101
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Harapan H, Michie A, Sasmono RT, Imrie A. Dengue: A Minireview. Viruses 2020; 12:v12080829. [PMID: 32751561 PMCID: PMC7472303 DOI: 10.3390/v12080829] [Citation(s) in RCA: 139] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 06/14/2020] [Accepted: 06/23/2020] [Indexed: 12/24/2022] Open
Abstract
Dengue, caused by infection of any of four dengue virus serotypes (DENV-1 to DENV-4), is a mosquito-borne disease of major public health concern associated with significant morbidity, mortality, and economic cost, particularly in developing countries. Dengue incidence has increased 30-fold in the last 50 years and over 50% of the world’s population, in more than 100 countries, live in areas at risk of DENV infection. We reviews DENV biology, epidemiology, transmission dynamics including circulating serotypes and genotypes, the immune response, the pathogenesis of the disease as well as updated diagnostic methods, treatments, vector control and vaccine developments.
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Affiliation(s)
- Harapan Harapan
- Medical Research Unit, School of Medicine, Universitas Syiah Kuala, Banda Aceh, Aceh 23111, Indonesia
- Department of Microbiology, School of Medicine, Universitas Syiah Kuala, Banda Aceh, Aceh 23111, Indonesia
- Tropical Disease Centre, School of Medicine, Universitas Syiah Kuala, Banda Aceh, Aceh 23111, Indonesia
- School of Biomedical Sciences, University of Western Australia, Nedlands, WA 6009, Australia;
- Correspondence: (H.H.); (A.I.); Tel.: +62-(0)-651-7551843 (H.H.)
| | - Alice Michie
- School of Biomedical Sciences, University of Western Australia, Nedlands, WA 6009, Australia;
| | - R. Tedjo Sasmono
- Eijkman Institute for Molecular Biology, Jakarta 10430, Indonesia;
| | - Allison Imrie
- School of Biomedical Sciences, University of Western Australia, Nedlands, WA 6009, Australia;
- Correspondence: (H.H.); (A.I.); Tel.: +62-(0)-651-7551843 (H.H.)
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102
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Prajapati S, Napit R, Bastola A, Rauniyar R, Shrestha S, Lamsal M, Adhikari A, Bhandari P, Yadav SR, Manandhar KD. Molecular phylogeny and distribution of dengue virus serotypes circulating in Nepal in 2017. PLoS One 2020; 15:e0234929. [PMID: 32634137 PMCID: PMC7340289 DOI: 10.1371/journal.pone.0234929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/04/2020] [Indexed: 11/23/2022] Open
Abstract
Dengue virus (DENV) infection is endemic in Nepal. Although infection rates are reported annually, little information is available about the circulating viral serotypes and genotypes. Here, we report the results of a multicentre cross-sectional study of DENV serotypes and genotypes sampled from individuals with suspected DENV infection in Nepal in 2017. Of the 50 patients sampled, 40 were serologically positive for DENV NS1, 29 for anti-DENV IgM, 21 for anti-DENV IgG and 14 were positive by qRT-PCR. The three serotypes DENV-1, 2 and 3 were detected and there was no DENV-4. Positive samples from serotyping were subjected to PCR amplification by envelope (E) gene specific primer and subsequent bidirectional sequencing of 5 samples. A time to most recent common ancestor phylogenetic tree was constructed from the new sequences obtained here together with historical DENV-1 and DENV-2 E gene sequences. The DENV-1 isolates (n = 2) from Nepalese individuals were closely related to Indian genotype V, whereas DENV-2 isolates (n = 3) belonged to Cosmopolitan genotype IVa, which is closely related to Indonesian isolates. Historical DENV isolates obtained between 2004 and 2013 clustered with Cosmopolitan IVb, Cosmopolitan IVa, and Asian II genotypes. All Nepalese isolates had different lineages with distinct ancestries. With the exception of isolates obtained in 2004, all other previously published isolates had ancestry to geographically distant part of the world. Molecular analysis revealed dengue epidemics to be comprised of different genotypes of serotype 1 and 2 raising concerns on potential role of different genotypes causing Dengue hemorrhagic fever. Also, our result indicated spread of DENV-2 in non-endemic area such as hilly region of Nepal which was considered to be free of dengue due to high altitude and cold weather.
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Affiliation(s)
- Sabita Prajapati
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Rajindra Napit
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- Department of Molecular Biology and Virology, Centre for Molecular Dynamics Nepal, Thapathali, Kathmandu, Nepal
| | - Anup Bastola
- Department of Tropical and Infectious Disease, Sukraraj Tropical and Infectious Disease Hospital, Teku, Kathmandu, Nepal
| | - Ramanuj Rauniyar
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Srijan Shrestha
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Mahesh Lamsal
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
| | - Anurag Adhikari
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- Department of Infection and Immunology, Kathmandu Research Institute for Biological Sciences, Lalitpur, Nepal
| | - Parmananda Bhandari
- Department of Tropical and Infectious Disease, Sukraraj Tropical and Infectious Disease Hospital, Teku, Kathmandu, Nepal
| | - Sanjay Ray Yadav
- Department of Haematology and Biochemistry, Chitwan Medical College and Teaching Hospital, Chitwan, Bharatpur, Nepal
| | - Krishna Das Manandhar
- Central Department of Biotechnology, Tribhuvan University, Kirtipur, Kathmandu, Nepal
- * E-mail:
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103
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Ko HY, Salem GM, Chang GJJ, Chao DY. Application of Next-Generation Sequencing to Reveal How Evolutionary Dynamics of Viral Population Shape Dengue Epidemiology. Front Microbiol 2020; 11:1371. [PMID: 32636827 PMCID: PMC7318875 DOI: 10.3389/fmicb.2020.01371] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/27/2020] [Indexed: 12/13/2022] Open
Abstract
Dengue viral (DENV) infection results in a wide spectrum of clinical manifestations from asymptomatic, mild fever to severe hemorrhage diseases upon infection. Severe dengue is the leading cause of pediatric deaths and/or hospitalizations, which are a major public health burden in dengue-endemic or hyperendemic countries. Like other RNA viruses, DENV continues to evolve. Adaptive mutations are obscured by the major consensus sequence (so-called wild-type sequences) and can only be identified once they become the dominant viruses in the virus population, a process that can take months or years. Traditional surveillance systems still rely on Sanger consensus sequencing. However, with the recent advancement of high-throughput next-generation sequencing (NGS) technologies, the genome-wide investigation of virus population within-host and between-hosts becomes achievable. Thus, viral population sequencing by NGS can increase our understanding of the changing epidemiology and evolution of viral genomics at the molecular level. This review focuses on the studies within the recent decade utilizing NGS in different experimental and epidemiological settings to understand how the adaptive evolution of dengue variants shapes the dengue epidemic and disease severity through its transmission. We propose three types of studies that can be pursued in the future to enhance our surveillance for epidemic prediction and better medical management.
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Affiliation(s)
- Hui-Ying Ko
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung, Taiwan
| | - Gielenny M Salem
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung, Taiwan
| | - Gwong-Jen J Chang
- Arboviral Diseases Branch, Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO, United States
| | - Day-Yu Chao
- Graduate Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung-Hsing University, Taichung, Taiwan
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104
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Langat SK, Eyase FL, Berry IM, Nyunja A, Bulimo W, Owaka S, Ofula V, Limbaso S, Lutomiah J, Jarman R, Distelhorst J, Sang RC. Origin and evolution of dengue virus type 2 causing outbreaks in Kenya: Evidence of circulation of two cosmopolitan genotype lineages. Virus Evol 2020; 6:veaa026. [PMID: 32523778 PMCID: PMC7266482 DOI: 10.1093/ve/veaa026] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Dengue fever (DF) is an arboviral disease caused by dengue virus serotypes 1-4 (DENV 1-4). Globally, DF incidence and disease burden have increased in the recent past. Initially implicated in a 1982 outbreak, DENV-2 recently reemerged in Kenya causing outbreaks between 2011 and 2014 and more recently 2017–8. The origin and the evolutionary patterns that may explain the epidemiological expansion and increasing impact of DENV-2 in Kenya remain poorly understood. Using whole-genome sequencing, samples collected during the 2011–4 and 2017–8 dengue outbreaks were analyzed. Additional DENV-2 genomes were downloaded and pooled together with the fourteen genomes generated in this study. Bioinformatic methods were used to analyze phylogenetic relationships and evolutionary patterns of DENV-2 causing outbreaks in Kenya. The findings from this study have shown the first evidence of circulation of two different Cosmopolitan genotype lineages of DENV-2; Cosmopolitan-I (C-I) and Cosmopolitan-II (C-II), in Kenya. Our results put the origin location of C-I lineage in India in 2011, and C-II lineage in Burkina Faso between 1979 and 2013. C-I lineage was the most isolated during recent outbreaks, thus showing the contribution of this newly emerged strain to the increased DENV epidemics in the region. Our findings, backed by evidence of recent local epidemics that have been associated with C-I in Kenya and C-II in Burkina Faso, add to the growing evidence of expanding circulation and the impact of multiple strains of DENV in the region as well as globally. Thus, continued surveillance efforts on DENV activity and its evolutionary trends in the region, would contribute toward effective control and the current vaccine development efforts.
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Affiliation(s)
- Solomon K Langat
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Fredrick Lunyagi Eyase
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Institute for Biotechnology Research, Jomo Kenyatta University of Agriculture and Technology
| | | | - Albert Nyunja
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Wallace Bulimo
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Department of Biochemistry, University of Nairobi
| | - Samuel Owaka
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Victor Ofula
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Samson Limbaso
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
| | - Joel Lutomiah
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
| | - Richard Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research
| | - John Distelhorst
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya
| | - Rosemary C Sang
- Department of Emerging Infectious Diseases, United States Army Medical Research Directorate-Africa, Nairobi, Kenya.,Center for Virus Research, Kenya Medical Research Institute
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105
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O’Connor O, Calvez E, Inizan C, Pocquet N, Richard V, Dupont-Rouzeyrol M. Vector competence of Aedes aegypti from New Caledonia for the four recent circulating dengue virus serotypes. PLoS Negl Trop Dis 2020; 14:e0008303. [PMID: 32407315 PMCID: PMC7252670 DOI: 10.1371/journal.pntd.0008303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 05/27/2020] [Accepted: 04/17/2020] [Indexed: 12/21/2022] Open
Abstract
In New Caledonia (NC), Aedes aegypti is the only proven vector of dengue virus (DENV), which is the most prevalent arbovirosis in NC. Since World War II, the four DENV serotypes have circulated regularly in NC. The epidemiological profile, however, has evolved over the last ten years, with the persistence of DENV-1 circulation and the co-circulation of several DENV serotypes. The current study evaluated the ability of Ae. aegypti from NC to transmit four DENV serotypes (and two DENV-1 genotypes) isolated during recent outbreaks in NC. An Ae. aegypti F1 generation was twice independently orally challenged with each DENV strain (107 FFU/ml). Infection, dissemination and transmission rates and transmission efficiency were measured at day 7 and 14 post-exposure, as well as the quantity of infectious virus particles. Mosquito infection was observed as early as 7 days post-infection. Infection rates between 18 and 58% were measured for all DENV serotypes/genotypes tested. Although dissemination rates ranged from 78 to 100%, transmission efficiencies were low, with values not exceeding 21% at 14 days post-infection for all DENV strains. This study shows that NC Ae. aegypti are moderately competent for DENV in laboratory conditions. In link with epidemiological data, these results suggest implication of other factors in the sustained circulation of DENV-1 in New Caledonia. Aedes aegypti is the only known vector for dengue virus (DENV) in New Caledonia (NC). DENV are divided into four serotypes (DENV-1 to -4), based on their antigenic properties, these being subdivided into different genotypes. All four DENV serotypes have regularly circulated in New Caledonia in the past. An unusual persistence of DENV-1 has been observed during the last ten years, suggesting a possible preferential transmission of this DENV serotype by Ae. aegypti. In this study, we examine for the first time the ability of Ae. aegypti from New Caledonia to transmit the four circulating DENV serotypes, and more precisely two genotypes of DENV-1. Our results demonstrate that this vector is moderately competent for DENV, with slight differences observed between DENV serotype/genotype in terms of transmission. These findings suggest that other factors are at play in the sustained circulation of DENV-1 and that further vector-virus interactions studies should be undertaken to better understand the DENV epidemiological profile in NC.
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Affiliation(s)
- Olivia O’Connor
- Institut Pasteur de Nouvelle-Calédonie, URE Dengue et Arboviroses, Institut Pasteur International Network, Noumea, New Caledonia
- * E-mail:
| | - Elodie Calvez
- Institut Pasteur de Nouvelle-Calédonie, URE Dengue et Arboviroses, Institut Pasteur International Network, Noumea, New Caledonia
| | - Catherine Inizan
- Institut Pasteur de Nouvelle-Calédonie, URE Dengue et Arboviroses, Institut Pasteur International Network, Noumea, New Caledonia
| | - Nicolas Pocquet
- Institut Pasteur de Nouvelle-Calédonie, URE Entomologie Médicale, Institut Pasteur International Network, Noumea, New Caledonia
| | - Vincent Richard
- Institut Pasteur de Nouvelle-Calédonie, Direction, Institut Pasteur International Network, Noumea, New Caledonia
| | - Myrielle Dupont-Rouzeyrol
- Institut Pasteur de Nouvelle-Calédonie, URE Dengue et Arboviroses, Institut Pasteur International Network, Noumea, New Caledonia
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106
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Falconi-Agapito F, Selhorst P, Merino X, Torres F, Michiels J, Fernandez C, Talledo M, Ariën KK. A new genetic variant of dengue serotype 2 virus circulating in the Peruvian Amazon. Int J Infect Dis 2020; 96:136-138. [PMID: 32387448 DOI: 10.1016/j.ijid.2020.04.087] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 11/19/2022] Open
Abstract
We sequenced the envelope gene of dengue virus serotype 2 (DENV-2-E) in samples from an outbreak reported in 2018, in Yurimaguas, Peru. The strain belongs to lineage 2 of the American/Asian genotype. We report a variant with two novel mutations (I379T and V484I) located in domain III of DENV2-E.
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Affiliation(s)
- Francesca Falconi-Agapito
- Department of Biomedical Sciences, Unit of Virology, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium; Unidad de Virología, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Av. Honorio Delgado 430, 15102, Lima, Peru.
| | - Philippe Selhorst
- Department of Biomedical Sciences, Unit of Virology, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium.
| | - Xiomara Merino
- Unidad de Virología, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Av. Honorio Delgado 430, 15102, Lima, Peru.
| | - Fiorella Torres
- Hospital Santa Gema, Yurimaguas, Calle Progreso 405, Yurimaguas, Alto Amazonas, 16501, Loreto, Peru.
| | - Johan Michiels
- Department of Biomedical Sciences, Unit of Virology, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium.
| | - Connie Fernandez
- Hospital Santa Gema, Yurimaguas, Calle Progreso 405, Yurimaguas, Alto Amazonas, 16501, Loreto, Peru.
| | - Michael Talledo
- Unidad de Virología, Instituto de Medicina Tropical Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Av. Honorio Delgado 430, 15102, Lima, Peru.
| | - Kevin K Ariën
- Department of Biomedical Sciences, Unit of Virology, Institute of Tropical Medicine, Nationalestraat 155, B-2000, Antwerp, Belgium; Department of Biomedical Sciences, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
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107
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Molecular epidemiology of dengue fever outbreaks in Bhutan, 2016-2017. PLoS Negl Trop Dis 2020; 14:e0008165. [PMID: 32320397 PMCID: PMC7176082 DOI: 10.1371/journal.pntd.0008165] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 02/23/2020] [Indexed: 12/30/2022] Open
Abstract
Dengue continues to pose a significant public health problem in tropical and subtropical countries. In Bhutan, first outbreak of dengue fever (DF) was reported in 2004 in a southern border town, followed by sporadic cases over the years. In this study, we analysed DF outbreaks that occurred in 3 different places during the years 2016 and 2017. A total of 533 cases in 2016 and 163 in 2017 were suspected of having of DF, where young adults were mostly affected. A total of 240 acute serum specimens collected and analyzed for serotype by nested RT-PCR revealed predominance of serotypes 1 and 2 (DENV-1 and 2). Phylogenetic analysis using envelope gene for both the serotypes demonstrated cosmopolitan genotype which were closely related to strains from India, indicating that they were probably imported from the neighboring country over the past few years. Endemicity of DENV in some places of southern Bhutan has been established previously. In this study, we analysed outbreaks of DF that occurred in 3 places over a period of 2 years, 1 of which was previously not known to be endemic to DENV. Serum specimens collected from patients suspected of having DF were analyzed in the Royal Centre for Disease Control (RCDC) in Bhutan and in Armed Forces Research Institute of Medical Sciences (AFRIMS), Thailand. DENV-1 and 2 were established as the causes of the outbreaks, also indicating that serotypes of DENV circulating in the country over the past years have remained the same. Our analyses reveal that the current DENV-1and DENV-2 in Bhutan probably originated from India, Bhutan’s closest neighboring country.
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108
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Damodaran L, de Bernardi Schneider A, Chen S, Janies D. Evolution of endemic and sylvatic lineages of dengue virus. Cladistics 2020; 36:115-128. [PMID: 34618965 DOI: 10.1111/cla.12402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2019] [Indexed: 11/30/2022] Open
Abstract
Recent disease outbreaks have raised awareness of tropical pathogens, especially mosquito-borne viruses. Dengue virus (DENV) is a widely studied mammalian pathogen transmitted by various species of mosquito in the genus Aedes, especially Aedes aegypti and Aedes albopictus. The prevailing view of the research community is that endemic viral lineages that cause epidemics of DENV in humans have emerged over time from sylvatic viral lineages, which persist in wild, non-human primates. These notions have been examined by researchers through phylogenetic analyses of the envelope gene (E) from the four serotypes of DENV (serotypes DENV-1 to DENV-4). In these previous reports, researchers used visual inspection of a phylogeny in order to assert that sylvatic lineages lead to endemic clades. In making this assertion, these researchers also reasserted the model of periodic sylvatic to endemic disease outbreaks. Since that study, there has been a significant increase in data both in terms of metadata (e.g., place and host of isolation) and genetic sequences of DENV. Here, we re-examine the model of sylvatic to endemic shifts in viral lineages through a phylogenetic tree search and character evolution study of metadata on the tree. We built a dataset of nucleotide sequences for 188 isolates of DENV that have metadata on sylvatic or endemic sampling along with three orthologous sequences from West Nile virus as the outgroup for the phylogenetic analysis. In contrast to previous research, we find that there are several shifts from endemic to sylvatic lineages as well as sylvatic to endemic lineages, indicating a much more dynamic model of evolution. We propose that a model that allows oscillation between sylvatic and endemic hosts better captures the dynamics of DENV transmission.
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Affiliation(s)
- Lambodhar Damodaran
- Department of Bioinformatics and Genomics, College of Computing and Informatics, University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, 28223-0001, NC, USA.,Institute of Bioinformatics, University of Georgia, 120 Green St., Athens, 30602, GA, USA
| | - Adriano de Bernardi Schneider
- AntiViral Research Center, Department of Medicine, University of California San Diego, 220 Dickinson St, Suite A, San Diego, 92103-8208, CA, USA
| | - Shi Chen
- Department of Public Health Sciences, College of Health and Human Services, University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, 28223-0001, NC, USA
| | - Daniel Janies
- Department of Bioinformatics and Genomics, College of Computing and Informatics, University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, 28223-0001, NC, USA
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109
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Hosseini S, Muñoz-Soto RB, Oliva-Ramírez J, Vázquez-Villegas P, Aghamohammadi N, Rodriguez-Garcia A, Martinez-Chapa SO. Latest Updates in Dengue Fever Therapeutics: Natural, Marine and Synthetic Drugs. Curr Med Chem 2020; 27:719-744. [DOI: 10.2174/0929867325666180629124709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/25/2018] [Accepted: 06/01/2018] [Indexed: 11/22/2022]
Abstract
In this paper, we review the history of Dengue, the mechanism of infection, the
molecular characteristics and components of Dengue, the mechanism of entry to the target
cells, cyclization of the genome and replication process, as well as translation of the proteins
for virus assembly. The major emphasis of this work is on natural products and plant extracts,
which were used for as palliative or adjuvant treatment of Dengue. This review article also
summarizes the latest findings in regards to the marine products as effective drugs to target
different symptoms of Dengue. Furthermore, an update on synthetic drugs for treating Dengue
is provided in this review. As a novel alternative, we describe monoclonal antibody therapy
for Dengue management and treatment.
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Affiliation(s)
- Samira Hosseini
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, N.L. 64849, Mexico
| | - Rodrigo B. Muñoz-Soto
- Tecnologico de Monterrey, Campus Ciudad de México, Escuela de Ingeniería y Ciencias, Calle del Puente 222, Mexico City, Mexico
| | - Jacqueline Oliva-Ramírez
- Tecnologico de Monterrey, Escuela de Ingenieria y Ciencias, Ave. Lago de Guadalupe Km 3.5, Cd Lopez Mateos, Atizapan, Estado de Mexico, Mexico
| | | | - Nasrin Aghamohammadi
- Centre for Occupational and Environmental Health, Department of Social and Preventive Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Aida Rodriguez-Garcia
- Universidad Autonoma de Nuevo Leon, Facultad de Ciencias Biologicas, Instituto de Biotecnología. Ave. Pedro de Alba S/N, Ciudad Universitaria, San Nicolás de los Garza, N.L. 66455, Mexico
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110
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Musa AA, Muturi MW, Musyoki AM, Ouso DO, Oundo JW, Makhulu EE, Wambua L, Villinger J, Jeneby MM. Arboviruses and Blood Meal Sources in Zoophilic Mosquitoes at Human-Wildlife Interfaces in Kenya. Vector Borne Zoonotic Dis 2020; 20:444-453. [PMID: 32155389 DOI: 10.1089/vbz.2019.2563] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Background: Zoophilic mosquitoes play an important role in the transmission of arboviruses of medical importance at human-wildlife interfaces, yet arbovirus surveillance efforts have been focused mostly on anthropophilic mosquitoes. Understanding the diversity of zoophilic mosquitoes and their associated feeding patterns and arboviruses can inform better vector control strategies. Materials and Methods: We morphologically identified mosquitoes collected from two game reserves in Kenya, the Maasai Mara National Reserve (MMNR) and locations near the Shimba Hills National Reserve (SHNR). Representative mosquitoes were also identified by cytochrome c oxidase subunit 1 (COI) barcode sequencing. In addition, we identified the vertebrate hosts of mosquito blood meals from the contents of each mosquito's abdomen by high-resolution melting (HRM) analysis and sequencing of COI, 16S ribosomal RNA, and cytochrome b gene PCR products. Similarly, mosquito arbovirus infections were identified by HRM analysis and sequencing of Alphavirus- and Flavivirus-specific RT-PCR products. Results: Of 2858 mosquitoes collected, 51 were engorged with blood meals from seven different vertebrate hosts, including humans, birds, domestic, and peridomestic animals and wildlife. Culex was the most abundant mosquito genus, with Culex pipiens being the most abundant species in both study regions. Among MMNR samples, we detected dengue serotype-2 virus (DENV-2) for the first time in Aedes tarsalis and Aedes tricholabis, as well as Sindbis virus in male Cx. pipiens. We also detected DENV-2 in Aedes aegypti sampled from locations near the SHNR. Human and diverse wildlife blood meals were identified, including bushbuck blood in the dengue-infected Ae. tarsalis and both human and hippopotamus blood in a single Eretmapodites chrysogaster mosquito. Conclusions: Our findings highlight the potential risk of sylvatic dengue and Sindbis transmission to humans by zoophilic mosquitoes at human-wildlife interfaces in Africa. Of specific importance, we provide evidence of sylvatic DENV-2 in Ae. tarsalis and Ae. tricholabis, representing potential new dengue vectors.
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Affiliation(s)
- Ali A Musa
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya.,Department of Medical Laboratory Sciences, Kenyatta University, Nairobi, Kenya
| | - Margaret W Muturi
- Department of Medical Laboratory Sciences, Kenyatta University, Nairobi, Kenya
| | - Abednego M Musyoki
- Department of Medical Laboratory Sciences, Kenyatta University, Nairobi, Kenya
| | - Daniel O Ouso
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Joseph W Oundo
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Edward E Makhulu
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Lillian Wambua
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya.,International Livestock Research Institute (ILRI), Nairobi, Kenya
| | - Jandouwe Villinger
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya
| | - Maamun M Jeneby
- International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya.,Department of Tropical and Infectious Diseases, Institute of Primate Research, National Museums of Kenya, Nairobi, Kenya
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111
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Sathyapalan DT, Padmanabhan A, Moni M, P-Prabhu B, Prasanna P, Balachandran S, Trikkur SP, Jose S, Edathadathil F, Anilkumar JO, Jayaprasad R, Koramparambil G, Kamath RC, Menon V, Menon V. Efficacy & safety of Carica papaya leaf extract (CPLE) in severe thrombocytopenia (≤30,000/μl) in adult dengue - Results of a pilot study. PLoS One 2020; 15:e0228699. [PMID: 32074143 PMCID: PMC7029881 DOI: 10.1371/journal.pone.0228699] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 01/21/2020] [Indexed: 11/22/2022] Open
Abstract
Severe thrombocytopenia in dengue often prompts platelet transfusion primarily to reduce bleeding risk. In India, about 11–43% of dengue patients report receiving platelet transfusions which is considered scarce and expensive especially in resource limited settings. Herein, we evaluated the efficacy and safety of Carica papaya leaf extract (CPLE) in the management of severe thrombocytopenia (≤30,000/μL) in dengue infection. 51 laboratory confirmed adult dengue patients with platelet counts ≤30,000/μL were randomly assigned to either treatment (n = 26) or placebo (n = 24) group. By day 3, CPLE treated patients reported significantly (p = 0.007) increased platelet counts (482%± 284) compared to placebo (331%±370) group. In the treatment group, fewer patients received platelet transfusions (1/26 v/s 2/24) and their median time for platelets to recover to ≥ 50,000/μL was 2 days (IQR 2–3) compared to 3 days (IQR 2–4) in placebo. Overall, CPLE was safe and well tolerated with no significant decrease in mean hospitalization days. Plasma cytokine profiling revealed that by day 3, mean percent increase in TNFα and IFNγ levels in treatment group was less compared to that observed in placebos; (TNFα: 58.6% v/s 127.5%; p = 0.25 and IFNγ: 1.93% v/s 62.6% for; p = 0.12). While a mean percent increase in IL-6 levels occurred in placebos (15.92%±29.93%) by day 3, a decrease was noted in CPLE group (12.95%±21.75%; p = 0.0232). Inversely, CPLE treated patients reported a mean percent increase compared to placebo by day 3 (143% ±115.7% v/s 12.03%± 48.4%; p = 0.006). Further, by day 3, a faster clearance kinetics of viral NS1 antigenemia occurred–mean NS1 titers in treatment group decreased to 97.3% compared to 88% in placebos (p = 0.023). This study demonstrates safety and efficacy of CPLE in increasing platelet counts in severe thrombocytopenia in dengue infections. A possible immunomodulatory and antiviral activity may be attributed to CPLE treatment. These findings merit validation in larger prospective studies. Trial registration Name of the registry: Clinical Trials Registry—India (CTRI) Registration No.: CTRI-REF/2017/02/013314
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Affiliation(s)
- Dipu T. Sathyapalan
- Department of General Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Athira Padmanabhan
- Clinical Virology Laboratory, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Merlin Moni
- Department of General Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Binny P-Prabhu
- Department of General Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Preetha Prasanna
- Department of Medical Administration, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Sabarish Balachandran
- Department of Emergency Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Sreekrishnan P. Trikkur
- Department of Emergency Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Soumya Jose
- Clinical Virology Laboratory, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Fabia Edathadathil
- Department of Allied Health Sciences, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Jagan O. Anilkumar
- Clinical Virology Laboratory, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Rekha Jayaprasad
- Department of Medical Administration, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | | | - Ravindra C. Kamath
- Department of Integrated & Holistic Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Veena Menon
- Clinical Virology Laboratory, Amrita Institute of Medical Sciences, Kochi, Kerala, India
| | - Vidya Menon
- Department of General Medicine, Amrita Institute of Medical Sciences, Kochi, Kerala, India
- * E-mail:
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112
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Delineating blueprint of an epitope-based peptide vaccine against the multiple serovars of dengue virus: A hierarchical reverse vaccinology approach. INFORMATICS IN MEDICINE UNLOCKED 2020. [DOI: 10.1016/j.imu.2020.100430] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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113
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Chong LC, Khan AM. Identification of highly conserved, serotype-specific dengue virus sequences: implications for vaccine design. BMC Genomics 2019; 20:921. [PMID: 31874646 PMCID: PMC6929274 DOI: 10.1186/s12864-019-6311-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Accepted: 11/19/2019] [Indexed: 11/24/2022] Open
Abstract
Background The sequence diversity of dengue virus (DENV) is one of the challenges in developing an effective vaccine against the virus. Highly conserved, serotype-specific (HCSS), immune-relevant DENV sequences are attractive candidates for vaccine design, and represent an alternative to the approach of selecting pan-DENV conserved sequences. The former aims to limit the number of possible cross-reactive epitope variants in the population, while the latter aims to limit the cross-reactivity between the serotypes to favour a serotype-specific response. Herein, we performed a large-scale systematic study to map and characterise HCSS sequences in the DENV proteome. Methods All reported DENV protein sequence data for each serotype was retrieved from the NCBI Entrez Protein (nr) Database (txid: 12637). The downloaded sequences were then separated according to the individual serotype proteins by use of BLASTp search, and subsequently removed for duplicates and co-aligned across the serotypes. Shannon’s entropy and mutual information (MI) analyses, by use of AVANA, were performed to measure the diversity within and between the serotype proteins to identify HCSS nonamers. The sequences were evaluated for the presence of promiscuous T-cell epitopes by use of NetCTLpan 1.1 and NetMHCIIpan 3.2 server for human leukocyte antigen (HLA) class I and class II supertypes, respectively. The predicted epitopes were matched to reported epitopes in the Immune Epitope Database. Results A total of 2321 nonamers met the HCSS selection criteria of entropy < 0.25 and MI > 0.8. Concatenating these resulted in a total of 337 HCSS sequences. DENV4 had the most number of HCSS nonamers; NS5, NS3 and E proteins had among the highest, with none in the C and only one in prM. The HCSS sequences were immune-relevant; 87 HCSS sequences were both reported T-cell epitopes/ligands in human and predicted epitopes, supporting the accuracy of the predictions. A number of the HCSS clustered as immunological hotspots and exhibited putative promiscuity beyond a single HLA supertype. The HCSS sequences represented, on average, ~ 40% of the proteome length for each serotype; more than double of pan-DENV sequences (conserved across the four serotypes), and thus offer a larger choice of sequences for vaccine target selection. HCSS sequences of a given serotype showed significant amino acid difference to all the variants of the other serotypes, supporting the notion of serotype-specificity. Conclusion This work provides a catalogue of HCSS sequences in the DENV proteome, as candidates for vaccine target selection. The methodology described herein provides a framework for similar application to other pathogens.
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Affiliation(s)
- Li Chuin Chong
- Centre for Bioinformatics, School of Data Sciences, Perdana University, Jalan MAEPS Perdana, 43400, Serdang, Selangor Darul Ehsan, Malaysia
| | - Asif M Khan
- Centre for Bioinformatics, School of Data Sciences, Perdana University, Jalan MAEPS Perdana, 43400, Serdang, Selangor Darul Ehsan, Malaysia.
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114
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Gaunt MW, Gubler DJ, Pettersson JHO, Kuno G, Wilder-Smith A, de Lamballerie X, Gould EA, Falconar AK. Recombination of B- and T-cell epitope-rich loci from Aedes- and Culex-borne flaviviruses shapes Zika virus epidemiology. Antiviral Res 2019; 174:104676. [PMID: 31837392 DOI: 10.1016/j.antiviral.2019.104676] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 12/06/2019] [Accepted: 12/08/2019] [Indexed: 02/07/2023]
Abstract
Sporadic human Zika virus (ZIKV) infections have been recorded in Africa and Asia since the 1950s. Major epidemics occurred only after ZIKV emerged in the Pacific islands and spread to the Americas. Specific biological determinants of the explosive epidemic nature of ZIKV have not been identified. Phylogenetic studies revealed incongruence in ZIKV placement in relation to Aedes-borne dengue viruses (DENV) and Culex-borne flaviviruses. We hypothesized that this incongruence reflects interspecies recombination resulting in ZIKV evasion of cross-protective T-cell immunity. We investigated ZIKV phylogenetic incongruence in relation to: DENV T-cell epitope maps experimentally identified ex vivo, published B-cell epitope loci, and CD8+ T-cell epitopes predicted in silico for mosquito-borne flaviviruses. Our findings demonstrate that the ZIKV proteome is a hybrid of Aedes-borne DENV proteins interspersed amongst Culex-borne flavivirus proteins derived through independent interspecies recombination events. These analyses infer that DENV-associated proteins in the ZIKV hybrid proteome generated immunodominant human B-cell responses, whereas ZIKV recombinant derived Culex-borne flavivirus-associated proteins generated immunodominant CD8+ and/or CD4+ T-cell responses. In silico CD8+ T-cell epitope ZIKV cross-reactive prediction analyses verified this observation. We propose that by acquiring cytotoxic T-cell epitope-rich regions from Culex-borne flaviviruses, ZIKV evaded DENV-generated T-cell immune cross-protection. Thus, Culex-borne flaviviruses, including West Nile virus and Japanese encephalitis virus, might induce cross-protective T-cell responses against ZIKV. This would explain why explosive ZIKV epidemics occurred in DENV-endemic regions of Micronesia, Polynesia and the Americas where Culex-borne flavivirus outbreaks are infrequent and why ZIKV did not cause major epidemics in Asia where Culex-borne flaviviruses are widespread.
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Affiliation(s)
- Michael W Gaunt
- London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.
| | - Duane J Gubler
- Program in Emerging Infectious Diseases, Duke-NUS Medical School, 8 College Rd, 169857, Singapore
| | - John H-O Pettersson
- Department of Medical Biochemistry and Microbiology, Zoonosis Science Center, Uppsala University, Uppsala, Sweden; Marie Bashir Institute for Infectious Diseases and Biosecurity, Charles Perkins Centre, School of Life and Environmental Sciences and Sydney Medical School, University of Sydney, Sydney, New South Wales, 2006, Australia
| | - Goro Kuno
- 1648 Collindale Dr, Fort Collins, CO, 80525, USA
| | - Annelies Wilder-Smith
- London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK; Department of Public Health and Clinical Medicine, Epidemiology and Public Health, Umeå University, Umeå, Sweden; Heidelberg Institute of Global Health, University of Heidelberg, Germany
| | - Xavier de Lamballerie
- UMR "Unité des Virus Emergents", Aix-Marseille Université-IRD 190, Inserm, 1207-IHU Méditerranée Infection, Marseille, France
| | - Ernest A Gould
- UMR "Unité des Virus Emergents", Aix-Marseille Université-IRD 190, Inserm, 1207-IHU Méditerranée Infection, Marseille, France
| | - Andrew K Falconar
- Departmento de Medicina, Universidad del Norte, Barranquilla, Colombia
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115
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Cassaniti I, Percivalle E, Adzasehoun KMG, Comolli G, Baldanti F. Dengue Virus-Specific Humoral and T Cellular Immune Response in Italian Residents and Travelers Returning from Endemic Areas. Vector Borne Zoonotic Dis 2019; 20:295-302. [PMID: 31821105 DOI: 10.1089/vbz.2019.2515] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dengue virus (DENV), a member of the family Flaviviridae, is the causative agent of dengue fever, the most prevalent mosquito-borne viral illness in humans, representing a major public health concern in the tropical countries. Although humoral immunity to DENV has been extensively studied and widely used, little is known about the potential diagnostic use of T cell response for DENV diagnosis. The aim of our study was to characterize the T cell immunity in subjects with acute or past DENV infection, using an original and easy to perform ex vivo ELISpot assay, and to evaluate the role of cross-reactivity between the four DENV serotypes and between DENV and Zika virus (ZIKV). As controls, DENV-seronegative healthy subjects were enrolled and a cutoff of positive DENV-specific T cell response was calculated. DENV-specific T cell response for at least one DENV serotype was detected among all DENV-specific neutralization positive subject. Furthermore, our data showed that in acute DENV infection, the DENV-specific effector memory T cell response against the relevant serotype was predominant. However, a high level of cross-reactivity among all DENV serotypes was also documented. DENV-specific T cell response was almost undetectable among DENV-seronegative subjects with ZIKV acute infection, supporting the hypothesis that the assay could be useful in differential diagnosis between ZIKV and DENV infection.
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Affiliation(s)
- Irene Cassaniti
- Molecular Virology Unit, Microbiology and Virology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Elena Percivalle
- Molecular Virology Unit, Microbiology and Virology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Kodjo Messan Guy Adzasehoun
- Molecular Virology Unit, Microbiology and Virology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Giuditta Comolli
- Molecular Virology Unit, Microbiology and Virology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.,Experimental Research Laboratories, Biotechnology Area, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Fausto Baldanti
- Molecular Virology Unit, Microbiology and Virology Department, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy.,Department of Clinical, Surgical, Diagnostic and Pediatric Sciences, University of Pavia, Pavia, Italy
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116
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Gallichotte EN, Baric TJ, Nivarthi U, Delacruz MJ, Graham R, Widman DG, Yount BL, Durbin AP, Whitehead SS, de Silva AM, Baric RS. Genetic Variation between Dengue Virus Type 4 Strains Impacts Human Antibody Binding and Neutralization. Cell Rep 2019; 25:1214-1224. [PMID: 30380413 PMCID: PMC6226424 DOI: 10.1016/j.celrep.2018.10.006] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/15/2018] [Accepted: 09/28/2018] [Indexed: 11/29/2022] Open
Abstract
There are four distinct DENV serotypes, and within DENV4, there are five distinct genotypes. The impact of genotypic diversity is not known, nor is it clear whether infection with one DENV4 genotype results in protective immunity against the other genotypes. To measure the impact of DENV4 genetic diversity, we generated an isogenic panel of viruses containing the envelope protein from the different genotypes. We characterized many properties of these viruses and find that a small number of amino acids changes within the envelope have disproportionate impacts on virus biology. Additionally, we observe large differences in the ability of DENV4 antibodies, immune sera, and vaccine sera to neutralize the panel, suggesting that DENV4 immunity might not be equally protective against all DENV4s. Our results support the monitoring of changing or emerging DENV genotypes and their role in escaping pre-existing neutralizing antibodies in people who have been vaccinated or exposed to natural DENV4 infections. There is amino acid variability within the envelope protein across DENV4 genotypes DENV4 viruses differ in maturation, glycosylation, and ability to infect cells Monoclonal antibodies differentially bind and neutralize DENV4 genotype viruses Infection and vaccination elicit antibodies, which neutralize DENV4s differently
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Affiliation(s)
- Emily N Gallichotte
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA.
| | - Thomas J Baric
- Department of Epidemiology, University of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC, USA
| | - Usha Nivarthi
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - Matthew J Delacruz
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - Rachel Graham
- Department of Epidemiology, University of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC, USA
| | - Douglas G Widman
- Department of Epidemiology, University of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC, USA
| | - Boyd L Yount
- Department of Epidemiology, University of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC, USA
| | - Anna P Durbin
- Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Stephen S Whitehead
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Aravinda M de Silva
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA
| | - Ralph S Baric
- Department of Microbiology and Immunology, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC, USA; Department of Epidemiology, University of North Carolina at Chapel Hill School of Public Health, Chapel Hill, NC, USA.
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117
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Blight J, Alves E, Reyes-Sandoval A. Considering Genomic and Immunological Correlates of Protection for a Dengue Intervention. Vaccines (Basel) 2019; 7:E203. [PMID: 31816907 PMCID: PMC6963661 DOI: 10.3390/vaccines7040203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/25/2019] [Accepted: 11/27/2019] [Indexed: 01/18/2023] Open
Abstract
Over three billion are at risk of dengue infection with more than 100 million a year presenting with symptoms that can lead to deadly haemorrhagic disease. There are however no treatments available and the only licensed vaccine shows limited efficacy and is able to enhance the disease in some cases. These failures have mainly been due to the complex pathology and lack of understanding of the correlates of protection for dengue virus (DENV) infection. With increasing data suggesting both a protective and detrimental effect for antibodies and CD8 T-cells whilst having complex environmental dynamics. This review discusses the roles of genomic and immunological aspects of DENV infection, providing both a historical interpretation and fresh discussion on how this information can be used for the next generation of dengue interventions.
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Affiliation(s)
- Joshua Blight
- Department of Life Sciences, Imperial College London, Sir Alexander Fleming Building, Exhibition Road, South Kensington, London SW7 2AZ, UK; (J.B.); (E.A.)
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, The Henry Wellcome Building for Molecular Physiology, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Eduardo Alves
- Department of Life Sciences, Imperial College London, Sir Alexander Fleming Building, Exhibition Road, South Kensington, London SW7 2AZ, UK; (J.B.); (E.A.)
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, The Henry Wellcome Building for Molecular Physiology, Roosevelt Drive, Oxford OX3 7BN, UK
| | - Arturo Reyes-Sandoval
- The Jenner Institute, Nuffield Department of Medicine, University of Oxford, The Henry Wellcome Building for Molecular Physiology, Roosevelt Drive, Oxford OX3 7BN, UK
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118
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Mishra B, Raghuraman R, Agarwal A, Aduri R. Finding small molecules with pan-serotype activity to target Dengue non-structural protein 1. Virusdisease 2019; 30:477-489. [PMID: 31890750 PMCID: PMC6917674 DOI: 10.1007/s13337-019-00561-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/26/2019] [Indexed: 11/27/2022] Open
Abstract
Dengue virus (DENV) is a mosquito-borne flavivirus which causes Dengue fever and severe Dengue. It exists as four antigenically different serotypes that are further classified into genotypes with varying degrees of pathogenicity. The non-structural protein 1 (NS1) of DENV has an important role in viral replication and its pathogenesis. NS1 is also considered as an important diagnostic marker for Dengue pathogenesis. To the best of our knowledge, there are no attempts to explore small molecule drugs to target the NS1 of all the serotypes. Here, we have taken the DENV 2 NS1 crystal structure as a reference to model the NS1 structure of the other three serotypes. Once the active site of the NS1 is identified, virtual screening of plant flavonoids is carried out against the NS1 of all the four serotypes. The top 200 molecules in the library with high binding affinities are further analysed to find the common ones having comparable affinities to all the four serotypes. The predicted common flavonoids are subjected to ADMET profiling to further select the most potential molecules that can be used to target NS1 of all the four serotypes.
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Affiliation(s)
- Bibhudutta Mishra
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, K K Birla Goa Campus, Zuarinagar, South Goa, Goa 403 726 India
| | - Raaghavi Raghuraman
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, K K Birla Goa Campus, Zuarinagar, South Goa, Goa 403 726 India
| | - Arjun Agarwal
- Department of Computer Science and Information Systems, Birla Institute of Technology and Science, Pilani, K K Birla Goa Campus, Zuarinagar, South Goa, Goa 403 726 India
| | - Raviprasad Aduri
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, K K Birla Goa Campus, Zuarinagar, South Goa, Goa 403 726 India
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119
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Castillo-Méndez M, Valverde-Garduño V. Aedes aegypti Immune Response and Its Potential Impact on Dengue Virus Transmission. Viral Immunol 2019; 33:38-47. [PMID: 31738698 DOI: 10.1089/vim.2019.0051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Dengue virus (DENV) transmission to human populations requires infection of vector mosquitoes as an essential component of the transmission process. DENV transmission leads to infections that range from asymptomatic to life-threatening pathologies, such as dengue hemorrhagic fever and dengue shock syndrome. Aedes aegypti is the principal vector of DENV, and its vector competence consists of the intrinsic factors, genes, molecules, and pathways that allow infection, replication, and dissemination of this virus throughout the cells of mosquito tissues. In the search for mosquito molecular targets to block DENV transmission, the effect of DENV infection on mosquitoes has been an important focus of research. In this study, we review the findings of research on the effect of DENV infection on mosquito tissue cells and the immunity pathways and molecules that are involved in this infection. We emphasize the relevance of recent findings to understand the relationship between Ae. aegypti immune response, vector competence, and DENV transmission to human hosts.
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Affiliation(s)
- Manuel Castillo-Méndez
- Departamento de Infección e Inmunidad, Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, México.,Escuela de Salud Pública de México, Instituto Nacional de Salud Pública, Cuernavaca, México
| | - Verónica Valverde-Garduño
- Departamento de Infección e Inmunidad, Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, México.,Escuela de Salud Pública de México, Instituto Nacional de Salud Pública, Cuernavaca, México
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120
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Johari NA, Voon K, Toh SY, Sulaiman LH, Yap IKS, Lim PKC. Sylvatic dengue virus type 4 in Aedes aegypti and Aedes albopictus mosquitoes in an urban setting in Peninsular Malaysia. PLoS Negl Trop Dis 2019; 13:e0007889. [PMID: 31730672 PMCID: PMC6881067 DOI: 10.1371/journal.pntd.0007889] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 11/27/2019] [Accepted: 10/28/2019] [Indexed: 12/03/2022] Open
Abstract
Dengue fever is endemic in Malaysia, contributing to significant economic and health burden in the country. Aedes aegypti and Ae. albopictus are the main vectors of the dengue virus (DENV), which circulates in sylvatic and human transmission cycles and has been present in Malaysia for decades. The study investigated the presence and distribution of DENV in urban localities in the Klang Valley, Peninsular Malaysia. A total of 364 Ae. aegypti and 1,025 Ae. albopictus larvae, and 10 Ae. aegypti and 42 Ae. albopictus adult mosquitoes were screened for the presence of DENV. In total, 31 (2.2%) samples were positive, of which 2 Ae. albopictus larvae were co-infected with two serotypes, one with DENV-2 and DENV-3 and the other with DENV-3 and DENV-4. Phylogenetic analysis determined that the isolates belonged to DENV-1 genotype I (1 Ae. aegypti adult), DENV-2 (1 Ae. albopictus larva), DENV-3 genotype V (3 Ae. aegypti larvae and 10 Ae. albopictus larvae) and DENV-4 genotype IV (6 Ae. aegypti larvae and 12 Ae. albopictus larvae), a sylvatic strain of DENV-4 which was most closely related with sylvatic strains isolated from arboreal mosquitoes and sentinel monkeys in Peninsular Malaysia in the 1970s. All four DENV serotypes were co-circulating throughout the study period. The detection of a sylvatic strain of DENV-4 in Ae. aegypti and Ae. albopictus mosquitoes in urban areas in Peninsular Malaysia highlights the susceptibility of these vectors to infection with sylvatic DENV. The infectivity and vector competence of these urban mosquitoes to this strain of the virus needs further investigation, as well as the possibility of the emergence of sylvatic virus into the human transmission cycle.
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Affiliation(s)
- Nur Alia Johari
- Institute for Research, Development and Innovation (IRDI), International Medical University, Kuala Lumpur, Malaysia
| | - Kenny Voon
- Pathology Division, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
| | - Shen Yung Toh
- Pathology Division, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
| | - Lokman Hakim Sulaiman
- Institute for Research, Development and Innovation (IRDI), International Medical University, Kuala Lumpur, Malaysia
- Department of Community Medicine, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
| | - Ivan Kok Seng Yap
- Sarawak Research and Development Council, Ministry of Education, Science and Technological Research, Sarawak, Malaysia
| | - Patricia Kim Chooi Lim
- Pathology Division, School of Medicine, International Medical University, Kuala Lumpur, Malaysia
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Carreño MF, Jiménez-Silva CL, Rey-Caro LA, Conde-Ocazionez SA, Flechas-Alarcón MC, Velandia SA, Ocazionez RE. Dengue in Santander State, Colombia: fluctuations in the prevalence of virus serotypes are linked to dengue incidence and genetic diversity of the circulating viruses. Trop Med Int Health 2019; 24:1400-1410. [PMID: 31596525 DOI: 10.1111/tmi.13311] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To investigate the link between fluctuations in the prevalence of dengue virus (DENV) serotypes and the number of dengue cases in the metropolitan area of Bucaramanga, Santander State, Colombia, in the 2007-2010 and 2014-2017 periods. METHOD Viruses were isolated from febrile patient samples by direct application to C6/36-HT cells and typed using monoclonal antibodies. We performed autocorrelation and cross-correlation analyses to determine whether fluctuations in the prevalence of DENV serotypes and dengue cases were correlated. Full envelope (E) gene sequences were employed to examine the genetic diversity of serotypes circulating by using a phylogenetic approach. RESULTS All four dengue virus serotypes were detected. DENV-1 was the dominant serotype in both periods followed by DENV-3 or DENV-2 depending on the period; DENV-4 was the least prevalent virus in both periods. Cross-correlation analyses suggest a temporal relation between the fluctuations in the prevalence of DENV serotypes, which were almost simultaneous (lag = 0) or related to recent past fluctuations (lag > 1.0) in the number of dengue cases. Data suggest that a sustained predominance of DENV-1, an increase of the DENV-4 prevalence, and a switch from DENV-3 to DENV-2 could be linked to an outbreak. Circulating viruses were grouped into Genotype V, Asia/American III and II for DENV-1, -2, -3 and -4, respectively; intragenotypic diversity was detected. CONCLUSIONS The present work highlights the need of comprehensive studies on dynamics of DENV in Colombia to understand transmission of dengue and evaluate the effectiveness of a vaccination programme.
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Affiliation(s)
- María Fernanda Carreño
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Cinthy Lorena Jiménez-Silva
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Luz Aida Rey-Caro
- Centro de Investigaciones Epidemiológicas, Escuela de Medicina, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Sergio Andrés Conde-Ocazionez
- Laboratorio de Neurociencias, Facultad de Ciencias de la Salud, Escuela de Medicina, Universidad de Santander, Bucaramanga, Colombia
| | - María Camila Flechas-Alarcón
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Sindi Alejandra Velandia
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Raquel Elvira Ocazionez
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales, Universidad Industrial de Santander, Bucaramanga, Colombia
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Abstract
Arboviruses infecting people primarily exist in urban transmission cycles involving urban mosquitoes in densely populated tropical regions. For dengue, chikungunya, Zika and yellow fever viruses, sylvatic (forest) transmission cycles also exist in some regions and involve non-human primates and forest-dwelling mosquitoes. Here we review the investigation methods and available data on sylvatic cycles involving non-human primates and dengue, chikungunya, Zika and yellow fever viruses in Africa, dengue viruses in Asia and yellow fever virus in the Americas. We also present current putative data that Mayaro, o'nyong'nyong, Oropouche, Spondweni and Lumbo viruses exist in sylvatic cycles.
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123
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Hamel R, Surasombatpattana P, Wichit S, Dauvé A, Donato C, Pompon J, Vijaykrishna D, Liegeois F, Vargas RM, Luplertlop N, Missé D. Phylogenetic analysis revealed the co-circulation of four dengue virus serotypes in Southern Thailand. PLoS One 2019; 14:e0221179. [PMID: 31415663 PMCID: PMC6695175 DOI: 10.1371/journal.pone.0221179] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 07/31/2019] [Indexed: 12/15/2022] Open
Abstract
Dengue fever is caused by dengue viruses (DENV) from the Flavivirus genus and is the most prevalent arboviral disease. DENV exists in four immunogenically distinct and genetically-related serotypes (DENV-1 to 4), each subdivided in genotypes. Despite the endemicity of all four DENV serotypes in Thailand, no prior study has characterized the circulation of DENV in the southern provinces of the country. To determine the genetic diversity of DENV circulating in Southern Thailand in 2015 and 2016, we investigated 46 viruses from 182 patients' sera confirmed positive for DENV by serological and Nested RT-PCR tests. Our dataset included 2 DENV-1, 20 DENV-2, 9 DENV-3 and 15 DENV-4. Phylogenetic analysis was performed on viral envelop sequences. This revealed that part of the identified genotypes from DENV-1 and DENV-4 had been predominant in Asia (genotype I for both serotypes), while genotype II for DENV-4 and the Cosmopolitan genotype DENV-2 were also circulating. Whereas DENV-3 genotype II had been predominantly detected in South East Asia during the previous decades, we found genotype III and genotype I in Southern Thailand. All DENV genotype identified in this study were closely related to contemporary strains circulating in Southeast Asian countries, emphasizing the regional circulation of DENV. These results provide new insights into the co-circulation of all four DENV serotypes in Southern Thailand, confirming the hyperendemicity of DENV in the region. These findings also suggest a new trend of dissemination for some DENV serotypes with a possible shift in genotype distribution; as recently observed in other Asian countries.
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Affiliation(s)
- Rodolphe Hamel
- MIVEGEC UMR 224, Université de Montpellier, IRD, CNRS, Montpellier, France.,Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | | | - Alexandra Dauvé
- Department of Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Celeste Donato
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Australia
| | - Julien Pompon
- MIVEGEC UMR 224, Université de Montpellier, IRD, CNRS, Montpellier, France.,Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
| | - Dhanasekaran Vijaykrishna
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, Australia.,Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore, Singapore
| | - Florian Liegeois
- MIVEGEC UMR 224, Université de Montpellier, IRD, CNRS, Montpellier, France
| | - Ronald Morales Vargas
- Department of Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Natthanej Luplertlop
- Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Dorothée Missé
- MIVEGEC UMR 224, Université de Montpellier, IRD, CNRS, Montpellier, France
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124
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Touret F, Baronti C, Goethals O, Van Loock M, de Lamballerie X, Querat G. Phylogenetically based establishment of a dengue virus panel, representing all available genotypes, as a tool in dengue drug discovery. Antiviral Res 2019; 168:109-113. [DOI: 10.1016/j.antiviral.2019.05.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 11/29/2022]
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125
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Multiple introductions of dengue virus strains contribute to dengue outbreaks in East Kalimantan, Indonesia, in 2015-2016. Virol J 2019; 16:93. [PMID: 31345242 PMCID: PMC6659258 DOI: 10.1186/s12985-019-1202-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/18/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Dengue fever is a febrile disease caused by dengue virus (DENV), which affects people throughout the tropical and subtropical regions of the world, including Indonesia. East Kalimantan (Borneo) province suffered a dramatic increase in dengue cases in 2015 and 2016, making it the province with the second highest incidence of dengue in Indonesia. Despite this, dengue in East Kalimantan is understudied; leaving transmission dynamics of the disease in the area are mostly unknown. In this study, we investigate the factors contributing to the outbreaks in East Kalimantan. METHODS Prospective clinical and molecular virology study was conducted in two main cities in the province, namely Samarinda and Balikpapan, in 2015-2016. Patients' clinical, hematological, and demographic data were recorded. Dengue detection and confirmation was performed using NS1-antigen and IgG/IgM antibody detection. RT-PCR was conducted to determine the serotypes of the virus. Phylogenetic analysis was performed based on envelope gene sequences. RESULTS Three hundred patients with suspected dengue were recruited. Among these, 132 (44%) were diagnosed with dengue by NS1 antigen and/or nucleic acid detection. The majority of the infections (60%) were primary, with dengue hemorrhagic fever (DHF) the predominant manifestation (71.9%). Serotyping detected all four DENV serotypes in 112 (37.3%) cases, with the majority of patients (58.9%) infected by DENV-3. Phylogenetic analysis based on envelope gene sequences revealed the genotypes of the viruses as DENV-1 Genotype I, DENV-2 Cosmopolitan, and DENV-3 Genotype I. Most virus strains were closely-related to strains from cities in Indonesia. CONCLUSIONS Our observations indicate that multiple introductions of endemic DENV from surrounding cities in Indonesia, coupled with relatively low herd immunity, were likely responsible for the outbreak of the dominant viruses. The study provides information on the clinical spectrum of the disease, together with serology, viral genetics, and demographic data, which will be useful for better understanding of dengue disease in Borneo.
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126
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Thermodynamic study of the effect of ions on the interaction between dengue virus NS3 helicase and single stranded RNA. Sci Rep 2019; 9:10569. [PMID: 31332207 PMCID: PMC6646317 DOI: 10.1038/s41598-019-46741-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 06/25/2019] [Indexed: 01/13/2023] Open
Abstract
Dengue virus nonstructural protein 3 (NS3) fulfills multiple essential functions during the viral replication and constitutes a prominent drug target. NS3 is composed by a superfamily-2 RNA helicase domain joined to a serine protease domain. Quantitative fluorescence titrations employing a fluorescein-tagged RNA oligonucleotide were used to investigate the effect of salts on the interaction between NS3 and single stranded RNA (ssRNA). We found a strong dependence of the observed equilibrium binding constant, Kobs, with the salt concentration, decreasing at least 7-fold for a 1-fold increase on cation concentration. As a result of the effective neutralization of ~10 phosphate groups, binding of helicase domain of NS3 to ssRNA is accompanied by the release of 5 or 7 monovalent cations from an oligonucleotide or a polynucleotide, respectively and of 3 divalent cations from the same oligonucleotide. Such estimates are not affected by the type of cation, either monovalent (KCl, NaCl and RbCl) or divalent (MgCl2 and CaCl2), nor by the presence of the protease domain or the fluorescein label. Combined effect of mono and divalent cations was well described by a simple equilibrium binding model which allows to predict the values of Kobs at any concentration of cations.
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127
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El-Bitar AMH, Sarhan M, Abdel-Rahman MA, Quintero-Hernandez V, Aoki-Utsubo C, Moustafa MA, Possani LD, Hotta H. Smp76, a Scorpine-Like Peptide Isolated from the Venom of the Scorpion Scorpio maurus palmatus, with a Potent Antiviral Activity Against Hepatitis C Virus and Dengue Virus. Int J Pept Res Ther 2019; 26:811-821. [PMID: 32435168 PMCID: PMC7223391 DOI: 10.1007/s10989-019-09888-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2019] [Indexed: 12/17/2022]
Abstract
Growing global viral infections have been a serious public health problem in recent years. This current situation emphasizes the importance of developing more therapeutic antiviral compounds. Hepatitis C virus (HCV) and dengue virus (DENV) belong to the Flaviviridae family and are an increasing global health threat. Our previous study reported that the crude venom of Scorpio maurus palmatus possessed anti-HCV and anti-DENV activities in vitro. We report here the characterization of a natural antiviral peptide (scorpion-like peptide Smp76) that prevents HCV and DENV infection. Smp76 was purified from S. m. palmatus venom and contains 76 amino acids with six residues of cysteine. Smp76 antiviral activity was evaluated using a cell culture technique utilizing Huh7it-1, Vero/SLAM, HCV (JFH1, genotype 2a) and DENV (Trinidad 1751, type 2). A potential antiviral activity of Smp76 was detected in culture cells with an approximate IC50 of 0.01 μg/ml. Moreover, Smp76 prevents HCV infection and suppresses secondary infection, by inactivating extra-cellular infectious particles without affecting viral replication. Interestingly, Smp76 is neither toxic nor hemolytic in vitro at a concentration 1000-fold higher than that required for antiviral activity. Conclusively, this report highlights novel anti-HCV and anti-DENV activities of Smp76, which may lay the foundation for developing a new therapeutic intervention against these flaviviruses.
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Affiliation(s)
- Alaa M H El-Bitar
- 1Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt.,2Department of Microbiology, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017 Japan
| | - Moustafa Sarhan
- 1Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt.,2Department of Microbiology, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017 Japan
| | | | - Veronica Quintero-Hernandez
- 5Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, 62210 Cuernavaca, Morelos Mexico.,6CONACYT-Laboratorio de Ecología Molecular Microbiana, Centro de Investigaciones en Ciencias Microbiológicas-Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Ciudad Universitaria, C.P. 72570 Puebla, Mexico
| | - Chie Aoki-Utsubo
- 3Department of International Health, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142 Japan
| | - Mohsen A Moustafa
- 1Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt
| | - Lourival D Possani
- 5Departamento de Medicina Molecular y Bioprocesos, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Avenida Universidad, 2001, Colonia Chamilpa, Apartado Postal 510-3, 62210 Cuernavaca, Morelos Mexico
| | - Hak Hotta
- 2Department of Microbiology, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, 650-0017 Japan.,3Department of International Health, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Suma-ku, Kobe, 654-0142 Japan
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128
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van Eerde A, Gottschamel J, Bock R, Hansen KEA, Munang'andu HM, Daniell H, Liu Clarke J. Production of tetravalent dengue virus envelope protein domain III based antigens in lettuce chloroplasts and immunologic analysis for future oral vaccine development. PLANT BIOTECHNOLOGY JOURNAL 2019; 17:1408-1417. [PMID: 30578710 PMCID: PMC6576073 DOI: 10.1111/pbi.13065] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 12/07/2018] [Accepted: 12/12/2018] [Indexed: 05/19/2023]
Abstract
Dengue fever is a mosquito (Aedes aegypti) -transmitted viral disease that is endemic in more than 125 countries around the world. There are four serotypes of the dengue virus (DENV 1-4) and a safe and effective dengue vaccine must provide protection against all four serotypes. To date, the first vaccine, Dengvaxia (CYD-TDV), is available after many decades' efforts, but only has moderate efficacy. More effective and affordable vaccines are hence required. Plants offer promising vaccine production platforms and food crops offer additional advantages for the production of edible human and animal vaccines, thus eliminating the need for expensive fermentation, purification, cold storage and sterile delivery. Oral vaccines can elicit humoural and cellular immunity via both the mucosal and humoral immune systems. Here, we report the production of tetravalent EDIII antigen (EDIII-1-4) in stably transformed lettuce chloroplasts. Transplastomic EDIII-1-4-expressing lettuce lines were obtained and homoplasmy was verified by Southern blot analysis. Expression of EDIII-1-4 antigens was demonstrated by immunoblotting, with the EDIII-1-4 antigen accumulating to 3.45% of the total protein content. Immunological assays in rabbits showed immunogenicity of EDIII-1-4. Our in vitro gastrointestinal digestion analysis revealed that EDIII-1-4 antigens are well protected when passing through the oral and gastric digestion phases but underwent degradation during the intestinal phase. Our results demonstrate that lettuce chloroplast engineering is a promising approach for future production of an affordable oral dengue vaccine.
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Affiliation(s)
- André van Eerde
- NIBIO – Norwegian Institute of Bioeconomy ResearchDivision of Biotechnology and Plant HealthÅsNorway
| | - Johanna Gottschamel
- NIBIO – Norwegian Institute of Bioeconomy ResearchDivision of Biotechnology and Plant HealthÅsNorway
| | - Ralph Bock
- Max Planck Institute of Molecular Plant PhysiologyPotsdam‐GolmGermany
| | | | | | - Henry Daniell
- Department of BiochemistrySchool of Dental MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA
| | - Jihong Liu Clarke
- NIBIO – Norwegian Institute of Bioeconomy ResearchDivision of Biotechnology and Plant HealthÅsNorway
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129
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Cross-serotype interactions and disease outcome prediction of dengue infections in Vietnam. Sci Rep 2019; 9:9395. [PMID: 31253823 PMCID: PMC6598999 DOI: 10.1038/s41598-019-45816-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 06/04/2019] [Indexed: 11/30/2022] Open
Abstract
Dengue pathogenesis is extremely complex. Dengue infections are thought to induce life-long immunity from homologous challenges as well as a multi-factorial heterologous risk enhancement. Here, we use the data collected from a prospective cohort study of dengue infections in schoolchildren in Vietnam to disentangle how serotype interactions modulate clinical disease risk in the year following serum collection. We use multinomial logistic regression to correlate the yearly neutralizing antibody measurements obtained with each infecting serotype in all dengue clinical cases collected over the course of 6 years (2004–2009). This allowed us to extrapolate a fully discretised matrix of serotype interactions, revealing clear signals of increased risk of clinical illness in individuals primed with a previous dengue infection. The sequences of infections which produced a higher risk of dengue fever upon secondary infection are: DEN1 followed by DEN2; DEN1 followed by DEN4; DEN2 followed by DEN3; and DEN4 followed by DEN3. We also used this longitudinal data to train a machine learning algorithm on antibody titre differences between consecutive years to unveil asymptomatic dengue infections and estimate asymptomatic infection to clinical case ratios over time, allowing for a better characterisation of the population’s past exposure to different serotypes.
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130
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Cipitelli MDC, Amâncio Paiva I, Badolato-Corrêa J, de-Oliveira-Pinto LM. Influence of chemokines on the endothelial permeability and cellular transmigration during dengue. Immunol Lett 2019; 212:88-97. [PMID: 31181280 DOI: 10.1016/j.imlet.2019.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/24/2019] [Accepted: 06/06/2019] [Indexed: 01/31/2023]
Abstract
During a pathogenic infection, an inflammatory process is triggered in which several inflammatory mediators, such as cytokines, chemokines, growth factors, complement system components, nitric oxide, and others induce integrity alteration on the endothelial barrier. Chemokines are responsible for regulating leukocyte trafficking under homeostatic conditions as well as activating immune system cells under inflammatory conditions. They are crucial molecules in the early stages of infection, leading to the recruitment of immune cells, namely neutrophils, monocytes, natural killer (NK) cells, natural killer T cells (NKT), dendritic cells (DC), T lymphocytes and all cells expressing chemokine receptors for inflammatory sites. Other functions, such as collagen production, tissue repair, a proliferation of hematopoietic precursors and angiogenesis, are also performed by these molecules. Chemokines, amongst inflammatory mediators, play a key role in dengue immunopathogenesis. Dengue fever is a disease caused by the dengue virus (DENV). It is characterized by a broad spectrum of clinical manifestations ranging from asymptomatic cases to mild and severe symptomatic ones. As for the latter, the appearance of hemorrhagic manifestations and changes in vascular permeability may lead the patient to develop cavitary effusions, organ involvement, and even death. As chemokines exert an influence on various homeostatic and inflammatory processes, acting vigorously on vascular endothelial activation and cell migration, the main purpose of this chapter is to discuss the influence of chemokines on the alteration of endothelial permeability and migration of T lymphocytes in DENV infection.
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Affiliation(s)
- Márcio da Costa Cipitelli
- Laboratory of Viral Immunology, Oswaldo Cruz Institute, Oswaldo Cruz Fundation, Rio de Janeiro, Brazil
| | - Iury Amâncio Paiva
- Laboratory of Viral Immunology, Oswaldo Cruz Institute, Oswaldo Cruz Fundation, Rio de Janeiro, Brazil
| | - Jéssica Badolato-Corrêa
- Laboratory of Viral Immunology, Oswaldo Cruz Institute, Oswaldo Cruz Fundation, Rio de Janeiro, Brazil
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131
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Lizarazo E, Couto N, Vincenti-Gonzalez M, Raangs EC, Velasco Z, Bethencourt S, Jaenisch T, Friedrich AW, Tami A, Rossen JW. Applied shotgun metagenomics approach for the genetic characterization of dengue viruses. J Biotechnol 2019; 306S:100009. [PMID: 34112375 DOI: 10.1016/j.btecx.2019.100009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 05/05/2019] [Accepted: 05/06/2019] [Indexed: 12/19/2022]
Abstract
Dengue virus (DENV), an arthropod-borne virus, has rapidly spread in recent years. DENV diagnosis is performed through virus serology, isolation or molecular detection, while genotyping is usually done through Sanger sequencing of the envelope gene. This study aimed to optimize the use of shotgun metagenomics and subsequent bioinformatics analysis to detect and type DENV directly from clinical samples without targeted amplification. Additionally, presence of DENV quasispecies (intra-host variation) was revealed by detecting single nucleotide variants. Viral RNA was isolated with or without DNase-I treatment from 17 DENV (1-4) positive blood samples. cDNA libraries were generated using either a combination of the NEBNext® RNA to synthesize cDNA followed by Nextera XT DNA library preparation, or the TruSeq RNA V2 (TS) library preparation kit. Libraries were sequenced using both the MiSeq and NextSeq. Bioinformatic analysis showed complete ORFs for all samples by all approaches, but longer contigs and higher sequencing depths were obtained with the TS kit. No differences were observed between MiSeq and NextSeq sequencing. Detection of multiple DENV serotypes in a single sample was feasible. Finally, results were obtained within three days with associated reagents costs between €130-170/sample. Therefore, shotgun metagenomics is suitable for identification and typing of DENV in a clinical setting.
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Affiliation(s)
- Erley Lizarazo
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Natacha Couto
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Maria Vincenti-Gonzalez
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Erwin C Raangs
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Zoraida Velasco
- Universidad de Carabobo, Facultad Experimental de Ciencias y Tecnología, Departamento de Biología, Valencia, Venezuela
| | - Sarah Bethencourt
- Universidad de Carabobo, Facultad de Ciencias de la Salud. Departamento de Ciencias Fisiológicas, Unidad de Investigación en Inmunología, Valencia, Venezuela
| | - Thomas Jaenisch
- University of Heidelberg, Heidelberg University Hospital, Department of Infectious Diseases, Section of Clinical Tropical Medicine, Heidelberg, Germany
| | - Alexander W Friedrich
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands
| | - Adriana Tami
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands; Universidad de Carabobo, Facultad de Ciencias de la Salud, Departamento de Parasitología, Valencia, Venezuela
| | - John W Rossen
- University of Groningen, University Medical Center Groningen, Department of Medical Microbiology and Infection Prevention, Groningen, the Netherlands.
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132
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Development of a Standardized Sanger-Based Method for Partial Sequencing and Genotyping of Dengue Viruses. J Clin Microbiol 2019; 57:JCM.01957-18. [PMID: 30760533 DOI: 10.1128/jcm.01957-18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 01/22/2019] [Indexed: 11/20/2022] Open
Abstract
The global expansion of dengue viruses (DENV-1 to DENV-4) has contributed to the divergence, transmission, and establishment of genetic lineages of epidemiological concern; however, tracking the phylogenetic relationships of these virus is not always possible due to the inability of standardized sequencing procedures in resource-limited public health laboratories. Consequently, public genomic data banks contain inadequate representation of geographical regions and historical periods. In order to improve detection of the DENV-1 to DENV-4 lineages, we report the development of a serotype-specific Sanger-based method standardized to sequence DENV-1 to DENV-4 directly from clinical samples using universal primers that detect most DENV genotypes. The resulting envelope protein coding sequences are analyzed for genotyping with phylogenetic methods. We evaluated the performance of this method by detecting, amplifying, and sequencing 54 contemporary DENV isolates, including 29 clinical samples, representing a variety of genotypes of epidemiological importance and global presence. All specimens were sequenced successfully and phylogenetic reconstructions resulted in the expected genotype classification. To further improve genomic surveillance in regions where dengue is endemic, this method was transferred to 16 public health laboratories in 13 Latin American countries, to date. Our objective is to provide an accessible method that facilitates the integration of genomics with dengue surveillance.
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133
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Zárate S, Hernández-Perez F, Taboada B, Martínez NE, Alcaráz-Estrada SL, Del Moral O, Yocupicio-Monroy M. Complete genome of DENV2 isolated from mosquitoes in Mexico. INFECTION GENETICS AND EVOLUTION 2019; 71:98-107. [PMID: 30905775 DOI: 10.1016/j.meegid.2019.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 01/13/2019] [Accepted: 03/20/2019] [Indexed: 10/27/2022]
Abstract
Dengue virus is the most prevalent arbovirus in Mexico, and although the diversity of this virus has been studied, the vast majority of sequences have been derived from viruses isolated from the human host. In this work, we aimed to sequence and to analyze DENVs derived from wild mosquitoes captured in Acapulco Guerrero, Mexico. We succeeded in determining three full genome sequences of such viruses and were able to compare them with other reported sequences from human and mosquito-derived DENVs. We found 15 nonsynonymous and 88 synonymous substitutions that were present more frequently in mosquito viruses than what would be expected by chance, although the limited number of genomes reported so far puts a constraint on the conclusions that can be derived from these analyses. Also, given the high depth of coverage attained in one of the genomes a variant analysis was carried out, finding 68 polymorphic sites in this genome. Interestingly, six of them corresponded to SNV that were detected as potentially differential between mosquitoes and humans, indicating that a that at least some positions may be maintained as polymorphic, which may facilitate host transmission.
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Affiliation(s)
- Selene Zárate
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, México.
| | | | - Blanca Taboada
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, México
| | | | | | - Oscar Del Moral
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Guerrero, México
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Abstract
Chikungunya and Zika virus infections are emerging diseases in the Americas, and dengue continues to be the most prevalent arthropod-borne virus in the world. These arbovirus diseases may spread by endemic transmission or as travel-related infections and have rapidly expanded their geographic distribution secondary to vector spread. All 3 share a similar clinical picture that includes a maculopapular rash. Zika is characterized by pruritic rash, low-grade fever, and arthralgia. Congenital nervous system malformations are a growing public-health concern. Chikungunya distinctive dermatologic manifestations include facial melanosis and bullous eruption. Dengue bleeding complications may be life-threatening and require inpatient management.
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Affiliation(s)
- Jose Dario Martinez
- Department of Internal Medicine, University Hospital "Dr. José E. González", UANL, Mitras Centro, Avenida Gonzalitos y Madero S/N, Monterrey 64460, Mexico.
| | - Jesus Alberto Cardenas-de la Garza
- Department of Dermatology, University Hospital "Dr. José E. González", Universidad Autónoma de Nuevo León, Mitras Centro, Avenida Gonzalitos y Madero S/N, Monterrey 64460, Mexico
| | - Adrian Cuellar-Barboza
- Department of Dermatology, University Hospital "Dr. José E. González", Universidad Autónoma de Nuevo León, Mitras Centro, Avenida Gonzalitos y Madero S/N, Monterrey 64460, Mexico
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135
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Tahir Ul Qamar M, Maryam A, Muneer I, Xing F, Ashfaq UA, Khan FA, Anwar F, Geesi MH, Khalid RR, Rauf SA, Siddiqi AR. Computational screening of medicinal plant phytochemicals to discover potent pan-serotype inhibitors against dengue virus. Sci Rep 2019; 9:1433. [PMID: 30723263 PMCID: PMC6363786 DOI: 10.1038/s41598-018-38450-1] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 12/19/2018] [Indexed: 02/07/2023] Open
Abstract
Emergence of Dengue as one of the deadliest viral diseases prompts the need for development of effective therapeutic agents. Dengue virus (DV) exists in four different serotypes and infection caused by one serotype predisposes its host to another DV serotype heterotypic re-infection. We undertook virtual ligand screening (VLS) to filter compounds against DV that may inhibit inclusively all of its serotypes. Conserved non-structural DV protein targets such as NS1, NS3/NS2B and NS5, which play crucial role in viral replication, infection cycle and host interaction, were selected for screening of vital antiviral drug leads. A dataset of plant based natural antiviral derivatives was developed. Molecular docking was performed to estimate the spatial affinity of target compounds for the active sites of DV’s NS1, NS3/NS2B and NS5 proteins. The drug likeliness of the screened compounds was followed by ADMET analysis whereas the binding behaviors were further elucidated through molecular dynamics (MD) simulation experiments. VLS screened three potential compounds including Canthin-6-one 9-O-beta-glucopyranoside, Kushenol W and Kushenol K which exhibited optimal binding with all the three conserved DV proteins. This study brings forth novel scaffolds against DV serotypes to serve as lead molecules for further optimization and drug development against all DV serotypes with equal effect against multiple disease causing DV proteins. We therefore anticipate that the insights given in the current study could be regarded valuable towards exploration and development of a broad-spectrum natural anti-dengue therapy.
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Affiliation(s)
| | - Arooma Maryam
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Iqra Muneer
- School of Life Sciences, University of Science and Technology of China, Hefei, P.R. China
| | - Feng Xing
- College of Informatics, Huazhong Agricultural University, Wuhan, P.R. China
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Faheem Ahmed Khan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education China, Huazhong Agricultural University, Wuhan, P.R. China
| | - Farooq Anwar
- Department of Chemistry, University of Sargodha, Sargodha, Pakistan
| | - Mohammed H Geesi
- Department of Chemistry, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia.
| | - Rana Rehan Khalid
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Sadaf Abdul Rauf
- Department of Computer Science, Fatima Jinnah Women University, Rawalpindi, Pakistan
| | - Abdul Rauf Siddiqi
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan.
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136
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Radwan I, Magdy Khattab M, Mahmoud AR, Nghia TLB, Y MN, Trung DT, Hirayama K, Huy NT. Systematic review of spontaneous splenic rupture in dengue-infected patients. Rev Med Virol 2019; 29:e2029. [PMID: 30609179 DOI: 10.1002/rmv.2029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 11/06/2022]
Abstract
Dengue infection varies from a mild febrile form to more severe disease with plasma leakage, shock, and multiorgan failure. Several serious complications such as cardiomyopathy, encephalopathy, encephalitis, hepatic damage, and neural manifestations cause organ damage in dengue infection. Splenic rupture, a less well known but life-threatening complication, can occur in dengue. The mechanism of splenic rupture in dengue is still unclear. Optimal therapeutic management is required to save the lives of patients with this complication. The objective of this study was to conduct a systematic review of studies documenting the development of spontaneous nontraumatic splenic rupture in patients with dengue infection. In March 2018, a search was conducted systematically in nine electronic databases, in addition to hand- searching. A total of 127 references were exported to Endnote; 47 references remained after removing duplicates. Finally, 16 reports met the inclusion criteria and represented 17 cases. All articles were evaluated and data extracted according to predefined criteria: number of cases, age, sex, severity of dengue disease, days of illness before admission, methods of definitive diagnosis, timing of the event, and management and outcome. A total of 17 individual patients including 13 males and four females were found. Most of the patients were young adults (ranging from 20 to 52 years) and diagnosed with computed tomography scan and managed with splenectomy. Four cases were fatal. Pathological splenic rupture in dengue is a rare, life-threatening condition where timely management can achieve a favorable outcome.
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Affiliation(s)
- Ibrahim Radwan
- Faculty of Medicine, Ain Shams University, Cairo, Egypt.,Online Research Club, Nagasaki, Japan, http://www.onlineresearchclub.org
| | - Mohamed Magdy Khattab
- Online Research Club, Nagasaki, Japan, http://www.onlineresearchclub.org.,Faculty of Medicine, Al-Azhar University, Cairo, Egypt
| | - Abdalla Reda Mahmoud
- Online Research Club, Nagasaki, Japan, http://www.onlineresearchclub.org.,Faculty of Medicine, Minia University, Minia, Egypt
| | - Thai Le Ba Nghia
- Online Research Club, Nagasaki, Japan, http://www.onlineresearchclub.org.,Faculty of Medicine, Vo Truong Toan University, Hau Giang, Vietnam
| | - Mai Nhu Y
- Online Research Club, Nagasaki, Japan, http://www.onlineresearchclub.org.,Faculty of Medicine, Vo Truong Toan University, Hau Giang, Vietnam
| | - Dinh The Trung
- Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Nguyen Tien Huy
- Evidence Based Medicine Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Department of Clinical Product Development, Institute of Tropical Medicine (NEKKEN), School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
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137
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Gonçalves BDS, Horta MAP, Acero PHC, Bochner R, Queiroz Lima MDR, de Araújo ES, Sampaio SA, Nogueira RMR, de Filippis AMB. Dynamics of nonstructural glycoprotein-1 in dengue patients presenting with different clinical manifestations from 1986 to 2012 in Rio de Janeiro, Brazil. J Med Virol 2018; 91:555-563. [DOI: 10.1002/jmv.25356] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 11/06/2018] [Indexed: 01/12/2023]
Affiliation(s)
| | | | | | - Rosany Bochner
- Laboratory of Scientific and Technological Information in Health; Institute of Communication and Scientific and Technological Information in Health/ FIOCRUZ; Rio de Janeiro Brazil
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138
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Phadungsombat J, Lin MYC, Srimark N, Yamanaka A, Nakayama EE, Moolasart V, Suttha P, Shioda T, Uttayamakul S. Emergence of genotype Cosmopolitan of dengue virus type 2 and genotype III of dengue virus type 3 in Thailand. PLoS One 2018; 13:e0207220. [PMID: 30419004 PMCID: PMC6231660 DOI: 10.1371/journal.pone.0207220] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/26/2018] [Indexed: 01/27/2023] Open
Abstract
Dengue is a mosquito-borne disease that has spread to over 100 countries. Dengue fever is caused by dengue virus (DENV), which belongs to the Flavivirus genus of the family Flaviviridae. DENV comprises 4 serotypes (DENV-1 to DENV-4), and each serotype is divided into distinct genotypes. Thailand is an endemic area where all 4 serotypes of DENV co-circulate. To understand the current genotype distribution of DENVs in Thailand, we enrolled 100 cases of fever with dengue-like symptoms at the Bamrasnaradura Infectious Diseases Institute during 2016–2017. Among them, 37 cases were shown to be dengue-positive by real-time PCR. We were able to isolate DENVs from 21 cases, including 1 DENV-1, 8 DENV-2, 4 DENV-3, and 8 DENV-4. To investigate the divergence of the viruses, RNA was extracted from isolated DENVs and viral near-whole genome sequences were determined. Phylogenetic analysis of the obtained viral sequences revealed that DENV-2 genotype Cosmopolitan was co-circulating with DENV-2 genotype Asian-I, the previously predominating genotype in Thailand. Furthermore, DENV-3 genotype III was found instead of DENV-3 genotype II. The DENV-2 Cosmopolitan and DENV-3 genotype III found in Thailand were closely related to the respective strains found in nearby countries. These results indicated that DENVs in Thailand have increased in genotypic diversity, and suggested that the DENV genotypic shift observed in other Asian countries also might be taking place in Thailand.
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Affiliation(s)
- Juthamas Phadungsombat
- Mahidol-Osaka Center for Infectious Diseases (MOCID), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Narinee Srimark
- Mahidol-Osaka Center for Infectious Diseases (MOCID), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Atsushi Yamanaka
- Mahidol-Osaka Center for Infectious Diseases (MOCID), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Emi E. Nakayama
- Mahidol-Osaka Center for Infectious Diseases (MOCID), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Visal Moolasart
- Bamrasnaradura Infectious Diseases Institute, Nonthaburi, Thailand
| | - Patama Suttha
- Bamrasnaradura Infectious Diseases Institute, Nonthaburi, Thailand
| | - Tatsuo Shioda
- Mahidol-Osaka Center for Infectious Diseases (MOCID), Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Research Institute for Microbial Diseases, Osaka University, Suita, Japan
- * E-mail:
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139
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Sadeghi M, Altan E, Deng X, Barker CM, Fang Y, Coffey LL, Delwart E. Virome of > 12 thousand Culex mosquitoes from throughout California. Virology 2018; 523:74-88. [DOI: 10.1016/j.virol.2018.07.029] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/25/2018] [Accepted: 07/26/2018] [Indexed: 12/25/2022]
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140
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de Oliveira Dias JR, Ventura CV, de Paula Freitas B, Prazeres J, Ventura LO, Bravo-Filho V, Aleman T, Ko AI, Zin A, Belfort R, Maia M. Zika and the Eye: Pieces of a Puzzle. Prog Retin Eye Res 2018; 66:85-106. [PMID: 29698814 DOI: 10.1016/j.preteyeres.2018.04.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/05/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022]
Abstract
Zika virus (ZIKV) is an arbovirus mainly transmitted to humans by mosquitoes from Aedes genus. Other ways of transmission include the perinatal and sexual routes, blood transfusion, and laboratory exposure. Although the first human cases were registered in 1952 in African countries, outbreaks were only reported since 2007, when entire Pacific islands were affected. In March 2015, the first cases of ZIKV acute infection were notified in Brazil and, to date, 48 countries and territories in the Americas have confirmed local mosquito-borne transmission of ZIKV. Until 2015, ZIKV infection was thought to only cause asymptomatic or mild exanthematous febrile infections. However, after explosive ZIKV outbreaks in Polynesia and Latin American countries, it was confirmed that ZIKV could also lead to Guillain-Barré syndrome and congenital birth abnormalities. These abnormalities, which can include neurologic, ophthalmologic, audiologic, and skeletal findings, are now considered congenital Zika syndrome (CZS). Brain abnormalities in CZS include cerebral calcifications, malformations of cortical development, ventriculomegaly, lissencephaly, hypoplasia of the cerebellum and brainstem. The ocular findings, which are present in up to 70% of infants with CZS, include iris coloboma, lens subluxation, cataract, congenital glaucoma, and especially posterior segment findings. Loss of retinal pigment epithelium, the presence of a thin choroid, a perivascular choroidal inflammatory infiltrate, and atrophic changes within the optic nerve were seen in histologic analyses of eyes from deceased fetuses. To date, there is no ZIKV licensed vaccines or antiviral therapies are available for treatment. Preventive measures include individual protection from mosquito bites, control of mosquito populations and the use of barriers measures such as condoms during sexual intercourse or sexual abstinence for couples either at risk or after confirmed infection. A literature review based on studies that analyzed ocular findings in mothers and infants with CZS, with or without microcephaly, was conducted and a theoretical pathophysiologic explanation for ZIKV-ocular abnormalities was formulated.
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Affiliation(s)
- João Rafael de Oliveira Dias
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil
| | - Camila V Ventura
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil; Altino Ventura Foundation, Recife, Pernambuco, Brazil; HOPE Eye Hospital, Recife, Pernambuco, Brazil
| | - Bruno de Paula Freitas
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil; Department of Ophthalmology, Roberto Santos General Hospital, Salvador, Brazil
| | - Juliana Prazeres
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil
| | - Liana O Ventura
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil; Altino Ventura Foundation, Recife, Pernambuco, Brazil; HOPE Eye Hospital, Recife, Pernambuco, Brazil
| | - Vasco Bravo-Filho
- Altino Ventura Foundation, Recife, Pernambuco, Brazil; HOPE Eye Hospital, Recife, Pernambuco, Brazil
| | - Tomas Aleman
- Scheie Eye Institute at the Perelman Center for Advanced Medicine, Perelman School of Medicine, Department of Ophthalmology, University of Pennsylvania, Philadelphia, United States
| | - Albert Icksang Ko
- Gonçalo Moniz Research Center, Oswaldo Cruz Foundation, Salvador, Brazil; Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, CT, United States
| | - Andréa Zin
- Clinical Research Unit, Fernandes Figueira Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Rubens Belfort
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil
| | - Mauricio Maia
- Vision Institute, Department of Ophthalmology, Paulista Medical School, Federal University of São Paulo, São Paulo, Brazil; Brazilian Institute of Fight Against Blindness, Assis and Presidente Prudente, São Paulo, Brazil.
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141
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Jiménez-Silva CL, Carreño MF, Ortiz-Baez AS, Rey LA, Villabona-Arenas CJ, Ocazionez RE. Evolutionary history and spatio-temporal dynamics of dengue virus serotypes in an endemic region of Colombia. PLoS One 2018; 13:e0203090. [PMID: 30157270 PMCID: PMC6114916 DOI: 10.1371/journal.pone.0203090] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Accepted: 08/14/2018] [Indexed: 12/27/2022] Open
Abstract
Dengue is a prevalent disease in Colombia and all dengue virus serotypes (DENV-1 to -4) co-circulate in the country since 2001. However, the relative impact of gene flow and local diversification on epidemic dynamics is unknown due to heterogeneous sampling and lack of sufficient genetic data. The region of Santander is one of the areas with the highest incidence of dengue in Colombia. To provide a better understanding of the epidemiology of dengue, we inferred DENV population dynamics using samples collected between 1998 and 2015. We used Bayesian phylogenetic analysis and included 143 new envelope gene sequences from Colombia, mainly from the region of Santander, and 235 published sequences from representative countries in the Americas. We documented one single genotype for each serotype but multiple introductions. Whereas the majority of DENV-1, DENV-2, and DENV-4 strains fell into one single lineage, DENV-3 strains fell into two distinct lineages that co-circulated. The inferred times to the most recent common ancestors for the most recent clades of DENV-1, DENV-2, and DENV-4 fell between 1977 and 1987, and for DENV-3 was around 1995. Demographic reconstructions suggested a gradual increase in viral diversity over time. A phylogeographical analysis underscored that Colombia mainly receives viral lineages and a significant diffusion route between Colombia and Venezuela. Our findings contribute to a better understanding of the viral diversity and dengue epidemiology in Colombia.
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Affiliation(s)
- Cinthy L. Jiménez-Silva
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales (CINTROP), Universidad Industrial de Santander, Bucaramanga, Colombia
| | - María Fernanda Carreño
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales (CINTROP), Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Ayda Susana Ortiz-Baez
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales (CINTROP), Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Luz Aida Rey
- Unidad de Epidemiología Clínica, Escuela de Medicina, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Christian Julián Villabona-Arenas
- Laboratoire TransVIHMI, Institut de Recherche pour le Développement (IRD), Université de Montpellier, Montpellier, France
- Laboratoire d'Informatique, de Robotique et de Microélectronique de Montpellier (LIRMM), Institut de Biologie Computationnelle (IBC), Université de Montpellier, Montpellier, France
| | - Raquel E. Ocazionez
- Laboratorio de Arbovirus, Centro de Investigaciones en Enfermedades Tropicales (CINTROP), Universidad Industrial de Santander, Bucaramanga, Colombia
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142
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Masyeni S, Yohan B, Somia IKA, Myint KSA, Sasmono RT. Dengue infection in international travellers visiting Bali, Indonesia. J Travel Med 2018; 25:5065180. [PMID: 30113689 PMCID: PMC6118167 DOI: 10.1093/jtm/tay061] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 08/10/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND Dengue, an acute febrile illness caused by infection with dengue virus (DENV), is endemic in Bali, Indonesia. As one of the world's most popular tourist destinations, Bali is regularly visited by domestic and international travellers, who are prone to infection by endemic pathogens, including DENV. Currently, limited data are available on the characteristics of dengue in travellers visiting Bali. Information on the epidemiology and virological aspects of dengue in these tourists is important to gain a better understanding of the dengue disease in international travellers. METHODS We performed a prospective cross-sectional dengue study involving foreign travellers visiting Bali, Indonesia in the period of 2015-17. Patients presenting at Kasih Ibu Hospital with fever and clinical symptoms of dengue were asked to participate in the study. Clinical and laboratory assessments were performed and sera were collected for molecular analysis, which included DENV serotyping, genome sequencing and phylogenetic analysis. RESULTS Among the 201 patients recruited, dengue was confirmed in 133 (66.2%) of them, based on detection of NS1 antigen and/or viral RNA. Of these, 115 (86.5%) manifested dengue fever (DF) and 18 (13.5%) dengue haemorrhagic fever (DHF). The temporal predominance of infecting DENV serotype was DENV-2 (48.7%), followed by DENV-3 (36.1%), DENV-1 (9.2%) and DENV-4 (3.4%). Phylogenetic analysis of DENV based on envelope gene sequences revealed that the source of DENVs was local endemic viruses. CONCLUSION Our study confirms that dengue is one of the causes of fever in travellers visiting Bali. Although it is a cause of significant morbidity, the majority of patients only experienced mild DF, with only a small proportion developing DHF. We revealed that DENVs isolated were autochthonous. Accurate diagnosis, preventive measures and continuous disease surveillance will be useful for better management of dengue infection in travellers.
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Affiliation(s)
- Sri Masyeni
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Warmadewa University, Denpasar, Bali, Indonesia
| | | | - I Ketut Agus Somia
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Udayana University, Denpasar, Bali, Indonesia
| | - Khin S A Myint
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia
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Jiang L, Ma D, Ye C, Li L, Li X, Yang J, Zhao Y, Xi J, Wang X, Chen J, Pan Y, Shan X, Sun Q. Molecular Characterization of Dengue Virus Serotype 2 Cosmospolitan Genotype From 2015 Dengue Outbreak in Yunnan, China. Front Cell Infect Microbiol 2018; 8:219. [PMID: 29998087 PMCID: PMC6030573 DOI: 10.3389/fcimb.2018.00219] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 06/08/2018] [Indexed: 01/08/2023] Open
Abstract
In 2015, a dengue outbreak with 1,067 reported cases occurred in Xishuangbanna, a city in China that borders Burma and Laos. To characterize the virus, the complete genome sequence was obtained and phylogenetic, mutation, substitution and recombinant analyses were performed. DENV-NS1 positive serum samples were collected from dengue fever patients, and complete genome sequences were obtained through RT-qPCR from these serum samples. Phylogenetic trees were then constructed by maximum likelihood phylogeny test (MEGA7.0), followed by analysis of nucleotide mutation and amino acid substitution. The recombination events among DENVs were also analyzed by RDP4 package. The diversity analysis of secondary structure for translated viral proteins was also performed. The complete genome sequences of four amplified viruses (YNXJ10, YNXJ12, YNXJ13, and YNXJ16) were 10,742, 10,742, 10,741, and 10,734 nucleotides in length, and phylogenetic analysis classified the viruses as cosmopolitan genotype of DENV-2. All viruses were close to DENV Singapore 2013 (KX380828.1) and the DENV China 2013 (KF479233.1). In comparison to DENV-2SS (M29095), the total numbers of base substitutions were 712 nt (YNXJ10), 809 nt (YNXJ12), 772 nt (YNXJ13), and 841 nt (YNXJ16), resulting in 109, 171, 130, and 180 amino acid substitutions in translated regions, respectively. In addition, compared with KX380828.1, there were 44, 105, 64, and 116 amino acid substitutions in translated regions, respectively. The highest mutation rate occurred in the prM region, and the lowest mutation rate occurred in the NS4B region. Most of the recombination events occurred in the prM, E and NS2B/3 regions, which corresponded with the mutation frequency of the related portion. Secondary structure prediction within the 3,391 amino acids of DENV structural proteins showed there were 7 new possible nucleotide-binding sites and 6 lost sites compared to DENV-2SS. In addition, 41 distinct amino acid changes were found in the helix regions, although the distribution of the exposed and buried regions changed only slightly. Our findings may help to understand the intrinsic geographical relatedness of DENV-2 and contributes to the understanding of viral evolution and its impact on the epidemic potential and pathogenicity of DENV.
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Affiliation(s)
- Liming Jiang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Dehong Ma
- Xishuangbanna Dai Autonomous Prefecture People's Hospital, Xishuangbanna, China
| | - Chao Ye
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China.,School of Basic Medicine, Kunming Medical University, Kunming, China
| | - Lihua Li
- Xishuangbanna Dai Autonomous Prefecture People's Hospital, Xishuangbanna, China
| | - Xiaoman Li
- The Affiliated Children's Hospital of Kunming Medical University, Kunming, China
| | - Jiajia Yang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Yujiao Zhao
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Juemin Xi
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Xiaodan Wang
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Junying Chen
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Yue Pan
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
| | - Xiyun Shan
- Xishuangbanna Dai Autonomous Prefecture People's Hospital, Xishuangbanna, China
| | - Qiangming Sun
- Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, China.,Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China.,Yunnan Key Laboratory of Vector-borne Infectious Disease, Kunming, China
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Complete Coding Sequences of Five Dengue Virus Type 2 Clinical Isolates from Venezuela Obtained through Shotgun Metagenomics. GENOME ANNOUNCEMENTS 2018; 6:6/25/e00545-18. [PMID: 29930056 PMCID: PMC6013635 DOI: 10.1128/genomea.00545-18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Dengue is a disease endemic in Latin American countries, like Venezuela, and has become one of the most important public health problems. We report five complete coding sequences of dengue virus serotype 2 (DENV-2) isolated from DENV-infected patients in Venezuela. Phylogenetic analysis placed the isolates within the American/Asian genotype.
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145
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Rodriguez-Manzano J, Chia PY, Yeo TW, Holmes A, Georgiou P, Yacoub S. Improving Dengue Diagnostics and Management Through Innovative Technology. Curr Infect Dis Rep 2018; 20:25. [PMID: 29882167 PMCID: PMC5992235 DOI: 10.1007/s11908-018-0633-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW Dengue continues to be a major global public health threat. Symptomatic infections can cause a spectrum of disease ranging from a mild febrile illness to severe and potentially life-threatening manifestations. Management relies on supportive treatment with careful fluid replacement. The purpose of this review is to define the unmet needs and challenges in current dengue diagnostics and patient monitoring and outline potential novel technologies to address these needs. RECENT FINDINGS There have been recent advances in molecular and point-of-care (POC) diagnostics as well as technologies including wireless communication, low-power microelectronics, and wearable sensors that have opened up new possibilities for management, clinical monitoring, and real-time surveillance of dengue. Novel platforms utilizing innovative technologies for POC dengue diagnostics and wearable patient monitors have the potential to revolutionize dengue surveillance, outbreak response, and management at population and individual levels. Validation studies of these technologies are urgently required in dengue-endemic areas.
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Affiliation(s)
- Jesus Rodriguez-Manzano
- Centre for Bio-inspired Technology, Department of Electrical and Electronic Engineering, Imperial College London, London, UK
| | - Po Ying Chia
- Communicable Diseases Centre, Institute for Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore
| | - Tsin Wen Yeo
- Communicable Diseases Centre, Institute for Infectious Disease and Epidemiology, Tan Tock Seng Hospital, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technical University, Singapore, Singapore
| | - Alison Holmes
- Department of Medicine, Imperial College London, London, UK
| | - Pantelis Georgiou
- Centre for Bio-inspired Technology, Department of Electrical and Electronic Engineering, Imperial College London, London, UK
| | - Sophie Yacoub
- Department of Medicine, Imperial College London, London, UK.
- Singapore-MIT Alliance for Research and Technology, Singapore, Singapore.
- Oxford University Clinical Research Unit, Wellcome Trust Asia Programme, Ho Chi Minh City, Vietnam.
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Wong YH, Kumar A, Liew CW, Tharakaraman K, Srinivasaraghavan K, Sasisekharan R, Verma C, Lescar J. Molecular basis for dengue virus broad cross-neutralization by humanized monoclonal antibody 513. Sci Rep 2018; 8:8449. [PMID: 29855525 PMCID: PMC5981469 DOI: 10.1038/s41598-018-26800-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 05/21/2018] [Indexed: 12/18/2022] Open
Abstract
Dengue is a widespread viral disease with 3.6 billion people at risk worldwide. Humanized monoclonal antibody (mAb) 513, currently undergoing clinical trials in Singapore, targets an epitope on the envelope protein domain III exposed at the surface of the viral particle. This antibody potently neutralizes all four dengue virus serotypes in a humanized mouse model that recapitulates human dengue infection, without signs of antibody-mediated enhancement of the disease. The crystal structure of single-chain variable fragment (scFv) 513 bound to the envelope protein domain III from dengue virus serotype 4 was used as a template to explore the molecular origins of the broader cross-reactivity and increased in vivo potency of mAb 513, compared to the parent murine mAb 4E11, using molecular dynamics simulations and network analyses. These two methods are a powerful complement to existing structural and binding data and detail specific interactions that underpin the differential binding of the two antibodies. We found that a Glu at position H55 (GluH55) from the second Complementarity Determining Region of the Heavy chain (CDR-H2) which corresponds to Ala in 4E11, is a major contributor to the enhancement in the interactions of mAb 513 compared to 4E11. Importantly, we also validate the importance of GluH55 using site-directed mutagenesis followed by isothermal titration calorimetry measurements.
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Affiliation(s)
- Yee Hwa Wong
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.,Nanyang Institute of Structural Biology, Experimental Medicine Building, 59 Nanyang Drive, Singapore, 636921, Singapore
| | - Akshita Kumar
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.,Infectious Diseases Interdisciplinary Research group, Singapore MIT Alliance for Research & Technology, Singapore, Singapore.,Bioinformatics Institute, ASTAR, 30 Biopolis Street, #07-01 Matrix, 138671, Singapore, Singapore
| | - Chong Wai Liew
- Nanyang Institute of Structural Biology, Experimental Medicine Building, 59 Nanyang Drive, Singapore, 636921, Singapore
| | | | - Kannan Srinivasaraghavan
- Bioinformatics Institute, ASTAR, 30 Biopolis Street, #07-01 Matrix, 138671, Singapore, Singapore
| | - Ram Sasisekharan
- Department of Biological engineering MIT, Cambridge, United Kingdom.,Infectious Diseases Interdisciplinary Research group, Singapore MIT Alliance for Research & Technology, Singapore, Singapore
| | - Chandra Verma
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore. .,Bioinformatics Institute, ASTAR, 30 Biopolis Street, #07-01 Matrix, 138671, Singapore, Singapore.
| | - Julien Lescar
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore. .,Infectious Diseases Interdisciplinary Research group, Singapore MIT Alliance for Research & Technology, Singapore, Singapore. .,Nanyang Institute of Structural Biology, Experimental Medicine Building, 59 Nanyang Drive, Singapore, 636921, Singapore.
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147
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Gloria-Soria A, Armstrong PM, Powell JR, Turner PE. Infection rate of Aedes aegypti mosquitoes with dengue virus depends on the interaction between temperature and mosquito genotype. Proc Biol Sci 2018; 284:rspb.2017.1506. [PMID: 28978730 DOI: 10.1098/rspb.2017.1506] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 09/04/2017] [Indexed: 11/12/2022] Open
Abstract
Dengue fever is the most prevalent arthropod-transmitted viral disease worldwide, with endemic transmission restricted to tropical and subtropical regions of different temperature profiles. Temperature is epidemiologically relevant because it affects dengue infection rates in Aedes aegypti mosquitoes, the major vector of the dengue virus (DENV). Aedes aegypti populations are also known to vary in competence for different DENV genotypes. We assessed the effects of mosquito and virus genotype on DENV infection in the context of temperature by challenging Ae. aegypti from two locations in Vietnam, which differ in temperature regimes, with two isolates of DENV-2 collected from the same two localities, followed by incubation at 25, 27 or 32°C for 10 days. Genotyping of the mosquito populations and virus isolates confirmed that each group was genetically distinct. Extrinsic incubation temperature (EIT) and DENV-2 genotype had a direct effect on the infection rate, consistent with previous studies. However, our results show that the EIT impacts the infection rate differently in each mosquito population, indicating a genotype by environment interaction. These results suggest that the magnitude of DENV epidemics may not only depend on the virus and mosquito genotypes present, but also on how they interact with local temperature. This information should be considered when estimating vector competence of local and introduced mosquito populations during disease risk evaluation.
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Affiliation(s)
- A Gloria-Soria
- Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect St. PO Box 208106, New Haven, CT 06520-8106, USA
| | - P M Armstrong
- The Connecticut Agricultural Experiment Station, 123 Huntington St. PO Box 1106, New Haven, CT 06504, USA
| | - J R Powell
- Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect St. PO Box 208106, New Haven, CT 06520-8106, USA
| | - P E Turner
- Department of Ecology and Evolutionary Biology, Yale University, 165 Prospect St. PO Box 208106, New Haven, CT 06520-8106, USA.,Program in Microbiology, Yale School of Medicine, New Haven, CT 06520, USA
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148
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Dwivedi VD, Tripathi IP, Tripathi RC, Bharadwaj S, Mishra SK. Genomics, proteomics and evolution of dengue virus. Brief Funct Genomics 2018; 16:217-227. [PMID: 28073742 DOI: 10.1093/bfgp/elw040] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The genome of a pathogenic organism possesses a specific order of nucleotides that contains not only information about the synthesis and expression of proteomes, which are required for its growth and survival, but also about its evolution. Inhibition of any particular protein, which is required for the survival of that pathogenic organism, can be used as a potential therapeutic target for the development of effective drugs to treat its infections. In this review, the genomics, proteomics and evolution of dengue virus have been discussed, which will be helpful in better understanding of its origin, growth, survival and evolution, and may contribute toward development of new efficient anti-dengue drugs.
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149
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Lopez-Jimena B, Bekaert M, Bakheit M, Frischmann S, Patel P, Simon-Loriere E, Lambrechts L, Duong V, Dussart P, Harold G, Fall C, Faye O, Sall AA, Weidmann M. Development and validation of four one-step real-time RT-LAMP assays for specific detection of each dengue virus serotype. PLoS Negl Trop Dis 2018; 12:e0006381. [PMID: 29813062 PMCID: PMC5973574 DOI: 10.1371/journal.pntd.0006381] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 03/12/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND 4 one-step, real-time, reverse transcription loop-mediated isothermal amplification (RT-LAMP) assays were developed for the detection of dengue virus (DENV) serotypes by considering 2,056 full genome DENV sequences. DENV1 and DENV2 RT-LAMP assays were validated with 31 blood and 11 serum samples from Tanzania, Senegal, Sudan and Mauritania. DENV3 and DENV4 RT-LAMP assays were validated with 25 serum samples from Cambodia. METHODOLOGY/PRINCIPAL FINDINGS 4 final reaction primer mixes were obtained by using a combination of Principal Component Analysis of the full DENV genome sequences, and LAMP primer design based on sequence alignments using the LAVA software. These mixes contained 14 (DENV1), 12 (DENV2), 8 (DENV3) and 3 (DENV4) LAMP primer sets. The assays were evaluated with an External Quality Assessment panel from Quality Control for Molecular Diagnostics. The assays were serotype-specific and did not cross-detect with other flaviviruses. The limits of detection, with 95% probability, were 22 (DENV1), 542 (DENV2), 197 (DENV3) and 641 (DENV4) RNA molecules, and 100% reproducibility in the assays was obtained with up to 102 (DENV1) and 103 RNA molecules (DENV2, DENV3 and DENV4). Validation of the DENV2 assay with blood samples from Tanzania resulted in 23 samples detected by RT-LAMP, demonstrating that the assay is 100% specific and 95.8% sensitive (positive predictive value of 100% and a negative predictive value of 85.7%). All serum samples from Senegal, Sudan and Mauritania were detected and 3 untyped as DENV1. The sensitivity of RT-LAMP for DENV4 samples from Cambodia did not quite match qRT-PCR. CONCLUSIONS/SIGNIFICANCE We have shown a novel approach to design LAMP primers that makes use of fast growing sequence databases. The DENV1 and DENV2 assays were validated with viral RNA extracted clinical samples, showing very good performance parameters.
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Affiliation(s)
- Benjamin Lopez-Jimena
- Institute of Aquaculture, University of Stirling, Stirling, Scotland, United Kingdom
| | - Michaël Bekaert
- Institute of Aquaculture, University of Stirling, Stirling, Scotland, United Kingdom
| | | | | | - Pranav Patel
- Robert Koch Institute, Centre for biological security 1 (ZBS1), Berlin, Germany
| | - Etienne Simon-Loriere
- Functional Genetics of Infectious Diseases Unit, Department of Genomes and Genetics, Institut Pasteur, Paris, France
- Centre National de la Recherche Scientifique, Unité de Recherche Associée, Paris, France
| | - Louis Lambrechts
- Centre National de la Recherche Scientifique, Unité de Recherche Associée, Paris, France
- Insect-Virus Interactions Group, Department of Genomes and Genetics, Institut Pasteur, Paris, France
| | - Veasna Duong
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Philippe Dussart
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Graham Harold
- Institute of Aquaculture, University of Stirling, Stirling, Scotland, United Kingdom
| | - Cheikh Fall
- Arbovirus and viral haemorrhagic fever unit, Institut Pasteur de Dakar, Institut Pasteur International Network, Dakar, Senegal
| | - Oumar Faye
- Arbovirus and viral haemorrhagic fever unit, Institut Pasteur de Dakar, Institut Pasteur International Network, Dakar, Senegal
| | - Amadou Alpha Sall
- Arbovirus and viral haemorrhagic fever unit, Institut Pasteur de Dakar, Institut Pasteur International Network, Dakar, Senegal
| | - Manfred Weidmann
- Institute of Aquaculture, University of Stirling, Stirling, Scotland, United Kingdom
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Pollett S, Melendrez MC, Maljkovic Berry I, Duchêne S, Salje H, Cummings DAT, Jarman RG. Understanding dengue virus evolution to support epidemic surveillance and counter-measure development. INFECTION GENETICS AND EVOLUTION 2018; 62:279-295. [PMID: 29704626 DOI: 10.1016/j.meegid.2018.04.032] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 04/20/2018] [Accepted: 04/24/2018] [Indexed: 11/30/2022]
Abstract
Dengue virus (DENV) causes a profound burden of morbidity and mortality, and its global burden is rising due to the co-circulation of four divergent DENV serotypes in the ecological context of globalization, travel, climate change, urbanization, and expansion of the geographic range of the Ae.aegypti and Ae.albopictus vectors. Understanding DENV evolution offers valuable opportunities to enhance surveillance and response to DENV epidemics via advances in RNA virus sequencing, bioinformatics, phylogenetic and other computational biology methods. Here we provide a scoping overview of the evolution and molecular epidemiology of DENV and the range of ways that evolutionary analyses can be applied as a public health tool against this arboviral pathogen.
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Affiliation(s)
- S Pollett
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA; Marie Bashir Institute, University of Sydney, NSW, Australia; Institute for Global Health Sciences, University of California at San Francisco, CA, USA.
| | - M C Melendrez
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
| | - I Maljkovic Berry
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
| | - S Duchêne
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Australia
| | - H Salje
- Institut Pasteur, Paris, France; Johns Hopkins School of Public Health, Baltimore, MD, USA
| | - D A T Cummings
- Johns Hopkins School of Public Health, Baltimore, MD, USA; University of Florida, FL, USA
| | - R G Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, MD, USA
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