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Long-term persistence of clinical symptoms in dengue-infected persons and its association with immunological disorders. Int J Infect Dis 2011; 15:e38-43. [DOI: 10.1016/j.ijid.2010.09.008] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Revised: 08/18/2010] [Accepted: 09/11/2010] [Indexed: 01/19/2023] Open
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Guzman MG, Vazquez S. The complexity of antibody-dependent enhancement of dengue virus infection. Viruses 2010; 2:2649-62. [PMID: 21994635 PMCID: PMC3185591 DOI: 10.3390/v2122649] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 11/22/2010] [Accepted: 11/22/2010] [Indexed: 12/30/2022] Open
Abstract
Antibody-dependent enhancement (ADE) has been proposed as a mechanism to explain dengue hemorrhagic fever (DHF) in the course of a secondary dengue infection. Very recently, Dejnirattisai et al., 2010 [1], published an important article supporting the involvement of anti-prM antibodies in the ADE phenomenon. The complexity of ADE in the context of a secondary dengue infection is discussed here.
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Affiliation(s)
- Maria G. Guzman
- Department of Virology, PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, “Pedro Kouri” Tropical Medicine Institute of Havana, Cuba; E-Mail:
| | - Susana Vazquez
- Department of Virology, PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, “Pedro Kouri” Tropical Medicine Institute of Havana, Cuba; E-Mail:
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Perez AB, Sierra B, Garcia G, Aguirre E, Babel N, Alvarez M, Sanchez L, Valdes L, Volk HD, Guzman MG. Tumor necrosis factor-alpha, transforming growth factor-β1, and interleukin-10 gene polymorphisms: implication in protection or susceptibility to dengue hemorrhagic fever. Hum Immunol 2010; 71:1135-40. [PMID: 20732366 DOI: 10.1016/j.humimm.2010.08.004] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 07/18/2010] [Accepted: 08/16/2010] [Indexed: 10/19/2022]
Abstract
Dengue virus infection has emerged as one of the most important arthropod-borne viral diseases. Some dengue infected individuals develop the severe, life-threatening form of the disease, dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS). Host genetic factors may be relevant and may predispose some individuals to the severe illness. Human leukocyte antigen (HLA), FcγR, tumor necrosis factor (TNF)-α, and dendritic cell-specific intracellular adhesion molecule-3-grabbing nonintegrin (DC-SIGN), among others genes have been associated with the pathogenesis of dengue. Little is known, however, about the predictive value of cytokine genotypes for the clinical outcome of dengue infection. In this study, the TNF-α, interleukin (IL)-6, interferon (IFN)-γ, IL-10 and transforming growth factor (TGF)-β1 gene single nucleotide polymorphisms (SNP) were studied by polymerase chain reaction-sequence-specific primer in a group of individuals with the antecedent of DHF during a secondary infection in the sequence dengue 1/dengue 2. A control group was also included. TNF-α (-308) A allele and IL-10 (-1082/-819/-592) ACC/ATA haplotype were significantly associated with DHF. TNF-α (-308) GG and TGF-β1 (c25) GG genotypes were associated with protection. Our results suggest that genetic predisposition to a high TNF-α production and a low IL-10 production seems to increase the susceptibility to DHF during a secondary dengue 2 infection, whereas TGF-β1 high producers might be protected for developing DHF.
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Affiliation(s)
- Ana B Perez
- PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, Institute for Tropical Medicine Pedro Kouri, Havana, Cuba.
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41
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Bollati M, Alvarez K, Assenberg R, Baronti C, Canard B, Cook S, Coutard B, Decroly E, de Lamballerie X, Gould EA, Grard G, Grimes JM, Hilgenfeld R, Jansson AM, Malet H, Mancini EJ, Mastrangelo E, Mattevi A, Milani M, Moureau G, Neyts J, Owens RJ, Ren J, Selisko B, Speroni S, Steuber H, Stuart DI, Unge T, Bolognesi M. Structure and functionality in flavivirus NS-proteins: perspectives for drug design. Antiviral Res 2010; 87:125-48. [PMID: 19945487 PMCID: PMC3918146 DOI: 10.1016/j.antiviral.2009.11.009] [Citation(s) in RCA: 243] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2009] [Revised: 09/08/2009] [Accepted: 11/21/2009] [Indexed: 12/28/2022]
Abstract
Flaviviridae are small enveloped viruses hosting a positive-sense single-stranded RNA genome. Besides yellow fever virus, a landmark case in the history of virology, members of the Flavivirus genus, such as West Nile virus and dengue virus, are increasingly gaining attention due to their re-emergence and incidence in different areas of the world. Additional environmental and demographic considerations suggest that novel or known flaviviruses will continue to emerge in the future. Nevertheless, up to few years ago flaviviruses were considered low interest candidates for drug design. At the start of the European Union VIZIER Project, in 2004, just two crystal structures of protein domains from the flaviviral replication machinery were known. Such pioneering studies, however, indicated the flaviviral replication complex as a promising target for the development of antiviral compounds. Here we review structural and functional aspects emerging from the characterization of two main components (NS3 and NS5 proteins) of the flavivirus replication complex. Most of the reviewed results were achieved within the European Union VIZIER Project, and cover topics that span from viral genomics to structural biology and inhibition mechanisms. The ultimate aim of the reported approaches is to shed light on the design and development of antiviral drug leads.
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Affiliation(s)
- Michela Bollati
- Department of Biomolecular Sciences and Biotechnology, University of Milano, Via Celoria 26, 20133 Milano, Italy
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García G, Sierra B, Pérez AB, Aguirre E, Rosado I, Gonzalez N, Izquierdo A, Pupo M, Danay Díaz DR, Sánchez L, Marcheco B, Hirayama K, Guzmán MG. Asymptomatic dengue infection in a Cuban population confirms the protective role of the RR variant of the FcgammaRIIa polymorphism. Am J Trop Med Hyg 2010; 82:1153-6. [PMID: 20519616 DOI: 10.4269/ajtmh.2010.09-0353] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The role of human Fcgamma receptors (FcgammaR) has been recognized considerably over the last years. These receptors vary in their affinity for IgG subclasses and the intracellular signals elicited by them. Allelic variants of FcgammaR genes may influence the biological phagocyte activity, accounting for an inherited pre-disposition to disease. The specific FcgammaRIIa (CD32) contains a polymorphic variant (H/R131) that has been associated to a reduced risk for developing dengue hemorrhagic fever (DHF). Here, we investigated the role of this polymorphism in a very well-characterized group of Cuban individuals with antecedents of DHF, dengue fever (DF), or subclinical dengue infection. The HH131 genotype was significantly associated with dengue disease, either DF (*P = 0.016; odds ratio = 4.425; 95% confidence interval = 1.10-20.52) or DHF (P = 0.00018; odds ratio = 10.56; 95% confidence interval = 2.33-54.64) with respect to the subclinical infection.
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Affiliation(s)
- Gissel García
- Department of Virology, Tropical Medicine Institute "Pedro Kourí," Havana, Cuba.
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Guzman MG, Hermida L, Bernardo L, Ramirez R, Guillén G. Domain III of the envelope protein as a dengue vaccine target. Expert Rev Vaccines 2010; 9:137-47. [PMID: 20109025 DOI: 10.1586/erv.09.139] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A dengue vaccine should induce long-lasting, simultaneous protection to the four dengue viruses while avoiding the immune enhancement of viral infection. Domain III of the dengue envelope protein has been implicated in receptor binding, and is also the target of specific neutralizing antibodies. Domain III has emerged as a promising region for a subunit vaccine candidate. Here, we review the current state of knowledge on vaccine candidates based on domain III. Due to the results obtained concerning the immune response and protection in mice and monkeys, particular attention is paid to the chimeric protein domain III fused to p64k of Neisseria meningitidis.
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Affiliation(s)
- Maria G Guzman
- Department of Virology, PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, Pedro Kouri Tropical Medicine Institute, Autopista Novia del Mediodía, Km 6, Apdo 601, Marianao 13, Havana, Cuba.
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Sierra B, Perez AB, Vogt K, Garcia G, Schmolke K, Aguirre E, Alvarez M, Kern F, Kourí G, Volk HD, Guzman MG. Secondary heterologous dengue infection risk: Disequilibrium between immune regulation and inflammation? Cell Immunol 2010; 262:134-40. [PMID: 20219186 DOI: 10.1016/j.cellimm.2010.02.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2009] [Revised: 11/23/2009] [Accepted: 02/04/2010] [Indexed: 11/18/2022]
Abstract
Increased serum levels of cytokines released by cells of the immune response have been detected in patients suffering from dengue disease. Likewise, secondary infections by a different dengue virus serotype result in a highest risk of development of the severe dengue disease. Both findings suggest that the memory immune response is one of the key players in the pathogenesis of this disease. Here we take advantage of the particular Cuban epidemiological situation in dengue to analyze a broad spectrum of cell-mediated immune response mediators at mRNA and protein level. Evidences for a regulatory immune pattern in homologous (TGF-beta, IL-10) vs. pro-inflammatory pattern (IFN-gamma, TNF-alpha) in heterologous dengue virus re-challenge were found, suggesting a possible association with the higher incidence of severe dengue cases in the latter case.
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Affiliation(s)
- Beatriz Sierra
- Cellular Immunology Lab, Virology Department, PAHO/WHO Collaborating Center for the Study of Dengue and its Vector, Institute of Tropical Medicine, Pedro Kouri Autopista Novia del Mediodia, La Lisa, Ciudad Habana, Cuba.
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Assunção-Miranda I, Amaral FA, Bozza FA, Fagundes CT, Sousa LP, Souza DG, Pacheco P, Barbosa-Lima G, Gomes RN, Bozza PT, Da Poian AT, Teixeira MM, Bozza MT. Contribution of macrophage migration inhibitory factor to the pathogenesis of dengue virus infection. FASEB J 2009; 24:218-28. [PMID: 19776337 DOI: 10.1096/fj.09-139469] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dengue fever is an emerging viral disease transmitted by arthropods to humans in tropical countries. Dengue hemorrhagic fever (DHF) is escalating in frequency and mortality rates. Here we studied the involvement of macrophage migration inhibitory factor (MIF) in dengue virus (DENV) infection and its pathogenesis. Patients with DHF had elevated plasma concentrations of MIF. Both leukocytes from these patients and macrophages from healthy donors infected in vitro with DENV showed a substantial amount of MIF within lipid droplets. The secretion of MIF by macrophages and hepatocytes required a productive infection and occurred without an increase in gene transcription or cell death, thus indicating active secretion from preformed stocks. In vivo infection of wild-type and mif-deficient (Mif(-/-)) mice demonstrated a role of MIF in dengue pathogenesis. Clinical disease was less severe in Mif(-/-) mice, and they exhibited a significant delay in lethality, lower viremia, and lower viral load in the spleen than wild-type mice. This reduction in all parameters of severity on DENV infection in Mif(-/-) mice correlated with reduced proinflammatory cytokine concentrations. These results demonstrated the contribution of MIF to the pathogenesis of dengue and pointed to a possible beneficial role of neutralizing MIF as an adjunctive therapeutic approach to treat the severe forms of the disease.
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Affiliation(s)
- Iranaia Assunção-Miranda
- Programa de Biologia Estrutural, Departamento de Imunologia, Instituto de Microbiologia, CCS Bloco I, Universidade Federal do Rio de Janeiro, Avenida Carlos Chagas Filho 373, Cidade Universitária, Rio de Janeiro/RJ, 21941-902 Brazil
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Phage-displayed antibody fragments recognizing dengue 3 and dengue 4 viruses as tools for viral serotyping in sera from infected individuals. Arch Virol 2009; 154:1035-45. [PMID: 19504165 DOI: 10.1007/s00705-009-0401-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2008] [Accepted: 05/12/2009] [Indexed: 10/20/2022]
Abstract
The current study shows the usefulness of dengue-3- and dengue-4-specific phage-displayed antibody fragments as tools for viral detection and serotyping in sera from infected individuals. C6/36 HT cells were inoculated with acute-phase sera from patients, and supernatants were collected daily and analyzed by ELISA using phage-displayed antibody fragments as serotype-specific detector reagents. Serotyping of most samples was possible as early as two to three days postinoculation. Results were comparable with those obtained by indirect immunofluorescence assay but were obtained in a shorter period of time (<1 week). Phage-displayed antibody fragments were better tools for diagnosis and serotyping than their soluble counterparts. Our approach combines the advantages of viral isolation and ELISA techniques. These results could be the basis for the development of a high-throughput method for identifying dengue virus serotypes, which is crucial for the management and control of the disease.
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Resch W, Zaslavsky L, Kiryutin B, Rozanov M, Bao Y, Tatusova TA. Virus variation resources at the National Center for Biotechnology Information: dengue virus. BMC Microbiol 2009; 9:65. [PMID: 19341451 PMCID: PMC2675532 DOI: 10.1186/1471-2180-9-65] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 04/02/2009] [Indexed: 11/27/2022] Open
Abstract
Background There is an increasing number of complete and incomplete virus genome sequences available in public databases. This large body of sequence data harbors information about epidemiology, phylogeny, and virulence. Several specialized databases, such as the NCBI Influenza Virus Resource or the Los Alamos HIV database, offer sophisticated query interfaces along with integrated exploratory data analysis tools for individual virus species to facilitate extracting this information. Thus far, there has not been a comprehensive database for dengue virus, a significant public health threat. Results We have created an integrated web resource for dengue virus. The technology developed for the NCBI Influenza Virus Resource has been extended to process non-segmented dengue virus genomes. In order to allow efficient processing of the dengue genome, which is large in comparison with individual influenza segments, we developed an offline pre-alignment procedure which generates a multiple sequence alignment of all dengue sequences. The pre-calculated alignment is then used to rapidly create alignments of sequence subsets in response to user queries. This improvement in technology will also facilitate the incorporation of additional virus species in the future. The set of virus-specific databases at NCBI, which will be referred to as Virus Variation Resources (VVR), allow users to build complex queries against virus-specific databases and then apply exploratory data analysis tools to the results. The metadata is automatically collected where possible, and extended with data extracted from the literature. Conclusion The NCBI Dengue Virus Resource integrates dengue sequence information with relevant metadata (sample collection time and location, disease severity, serotype, sequenced genome region) and facilitates retrieval and preliminary analysis of dengue sequences using integrated web analysis and visualization tools.
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Affiliation(s)
- Wolfgang Resch
- National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bethesda, Maryland 20894, USA.
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