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Ouédraogo JCRP, Ilboudo S, Bado P, Compaoré TR, Tougma A, Nitiéma M, Zouré AA, Belemnaba L, Ouédraogo S, Savadogo LGB. Estimating dengue burden among family contacts through cluster investigation around probable cases in 2022 and 2023 in the Central Region, Burkina Faso. Infect Dis Poverty 2024; 13:45. [PMID: 38867325 PMCID: PMC11167875 DOI: 10.1186/s40249-024-01212-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Accepted: 05/31/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND In 2023, Burkina Faso experienced the largest dengue epidemic ever in Africa. This study aimed to estimate the prevalence of symptomatic, subclinical, and asymptomatic dengue and determine the associated factors among adult contacts of dengue in the Central Region, Burkina Faso. METHODS This cross-sectional study included contacts of dengue probable cases through cluster sampling in 2022-2023. These suspected cases that tested positive were identified from the five health facilities (Pissy CMA, Saaba CM, Kossodo CMA, Samandin CM, and Marcoussis CSPS) that reported the highest number of cases in 2021 per district. All participants underwent dengue and malaria rapid diagnostic tests (RDT). Samples positive for non-structural 1 protein antigen (AgNS1) and/or immunoglobulin M (IgM) were tested for serotype detection by reverse transcription polymerase chain reaction (RT-PCR). Binary logistic regression was done to identify the determinants of asymptomatic, subclinical, and symptomatic dengue among contacts of probable dengue cases. RESULTS A total of 484 contacts were included, mostly in 2023 (75.2%). Most participants were females (58.6%), residing (24.3%) and passing their daytime (23.1%) in Saaba. The overall prevalence of dengue was estimated at 15.1% [95% confidence interval (CI): 12.0-18.6%], representing cases not seeking care in hospitals. Asymptomatic cases represented 2.9% (95% CI: 1.6-4.8%). Subclinical and symptomatic cases accounted for 6.0% (95% CI: 4.1-8.5%) and 6.2% (95% CI: 4.2-8.7%), respectively. Of the 58 samples tested by RT-PCR, 10 were confirmed for serotype 3 in 2023. Malaria cases were estimated at 5.6% (95% CI: 3.7-8.0%). After adjustment, participants claiming that a virus transmits dengue were likelier to have asymptomatic dengue [adjusted odds ratio (aOR) = 7.1, 95% CI: 2.4-21.0]. From the multivariable analysis, subclinical dengue was statistically associated with being included in the study in 2023 (aOR = 30.2, 95% CI: 2.0-455.5) and spending the daytime at Arrondissement 4 (aOR = 11.5, 95% CI: 1.0-131.0). After adjustment, symptomatic dengue was associated with living less than 50 m away from cultivated land (aOR = 2.8, 95% CI: 1.1-6.9) and living less than 50 m from a stretch of water (aOR = 0.1, 95% CI: 0.0-0.6). CONCLUSIONS The overall burden of dengue among populations not seeking care in hospitals was quite high, with few asymptomatic cases. Efforts to manage dengue cases should also target non-hospital cases and raise population awareness. The 2023 epidemic could be due to dengue virus (DENV)-3.
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Affiliation(s)
- Jean Claude Romaric Pingdwindé Ouédraogo
- Drug Development Laboratory, African Centre of Excellence for Training, Research and Expertise in Drug Sciences, (LADME/CEA-CFOREM), Joseph Ki-Zerbo University, Ouagadougou, Burkina Faso.
- Phytomedicines and Medicines Research and Development Laboratory (LR-D/PM), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso.
- International Research Laboratory - Environment, Health, and Societies (IRL 3189, ESS), CNRST, Ouagadougou, Burkina Faso.
| | - Sylvain Ilboudo
- Drug Development Laboratory, African Centre of Excellence for Training, Research and Expertise in Drug Sciences, (LADME/CEA-CFOREM), Joseph Ki-Zerbo University, Ouagadougou, Burkina Faso
- Phytomedicines and Medicines Research and Development Laboratory (LR-D/PM), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
- International Research Laboratory - Environment, Health, and Societies (IRL 3189, ESS), CNRST, Ouagadougou, Burkina Faso
| | - Prosper Bado
- Pietro Annigoni Biomolecular Research Centre (CERBA), Ouagadougou, Burkina Faso
| | - Tegwindé Rebeca Compaoré
- Research Laboratory for Infectious and Parasitic Diseases (LR/MIP), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
| | - Alix Tougma
- International Research Laboratory - Environment, Health, and Societies (IRL 3189, ESS), CNRST, Ouagadougou, Burkina Faso
- Joseph KI-ZERBO University/University Centre of Ziniaré, Ziniaré, Burkina Faso
| | - Mathieu Nitiéma
- Phytomedicines and Medicines Research and Development Laboratory (LR-D/PM), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
- International Research Laboratory - Environment, Health, and Societies (IRL 3189, ESS), CNRST, Ouagadougou, Burkina Faso
| | - Abdou Azaque Zouré
- Research Laboratory for Infectious and Parasitic Diseases (LR/MIP), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
| | - Lazare Belemnaba
- Drug Development Laboratory, African Centre of Excellence for Training, Research and Expertise in Drug Sciences, (LADME/CEA-CFOREM), Joseph Ki-Zerbo University, Ouagadougou, Burkina Faso
- Phytomedicines and Medicines Research and Development Laboratory (LR-D/PM), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
| | - Sylvin Ouédraogo
- Phytomedicines and Medicines Research and Development Laboratory (LR-D/PM), Research Institute for Health Sciences (IRSS)/ CNRST, Ouagadougou, Burkina Faso
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Kawiecki AB, Morrison AC, Barker CM. Spatial and temporal analysis on the impact of ultra-low volume indoor insecticide spraying on Aedes aegypti household density. Parasit Vectors 2024; 17:254. [PMID: 38863023 PMCID: PMC11165869 DOI: 10.1186/s13071-024-06308-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 04/25/2024] [Indexed: 06/13/2024] Open
Abstract
BACKGROUND Aedes aegypti is the primary mosquito vector for several arboviruses, such as dengue, chikungunya and Zika viruses, which cause frequent outbreaks of human disease in tropical and subtropical regions. Control of these outbreaks relies on vector control, commonly in the form of insecticide sprays that target adult female mosquitoes. However, the spatial coverage and frequency of sprays needed to optimize effectiveness are unclear. In this study, we characterize the effect of ultra-low-volume (ULV) indoor spraying of pyrethroid insecticides on Ae. aegypti abundance within households. We also evaluate the effects of spray events during recent time periods or in neighboring households. Improved understanding of the duration and distance of the impact of a spray intervention on Ae. aegypti populations can inform vector control interventions, in addition to modeling efforts that contrast vector control strategies. METHODS This project analyzes data from two large-scale experiments that involved six cycles of indoor pyrethroid spray applications in 2 years in the Amazonian city of Iquitos, Peru. We developed spatial multi-level models to disentangle the reduction in Ae. aegypti abundance that resulted from (i) recent ULV treatment within households and (ii) ULV treatment of adjacent or nearby households. We compared fits of models across a range of candidate weighting schemes for the spray effect, based on different temporal and spatial decay functions to understand lagged ULV effects. RESULTS Our results suggested that the reduction of Ae. aegypti in a household was mainly due to spray events occurring within the same household, with no additional effect of sprays that occurred in neighboring households. Effectiveness of a spray intervention should be measured based on time since the most recent spray event, as we found no cumulative effect of sequential sprays. Based on our model, we estimated the spray effect is reduced by 50% approximately 28 days after the spray event. CONCLUSIONS The reduction of Ae. aegypti in a household was mainly determined by the number of days since the last spray intervention in that same household, highlighting the importance of spray coverage in high-risk areas with a spray frequency determined by local viral transmission dynamics.
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Affiliation(s)
| | | | - Christopher M Barker
- University of California Davis, Davis, CA, USA.
- Pacific Southwest Center of Excellence in Vector-Borne Diseases, University of California Davis, Davis, CA, USA.
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Vicco A, McCormack C, Pedrique B, Ribeiro I, Malavige GN, Dorigatti I. A scoping literature review of global dengue age-stratified seroprevalence data: estimating dengue force of infection in endemic countries. EBioMedicine 2024; 104:105134. [PMID: 38718682 PMCID: PMC11096825 DOI: 10.1016/j.ebiom.2024.105134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND Dengue poses a significant burden worldwide, and a more comprehensive understanding of the heterogeneity in the intensity of dengue transmission within endemic countries is necessary to evaluate the potential impact of public health interventions. METHODS This scoping literature review aimed to update a previous study of dengue transmission intensity by collating global age-stratified dengue seroprevalence data published in the Medline, Embase and Web of Science databases from 2014 to 2023. These data were then utilised to calibrate catalytic models and estimate the force of infection (FOI), which is the yearly per-capita risk of infection for a typical susceptible individual. FINDINGS We found a total of 66 new publications containing 219 age-stratified seroprevalence datasets across 30 endemic countries. Together with the previously available average FOI estimates, there are now more than 250 dengue average FOI estimates obtained from seroprevalence studies from across the world. INTERPRETATION The results show large heterogeneities in average dengue FOI both across and within countries. These new estimates can be used to inform ongoing modelling efforts to improve our understanding of the drivers of the heterogeneity in dengue transmission globally, which in turn can help inform the optimal implementation of public health interventions. FUNDING UK Medical Research Council, Wellcome Trust, Community Jameel, Drugs for Neglected Disease initiative (DNDi) funded by the French Development Agency, Médecins Sans Frontières International; Swiss Agency for Development and Cooperation and UK aid.
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Affiliation(s)
- Anna Vicco
- Department of Molecular Medicine, University of Padua, Padua, Italy; MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom.
| | - Clare McCormack
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom
| | - Belen Pedrique
- Drugs for Neglected Diseases Initiative (DNDi), Geneva, Switzerland
| | - Isabela Ribeiro
- Drugs for Neglected Diseases Initiative (DNDi), Geneva, Switzerland
| | | | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Jameel Institute, Imperial College London, London, United Kingdom.
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Chen Y, Li Y, Lu L, Zou P. Zafirlukast, as a viral inactivator, potently inhibits infection of several flaviviruses, including Zika virus, dengue virus, and yellow fever virus. Antimicrob Agents Chemother 2024:e0016824. [PMID: 38809067 DOI: 10.1128/aac.00168-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 05/02/2024] [Indexed: 05/30/2024] Open
Abstract
Zika virus (ZIKV) is one of the mosquito-borne flaviviruses that exhibits a unique tropism to nervous systems and is associated with Guillain-Barre syndrome and congenital Zika syndrome (CZS). Dengue virus (DENV) and yellow fever virus (YFV), the other two mosquito-borne flaviviruses, have also been circulating for a long time and cause severe diseases, such as dengue hemorrhagic fever and yellow fever, respectively. However, there are no safe and effective antiviral drugs approved for the treatment of infections or coinfections of these flaviviruses. Here, we found that zafirlukast, a pregnancy-safe leukotriene receptor antagonist, exhibited potent antiviral activity against infections of ZIKV strains from different lineages in different cell lines, as well as against infections of DENV-2 and YFV 17D. Mechanistic studies demonstrated that zafirlukast directly and irreversibly inactivated these flaviviruses by disrupting the integrity of the virions, leading to the loss of viral infectivity, hence inhibiting the entry step of virus infection. Considering its efficacy against flaviviruses, its safety for pregnant women, and its neuroprotective effect, zafirlukast is a promising candidate for prophylaxis and treatment of infections or coinfections of ZIKV, DENV, and YFV, even in pregnant women.
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Affiliation(s)
- Yongkang Chen
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Yuan Li
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Lu Lu
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Peng Zou
- Shanghai Public Health Clinical Center, Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Fudan University, Shanghai, China
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5
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Harish V, Colón-González FJ, Moreira FRR, Gibb R, Kraemer MUG, Davis M, Reiner RC, Pigott DM, Perkins TA, Weiss DJ, Bogoch II, Vazquez-Prokopec G, Saide PM, Barbosa GL, Sabino EC, Khan K, Faria NR, Hay SI, Correa-Morales F, Chiaravalloti-Neto F, Brady OJ. Human movement and environmental barriers shape the emergence of dengue. Nat Commun 2024; 15:4205. [PMID: 38806460 PMCID: PMC11133396 DOI: 10.1038/s41467-024-48465-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 04/29/2024] [Indexed: 05/30/2024] Open
Abstract
Understanding how emerging infectious diseases spread within and between countries is essential to contain future pandemics. Spread to new areas requires connectivity between one or more sources and a suitable local environment, but how these two factors interact at different stages of disease emergence remains largely unknown. Further, no analytical framework exists to examine their roles. Here we develop a dynamic modelling approach for infectious diseases that explicitly models both connectivity via human movement and environmental suitability interactions. We apply it to better understand recently observed (1995-2019) patterns as well as predict past unobserved (1983-2000) and future (2020-2039) spread of dengue in Mexico and Brazil. We find that these models can accurately reconstruct long-term spread pathways, determine historical origins, and identify specific routes of invasion. We find early dengue invasion is more heavily influenced by environmental factors, resulting in patchy non-contiguous spread, while short and long-distance connectivity becomes more important in later stages. Our results have immediate practical applications for forecasting and containing the spread of dengue and emergence of new serotypes. Given current and future trends in human mobility, climate, and zoonotic spillover, understanding the interplay between connectivity and environmental suitability will be increasingly necessary to contain emerging and re-emerging pathogens.
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Affiliation(s)
- Vinyas Harish
- Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- Vector Institute for Artificial Intelligence, Toronto, ON, Canada
| | - Felipe J Colón-González
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
- Centre on Climate Change and Planetary Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Filipe R R Moreira
- Medical Research Council Centre for Global Infectious Disease Analysis, Abdul Latif Jameel Institute for Disease and Emergency Analytics and Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, UK
- Departamento de Genética, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Rory Gibb
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
- Centre on Climate Change and Planetary Health, London School of Hygiene & Tropical Medicine, London, UK
- Department of Genetics, Evolution and Environment, University College London, London, UK
| | | | | | - Robert C Reiner
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - David M Pigott
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - T Alex Perkins
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA
- Eck Institute for Global Health, University of Notre Dame, Notre Dame, IN, USA
| | - Daniel J Weiss
- Geospatial Health and Development, Telethon Kids Institute, Nedlands, WA, Australia
- Faculty of Health Sciences, Curtin University, Perth, WA, Australia
| | - Isaac I Bogoch
- Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Divisions of General Internal Medicine and Infectious Diseases, Toronto General Hospital, University Health Network, Toronto, ON, Canada
| | | | | | - Gerson L Barbosa
- Pasteur Institute, State Secretary of Health of São Paulo, São Paulo, SP, Brazil
| | - Ester C Sabino
- Institute of Tropical Medicine, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Kamran Khan
- Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
- BlueDot, Toronto, ON, Canada
- Division of Infectious Diseases, St. Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
- Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, ON, Canada
| | - Nuno R Faria
- Departamento de Genética, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
- Institute of Tropical Medicine, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
| | - Simon I Hay
- Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA
- Department of Health Metrics Sciences, School of Medicine, University of Washington, Seattle, WA, USA
| | - Fabián Correa-Morales
- Centro Nacional de Programas Preventivos y Control de Enfermedades (CENAPRECE) Secretaria de Salud Mexico, Ciudad de Mexico, Mexico
| | | | - Oliver J Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK.
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
- Centre on Climate Change and Planetary Health, London School of Hygiene & Tropical Medicine, London, UK.
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Zhu X, Wang S, Li Y, Cao Y, Su X, Zhao X. Epidemiological Characterization of Dengue Fever - Yunnan Province, China, 2010-2021. China CDC Wkly 2024; 6:457-462. [PMID: 38846359 PMCID: PMC11150168 DOI: 10.46234/ccdcw2024.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 05/09/2024] [Indexed: 06/09/2024] Open
Abstract
Objective The goal of this study is to analyze the epidemiological patterns of dengue fever across different districts and counties in Yunnan Province from 2010 to 2021. Methods In this study, we employed joinpoint regression analysis, spatial autocorrelation analysis, and space-time scan analysis to illustrate the spatio-temporal propagation and demographic influence of dengue fever, using both graphical and tabular presentations to clearly demonstrate the findings. Results Yunnan Province reported 14,098 cases of dengue fever during the period from 2010 to 2021. Of these, 11,513 cases were caused by local transmission, 2,566 were imported internationally, and 19 were inter-provincial imports. Seasonal trends emerged, revealing a surge in incidences during the summer and autumn months. The sex ratio of male to female cases was 1:0.88, with a significant majority of 82.00% of cases involving individuals belonging to the age group of 15-60. Commercial service workers constituted the most impacted occupational group, forming 20.96% of total cases. A spatio-temporal scan identified significant clustering of dengue fever cases across space and time, with the most pronounced cluster observed in southern Yunnan, primarily between 2015 and 2019. Conclusions Dengue fever in Yunnan Province manifests as biennial outbreaks, underscoring the necessity for increased surveillance, particularly in counties bordering other regions.
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Affiliation(s)
- Xiaoxiang Zhu
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Songwang Wang
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yanfei Li
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yu Cao
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xuemei Su
- National Key Laboratory of Intelligent Tracking and Forecasting for Infectious Diseases, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaotao Zhao
- Yunnan Institute of Parasitic Diseases, Pu’er City, Yunnan Province, China
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Pedreañez A, Carrero Y, Vargas R, Hernández-Fonseca JP, Mosquera JA. Role of angiotensin II in cellular entry and replication of dengue virus. Arch Virol 2024; 169:121. [PMID: 38753119 DOI: 10.1007/s00705-024-06040-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 02/19/2024] [Indexed: 05/21/2024]
Abstract
Previous studies have demonstrated the relevance of several soluble molecules in the pathogenesis of dengue. In this regard, a possible role for angiotensin II (Ang II) in the pathophysiology of dengue has been suggested by the observation of a blockade of Ang II in patients with dengue, increased expression of molecules related to Ang II production in the plasma of dengue patients, increased expression of circulating cytokines and soluble molecules related to the action of Ang II, and an apparent relationship between DENV, Ang II effects, and miRNAs. In addition, in ex vivo experiments, the blockade of Ang II AT1 receptor and ACE-1 (angiotensin converting enzyme 1), both of which are involved in Ang II production and its function, inhibits infection of macrophages by DENV, suggesting a role of Ang II in viral entry or in intracellular viral replication of the virus. Here, we discuss the possible mechanisms of Ang II in the entry and replication of DENV. Ang II has the functions of increasing the expression of DENV entry receptors, creation of clathrin-coated vesicles, and increasing phagocytosis, all of which are involved in DENV entry. This hormone also modulates the expression of the Rab5 and Rab7 proteins, which are important in the endosomal processing of DENV during viral replication. This review summarizes the data related to the possible involvement of Ang II in the entry of DENV into cells and its replication.
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Affiliation(s)
- Adriana Pedreañez
- Cátedra de Inmunología, Escuela de Bioanálisis, Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Yenddy Carrero
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Renata Vargas
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
| | - Juan P Hernández-Fonseca
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela
- Servicio de Microscopia Electrónica del Centro Nacional de Biotecnología (CNB- CSIC), Madrid, España
| | - Jesús Alberto Mosquera
- Instituto de Investigaciones Clínicas "Dr. Américo Negrette", Facultad de Medicina, Universidad del Zulia, Maracaibo, Venezuela.
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Chen Y, Xu Y, Wang L, Liang Y, Li N, Lourenço J, Yang Y, Lin Q, Wang L, Zhao H, Cazelles B, Song H, Liu Z, Wang Z, Brady OJ, Cauchemez S, Tian H. Indian Ocean temperature anomalies predict long-term global dengue trends. Science 2024; 384:639-646. [PMID: 38723095 DOI: 10.1126/science.adj4427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 04/09/2024] [Indexed: 05/31/2024]
Abstract
Despite identifying El Niño events as a factor in dengue dynamics, predicting the oscillation of global dengue epidemics remains challenging. Here, we investigate climate indicators and worldwide dengue incidence from 1990 to 2019 using climate-driven mechanistic models. We identify a distinct indicator, the Indian Ocean basin-wide (IOBW) index, as representing the regional average of sea surface temperature anomalies in the tropical Indian Ocean. IOBW is closely associated with dengue epidemics for both the Northern and Southern hemispheres. The ability of IOBW to predict dengue incidence likely arises as a result of its effect on local temperature anomalies through teleconnections. These findings indicate that the IOBW index can potentially enhance the lead time for dengue forecasts, leading to better-planned and more impactful outbreak responses.
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Affiliation(s)
- Yuyang Chen
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
- Yangtze Eco-Environment Engineering Research Center, China Three Gorges Corporation, Wuhan, China
| | - Yiting Xu
- School of National Safety and Emergency Management, Beijing Normal University, Zhuhai, China
| | - Lin Wang
- Department of Genetics, University of Cambridge, Cambridge, UK
| | - Yilin Liang
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
| | - Naizhe Li
- School of National Safety and Emergency Management, Beijing Normal University, Zhuhai, China
| | - José Lourenço
- Católica Biomedical Research Center, Católica Medical School, Universidade Católica Portuguesa, Lisbon, Portugal
| | - Yun Yang
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
| | - Qiushi Lin
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
| | - Ligui Wang
- Center of Disease Control and Prevention, PLA, Beijing, China
| | - He Zhao
- CMA Earth System Modeling and Prediction Centre, China Meteorological Administration, Beijing, China
| | - Bernard Cazelles
- Institut de Biologie de l'École Normale Supérieure UMR 8197, Eco-Evolutionary Mathematics, École Normale Supérieure, Paris, France
- Unité Mixte Internationnale 209, Mathematical and Computational Modeling of Complex Systems, Sorbonne Université, Paris, France
| | - Hongbin Song
- Center of Disease Control and Prevention, PLA, Beijing, China
| | - Ziyan Liu
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
| | - Zengmiao Wang
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
| | - Oliver J Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology and Dynamics, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Simon Cauchemez
- Mathematical Modelling of Infectious Diseases Unit, Institut Pasteur, Université Paris Cité, UMR2000, CNRS, Paris, France
| | - Huaiyu Tian
- State Key Laboratory of Remote Sensing Science, Center for Global Change and Public Health, Beijing Normal University, Beijing, China
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Martí MM, Castanha PMS, Barratt-Boyes SM. The Dynamic Relationship between Dengue Virus and the Human Cutaneous Innate Immune Response. Viruses 2024; 16:727. [PMID: 38793609 PMCID: PMC11125669 DOI: 10.3390/v16050727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/26/2024] [Accepted: 05/02/2024] [Indexed: 05/26/2024] Open
Abstract
Dengue virus (DENV) is a continuing global threat that puts half of the world's population at risk for infection. This mosquito-transmitted virus is endemic in over 100 countries. When a mosquito takes a bloodmeal, virus is deposited into the epidermal and dermal layers of human skin, infecting a variety of permissive cells, including keratinocytes, Langerhans cells, macrophages, dermal dendritic cells, fibroblasts, and mast cells. In response to infection, the skin deploys an array of defense mechanisms to inhibit viral replication and prevent dissemination. Antimicrobial peptides, pattern recognition receptors, and cytokines induce a signaling cascade to increase transcription and translation of pro-inflammatory and antiviral genes. Paradoxically, this inflammatory environment recruits skin-resident mononuclear cells that become infected and migrate out of the skin, spreading virus throughout the host. The details of the viral-host interactions in the cutaneous microenvironment remain unclear, partly due to the limited body of research focusing on DENV in human skin. This review will summarize the functional role of human skin, the cutaneous innate immune response to DENV, the contribution of the arthropod vector, and the models used to study DENV interactions in the cutaneous environment.
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Affiliation(s)
- Michelle M. Martí
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, PA 15260, USA; (M.M.M.); (P.M.S.C.)
| | - Priscila M. S. Castanha
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, PA 15260, USA; (M.M.M.); (P.M.S.C.)
- Faculdade de Ciệncias Médicas, Universidade de Pernambuco, Recife 52171-011, Brazil
| | - Simon M. Barratt-Boyes
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, PA 15260, USA; (M.M.M.); (P.M.S.C.)
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10
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Modak A, Mishra SR, Awasthi M, Aravind A, Singh S, Sreekumar E. Fingolimod (FTY720), an FDA-approved sphingosine 1-phosphate (S1P) receptor agonist, restores endothelial hyperpermeability in cellular and animal models of dengue virus serotype 2 infection. IUBMB Life 2024; 76:267-285. [PMID: 38031996 DOI: 10.1002/iub.2795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 10/24/2023] [Indexed: 12/01/2023]
Abstract
Extensive vascular leakage and shock is a major cause of dengue-associated mortality. At present, there are no specific treatments available. Sphingolipid pathway is a key player in the endothelial barrier integrity; and is mediated through the five sphingosine-1-phosphate receptors (S1PR1-S1PR5). Signaling through S1PR2 promotes barrier disruption; and in Dengue virus (DENV)-infection, there is overexpression of this receptor. Fingolimod (FTY720) is a specific agonist that targets the remaining barrier-protective S1P receptors, without targeting S1PR2. In the present study, we explored whether FTY720 treatment can alleviate DENV-induced endothelial hyperpermeability. In functional assays, in both in vitro systems and in AG129 animal models, FTY720 treatment was found effective. Upon treatment, there was complete restoration of the monolayer integrity in DENV serotype 2-infected human microvascular endothelial cells (HMEC-1). At the molecular level, the treatment reversed activation of the S1P pathway. It significantly reduced the phosphorylation of the key molecules such as PTEN, RhoA, and VE-Cadherin; and also, the expression levels of S1PR2. In DENV2-infected AG129 mice treated with FTY720, there was significant improvement in weight gain, in overall clinical symptoms, and in survival. Whereas 100% of the DENV2-infected, untreated animals died by day-10 post-infection, 70% of the FTY720-treated animals were alive; and at the end of the 15-day post-infection observation period, 30% of them were still surviving. There was a significant reduction in the Evan's-blue dye permeability in the organs of FTY720-treated, DENV-2 infected animals; and also improvement in the hemogram, with complete restoration of thrombocytopenia and hepatic function. Our results show that the FDA-approved molecule Fingolimod (FTY720) is a promising therapeutic intervention in severe dengue.
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Affiliation(s)
- Ayan Modak
- Molecular Virology Laboratory, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, India
- Regional Centre for Biotechnology (RCB), NCR Biotech Science Cluster, Faridabad, Haryana (NCR Delhi), India
| | - Srishti Rajkumar Mishra
- Molecular Virology Laboratory, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, India
- Regional Centre for Biotechnology (RCB), NCR Biotech Science Cluster, Faridabad, Haryana (NCR Delhi), India
| | - Mansi Awasthi
- Molecular Virology Laboratory, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, India
- Regional Centre for Biotechnology (RCB), NCR Biotech Science Cluster, Faridabad, Haryana (NCR Delhi), India
| | - Arya Aravind
- Animal Research Facility, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, Kerala, India
| | - Sneha Singh
- Molecular Virology Laboratory, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, India
| | - Easwaran Sreekumar
- Molecular Virology Laboratory, Rajiv Gandhi Centre for Biotechnology (RGCB), Thiruvananthapuram, India
- Molecular Bioassay Laboratory, Institute of Advanced Virology (IAV), Thiruvananthapuram, Kerala, India
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11
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Mpingabo PI, Ylade M, Aogo RA, Crisostomo MV, Thiono DJ, Daag JV, Agrupis KA, Escoto AC, Raimundi-Rodriguez GL, Odio CD, Fernandez MA, White L, de Silva AM, Deen J, Katzelnick LC. Envelope-dimer epitope-like broadly protective antibodies against dengue in children following natural infection and vaccination. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2024:2024.04.30.24306574. [PMID: 38746253 PMCID: PMC11092691 DOI: 10.1101/2024.04.30.24306574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Cross-reactive antibodies (Abs) to epitopes that span envelope proteins on the virion surface are hypothesized to protect against dengue. Here, we measured Abs targeting the quaternary envelope dimer epitope (EDE) as well as neutralizing and binding Abs and evaluate their association with dengue virus (DENV) infection, vaccine response, and disease outcome in dengue vaccinated and unvaccinated children (n=252) within a longitudinal cohort in Cebu, Philippines (n=2,996). Abs targeting EDE were prevalent and strongly associated with broad neutralization of DENV1-4 in those with baseline multitypic immunity. Subsequent natural infection and vaccination boosted EDE-like, neutralizing, and binding Abs. EDE-like Abs were associated with reduced dengue risk and mediated the protective effect of binding and neutralizing Abs on symptomatic and severe dengue. Thus, Abs targeting quaternary epitopes help explain broad cross protection in those with multiple prior DENV exposures, making them useful for evaluation and development of future vaccines and therapeutics.
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12
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Vogels CBF, Hill V, Breban MI, Chaguza C, Paul LM, Sodeinde A, Taylor-Salmon E, Ott IM, Petrone ME, Dijk D, Jonges M, Welkers MRA, Locksmith T, Dong Y, Tarigopula N, Tekin O, Schmedes S, Bunch S, Cano N, Jaber R, Panzera C, Stryker I, Vergara J, Zimler R, Kopp E, Heberlein L, Herzog KS, Fauver JR, Morrison AM, Michael SF, Grubaugh ND. DengueSeq: a pan-serotype whole genome amplicon sequencing protocol for dengue virus. BMC Genomics 2024; 25:433. [PMID: 38693476 PMCID: PMC11062901 DOI: 10.1186/s12864-024-10350-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 04/25/2024] [Indexed: 05/03/2024] Open
Abstract
BACKGROUND The increasing burden of dengue virus on public health due to more explosive and frequent outbreaks highlights the need for improved surveillance and control. Genomic surveillance of dengue virus not only provides important insights into the emergence and spread of genetically diverse serotypes and genotypes, but it is also critical to monitor the effectiveness of newly implemented control strategies. Here, we present DengueSeq, an amplicon sequencing protocol, which enables whole-genome sequencing of all four dengue virus serotypes. RESULTS We developed primer schemes for the four dengue virus serotypes, which can be combined into a pan-serotype approach. We validated both approaches using genetically diverse virus stocks and clinical specimens that contained a range of virus copies. High genome coverage (>95%) was achieved for all genotypes, except DENV2 (genotype VI) and DENV 4 (genotype IV) sylvatics, with similar performance of the serotype-specific and pan-serotype approaches. The limit of detection to reach 70% coverage was 10-100 RNA copies/μL for all four serotypes, which is similar to other commonly used primer schemes. DengueSeq facilitates the sequencing of samples without known serotypes, allows the detection of multiple serotypes in the same sample, and can be used with a variety of library prep kits and sequencing instruments. CONCLUSIONS DengueSeq was systematically evaluated with virus stocks and clinical specimens spanning the genetic diversity within each of the four dengue virus serotypes. The primer schemes can be plugged into existing amplicon sequencing workflows to facilitate the global need for expanded dengue virus genomic surveillance.
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Affiliation(s)
- Chantal B F Vogels
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA.
- Yale Institute for Global Health, Yale University, New Haven, Connecticut, USA.
| | - Verity Hill
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Mallery I Breban
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Chrispin Chaguza
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
- Yale Institute for Global Health, Yale University, New Haven, Connecticut, USA
| | - Lauren M Paul
- Department of Biological Sciences, College of Arts and Sciences, Florida Gulf Coast University, Fort Myers, Florida, USA
| | - Afeez Sodeinde
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Emma Taylor-Salmon
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
- Department of Pediatrics, Yale School of Medicine, New Haven, Connecticut, USA
| | - Isabel M Ott
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
| | - Mary E Petrone
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA
- Sydney Institute for Infectious Diseases, School of Medical Sciences, University of Sydney, Sydney, NSW, Australia
| | - Dennis Dijk
- Department of Medical Microbiology & Infection Prevention, Amsterdam UMC Location AMC, Amsterdam, The Netherlands
| | - Marcel Jonges
- Department of Medical Microbiology & Infection Prevention, Amsterdam UMC Location AMC, Amsterdam, The Netherlands
| | - Matthijs R A Welkers
- Department of Medical Microbiology & Infection Prevention, Amsterdam UMC Location AMC, Amsterdam, The Netherlands
- Department of Infectious Diseases, Public Health Service of Amsterdam, Amsterdam, The Netherlands
| | - Timothy Locksmith
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Yibo Dong
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Jacksonville, FL, USA
| | - Namratha Tarigopula
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Jacksonville, FL, USA
| | - Omer Tekin
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Jacksonville, FL, USA
| | - Sarah Schmedes
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Jacksonville, FL, USA
| | - Sylvia Bunch
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Natalia Cano
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Rayah Jaber
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Charles Panzera
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Ian Stryker
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Julieta Vergara
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Rebecca Zimler
- Bureau of Epidemiology, Division of Disease Control and Health Protection, Florida Department of Health, Tallahassee, FL, USA
| | - Edgar Kopp
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Lea Heberlein
- Bureau of Public Health Laboratories, Division of Disease Control and Health Protection, Florida Department of Health, Tampa, FL, USA
| | - Kaylee S Herzog
- Department of Epidemiology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Joseph R Fauver
- Department of Epidemiology, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Andrea M Morrison
- Bureau of Epidemiology, Division of Disease Control and Health Protection, Florida Department of Health, Tallahassee, FL, USA
| | - Scott F Michael
- Department of Biological Sciences, College of Arts and Sciences, Florida Gulf Coast University, Fort Myers, Florida, USA
| | - Nathan D Grubaugh
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, New Haven, Connecticut, USA.
- Yale Institute for Global Health, Yale University, New Haven, Connecticut, USA.
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, Connecticut, USA.
- Public Health Modeling Unit, Yale School of Public Health, New Haven, Connecticut, USA.
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13
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Joshi G, Das A, Verma G, Guchhait P. Viral infection and host immune response in diabetes. IUBMB Life 2024; 76:242-266. [PMID: 38063433 DOI: 10.1002/iub.2794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 11/05/2023] [Indexed: 04/24/2024]
Abstract
Diabetes, a chronic metabolic disorder disrupting blood sugar regulation, has emerged as a prominent silent pandemic. Uncontrolled diabetes predisposes an individual to develop fatal complications like cardiovascular disorders, kidney damage, and neuropathies and aggravates the severity of treatable infections. Escalating cases of Type 1 and Type 2 diabetes correlate with a global upswing in diabetes-linked mortality. As a growing global concern with limited preventive interventions, diabetes necessitates extensive research to mitigate its healthcare burden and assist ailing patients. An altered immune system exacerbated by chronic hyperinflammation heightens the susceptibility of diabetic individuals to microbial infections, including notable viruses like SARS-CoV-2, dengue, and influenza. Given such a scenario, we scrutinized the literature and compiled molecular pathways and signaling cascades related to immune compartments in diabetics that escalate the severity associated with the above-mentioned viral infections in them as compared to healthy individuals. The pathogenesis of these viral infections that trigger diabetes compromises both innate and adaptive immune functions and pre-existing diabetes also leads to heightened disease severity. Lastly, this review succinctly outlines available treatments for diabetics, which may hold promise as preventive or supportive measures to effectively combat these viral infections in the former.
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Affiliation(s)
- Garima Joshi
- Regional Centre for Biotechnology, National Capital Region Biotech Science Cluster, Faridabad, India
| | - Anushka Das
- Regional Centre for Biotechnology, National Capital Region Biotech Science Cluster, Faridabad, India
| | - Garima Verma
- Regional Centre for Biotechnology, National Capital Region Biotech Science Cluster, Faridabad, India
| | - Prasenjit Guchhait
- Regional Centre for Biotechnology, National Capital Region Biotech Science Cluster, Faridabad, India
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14
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Chakraborty S, Zigmond E, Shah S, Sylla M, Akorli J, Otoo S, Rose NH, McBride CS, Armbruster PA, Benoit JB. Thermal tolerance of mosquito eggs is associated with urban adaptation and human interactions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.22.586322. [PMID: 38585904 PMCID: PMC10996485 DOI: 10.1101/2024.03.22.586322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Climate change is expected to profoundly affect mosquito distributions and their ability to serve as vectors for disease, specifically with the anticipated increase in heat waves. The rising temperature and frequent heat waves can accelerate mosquito life cycles, facilitating higher disease transmission. Conversely, higher temperatures could increase mosquito mortality as a negative consequence. Warmer temperatures are associated with increased human density, suggesting a need for anthropophilic mosquitoes to adapt to be more hardy to heat stress. Mosquito eggs provide an opportunity to study the biological impact of climate warming as this stage is stationary and must tolerate temperatures at the site of female oviposition. As such, egg thermotolerance is critical for survival in a specific habitat. In nature, Aedes mosquitoes exhibit different behavioral phenotypes, where specific populations prefer depositing eggs in tree holes and prefer feeding non-human vertebrates. In contrast, others, particularly human-biting specialists, favor laying eggs in artificial containers near human dwellings. This study examined the thermotolerance of eggs, along with adult stages, for Aedes aegypti and Ae. albopictus lineages associated with known ancestry and shifts in their relationship with humans. Mosquitoes collected from areas with higher human population density, displaying increased human preference, and having a human-associated ancestry profile have increased egg viability following high-temperature stress. Unlike eggs, thermal tolerance among adults showed no significant correlation based on the area of collection or human-associated ancestry. This study highlights that the egg stage is likely critical to mosquito survival when associated with humans and needs to be accounted when predicting future mosquito distribution.
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Affiliation(s)
- Souvik Chakraborty
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221
| | - Emily Zigmond
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221
| | - Sher Shah
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221
| | - Massamba Sylla
- Laboratory Vectors & Parasites, Department of Livestock Sciences and Techniques, Sine Saloum University El Hadji Ibrahima NIASS (SSUEIN) Kaffrine Campus
| | - Jewelna Akorli
- Department of Parasitology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Sampson Otoo
- Department of Parasitology, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Noah H Rose
- Department of Ecology & Evolutionary Biology, Princeton University, Princeton, NJ 08544
- Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544
- Department of Ecology, Behavior, and Evolution, University of California San Diego, La Jolla, CA 92093
| | - Carolyn S McBride
- Department of Ecology & Evolutionary Biology, Princeton University, Princeton, NJ 08544
- Princeton Neuroscience Institute, Princeton University, Princeton, NJ 08544
| | | | - Joshua B Benoit
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, 45221
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Ngadni MA, Chong SL, Hazni H, Asib N, Ishak IH, Mohmad Misnan N, Supratman U, Awang K. Limonoids from the fruits of Chisocheton erythrocarpus and their mosquito larvicidal activities. PHYTOCHEMISTRY 2024; 222:114092. [PMID: 38604323 DOI: 10.1016/j.phytochem.2024.114092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/13/2024]
Abstract
Phytochemical study of the fruits of Chisocheton erythrocarpus (Hiern) allowed the identification of eight undescribed limonoids, namely erythrocarpines O - V (1-6, 7a and 7b), along with seven known compounds. The structures of these compounds were elucidated based on spectroscopic and HRMS data, along with electronic circular dichroism to configure the absolute configuration. Erythrocarpines O and P are γ-hydroxybutenolide analogs of mexicanolide-type limonoids while erythrocarpine Q - V are phragmalin-type limonoids possessing a 1,29-oxymethylene bridge with either benzoyl or cinnamoyl moiety in their structures. Mosquito larvicidal activity revealed that crude DCM extract of C. erythrocarpus possessed a good larvicidal effect against Aedes aegypti larvae in 48 h (LC50 = 153.0 ppm). Subsequent larvicidal activity of isolated compounds indicated that erythrocarpine G (10) and 14-deoxyxyloccensin K (11) were responsible for the enhanced larvicidal effect of the extract, reporting LC50 values of 18.55 ppm and 41.16 ppm, respectively. Moreover, residual activity testing of the crude DCM extract revealed that the duration of its larvicidal effects is up to 14 days, where it maintained a 98 % larval mortality throughout the test period, under laboratory conditions.
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Affiliation(s)
- Muhammad Afiq Ngadni
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Soon-Lim Chong
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Hazrina Hazni
- Centre for Natural Products & Drugs Research, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Norhayu Asib
- Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, Selangor, Malaysia
| | - Intan Haslina Ishak
- Insecticide Resistance Research Group, School of Biological Sciences, Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Norazlan Mohmad Misnan
- Herbal Medicine Research Centre, Institute for Medical Research, National Institutes of Health, 40170, Shah Alam, Selangor Darul Ehsan, Malaysia
| | - Unang Supratman
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Jatinangor, 45363, Indonesia
| | - Khalijah Awang
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
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Zohra T, Din M, Ikram A, Bashir A, Jahangir H, Baloch IS, Irshad S, Waris A, Salman M, Iqtadar S, Ayaz M. Demographic and clinical features of dengue fever infection in Pakistan: a cross-sectional epidemiological study. Trop Dis Travel Med Vaccines 2024; 10:11. [PMID: 38581059 PMCID: PMC10998367 DOI: 10.1186/s40794-024-00221-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 03/26/2024] [Indexed: 04/07/2024] Open
Abstract
BACKGROUND Dengue fever caused by dengue virus is a tropical disease and is among the deadliest vector-borne diseases. The humid and hot summers of Pakistan support the probation of the vectors responsible for the transmission of viral and other parasitic diseases. METHODOLOGY A retrospective study, from 2012- 2019, of dengue infected individuals from the Punjab province of Pakistan was carried out to analyze epidemiology, clinical and laboratory findings of subjects with dengue virus infection. Data was derived from National Institute of Health (NIH) followed by Dengue control program of Pakistan, covering the incidence rate in 36 districts of Punjab and Islamabad Capital Territory (ICT) respectively. Patients data including the presence of dengue specific antigen or/and antibodies such as NS1 and IgG/IgM were observed. The study also included the analysis of demographic data, geographic data, and the month-wise distribution of dengue cases to examine seasonal trends. RESULTS We analyzed 25,682 dengue infected individuals. The statistical analysis revealed a significant association between genders in which male population was more affected by dengue than females. It was also noted that the middle age group was the most affected age group while the highest number of cases were reported in October. Rawalpindi and Lahore were the most affected cities in Punjab province while Islamabad represented the highest number of cases during the recent outbreak in 2019. The IgM and IgG antibodies were highly prevalent among the infected patients. CONCLUSION Dengue is endemic in Pakistan, circulating throughout the year. Highest number of cases were observed in the month of October, September and November respectively. Association between climate change and vector-borne diseases need to be investigated in Pakistan as they significantly influence the timing and intensity of dengue and other disease outbreaks. Further exploration of hematological parameters is required to better diagnose and treat the disease. For the effective control of dengue outbreaks, awareness campaigns on sewage management and vector control along with social factors are strongly recommended for better control and eradication of the disease.
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Affiliation(s)
- Tanzeel Zohra
- National Institutes of Health, Islamabad, 45500, Pakistan.
| | - Misbahud Din
- Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Aamer Ikram
- National Institutes of Health, Islamabad, 45500, Pakistan
| | - Adnan Bashir
- Health Information Systems Program, Islamabad, Pakistan
| | - Haroon Jahangir
- Primary and Secondary Healthcare Department, Government of Punjab, Lahore, Pakistan
| | | | - Sundas Irshad
- Primary and Secondary Healthcare Department, Government of Punjab, Lahore, Pakistan
| | - Abdul Waris
- Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | | | - Somia Iqtadar
- Dengue Expert Advisory Group Punjab, King Edward Medical University, Lahore, 54000, Pakistan
| | - Muhammad Ayaz
- Department of Pharmacy, University of Malakand Khyber, Chakdara, 18800, Pakistan.
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17
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Durrance-Bagale A, Hoe N, Lai J, Liew JWK, Clapham H, Howard N. Dengue vector control in high-income, city settings: A scoping review of approaches and methods. PLoS Negl Trop Dis 2024; 18:e0012081. [PMID: 38630673 PMCID: PMC11023197 DOI: 10.1371/journal.pntd.0012081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 03/18/2024] [Indexed: 04/19/2024] Open
Abstract
BACKGROUND Dengue virus (DENV) is endemic to many parts of the world and has serious health and socioeconomic effects even in high-income countries, especially with rapid changes in the climate globally. We explored the literature on dengue vector control methods used in high-income, city settings and associations with dengue incidence, dengue prevalence, or mosquito vector densities. METHODS Studies of any design or year were included if they reported effects on human DENV infection or Aedes vector indices of dengue-specific vector control interventions in high-income, city settings. RESULTS Of 24 eligible sources, most reported research in the United States (n = 8) or Australia (n = 5). Biocontrol (n = 12) and chemical control (n = 13) were the most frequently discussed vector control methods. Only 6 sources reported data on the effectiveness of a given method in reducing human DENV incidence or prevalence, 2 described effects of larval and adult control on Aedes DENV positivity, 20 reported effectiveness in reducing vector density, using insecticide, larvicide, source reduction, auto-dissemination of pyriproxyfen and Wolbachia, and only 1 described effects on human-vector contact. CONCLUSIONS As most studies reported reductions in vector densities, rather than any effects on human DENV incidence or prevalence, we can draw no clear conclusions on which interventions might be most effective in reducing dengue in high-income, city areas. More research is needed linking evidence on the effects of different DENV vector control methods with dengue incidence/prevalence or mosquito vector densities in high-income, city settings as this is likely to differ from low-income settings. This is a significant evidence gap as climate changes increase the global reach of DENV. The importance of community involvement was clear in several studies, although it is impossible to tease out the relative contributions of this from other control methods used.
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Affiliation(s)
- Anna Durrance-Bagale
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
- London School of Hygiene & Tropical Medicine, Department of Global Health & Development, London, United Kingdom
| | - Nirel Hoe
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
| | - Jane Lai
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
| | | | - Hannah Clapham
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
| | - Natasha Howard
- Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore
- London School of Hygiene & Tropical Medicine, Department of Global Health & Development, London, United Kingdom
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18
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Diaz A. [Dengue in Argentina: confirmation of our worst suspicions]. REVISTA DE LA FACULTAD DE CIENCIAS MÉDICAS 2024; 81:1-4. [PMID: 38537087 PMCID: PMC11110668 DOI: 10.31053/1853.0605.v81.n1.44575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 03/20/2024] [Indexed: 04/05/2024] Open
Affiliation(s)
- Adrián Diaz
- Universidad Nacional de Córdoba. Facultad de Ciencias Médicas Instituto de Virología "Dr. J. M. Vanella"..
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19
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Kuo CY, Yang WW, Su ECY. Improving dengue fever predictions in Taiwan based on feature selection and random forests. BMC Infect Dis 2024; 24:334. [PMID: 38509486 PMCID: PMC10953060 DOI: 10.1186/s12879-024-09220-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 03/12/2024] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND Dengue fever is a well-studied vector-borne disease in tropical and subtropical areas of the world. Several methods for predicting the occurrence of dengue fever in Taiwan have been proposed. However, to the best of our knowledge, no study has investigated the relationship between air quality indices (AQIs) and dengue fever in Taiwan. RESULTS This study aimed to develop a dengue fever prediction model in which meteorological factors, a vector index, and AQIs were incorporated into different machine learning algorithms. A total of 805 meteorological records from 2013 to 2015 were collected from government open-source data after preprocessing. In addition to well-known dengue-related factors, we investigated the effects of novel variables, including particulate matter with an aerodynamic diameter < 10 µm (PM10), PM2.5, and an ultraviolet index, for predicting dengue fever occurrence. The collected dataset was randomly divided into an 80% training set and a 20% test set. The experimental results showed that the random forests achieved an area under the receiver operating characteristic curve of 0.9547 for the test set, which was the best compared with the other machine learning algorithms. In addition, the temperature was the most important factor in our variable importance analysis, and it showed a positive effect on dengue fever at < 30 °C but had less of an effect at > 30 °C. The AQIs were not as important as temperature, but one was selected in the process of filtering the variables and showed a certain influence on the final results. CONCLUSIONS Our study is the first to demonstrate that AQI negatively affects dengue fever occurrence in Taiwan. The proposed prediction model can be used as an early warning system for public health to prevent dengue fever outbreaks.
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Affiliation(s)
- Chao-Yang Kuo
- Smart Healthcare Interdisciplinary College, National Taipei University of Nursing and Health Sciences, No.365, Mingde Road, Beitou District, Taipei City, 112303, Taiwan
- Graduate Institute of Biomedical Informatics, College of Medical Science and Technology, Taipei Medical University, No.301, Yuantong Road, Zhonghe District, New Taipei City, 23564, Taiwan
| | - Wei-Wen Yang
- Graduate Institute of Biomedical Informatics, College of Medical Science and Technology, Taipei Medical University, No.301, Yuantong Road, Zhonghe District, New Taipei City, 23564, Taiwan
| | - Emily Chia-Yu Su
- Graduate Institute of Biomedical Informatics, College of Medical Science and Technology, Taipei Medical University, No.301, Yuantong Road, Zhonghe District, New Taipei City, 23564, Taiwan.
- Clinical Big Data Research Center, Taipei Medical University Hospital, No.252 Wuxing Street, Xinyi District, Taipei City, 110, Taiwan.
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20
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Sokhna S, Mérindol N, Presset M, Seck I, Girard MP, Ka S, Ndoye SF, Ba AL, Samb I, Berthoux L, Le Gall E, Desgagné-Penix I, Seck M. Potential of several triazene derivatives against DENGUE viruses. Bioorg Med Chem Lett 2024; 101:129646. [PMID: 38331225 DOI: 10.1016/j.bmcl.2024.129646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 01/23/2024] [Accepted: 02/01/2024] [Indexed: 02/10/2024]
Abstract
Dengue fever is an infectious disease caused by the dengue virus (DENV), an RNA Flavivirus transmitted by the mosquitoes Aedes aegypti and Aedes albopictus widespread in tropical, subtropical and also temperate regions. Symptoms range from a simple cold to a severe, life-threatening haemorrhagic fever. According to the WHO, it affects around 390 million people per year. No antiviral treatment for DENV is available, and the Dengvaxia vaccine is only intended for people over 9 years of age who have contracted dengue one time in the past, and shows serotype-specific effectiveness. There is therefore a crying need to discover new molecules with antiviral power against flaviviruses. The present study was carried out to evaluate the anti-DENV activities and cytotoxicity of triazenes obtained by diazocopulation. Some triazenes were highly cytotoxic (16, and 25) to hepatocarcinoma Huh7 cells, whereas others displayed strong anti-DENV potential. The antiviral activity ranged from EC50 = 7.82 µM to 48.12 µM in cellulo, with a selectivity index (CC50/EC50) greater than 9 for two of the compounds (10, and 20). In conclusion, these new triazenes could serve as a lead to develop and optimize drugs against DENV.
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Affiliation(s)
- Seynabou Sokhna
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal; UMR 7182, ICMPE, Institut de Chimie et des Matériaux Paris Est, Thiais, France; Equipe de recherche chimie organique et thérapeutique (ECOT) de l'Université Alioune Diop de Bambey. BP 30 Région de Diourbel, Sénégal.
| | - Natacha Mérindol
- Département de chimie, biochimie et physique, UQTR, Trois-Rivières, QC, Canada.
| | - Marc Presset
- UMR 7182, ICMPE, Institut de Chimie et des Matériaux Paris Est, Thiais, France.
| | - Insa Seck
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal; Laboratoire de Chimie de Coordination Organique (LCCO), Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal.
| | - Marie-Pierre Girard
- Département de chimie, biochimie et physique, UQTR, Trois-Rivières, QC, Canada; Département de biologie médicale, UQTR, Trois-Rivières, QC, Canada.
| | - Seydou Ka
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal; Département de chimie, biochimie et physique, UQTR, Trois-Rivières, QC, Canada.
| | - Samba Fama Ndoye
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal; Laboratoire de Chimie de Coordination Organique (LCCO), Département de Chimie, Faculté des Sciences et Techniques, Université Cheikh Anta Diop de Dakar, Dakar, Sénégal.
| | - Aïcha Lalla Ba
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal; Université Amadou Mahtar MBOW, BP 45927 Dakar Nafa VDN, Sénégal, Dakar-Fann, Sénégal.
| | - Issa Samb
- Equipe de recherche chimie organique et thérapeutique (ECOT) de l'Université Alioune Diop de Bambey. BP 30 Région de Diourbel, Sénégal.
| | - Lionel Berthoux
- Département de biologie médicale, UQTR, Trois-Rivières, QC, Canada.
| | - Erwan Le Gall
- UMR 7182, ICMPE, Institut de Chimie et des Matériaux Paris Est, Thiais, France.
| | | | - Matar Seck
- Laboratoire de Chimie Organique et Thérapeutique, Faculté de Médecine, de Pharmacie et d'Odontologie de l'Université Cheikh Anta Diop de Dakar, BP 5005 Dakar-Fann, Sénégal.
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21
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Hamed M. Knowledge, attitude, and practices toward dengue fever among the public: a cross-sectional study in the Western region of Saudi Arabia. Front Public Health 2024; 12:1327427. [PMID: 38510353 PMCID: PMC10951052 DOI: 10.3389/fpubh.2024.1327427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 02/19/2024] [Indexed: 03/22/2024] Open
Abstract
Background Dengue fever (DF) is a primary viral disease transmitted to humans by mosquitoes, imposing a significant economic and health burden in numerous regions globally. There is a lack of studies addressing the importance of health education regarding DF in Saudi Arabia. Therefore, this study aimed to assess predictors influencing knowledge, attitude, and practices of the Western region public in Saudi Arabia related to DF. Methods This cross-sectional study was conducted as an online self-administered questionnaire collected from July 2023 until August 2023, included 695 participants from the Western region residents aged ≥18 years. Data collected involved sociodemographics, participants' knowledge, attitude, and practices toward DF. We presented the descriptive data as mean ± standard deviations (SD) and medians [interquartile range (IQR)] for continuous variables, while categorical variables were presented as frequencies [percent (%)]. Results Good participants' knowledge and attitude toward DF were observed among participants [median score 21.0 (interquartile range 16.0-24.0)] out of 35 and [median score 4.00 (interquartile range 3.00-5.00)] out of 5, respectively. Limited practices toward DF were observed among participants [median score 3.0 (interquartile range 0.00-5.00)] out of 8. Participants' knowledge and attitude were not correlated. Participants' education level and employment status predicted participant's knowledge of DF. Participants' age, monthly income, employment status and marital status predicted participants' attitude toward DF. Participants' age, marital status, education levels and income predicted participants' practices toward DF. Conclusion Knowledge, attitude, and practices toward DF among adults in Saudi Arabia can be predicted by specific sociodemographic characteristics. Implementing interferences that focus on improving public practices toward DF is imperative.
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22
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Madera-Garcia V, Soto JR, Ellingson KD, Jacobs E, Walker KR, Ernst KC. Preferences and Demand for Mosquito Control among Dengue-Endemic Communities in Peñuelas, Puerto Rico: An Application of the Best-Worst Choice Model. Am J Trop Med Hyg 2024; 110:540-548. [PMID: 38266284 PMCID: PMC10919196 DOI: 10.4269/ajtmh.22-0528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 07/25/2023] [Indexed: 01/26/2024] Open
Abstract
Aedes aegypti is the primary vector of dengue virus and threatens 3.9 billion people living in many tropical and subtropical countries. Prevention and reduction of dengue and other Aedes-borne viruses, including Zika and chikungunya, requires control of mosquito populations. Community mobilization and input are essential components of vector control efforts. Many vector control campaigns do not engage communities prior to implementation, leading to program failure. Those that do often conduct basic knowledge, attitude, and practice surveys that are not designed to explicitly elicit preferences. Here, we applied a novel stated preference elicitation tool, best-worst choice, to understand preferences, willingness to participate, and willingness to pay for mosquito control in dengue-endemic communities of Peñuelas, Puerto Rico. Findings revealed that the community preferred mosquito control programs that are 1) applied at the neighborhood level, 2) implemented by the local government, and 3) focused specifically on reducing disease transmission (e.g., dengue) instead of mosquito nuisance. Programs targeting the reduction of disease transmission and higher educational level of participants increased willingness to participate. Participants were willing to pay an average of $72 annually to have a program targeting the reduction of diseases such as dengue. This study serves as a model to engage communities in the design of mosquito control programs and improve stakeholders' decision-making.
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Affiliation(s)
| | - José R. Soto
- School of Natural Resources and the Environment, University of Arizona, Tucson, Arizona
| | | | - Elizabeth Jacobs
- College of Public Health, University of Arizona, Tucson, Arizona
- Arizona Cancer Center, University of Arizona, Tucson, Arizona
| | | | - Kacey C. Ernst
- College of Public Health, University of Arizona, Tucson, Arizona
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23
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Fang L, Hu W, Pan G. Meteorological factors cannot be ignored in machine learning-based methods for predicting dengue, a systematic review. INTERNATIONAL JOURNAL OF BIOMETEOROLOGY 2024; 68:401-410. [PMID: 38150020 DOI: 10.1007/s00484-023-02605-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/18/2023] [Accepted: 12/13/2023] [Indexed: 12/28/2023]
Abstract
In recent years, there has been a rapid increase in the application of machine learning methods about predicting the incidence of dengue fever. However, the predictive factors and models employed in different studies vary greatly. Hence, we conducted a systematic review to summarize machine learning methods and predictors in previous studies. We searched PubMed, ScienceDirect, and Web of Science databases for articles published up to July 2023. The selected papers included not only the forecast of dengue incidence but also machine learning methods. A total of 23 papers were included in this study. Predictive factors included meteorological factors (22, 95.7%), historical dengue data (14, 60.9%), environmental factors (4, 17.4%), socioeconomic factors (4, 17.4%), vector surveillance data (2, 8.7%), and internet search data (3, 13.0%). Among meteorological factors, temperature (20, 87.0%), rainfall (20, 87.0%), and relative humidity (14, 60.9%) were the most commonly used. We found that Support Vector Machine (SVM) (6, 26.1%), Long Short-Term Memory (LSTM) (5, 21.7%), Random Forest (RF) (4, 17.4%), Least Absolute Shrinkage and Selection Operator (LASSO) (2, 8.7%), ensemble model (2, 8.7%), and other models (4, 17.4%) were identified as the best models based on evaluation metrics used in each article. These results indicate that meteorological factors are important predictors that cannot be ignored and SVM and LSTM algorithms are the most commonly used models in dengue fever prediction with good predictive performance. This review will contribute to the development of more robust early dengue warning systems and promote the application of machine learning methods in predicting climate-related infectious diseases.
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Affiliation(s)
- Lanlan Fang
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Wan Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Guixia Pan
- Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, 81 Meishan Road, Hefei, 230032, Anhui, China.
- The Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, China.
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24
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Sohail A, Anders KL, McGuinness SL, Leder K. The epidemiology of imported and locally acquired dengue in Australia, 2012-2022. J Travel Med 2024; 31:taae014. [PMID: 38243558 PMCID: PMC10911064 DOI: 10.1093/jtm/taae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 01/21/2024]
Abstract
BACKGROUND Dengue is the most important arboviral disease globally and poses ongoing challenges for control including in non-endemic countries with competent mosquito vectors at risk of local transmission through imported cases. We examined recent epidemiological trends in imported and locally acquired dengue in Australia, where the Wolbachia mosquito population replacement method was implemented throughout dengue-prone areas of northern Queensland between 2011 and 2019. METHODS We analysed dengue cases reported to the Australian National Notifiable Disease Surveillance System between January 2012 and December 2022, and Australian traveller movement data. RESULTS Between 2012 and 2022, 13 343 dengue cases were reported in Australia (median 1466 annual cases); 12 568 cases (94.2%) were imported, 584 (4.4%) were locally acquired and 191 (1.4%) had no origin recorded. Locally acquired cases decreased from a peak in 2013 (n = 236) to zero in 2021-22. Annual incidence of imported dengue ranged from 8.29/100 000 (n = 917 cases) to 22.10/100 000 (n = 2203) annual traveller movements between 2012 and 2019, decreased in 2020 (6.74/100 000 traveller movements; n = 191) and 2021 (3.32/100 000 traveller movements; n = 10) during COVID-19-related border closures, then rose to 34.79/100 000 traveller movements (n = 504) in 2022. Imported cases were primarily acquired in Southeast Asia (n = 9323; 74%), Southern and Central Asia (n = 1555; 12%) and Oceania (n = 1341; 11%). Indonesia (n = 5778; 46%) and Thailand (n = 1483; 12%) were top acquisition countries. DENV-2 (n = 2147; 42%) and DENV-1 (n = 1526; 30%) were predominant serotypes. CONCLUSION Our analysis highlights Australia's successful control of locally acquired dengue with Wolbachia. Imported dengue trends reflect both Australian travel destinations and patterns and local epidemiology in endemic countries.
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Affiliation(s)
- Asma Sohail
- School of Public Health and Preventive Medicine, Monash University, 553 St Kilda Road, Melbourne, Victoria 3004, Australia
- Infectious Diseases Department, Grampians Health Service, 1 Drummond Street North, Ballarat, Victoria 3350, Australia
| | - Katherine L Anders
- School of Public Health and Preventive Medicine, Monash University, 553 St Kilda Road, Melbourne, Victoria 3004, Australia
- World Mosquito Program, Monash University, 12 Innovation Walk, Clayton, Victoria 3800, Australia
| | - Sarah L McGuinness
- School of Public Health and Preventive Medicine, Monash University, 553 St Kilda Road, Melbourne, Victoria 3004, Australia
- Infectious Diseases Department, Alfred Health, 55 Commercial Road, Melbourne, Victoria 3004, Australia
| | - Karin Leder
- School of Public Health and Preventive Medicine, Monash University, 553 St Kilda Road, Melbourne, Victoria 3004, Australia
- Victorian Infectious Diseases Service, Melbourne Health, 300 Grattan Street, Parkville, Victoria 3050, Australia
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25
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Kada S, Paz-Bailey G, Adams LE, Johansson MA. Age-specific case data reveal varying dengue transmission intensity in US states and territories. PLoS Negl Trop Dis 2024; 18:e0011143. [PMID: 38427702 PMCID: PMC10936865 DOI: 10.1371/journal.pntd.0011143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/13/2024] [Accepted: 02/08/2024] [Indexed: 03/03/2024] Open
Abstract
Dengue viruses (DENV) are endemic in the US territories of Puerto Rico, American Samoa, and the US Virgin Islands, with focal outbreaks also reported in the states of Florida and Hawaii. However, little is known about the intensity of dengue virus transmission over time and how dengue viruses have shaped the level of immunity in these populations, despite the importance of understanding how and why levels of immunity against dengue may change over time. These changes need to be considered when responding to future outbreaks and enacting dengue management strategies, such as guiding vaccine deployment. We used catalytic models fitted to case surveillance data stratified by age from the ArboNET national arboviral surveillance system to reconstruct the history of recent dengue virus transmission in Puerto Rico, American Samoa, US Virgin Islands, Florida, Hawaii, and Guam. We estimated average annual transmission intensity (i.e., force of infection) of DENV between 2010 and 2019 and the level of seroprevalence by age group in each population. We compared models and found that assuming all reported cases are secondary infections generally fit the surveillance data better than assuming all cases are primary infections. Using the secondary case model, we found that force of infection was highly heterogeneous between jurisdictions and over time within jurisdictions, ranging from 0.00008 (95% CrI: 0.00002-0.0004) in Florida to 0.08 (95% CrI: 0.044-0.14) in American Samoa during the 2010-2019 period. For early 2020, we estimated that seropositivity in 10 year-olds ranged from 0.09% (0.02%-0.54%) in Florida to 56.3% (43.7%-69.3%) in American Samoa. In the absence of serological data, age-specific case notification data collected through routine surveillance combined with mathematical modeling are powerful tools to monitor arbovirus circulation, estimate the level of population immunity, and design dengue management strategies.
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Affiliation(s)
- Sarah Kada
- US Center for Disease Control and Prevention (CDC), Dengue Branch, San Juan, Puerto Rico
| | - Gabriela Paz-Bailey
- US Center for Disease Control and Prevention (CDC), Dengue Branch, San Juan, Puerto Rico
| | - Laura E. Adams
- US Center for Disease Control and Prevention (CDC), Dengue Branch, San Juan, Puerto Rico
| | - Michael A. Johansson
- US Center for Disease Control and Prevention (CDC), Dengue Branch, San Juan, Puerto Rico
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26
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Akter R, Tasneem F, Das S, Soma MA, Georgakopoulos-Soares I, Juthi RT, Sazed SA. Approaches of dengue control: vaccine strategies and future aspects. Front Immunol 2024; 15:1362780. [PMID: 38487527 PMCID: PMC10937410 DOI: 10.3389/fimmu.2024.1362780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Accepted: 02/08/2024] [Indexed: 03/17/2024] Open
Abstract
Dengue, caused by the dengue virus (DENV), affects millions of people worldwide every year. This virus has two distinct life cycles, one in the human and another in the mosquito, and both cycles are crucial to be controlled. To control the vector of DENV, the mosquito Aedes aegypti, scientists employed many techniques, which were later proved ineffective and harmful in many ways. Consequently, the attention shifted to the development of a vaccine; researchers have targeted the E protein, a surface protein of the virus and the NS1 protein, an extracellular protein. There are several types of vaccines developed so far, such as live attenuated vaccines, recombinant subunit vaccines, inactivated virus vaccines, viral vectored vaccines, DNA vaccines, and mRNA vaccines. Along with these, scientists are exploring new strategies of developing improved version of the vaccine by employing recombinant DNA plasmid against NS1 and also aiming to prevent the infection by blocking the DENV life cycle inside the mosquitoes. Here, we discussed the aspects of research in the field of vaccines until now and identified some prospects for future vaccine developments.
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Affiliation(s)
- Runa Akter
- Department of Pharmacy, Independent University Bangladesh, Dhaka, Bangladesh
- Department of Clinical Pharmacy and Pharmacology, Faculty of Pharmacy, University of Dhaka, Dhaka, Bangladesh
| | - Faria Tasneem
- Department of Clinical Pharmacy and Pharmacology, Faculty of Pharmacy, University of Dhaka, Dhaka, Bangladesh
| | - Shuvo Das
- Department of Clinical Pharmacy and Pharmacology, Faculty of Pharmacy, University of Dhaka, Dhaka, Bangladesh
| | | | - Ilias Georgakopoulos-Soares
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Rifat Tasnim Juthi
- Department of Biochemistry and Molecular Biology, University of Dhaka, Dhaka, Bangladesh
| | - Saiful Arefeen Sazed
- Institute for Personalized Medicine, Department of Biochemistry and Molecular Biology, Pennsylvania State University College of Medicine, Hershey, PA, United States
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Hcini N, Lambert V, Picone O, Carod JF, Carles G, Pomar L, Epelboin L, Nacher M. Arboviruses and pregnancy: are the threats visible or hidden? Trop Dis Travel Med Vaccines 2024; 10:4. [PMID: 38355934 PMCID: PMC10868105 DOI: 10.1186/s40794-023-00213-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/22/2023] [Indexed: 02/16/2024] Open
Abstract
Mosquito-borne arboviral diseases are a global concern and can have severe consequences on maternal, neonatal, and child health. Their impact on pregnancy tends to be neglected in developing countries. Despite hundreds of millions of infections, 90% pregnancies being exposed, scientific data on pregnant women is poor and sometimes non-existent. Recently and since the 2016 Zika virus outbreak, there has been a newfound interest in these diseases. Through various neuropathogenic, visceral, placental, and teratogenic mechanisms, these arbovirus infections can lead to fetal losses, obstetrical complications, and a wide range of congenital abnormalities, resulting in long-term neurological and sensory impairments. Climate change, growing urbanization, worldwide interconnectivity, and ease of mobility allow arboviruses to spread to other territories and impact populations that had never been in contact with these emerging agents before. Pregnant travelers are also at risk of infection with potential subsequent complications. Beyond that, these pathologies show the inequalities of access to care on a global scale in a context of demographic growth and increasing urbanization. It is essential to promote research, diagnostic tools, treatments, and vaccine development to address this emerging threat.Background The vulnerability of pregnant women and fetuses to emergent and re-emergent pathogens has been notably illustrated by the outbreaks of Zika virus. Our comprehension of the complete scope and consequences of these infections during pregnancy remains limited, particularly among those involved in perinatal healthcare, such as obstetricians and midwives. This review aims to provide the latest information and recommendations regarding the various risks, management, and prevention for pregnant women exposed to arboviral infections.
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Affiliation(s)
- Najeh Hcini
- Department of Obstetrics and Gynecology, West French Guiana Hospital Center, Saint-Laurent-du-Maroni, French Guiana.
- CIC Inserm 1424 and DFR Santé Université Guyane, Cayenne, French Guiana, France.
| | - Véronique Lambert
- Department of Obstetrics and Gynecology, West French Guiana Hospital Center, Saint-Laurent-du-Maroni, French Guiana
| | - Olivier Picone
- Department of Obstetrics and Gynecology, Hôpital Louis Mourier, Hôpitaux Universitaires Paris Nord Val de Seine, Assistance Publique : Hôpitaux de Paris, Université Paris Diderot, CEDEX, Colombes, France
| | - Jean-Francois Carod
- Department of Biology, West French Guiana Hospital Center, Saint-Laurent-du-Maroni, French Guiana
| | - Gabriel Carles
- Department of Obstetrics and Gynecology, West French Guiana Hospital Center, Saint-Laurent-du-Maroni, French Guiana
| | - Léo Pomar
- Materno-Fetal and Obstetrics Research Unit, Department "Woman-Mother-Child", Lausanne University Hospital, Lausanne, Switzerland
| | - Loïc Epelboin
- Department of Infectious and Tropical Diseases, Cayenne General Hospital, Cayenne, French Guiana, France
| | - Mathieu Nacher
- Centre d'Investigation Clinique Antilles Guyane, Inserm CIC1424, Centre Hospitalier de Cayenne, 97300, Cayenne, French Guiana
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28
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Wang Y, Troutman MC, Hofmann C, Gonzalez A, Song L, Levin R, Pixley HY, Kearns K, DePhillips P, Loughney JW. Fully automated high-throughput immuno-µPlaque assay for live-attenuated tetravalent dengue vaccine development. Front Immunol 2024; 15:1356600. [PMID: 38410513 PMCID: PMC10895029 DOI: 10.3389/fimmu.2024.1356600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 01/29/2024] [Indexed: 02/28/2024] Open
Abstract
Dengue fever has remained a continuing global medical threat that impacts half of the world's population. Developing a highly effective dengue vaccine, with live-attenuated tetravalent vaccines as leading candidates, remains essential in preventing this disease. For the development of live virus vaccines (LVVs), potency measurements play a vital role in quantifying the active components of vaccine drug substance as well as drug product during various stages of research, development, and post-licensure evaluations. Traditional plaque-based assays are one of the most common potency test methods, but they generally take up to weeks to complete. Less labor and time-intensive potency assays are thus called for to aid in the acceleration of vaccine development, especially for multivalent LVVs. Here, we introduce a fully automated, 96-well format µPlaque assay that has been optimized as a high-throughput tool to evaluate process and formulation development of a live-attenuated tetravalent dengue vaccine. To the best of our knowledge, this is the first report of a miniaturized viral plaque method for dengue with full automation via an integrated robotic system. Compared to the traditional manual plaque assay, this newly developed method substantially reduces testing time by approximately half and allows for the evaluation of over ten times more samples per run. The fully automated workflow, from cell culture to plaque counting, significantly minimizes analyst hands-on time and improves assay repeatability. The study presents a pioneering solution for the rapid measurement of LVV viral titers, offering promising prospects for advancing vaccine development through high-throughput analytics.
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Affiliation(s)
- Yi Wang
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - Matthew C. Troutman
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - Carl Hofmann
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - Ariel Gonzalez
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - Liping Song
- Biostatistics, Merck & Co., Inc., Rahway, NJ, United States
| | - Robert Levin
- Vaccine Drug Product Development, Merck & Co., Inc, Rahway, NJ, United States
| | - Heidi Yoder Pixley
- Vaccine Drug Product Development, Merck & Co., Inc, Rahway, NJ, United States
| | - Kristine Kearns
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - Pete DePhillips
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
| | - John W. Loughney
- Analytical Research & Development, Merck & Co., Inc., Rahway, NJ, United States
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Samuel J, Ghosh S, Thiyagarajan S. Identification and characterization of domain-specific inhibitors of DENV NS3 and NS5 proteins by in silico screening methods. J Biomol Struct Dyn 2024:1-15. [PMID: 38334186 DOI: 10.1080/07391102.2024.2313161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 01/26/2024] [Indexed: 02/10/2024]
Abstract
The dengue virus (DENV) infects approximately 400 million people annually worldwide causing significant morbidity and mortality. Despite advances in understanding the virus life cycle and infectivity, no specific treatment for this disease exists due to the lack of therapeutic drugs. In addition, vaccines available currently are ineffective with severe side effects. Therefore, there is an urgent need for developing therapeutics suitable for effective management of DENV infection. In this study, we adopted a drug repurposing strategy to identify new therapeutic use of existing FDA approved drug molecules to target DENV2 non-structural proteins NS3 and NS5 using computational approaches. We used Drugbank database molecules for virtual screening and multiple docking analysis against a total of four domains, the NS3 protease and helicase domains and NS5 MTase and RdRp domains. Subsequently, MD simulations and MM-PBSA analysis were performed to validate the intrinsic atomic interactions and the binding affinities. Furthermore, the internal dynamics in all four protein domains, in presence of drug molecule binding were assessed using essential dynamics and free energy landscape analyses, which were further coupled with conformational dynamics-based clustering studies and cross-correlation analysis to map the regions that exhibit these structural variations. Our comprehensive analysis identified tolcapone, cefprozil, delavirdine and indinavir as potential inhibitors of NS5 MTase, NS5 RdRp, NS3 protease and NS3 helicase functions, respectively. These high-confidence candidate molecules will be useful for developing effective anti-DENV therapy to combat dengue infection.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Johnson Samuel
- Institute of Bioinformatics and Applied Biotechnology (IBAB), Bengaluru, KA, India
| | - Sanjay Ghosh
- Institute of Bioinformatics and Applied Biotechnology (IBAB), Bengaluru, KA, India
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30
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Ali N. The recent burden of dengue infection in Bangladesh: A serious public health issue. J Infect Public Health 2024; 17:226-228. [PMID: 38113820 DOI: 10.1016/j.jiph.2023.12.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 11/10/2023] [Accepted: 12/04/2023] [Indexed: 12/21/2023] Open
Abstract
Dengue is a rapidly increasing vector-borne disease with a high burden in South and Southeast Asia. This article presents an overview of the current dengue situation in Bangladesh, highlighting the critical public health challenges caused by this infectious disease. Between January and September 2023, a total of 203406 people were infected, and 989 people died, with a case fatality rate of 0.49%. Of these, 96.1% of infections and 95.2% of deaths occurred between July and September. Both infection and mortality rates showed a significant and positive correlation with population density and air quality index. Other environmental and socioeconomic factors may influence the burden of dengue infection. These include temperature, rainfall, humidity, unplanned urbanization, and water storage and waste management practices. To reduce transmission and mortality rates, it is urgent to prioritize early treatment of dengue cases and take measures to address the risk factors associated with dengue infection in the country.
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Affiliation(s)
- Nurshad Ali
- Department of Biochemistry and Molecular Biology, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh.
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31
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Nitinai N, Nasomsong W, Chuerboonchai W, Tweekittikul A, Khingmontri V, Panuvatvanich B, Bangchuad T, Pongpraijaroen M, Roongfa-ngarm T, Vasikasin V. Effect of montelukast in preventing dengue with warning signs among patients with dengue: A multicenter, randomized, double-blind, placebo-controlled trial. PLoS Negl Trop Dis 2024; 18:e0011927. [PMID: 38306389 PMCID: PMC10866515 DOI: 10.1371/journal.pntd.0011927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/14/2024] [Accepted: 01/20/2024] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Montelukast has shown potential as a candidate treatment for dengue. This study aimed to evaluate the efficacy and safety of montelukast in preventing dengue with warning signs. METHODS This multicenter, randomized, double-blind, placebo-controlled trial enrolled adult participants with NS1 antigenemia in Thailand. The participants were randomly assigned to receive either oral montelukast (10 mg) or a placebo for 10 days or until all symptoms resolved. RESULTS Between January 2021 and June 2023, 358 participants were enrolled and randomly assigned (1:1) to receive either montelukast or placebo. The incidence rate of warning signs in the montelukast group and the placebo group were 9.5% and 7.8% per day, respectively. There was no difference between the two groups (HR 1.36; 95%CI 0.94-1.96, P = 0.105). No statistically significant differences were observed in the incidence rate of severe dengue, hemoconcentration, thrombocytopenia, admission, or recovery from dengue. Neither dengue shock, nor mortality occurred. The montelukast group exhibited a decreased incidence rate of transaminase elevations (0.7% vs 1.4% per day, HR: 0.48, 95%CI 0.25-0.90, P = 0.023). CONCLUSION Oral montelukast does not reduce the incidence of warning signs among patients with dengue. Nevertheless, the observed decrease in transaminase elevations warrants further investigation to evaluate the potential effect of montelukast. CLINICAL TRIALS REGISTRATION Clinicaltrials.gov, NCT04673422, registered on 9 December 2020.
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Affiliation(s)
- Nattapat Nitinai
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | - Worapong Nasomsong
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
| | | | | | - Vutthikorn Khingmontri
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
- Department of Internal Medicine, Ananda Mahidol Hospital, Lopburi, Thailand
| | - Bawornnan Panuvatvanich
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
- Department of Internal Medicine, Ananda Mahidol Hospital, Lopburi, Thailand
| | - Thananut Bangchuad
- Department of Internal Medicine, Fort Suranari Hospital, Nakhon Ratchasima, Thailand
| | - Maynanchaya Pongpraijaroen
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
- Department of Internal Medicine, Fort Suranari Hospital, Nakhon Ratchasima, Thailand
| | - Tanapol Roongfa-ngarm
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
- Department of Internal Medicine, Fort Suranari Hospital, Nakhon Ratchasima, Thailand
| | - Vasin Vasikasin
- Department of Internal Medicine, Phramongkutklao Hospital and College of Medicine, Bangkok, Thailand
- Department of Internal Medicine, Ananda Mahidol Hospital, Lopburi, Thailand
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32
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Xu L, Li M, Zhang J, Li D, Tao J, Zhang F, Jin X, Lu J, Liu T. Metabolomic landscape of macrophage discloses an anabolic signature of dengue virus infection and antibody-dependent enhancement of viral infection. PLoS Negl Trop Dis 2024; 18:e0011923. [PMID: 38306392 PMCID: PMC10866464 DOI: 10.1371/journal.pntd.0011923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 02/14/2024] [Accepted: 01/17/2024] [Indexed: 02/04/2024] Open
Abstract
Dengue virus (DENV) infection causes dengue fever, the most prevalent arthropod-transmitted viral disease worldwide. Viruses are acellular parasites and obligately rely on host cell machinery for reproduction. Previous studies have indicated metabolomic changes in endothelial cell models and sera of animal models and patients with dengue fever. To probe the immunometabolic mechanism of DENV infection, here, we report the metabolomic landscape of a human macrophage cell model of DENV infection and its antibody-dependent enhancement. DENV infection of THP-1-derived macrophages caused 202 metabolic variants, of which amino acids occupied 23.7%, fatty acids 21.78%, carbohydrates 10.4%, organic acids 13.37%, and carnitines 10.4%. These metabolomic changes indicated an overall anabolic signature, which was characterized by the global exhaustion of amino acids, increases of cellular fatty acids, carbohydrates and pentoses, but decreases of acylcarnitine. Significant activation of metabolic pathways of glycolysis, pentose phosphate, amino acid metabolism, and tricarboxylic acid cycle collectively support the overall anabolism to meet metabolic demands of DENV replication and immune activation by viral infection. Totally 88 of 202 metabolic variants were significantly changed by DENV infection, 36 of which met the statistical standard (P<0.05, VIP>1.5) of differentially expressed metabolites, which were the predominantly decreased variants of acylcarnitine and the increased variants of fatty acids and carbohydrates. Remarkably, 11 differentially expressed metabolites were significantly distinct between DENV only infection and antibody-dependent enhancement of viral infection. Our data suggested that the anabolic activation by DENV infection integrates the viral replication and anti-viral immune activation.
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Affiliation(s)
- Li Xu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Min Li
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Jingpu Zhang
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Dongxiao Li
- Metabo-Profile Biotechnology Company, Shanghai, China
| | - Jie Tao
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Fuchun Zhang
- Guangzhou Eighth People’s Hospital, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xia Jin
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Jiahai Lu
- Key Laboratory for Tropical Disease Control, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou 510080, China
- National Medical Products Administration Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou 510080, China
- Hainan Key Novel Thinktank "Hainan Medical University ’One Health’ Research Center", Haikou 571199, China
- Institute of One Health, Wenzhou Medical University, Wenzhou, Zhejiang, 325035, China
| | - Tiefu Liu
- Scientific Research Center, Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
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33
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Corrêa-Antônio J, David MR, Couto-Lima D, Garcia GA, Keirsebelik MSG, Maciel-de-Freitas R, Pavan MG. DENV-1 Titer Impacts Viral Blocking in wMel Aedes aegypti with Brazilian Genetic Background. Viruses 2024; 16:214. [PMID: 38399990 PMCID: PMC10891765 DOI: 10.3390/v16020214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/23/2024] [Accepted: 01/28/2024] [Indexed: 02/25/2024] Open
Abstract
Several countries have been using Wolbachia deployments to replace highly competent native Aedes aegypti populations with Wolbachia-carrying mosquitoes with lower susceptibility to arboviruses such as dengue, Zika, and chikungunya. In Rio de Janeiro, Wolbachia deployments started in 2015 and still present a moderate introgression with a modest reduction in dengue cases in humans (38%). Here, we evaluated the vector competence of wild-type and wMel-infected Ae. aegypti with a Brazilian genetic background to investigate whether virus leakage could contribute to the observed outcomes in Brazil. We collected the specimens in three areas of Rio de Janeiro with distinct frequencies of mosquitoes with wMel strain and two areas with wild Ae. aegypti. The mosquitoes were orally exposed to two titers of DENV-1 and the saliva of DENV-1-infected Ae. aegypti was microinjected into wMel-free mosquitoes to check their infectivity. When infected with the high DENV-1 titer, the presence of wMel did not avoid viral infection in mosquitoes' bodies and saliva but DENV-1-infected wMel mosquitoes produced lower viral loads than wMel-free mosquitoes. On the other hand, wMel mosquitoes infected with the low DENV-1 titer were less susceptible to virus infection than wMel-free mosquitoes, although once infected, wMel and wMel-free mosquitoes exhibited similar viral loads in the body and the saliva. Our results showed viral leakage in 60% of the saliva of wMel mosquitoes with Brazilian background; thus, sustained surveillance is imperative to monitor the presence of other circulating DENV-1 strains capable of overcoming the Wolbachia blocking phenotype, enabling timely implementation of action plans.
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Affiliation(s)
- Jessica Corrêa-Antônio
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
| | - Mariana R. David
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
| | - Dinair Couto-Lima
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
| | - Gabriela Azambuja Garcia
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
| | - Milan S. G. Keirsebelik
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
| | - Rafael Maciel-de-Freitas
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
- Department of Arbovirology, Bernhard Nocht Institute of Tropical Medicine, 20359 Hamburg, Germany
| | - Márcio Galvão Pavan
- Laboratório de Mosquitos Transmissores de Hematozoários, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro 21040-900, Brazil; (J.C.-A.); (M.R.D.); (D.C.-L.); (G.A.G.); (M.S.G.K.); (R.M.-d.-F.)
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34
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Li M, Kandul NP, Sun R, Yang T, Benetta ED, Brogan DJ, Antoshechkin I, Sánchez C HM, Zhan Y, DeBeaubien NA, Loh YM, Su MP, Montell C, Marshall JM, Akbari OS. Targeting sex determination to suppress mosquito populations. eLife 2024; 12:RP90199. [PMID: 38289340 PMCID: PMC10945564 DOI: 10.7554/elife.90199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024] Open
Abstract
Each year, hundreds of millions of people are infected with arboviruses such as dengue, yellow fever, chikungunya, and Zika, which are all primarily spread by the notorious mosquito Aedes aegypti. Traditional control measures have proven insufficient, necessitating innovations. In response, here we generate a next-generation CRISPR-based precision-guided sterile insect technique (pgSIT) for Ae. aegypti that disrupts genes essential for sex determination and fertility, producing predominantly sterile males that can be deployed at any life stage. Using mathematical models and empirical testing, we demonstrate that released pgSIT males can effectively compete with, suppress, and eliminate caged mosquito populations. This versatile species-specific platform has the potential for field deployment to effectively control wild populations of disease vectors.
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Affiliation(s)
- Ming Li
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Nikolay P Kandul
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Ruichen Sun
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Ting Yang
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Elena D Benetta
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Daniel J Brogan
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
| | - Igor Antoshechkin
- Division of Biology and Biological Engineering (BBE), California Institute of TechnologyPasadenaUnited States
| | - Héctor M Sánchez C
- Divisions of Epidemiology & Biostatistics, School of Public Health, University of California, BerkeleyBerkeleyUnited States
| | - Yinpeng Zhan
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research, Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - Nicolas A DeBeaubien
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research, Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - YuMin M Loh
- Graduate School of Science, Nagoya UniversityNagoyaJapan
| | - Matthew P Su
- Graduate School of Science, Nagoya UniversityNagoyaJapan
- Institute for Advanced Research, Nagoya UniversityNagoyaJapan
| | - Craig Montell
- Department of Molecular, Cellular, and Developmental Biology and the Neuroscience Research, Institute, University of California, Santa BarbaraSanta BarbaraUnited States
| | - John M Marshall
- Divisions of Epidemiology & Biostatistics, School of Public Health, University of California, BerkeleyBerkeleyUnited States
- Innovative Genomics InstituteBerkeleyUnited States
| | - Omar S Akbari
- School of Biological Sciences, Department of Cell and Developmental Biology, University of California, BerkeleyBerkeleyUnited States
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Sung J, Cheong Y, Kim YS, Ahn J, Sohn MH, Byun S, Seong BL. Harnessing Pentameric Scaffold of Cholera Toxin B (CTB) for Design of Subvirion Recombinant Dengue Virus Vaccine. Vaccines (Basel) 2024; 12:92. [PMID: 38250905 PMCID: PMC10819241 DOI: 10.3390/vaccines12010092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 01/23/2024] Open
Abstract
Dengue virus is an enveloped virus with an icosahedral assembly of envelope proteins (E). The E proteins are arranged as a head-to-tail homodimer, and domain III (EDIII) is placed at the edge of the dimer, converging to a pentamer interface. For a structure-based approach, cholera toxin B (CTB) was harnessed as a structural scaffold for the five-fold symmetry of EDIII. Pivoted by an RNA-mediated chaperone for the protein folding and assembly, CTB-EDIII of dengue serotype 1 (DV1) was successfully produced as soluble pentamers in an E. coli host with a high yield of about 28 mg/L. Immunization of mice with CTB-DV1EDIII elicited increased levels of neutralizing antibodies against infectious viruses compared to the control group immunized with DV1EDIII without CTB fusion. IgG isotype switching into a balanced Th1/Th2 response was also observed, probably triggered by the intrinsic adjuvant activity of CTB. Confirming the immune-enhancing potential of CTB in stabilizing the pentamer assembly of EDIII, this study introduces a low-cost bacterial production platform designed to augment the soluble production of subunit vaccine candidates, particularly those targeting flaviviruses.
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Affiliation(s)
- Jemin Sung
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea; (J.S.); (Y.-S.K.)
| | - Yucheol Cheong
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea; (J.S.); (Y.-S.K.)
| | - Young-Seok Kim
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea; (J.S.); (Y.-S.K.)
| | - Jina Ahn
- The Interdisciplinary Graduate Program in Integrative Biotechnology & Translational Medicine, Yonsei University, Incheon 21983, Republic of Korea;
| | - Myung Hyun Sohn
- Department of Pediatrics, College of Medicine, Yonsei University, Seoul 03722, Republic of Korea;
| | - Sanguine Byun
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea; (J.S.); (Y.-S.K.)
- POSTECH Biotech Center, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Baik-Lin Seong
- Department of Microbiology and Immunology, College of Medicine, Yonsei University, Seoul 03722, Republic of Korea
- Vaccine Innovative Technology ALliance (VITAL)-Korea, Yonsei University, Seoul 03722, Republic of Korea
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Celone M, Beeman S, Han BA, Potter AM, Pecor DB, Okech B, Pollett S. Understanding transmission risk and predicting environmental suitability for Mayaro Virus in Central and South America. PLoS Negl Trop Dis 2024; 18:e0011859. [PMID: 38194417 PMCID: PMC10775973 DOI: 10.1371/journal.pntd.0011859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 12/12/2023] [Indexed: 01/11/2024] Open
Abstract
Mayaro virus (MAYV) is a mosquito-borne Alphavirus that is widespread in South America. MAYV infection often presents with non-specific febrile symptoms but may progress to debilitating chronic arthritis or arthralgia. Despite the pandemic threat of MAYV, its true distribution remains unknown. The objective of this study was to clarify the geographic distribution of MAYV using an established risk mapping framework. This consisted of generating evidence consensus scores for MAYV presence, modeling the potential distribution of MAYV in select countries across Central and South America, and estimating the population residing in areas suitable for MAYV transmission. We compiled a georeferenced compendium of MAYV occurrence in humans, animals, and arthropods. Based on an established evidence consensus framework, we integrated multiple information sources to assess the total evidence supporting ongoing transmission of MAYV within each country in our study region. We then developed high resolution maps of the disease's estimated distribution using a boosted regression tree approach. Models were developed using nine climatic and environmental covariates that are related to the MAYV transmission cycle. Using the output of our boosted regression tree models, we estimated the total population living in regions suitable for MAYV transmission. The evidence consensus scores revealed high or very high evidence of MAYV transmission in several countries including Brazil (especially the states of Mato Grosso and Goiás), Venezuela, Peru, Trinidad and Tobago, and French Guiana. According to the boosted regression tree models, a substantial region of South America is suitable for MAYV transmission, including north and central Brazil, French Guiana, and Suriname. Some regions (e.g., Guyana) with only moderate evidence of known transmission were identified as highly suitable for MAYV. We estimate that approximately 58.9 million people (95% CI: 21.4-100.4) in Central and South America live in areas that may be suitable for MAYV transmission, including 46.2 million people (95% CI: 17.6-68.9) in Brazil. Our results may assist in prioritizing high-risk areas for vector control, human disease surveillance and ecological studies.
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Affiliation(s)
- Michael Celone
- Department of Preventive Medicine & Biostatistics, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland, United States of America
| | - Sean Beeman
- Department of Preventive Medicine & Biostatistics, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland, United States of America
| | - Barbara A. Han
- Cary Institute of Ecosystem Studies, Millbrook, New York, United States of America
| | - Alexander M. Potter
- One Health Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
- Walter Reed Biosystematics Unit, Smithsonian Museum Support Center, Suitland, Maryland, United States of America
- Department of Entomology, Smithsonian Institution—National Museum of Natural History (NMNH), Washington, DC, United States of America
| | - David B. Pecor
- One Health Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
- Walter Reed Biosystematics Unit, Smithsonian Museum Support Center, Suitland, Maryland, United States of America
- Department of Entomology, Smithsonian Institution—National Museum of Natural History (NMNH), Washington, DC, United States of America
| | - Bernard Okech
- Department of Preventive Medicine & Biostatistics, Uniformed Services University of the Health Sciences, F. Edward Hébert School of Medicine, Bethesda, Maryland, United States of America
| | - Simon Pollett
- Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland, United States of America
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Beloukas A. Dengue: Another viral infection with mucocutaneous manifestations. J Eur Acad Dermatol Venereol 2024; 38:15-16. [PMID: 38126691 DOI: 10.1111/jdv.19589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 10/26/2023] [Indexed: 12/23/2023]
Affiliation(s)
- Apostolos Beloukas
- Department of Biomedical Sciences, University of West Attica, Athens, Greece
- National AIDS Reference Centre of Southern Greece, School of Public Health, University of West Attica, Athens, Greece
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Kakde U, Khatib MN. Neurological Complications in Dengue Among Males of the Adult Age Group. Cureus 2024; 16:e51586. [PMID: 38313931 PMCID: PMC10835196 DOI: 10.7759/cureus.51586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/03/2024] [Indexed: 02/06/2024] Open
Abstract
Neurological problems are more frequently linked to dengue, a mosquito-transmitted virus common in tropical areas. This review study thoroughly examines the effects of dengue on adult males' neurological systems. Dengue hemorrhagic fever (DHF) or dengue shock syndrome (DSS) can develop in severe cases of dengue fever caused by the dengue virus (DENV). Unsettlingly, it is thought that a sizable portion of DENV infections impact the central nervous system (CNS), which calls into question the former theory that the DENV is not neurotropic. This review dissects the many neurological manifestations of dengue, spanning from encephalopathy, encephalitis, and other CNS implications to peripheral neuromuscular issues, through the systematic analysis of publications gathered from PubMed. The essay emphasizes the immunological reactions brought on by DENV infections and offers a deeper understanding of the pathophysiology. Given that they exhibit similar first symptoms, Zika and chikungunya are two more illnesses that must be distinguished from dengue. The mainstay of current diagnostic methods is serum and cerebrospinal fluid (CSF) tests, although supportive care is still used. This review highlights the importance of tracking neurological symptoms in dengue patients and encourages more studies in this area.
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Affiliation(s)
- Umesh Kakde
- Medicine, Jawaharlal Nehru Medical College, Datta Meghe Institute of Research and Higher Education, Wardha, IND
| | - Mahalaqua Nazli Khatib
- School of Epidemiology and Public Health, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences, Wardha, IND
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Prakash O, Verma AK, Paliwal A, Abbas F, Srivastava AK, Mishra VK, Radera S, Jain A. Circulating serotypes and genotypes of dengue virus in North India: An observational study. J Vector Borne Dis 2024; 61:117-122. [PMID: 38648413 DOI: 10.4103/0972-9062.392258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 09/20/2023] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND OBJECTIVES This study reports observation on circulating serotypes and genotypes of Dengue Virus in North India. METHODS Serum samples were obtained from suspected cases of dengue referred to the virus diagnostic laboratory during 2014 to 2022. All samples were tested for anti-dengue virus IgM antibodies and NS1Ag by ELISA. NS1Ag positive samples were processed for serotyping and genotyping. RESULTS Total 41,476 dengue suspected cases were referred to the laboratory of which 12,292 (29.6%) tested positive. Anti-Dengue Virus IgM antibodies, NS1Ag, both IgM and NS1Ag, were positive in 7007 (57.4%); 3200 (26.0%) and 2085 (16.0%) cases respectively. Total 762 strains were serotyped during 9-year period. DENV-1, DENV-2, DENV-3 and DENV-4 serotypes were found in 79 (10.37%), 506 (66.40%), 151 (19.82%) and 26 (3.41%) cases respectively. DENV-1, DENV-2 and DENV-3 were in circulation throughout. Total 105 strains were genotyped. Genotype IV of DENV-1 serotype was circulating till 2014 which was later replaced by genotype V. A distinct seasonality with increase in number of cases in post-monsoon period was seen. INTERPRETATION CONCLUSION DENV-1, DENV-2 and DENV-3 were found to be in circulation in North India. Predominant serotype/genotype changed at times, but not at regular intervals.
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Affiliation(s)
- Om Prakash
- Department of Microbiology, King George's Medical University, Lucknow, India
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Hisamuddin M, Rizvi I, Malik A, Nabi F, Hassan MN, Ali SM, Khan JM, Khan TH, Khan RH. Characterization of pH-induced conformational changes in recombinant DENV NS2B-NS3pro. Int J Biol Macromol 2023; 253:126823. [PMID: 37703975 DOI: 10.1016/j.ijbiomac.2023.126823] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/07/2023] [Accepted: 09/07/2023] [Indexed: 09/15/2023]
Abstract
The increasing frequency of Dengue is a cause of severe epidemics and therefore demands strategies for effective prevention, diagnosis, and treatment. DENV-protease is being investigated as a potential therapeutic target. However, due to the flat and highly charged active site of the DENV-protease, designing orthosteric medicines is very difficult. In this study, we have done a thorough analysis of pH-dependent conformational changes in recombinantly expressed DENV protease using various spectroscopic techniques. Our spectroscopic study of DENV protease (NS2B-NS3pro) at different pH conditions gives important insights into the dynamicity of structural conformation. At physiological pH, the DENV-protease exists in a random-coiled state. Lowering the pH promotes the formation of alpha-helical and beta-sheet structures i.e. gain of secondary structure as shown by Far-UV CD. The light scattering and Thioflavin T (ThT)-binding assay proved the aggregation-prone tendency of DENV-protease at pH 4.0. Further, the confocal microscopy image intensity showed the amorphous aggregate formation of DENV protease at pH 4.0. Thus, the DENV protease acquires different conformations with changes in pH conditions. Together, these results have the potential to facilitate the design of a conformation destabilizer-based therapeutic strategy for dengue fever.
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Affiliation(s)
- Malik Hisamuddin
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India
| | - Irum Rizvi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India
| | - Ajamaluddin Malik
- Department of Biochemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, Saudi Arabia
| | - Faisal Nabi
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India
| | - Md Nadir Hassan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India
| | - Syed Moasfar Ali
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India
| | - Javed Masood Khan
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, 2460, Riyadh 11451, Saudi Arabia
| | - Tabish H Khan
- Department of Pathology and Immunology, Washington University in St. Louis School of Medicine, MO, USA
| | - Rizwan H Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh, UP, India.
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Overgaard HJ, Linn NYY, Kyaw AMM, Braack L, Win Tin M, Bastien S, Vande Velde F, Echaubard P, Zaw W, Mukaka M, Maude R. School and community driven dengue vector control and monitoring in Myanmar: Study protocol for a cluster randomized controlled trial. Wellcome Open Res 2023; 7:206. [PMID: 38313099 PMCID: PMC10837613 DOI: 10.12688/wellcomeopenres.18027.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2023] [Indexed: 02/06/2024] Open
Abstract
Background Dengue is the most common and widespread mosquito-borne arboviral disease globally estimated to cause >390 million infections and >20,000 deaths annually. There are no effective preventive drugs and the newly introduced vaccines are not yet available. Control of dengue transmission still relies primarily on mosquito vector control. Although most vector control methods currently used by national dengue control programs may temporarily reduce mosquito populations, there is little evidence that they affect transmission. There is an urgent need for innovative, participatory, effective, and locally adapted approaches for sustainable vector control and monitoring in which students can be particularly relevant contributors and to demonstrate a clear link between vector reduction and dengue transmission reduction, using tools that are inexpensive and easy to use by local communities in a sustainable manner. Methods Here we describe a cluster randomized controlled trial to be conducted in 46 school catchment areas in two townships in Yangon, Myanmar. The outcome measures are dengue cases confirmed by rapid diagnostic test in the townships, dengue incidence in schools, entomological indices, knowledge, attitudes and practice, behavior, and engagement. Conclusions The trial involves middle school students that positions them to become actors in dengue knowledge transfer to their communities and take a leadership role in the delivery of vector control interventions and monitoring methods. Following this rationale, we believe that students can become change agents of decentralized vector surveillance and sustainable disease control in line with recent new paradigms in integrated and participatory vector surveillance and control. This provides an opportunity to operationalize transdisciplinary research towards sustainable health development. Due to the COVID-19 pandemic and political instability in Myanmar the project has been terminated by the donor, but the protocol will be helpful for potential future implementation of the project in Myanmar and/or elsewhere.Registration: This trial was registered in the ISRCTN Registry on 31 May 2022 ( https://doi.org/10.1186/ISRCTN78254298).
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Affiliation(s)
- Hans J. Overgaard
- Faculty of Science and Technology, Norwegian University of Life Sciences, As, 1432, Norway
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, KHON KAEN, 40002, Thailand
| | - Nay Yi Yi Linn
- Central Vector Borne Disease Control Unit, Ministry of Health and Sports, Nay Pyi Taw, Myanmar
| | - Aye Mon Mon Kyaw
- Yangon Regional Health Department, Ministry of Health and Sports, Yangon, Myanmar
| | - Leo Braack
- Malaria Consortium, Bangkok 10400, Thailand
- Institute for Sustainable Malaria Control, University of Pretoria, Pretoria 0028, South Africa
| | | | - Sheri Bastien
- Faculty of Landscape and Society, Norwegian University of Life Sciences, 1432 Ås, Norway
- Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, T2N 1N4, Canada
| | - Fiona Vande Velde
- Faculty of Landscape and Society, Norwegian University of Life Sciences, 1432 Ås, Norway
| | - Pierre Echaubard
- School of Oriental and African Studies (SOAS), University of London, London, WC1H 0XG, UK
- Faculty of Environment and Resource Studies, Mahidol University, Salaya, 73170, Thailand
| | - Win Zaw
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Mavuto Mukaka
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7LG, UK
| | - Richard Maude
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7LG, UK
- Harvard T.H. Chan School of Public Health, Harvard University, Boston, MA, 02115, USA
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Gautam S, Thakur A, Rajput A, Kumar M. Anti-Dengue: A Machine Learning-Assisted Prediction of Small Molecule Antivirals against Dengue Virus and Implications in Drug Repurposing. Viruses 2023; 16:45. [PMID: 38257744 PMCID: PMC10818795 DOI: 10.3390/v16010045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/24/2024] Open
Abstract
Dengue outbreaks persist in global tropical regions, lacking approved antivirals, necessitating critical therapeutic development against the virus. In this context, we developed the "Anti-Dengue" algorithm that predicts dengue virus inhibitors using a quantitative structure-activity relationship (QSAR) and MLTs. Using the "DrugRepV" database, we extracted chemicals (small molecules) and repurposed drugs targeting the dengue virus with their corresponding IC50 values. Then, molecular descriptors and fingerprints were computed for these molecules using PaDEL software. Further, these molecules were split into training/testing and independent validation datasets. We developed regression-based predictive models employing 10-fold cross-validation using a variety of machine learning approaches, including SVM, ANN, kNN, and RF. The best predictive model yielded a PCC of 0.71 on the training/testing dataset and 0.81 on the independent validation dataset. The created model's reliability and robustness were assessed using William's plot, scatter plot, decoy set, and chemical clustering analyses. Predictive models were utilized to identify possible drug candidates that could be repurposed. We identified goserelin, gonadorelin, and nafarelin as potential repurposed drugs with high pIC50 values. "Anti-Dengue" may be beneficial in accelerating antiviral drug development against the dengue virus.
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Affiliation(s)
- Sakshi Gautam
- Virology Unit, Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh 160036, India; (S.G.); (A.T.); (A.R.)
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Anamika Thakur
- Virology Unit, Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh 160036, India; (S.G.); (A.T.); (A.R.)
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Akanksha Rajput
- Virology Unit, Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh 160036, India; (S.G.); (A.T.); (A.R.)
| | - Manoj Kumar
- Virology Unit, Institute of Microbial Technology, Council of Scientific and Industrial Research (CSIR), Sector 39A, Chandigarh 160036, India; (S.G.); (A.T.); (A.R.)
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Côrtes N, Lira A, Prates-Syed W, Dinis Silva J, Vuitika L, Cabral-Miranda W, Durães-Carvalho R, Balan A, Cabral-Marques O, Cabral-Miranda G. Integrated control strategies for dengue, Zika, and Chikungunya virus infections. Front Immunol 2023; 14:1281667. [PMID: 38196945 PMCID: PMC10775689 DOI: 10.3389/fimmu.2023.1281667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 11/24/2023] [Indexed: 01/11/2024] Open
Abstract
Arboviruses are a major threat to public health in tropical regions, encompassing over 534 distinct species, with 134 capable of causing diseases in humans. These viruses are transmitted through arthropod vectors that cause symptoms such as fever, headache, joint pains, and rash, in addition to more serious cases that can lead to death. Among the arboviruses, dengue virus stands out as the most prevalent, annually affecting approximately 16.2 million individuals solely in the Americas. Furthermore, the re-emergence of the Zika virus and the recurrent outbreaks of chikungunya in Africa, Asia, Europe, and the Americas, with one million cases reported annually, underscore the urgency of addressing this public health challenge. In this manuscript we discuss the epidemiology, viral structure, pathogenicity and integrated control strategies to combat arboviruses, and the most used tools, such as vaccines, monoclonal antibodies, treatment, etc., in addition to presenting future perspectives for the control of arboviruses. Currently, specific medications for treating arbovirus infections are lacking, and symptom management remains the primary approach. However, promising advancements have been made in certain treatments, such as Chloroquine, Niclosamide, and Isatin derivatives, which have demonstrated notable antiviral properties against these arboviruses in vitro and in vivo experiments. Additionally, various strategies within vector control approaches have shown significant promise in reducing arbovirus transmission rates. These encompass public education initiatives, targeted insecticide applications, and innovative approaches like manipulating mosquito bacterial symbionts, such as Wolbachia. In conclusion, combatting the global threat of arbovirus diseases needs a comprehensive approach integrating antiviral research, vaccination, and vector control. The continued efforts of research communities, alongside collaborative partnerships with public health authorities, are imperative to effectively address and mitigate the impact of these arboviral infections on public health worldwide.
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Affiliation(s)
- Nelson Côrtes
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Interunits Graduate Program in Biotechnology of the University of São Paulo, the Butantan Institute and the Technological Research Institute of the State of São Paulo, São Paulo, Brazil
| | - Aline Lira
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Interunits Graduate Program in Biotechnology of the University of São Paulo, the Butantan Institute and the Technological Research Institute of the State of São Paulo, São Paulo, Brazil
| | - Wasim Prates-Syed
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Interunits Graduate Program in Biotechnology of the University of São Paulo, the Butantan Institute and the Technological Research Institute of the State of São Paulo, São Paulo, Brazil
| | - Jaqueline Dinis Silva
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Graduate Program in Pathophysiology and Toxicology, Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Larissa Vuitika
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | - Ricardo Durães-Carvalho
- São Paulo School of Medicine, Department of Microbiology, Immunology and Parasitology, Federal University of São Paulo, São Paulo, Brazil
| | - Andrea Balan
- The Interunits Graduate Program in Biotechnology of the University of São Paulo, the Butantan Institute and the Technological Research Institute of the State of São Paulo, São Paulo, Brazil
- Applied Structural Biology Laboratory, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Otavio Cabral-Marques
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Graduate Program in Pathophysiology and Toxicology, Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
- Department of Medicine, Division of Molecular Medicine, University of São Paulo School of Medicine, São Paulo, Brazil
| | - Gustavo Cabral-Miranda
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
- The Interunits Graduate Program in Biotechnology of the University of São Paulo, the Butantan Institute and the Technological Research Institute of the State of São Paulo, São Paulo, Brazil
- The Graduate Program in Pathophysiology and Toxicology, Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
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Pai HH, Chang CY, Lin KC, Hsu EL. Rapid insecticide resistance bioassays for three major urban insects in Taiwan. Parasit Vectors 2023; 16:447. [PMID: 38042818 PMCID: PMC10693703 DOI: 10.1186/s13071-023-06055-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 11/13/2023] [Indexed: 12/04/2023] Open
Abstract
BACKGROUND Taiwan's warm and humid climate and dense population provide a suitable environment for the breeding of pests. The three major urban insects in Taiwan are house flies, cockroaches, and mosquitoes. In cases where a disease outbreak or high pest density necessitates chemical control, selecting the most effective insecticide is crucial. The resistance of pests to the selected environmental insecticide must be rapidly assessed to achieve effective chemical control and reduce environmental pollution. METHODS In this study, we evaluated the resistance of various pests, namely, house flies (Musca domestica L.), cockroaches (Blattella germanica L. and Periplaneta americana), and mosquitoes (Aedes aegypti and Ae. albopictus) against 10 commonly used insecticides. Rapid insecticide resistance bioassays were performed using discriminating doses or concentrations of the active ingredients of insecticides. RESULTS Five field strains of M. domestica (L.) are resistant to all 10 commonly used insecticides and exhibit cross- and multiple resistance to four types of pyrethroids and three types of organophosphates, propoxur, fipronil, and imidacloprid. None of the five field strains of P. americana are resistant to any of the tested insecticides, and only one strain of B. germanica (L.) is resistant to permethrin. One strain of Ae. albopictus is resistant to pirimiphos-methyl, whereas five strains of Ae. aegypti exhibit multiple resistance to pyrethroids, organophosphates, and other insecticides. CONCLUSIONS In the event of a disease outbreak or high pest density, rapid insecticide resistance bioassays may be performed using discriminating doses or concentrations to achieve precise and effective chemical control, reduce environmental pollution, and increase control efficacy.
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Affiliation(s)
- Hsiu-Hua Pai
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC).
| | - Chun-Yung Chang
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC)
| | - Kai-Chen Lin
- Department of Kinesiology, Health, and Leisure Studies, National University of Kaohsiung, Kaohsiung, Taiwan (ROC)
| | - Err-Lieh Hsu
- Department of Entomology, National Taiwan University, Taipei, Taiwan (ROC)
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Lu JW, Huang CK, Chen YC, Lee GC, Ho YJ. Virucidal activity of trehalose 6-monolaurate against dengue virus in vitro. Drug Dev Res 2023; 84:1699-1708. [PMID: 37688413 DOI: 10.1002/ddr.22112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 08/05/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023]
Abstract
Dengue fever is an acute febrile disease caused by dengue virus (DENV) infection. Over the past 60 years, DENV has spread throughout tropical regions and currently affects more than 50% of the world's population; however, there are as of yet no effective anti-DENV drugs for clinical treatment. A number of research teams have investigated derivatives of glycolipids as possible agents for the inhibition of DENV. Our objective in this research was to study the antiviral effects of trehalose 6-caprate (TMC), trehalose 6-monolaurate (TML), and trehalose 6-monooleate (TMO), based on reports that the corresponding glycosyl, trehalose, reduces the transmission of Zika virus (ZIKV). We also sought to elucidate the molecular mechanisms underlying inhibition using the RNA isolation and reverse transcription-quantitative polymerase chain reaction, western blot analysis, median tissue culture infectious dose (TCID50 ) assay, and immunofluorescence assay and immunochemistry staining, in vitro. This is the first study to demonstrate the TML-induced inhibition of DENV serotype 2 (DENV-2) in a dose-dependent manner. The inhibitory effects of TML in the pretreated, cotreated, and full-treated groups were confirmed using time of addition assays. We determined that TML restricted viral binding, entry, replication, and release. We also confirmed the efficacy of TML against three clinical isolates of DENV serotypes 1, 3, and 4 (DENV-1, DENV-3, and DENV-4). The findings obtained in this study identify TML as a promising candidate for the development of drugs to treat DENV infection.
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Affiliation(s)
- Jeng-Wei Lu
- Biotech Research and Innovation Centre, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- The Finsen Laboratory, Rigshospitalet/National University Hospital, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Chin-Kai Huang
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan, ROC
- Department of Pharmacy, Tri-Service General Hospital Penghu Branch, National Defense Medical Center, Magong City, Taiwan, ROC
| | - Yen-Chen Chen
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan, ROC
- Institute of Preventive Medicine, National Defense Medical Center, New Taipei, Taiwan, ROC
| | - Guan-Chiun Lee
- School of Life Science, National Taiwan Normal University, Taipei, Taiwan, ROC
| | - Yi-Jung Ho
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan, ROC
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan, ROC
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McCormack CP, Goethals O, Goeyvaerts N, Woot de Trixhe XD, Geluykens P, Borrenberghs D, Ferguson NM, Ackaert O, Dorigatti I. Modelling the impact of JNJ-1802, a first-in-class dengue inhibitor blocking the NS3-NS4B interaction, on in-vitro DENV-2 dynamics. PLoS Comput Biol 2023; 19:e1011662. [PMID: 38055683 PMCID: PMC10699615 DOI: 10.1371/journal.pcbi.1011662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 11/05/2023] [Indexed: 12/08/2023] Open
Abstract
Dengue virus (DENV) is a public health challenge across the tropics and subtropics. Currently, there is no licensed prophylactic or antiviral treatment for dengue. The novel DENV inhibitor JNJ-1802 can significantly reduce viral load in mice and non-human primates. Here, using a mechanistic viral kinetic model calibrated against viral RNA data from experimental in-vitro infection studies, we assess the in-vitro inhibitory effect of JNJ-1802 by characterising infection dynamics of two DENV-2 strains in the absence and presence of different JNJ-1802 concentrations. Viral RNA suppression to below the limit of detection was achieved at concentrations of >1.6 nM, with a median concentration exhibiting 50% of maximal inhibitory effect (IC50) of 1.23x10-02 nM and 1.28x10-02 nM for the DENV-2/RL and DENV-2/16681 strains, respectively. This work provides important insight into the in-vitro inhibitory effect of JNJ-1802 and presents a first step towards a modelling framework to support characterization of viral kinetics and drug effect across different host systems.
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Affiliation(s)
- Clare P. McCormack
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Olivia Goethals
- Janssen Global Public Health, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Nele Goeyvaerts
- Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | | | - Peggy Geluykens
- Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
- Discovery, Charles River Beerse, Beerse, Belgium
| | | | - Neil M. Ferguson
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
| | - Oliver Ackaert
- Janssen Research & Development, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Ilaria Dorigatti
- MRC Centre for Global Infectious Disease Analysis, School of Public Health, Imperial College London, London, United Kingdom
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Boehmler MB, Pruszynski C. Response to An Outbreak of Locally Transmitted Dengue in Key Largo, FL, by The Florida Keys Mosquito Control District. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2023; 39:251-257. [PMID: 38108426 DOI: 10.2987/23-7145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Dengue virus (DENV) is an ever-increasing threat to the residents of South Florida. Seventy-two cases of locally acquired dengue were contracted by residents and visitors of Key Largo, FL, in 2020. The primary vector, Aedes aegypti, has been a large focus of the Florida Keys Mosquito Control District's (FKMCD) control measures for over a decade. This paper recounts the 2020 outbreak of DENV in Key Largo, FL, and the FKMCD's Ae. aegypti operational response. The overall House Index (13.43%) during the outbreak was considered high (>5%) risk for local transmission. Larval habitat characterized from property inspections was similar to previous larval (τ = 0.78, P < 0.005) and pupal (τ = 0.745, P < 0.005) habitat studies. Adult surveillance of the active dengue transmission area provided 3 positive pools out of 1,518 mosquitoes tested resulting in a minimum infection rate of 1.976. Increased personnel response with long-term larvicide formulations and increased aerial, truck, and handheld ultra-low-volume adulticide control measures quickly reduced the Ae. aegypti surveillance numbers below the action threshold. No active cases of dengue have been reported since October 2020.
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Agbodzi B, Sado Yousseu FB, Nemg Simo FB, Kumordjie S, Yeboah C, Mosore MT, Bentil RE, Coatsworth HG, Attram N, Nimo-Paintsil S, Fox AT, Bonney JHK, Ampofo W, Dinglasan RR, Sanders T, Wiley MR, Demanou M, Letizia AG. Whole genome sequencing of outbreak strains from 2017 to 2018 reveals an endemic clade of dengue 1 virus in Cameroon. Emerg Microbes Infect 2023; 12:2281352. [PMID: 37933502 PMCID: PMC10732222 DOI: 10.1080/22221751.2023.2281352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 11/04/2023] [Indexed: 11/08/2023]
Abstract
Dengue fever is expanding as a global public health threat including countries within Africa. For the past few decades, Cameroon has experienced sporadic cases of arboviral infections including dengue fever. Here, we conducted genomic analyses to investigate the origin and phylogenetic profile of Cameroon DENV-1 outbreak strains and predict the impact of emerging therapeutics on these strains. Bayesian and maximum-likelihood phylogenetic inference approaches were employed in virus evolutionary analyses. An in silico analysis was performed to assess the divergence in immunotherapeutic and vaccine targets in the new genomes. Six complete DENV-1 genomes were generated from 50 samples that met a clinical definition for DENV infection. Phylogenetic analyses revealed that the strains from the current study belong to a sub-lineage of DENV-1 genotype V and form a monophyletic taxon with a 2012 strain from Gabon. The most recent common ancestor (TMRCA) of the Cameroon and Gabon strains was estimated to have existed around 2008. Comparing our sequences to the vaccine strains, 19 and 15 amino acid (aa) substitutions were observed in the immuno-protective prM-E protein segments of the Dengvaxia® and TetraVax-DV-TV003 vaccines, respectively. Epitope mapping revealed mismatches in aa residues at positions E155 and E161 located in the epitope of the human anti-DENV-1 monoclonal antibody HMAb 1F4. The new DENV strains constitute a conserved genomic pool of viruses endemic to the Central African region that needs prospective monitoring to track local viral evolution. Further work is needed to ascertain the performance of emerging therapeutics in DENV strains from the African region.
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Affiliation(s)
- Bright Agbodzi
- U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
| | | | | | | | - Clara Yeboah
- U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
| | | | | | - Heather G. Coatsworth
- Department of Infectious Diseases & Immunology and Emerging Pathogens Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Naiki Attram
- U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
| | | | - Anne T. Fox
- U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
| | - Joseph H. K. Bonney
- Virology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - William Ampofo
- Virology Department, Noguchi Memorial Institute for Medical Research, University of Ghana, Accra, Ghana
| | - Rhoel R. Dinglasan
- Department of Infectious Diseases & Immunology and Emerging Pathogens Institute, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Terrel Sanders
- U.S. Naval Medical Research Unit EURAFCENT, Accra, Ghana
| | - Michael R. Wiley
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
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Idrus NL, Md Jamal S, Abu Bakar A, Embong H, Ahmad NS. Comparison of clinical and laboratory characteristics between severe and non-severe dengue in paediatrics. PLoS Negl Trop Dis 2023; 17:e0011839. [PMID: 38113250 PMCID: PMC10763952 DOI: 10.1371/journal.pntd.0011839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 01/03/2024] [Accepted: 12/04/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND The timely identification of severe dengue in peadiatric patients is of utmost importance, as any delay in diagnosis could lead to an irreversible state of shock potentially leading to fatal consequences. The primary aim of our study was to characterize dengue severity in paediatric patients based on initial symptoms, signs, and laboratory investigation of their presentation in the emergency department. METHODOLOGY We conducted a retrospective data retrieval from the medical records of 254 paediatric patients who had been diagnosed with confirmed cases of dengue fever. The clinical characteristics were compared between severe and non-severe dengue. Multiple logistic regression analysis was utilised to elucidate the variables that exhibited associations with severe dengue. RESULTS A total of 254 paediatric patients were included, among whom 15.4% (n = 39) were diagnosed with severe dengue. Multiple logistic regression analysis identified lethargy, systolic blood pressure (SBP) below 90 mmHg, capillary refilled time (CRT) longer than 2 seconds, ascites, and hepatomegaly were independently associated with severe dengue. CONCLUSION In paediatric patients, severe dengue is associated with specific clinical indicators, including lethargy, low systolic blood pressure, prolonged capillary refill time (CRT), and the presence of ascites and hepatomegaly. Identifying these clinical features early is crucial for primary care physicians, as it enables accurate diagnosis and timely intervention to manage severe dengue effectively.
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Affiliation(s)
- Nurul Liyana Idrus
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
- Emergency and Trauma Department, Hospital Bukit Mertajam, Jalan Kulim, Bukit Mertajam, Pulau Pinang, Malaysia
| | - Shamsuriani Md Jamal
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
| | - Afliza Abu Bakar
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
| | - Hashim Embong
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
| | - Nurul Saadah Ahmad
- Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, Cheras, Kuala Lumpur, Malaysia
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50
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Rey-Cadilhac F, Rachenne F, Missé D, Pompon J. Viral Components Trafficking with(in) Extracellular Vesicles. Viruses 2023; 15:2333. [PMID: 38140574 PMCID: PMC10747788 DOI: 10.3390/v15122333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 11/25/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023] Open
Abstract
The global public health burden exerted by viruses partially stems from viruses' ability to subdue host cells into creating an environment that promotes their multiplication (i.e., pro-viral). It has been discovered that viruses alter cell physiology by transferring viral material through extracellular vesicles (EVs), which serve as vehicles for intercellular communication. Here, we aim to provide a conceptual framework of all possible EV-virus associations and their resulting functions in infection output. First, we describe the different viral materials potentially associated with EVs by reporting that EVs can harbor entire virions, viral proteins and viral nucleic acids. We also delineate the different mechanisms underlying the internalization of these viral components into EVs. Second, we describe the potential fate of EV-associated viral material cargo by detailing how EV can circulate and target a naive cell once secreted. Finally, we itemize the different pro-viral strategies resulting from EV associations as the Trojan horse strategy, an alternative mode of viral transmission, an expansion of viral cellular tropism, a pre-emptive alteration of host cell physiology and an immunity decoy. With this conceptual overview, we aim to stimulate research on EV-virus interactions.
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Affiliation(s)
- Félix Rey-Cadilhac
- MIVEGEC, Université de Montpellier, IRD, CNRS, 34394 Montpellier, France; (F.R.-C.); (F.R.); (D.M.)
- Faculty of Science, Université de Montpellier, 34095 Montpellier, France
| | - Florian Rachenne
- MIVEGEC, Université de Montpellier, IRD, CNRS, 34394 Montpellier, France; (F.R.-C.); (F.R.); (D.M.)
- Faculty of Science, Université de Montpellier, 34095 Montpellier, France
| | - Dorothée Missé
- MIVEGEC, Université de Montpellier, IRD, CNRS, 34394 Montpellier, France; (F.R.-C.); (F.R.); (D.M.)
| | - Julien Pompon
- MIVEGEC, Université de Montpellier, IRD, CNRS, 34394 Montpellier, France; (F.R.-C.); (F.R.); (D.M.)
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