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Pintado Silva J, Fenutria R, Bernal-Rubio D, Sanchez-Martin I, Hunziker A, Chebishev E, Veloz J, Kelly G, Kim-Schulze S, Whitehead S, Durbin A, Ramos I, Fernandez-Sesma A. The dengue virus 4 component of NIAID's tetravalent TV003 vaccine drives its innate immune signature. Exp Biol Med (Maywood) 2022; 247:2201-2212. [PMID: 36734144 PMCID: PMC9899989 DOI: 10.1177/15353702231151241] [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] [Indexed: 02/04/2023] Open
Abstract
Annually, roughly 2.5 billion people are at risk for dengue virus (DENV) infection, and the incidence of infection has increased 30-fold since its discovery in the 1900s. At present, there are no globally licensed antiviral treatments or vaccines that protect against all four of the DENV serotypes. The NIAID Live Attenuated Tetravalent Vaccine (LATV) dengue vaccine candidate is composed of variants of three DENV serotypes attenuated by a 30 nucleotide (Δ30) deletion in the 3' untranslated region and a fourth component that is a chimeric virus in which the prM and E genes of DENV-2 replace those of DENV-4 on the rDEN4Δ30 backbone. The vaccine candidate encodes the non-structural proteins of DENV-1, DENV-3, and DENV-4, which could be of critical importance in the presentation of DENV-specific epitopes in a manner that facilitates antigen presentation and confers higher protection. Our findings demonstrate that the attenuation mechanism (Δ30) resulted in decreased viral infectivity and replication for each vaccine virus in monocyte-derived dendritic cells but were able to generate a robust innate immune response. When tested as monovalent viruses, DEN-4Δ30 displayed the most immunogenic profile. In addition, we found that the tetravalent DENV formulation induced a significantly greater innate immune response than the trivalent formulation. We demonstrate that the presence of two components with a DENV-4Δ30 backbone is necessary for the induction of RANTES, CD40, IP-10, and Type I IFN by the tetravalent formulation. Finally, we found that the DEN-4Δ30 backbone in the DENV-2 component of the vaccine enhanced its antigenic properties, as evidenced by enhanced ability to induce IP-10 and IFNα2 in monocyte-derived dendritic cells. In sum, our study shows that the Δ30 and Δ30/Δ31 mutations attenuate the DENV vaccine strains in terms of replication and infectivity while still allowing the induction of a robust innate immune response.
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Affiliation(s)
- Jessica Pintado Silva
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Graduate School of Biomedical
Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029,
USA
| | - Rafael Fenutria
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Dabeiba Bernal-Rubio
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Irene Sanchez-Martin
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Annika Hunziker
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Eva Chebishev
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Graduate School of Biomedical
Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029,
USA
| | - Jeury Veloz
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Graduate School of Biomedical
Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029,
USA
| | - Geoffrey Kelly
- Precision Immunology Institute,
Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Seunghee Kim-Schulze
- Precision Immunology Institute,
Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Steve Whitehead
- Department of Neurology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Laboratory of Viral Diseases
(LVD), NIAID, NIH, Rockville, MD 20852, USA
| | - Anna Durbin
- Precision Immunology Institute,
Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Division of Global Disease and
Epidemiology Control, Johns Hopkins Bloomberg School of Public Health,
Rockville, MD 20852, USA
| | - Irene Ramos
- Department of Neurology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Precision Immunology Institute,
Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Ana Fernandez-Sesma
- Department of Microbiology, Icahn
School of Medicine at Mount Sinai, New York, NY 10029, USA
- Graduate School of Biomedical
Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029,
USA
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Chesnut M, Muñoz LS, Harris G, Freeman D, Gama L, Pardo CA, Pamies D. In vitro and in silico Models to Study Mosquito-Borne Flavivirus Neuropathogenesis, Prevention, and Treatment. Front Cell Infect Microbiol 2019; 9:223. [PMID: 31338335 PMCID: PMC6629778 DOI: 10.3389/fcimb.2019.00223] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/11/2019] [Indexed: 01/07/2023] Open
Abstract
Mosquito-borne flaviviruses can cause disease in the nervous system, resulting in a significant burden of morbidity and mortality. Disease models are necessary to understand neuropathogenesis and identify potential therapeutics and vaccines. Non-human primates have been used extensively but present major challenges. Advances have also been made toward the development of humanized mouse models, but these models still do not fully represent human pathophysiology. Recent developments in stem cell technology and cell culture techniques have allowed the development of more physiologically relevant human cell-based models. In silico modeling has also allowed researchers to identify and predict transmission patterns and discover potential vaccine and therapeutic candidates. This review summarizes the research on in vitro and in silico models used to study three mosquito-borne flaviviruses that cause neurological disease in humans: West Nile, Dengue, and Zika. We also propose a roadmap for 21st century research on mosquito-borne flavivirus neuropathogenesis, prevention, and treatment.
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Affiliation(s)
- Megan Chesnut
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Laura S. Muñoz
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Georgina Harris
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Dana Freeman
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
| | - Lucio Gama
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, MD, United States
| | - Carlos A. Pardo
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, United States
- Neuroviruses Emerging in the Americas Study, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - David Pamies
- Center for Alternatives to Animal Testing, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, United States
- Department of Physiology, University of Lausanne, Lausanne, Switzerland
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3
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Oliveira AFCDS, Teixeira RR, Oliveira ASD, Souza APMD, Silva MLD, Paula SOD. Potential Antivirals: Natural Products Targeting Replication Enzymes of Dengue and Chikungunya Viruses. Molecules 2017; 22:E505. [PMID: 28327521 PMCID: PMC6155337 DOI: 10.3390/molecules22030505] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 03/09/2017] [Accepted: 03/17/2017] [Indexed: 11/16/2022] Open
Abstract
Dengue virus (DENV) and chikungunya virus (CHIKV) are reemergent arboviruses that are transmitted by mosquitoes of the Aedes genus. During the last several decades, these viruses have been responsible for millions of cases of infection and thousands of deaths worldwide. Therefore, several investigations were conducted over the past few years to find antiviral compounds for the treatment of DENV and CHIKV infections. One attractive strategy is the screening of compounds that target enzymes involved in the replication of both DENV and CHIKV. In this review, we describe advances in the evaluation of natural products targeting the enzymes involved in the replication of these viruses.
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Affiliation(s)
- Ana Flávia Costa da Silveira Oliveira
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
- Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas, 39900-000 Almenara, MG, Brazil.
| | - Róbson Ricardo Teixeira
- Departamento de Química, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
| | - André Silva de Oliveira
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
- Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas, 39900-000 Almenara, MG, Brazil.
| | - Ana Paula Martins de Souza
- Departamento de Química, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
| | - Milene Lopes da Silva
- Departamento de Química, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
| | - Sérgio Oliveira de Paula
- Departamento de Biologia Geral, Universidade Federal de Viçosa, Av. P.H. Rolfs, S/N, 36570-900 Viçosa, MG, Brazil.
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Abstract
Dengue is one of the most important vector-borne disease and an increasing problem worldwide because of current globalization trends. Roughly, half the world's population lives in dengue endemic countries, and nearly 100 million people are infected annually with dengue. India has the highest burden of the disease with 34% of the global cases. In the context of an expanding and potentially fatal infectious disease without effective prevention or specific treatment, the public health value of a protective vaccine is clear. There is no licensed dengue vaccine is available still, but several vaccines are under development. Keeping in view the rise in dengue prevalence globally, there is a need to increase clinical drug and vaccine research on dengue. This paper briefly reviews on the development and current status of dengue vaccine to provide information to policymakers, researchers, and public health experts to design and implement appropriate vaccine for prophylactic intervention.
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Affiliation(s)
- Priya Marimuthu
- Department of Pharmacology, SRM Medical College, Kattankulathur, Kanchipuram, Tamil Nadu, India
| | - Jamuna Rani Ravinder
- Department of Pharmacology, SRM Medical College, Kattankulathur, Kanchipuram, Tamil Nadu, India
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5
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Kirkpatrick BD, Durbin AP, Pierce KK, Carmolli MP, Tibery CM, Grier PL, Hynes N, Diehl SA, Elwood D, Jarvis AP, Sabundayo BP, Lyon CE, Larsson CJ, Jo M, Lovchik JM, Luke CJ, Walsh MC, Fraser EA, Subbarao K, Whitehead SS. Robust and Balanced Immune Responses to All 4 Dengue Virus Serotypes Following Administration of a Single Dose of a Live Attenuated Tetravalent Dengue Vaccine to Healthy, Flavivirus-Naive Adults. J Infect Dis 2015; 212:702-10. [PMID: 25801652 PMCID: PMC4612392 DOI: 10.1093/infdis/jiv082] [Citation(s) in RCA: 141] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 12/19/2014] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND The 4 serotypes of dengue virus, DENV-1-4, are the leading cause of arboviral disease globally. The ideal dengue vaccine would provide protection against all serotypes after a single dose. METHODS Two randomized, placebo-controlled trials were performed with 168 flavivirus-naive adults to demonstrate the safety and immunogenicity of a live attenuated tetravalent dengue vaccine (TV003), compared with those of a second tetravalent vaccine with an enhanced DENV-2 component (TV005), and to evaluate the benefit of a booster dose at 6 months. Safety data, viremia, and neutralizing antibody titers were evaluated. RESULTS A single dose of TV005 elicited a tetravalent response in 90% of vaccinees by 3 months after vaccination and a trivalent response in 98%. Compared with TV003, the higher-dose DENV-2 component increased the observed frequency of immunogenicity to DENV-2 in the TV005 trial. Both the first and second doses were well tolerated. Neither vaccine viremia, rash, nor a significant antibody boost were observed following a second dose. CONCLUSIONS A single subcutaneous dose of TV005 dengue vaccine is safe and induces a tetravalent antibody response at an unprecedented frequency among vaccinees. A second dose has limited benefit and appears to be unnecessary. Studies to confirm these findings and assess vaccine efficacy will now move to populations in regions where DENV transmission is endemic. CLINICAL TRIALS REGISTRATION NCT01072786 and NCT01436422.
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Affiliation(s)
- Beth D. Kirkpatrick
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Anna P. Durbin
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Kristen K. Pierce
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Marya P. Carmolli
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Cecilia M. Tibery
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Palmtama L. Grier
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Noreen Hynes
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Sean A. Diehl
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Dan Elwood
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Adrienne P. Jarvis
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Beulah P. Sabundayo
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Caroline E. Lyon
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Catherine J. Larsson
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Matthew Jo
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Janece M. Lovchik
- Center for Immunization Research, Johns Hopkins University School of Public Health,Baltimore
| | - Catherine J. Luke
- National Institutes of Allergy and Infectious Diseases, Bethesda, Maryland
| | - Mary C. Walsh
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Ellen A. Fraser
- Department of Medicine, Vaccine Testing Center, University of Vermont College of Medicine,Burlington
| | - Kanta Subbarao
- National Institutes of Allergy and Infectious Diseases, Bethesda, Maryland
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6
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Schwartz LM, Halloran ME, Durbin AP, Longini IM. The dengue vaccine pipeline: Implications for the future of dengue control. Vaccine 2015; 33:3293-8. [PMID: 25989449 PMCID: PMC4470297 DOI: 10.1016/j.vaccine.2015.05.010] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 01/14/2023]
Abstract
Dengue has become the most rapidly expanding mosquito-borne infectious disease on the planet, surpassing malaria and infecting at least 390 million people per year. There is no effective treatment for dengue illness other than supportive care, especially for severe cases. Symptoms can be mild or life-threatening as in dengue hemorrhagic fever and dengue shock syndrome. Vector control has been only partially successful in decreasing dengue transmission. The potential use of safe and effective tetravalent dengue vaccines is an attractive addition to prevent disease or minimize the possibility of epidemics. There are currently no licensed dengue vaccines. This review summarizes the current status of all dengue vaccine candidates in clinical evaluation. Currently five candidate vaccines are in human clinical trials. One has completed two Phase III trials, two are in Phase II trials, and three are in Phase I testing.
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Affiliation(s)
- Lauren M Schwartz
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA; Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
| | - M Elizabeth Halloran
- Department of Biostatistics, School of Public Health, University of Washington, Seattle, WA, USA; Vaccine and Infectious Diseases Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA; Center for Inference and Dynamics of Infectious Diseases, Seattle, WA, USA
| | - Anna P Durbin
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ira M Longini
- Center for Inference and Dynamics of Infectious Diseases, Seattle, WA, USA; Department of Biostatistics, College of Public Health and Health Professions and College of Medicine, University of Florida, Gainesville, FL, USA
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7
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Wei J, Chen H, An J. Recent progress in dengue vaccine development. Virol Sin 2014; 29:353-63. [PMID: 25547681 PMCID: PMC8206420 DOI: 10.1007/s12250-014-3542-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 12/16/2014] [Indexed: 10/24/2022] Open
Abstract
Dengue virus (DENV) has four distinct serotypes. DENV infection can result in classic dengue fever and life-threatening dengue hemorrhagic fever/dengue shock syndrome. In recent decades, DENV infection has become an important public health concern in epidemic-prone areas. Vaccination is the most effective measure to prevent and control viral infections. However, several challenges impede the development of effective DENV vaccines, such as the lack of suitable animal models and the antibody-dependent enhancement phenomenon. Although no licensed DENV vaccine is available, significant progress has been made. This review summarizes candidate DENV vaccines from recent investigations.
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Affiliation(s)
- Jianchun Wei
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Hui Chen
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
| | - Jing An
- Department of Microbiology, School of Basic Medical Sciences, Capital Medical University, Beijing, 100069 China
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8
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Advances in the understanding, management, and prevention of dengue. J Clin Virol 2014; 64:153-9. [PMID: 25453329 DOI: 10.1016/j.jcv.2014.08.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 08/25/2014] [Indexed: 01/09/2023]
Abstract
Dengue causes more human morbidity globally than any other vector-borne viral disease. Recent research has led to improved epidemiological methods that predict disease burden and factors involved in transmission, a better understanding of immune responses in infection, and enhanced animal models. In addition, a number of control measures, including preventative vaccines, are in clinical trials. However, significant gaps remain, including the need for better surveillance in large parts of the world, methods to predict which individuals will develop severe disease, and immunologic correlates of protection against dengue illness. During the next decade, dengue will likely expand its geographic reach and become an increasing burden on health resources in affected areas. Licensed vaccines and antiviral agents are needed in order to effectively control dengue and limit disease.
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Osorio JE, Velez ID, Thomson C, Lopez L, Jimenez A, Haller AA, Silengo S, Scott J, Boroughs KL, Stovall JL, Luy BE, Arguello J, Beatty ME, Santangelo J, Gordon GS, Huang CYH, Stinchcomb DT. Safety and immunogenicity of a recombinant live attenuated tetravalent dengue vaccine (DENVax) in flavivirus-naive healthy adults in Colombia: a randomised, placebo-controlled, phase 1 study. THE LANCET. INFECTIOUS DISEASES 2014; 14:830-8. [PMID: 25087476 PMCID: PMC4648257 DOI: 10.1016/s1473-3099(14)70811-4] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Dengue virus is the most serious mosquito-borne viral threat to public health and no vaccines or antiviral therapies are approved for dengue fever. The tetravalent DENVax vaccine contains a molecularly characterised live attenuated dengue serotype-2 virus (DENVax-2) and three recombinant vaccine viruses expressing the prM and E structural genes for serotypes 1, 3, and 4 in the DENVax-2 genetic backbone. We aimed to assess the safety and immunogenicity of tetravalent DENVax formulations. METHODS We undertook a randomised, double-blind, phase 1, dose-escalation trial between Oct 11, 2011, and Nov 9, 2011, in the Rionegro, Antioquia, Colombia. The first cohort of participants (aged 18-45 years) were randomly assigned centrally, via block randomisation, to receive a low-dose formulation of DENvax, or placebo, by either subcutaneous or intradermal administration. After a safety assessment, participants were randomly assigned to receive a high-dose DENVax formulation, or placebo, by subcutaneous or intradermal administration. Group assignment was not masked from study pharmacists, but allocation was concealed from participants, nurses, and investigators. Primary endpoints were frequency and severity of injection-site and systemic reactions within 28 days of each vaccination. Secondary endpoints were the immunogenicity of DENVax against all four dengue virus serotypes, and the viraemia due to each of the four vaccine components after immunisation. Analysis was by intention to treat for safety and per protocol for immunogenicity. Because of the small sample size, no detailed comparison of adverse event rates were warranted. The trial is registered with ClinicalTrials.gov, number NCT01224639. FINDINGS We randomly assigned 96 patients to one of the four study groups: 40 participants (42%) received low-dose vaccine and eight participants (8%) received placebo in the low-dose groups; 39 participants (41%) received high-dose vaccine, with nine (9%) participants assigned to receive placebo. Both formulations were well tolerated with mostly mild and transient local or systemic reactions. No clinically meaningful differences were recorded in the overall incidence of local and systemic adverse events between patients in the vaccine and placebo groups; 68 (86%) of 79 participants in the vaccine groups had solicited systemic adverse events compared with 13 (76%) of 17 of those in the placebo groups. By contrast, 67 participants (85%) in the vaccine group had local solicited reactions compared with five (29%) participants in the placebo group. Immunisation with either high-dose or low-dose DENVax formulations induced neutralising antibody responses to all four dengue virus serotypes; 30 days after the second dose, 47 (62%) of 76 participants given vaccine seroconverted to all four serotypes and 73 (96%) participants seroconverted to three or more dengue viruses. Infectious DENVax viruses were detected in only ten (25%) of 40 participants in the low-dose group and 13 (33%) of 39 participants in the high-dose group. INTERPRETATION Our findings emphasise the acceptable tolerability and immunogenicity of the tetravalent DENVax formulations in healthy, flavivirus-naive adults. Further clinical testing of DENVax in different age groups and in dengue-endemic areas is warranted. FUNDING Takeda Vaccines.
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Affiliation(s)
| | - Ivan D Velez
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Universidad de Antioquia, Medellín, Colombia
| | | | - Liliana Lopez
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Universidad de Antioquia, Medellín, Colombia
| | - Alejandra Jimenez
- Programa de Estudio y Control de Enfermedades Tropicales (PECET), Universidad de Antioquia, Medellín, Colombia
| | | | | | | | - Karen L Boroughs
- Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Janae L Stovall
- Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | - Betty E Luy
- Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
| | | | | | | | | | - Claire Y-H Huang
- Division of Vector Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, USA
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10
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Teixeira RR, Pereira WL, Oliveira AFCDS, da Silva AM, de Oliveira AS, da Silva ML, da Silva CC, de Paula SO. Natural products as source of potential dengue antivirals. Molecules 2014; 19:8151-76. [PMID: 24941340 PMCID: PMC6271820 DOI: 10.3390/molecules19068151] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 06/04/2014] [Accepted: 06/05/2014] [Indexed: 12/28/2022] Open
Abstract
Dengue is a neglected disease responsible for 22,000 deaths each year in areas where it is endemic. To date, there is no clinically approved dengue vaccine or antiviral for human beings, even though there have been great efforts to accomplish these goals. Several approaches have been used in the search for dengue antivirals such as screening of compounds against dengue virus enzymes and structure-based computational discovery. During the last decades, researchers have turned their attention to nature, trying to identify compounds that can be used as dengue antivirals. Nature represents a vast reservoir of substances that can be explored with the aim of discovering new leads that can be either used directly as pharmaceuticals or can serve as lead structures that can be optimized towards the development of new antiviral agents against dengue. In this review we describe an assortment of natural products that have been reported as possessing dengue antiviral activity. The natural products are organized into classes of substances. When appropriate, structure-activity relationships are outlined. The biological assays used to assess antiviral activity are briefly described.
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Affiliation(s)
| | - Wagner Luiz Pereira
- Departamento de Química, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
| | | | | | - André Silva de Oliveira
- Instituto Federal de Educação, Ciência e Tecnologia do Norte de Minas, 39900-000 Almenara, MG, Brazil
| | - Milene Lopes da Silva
- Departamento de Química, Universidade Federal de Viçosa, 36570-900 Viçosa, MG, Brazil
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11
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Yildiz M, Ghosh S, Bell JA, Sherman W, Hardy JA. Allosteric inhibition of the NS2B-NS3 protease from dengue virus. ACS Chem Biol 2013; 8:2744-52. [PMID: 24164286 DOI: 10.1021/cb400612h] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dengue virus is the flavivirus that causes dengue fever, dengue hemorrhagic disease, and dengue shock syndrome, which are currently increasing in incidence worldwide. Dengue virus protease (NS2B-NS3pro) is essential for dengue virus infection and is thus a target of therapeutic interest. To date, attention has focused on developing active-site inhibitors of NS2B-NS3pro. The flat and charged nature of the NS2B-NS3pro active site may contribute to difficulties in developing inhibitors and suggests that a strategy of identifying allosteric sites may be useful. We report an approach that allowed us to scan the NS2B-NS3pro surface by cysteine mutagenesis and use cysteine reactive probes to identify regions of the protein that are susceptible to allosteric inhibition. This method identified a new allosteric site utilizing a circumscribed panel of just eight cysteine variants and only five cysteine reactive probes. The allosterically sensitive site is centered at Ala125, between the 120s loop and the 150s loop. The crystal structures of WT and modified NS2B-NS3pro demonstrate that the 120s loop is flexible. Our work suggests that binding at this site prevents a conformational rearrangement of the NS2B region of the protein, which is required for activation. Preventing this movement locks the protein into the open, inactive conformation, suggesting that this site may be useful in the future development of therapeutic allosteric inhibitors.
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Affiliation(s)
- Muslum Yildiz
- Department
of Chemistry, University of Massachusetts, 104 LGRT, 710 N. Pleasant St., Amherst, Massachussetts 01003, United States
| | - Sumana Ghosh
- Department
of Chemistry, University of Massachusetts, 104 LGRT, 710 N. Pleasant St., Amherst, Massachussetts 01003, United States
| | - Jeffrey A. Bell
- Schrödinger, LLC, 120 West 45th Street, New York, New York 10036, United States
| | - Woody Sherman
- Schrödinger, LLC, 120 West 45th Street, New York, New York 10036, United States
| | - Jeanne A. Hardy
- Department
of Chemistry, University of Massachusetts, 104 LGRT, 710 N. Pleasant St., Amherst, Massachussetts 01003, United States
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McArthur MA, Sztein MB, Edelman R. Dengue vaccines: recent developments, ongoing challenges and current candidates. Expert Rev Vaccines 2013; 12:933-53. [PMID: 23984962 PMCID: PMC3773977 DOI: 10.1586/14760584.2013.815412] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Dengue is among the most prevalent and important arbovirus diseases of humans. To effectively control this rapidly spreading disease, control of the vector mosquito and a safe and efficacious vaccine are critical. Despite considerable efforts, the development of a successful vaccine has remained elusive. Multiple factors have complicated the creation of a successful vaccine, not the least of which are the complex, immune-mediated responses against four antigenically distinct serotypes necessitating a tetravalent vaccine providing long-lasting protective immunity. Despite the multiple impediments, there are currently many promising vaccine candidates in preclinical and clinical development. Here, the recent advances in dengue virus vaccine development are reviewed and the challenges associated with the use of these vaccines as a public health tool are briefly discussed.
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Affiliation(s)
- Monica A. McArthur
- Department of Pediatrics, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
- Center for Vaccine Development, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
| | - Marcelo B. Sztein
- Department of Pediatrics, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
- Center for Vaccine Development, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
| | - Robert Edelman
- Department of Medicine, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
- Center for Vaccine Development, University of Maryland School of Medicine, 685 West Baltimore Street, Room 480, Baltimore, MD 21201, USA
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Lindow JC, Durbin AP, Whitehead SS, Pierce KK, Carmolli MP, Kirkpatrick BD. Vaccination of volunteers with low-dose, live-attenuated, dengue viruses leads to serotype-specific immunologic and virologic profiles. Vaccine 2013; 31:3347-52. [PMID: 23735680 PMCID: PMC3777849 DOI: 10.1016/j.vaccine.2013.05.075] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 05/01/2013] [Accepted: 05/20/2013] [Indexed: 10/26/2022]
Abstract
There are currently no vaccines or therapeutics to prevent dengue disease which ranges in severity from asymptomatic infections to life-threatening illness. The National Institute of Allergy and Infectious Diseases (NIAID) Division of Intramural Research has developed live, attenuated vaccines to each of the four dengue serotypes (DENV-1-DENV-4). Two doses (10PFU and 1000PFU) of three monovalent vaccines were tested in human clinical trials to compare safety and immunogenicity profiles. DEN4Δ30 had been tested previously at multiple doses. The three dengue vaccine candidates tested (DEN1Δ30, DEN2/4Δ30, and DEN3Δ30/31) were very infectious, each with a human infectious dose 50%≤ 10PFU. Further, infectivity rates ranged from 90 to 100% regardless of dose, excepting DEN2/4Δ30 which dropped from 100% at the 1000PFU dose to 60% at the 10PFU dose. Mean geometric peak antibody titers did not differ significantly between doses for DEN1Δ30 (92 ± 19 vs. 214 ± 97, p=0.08); however, significant differences were observed between the 10PFU and 1000PFU doses for DEN2/4Δ30, 19 ± 9 vs. 102 ± 25 (p=0.001), and DEN3Δ30/31, 119 ± 135 vs. 50 ± 50 (p=0.046). No differences in the incidences of rash, neutropenia, or viremia were observed between doses for any vaccines, though the mean peak titer of viremia for DEN1Δ30 was higher at the 1000PFU dose (0.5 ± 0 vs. 1.1 ± 0.1, p=0.007). These data demonstrate that a target dose of 1000PFU for inclusion of each dengue serotype into a tetravalent vaccine is likely to be safe and generate a balanced immune response for all serotypes.
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Affiliation(s)
- Janet C Lindow
- University of Vermont College of Medicine, Vaccine Testing Center and Unit of Infectious Diseases, 95 Carrigan Drive, Stafford Hall 110, Burlington, VT, USA
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Douglas DL, DeRoeck DA, Mahoney RT, Wichmann O. Will dengue vaccines be used in the public sector and if so, how? Findings from an 8-country survey of policymakers and opinion leaders. PLoS Negl Trop Dis 2013; 7:e2127. [PMID: 23516658 PMCID: PMC3597493 DOI: 10.1371/journal.pntd.0002127] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 02/08/2013] [Indexed: 11/24/2022] Open
Abstract
Background A face-to-face survey of 158 policymakers and other influential professionals was conducted in eight dengue-endemic countries in Asia (India, Sri Lanka, Thailand, Vietnam) and Latin America (Brazil, Colombia, Mexico, Nicaragua) to provide an indication of the potential demand for dengue vaccination in endemic countries, and to anticipate their research and other requirements in order to make decisions about the introduction of dengue vaccines. The study took place in anticipation of the licensure of the first dengue vaccine in the next several years. Methods/Principal Findings Semi-structured interviews were conducted on an individual or small group basis with government health officials, research scientists, medical association officers, vaccine producers, local-level health authorities, and others considered to have a role in influencing decisions about dengue control and vaccines. Most informants across countries considered dengue a priority disease and expressed interest in the public sector use of dengue vaccines, with a major driver being the political pressure from the public and the medical community to control the disease. There was interest in a vaccine that protects children as young as possible and that can fit into existing childhood immunization schedules. Dengue vaccination in most countries surveyed will likely be targeted to high-risk areas and begin with routine immunization of infants and young children, followed by catch-up campaigns for older age groups, as funding permits. Key data requirements for decision-making were additional local dengue surveillance data, vaccine cost-effectiveness estimates, post-marketing safety surveillance data and, in some countries vaccine safety and immunogenicity data in the local population. Conclusions/Significance The lookout for the public sector use of dengue vaccines in the eight countries appears quite favorable. Major determinants of whether and when countries will introduce dengue vaccines include whether WHO recommends the vaccines, their price, the availability of external financing for lower income countries, and whether they can be incorporated into countries' routine immunization schedules. Information gleaned from surveys of country-level policymakers and other opinion leaders can assist in planning the development, production and introduction of new or upcoming vaccines into public sector immunization programs. In the case of dengue vaccines, prevailing views among these leaders about the importance of the disease, their expressed level of interest in the government's use of the vaccine, and preferred strategies for vaccine introduction (e.g., geographically-targeted vs. nation-wide vaccination, specific age groups to target) can help to identify “early adopter” countries and indicate the level of demand for the vaccine. This information can be critical to current producers of the vaccine in planning their production capacity and to potential future producers in deciding whether to pursue development of the vaccine. This information also helps donors and international technical agencies, such as WHO and UNICEF, in setting their priorities and determining their level of technical and financial support to countries for the introduction of dengue vaccines. In addition, these surveys can provide crucial information to national governments and the above stakeholders about potential barriers to introducing dengue vaccines into national immunization programs, and what additional studies and data countries will require in order to make decisions about use of the vaccines in the public sector.
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Affiliation(s)
- Don L. Douglas
- DKT Janani, Reshmi Complex, P&T Colony, Kidwaipuri, Patna, India
| | - Denise A. DeRoeck
- International Vaccine Institute, Kwanak-gu, Seoul, South Korea
- * E-mail:
| | | | - Ole Wichmann
- Robert Koch Institute, Immunization Unit, DGZ-Ring1, Berlin, Germany
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Lee HC, Butler M, Wu SC. Using recombinant DNA technology for the development of live-attenuated dengue vaccines. Enzyme Microb Technol 2012; 51:67-72. [DOI: 10.1016/j.enzmictec.2012.05.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 05/13/2012] [Accepted: 05/14/2012] [Indexed: 12/19/2022]
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16
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Konishi E, Miyagawa Y. Balance of infection-enhancing and neutralizing antibodies induced by a dengue tetravalent DNA vaccine in a mouse model. Microbes Infect 2011; 13:1091-8. [DOI: 10.1016/j.micinf.2011.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 05/22/2011] [Accepted: 06/10/2011] [Indexed: 11/26/2022]
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Abstract
Dengue fever (DF) and dengue hemorrhagic fever (DHF) are mosquito-transmitted diseases of global importance. Despite significant research efforts, no approved vaccines or antiviral drugs against these diseases are currently available. This brief article reviews the status of dengue vaccine development, with particular emphasis on the vaccine strategies in more advanced stages of evaluation; these include traditional attenuation, chimerization and engineered attenuation. Several aspects of these vaccine design strategies, including concerns about vaccine candidates inducing infection-enhancing antibodies, are also presented.
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Affiliation(s)
- Eiji Konishi
- Division of Infectious Diseases, Department of International Health, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe 654-0412, Japan
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18
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Next generation dengue vaccines: a review of candidates in preclinical development. Vaccine 2011; 29:7276-84. [PMID: 21781998 DOI: 10.1016/j.vaccine.2011.07.017] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Revised: 06/22/2011] [Accepted: 07/06/2011] [Indexed: 11/21/2022]
Abstract
Dengue represents a major public health problem of growing global importance. In the absence of specific dengue therapeutics, strategies for disease control have increasingly focused on the development of dengue vaccines. While a licensed dengue vaccine is not yet available, several vaccine candidates are currently being evaluated in clinical trials and are described in detail in accompanying articles. In addition, there are a large variety of candidates in preclinical development, which are based on diverse technologies, ensuring a continued influx of innovation into the development pipeline. Potentially, some of the current preclinical candidates may become next generation dengue vaccines with superior product profiles. This review provides an overview of the various technological approaches to dengue vaccine development and specifically focuses on candidates in preclinical development.
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Durbin AP, Kirkpatrick BD, Pierce KK, Schmidt AC, Whitehead SS. Development and clinical evaluation of multiple investigational monovalent DENV vaccines to identify components for inclusion in a live attenuated tetravalent DENV vaccine. Vaccine 2011; 29:7242-50. [PMID: 21781997 DOI: 10.1016/j.vaccine.2011.07.023] [Citation(s) in RCA: 91] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 06/29/2011] [Accepted: 07/06/2011] [Indexed: 11/26/2022]
Abstract
The Laboratory of Infectious Diseases at the National Institute of Allergy and Infectious Diseases, National Institutes of Health has been engaged in an effort to develop a safe, efficacious, and affordable live attenuated tetravalent dengue vaccine (LATV) for more than ten years. Numerous recombinant monovalent DENV vaccine candidates have been evaluated in the SCID-HuH-7 mouse and in rhesus macaques to identify those candidates with a suitable attenuation phenotype. In addition, the ability of these candidates to infect and disseminate in Aedes mosquitoes had also been determined. Those candidates that were suitably attenuated in SCID-HuH-7 mice, rhesus macaques, and mosquitoes were selected for further evaluation in humans. This review will describe the generation of multiple candidate vaccines directed against each DENV serotype, the preclinical and clinical evaluation of these candidates, and the process of selecting suitable candidates for inclusion in a LATV dengue vaccine.
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Affiliation(s)
- Anna P Durbin
- Center for Immunization Research, Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, United States.
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20
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Kanagaraj AP, Verma D, Daniell H. Expression of dengue-3 premembrane and envelope polyprotein in lettuce chloroplasts. PLANT MOLECULAR BIOLOGY 2011; 76:323-33. [PMID: 21431782 PMCID: PMC3468899 DOI: 10.1007/s11103-011-9766-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Accepted: 03/07/2011] [Indexed: 05/22/2023]
Abstract
Dengue is an acute febrile viral disease with >100 million infections occurring each year and more than half of the world population is at risk. Global resurgence of dengue in many urban centers of the tropics is a major concern. Therefore, development of a successful vaccine is urgently needed that is economical and provide long-lasting protection from dengue virus infections. In this manuscript, we report expression of dengue-3 serotype polyprotein (prM/E) consisting of part of capsid, complete premembrane (prM) and truncated envelope (E) protein in an edible crop lettuce. The dengue sequence was controlled by endogenous Lactuca sativa psbA regulatory elements. PCR and Southern blot analysis confirmed transgene integration into the lettuce chloroplast genome via homologous recombination at the trnI/trnA intergenic spacer region. Western blot analysis showed expression of polyprotein prM/E in different forms as monomers (~65 kDa) or possibly heterodimers (~130 kDa) or multimers. Multimers were solubilized into monomers using guanidine hydrochloride. Transplastomic lettuce plants expressing dengue prM/E vaccine antigens grew normally and transgenes were inherited in the T1 progeny without any segregation. Transmission electron microscopy showed the presence of virus-like particles of ~20 nm diameter in chloroplast extracts of transplastomic lettuce expressing prM/E proteins, but not in untransformed plants. The prM/E antigens expressed in lettuce chloroplasts should offer a potential source for investigating an oral Dengue vaccine.
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Affiliation(s)
- Anderson Paul Kanagaraj
- Department of Molecular Biology and Microbiology, College of Medicine, University of Central Florida, 336 Biomolecular Science Building, Orlando, FL 32816-2364, USA
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Abstract
Dengue virus (DENV) is a mosquito-borne member of the Flavivirus genus and includes four serotypes (DENV-1, DENV-2, DENV-3, and DENV-4), each of which is capable of causing dengue fever and dengue hemorrhagic fever/dengue shock syndrome. Serious disease can be seen during primary infection but is more frequent following second infection with a serotype different from that of a previous infection. Infection with wild-type DENV induces high-titered neutralizing antibody that can provide long-term immunity to the homotypic virus and can provide short-term immunity (only several months duration) to a heterotypic DENV. The high level of virus replication seen during both secondary infection with a heterotypic virus and during primary DENV infection in late infancy is a direct consequence of antibody-dependent enhancement of replication. This enhanced virus replication is mediated primarily by preexisting, nonneutralizing, or subneutralizing antibodies to the virion surface antigens that enhance access of the virion-antibody complex to FcγR-bearing cells. Vaccines will need to provide long-term protection against each of the four DENV serotypes by inducing neutralizing antibodies, and live, attenuated and various nonliving virus vaccines are in development.
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Affiliation(s)
- Brian R Murphy
- Laboratory of Infectious Diseases, National Institutes of Allergy and Infectious Diseases, Bethesda, Maryland 20892, USA
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22
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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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23
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Guzman MG, Halstead SB, Artsob H, Buchy P, Farrar J, Gubler DJ, Hunsperger E, Kroeger A, Margolis HS, Martínez E, Nathan MB, Pelegrino JL, Simmons C, Yoksan S, Peeling RW. Dengue: a continuing global threat. Nat Rev Microbiol 2011; 8:S7-16. [PMID: 21079655 DOI: 10.1038/nrmicro2460] [Citation(s) in RCA: 1212] [Impact Index Per Article: 93.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Dengue fever and dengue haemorrhagic fever are important arthropod-borne viral diseases. Each year, there are ∼50 million dengue infections and ∼500,000 individuals are hospitalized with dengue haemorrhagic fever, mainly in Southeast Asia, the Pacific and the Americas. Illness is produced by any of the four dengue virus serotypes. A global strategy aimed at increasing the capacity for surveillance and outbreak response, changing behaviours and reducing the disease burden using integrated vector management in conjunction with early and accurate diagnosis has been advocated. Antiviral drugs and vaccines that are currently under development could also make an important contribution to dengue control in the future.
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Affiliation(s)
- Maria G Guzman
- Instituto de Medicina Tropical, 'Pedro Kouri', PO Box 601, Marianao 13, Ciucad de la Habana, Cuba
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24
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Coller BAG, Clements DE. Dengue vaccines: progress and challenges. Curr Opin Immunol 2011; 23:391-8. [PMID: 21514129 DOI: 10.1016/j.coi.2011.03.005] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 03/21/2011] [Accepted: 03/23/2011] [Indexed: 10/18/2022]
Abstract
With several dengue vaccine candidates progressing through clinical trials, several options for controlling this disease appear feasible. This would represent a major achievement and reflect decades of research and development activities. The challenges associated with the limited understanding of protective responses and those factors which determine disease severity remain, but with prospective studies ongoing in various dengue endemic areas and the initiation of dengue vaccine efficacy trials, immune responses are being evaluated in the context of protection and severe disease and these studies are highly likely to provide additional insights.
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Affiliation(s)
- Beth-Ann G Coller
- Vaccines Research, WP17-2131, Merck and Company, 770 Sumneytown Pike, P.O. Box 4, West Point, PA 19486, United States.
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Thomas SJ. The necessity and quandaries of dengue vaccine development. J Infect Dis 2011; 203:299-303. [PMID: 21208919 PMCID: PMC3071120 DOI: 10.1093/infdis/jiq060] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 10/26/2010] [Indexed: 11/13/2022] Open
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Evaluation of a prototype dengue-1 DNA vaccine in a Phase 1 clinical trial. Vaccine 2011; 29:960-8. [DOI: 10.1016/j.vaccine.2010.11.050] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2010] [Accepted: 11/15/2010] [Indexed: 11/19/2022]
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Murrell S, Wu SC, Butler M. Review of dengue virus and the development of a vaccine. Biotechnol Adv 2010; 29:239-47. [PMID: 21146601 DOI: 10.1016/j.biotechadv.2010.11.008] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 11/28/2010] [Accepted: 11/29/2010] [Indexed: 01/28/2023]
Abstract
Dengue viral infection has become an increasing global health concern with over two-fifths of the world's population at risk of infection. It is the most rapidly spreading vector borne disease, attributed to changing demographics, urbanization, environment, and global travel. It continues to be a threat in over 100 tropical and sub-tropical countries, affecting predominantly children. Dengue also carries a hefty financial burden on the health care systems in affected areas, as those infected seek care for their symptoms. The search for a suitable vaccine for dengue has been ongoing for the last sixty years, yet any effective treatment or vaccine remains elusive. A vaccine must be protective for all four serotypes of dengue and be cost-effective. Many approaches to developing candidate vaccines have been employed. The candidates include live attenuated tetravalent vaccines, chimeric tetravalent vaccines based on attenuated dengue virus or Yellow Fever 17D, and recombinant DNA vaccines based on flavivirus and non-flavivirus vectors. This review outlines the challenges involved in dengue vaccine development and presents the current stages of proposed vaccine candidate development.
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Affiliation(s)
- Sarah Murrell
- Department of Microbiology, University of Manitoba, Winnipeg, Manitoba, Canada
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28
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A molecular evaluation of dengue virus pathogenesis and its latest vaccine strategies. Mol Biol Rep 2010; 38:3731-40. [PMID: 21107723 DOI: 10.1007/s11033-010-0488-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Accepted: 11/09/2010] [Indexed: 10/18/2022]
Abstract
More than one third of the world's population living in tropical and subtropical areas of the world is at risk of dengue infections and as many as 100 million people are yearly infected. This disease has reemerged during the past 20 years in the form of an epidemic. Dengue is caused by one of four related serotypes of dengue virus and often leads to severe forms of the disease, resulting commonly from secondary infections. Dengue virus is a mosquito borne virus, belongs to the family Flaviviridae and consists of a single stranded positive sense RNA genome. Like other RNA viruses it escapes defense mechanisms and neutralization attempts by mutations, which make it more resistant and adaptable to its environment. Antiviral strategies and vaccine development is thus impaired and hence to date there is no licensed vaccine available for dengue virus. Here we discuss various efforts made towards the identification of potential vaccine targets for dengue as well as various strategies employed by research groups/pharmaceutical companies towards the development of a successful dengue vaccine.
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