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Al-Osaimi HM, Kanan M, Marghlani L, Al-Rowaili B, Albalawi R, Saad A, Alasmari S, Althobaiti K, Alhulaili Z, Alanzi A, Alqarni R, Alsofiyani R, Shrwani R. A systematic review on malaria and dengue vaccines for the effective management of these mosquito borne diseases: Improving public health. Hum Vaccin Immunother 2024; 20:2337985. [PMID: 38602074 PMCID: PMC11017952 DOI: 10.1080/21645515.2024.2337985] [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: 02/17/2024] [Accepted: 03/28/2024] [Indexed: 04/12/2024] Open
Abstract
Insect vector-borne diseases (VBDs) pose significant global health challenges, particularly in tropical and subtropical regions. The WHO has launched the "Global Vector Control Response (GVCR) 2017-2030" to address these diseases, emphasizing a comprehensive approach to vector control. This systematic review investigates the potential of malaria and dengue vaccines in controlling mosquito-borne VBDs, aiming to alleviate disease burdens and enhance public health. Following PRISMA 2020 guidelines, the review incorporated 39 new studies out of 934 identified records. It encompasses various studies assessing malaria and dengue vaccines, emphasizing the significance of vaccination as a preventive measure. The findings indicate variations in vaccine efficacy, duration of protection, and safety considerations for each disease, influencing public health strategies. The review underscores the urgent need for vaccines to combat the increasing burden of VBDs like malaria and dengue, advocating for ongoing research and investment in vaccine development.
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Affiliation(s)
- Hind M. Al-Osaimi
- Department of Pharmacy Services Administration, King Fahad Medical City, Riyadh Second Health Cluster, Riyadh, Kingdom of Saudi Arabia
| | - Mohammed Kanan
- Department of Clinical Pharmacy, King Fahad Medical City, Riyadh, Kingdom of Saudi Arabia
| | - Lujain Marghlani
- Department of Medicine, King Saud bin Abdulaziz University for Health Sciences, Riyadh, Kingdom of Saudi Arabia
| | - Badria Al-Rowaili
- Pharmaceutical Services Department, Northern Area Armed Forces Hospital, King Khalid Military, Hafr Al Batin, Kingdom of Saudi Arabia
| | - Reem Albalawi
- Department of Medicine, Tabuk University, Tabuk, Kingdom of Saudi Arabia
| | - Abrar Saad
- Pharmacy Department, Royal Commission Hospital, Yanbu, Kingdom of Saudi Arabia
| | - Saba Alasmari
- Department of Clinical Pharmacy, King Khalid University, Jeddah, Kingdom of Saudi Arabia
| | - Khaled Althobaiti
- Department of Medicine, Taif University, Ta’if, Kingdom of Saudi Arabia
| | - Zainab Alhulaili
- Department of Clinical Pharmacy, Dammam Medical Complex, Dammam, Kingdom of Saudi Arabia
| | - Abeer Alanzi
- Department of Medicine, King Abdulaziz Hospital, Makkah, Kingdom of Saudi Arabia
| | - Rawan Alqarni
- Department of Medicine and Surgery, King Khalid University, Abha, Kingdom of Saudi Arabia
| | - Razan Alsofiyani
- Department of Medicine, Taif University, Ta’if, Kingdom of Saudi Arabia
| | - Reem Shrwani
- Department of Clinical Pharmacy, Jazan University, Jazan, Kingdom of Saudi Arabia
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Chen GH, Dai YC, Hsieh SC, Tsai JJ, Sy AK, Jiz M, Pedroso C, Brites C, Netto EM, Kanki PJ, Saunders DRD, Vanlandingham DL, Higgs S, Huang YJS, Wang WK. Detection of anti-premembrane antibody as a specific marker of four flavivirus serocomplexes and its application to serosurveillance in endemic regions. Emerg Microbes Infect 2024; 13:2301666. [PMID: 38163752 PMCID: PMC10810658 DOI: 10.1080/22221751.2023.2301666] [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: 09/22/2023] [Accepted: 12/30/2023] [Indexed: 01/03/2024]
Abstract
In the past few decades, several emerging/re-emerging mosquito-borne flaviviruses have resulted in disease outbreaks of public health concern in the tropics and subtropics. Due to cross-reactivities of antibodies recognizing the envelope protein of different flaviviruses, serosurveillance remains a challenge. Previously we reported that anti-premembrane (prM) antibody can discriminate between three flavivirus infections by Western blot analysis. In this study, we aimed to develop a serological assay that can discriminate infection or exposure with flaviviruses from four serocomplexes, including dengue (DENV), Zika (ZIKV), West Nile (WNV) and yellow fever (YFV) viruses, and explore its application for serosurveillance in flavivirus-endemic countries. We employed Western blot analysis including antigens of six flaviviruses (DENV1, 2 and 4, WNV, ZIKV and YFV) from four serocomplexes. We tested serum samples from YF-17D vaccinees, and from DENV, ZIKV and WNV panels that had been confirmed by RT-PCR or by neutralization assays. The overall sensitivity/specificity of anti-prM antibodies for DENV, ZIKV, WNV, and YFV infections/exposure were 91.7%/96.4%, 91.7%/99.2%, 88.9%/98.3%, and 91.3%/92.5%, respectively. When testing 48 samples from Brazil, we identified multiple flavivirus infections/exposure including DENV and ZIKV, DENV and YFV, and DENV, ZIKV and YFV. When testing 50 samples from the Philippines, we detected DENV, ZIKV, and DENV and ZIKV infections with a ZIKV seroprevalence rate of 10%, which was consistent with reports of low-level circulation of ZIKV in Asia. Together, these findings suggest that anti-prM antibody is a flavivirus serocomplex-specific marker and can be employed to delineate four flavivirus infections/exposure in regions where multiple flaviviruses co-circulate.
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Affiliation(s)
- Guan-Hua Chen
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Yu-Ching Dai
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Szu-Chia Hsieh
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Jih-Jin Tsai
- Tropical Medicine Center, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Division of Infectious Diseases, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- School of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Ava Kristy Sy
- National Reference Laboratory for Dengue and Other Arbovirus, Virology Department, Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - Mario Jiz
- Immunology Department, Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - Celia Pedroso
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Carlos Brites
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Eduardo Martins Netto
- LAPI-Laboratório de Pesquisa em Infectologia-School of Medicine, Federal University of Bahia, Salvador, Brazil
| | - Phyllis J. Kanki
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | | | - Dana L. Vanlandingham
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Stephen Higgs
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Yan-Jang S. Huang
- Biosecurity Research Institute and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS, USA
| | - Wei-Kung Wang
- Department of Tropical Medicine, Medical Microbiology and Pharmacology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, USA
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3
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Ly H. Dengue fever in the Americas. Virulence 2024; 15:2375551. [PMID: 38989831 PMCID: PMC11244333 DOI: 10.1080/21505594.2024.2375551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Accepted: 06/27/2024] [Indexed: 07/12/2024] Open
Affiliation(s)
- Hinh Ly
- Department of Veterinary & Biomedical Sciences, College of Veterinary Medicine, University of Minnesota, Twin Cities, MN, USA
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Agrawal T, Siddqui G, Dahiya R, Patidar A, Madan U, Das S, Asthana S, Samal S, Awasthi A. Inhibition of early RNA replication in Chikungunya and Dengue virus by lycorine: In vitro and in silico studies. Biochem Biophys Res Commun 2024; 730:150393. [PMID: 39003865 DOI: 10.1016/j.bbrc.2024.150393] [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: 05/23/2024] [Revised: 07/05/2024] [Accepted: 07/10/2024] [Indexed: 07/16/2024]
Abstract
Arboviruses such as chikungunya virus (CHIKV) and dengue virus (DENV) collectively afflict millions of individuals worldwide particularly in endemic countries like India, leading to substantial morbidity and mortality. With the lack of effective vaccines for both CHIKV and DENV in India, the search for antiviral compounds becomes paramount to control these viral infections. In line with this, our investigation was focused on screening natural compounds for their potential antiviral activity against CHIKV and DENV. Using different assays, including plaque assay, immunofluorescence, and reverse transcription-quantitative real-time PCR (qRT-PCR), out of 109 natural compounds tested, we confirmed lycorine's in vitro antiviral activity against CHIKV and DENV at low micromolar concentrations in different cell types. Time of addition assays indicated that lycorine does not impede viral entry. Additionally, qRT-PCR results along with time of addition assay suggested that lycorine interferes with the synthesis of negative strand viral RNA. Molecular docking analysis was done to understand the mode of inhibition of viral replication. The results revealed that the most likely binding site with the highest binding affinity of lycorine, was at the palm and finger domains, in the vicinity of the catalytic site of CHIKV and DENV RNA-dependent RNA polymerase (RdRp). Collectively, our data underscores the potential of lycorine to be developed as a direct acting inhibitor for DENV and CHIKV, addressing the critical need of requirement of an antiviral in regions where these viruses pose significant public health threats.
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Affiliation(s)
- Tanvi Agrawal
- Centre for Immunobiology and Immunotherapy, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India; Centre for Virus Research, Therapeutics and Vaccines, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India.
| | - Gazala Siddqui
- Centre for Virus Research, Therapeutics and Vaccines, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Ridhima Dahiya
- Computational Biophysics and CADD Group, Computational and Mathematical Biology Centre (CMBC), Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Aanchal Patidar
- Centre for Immunobiology and Immunotherapy, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Upasna Madan
- Centre for Immunobiology and Immunotherapy, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Supratik Das
- Centre for Virus Research, Therapeutics and Vaccines, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Shailendra Asthana
- Computational Biophysics and CADD Group, Computational and Mathematical Biology Centre (CMBC), Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Sweety Samal
- Centre for Virus Research, Therapeutics and Vaccines, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India
| | - Amit Awasthi
- Centre for Immunobiology and Immunotherapy, Translational Health Science and Technology Institute, NCR-Biotech Science Cluster, 3rd Milestone, Faridabad, 121001, Haryana, India.
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5
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Balingit JC, Denis D, Suzuki R, Hayati RF, Ngwe Tun MM, Takamatsu Y, Masyeni S, Sasmono RT, Morita K. Impact of pre-existing cross-reactive antibodies on cyclic dengue outbreaks in the hyperendemic region of Bali, Indonesia. Virus Res 2024; 348:199445. [PMID: 39089369 PMCID: PMC11342788 DOI: 10.1016/j.virusres.2024.199445] [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: 05/10/2024] [Revised: 07/24/2024] [Accepted: 07/29/2024] [Indexed: 08/03/2024]
Abstract
The four serotypes of the dengue virus (DENV) cause a range of diseases ranging from mild fever to severe conditions. Understanding the immunological interactions among the four serotypes is crucial in comprehending the dynamics of serotype shifting during outbreaks in areas where all four serotypes co-circulate. Hence, we evaluated the neutralizing antibody and antibody-dependent enhancement responses against the four DENV serotypes using acute-phase plasma samples collected from 48 laboratory-confirmed dengue patients during a dengue outbreak in Bali, Indonesia in 2022. Employing single-round infectious particles to exclusively investigate immunogenicity to the structural surface proteins of DENV, which are the targets of antibodies, we found that individuals with a probable prior history of DENV-1 infection exhibited increased susceptibility to secondary DENV-3 infection, attributed to cross-reactive antibodies with limited neutralizing activity against DENV-3 (geometric mean 50 % neutralization titer (GMNT50) = 47.6 ± 11.5). This susceptibility was evident in vitro, with a mean fold enhancement of 28.4 ± 33.9. Neutralization titers against DENV-3 were significantly lower compared to other serotypes (DENV-1 GMNT50 = 678.1 ± 9.0; DENV-2 GMNT50 = 210.5 ± 8.7; DENV-4 GMNT50 = 95.14 ± 7.0). We demonstrate that prior immunity to one serotype provides limited cross-protection against the other serotypes, influencing the dominant serotype in subsequent outbreaks. These findings underscore the complexity of dengue immunity and its implications for vaccine design and transmission dynamics in hyperendemic regions.
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Affiliation(s)
- Jean Claude Balingit
- Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan
| | | | - Ryosuke Suzuki
- Department of Virology II, National Institute of Infectious Diseases, Tokyo 208-0011, Japan
| | | | - Mya Myat Ngwe Tun
- Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan; Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan; Center for Vaccines and Therapeutic Antibodies for Emerging Infectious Diseases, Shimane University, Izumo 690-8504, Japan
| | - Yuki Takamatsu
- Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan; Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan
| | - Sri Masyeni
- Department of Internal Medicine, Faculty of Medicine and Health Science, Universitas Warmadewa, Bali 80239, Indonesia
| | - R Tedjo Sasmono
- Eijkman Research Center for Molecular Biology, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia
| | - Kouichi Morita
- Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan; Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 852-8523, Japan; DEJIMA Infectious Disease Research Alliance, Nagasaki University, Nagasaki 852-8523, Japan.
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6
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Rabiu I, Musa HA, Isaiah Z, Hussaini M, Umar MM, Mustapha S, Abdullahi JI, Shehu A, Sani MA. Dengue outbreaks in northern Nigeria: Evaluating the recommended Takeda vaccine and future prevention strategies. World J Virol 2024; 13:95555. [DOI: 10.5501/wjv.v13.i3.95555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 06/05/2024] [Accepted: 07/01/2024] [Indexed: 08/29/2024] Open
Abstract
Dengue fever, caused by the dengue virus (DENV), poses a significant public health challenge globally, with Nigeria experiencing sporadic outbreaks. A clear understanding of the dengue burden has not been achieved in Nigeria, just as in other African countries. Understanding the epidemiology and burden of dengue fever is essential for effective prevention and control strategies. This paper examines the recent dengue outbreaks in northern Nigeria, particularly in Sokoto state, and evaluates the recommended Takeda dengue vaccine (TDV) along with future prevention strategies. Despite limited surveillance and underreporting, dengue fever is endemic in Nigeria (with over 5 million cases and 5000 dengue-related deaths in 2023), with recent outbreaks indicating a growing concern. The TDV, a live attenuated tetravalent vaccine, has shown promise in preventing dengue fever, but challenges such as vaccine acceptance and accessibility need to be addressed. Global urbanization contributes to the disease's spread, which is influenced by factors such as population density, cultural beliefs, water storage practices, hygiene, and water supply accessibility. Future prevention strategies must focus on government intervention, community practices, and innovative vector control measures to mitigate the spread of DENV in Nigeria. This study will serve as a valuable reference for policymakers, researchers, and clinicians in the management and control of DENV in Nigeria and Africa as a whole.
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Affiliation(s)
- Ismail Rabiu
- College of Life Science, Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Hafsat Abubakar Musa
- Department of Microbiology, Faculty of Life Science, Bayero University Kano, Kano 700006, Kano State, Nigeria
| | - Zephaniah Isaiah
- Department of Microbiology, Faculty of Life Science, Bayero University Kano, Kano 700006, Kano State, Nigeria
| | - Mujahid Hussaini
- Department of Microbiology, Umaru Musa Yar’adua University, Katsina 820102, Katsina State, Nigeria
| | - Muhammad Muhsin Umar
- Department of Microbiology, Faculty of Life Science, Bayero University Kano, Kano 700006, Kano State, Nigeria
| | - Suleiman Mustapha
- Department of Microbiology, Faculty of Science, Kaduna State University, Tafawa Balewa Way 800283, Kaduna State, Nigeria
| | - Jaafaru Isah Abdullahi
- Department of Microbiology, Faculty of Science, Kaduna State University, Tafawa Balewa Way 800283, Kaduna State, Nigeria
| | - Aminu Shehu
- Department of Microbiology, Faculty of Life Science, Bayero University Kano, Kano 700006, Kano State, Nigeria
- National Reference Laboratory, Nigeria Center for Disease Control, Gaduwa 900231, Abuja, Nigeria
| | - Mariya Abdullahi Sani
- Department of Microbiology and Biotechnology, Federal University, Dutse 720223, Jigawa State, Nigeria
- Monitoring and Evaluation Unit (Jigawa State Office), World Health Organization, Dutse 720223, Jigawa State, Nigeria
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7
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Nyathi S, Rezende IM, Walter KS, Thongsripong P, Mutuku F, Ndenga B, Mbakaya JO, Aswani P, Musunzaji PS, Chebii PK, Maina PW, Mutuku PS, Ng'ang'a CM, Malumbo SL, Jembe Z, Vu DM, Mordecai EA, Bennett S, Andrews JR, LaBeaud AD. Molecular epidemiology and evolutionary characteristics of dengue virus 2 in East Africa. Nat Commun 2024; 15:7832. [PMID: 39244569 DOI: 10.1038/s41467-024-51018-0] [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: 05/11/2023] [Accepted: 07/25/2024] [Indexed: 09/09/2024] Open
Abstract
Despite the increasing burden of dengue, the regional emergence of the virus in Kenya has not been examined. This study investigates the genetic structure and regional spread of dengue virus-2 in Kenya. Viral RNA from acutely ill patients in Kenya was enriched and sequenced. Six new dengue-2 genomes were combined with 349 publicly available genomes and phylogenies used to infer gene flow between Kenya and other countries. Analyses indicate two dengue-2 Cosmopolitan genotype lineages circulating in Kenya, linked to recent outbreaks in coastal Kenya and Burkina Faso. Lineages circulating in Western, Southern, and Eastern Africa exhibiting similar evolutionary features are also reported. Phylogeography suggests importation of dengue-2 into Kenya from East and Southeast Asia and bidirectional geneflow. Additional lineages circulating in Africa are also imported from East and Southeast Asia. These findings underscore how intermittent importations from East and Southeast Asia drive dengue-2 circulation in Kenya and Africa more broadly.
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Affiliation(s)
- Sindiso Nyathi
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, CA, 94305, USA.
| | - Izabela M Rezende
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Katharine S Walter
- Division of Epidemiology, Department of Internal Medicine, University of Utah School of Medicine, University of Utah, Salt Lake City, UT, 84132, USA
| | - Panpim Thongsripong
- Florida Medical Entomology Laboratory, University of Florida, Vero Beach, FL, 32962, USA
| | - Francis Mutuku
- Department of Environment and Health Sciences, Technical University of Mombasa, Mombasa, Kenya
| | - Bryson Ndenga
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Joel O Mbakaya
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Peter Aswani
- Centre for Global Health Research, Kenya Medical Research Institute, Kisumu, Kenya
| | | | - Philip K Chebii
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - Paul S Mutuku
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - Said L Malumbo
- Vector-borne Disease Unit, Msambweni Hospital, Msambweni, Kenya
| | | | - David M Vu
- Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, Stanford University, Stanford, CA, 94305, USA
| | - Erin A Mordecai
- Department of Biology, Stanford University, Stanford, CA, 94305, USA
| | - Shannon Bennett
- Department of Microbiology, California Academy of Sciences, 55 Music Concourse Drive, San Francisco, CA, 94118, USA
| | - Jason R Andrews
- Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - A Desiree LaBeaud
- Department of Pediatrics, Division of Infectious Diseases, Stanford University School of Medicine, Stanford University, Stanford, CA, 94305, USA
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Petri E, Biswal S, Lloyd E, Tricou V, Folschweiller N. Early onset of protection of the TAK-003 dengue vaccine: Data from the DEN-301 clinical trial. Vaccine 2024:126309. [PMID: 39244427 DOI: 10.1016/j.vaccine.2024.126309] [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: 06/07/2024] [Revised: 08/16/2024] [Accepted: 08/29/2024] [Indexed: 09/09/2024]
Abstract
Exploring time-to-onset of efficacy of the live-attenuated dengue vaccine TAK-003 is important for individuals living in, or traveling to, dengue-endemic areas. This protocol-defined exploratory analysis of the Tetravalent Immunization against Dengue Efficacy Study (TIDES) investigated TAK-003's onset of efficacy after the first and before the second dose, administered 3 months later, in healthy participants aged 4-16 years randomly assigned 2:1 to receive TAK-003 or placebo. The number of virologically confirmed dengue (VCD) cases between first and second vaccinations and the time-to-onset of vaccine efficacy (VE) were assessed in the safety population. Fifty VCD cases occurred between the first and second doses (placebo = 37, TAK-003 = 13). The VE against VCD up to 3 months after the first dose was 82.1 %, with an estimated time-to-onset of ∼14 days. TAK-003 provides rapid onset of protection after the first dose and may be useful in the context of a dengue outbreak or as a travel vaccine.
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Affiliation(s)
- Eckhardt Petri
- Takeda Pharmaceuticals International AG, Zurich, Switzerland.
| | | | - Eric Lloyd
- Takeda Vaccines, Inc., Cambridge, MA, USA
| | - Vianney Tricou
- Takeda Pharmaceuticals International AG, Zurich, Switzerland
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9
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Dayarathna S, Senadheera B, Jeewandara C, Dissanayake M, Bary F, Ogg GS, Malavige GN. Dengue NS1 interaction with lipids alters its pathogenic effects on monocyte derived macrophages. J Biomed Sci 2024; 31:86. [PMID: 39232783 PMCID: PMC11373103 DOI: 10.1186/s12929-024-01077-8] [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: 05/27/2024] [Accepted: 08/21/2024] [Indexed: 09/06/2024] Open
Abstract
BACKGROUND While dengue NS1 antigen has been shown to be associated with disease pathogenesis in some studies, it has not been linked in other studies, with the reasons remaining unclear. NS1 antigen levels in acute dengue are often associated with increased disease severity, but there has been a wide variation in results based on past dengue infection and infecting dengue virus (DENV) serotype. As NS1 engages with many host lipids, we hypothesize that the type of NS1-lipid interactions alters its pathogenicity. METHODS Primary human monocyte derived macrophages (MDMs) were co-cultured with NS1 alone or with HDL, LDL, LPS and/or platelet activating factor (PAF) from individuals with a history of past dengue fever (DF = 8) or dengue haemorrhagic fever (DHF = 8). IL-1β levels were measured in culture supernatants, and gene expression analysis carried out in MDMs. Monocyte subpopulations were assessed by flow cytometry. Hierarchical cluster analysis with Euclidean distance calculations were used to differentiate clusters. Differentially expressed variables were extracted and a classifier model was developed to differentiate between past DF and DHF. RESULTS Significantly higher levels of IL-1β were seen in culture supernatants when NS1 was co-cultured with LDL (p = 0.01, median = 45.69 pg/ml), but lower levels when NS1 was co-cultured with HDL (p = 0.05, median = 4.617 pg/ml). MDMs of those with past DHF produced higher levels of IL-1β when NS1 was co-cultured with PAF (p = 0.02). MDMs of individuals with past DHF, were significantly more likely to down-regulate RPLP2 gene expression when macrophages were co-cultured with either PAF alone, or NS1 combined with PAF, or NS1 combined with LDL. When NS1 was co-cultured with PAF, HDL or LDL two clusters were detected based on IL10 expression, but these did not differentiate those with past DF or DHF. CONCLUSIONS As RPLP2 is important in DENV replication, regulating cellular stress responses and immune responses and IL-10 is associated with severe disease, it would be important to further explore how differential expression of RPLP2 and IL-10 could lead to disease pathogenesis based on NS1 and lipid interactions.
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Affiliation(s)
- Shashika Dayarathna
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Bhagya Senadheera
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Chandima Jeewandara
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Madushika Dissanayake
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Farha Bary
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Graham S Ogg
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Gathsaurie Neelika Malavige
- Allergy Immunology and Cell Biology Unit, Department of Immunology and Molecular Medicine, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka.
- MRC Translational Immune Discovery Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK.
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10
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Jiang T, Huang C, Ruan Q, Huang X, Liang C, Chen Z, Yu X, Peng Y, Liu Z, Cheng G, Dai J, Sun J. Envelope domain III E 324, E 351, and E 380 mutations lever adaptive evolution of DENV-1 genotype I. J Virol 2024:e0118324. [PMID: 39230303 DOI: 10.1128/jvi.01183-24] [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: 07/05/2024] [Accepted: 08/08/2024] [Indexed: 09/05/2024] Open
Abstract
Dengue virus (DENV) gains genetic mutations during continuous transmission and evolution, making the virus more adaptive and virulent. The clade of DENV-1 genotype I has expanded and become the predominant genotype in Asia and the Pacific areas, but the underlying mechanisms are unclear. A combined analysis of nonsynonymous mutations in domain III of the envelope protein and their biological effects on virus pathogenesis and transmission was evaluated. Phylogenetic analyses found three nonsynonymous mutations (V324I, V351L, and V380I) in domain III of the envelope protein, which emerged in 1970s-1990s and stably inherited and expanded in contemporary strains after 2000. We generated reverse-mutated viruses (I324V, L351V, and I380V) based on an infectious clone of an epidemic DENV-1 strain (NIID02-20), and the results suggested that the infectivity of the contemporary epidemic virus (wild type, WT) has increased compared to the reverse mutant viruses in mammalian hosts but not mosquito vectors. The WT virus showed a higher binding affinity to host cells and increased virion stability. In addition, weaker immunogenicity and higher resistance to neutralizing antibodies of the WT virus indicated a trend of immune escape. The data suggested that nonsynonymous mutations of the E protein (V324I, V351L, and V380I) promote infectivity and immune evasion of DENV-1 genotype I, which may facilitate its onward transmission on a global scale. IMPORTANCE We provide evidence that minor sequence variation among dengue virus (DENV) strains can result in increased adaptability and virulence, impacting both the biology of the virus and the antiviral immune response. The genetic mutations of DENV-1 gained during continuous transmission and evolution will offer new clues for the design of novel vaccines against flaviviruses.
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Affiliation(s)
- Tao Jiang
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Chenxiao Huang
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Qianqian Ruan
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Xiaorong Huang
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Chumin Liang
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Zhiqiang Chen
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Xi Yu
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Yihao Peng
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, the Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Zheng Liu
- School of Medicine, Kobilka Institute of Innovative Drug Discovery, the Chinese University of Hong Kong (Shenzhen), Shenzhen, China
| | - Gong Cheng
- Tsinghua-Peking Center for Life Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Jianfeng Dai
- Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
- MOE Key Laboratory of Geriatric Diseases and Immunology, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Jiufeng Sun
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
- School of Public Health, Nanfang Medical University, Guangzhou, China
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, China
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11
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Brook CE, Rozins C, Bohl JA, Ahyong V, Chea S, Fahsbender L, Huy R, Lay S, Leang R, Li Y, Lon C, Man S, Oum M, Northrup GR, Oliveira F, Pacheco AR, Parker DM, Young K, Boots M, Tato CM, DeRisi JL, Yek C, Manning JE. Climate, demography, immunology, and virology combine to drive two decades of dengue virus dynamics in Cambodia. Proc Natl Acad Sci U S A 2024; 121:e2318704121. [PMID: 39190356 DOI: 10.1073/pnas.2318704121] [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: 11/03/2023] [Accepted: 07/31/2024] [Indexed: 08/28/2024] Open
Abstract
The incidence of dengue virus disease has increased globally across the past half-century, with highest number of cases ever reported in 2019 and again in 2023. We analyzed climatological, epidemiological, and phylogenomic data to investigate drivers of two decades of dengue in Cambodia, an understudied endemic setting. Using epidemiological models fit to a 19-y dataset, we first demonstrate that climate-driven transmission alone is insufficient to explain three epidemics across the time series. We then use wavelet decomposition to highlight enhanced annual and multiannual synchronicity in dengue cycles between provinces in epidemic years, suggesting a role for climate in homogenizing dynamics across space and time. Assuming reported cases correspond to symptomatic secondary infections, we next use an age-structured catalytic model to estimate a declining force of infection for dengue through time, which elevates the mean age of reported cases in Cambodia. Reported cases in >70-y-old individuals in the 2019 epidemic are best explained when also allowing for waning multitypic immunity and repeat symptomatic infections in older patients. We support this work with phylogenetic analysis of 192 dengue virus (DENV) genomes that we sequenced between 2019 and 2022, which document emergence of DENV-2 Cosmopolitan Genotype-II into Cambodia. This lineage demonstrates phylogenetic homogeneity across wide geographic areas, consistent with invasion behavior and in contrast to high phylogenetic diversity exhibited by endemic DENV-1. Finally, we simulate an age-structured, mechanistic model of dengue dynamics to demonstrate how expansion of an antigenically distinct lineage that evades preexisting multitypic immunity effectively reproduces the older-age infections witnessed in our data.
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Affiliation(s)
- Cara E Brook
- Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637
| | - Carly Rozins
- Department of Science, Technology, and Society, York University, Toronto, ON M3J 1P3, Canada
| | - Jennifer A Bohl
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20892
| | - Vida Ahyong
- Chan Zuckerberg Biohub, San Francisco, CA 94158
| | - Sophana Chea
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | | | - Rekol Huy
- National Center for Parasitology, Entomology, and Malaria Control, Phnom Penh 120801, Cambodia
| | - Sreyngim Lay
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | - Rithea Leang
- National Center for Parasitology, Entomology, and Malaria Control, Phnom Penh 120801, Cambodia
| | - Yimei Li
- Department of Ecology and Evolution, University of Chicago, Chicago, IL 60637
| | - Chanthap Lon
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | - Somnang Man
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
- National Center for Parasitology, Entomology, and Malaria Control, Phnom Penh 120801, Cambodia
| | - Mengheng Oum
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | - Graham R Northrup
- Center for Computational Biology, University of California, Berkeley, CA 94720
| | - Fabiano Oliveira
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20892
| | - Andrea R Pacheco
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | - Daniel M Parker
- Department of Population Health and Disease Prevention, University of California, Irvine, CA 92697
- Department of Epidemiology and Biostatistics, University of California, Irvine, CA 92697
| | - Katherine Young
- Department of Biological Sciences, University of Texas, El Paso, TX 79968
| | - Michael Boots
- Department of Integrative Biology, University of California, Berkeley, CA 94720
| | | | | | - Christina Yek
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20892
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
| | - Jessica E Manning
- Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20892
- International Center of Excellence in Research, National Institute of Allergy and Infectious Diseases, NIH, Phnom Penh 120801, Cambodia
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12
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Arruda VDO, Filho LRG, Neves AF. Aptamer-associated colorimetric reverse transcription loop-mediated isothermal amplification assay for detection of dengue virus. Microbiol Spectr 2024; 12:e0358323. [PMID: 39046260 PMCID: PMC11370242 DOI: 10.1128/spectrum.03583-23] [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] [Accepted: 04/21/2024] [Indexed: 07/25/2024] Open
Abstract
Current diagnostic methods for dengue, such as serological tests, have limitations in terms of cross-reactivity with other viruses. To address this issue, we explored the potential of combining the loop-mediated isothermal amplification (LAMP) technique with the affinity of aptamers to develop point-of-care testing. In this study, we utilized 60 serum samples. An aptamer capable of binding to the dengue virus was employed as a platform for capturing genetic material, and its performance was compared to a commercial kit. Dengue virus was detected through RT-PCR and colorimetric reverse transcription loop-mediated isothermal amplification (RT-LAMP), allowing visual observation of the results without the need for equipment. In the context of the aptamer LAMP assay, our analysis revealed the detection of the dengue virus in 38 out of 60 samples, with 95% sensitivity and 100% specificity compared to RT-PCR and/or APTA-RT-PCR. Importantly, we observed no cross-reaction when assessing samples positive for the zika virus, underscoring the assay's selectivity. This innovative aptameric capture of the viral RNA in combination with the RT-LAMP (APTA-RT-LAMP) method has the potential to offer valuable molecular insights into neglected infectious diseases in a simpler and faster manner. IMPORTANCE Dengue is a neglected tropical disease of significant epidemiological importance in tropical and subtropical countries. Current diagnostics for this infection present challenges, such as cross-reactivity in serological tests. Finding ways to enhance the diagnosis of this disease is crucial, given the absence of specific treatments. An accurate, simple, and effective diagnosis contributes to the improved management of infected individuals. In this context, our work combines molecular biology techniques, such as isothermal loop amplification, with aptamers to detect the dengue virus in biological samples. Our method produces colorimetric results based on a color change, with outcomes available in less than 2 hours. Moreover, it requires simpler equipment compared to molecular PCR tests.
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13
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Goh VSL, Ang CCW, Low SL, Lee PX, Setoh YX, Wong JCC. Evaluation of three alternative methods to the plaque reduction neutralizing assay for measuring neutralizing antibodies to dengue virus serotype 2. Virol J 2024; 21:208. [PMID: 39227969 PMCID: PMC11373480 DOI: 10.1186/s12985-024-02459-y] [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: 05/11/2024] [Accepted: 08/05/2024] [Indexed: 09/05/2024] Open
Abstract
BACKGROUND Dengue is a global public health challenge which requires accurate diagnostic methods for surveillance and control. The gold standard for detecting dengue neutralizing antibodies (nAbs) is the plaque reduction neutralization test (PRNT), which is both labor-intensive and time-consuming. This study aims to evaluate three alternative approaches, namely, the MTT-based (or (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) microneutralization assay, the xCELLigence real-time cell analysis (RTCA), and the immuno-plaque assay-focus reduction neutralization test (iPA-FRNT). METHODS Twenty-two residual serum samples were tested for DENV-2 nAbs using all four assays at three neutralization endpoints of 50%, 70% and 90% inhibition in virus growth. For each neutralization endpoint, results were compared using linear regression and correlation analyses. Test performance characteristics were further obtained for iPA-FRNT using 38 additional serum samples. RESULTS Positive correlation of DENV-2 neutralization titers for the MTT-based microneutralization assay and the PRNT assay was only observed at the neutralization endpoint of 50% (r = 0.690). In contrast, at all three neutralization end points, a linear trend and positive correlation of DENV-2 neutralization titers for the xCELLigence RTCA and the PRNT assays were observed, yielding strong or very strong correlation (r = 0.829 to 0.967). This was similarly observed for the iPA-FRNT assay (r = 0.821 to 0.916), which also offered the added advantage of measuring neutralizing titers to non-plaque forming viruses. CONCLUSION The xCELLigence RTCA and iPA-FRNT assays could serve as suitable alternatives to PRNT for dengue serological testing. The decision to adopt these methods may depend on the laboratory setting, and the utility of additional applications offered by these technologies.
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Affiliation(s)
- Vanessa Shi Li Goh
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore
| | - Christopher Chong Wei Ang
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore
| | - Swee Ling Low
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore
| | - Pei Xuan Lee
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore
| | - Yin Xiang Setoh
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore
- Infectious Diseases Translational Research Programme (ID TRP), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD, Australia
| | - Judith Chui Ching Wong
- Environmental Health Institute, National Environment Agency (NEA), 11 Biopolis Way, Singapore, Singapore.
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14
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Tu T, Yang J, Xiao H, Zuo Y, Tao X, Ran Y, Yuan Y, Ye S, He Y, Wang Z, Tang W, Liu Q, Ji H, Li Z. Spatiotemporal analysis of imported and local dengue virus and cases in a metropolis in Southwestern China, 2013-2022. Acta Trop 2024; 257:107308. [PMID: 38945422 DOI: 10.1016/j.actatropica.2024.107308] [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: 04/10/2024] [Revised: 06/19/2024] [Accepted: 06/28/2024] [Indexed: 07/02/2024]
Abstract
Dengue fever is a viral illness, mainly transmitted by Aedes aegypti and Aedes albopictus. With climate change and urbanisation, more urbanised areas are becoming suitable for the survival and reproduction of dengue vector, consequently are becoming suitable for dengue transmission in China. Chongqing, a metropolis in southwestern China, has recently been hit by imported and local dengue fever, experiencing its first local outbreak in 2019. However, the genetic evolution dynamics of dengue viruses and the spatiotemporal patterns of imported and local dengue cases have not yet been elucidated. Hence, this study implemented phylogenetic analyses using genomic data of dengue viruses in 2019 and 2023 and a spatiotemporal analysis of dengue cases collected from 2013 to 2022. We sequenced a total of 15 nucleotide sequences of E genes. The dengue viruses formed separate clusters and were genetically related to those from Guangdong Province, China, and countries in Southeast Asia, including Laos, Thailand, Myanmar and Cambodia. Chongqing experienced a dengue outbreak in 2019 when 168 imported and 1,243 local cases were reported, mainly in September and October. Few cases were reported in 2013-2018, and only six were imported from 2020 to 2022 due to the COVID-19 lockdowns. Our findings suggest that dengue prevention in Chongqing should focus on domestic and overseas population mobility, especially in the Yubei and Wanzhou districts, where airports and railway stations are located, and the period between August and October when dengue outbreaks occur in endemic regions. Moreover, continuous vector monitoring should be implemented, especially during August-October, which would be useful for controlling the Aedes mosquitoes. This study is significant for defining Chongqing's appropriate dengue prevention and control strategies.
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Affiliation(s)
- Taotian Tu
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Jing Yang
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Hansen Xiao
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Youyi Zuo
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; School of Soil and Water Conservation, Beijing Forestry University, Beijing, China
| | - Xiaoying Tao
- Shapingba District Center for Disease Control and Prevention, Chongqing, China
| | - Yaling Ran
- Yubei District Center for Disease Control and Prevention, Chongqing, China
| | - Yi Yuan
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Sheng Ye
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Yaming He
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Zheng Wang
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Wenge Tang
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China
| | - Qiyong Liu
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hengqing Ji
- The First Batch of Key Disciplines On Public Health in Chongqing, Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing Center for Disease Control and Prevention, Chongqing, China.
| | - Zhichao Li
- Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
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15
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Singha S, Nath N, Sarma V, Barman K, Sharma GC, Saikia L, Baruah S. Identification of Immunodominant Epitopes of Dengue Virus 2 Envelope and NS1 Proteins: Evaluating the Diagnostic Potential of a Synthetic Peptide. Mol Diagn Ther 2024; 28:633-643. [PMID: 38980575 DOI: 10.1007/s40291-024-00728-8] [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] [Accepted: 06/23/2024] [Indexed: 07/10/2024]
Abstract
BACKGROUND AND OBJECTIVE Dengue is a major infectious disease with potential for outbreaks and epidemics. A specific and sensitive diagnosis is a prerequisite for clinical management of the disease. We designed our study to identify epitopes on the Dengue virus (DENV) envelope (E) and non-structural protein 1 (NS1) with potential for diagnosis. METHODS Serology and immunoinformatic approaches were employed. We collected DENV-positive, DENV-negative and Japanese encephalitis virus-positive samples from collaborating hospitals in 2019 and 2022-2023. Seropositive peptides in 15-18 mer peptide arrays of E and NS1 proteins of DENV2 were determined by an indirect enzyme-linked immunosorbent assay. B-cell linear and conformational epitopes were predicted using BepiPred2.0 and ElliPro, respectively. A consensus recombinant peptide was designed, synthesised and evaluated for its diagnostic potential using patient sera. RESULTS Eight peptides of E protein and six peptides of NS1 protein were identified to be the most frequently recognised by Dengue-positive patients. These peptide sequences were compared with B-cell epitope regions and found to be overlapped with predicted B-cell linear and conformational epitopes. EP11 and NSP15 showed a 100% amino acid sequence overlap with B-cell epitopes. EP1 and NSP15 had 14 whereas EP28, EP31, EP60 16, NSP12 and NSP32 had more than 15 interacting interface residues with a neutralising antibody, suggesting a strength of interaction. Interestingly, potential epitopes identified were localised on the surface of proteins as visualised by PyMOL. Validation with a recombined synthetic peptide yielded 92.3% sensitivity and 91.42% specificity. CONCLUSIONS Immunodominant regions identified by serology and computationally predicted epitopes overlapped, thereby showing the robustness of the methodology and the peptide designed for diagnosis.
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Affiliation(s)
- Sushmita Singha
- Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Sonitpur Assam, 784028, India
| | - Neena Nath
- Gauhati Medical College and Hospital, Bhangagarh, Guwahati, Assam, India
| | - Vaishali Sarma
- Gauhati Medical College and Hospital, Bhangagarh, Guwahati, Assam, India
| | - Kangkana Barman
- Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Sonitpur Assam, 784028, India
| | - Gurumayum Chourajit Sharma
- Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Sonitpur Assam, 784028, India
| | - Lahari Saikia
- Gauhati Medical College and Hospital, Bhangagarh, Guwahati, Assam, India
| | - Shashi Baruah
- Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Sonitpur Assam, 784028, India.
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16
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Abbasher Hussien Mohamed Ahmed K, Abbasher A, Siddig A, Abbasher M, Abbasher AA, Abdelhaleem Omar Ahmed A, Shihab Hamednalla Abdelgader Z, Hassan Salih Elhaj E, Ahsan A, Mustafa Ahmed GE, Hussien A. Rare occurrence of sagittal sinus thrombosis and haemorrhagic infarction with dengue fever: jumping from traditional symptoms to lethal neurological consequences. Ann Med Surg (Lond) 2024; 86:5567-5574. [PMID: 39239038 PMCID: PMC11374276 DOI: 10.1097/ms9.0000000000002406] [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: 04/15/2024] [Accepted: 07/10/2024] [Indexed: 09/07/2024] Open
Abstract
Introduction and importance Dengue virus (DENV) is an RNA virus transmitted by Aides mosquito causing dengue fever. There is growing recognition of neurological symptoms associated with DENV infection, some of which might be lethal if left untreated. Case reports describing sagittal sinus thrombosis, as a serious neurologic consequence of dengue infection, are rare. It is still unknown how often sagittal sinus thrombosis occurs and what variables increase the risk in dengue patients. Case presentation Herein the authors presented an elderly Sudanese patient diagnosed with dengue fever. He was admitted, then 2 days after admission, the condition was complicated by atrial fibrillation, sagittal sinus thrombosis complicated by massive left temporal lobe infarction with haemorrhagic transformation and recurrent episodes of status epilepticus. After receiving the necessary care, his condition remained the same and no progress or deterioration was seen. Clinical discussion Sagittal sinus thrombosis can happen due to several underlying causes. DENV can very rarely lead to such condition. The authors' patient developed this condition, which was later complicated by ischaemic stroke with haemorrhagic transformation and status epilepticus. In addition to a familial history of DVT and a history of myocardial infarction, our patient also acquired cardiac mural thrombus and DVT throughout his illness, which increased the suspicion of a protein C, protein S, or antithrombin 3 deficiency. Conclusion Sagittal sinus thrombosis with haemorrhagic infarction associated with thrombocytopenia is a very rare kind of stroke that occurs in dengue. Dengue as a pathogenic mechanism of ischaemic stroke requires validation with further data.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Areeba Ahsan
- Foundation University School of Health Sciences, Islamabad, Pakistan
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17
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Piersma SJ. Tissue-specific features of innate lymphoid cells in antiviral defense. Cell Mol Immunol 2024; 21:1036-1050. [PMID: 38684766 PMCID: PMC11364677 DOI: 10.1038/s41423-024-01161-x] [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: 12/25/2023] [Accepted: 04/01/2024] [Indexed: 05/02/2024] Open
Abstract
Innate lymphocytes (ILCs) rapidly respond to and protect against invading pathogens and cancer. ILCs include natural killer (NK) cells, ILC1s, ILC2s, ILC3s, and lymphoid tissue inducer (LTi) cells and include type I, type II, and type III immune cells. While NK cells have been well recognized for their role in antiviral immunity, other ILC subtypes are emerging as players in antiviral defense. Each ILC subset has specialized functions that uniquely impact the antiviral immunity and health of the host depending on the tissue microenvironment. This review focuses on the specialized functions of each ILC subtype and their roles in antiviral immune responses across tissues. Several viruses within infection-prone tissues will be highlighted to provide an overview of the extent of the ILC immunity within tissues and emphasize common versus virus-specific responses.
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Affiliation(s)
- Sytse J Piersma
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, 63110, USA.
- Siteman Cancer Center, Washington University School of Medicine, St. Louis, MO, 63110, USA.
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18
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Viginier B, Klitting R, Galon C, Bonnefoux V, Bellet C, Fontaine A, Brottet É, Paty MC, Mercurol A, Ragozin N, Moutailler S, Grard G, de Lamballerie X, Arnaud F, Ratinier M, Raquin V. Peri-domestic entomological surveillance using private traps allows detection of dengue virus in Aedes albopictus during an autochthonous transmission event in mainland France, late summer 2023. Euro Surveill 2024; 29. [PMID: 39239729 DOI: 10.2807/1560-7917.es.2024.29.36.2400195] [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] [Indexed: 09/07/2024] Open
Abstract
While locally-acquired dengue virus (DENV) human infections occur in mainland France since 2010, data to identify the mosquito species involved and to trace the virus are frequently lacking. Supported by a local network gathering public health agencies and research laboratories, we analysed, in late summer 2023, mosquitoes from privately-owned traps within a French urban neighbourhood affected by a dengue cluster. The cluster, in Auvergne-Rhône-Alpes, comprised three cases, including two autochthonous ones. Upon return from a recent visit to the French Caribbean Islands, the third case had consulted healthcare because of dengue-compatible symptoms, but dengue had not been recognised. For the two autochthonous cases, DENV-specific antibodies in serum or a positive quantitative PCR for DENV confirmed DENV infection. The third case had anti-flavivirus IgMs. No DENV genetic sequences were obtained from affected individuals but Aedes albopictus mosquitoes trapped less than 200 m from the autochthonous cases' residence contained DENV. Genetic data from the mosquito-derived DENV linked the cluster to the 2023-2024 dengue outbreak in the French Caribbean Islands. This study highlights the importance of raising mosquito-borne disease awareness among healthcare professionals. It demonstrates Ae. albopictus as a DENV vector in mainland France and the value of private mosquito traps for entomo-virological surveillance.
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Affiliation(s)
- Barbara Viginier
- EPHE, Université PSL, INRAE, Universite Claude Bernard Lyon1, IVPC UMR754, F-69007, Lyon, France
| | - Raphaëlle Klitting
- Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), Marseille, France
- National Reference Center for Arboviruses, Inserm-IRBA, Marseille, France
| | - Clémence Galon
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Violaine Bonnefoux
- Entente Interdépartementale Rhône-Alpes pour la démoustication (French public mosquito control organisation), Chindrieux, France
| | - Christophe Bellet
- Entente Interdépartementale Rhône-Alpes pour la démoustication (French public mosquito control organisation), Chindrieux, France
| | - Albin Fontaine
- Institut de Recherches Biomédicales des Armées (IRBA), Unité de virologie, Marseille, France
- Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), Marseille, France
| | - Élise Brottet
- Santé publique France (French National Public Health Agency), Lyon, France
| | - Marie-Claire Paty
- Santé publique France (French National Public Health Agency), Saint-Maurice, France
| | - Armelle Mercurol
- Agence Régionale de Santé Auvergne-Rhône-Alpes (French Regional Health Agency), Lyon France
| | - Nathalie Ragozin
- Agence Régionale de Santé Auvergne-Rhône-Alpes (French Regional Health Agency), Lyon France
| | - Sara Moutailler
- Anses, INRAE, Ecole Nationale Vétérinaire d'Alfort, UMR BIPAR, Laboratoire de Santé Animale, Maisons-Alfort, France
| | - Gilda Grard
- Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), Marseille, France
- National Reference Center for Arboviruses, Inserm-IRBA, Marseille, France
| | - Xavier de Lamballerie
- Unité des Virus Émergents (UVE: Aix-Marseille Univ, Università di Corsica, IRD 190, Inserm 1207, IRBA), Marseille, France
- National Reference Center for Arboviruses, Inserm-IRBA, Marseille, France
| | - Frédérick Arnaud
- EPHE, Université PSL, INRAE, Universite Claude Bernard Lyon1, IVPC UMR754, F-69007, Lyon, France
| | - Maxime Ratinier
- EPHE, Université PSL, INRAE, Universite Claude Bernard Lyon1, IVPC UMR754, F-69007, Lyon, France
| | - Vincent Raquin
- EPHE, Université PSL, INRAE, Universite Claude Bernard Lyon1, IVPC UMR754, F-69007, Lyon, France
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19
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Padonou GG, Konkon AK, Zoungbédji DM, Salako AS, Sovi A, Oussou O, Sidick A, Ahouandjinou J, Towakinou L, Ossé R, Baba-Moussa L, Akogbéto MC. Detection of DENV-1, DENV-3, and DENV-4 Serotypes in Aedes aegypti and Aedes albopictus, and Epidemic Risk in the Departments of Oueme and Plateau, South-Eastern Benin. Vector Borne Zoonotic Dis 2024; 24:614-624. [PMID: 38686519 DOI: 10.1089/vbz.2023.0071] [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] [Indexed: 05/02/2024] Open
Abstract
Background: This study conducted in the departments of Oueme and Plateau aims to assess the presence of the dengue virus and its different serotypes in Aedes aegypti and Aedes albopictus, as well as the epidemic risk incurred by the populations. Methods: Collections of adult mosquitoes using human landing catches (HLC) were carried out in six communes, three (Porto-Novo, Adjarra, and Avrankou) in the Oueme department and the rest (Ifangni, Kétou, and Pobè) in the Plateau department. Pools of ten Aedes mosquitoes were formed, and stored at -80°C in RNA later. RT-PCR was used to detect dengue virus, and conventional PCR for the different serotypes. Inspection of water containers and collection of Aedes larvae was performed inside and around each house to calculate the stegomyan indices. Results: In the six communes, the dengue virus was present both in Ae. aegypti and Ae. albopictus. Combined data of the two Aedes species at the communes level revealed infection rates ranging from 80.00% (95% CI: 61.43-92.29) to 96.67% (95% CI: 82.78-99.92). In all the communes, the values of stegomyan indices reached the WHO threshold, which indicates the existence of the risk of an arbovirus epidemic. In addition, the infection rates were similar for Ae. aegypti [88.19% (95% CI: 81.27-93.24)] and Ae. albopictus [86.79% (95% CI: 74.66-94.52)]. The three virus serotypes detected in the pools of Aedes were DENV-1, DENV-3, and DENV-4, with a high prevalence for the first two. Conclusion: This study revealed that three serotypes (DENV-1, DENV-3, and DENV-4) of dengue virus circulate in Ae. aegypti and Ae. albopictus in the departments of Oueme and Plateau. Moreover, the risk of transmission of arboviruses was globally high and variable from commune to commune. This information is essential for informed decision-making in the preventive control of the disease.
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Affiliation(s)
- Germain Gil Padonou
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Alphonse Keller Konkon
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - David Mahouton Zoungbédji
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Albert Sourou Salako
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
| | - Arthur Sovi
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Faculty of Agronomy, Université de Parakou, Parakou, Benin
- Faculty of Infectious and Tropical Diseases, Disease Control Department, The London School of Hygiene & Tropical Medicine, London, United Kingdom
| | - Olivier Oussou
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
| | - Aboubakar Sidick
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
| | - Juvénal Ahouandjinou
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
- Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Linda Towakinou
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
| | - Razaki Ossé
- Ministère de la Santé, Centre de Recherche Entomologique de Cotonou, Cotonou, Benin
| | - Lamine Baba-Moussa
- Laboratory of Biology and Molecular Typing in Microbiology, Faculty of Science and Technology, University of Abomey-Calavi, Abomey-Calavi, Benin
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20
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Yu N, Chen S, Liu Y, Wang P, Wang L, Hu N, Zhang H, Li X, Lu H, Jin N. Pathogenicity and transcriptomic resolution in dengue virus serotype 1 infected AGB6 mouse model. J Med Virol 2024; 96:e29895. [PMID: 39228306 DOI: 10.1002/jmv.29895] [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: 05/16/2024] [Revised: 07/27/2024] [Accepted: 08/19/2024] [Indexed: 09/05/2024]
Abstract
Dengue viruses are the causative agents of dengue fever, dengue hemorrhagic fever, and dengue shock syndrome, which are mainly transmitted by Aedes aegypti and Aedes albopictus mosquitoes, and cost billions of dollars annually in patient treatment and mosquito control. Progress in understanding DENV pathogenesis and developing effective treatments has been hampered by the lack of a suitable small pathological animal model. Until now, the candidate vaccine, antibody, and drug for DENV have not been effectively evaluated. Here, we analyzed the pathogenicity of DENV-1 in type Ⅰ and type Ⅱ interferon receptor-deficient mice (AGB6) by intraperitoneal inoculation. Infected mice showed such neurological symptoms as opisthotonus, hunching, ataxia, and paralysis of one or both hind limbs. Viremia can be detected 3 days after infection. It was found that 6.98 × 103 PFU or higher dose induce 100% mortality. To determine the cause of lethality in mice, heart, liver, spleen, lung, kidney, intestinal, and brain tissues were collected from AGB6 mice (at an attack dose of 6.98 × 103 PFU) for RNA quantification, and it was found that the viral load in brain tissues peaked at moribund states (14 dpi) and that the viral loads in the other tissues and organs decreased over time. Significant histopathologic changes were observed in brain tissue (hippocampal region and cerebral cortex). Hematological analysis showed hemorrhage and hemoconcentration in infected mice. DENV-1 can be isolated from the brain tissue of infected mice. Subsequently, brain tissue transcriptome sequencing was performed to assess host response characteristics in infected AGB6 mice. Transcriptional patterns in brain tissue suggest that aberrant expression of pro-inflammatory cytokines induces antiviral responses and tissue damage. Screening of hub genes and their characterization by qPCR and ELISA, it was hypothesized that IL-6 and IFN-γ might be the key factors in dengue virus-induced inflammatory response. Therefore, this study provides an opportunity to decipher certain aspects of dengue pathogenesis further and provides a new platform for drug, antibody, and vaccine testing.
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Affiliation(s)
- Ning Yu
- College of Veterinary Medicine, Jilin University, Changchun, China
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Shigang Chen
- College of Veterinary Medicine, Jilin University, Changchun, China
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Yumeng Liu
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
- Animal Science and Technology College, Guangxi University, Guangxi, China
| | - Peng Wang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Longlong Wang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Ningning Hu
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
| | - He Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
| | - Xiao Li
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
- Research Unit of Key Technologies for Prevention and Control of Virus Zoonoses, Chinese Academy of Medical Sciences, Changchun, China
| | - Huijun Lu
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Research Unit of Key Technologies for Prevention and Control of Virus Zoonoses, Chinese Academy of Medical Sciences, Changchun, China
| | - Ningyi Jin
- College of Veterinary Medicine, Jilin University, Changchun, China
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, China
- Animal Science and Technology College, Guangxi University, Guangxi, China
- College of Animal Sciences, Zhejiang University, Hangzhou, China
- Research Unit of Key Technologies for Prevention and Control of Virus Zoonoses, Chinese Academy of Medical Sciences, Changchun, China
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21
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Chongjun Y, Nasr AMS, Latif MAM, Rahman MBA, Marlisah E, Tejo BA. Predicting repurposed drugs targeting the NS3 protease of dengue virus using machine learning-based QSAR, molecular docking, and molecular dynamics simulations. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2024:1-22. [PMID: 39210743 DOI: 10.1080/1062936x.2024.2392677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Accepted: 08/08/2024] [Indexed: 09/04/2024]
Abstract
Dengue fever, prevalent in Southeast Asian countries, currently lacks effective pharmaceutical interventions for virus replication control. This study employs a strategy that combines machine learning (ML)-based quantitative-structure-activity relationship (QSAR), molecular docking, and molecular dynamics simulations to discover potential inhibitors of the NS3 protease of the dengue virus. We used nine molecular fingerprints from PaDEL to extract features from the NS3 protease dataset of dengue virus type 2 in the ChEMBL database. Feature selection was achieved through the low variance threshold, F-Score, and recursive feature elimination (RFE) methods. Our investigation employed three ML models - support vector machine (SVM), random forest (RF), and extreme gradient boosting (XGBoost) - for classifier development. Our SVM model, combined with SVM-RFE, had the best accuracy (0.866) and ROC_AUC (0.964) in the testing set. We identified potent inhibitors on the basis of the optimal classifier probabilities and docking binding affinities. SHAP and LIME analyses highlighted the significant molecular fingerprints (e.g. ExtFP69, ExtFP362, ExtFP576) involved in NS3 protease inhibitory activity. Molecular dynamics simulations indicated that amphotericin B exhibited the highest binding energy of -212 kJ/mol and formed a hydrogen bond with the critical residue Ser196. This approach enhances NS3 protease inhibitor identification and expedites the discovery of dengue therapeutics.
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Affiliation(s)
- Y Chongjun
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
| | - A M S Nasr
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
| | - M A M Latif
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
- Centre for Foundation Studies in Science, Universiti Putra Malaysia, Serdang, Malaysia
| | - M B A Rahman
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
| | - E Marlisah
- Department of Computer Science, Faculty of Computer Science and Information Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - B A Tejo
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Malaysia
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22
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Maneerattanasak S, Ngamprasertchai T, Tun YM, Ruenroengbun N, Auewarakul P, Boonnak K. Prevalence of Dengue, Zika, and Chikungunya Virus Infections among Mosquitoes in Asia: A Systematic Review and Meta-Analysis. Int J Infect Dis 2024:107226. [PMID: 39216785 DOI: 10.1016/j.ijid.2024.107226] [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: 05/22/2024] [Revised: 08/06/2024] [Accepted: 08/24/2024] [Indexed: 09/04/2024] Open
Abstract
BACKGROUND Dengue virus (DENV), Zika virus (ZIKV), and chikungunya virus (CHIKV) continue to pose significant public health risks. This study aims to assess the prevalence of these arbovirus infections in field-caught mosquitoes across Asia. METHODS Studies published after the year 2000 on DENV, ZIKV, and/or CHIKV infections in Asian mosquitoes were identified from Embase, Scopus, PubMed, and Ovid. A random-effects model estimated the pooled prevalence, defined as the overall prevalence from included studies, adjusted for variability among the studies. Meta-regression models were used to evaluate the association between predictors and their prevalence. RESULTS A total of 2,529 articles were retrieved; 57 met the inclusion criteria. Pooled prevalence of DENV, ZIKV, and CHIKV infections in Asian mosquitoes were 5.85%, 2.15%, and 1.26%, respectively. Subgroup analysis revealed varying DENV prevalence across regions: East Asia (3.32%), South Asia (5.26%), and Southeast Asia (6.92%). Univariate regression analysis demonstrated significant associations between mosquito capture site and DENV prevalence (p<0.001), and between study region and ZIKV prevalence (p=0.005). However, no significant predictors were identified for CHIKV prevalence. CONCLUSION Our findings provide reference pooled summary estimates of arbovirus infections in mosquitoes, offering crucial insight into the regional disease burden and guiding the development and implementation of arbovirus surveillance in mosquitoes.
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Affiliation(s)
- Sarunya Maneerattanasak
- Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 10700
| | - Thundon Ngamprasertchai
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand 10400
| | - Yin May Tun
- Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 10700.; Health Intervention and Technology Assessment Program (HITAP), Ministry of Public Health, Nonthaburi, Thailand 11000
| | - Narisa Ruenroengbun
- Department of Pharmaceutical Care, Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, Thailand 72000
| | - Prasert Auewarakul
- Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 10700
| | - Kobporn Boonnak
- Department of Immunology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand 10700..
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23
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Abu AEI, Becker M, Accoti A, Sylla M, Dickson LB. Low humidity enhances Zika virus infection and dissemination in Aedes aegypti mosquitoes. mSphere 2024; 9:e0040124. [PMID: 39092912 DOI: 10.1128/msphere.00401-24] [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: 05/21/2024] [Accepted: 06/14/2024] [Indexed: 08/04/2024] Open
Abstract
As climate change alters Earth's biomes, it is expected the transmission dynamics of mosquito-borne viruses will change. While the effects of temperature changes on mosquito-virus interactions and the spread of the pathogens have been elucidated over the last decade, the impact of relative humidity changes is still relatively unknown. To overcome this knowledge gap, we exposed Aedes aegypti females to various humidity conditions. We measured different components of vectorial capacity such as survival, blood-feeding rates, and changes in infection and dissemination of Zika virus. Survival decreased as the humidity level decreased, while infection rates increased as the humidity level decreased. Alternatively, blood feeding rates and disseminated infection rates peaked at the intermediate 50% relative humidity treatment but were the same in the 30% and 80% relative humidity treatments. These results provide empirical evidence that Ae. aegypti exposure to low humidity can enhance Zika virus infection in the mosquito, which has important implications in predicting how climate change will impact mosquito-borne viruses.IMPORTANCEViruses transmitted by mosquitoes to humans are a major public health burden and are expected to increase under climate change. While we know that temperature is an important driver of variation in arbovirus replication in the mosquito, very little is known about how other relevant climate variables such as humidity will influence the interaction between mosquitoes and the viruses they transmit. Given the variability in humidity across environments, and the predicted changes in humidity under climate change, it is imperative that we also study the impact that it has on mosquito infection and transmission of arboviruses.
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Affiliation(s)
- Angel Elma I Abu
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Margaret Becker
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Anastasia Accoti
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Massamba Sylla
- Laboratory Vectors and Parasites, Department of Livestock Sciences and Techniques, Sine Saloum University El Hadji Ibrahima NIASS, Kaffrine, Senegal
| | - Laura B Dickson
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
- Center for Vector-borne and Zoonotic Diseases, University of Texas Medical Branch, Galveston, Texas, USA
- The West African Center for Emerging Infectious Diseases, Centers for Research in Emerging Infectious Diseases, Galveston, Texas, USA
- Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, Texas, USA
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24
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Medina FA, Vila F, Adams LE, Cardona J, Carrion J, Lamirande E, Acosta LN, De León-Rodríguez CM, Beltran M, Grau D, Rivera-Amill V, Balmaseda A, Harris E, Madewell ZJ, Waterman SH, Paz-Bailey G, Whitehead S, Muñoz-Jordán JL. Comparison of the sensitivity and specificity of commercial anti-dengue virus IgG tests to identify persons eligible for dengue vaccination. J Clin Microbiol 2024:e0059324. [PMID: 39194193 DOI: 10.1128/jcm.00593-24] [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: 04/16/2024] [Accepted: 08/11/2024] [Indexed: 08/29/2024] Open
Abstract
The Advisory Committee on Immunization Practices (ACIP) recommended that dengue pre-vaccination screening tests for Dengvaxia administration have at least 98% specificity and 75% sensitivity. This study evaluates the performance of commercial anti-DENV IgG tests to identify tests that could be used for pre-vaccination screening. First, for seven tests, we evaluated sensitivity and specificity in early convalescent dengue virus (DENV) infection, using 44 samples collected 7-30 days after symptom onset and confirmed by RT-PCR. Next, for the five best-performing tests and two additional tests (with and without an external test reader) that became available later, we evaluated performance to detect past dengue infection among a panel of 44 specimens collected in 2018-2019 from healthy 9- to 16-year-old children from Puerto Rico. Finally, a full-scale evaluation was done with the four best-performing tests using 400 specimens from the same population. We used virus focus reduction neutralization test and an in-house DENV IgG ELISA as reference standards. Of seven tests, five showed ≥75% sensitivity in detecting anti-DENV IgG in early convalescent specimens with low cross-reactivity to the Zika virus. For the detection of previous DENV infections, the tests with the highest performance were the Euroimmun NS1 IgG ELISA (sensitivity 84.5%, specificity 97.1%) and CTK Dengue IgG rapid test R0065C with the test reader (sensitivity 76.2% specificity 98.1%). There are IgG tests available that can be used to accurately classify individuals with previous DENV infection as eligible for dengue vaccination to support safe vaccine implementation. IMPORTANCE The Advisory Committee on Immunization Practices (ACIP) has set forth recommendations that dengue pre-vaccination screening tests must exhibit at least 98% specificity and 75% sensitivity. Our research rigorously assesses the performance of various commercial tests against these benchmarks using well-characterized specimens from Puerto Rico. The findings from our study are particularly relevant given FDA approval and ACIP recommendation of Sanofi Pasteur's Dengvaxia vaccine, highlighting the need for accurate pre-vaccination screening tools.
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Affiliation(s)
- Freddy A Medina
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Frances Vila
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Laura E Adams
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Jaime Cardona
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Jessica Carrion
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | | | - Luz N Acosta
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | | | - Manuela Beltran
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Demian Grau
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Vanessa Rivera-Amill
- Ponce Health Sciences University/Ponce Research Institute, Ponce, Puerto Rico, USA
| | - Angel Balmaseda
- Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministerio de Salud, Managua, Nicaragua
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, USA
| | - Zachary J Madewell
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Stephen H Waterman
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
| | - Gabriela Paz-Bailey
- Centers for Disease Control and Prevention (CDC), San Juan, Puerto Rico, USA
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25
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Bahojb Mahdavi SZ, Jebelli A, Aghbash PS, Baradaran B, Amini M, Oroojalian F, Pouladi N, Baghi HB, de la Guardia M, Mokhtarzadeh AA. A comprehensive overview on the crosstalk between microRNAs and viral pathogenesis and infection. Med Res Rev 2024. [PMID: 39185567 DOI: 10.1002/med.22073] [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: 11/06/2021] [Revised: 04/11/2023] [Accepted: 08/04/2024] [Indexed: 08/27/2024]
Abstract
Infections caused by viruses as the smallest infectious agents, pose a major threat to global public health. Viral infections utilize different host mechanisms to facilitate their own propagation and pathogenesis. MicroRNAs (miRNAs), as small noncoding RNA molecules, play important regulatory roles in different diseases, including viral infections. They can promote or inhibit viral infection and have a pro-viral or antiviral role. Also, viral infections can modulate the expression of host miRNAs. Furthermore, viruses from different families evade the host immune response by producing their own miRNAs called viral miRNAs (v-miRNAs). Understanding the replication cycle of viruses and their relation with host miRNAs and v-miRNAs can help to find new treatments against viral infections. In this review, we aim to outline the structure, genome, and replication cycle of various viruses including hepatitis B, hepatitis C, influenza A virus, coronavirus, human immunodeficiency virus, human papillomavirus, herpes simplex virus, Epstein-Barr virus, Dengue virus, Zika virus, and Ebola virus. We also discuss the role of different host miRNAs and v-miRNAs and their role in the pathogenesis of these viral infections.
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Affiliation(s)
- Seyedeh Zahra Bahojb Mahdavi
- Department of Biology, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Asiyeh Jebelli
- Department of Biological Science, Faculty of Basic Science, Higher Education Institute of Rab-Rashid, Tabriz, Iran
- Tuberculosis and Lung Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Behzad Baradaran
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Amini
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Oroojalian
- Department of Advanced Sciences and Technologies in Medicine, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Nasser Pouladi
- Department of Biology, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Hossein Bannazadeh Baghi
- Department of Virology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Miguel de la Guardia
- Department of Analytical Chemistry, University of Valencia, Burjassot, Valencia, Spain
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26
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Mayilsamy M, Subramani S, Veeramanoharan R, Vijayakumar A, Asaithambi AT, Murugesan A, Selvaraj N, Balakrishnan V, Rajaiah P. Mating of unfed, engorged, and partially to fully gravid Aedes aegypti (Diptera: Culicidae) female mosquitoes in producing viable eggs. Parasit Vectors 2024; 17:362. [PMID: 39183365 PMCID: PMC11346051 DOI: 10.1186/s13071-024-06433-z] [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: 04/09/2024] [Accepted: 08/05/2024] [Indexed: 08/27/2024] Open
Abstract
BACKGROUND Understanding the relationship between blood-feeding and mating is important in effectively managing the most well-adapted vector insect, Aedes aegypti (Linnaeus). Although extensive studies have investigated the behavioural aspects of Aedes such as blood-feeding, mating, and their relationship, several knowledge gaps still exist. Therefore, the present study was undertaken to determine the possibility of successful mating by unfed, engorged, and partially to fully gravid (up to 5 days after blood-feeding with fully developed eggs) female Ae. aegypti mosquitoes and production of viable eggs. METHODS Mating of sexually mature adult Aedes aegypti was allowed in three different ways. In control 1, the females were allowed to mate before taking blood meal, and in control 2, the females were not at all allowed to mate. In the experiment, the females were separated into six categories, viz. D-0 to D-5. In D-0, the females were allowed to mate immediately after the bloodmeal and, in D-1, the females were allowed to mate on the first day of blood feeding, likewise, the females of D-2, D-3, D-4 and D-5 were allowed to mate on 2nd, 3rd, 4th and 5th day of blood feeding. Ovitrap was uniformly kept on the 4th day of blood feeding for the cages D-0 to D-3 for 1 h and then removed and for the cages D-4, and D-5, the ovitrap was kept on 4th and 5th day of blood feeding for 1h immediately after mating. The total number of eggs and the total number of hatching were counted. In the subsequent days, the entire experiment was replicated two times with different cohorts of mosquitoes, and the mean value of three experiments was used to draw Excel bars with 5% error bars and also for the statistical analysis. RESULTS It was found that mating just before oviposition was sufficient to produce 1581 eggs (70% compared with control) and fertilize 1369 eggs (85% compared with total eggs laid), which is far higher than the 676 non-hatching (unfertilized) eggs (30%) laid by unmated females. Although mating is not essential for producing eggs, our study shows that even brief exposure to the semen and seminal fluids greatly enhances the oviposition and hatching efficiency, even if the mating occurs just before oviposition. However, those females mating before blood-feeding and those mating after blood-feeding produced 2266 and 2128 eggs, with hatching rates of 96.78% and 95.54%, respectively. Hence, the retention time of seminal fluid in the female seems to influence the number of eggs laid and the number of eggs hatched. CONCLUSIONS In general, mating is possible in Ae. aegypti even minutes before oviposition and is sufficient to produce a greater number of viable eggs.
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Affiliation(s)
- Muniaraj Mayilsamy
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India.
| | - Surendiran Subramani
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Rajamannar Veeramanoharan
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Asifa Vijayakumar
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Amuthalingam T Asaithambi
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Arthi Murugesan
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Nandhakumar Selvaraj
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Vijayakumar Balakrishnan
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
| | - Paramasivan Rajaiah
- ICMR-Vector Control Research Centre Field Station, No. 4 Sarojini Street, Chinna Chokkikulam, Madurai, 625002, Tamil Nadu, India
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Mokhtar S, Pittman Ratterree DC, Britt AF, Fisher R, Ndeffo-Mbah ML. Global risk of Dengue outbreaks and the impact of El Niño events. ENVIRONMENTAL RESEARCH 2024:119830. [PMID: 39181299 DOI: 10.1016/j.envres.2024.119830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 08/06/2024] [Accepted: 08/21/2024] [Indexed: 08/27/2024]
Abstract
BACKGROUND Dengue fever is an arboviral disease caused by the dengue virus (DENV). Its geographical distribution and health burden have been steadily increasing through tropical and subtropical climates in recent decades. METHODS We developed a temperature- and precipitation-dependent mechanistic model for the global risk of dengue fever outbreaks using the basic reproduction number (R0) as the metric of disease transmission risk. We used our model to evaluate the global risk of dengue outbreaks from 1950-2020 and to investigate the impact of annual seasons and El Niño events. RESULTS We showed that the global annual risk of dengue outbreaks has steadily increased during the last four decades. Highest R0 values were observed in South America, Southeast Asia, and the Equatorial region of Africa year-round with large seasonal variations occurring in other regions. El Niño was shown to be positively correlated with the global risk of dengue outbreaks with a correlation of 0.52. However, the impact of El Niño on dengue R0 was shown to vary across geographical regions and between El Niño events. CONCLUSIONS Strong El Niño events may increase the risk of dengue outbreaks across the globe. The onset of these events may trigger a surge of control efforts to minimize risk of dengue outbreaks.
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Affiliation(s)
- Sina Mokhtar
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA; Department of Mathematics & Statistics, University of New Mexico, Albuquerque, NM, 87106, USA
| | - Dana C Pittman Ratterree
- Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University, College Station, TX, 77843, USA
| | - Amber F Britt
- Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University, College Station, TX, 77843, USA
| | - Rebecca Fisher
- Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University, College Station, TX, 77843, USA
| | - Martial L Ndeffo-Mbah
- Department of Veterinary Integrative Biosciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, 77843, USA; Department of Epidemiology and Biostatistics, School of Public Health, Texas A&M University, College Station, TX, 77843, USA.
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Vajdi A, Cohnstaedt LW, Scoglio CM. Assessing dengue risk globally using non-Markovian models. J Theor Biol 2024; 591:111865. [PMID: 38823767 DOI: 10.1016/j.jtbi.2024.111865] [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: 11/30/2023] [Revised: 04/24/2024] [Accepted: 05/27/2024] [Indexed: 06/03/2024]
Abstract
Dengue is a vector-borne disease transmitted by Aedes mosquitoes. The worldwide spread of these mosquitoes and the increasing disease burden have emphasized the need for a spatio-temporal risk map capable of assessing dengue outbreak conditions and quantifying the outbreak risk. Given that the life cycle of Aedes mosquitoes is strongly influenced by habitat temperature, numerous studies have utilized temperature-dependent development rates of these mosquitoes to construct virus transmission and outbreak risk models. In this study, we contribute to existing research by developing a mechanistic model for the mosquito life cycle that accurately captures its non-Markovian nature. Beginning with integral equations to track the mosquito population across different life cycle stages, we demonstrate how to derive the corresponding differential equations using phase-type distributions. This approach can be further applied to similar non-Markovian processes that are currently described with less accurate Markovian models. By fitting the model to data on human dengue cases, we estimate several model parameters, allowing the development of a global spatiotemporal dengue risk map. This risk model employs temperature and precipitation data to assess the environmental suitability for dengue outbreaks in a given area.
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Affiliation(s)
- Aram Vajdi
- Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS, United States of America
| | - Lee W Cohnstaedt
- United States Department of Agriculture, Agricultural Research Service, Foreign Arthropod-Borne Animal Diseases Research Unit, Manhattan, KS, United States of America.
| | - Caterina M Scoglio
- Department of Electrical and Computer Engineering, Kansas State University, Manhattan, KS, United States of America
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Kayesh MEH, Nazneen H, Kohara M, Tsukiyama-Kohara K. An effective pan-serotype dengue vaccine and enhanced control strategies could help in reducing the severe dengue burden in Bangladesh-A perspective. Front Microbiol 2024; 15:1423044. [PMID: 39228383 PMCID: PMC11368799 DOI: 10.3389/fmicb.2024.1423044] [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] [Received: 04/25/2024] [Accepted: 08/06/2024] [Indexed: 09/05/2024] Open
Abstract
Dengue is an important vector-borne disease occurring globally. Dengue virus (DENV) infection can result in a potentially life-threatening disease. To date, no DENV-specific antiviral treatment is available. Moreover, an equally effective pan-serotype dengue virus vaccine is not available. Recently, two DENV vaccines, Dengvaxia and Qdenga, were licensed for limited use. However, none of them have been approved in Bangladesh. DENV is transmitted by Aedes mosquitoes, and global warming caused by climate change favoring Aedes breeding plays an important role in increasing DENV infections in Bangladesh. Dengue is a serious public health concern in Bangladesh. In the year 2023, Bangladesh witnessed its largest dengue outbreak, with the highest number of dengue cases (n = 321,179) and dengue-related deaths (n = 1,705) in a single epidemic year. There is an increased risk of severe dengue in individuals with preexisting DENV-specific immunoglobulin G if the individuals become infected with different DENV serotypes. To date, vector control has remained the mainstay for controlling dengue; therefore, an immediate, strengthened, and effective vector control program is critical and should be regularly performed for controlling dengue outbreaks in Bangladesh. In addition, the use of DENV vaccine in curbing dengue epidemics in Bangladesh requires more consideration and judgment by the respective authority of Bangladesh. This review provides perspectives on the control and prevention of dengue outbreaks. We also discuss the challenges of DENV vaccine use to reduce dengue epidemics infection in Bangladesh.
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Affiliation(s)
- Mohammad Enamul Hoque Kayesh
- Department of Microbiology and Public Health, Faculty of Animal Science and Veterinary Medicine, Patuakhali Science and Technology University, Barishal, Bangladesh
| | - Humayra Nazneen
- Department of Haematology, Dhaka Medical College Hospital, Dhaka, Bangladesh
| | - Michinori Kohara
- Department of Microbiology and Cell Biology, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Kyoko Tsukiyama-Kohara
- Joint Faculty of Veterinary Medicine, Transboundary Animal Diseases Centre, Kagoshima University, Kagoshima, Japan
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Hou W, Zhou Y, Luo W, Wang L, Kwan MP, Cook AR. Mapping environmental suitability changes for arbovirus mosquitoes in Southeast Asia: 1960-2020. iScience 2024; 27:110498. [PMID: 39165847 PMCID: PMC11334785 DOI: 10.1016/j.isci.2024.110498] [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: 11/21/2023] [Revised: 05/03/2024] [Accepted: 07/10/2024] [Indexed: 08/22/2024] Open
Abstract
Spatial epidemiology recognizes the impact of environmental factors on human infectious diseases through disease vectors. The expansion of Aedes aegypti and Aedes albopictus raises concerns about health risks due to their changing distribution. However, current mosquito mapping methods have low spatial resolution and limited focus on long-term trends and factors. This study develops a high-resolution framework (500 m) to map mosquito distribution in Southeast Asia from 1960 to 2020. It includes a species distribution model, a spatial autocorrelation model, and a geographical detector model. The study produces Southeast Asia's first 500 m resolution map of mosquito suitability, revealing significant increases in mosquito suitability in most cities over the past 60 years. The analysis indicates a shift in high-suitability areas from coastal to inland regions, with nighttime land surface temperature playing a key role. These findings are crucial for regional risk assessments and mitigation strategies related to vector-borne diseases.
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Affiliation(s)
- Weitao Hou
- Department of Biological Sciences, National University of Singapore, Singapore
- School of Design and the Built Environment, Curtin University, Perth, Australia
- School of Earth and Planetary Sciences, Discipline of Spatial Sciences, Curtin University, Perth, Australia
| | - Yuxuan Zhou
- Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong SAR, China
- GeoSpatialX Lab, Department of Geography, National University of Singapore, Singapore, Singapore
| | - Wei Luo
- GeoSpatialX Lab, Department of Geography, National University of Singapore, Singapore, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
| | - Lin Wang
- Department of Genetics, University of Cambridge, Cambridge, UK
| | - Mei-Po Kwan
- Department of Geography and Resource Management and Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Hong Kong, China
| | - Alex R. Cook
- Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore
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Ni J, Wang J, Fang C, Zhang W, Gong Z. A Review of the Latest Control Strategies for Mosquito-Borne Diseases. China CDC Wkly 2024; 6:852-856. [PMID: 39211443 PMCID: PMC11350232 DOI: 10.46234/ccdcw2024.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 08/03/2024] [Indexed: 09/04/2024] Open
Abstract
Mosquito-borne diseases are persistent and potentially severe posing a threat to global pandemic preparedness. The risk of mosquito-borne virus transmission is rapidly increasing due to the unprecedented spread of viruses such as dengue and chikungunya, the disruption of global mosquito-borne disease control efforts following the emergence of coronavirus diseases 2019 (COVID-19) in 2019, global warming, and human activities. To address this global challenge, various innovative mosquito control technologies are being developed worldwide. This paper summarizes the latest advances in mosquito vector control, focusing on China's latest mosquito control strategies, to provide insights into implementing novel mosquito-borne disease control measures.
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Affiliation(s)
- Jing Ni
- School of Public Health, Hangzhou Medical College, Hangzhou City, Zhejiang Province, China
| | - Jinna Wang
- Department of Communicable Disease Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou City, Zhejiang Province, China
| | - Chunfu Fang
- Quzhou Center for Disease Control and Prevention, Quzhou City, Zhejiang Province, China
| | - Wenrong Zhang
- School of Public Health, Hangzhou Medical College, Hangzhou City, Zhejiang Province, China
| | - Zhenyu Gong
- Department of Communicable Disease Control and Prevention, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou City, Zhejiang Province, China
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Li Z, Liu HY, He Z, Chakravarty A, Golden RP, Jiang Z, You I, Yue H, Donovan KA, Du G, Che J, Tse J, Che I, Lu W, Fischer ES, Zhang T, Gray NS, Yang PL. Discovery of Potent Degraders of the Dengue Virus Envelope Protein. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2405829. [PMID: 39145423 DOI: 10.1002/advs.202405829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 06/26/2024] [Indexed: 08/16/2024]
Abstract
Targeted protein degradation has been widely adopted as a new approach to eliminate both established and previously recalcitrant therapeutic targets. Here, it is reported that the development of small molecule degraders of the envelope (E) protein of dengue virus. Two classes of bivalent E-degraders are developed by linking two previously reported E-binding small molecules, GNF-2, and CVM-2-12-2, to a glutarimide-based recruiter of the CRL4CRBN ligase to effect proteosome-mediated degradation of the E protein. ZXH-2-107 (based on GNF-2) is an E-degrader with ABL inhibitory activity while ZXH-8-004 (based on CVM-2-12-2) is a selective and potent E-degrader. These two compounds provide proof of concept that difficult-to-drug targets such as a viral envelope protein can be effectively eliminated using a bivalent degrader and provide starting points for the future development of a new class of direct-acting antiviral drugs.
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Affiliation(s)
- Zhengnian Li
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Han-Yuan Liu
- Department of Microbiology and Immunology, Stanford University School of Medicine, 279 Campus Drive, Palo Alto, CA, 94305, USA
| | - Zhixiang He
- Department of Cancer Biology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, 02215, USA
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, 02115, USA
| | - Antara Chakravarty
- Department of Microbiology and Immunology, Stanford University School of Medicine, 279 Campus Drive, Palo Alto, CA, 94305, USA
| | - Ryan P Golden
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Zixuan Jiang
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Inchul You
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | | | - Katherine A Donovan
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, 02115, USA
| | - Guangyan Du
- Department of Cancer Biology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, 02215, USA
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, 02115, USA
| | - Jianwei Che
- Department of Cancer Biology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, 02215, USA
| | - Jason Tse
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Isaac Che
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Wenchao Lu
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Eric S Fischer
- Department of Cancer Biology, Dana-Farber Cancer Institute, 450 Brookline Avenue, Boston, 02215, USA
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, 02115, USA
| | - Tinghu Zhang
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Nathanael S Gray
- Department of Chemical and Systems Biology, Chem-H and Stanford Cancer Institute, Stanford Medicine, Stanford University, 290 Jane Stanford Way, Stanford, CA, 94305, USA
| | - Priscilla L Yang
- Department of Microbiology and Immunology, Stanford University School of Medicine, 279 Campus Drive, Palo Alto, CA, 94305, USA
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Kim DY, Hii J, Chareonviriyaphap T. Air-Drying Time Affects Mortality of Pyrethroid-Susceptible Aedes aegypti Exposed to Transfluthrin-Treated Filter Papers. INSECTS 2024; 15:616. [PMID: 39194820 DOI: 10.3390/insects15080616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Revised: 08/09/2024] [Accepted: 08/13/2024] [Indexed: 08/29/2024]
Abstract
Increasing temperature can enhance the geographical spread and behavior of disease vector mosquitoes, exposing vulnerable populations to Aedes-borne viruses and infections. To address this risk, cost-effective and sustained intervention vector control tools are required, such as volatile pyrethroid spatial repellents. This study used a high-throughput screening system toxicity bioassay to determine the discriminating concentrations of transfluthrin-treated filter papers with variable air-drying times exposed to pyrethroid-susceptible Aedes aegypti mosquitoes. At the highest transfluthrin concentration (0.01706%), a significant reduction in mosquito mortality was observed in filter papers air-dried for 24 h compared to those air-dried for 1 h (odds ratio = 0.390, p < 0.001, 95% confidence interval: 0.23-0.66). Conversely, no significant difference in mortality was found between filter papers air-dried for 1 h and those air-dried for 12 h (odds ratio = 0.646, p = 0.107, 95% confidence interval: 0.38-1.10). The discriminating concentration was 2.8-fold higher for transfluthrin-treated filter papers air-dried for 24 h than it was for papers air-dried for 1 h, and it increased 5-fold from 1 h to 336 h of air-drying. These results show that the optimal air-drying period of transfluthrin-treated filter paper is critical, as higher discriminating concentration values may lead to underestimations of insecticide resistance. The instability of transfluthrin-treated papers necessitates the use of the World Health Organization (WHO) bottle bioassay, which is the preferred method for determining mosquito susceptibility to volatile insecticides.
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Affiliation(s)
- Dae-Yun Kim
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
- Research and Lifelong Learning Center for Urban and Environmental Entomology, Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand
| | - Jeffrey Hii
- College of Public Health, Medical & Veterinary Sciences, James Cook University, Brisbane, QL 4000, Australia
| | - Theeraphap Chareonviriyaphap
- Department of Entomology, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
- Research and Lifelong Learning Center for Urban and Environmental Entomology, Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand
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Soto-López JD, Barrios-Izás MA, Vieira Lista MC, Muro A. Role of Non-Residential Larval Habitats in Aedes Spatiotemporal Egg Production. Life (Basel) 2024; 14:1013. [PMID: 39202755 PMCID: PMC11355553 DOI: 10.3390/life14081013] [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] [Received: 07/01/2024] [Revised: 07/22/2024] [Accepted: 08/13/2024] [Indexed: 09/03/2024] Open
Abstract
Aedes mosquitoes play a pivotal role as vectors of several arboviral diseases, presenting significant public health challenges worldwide. Their invasive success in tropical regions has raised substantial medical concerns. In Guatemala, Aedes mosquitoes are widely distributed and are the primary vectors of the dengue virus. Efforts to control and monitor Aedes populations have evolved over time, incorporating strategies such as spatial repellents, larvicides, genetic modifications, and targeted interventions. Previous research has shown the heterogeneous spatial-temporal distribution of these mosquitoes within each season, influenced by temperature variations and favorable environmental conditions for breeding. This study analyzed hot-spot patterns of spatiotemporal egg density in Santa Elena de la Cruz, Petén, Guatemala, from March to September 2022. The aim was to determine whether these patterns were influenced by non-residential larval habitats with plant cover that are not treated by healthcare entities, as well as the proximity between such habitats. Our findings include the collection and registration of over 16,000 Aedes eggs during the study period. Local analyses revealed hot-spot patterns in egg densities associated with non-residential larval habitats and their proximity. These insights highlight critical focal points where targeted interventions could be implemented more effectively, resulting in cost-efficient mosquito vector control.
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Affiliation(s)
- Julio D. Soto-López
- Infectious and Tropical Diseases Research Group (e-INTRO), Biomedical Research Institute of Salamanca-Research Centre for Tropical Diseases (IBSAL-CIETUS), Faculty of Pharmacy, University of Salamanca, 37008 Salamanca, Spain; (J.D.S.-L.); (M.C.V.L.)
- Research Institute, University Center of Zacapa, University of San Carlos of Guatemala, Zacapa 01019, Guatemala;
| | - Manuel A. Barrios-Izás
- Research Institute, University Center of Zacapa, University of San Carlos of Guatemala, Zacapa 01019, Guatemala;
| | - María Carmen Vieira Lista
- Infectious and Tropical Diseases Research Group (e-INTRO), Biomedical Research Institute of Salamanca-Research Centre for Tropical Diseases (IBSAL-CIETUS), Faculty of Pharmacy, University of Salamanca, 37008 Salamanca, Spain; (J.D.S.-L.); (M.C.V.L.)
| | - Antonio Muro
- Infectious and Tropical Diseases Research Group (e-INTRO), Biomedical Research Institute of Salamanca-Research Centre for Tropical Diseases (IBSAL-CIETUS), Faculty of Pharmacy, University of Salamanca, 37008 Salamanca, Spain; (J.D.S.-L.); (M.C.V.L.)
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Liang Y, Dai X. The global incidence and trends of three common flavivirus infections (Dengue, yellow fever, and Zika) from 2011 to 2021. Front Microbiol 2024; 15:1458166. [PMID: 39206366 PMCID: PMC11349664 DOI: 10.3389/fmicb.2024.1458166] [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: 07/02/2024] [Accepted: 07/31/2024] [Indexed: 09/04/2024] Open
Abstract
Background Flavivirus pose a continued threat to global health, yet their worldwide burden and trends remain poorly quantified. We aimed to evaluate the global, regional, and national incidence of three common flavivirus infections (Dengue, yellow fever, and Zika) from 2011 to 2021. Methods Data on the number and rate of incidence for the three common flavivirus infection in 204 countries and territories were retrieved from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2021. The estimated annual percent change (EAPC) was calculated to quantify the temporal trend during 2011-2016, 2016-2019, and 2019-2021, respectively. Results In 2021, an estimated 59,220,428 individuals were infected globally, comprising 58,964,185 cases of dengue, 86,509 cases of yellow fever, and 169,734 cases of Zika virus infection. The age-standardized incidence rate (ASIR) of the three common flavivirus infections increased by an annual average of 5.08% (95% CI 4.12 to 6.05) globally from 2011 to 2016, whereas decreased by an annual average of -8.37% (95% CI -12.46 to -4.08) per year between 2016 to 2019. The ASIR remained stable during 2019-2021, with an average change of 0.69% (95% CI -0.96 to 2.37) per year globally for the three common flavivirus infections. Regionally, the burden of the three common flavivirus infections was primarily concentrated in those regions with middle income, such as South Asia, Southeast Asia, and Tropical Latin America. Additionally, at the country level, there was an inverted "U" relationship between the SDI level and the ASI. Notably, an increase in the average age of infected cases has been observed worldwide, particularly in higher-income regions. Conclusion Flavivirus infections are an expanding public health concern worldwide, with considerable regional and demographic variation in the incidence. Policymakers and healthcare providers must stay vigilant regarding the impact of COVID-19 and other environmental factors on the risk of flavivirus infection and be prepared for potential future outbreaks.
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Affiliation(s)
- Yuanhao Liang
- Clinical Experimental Center, Jiangmen Engineering Technology Research Center of Clinical Biobank and Translational Research, Jiangmen Central Hospital, Jiangmen, China
| | - Xingzhu Dai
- Department of Stomatology, Guangdong Provincial People’s Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
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Nasar S, Iftikhar S, Saleem R, Nadeem MS, Ali M. The N and C-terminal deleted variant of the dengue virus NS1 protein is a potential candidate for dengue vaccine development. Sci Rep 2024; 14:18883. [PMID: 39143088 PMCID: PMC11324946 DOI: 10.1038/s41598-024-65593-1] [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: 09/18/2023] [Accepted: 06/21/2024] [Indexed: 08/16/2024] Open
Abstract
NS1 is an elusive dengue protein, involved in viral replication, assembly, pathogenesis, and immune evasion. Its levels in blood plasm are positively related to disease severity like thrombocytopenia, hemorrhage, and vascular leakage. Despite its pathogenic roles, NS1 is being used in various vaccine formulations due to its sequence conservancy, ability to produce protective antibodies and low risk for inducing antibody-dependent enhancement. In this study, we have used bioinformatics tools and reported literature to develop an NS1 variant (dNS1). Molecular docking studies were performed to evaluate the receptor-binding ability of the NS1 and dNS1 with TLR4. NS1 and dNS1 (153 to 312 amino acid region) genes were cloned, expressed and protein was purified followed by refolding. Docking studies showed the binding of NS1 and dNS1 with the TLR4 receptor which suggests that N and C-terminal sequences of NS1 are not critical for receptor binding. Antibodies against NS1 and dNS1 were raised in rabbits and binding affinity of anti-dNS1 anti-NS1 sera was evaluated against both NS1 and dNS1. Similar results were observed through western blotting which highlight that N and C-terminal deletion of NS1 does not compromise the immunogenic potential of dNS1 hence, supports its use in future vaccine formulations as a substitute for NS1.
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Affiliation(s)
- Sitara Nasar
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Saima Iftikhar
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan.
| | - Rida Saleem
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | | | - Muhammad Ali
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
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37
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Iqtadar S, Akram J, Khan A. The Urgent Need for Dengue Vaccination: Combating an Escalating Public Health Crisis in Pakistan. Vaccines (Basel) 2024; 12:913. [PMID: 39204037 PMCID: PMC11360665 DOI: 10.3390/vaccines12080913] [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: 06/15/2024] [Revised: 07/23/2024] [Accepted: 07/24/2024] [Indexed: 09/03/2024] Open
Abstract
Dengue fever, caused by the dengue virus (DENV), poses a significant global health threat, with a dramatic increase in cases driven by climate change, urbanization, and mosquito resistance. In Pakistan, a country with a population of 240 million, the world's fifth largest, dengue has emerged as an escalating public health crisis, with seasonal outbreaks severely straining the healthcare system. Despite decades of vector control efforts, there has not been much success, necessitating the introduction of dengue vaccination to boost population immunity. Recent advancements in vaccine development demonstrate promising efficacy and safety profiles, even in dengue-naive individuals. Implementing a dengue vaccination program in Pakistan could significantly reduce the disease burden, lower healthcare costs, and prevent future outbreaks. Integrating vaccination with existing public health initiatives can achieve high coverage and improve overall public health outcomes.
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Affiliation(s)
- Somia Iqtadar
- Dengue Expert Advisory Group, Lahore 54000, Pakistan;
- Department of Medicine, King Edward Medical University, Lahore 54000, Pakistan
- Pakistan Society of Internal Medicine (PSIM), Lahore 54000, Pakistan;
- Asia Dengue Voice & Action Next Generation (ADVA NexGen) Group, 8 Fleming Road, Wanchai, Hong Kong, China
| | - Javed Akram
- Pakistan Society of Internal Medicine (PSIM), Lahore 54000, Pakistan;
| | - Amjad Khan
- Pakistan Society of Internal Medicine (PSIM), Lahore 54000, Pakistan;
- Department of Oncology, University of Oxford, Oxford OX3 7DQ, UK
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38
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Jansen van Vuren P, Parry RH, Pawęska JT. Detection of Dengue Virus 1 and Mammalian Orthoreovirus 3, with Novel Reassortments, in a South African Family Returning from Thailand, 2017. Viruses 2024; 16:1274. [PMID: 39205247 PMCID: PMC11358982 DOI: 10.3390/v16081274] [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: 06/28/2024] [Revised: 08/06/2024] [Accepted: 08/07/2024] [Indexed: 09/04/2024] Open
Abstract
In July 2017, a family of three members, a 46-year-old male, a 45-year-old female and their 8-year-old daughter, returned to South Africa from Thailand. They presented symptoms consistent with mosquito-borne diseases, including fever, headache, severe body aches and nausea. Mosquito bites in all family members suggested recent exposure to arthropod-borne viruses. Dengue virus 1 (Genus Orthoflavivirus) was isolated (isolate no. SA397) from the serum of the 45-year-old female via intracerebral injection in neonatal mice and subsequent passage in VeroE6 cells. Phylogenetic analysis of this strain indicated close genetic identity with cosmopolitan genotype 1 DENV1 strains from Southeast Asia, assigned to major lineage K, minor lineage 1 (DENV1I_K.1), such as GZ8H (99.92%) collected in November 2018 from China, and DV1I-TM19-74 isolate (99.72%) identified in Bangkok, Thailand, in 2019. Serum samples from the 46-year-old male yielded a virus isolate that could not be confirmed as DENV1, prompting unbiased metagenomic sequencing for virus identification and characterization. Illumina sequencing identified multiple segments of a mammalian orthoreovirus (MRV), designated as Human/SA395/SA/2017. Genomic and phylogenetic analyses classified Human/SA395/SA/2017 as MRV-3 and assigned a tentative genotype, MRV-3d, based on the S1 segment. Genomic analyses suggested that Human/SA395/SA/2017 may have originated from reassortments of segments among swine, bat, and human MRVs. The closest identity of the viral attachment protein σ1 (S1) was related to a human isolate identified from Tahiti, French Polynesia, in 1960. This indicates ongoing circulation and co-circulation of Southeast Asian and Polynesian strains, but detailed knowledge is hampered by the limited availability of genomic surveillance. This case represents the rare concurrent detection of two distinct viruses with different transmission routes in the same family with similar clinical presentations. It highlights the complexity of diagnosing diseases with similar sequelae in travelers returning from tropical areas.
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Affiliation(s)
- Petrus Jansen van Vuren
- Australian Centre for Disease Preparedness, CSIRO Australian Animal Health Laboratory, Private Bag 24, Geelong, VIC 3220, Australia
- Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2131, South Africa;
| | - Rhys H. Parry
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane, QLD 4072, Australia;
| | - Janusz T. Pawęska
- Centre for Emerging Zoonotic and Parasitic Diseases, National Institute for Communicable Diseases, National Health Laboratory Service, Johannesburg 2131, South Africa;
- Centre for Viral Zoonoses, Department of Medical Virology, Faculty of Health Sciences, University of Pretoria, Pretoria 0001, South Africa
- Faculty of Health Sciences, School of Pathology, University of Witwatersrand, Johannesburg 2050, South Africa
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Wilastonegoro NN, Andriani S, Sebong PH, Agarwal-Harding P, Shepard DS. Estimating dengue disease and economic burden to inform municipal-level policymakers: Method for a pragmatic city-level observational cohort study. Gates Open Res 2024; 8:3. [PMID: 39221028 PMCID: PMC11362393 DOI: 10.12688/gatesopenres.15015.3] [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] [Accepted: 08/05/2024] [Indexed: 09/04/2024] Open
Abstract
Background Recent trials have confirmed the effectiveness of promising dengue control technologies - two vaccines and Wolbachia. These would generally be applied at the municipal level. To help local officials decide which, if any, control strategy to implement, they need affordable, timely, and accurate data on dengue burden. Building on our previous work in Mexico, Indonesia, and Thailand, we developed a streamlined prospective method to estimate dengue burden at the municipal level quickly, accurately, and efficiently. Methods The method entails enrolling and repeatedly interviewing 100 patients with laboratory-confirmed dengue. They will be selected after screening and testing about 1,000 patients with clinical dengue. The method will capture both acute and chronic effects relating to disease, economic burden, and psychological impacts (presenteeism). The total time requirements are 1.5 years, comprised of 0.25 years for planning and approvals, 1 year for data collection (a full dengue cycle), and 0 .25 years for data cleaning and analysis. A collaboration with municipal and academic colleagues in the city of Semarang, Central Java, Indonesia shows how the method could be readily applied in Indonesia's eighth largest city (population 1.8 million). Conclusions Many surveillance studies gather only information on numbers of cases. This proposed method will provide a comprehensive picture of the dengue burden to the health system, payers, and households at the local level.
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Affiliation(s)
- Nandyan N. Wilastonegoro
- Faculty of Medicine, Public Health, and Nursing, Gadjah Mada University, Yogyakarta, Special Region of Yogyakarta, 55281, Indonesia
| | - Sri Andriani
- Health Department, Government of Semarang City, Semarang, Central Java, 50249, Indonesia
| | - Perigrinus H. Sebong
- Faculty of Medicine, Soegijapranata Catholic University, Semarang, Central Java, 50215, Indonesia
| | - Priya Agarwal-Harding
- The Heller School for Social Policy and Management, Brandeis University, Waltham, Massachusetts, 02453, USA
| | - Donald S. Shepard
- The Heller School for Social Policy and Management, Brandeis University, Waltham, Massachusetts, 02453, USA
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Mushtaq I, Sarwar MS, Munzoor I. A comprehensive review of Wolbachia-mediated mechanisms to control dengue virus transmission in Aedes aegypti through innate immune pathways. Front Immunol 2024; 15:1434003. [PMID: 39176079 PMCID: PMC11338905 DOI: 10.3389/fimmu.2024.1434003] [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: 05/17/2024] [Accepted: 07/16/2024] [Indexed: 08/24/2024] Open
Abstract
The Dengue virus (DENV), primarily spread by Aedes aegypti and also by Aedes albopictus in some regions, poses significant global health risks. Alternative techniques are urgently needed because the current control mechanisms are insufficient to reduce the transmission of DENV. Introducing Wolbachia pipientis into Ae. aegypti inhibits DENV transmission, however, the underlying mechanisms are still poorly understood. Innate immune effector upregulation, the regulation of autophagy, and intracellular competition between Wolbachia and DENV for lipids are among the theories for the mechanism of inhibition. Furthermore, mainly three immune pathways Toll, IMD, and JAK/STAT are involved in the host for the suppression of the virus. These pathways are activated by Wolbachia and DENV in the host and are responsible for the upregulation and downregulation of many genes in mosquitoes, which ultimately reduces the titer of the DENV in the host. The functioning of these immune pathways depends upon the Wolbachia, host, and virus interaction. Here, we summarize the current understanding of DENV recognition by the Ae. aegypti's immune system, aiming to create a comprehensive picture of our knowledge. Additionally, we investigated how Wolbachia regulates the activation of multiple genes associated with immune priming for the reduction of DENV.
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Gerninghaus J, Zhubi R, Krämer A, Karim M, Tran DHN, Joerger AC, Schreiber C, Berger LM, Berger BT, Ehret TAL, Elson L, Lenz C, Saxena K, Müller S, Einav S, Knapp S, Hanke T. Back-Pocket Optimization of 2-Aminopyrimidine-Based Macrocycles Leads to Potent EPHA2/GAK Kinase Inhibitors. J Med Chem 2024; 67:12534-12552. [PMID: 39028937 DOI: 10.1021/acs.jmedchem.4c00411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2024]
Abstract
Macrocyclization of acyclic compounds is a powerful strategy for improving inhibitor potency and selectivity. Here we have optimized 2-aminopyrimidine-based macrocycles to use these compounds as chemical tools for the ephrin kinase family. Starting with a promiscuous macrocyclic inhibitor, 6, we performed a structure-guided activity relationship and selectivity study using a panel of over 100 kinases. The crystal structure of EPHA2 in complex with the developed macrocycle 23 provided a basis for further optimization by specifically targeting the back pocket, resulting in compound 55, a potent inhibitor of EPHA2/A4 and GAK. Subsequent front-pocket derivatization resulted in an interesting in cellulo selectivity profile, favoring EPHA4 over the other ephrin receptor kinase family members. The dual EPHA2/A4 and GAK inhibitor 55 prevented dengue virus infection of Huh7 liver cells. However, further investigations are needed to determine whether this was a compound-specific effect or target-related.
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Affiliation(s)
- Joshua Gerninghaus
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Rezart Zhubi
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Andreas Krämer
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Marwah Karim
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, and Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Do Hoang Nhu Tran
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, and Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California 94305, United States
| | - Andreas C Joerger
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Christian Schreiber
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Lena M Berger
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Benedict-Tilman Berger
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Theresa A L Ehret
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Lewis Elson
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Christopher Lenz
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Krishna Saxena
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Susanne Müller
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Shirit Einav
- Department of Medicine, Division of Infectious Diseases and Geographic Medicine, and Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, California 94305, United States
- Chan Zuckerberg Biohub, 499 Illinois St, San Francisco, California 94158, United States
| | - Stefan Knapp
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
| | - Thomas Hanke
- Institute of Pharmaceutical Chemistry, Goethe University, Max-von-Laue-Str. 9, Frankfurt am Main 60438, Germany
- Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Max-von-Laue-Str. 15, Frankfurt am Main 60438, Germany
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Henriques P, Caldeira-Araújo H, Brazão MDL, Abreu AM, Vigário AM, Rosa A. Primary Dengue and Long-Term Health Status in Madeira Island, Portugal: A Retrospective Questionnaire-Based Study. Am J Trop Med Hyg 2024; 111:403-411. [PMID: 38955194 PMCID: PMC11310610 DOI: 10.4269/ajtmh.23-0502] [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: 07/30/2023] [Accepted: 03/18/2024] [Indexed: 07/04/2024] Open
Abstract
Dengue is among the most important mosquito-borne viral diseases worldwide. Although its acute manifestations are well known, little is known about the long-term impact of dengue on the population's health status. Madeira Island experienced a single outbreak of autochthonous dengue from September 2012 to March 2013. To extend our knowledge about the clinical impact of the outbreak on this naive population, we applied an online questionnaire to 168 adults diagnosed with dengue at the time to characterize retrospectively their symptoms during the infection and to identify long-term manifestations, possibly triggered by dengue. The most frequent symptoms during the clinical period, reported by more than three-quarters of our participants, were fever, myalgia, extreme tiredness, and headaches, whereas vomiting, pruritus, nausea, retro-orbital pain, and arthralgia occurred in 35% to 50% of participants. In the 8 years after dengue, 61.5% of participants reported at least one recurrent previously nonexistent symptom, the most frequent being headaches, abundant hair loss, extreme tiredness, arthralgia, and myalgia, experienced by 25% to 35% of participants. Nearly 20% of the participants with persistent symptoms reported the onset of chronic illness in the 4 years after dengue, most frequently ophthalmological and autoimmune diseases (5.6% each), versus only 2.2% of chronic disease onset in participants without persistent symptoms. Our results suggest that the occurrence of persistent symptoms after primary dengue might be more frequent than anticipated and may persist for several years, having an impact on the health status and well-being of a considerable proportion of the infected population.
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Affiliation(s)
- Paulo Henriques
- Projeto Medicina, Faculdade de Ciências da Vida, Universidade da Madeira, Funchal, Portugal
| | - Helena Caldeira-Araújo
- Projeto Medicina, Faculdade de Ciências da Vida, Universidade da Madeira, Funchal, Portugal
- CQM-Centro de Química da Madeira, Universidade da Madeira, Funchal, Portugal
| | - Maria da Luz Brazão
- Projeto Medicina, Faculdade de Ciências da Vida, Universidade da Madeira, Funchal, Portugal
- Serviço de Medicina Interna, Hospital Central do Funchal, SESARAM-EPERAM, Funchal, Portugal
| | - Ana Maria Abreu
- Departamento de Matemática, Faculdade de Ciências Exatas e da Engenharia, Universidade da Madeira, Funchal, Portugal
- Centro de Investigação em Matemática e Aplicações, Universidade de Évora, Évora, Portugal
| | - Ana Margarida Vigário
- Projeto Medicina, Faculdade de Ciências da Vida, Universidade da Madeira, Funchal, Portugal
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Alexandra Rosa
- Projeto Medicina, Faculdade de Ciências da Vida, Universidade da Madeira, Funchal, Portugal
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Nath A, Gangopadhayya A, Ghuge O, Kumar S, Ramdasi A, Karlekar S, Sudeep AB, Lole KS. Determination of Species Identity and Genetic Diversity of Aedes aegypti and Other Medically Important Mosquitoes of India Using DNA Barcoding. Am J Trop Med Hyg 2024; 111:324-332. [PMID: 38955202 PMCID: PMC11310601 DOI: 10.4269/ajtmh.23-0471] [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: 07/18/2023] [Accepted: 04/01/2024] [Indexed: 07/04/2024] Open
Abstract
Aedes aegypti-borne viruses (i.e., dengue, chikungunya, and Zika) have become endemic to India, posing a severe threat to public health. Vector control remains the mainstay of disease management due to nonavailability of licensed vaccines/therapeutics. Conventional morpho-taxonomical methods cannot differentiate between closely related sibling species or species complexes, and hence we evaluated two molecular markers, mitochondrial cytochrome c oxidase subunit 1 (Cox1) and nuclear DNA internal transcribed spacer 2 (-2) gene sequences, to characterize seven populations of Ae. aegypti and four medically important mosquito species (Aedes albopictus, Anopheles stephensi, Culex tritaeniorhyncus, and Culex murrelli). DNA extracted from the 11 mosquito populations (two mosquitoes per population) was polymerase chain reaction amplified, sequenced, and analyzed. Molecular characterization was found to be congruent with morphological identification, suggesting no variants or cryptic species exist in Ae. aegypti and the other mosquitoes studied. Phylogenetic analysis with sequences obtained with Cox1 gene of Ae. aegypti and other Aedes and non-Aedes mosquito species showed clustering of sequences from different species representing different clades, distinctly separating one taxon from the other, whereas ITS-2 sequences of Aedes aegypti from across the world clustered tightly. Nucleotide divergence values revealed a low percentage of intraspecies variation and a higher percentage of interspecies variation. The present study authenticates the applicability of Cox1 and ITS-2 in the precise identification of Ae. aegypti mosquitoes against cryptic or sibling species. Cox1 appeared to be a more reliable marker because it showed distinct clustering of mosquito species, and some sequence variations to represent genetic diversity.
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Affiliation(s)
- Amol Nath
- Indian Council of Medical Research-National Institute of Virology, Pune, India
- Department of Community Medicine, Armed Forces Medical College, Pune, India
| | - Abhranil Gangopadhayya
- Department of Hepatitis, Indian Council of Medical Research-National Institute of Virology, Pune, India
| | - Onkar Ghuge
- Department of Hepatitis, Indian Council of Medical Research-National Institute of Virology, Pune, India
| | - Surendra Kumar
- Department of Medical Entomology & Zoology, Indian Council of Medical Research-National Institute of Virology, Pune, India
| | - Ashwini Ramdasi
- Department of Hepatitis, Indian Council of Medical Research-National Institute of Virology, Pune, India
| | | | - Anakkathil B. Sudeep
- Department of Medical Entomology & Zoology, Indian Council of Medical Research-National Institute of Virology, Pune, India
| | - Kavita S. Lole
- Department of Hepatitis, Indian Council of Medical Research-National Institute of Virology, Pune, India
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Knoblauch S, Su Yin M, Chatrinan K, de Aragão Rocha AA, Haddawy P, Biljecki F, Lautenbach S, Resch B, Arifi D, Jänisch T, Morales I, Zipf A. High-resolution mapping of urban Aedes aegypti immature abundance through breeding site detection based on satellite and street view imagery. Sci Rep 2024; 14:18227. [PMID: 39107395 PMCID: PMC11303731 DOI: 10.1038/s41598-024-67914-w] [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: 11/30/2023] [Accepted: 07/17/2024] [Indexed: 08/10/2024] Open
Abstract
Identification of Aedes aegypti breeding hotspots is essential for the implementation of targeted vector control strategies and thus the prevention of several mosquito-borne diseases worldwide. Training computer vision models on satellite and street view imagery in the municipality of Rio de Janeiro, we analyzed the correlation between the density of common breeding grounds and Aedes aegypti infestation measured by ovitraps on a monthly basis between 2019 and 2022. Our findings emphasized the significance (p ≤ 0.05) of micro-habitat proxies generated through object detection, allowing to explain high spatial variance in urban abundance of Aedes aegypti immatures. Water tanks, non-mounted car tires, plastic bags, potted plants, and storm drains positively correlated with Aedes aegypti egg and larva counts considering a 1000 m mosquito flight range buffer around 2700 ovitrap locations, while dumpsters, small trash bins, and large trash bins exhibited a negative association. This complementary application of satellite and street view imagery opens the pathway for high-resolution interpolation of entomological surveillance data and has the potential to optimize vector control strategies. Consequently it supports the mitigation of emerging infectious diseases transmitted by Aedes aegypti, such as dengue, chikungunya, and Zika, which cause thousands of deaths each year.
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Affiliation(s)
- Steffen Knoblauch
- GIScience Chair, Heidelberg University, 69120, Heidelberg, Germany.
- Interdisciplinary Center of Scientific Computing, Heidelberg University, 69120, Heidelberg, Germany.
- Heidelberg Institute for Geoinformation Technology, 69118, Heidelberg, Germany.
| | - Myat Su Yin
- Faculty of ICT, Mahidol University, 73170, Nakhon Pathom, Thailand
| | | | | | - Peter Haddawy
- Faculty of ICT, Mahidol University, 73170, Nakhon Pathom, Thailand
- Bremen Spatial Cognition Center, University of Bremen, 28359, Bremen, Germany
| | - Filip Biljecki
- Department of Architecture, National University of Singapore, 117566, Singapore, Singapore
- Department of Real Estate, National University of Singapore, 119245, Singapore, Singapore
| | - Sven Lautenbach
- Heidelberg Institute for Geoinformation Technology, 69118, Heidelberg, Germany
| | - Bernd Resch
- Geo-social Analytics Lab, Paris Lodron University of Salzburg, 5020, Salzburg, Austria
- Center for Geographic Analysis, Harvard University, 02138, Cambridge, USA
| | - Dorian Arifi
- Geo-social Analytics Lab, Paris Lodron University of Salzburg, 5020, Salzburg, Austria
| | - Thomas Jänisch
- Colorado School of Public Health, University of Colorado Anschutz Medical Campus, 80045, Aurora, USA
- Heidelberg Institute of Global Health, Heidelberg University Hospital, 69120, Heidelberg, Germany
| | - Ivonne Morales
- Colorado School of Public Health, University of Colorado Anschutz Medical Campus, 80045, Aurora, USA
| | - Alexander Zipf
- GIScience Chair, Heidelberg University, 69120, Heidelberg, Germany
- Interdisciplinary Center of Scientific Computing, Heidelberg University, 69120, Heidelberg, Germany
- Heidelberg Institute for Geoinformation Technology, 69118, Heidelberg, Germany
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45
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Romero-Cruz VA, Ramos-Ligonio A, García-Alejandro K, Cerecedo-García M, Lagunes-Castro MDLS, López-Monteon A. Immunization of recombinant NS3 protein (protease region) of dengue virus induces high levels of CTLA-4 and apoptosis in splenocytes of BALB/c mice. Virus Genes 2024:10.1007/s11262-024-02095-2. [PMID: 39102085 DOI: 10.1007/s11262-024-02095-2] [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: 02/09/2024] [Accepted: 07/29/2024] [Indexed: 08/06/2024]
Abstract
DENV infection outcomes depend on the host's variable expression of immune receptors and mediators, leading to either resolution or exacerbation. While the NS3 protein is known to induce robust immune responses, the specific impact of its protease region epitopes remains unclear. This study investigated the effect of recombinant NS3 protease region proteins from all four DENV serotypes on splenocyte activation in BALB/c mice (n = 5/group). Mice were immunized with each protein, and their splenocytes were subsequently stimulated with homologous antigens. We measured the expression of costimulatory molecules (CD28, CD80, CD86, CD152) by flow cytometry, along with IL-2 production, CD25 expression, and examined the antigen-specific activation of CD4 + and CD8 + T cells. Additionally, the expression of IL-1, IL-10, and TGF-β1 in splenocytes from immunized animals was assessed. Apoptosis was evaluated using Annexin V/PI staining and DNA fragmentation analysis. Stimulation of splenocytes from immunized mice triggered apoptosis (phosphatidylserine exposure and caspase 3/7 activation) and increased costimulatory molecule expression, particularly CD152. Low IL-2 production and low CD25 expression, as well as sustained expression of the IL-10 gene. These results suggest that these molecules might be involved in mechanisms by which the NS3 protein contributes to viral persistence and disease pathogenesis.
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Affiliation(s)
- Víctor Adolfo Romero-Cruz
- Doctorado en Ciencias Biomédicas, Universidad Veracruzana, Luis Castelazo, Animas, 91190, Xalapa, Veracruz, Mexico
| | - Angel Ramos-Ligonio
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Edificio D, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
| | - Karen García-Alejandro
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Edificio D, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
- Maestría en Procesos Biológicos, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
| | - Melissa Cerecedo-García
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Edificio D, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
- Maestría en Procesos Biológicos, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
| | - María de la Soledad Lagunes-Castro
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Edificio D, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico
| | - Aracely López-Monteon
- LADISER Inmunología y Biología Molecular, Facultad de Ciencias Químicas, Edificio D, Universidad Veracruzana, Prolongación de Oriente 6 No. 1009, Col. Rafael Alvarado, 94340, Orizaba, Veracruz, Mexico.
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Nogueira ML, Cintra MAT, Moreira JA, Patiño EG, Braga PE, Tenório JCV, de Oliveira Alves LB, Infante V, Silveira DHR, de Lacerda MVG, Pereira DB, da Fonseca AJ, Gurgel RQ, Coelho ICB, Fontes CJF, Marques ETA, Romero GAS, Teixeira MM, Siqueira AM, Boaventura VS, Ramos F, Júnior EE, de Moraes JC, Whitehead SS, Esteves-Jaramillo A, Shekar T, Lee JJ, Macey J, Kelner SG, Coller BAG, Boulos FC, Kallás EG. Efficacy and safety of Butantan-DV in participants aged 2-59 years through an extended follow-up: results from a double-blind, randomised, placebo-controlled, phase 3, multicentre trial in Brazil. THE LANCET. INFECTIOUS DISEASES 2024:S1473-3099(24)00376-1. [PMID: 39116904 DOI: 10.1016/s1473-3099(24)00376-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 08/10/2024]
Abstract
BACKGROUND A single-dose dengue vaccine that protects individuals across a wide age range and regardless of dengue serostatus is an unmet need. We assessed the safety and efficacy of the live, attenuated, tetravalent Butantan-dengue vaccine (Butantan-DV) in adults, adolescents, and children. We previously reported the primary and secondary efficacy and safety endpoints in the initial 2 years of follow-up. Here we report the results through an extended follow-up period, with an average of 3·7 years of follow-up. METHODS In this double-blind, randomised, placebo-controlled, phase 3, multicentre trial in Brazil, healthy participants (aged 2-59 years) who had not previously received a dengue vaccine were enrolled and randomly assigned 2:1 (stratified by age 18-59 years, 7-17 years, and 2-6 years) using a central electronic randomisation system to receive 0·5 mL of Butantan-DV (containing approximately 103 plaque-forming units of each of the four vaccine virus strains) or placebo, administered subcutaneously. Syringes containing vaccine or placebo were prepared by an unmasked trial pharmacist who was not involved in any subsequent participant assessments; other site staff and the participants remained unaware of the group allocations. Vaccine efficacy was calculated with the accrual of virologically confirmed dengue (VCD) cases (by RT-PCR) at least 28 days after vaccination up until the cutoff (at least 2 years of follow-up from the last participant enrolled). The primary endpoint was vaccine efficacy against VCD after day 28 by any dengue virus (DENV) serotype regardless of dengue serostatus at baseline in the per-protocol population. The primary and secondary safety endpoints up until day 21 were previously reported; secondary safety endpoints include the frequency of unsolicited vaccine-related adverse events after day 22. Safety analyses were done on all participants as treated. This trial is registered with ClinicalTrials.gov (NCT02406729) and is ongoing. FINDINGS Of 16 363 participants assessed for eligibility, 16 235 were randomly assigned between Feb 22, 2016, and July 5, 2019, and received single-dose Butantan-DV (10 259 participants) or placebo (5976 participants). 16 162 participants (Butantan-DV n=10 215; placebo n=5947) were included in the per-protocol population and 16 235 (Butantan-DV n=10 259; placebo n=5976) in the safety population. At the data cutoff (July 13, 2021), participants had 2-5 years of follow-up (mean 3·7 years [SD 1·0], median 4·0 years [IQR 3·2-4·5]). 356 VCD cases were captured through the follow-up (128 in the vaccine group and 228 in the placebo group). Vaccine efficacy against VCD caused by any DENV serotype was 67·3% (95% CI 59·4-73·9); cases caused by DENV-3 or DENV-4 were not observed. The proportions of participants who had serious adverse events were similar between treatment groups (637 [6·2%] in the vaccine group and 395 [6·6%] in the placebo group) up until the cutoff. INTERPRETATION A single dose of Butantan-DV was generally well tolerated and efficacious against symptomatic VCD (caused by DENV-1 and DENV-2) for a mean of 3·7 years. These findings support the continued development of Butantan-DV to prevent dengue disease in children, adolescents, and adults regardless of dengue serostatus. FUNDING Instituto Butantan and Merck Sharp & Dohme LLC, a subsidiary of Merck & Co. TRANSLATIONS For the Spanish and Portuguese translations of the abstract see Supplementary Materials section.
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Affiliation(s)
- Mauricio L Nogueira
- Faculdade de Medicina de São José do Rio Preto (FAMERP), São José do Rio Preto, Brazil; Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
| | | | | | | | | | | | | | | | | | | | | | | | - Ricardo Queiroz Gurgel
- Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal de Sergipe, Aracaju, Brazil
| | | | | | - Ernesto T A Marques
- Institute Aggeu Magalhães, Fundação Oswaldo Cruz, Recife, Brazil; School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | | | - Mauro Martins Teixeira
- Centre for Advanced and Innovative Therapies, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil; INCT-Dengue, Brazil
| | - André M Siqueira
- Instituto Nacional de Infectologia Evandro Chagas, Rio de Janeiro, Brazil
| | - Viviane Sampaio Boaventura
- Medicina e Saúde pública de Precisão, Fundação Oswaldo Cruz-Instituto Gonçalo Moniz (IGM/FIOCRUZ), Salvador, Brazil
| | - Fabiano Ramos
- Hospital São Lucas da PUC do Rio Grande do Sul, Porto Alegre, Brazil
| | - Erivaldo Elias Júnior
- Faculdade de Medicina da Universidade Federal de Mato Grosso do Sul (UFMS), Campo Grande, Brazil
| | - José Cassio de Moraes
- Departamento de Saúde Coletiva, Faculdade de Ciências Médicas Santa Casa de São Paulo, São Paulo, Brazil
| | - Stephen S Whitehead
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | | | | | | | | | | | | | | | - Esper G Kallás
- Instituto Butantan, São Paulo, Brazil; Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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Day ME, Puello YC, Mejía Sang ME, Diaz Brockmans EJ, Díaz Soto MF, Rivera Defilló SM, Taveras Cruz KM, Santiago Pérez JO, Meña R, Mota C, Hostetter MK, Muglia LJ, del Rey JG, Schlaudecker EP, Martin LJ, Simpson BN, Prada CE. Complete Blood Count Values Over Time in Young Children During the Dengue Virus Epidemic in the Dominican Republic From 2018 to 2020. BIOMED RESEARCH INTERNATIONAL 2024; 2024:3716786. [PMID: 39130533 PMCID: PMC11316910 DOI: 10.1155/2024/3716786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Revised: 07/09/2024] [Accepted: 07/13/2024] [Indexed: 08/13/2024]
Abstract
Background: Dengue fever (DF) is a mosquito-borne illness with substantial economic and societal impact. Understanding laboratory trends of hospitalized Dominican Republic (DR) pediatric patients could help develop screening procedures in low-resourced settings. We sought to describe laboratory findings over time in DR children with DF and DF severity from 2018 to 2020. Methods: Clinical information was obtained prospectively from recruited children with DF. Complete blood count (CBC) laboratory measures were assessed across Days 1-10 of fever. Participants were classified as DF-negative and DF-positive and grouped by severity. We assessed associations of DF severity with demographics, clinical characteristics, and peripheral blood studies. Using linear mixed-models, we assessed if hematologic values/trajectories differed by DF status/severity. Results: A total of 597 of 1101 with a DF clinical diagnosis were serologically evaluated, and 574 (471 DF-positive) met inclusion criteria. In DF, platelet count and hemoglobin were higher on earlier days of fever (p < = 0.0017). Eighty had severe DF. Severe DF risk was associated with thrombocytopenia, intraillness anemia, and leukocytosis, differing by fever day (p < = 0.001). Conclusions: In a pediatric hospitalized DR cohort, we found marked anemia in late stages of severe DF, unlike the typically seen hemoconcentration. These findings, paired with clinical symptom changes over time, may help guide risk-stratified screenings for resource-limited settings.
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Affiliation(s)
- Melissa E. Day
- Division of Infectious DiseasesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Yonairy Collado Puello
- School of MedicineInstituto Tecnológico de Santo Domingo, Santo Domingo, Dominican Republic
| | - Miguel E. Mejía Sang
- School of MedicineInstituto Tecnológico de Santo Domingo, Santo Domingo, Dominican Republic
| | | | - María F. Díaz Soto
- School of MedicineInstituto Tecnológico de Santo Domingo, Santo Domingo, Dominican Republic
| | | | - Karla M. Taveras Cruz
- School of MedicineInstituto Tecnológico de Santo Domingo, Santo Domingo, Dominican Republic
| | | | - Rafael Meña
- Department of PediatricsCentro de Obstetricia y Ginecología, Santo Domingo, Dominican Republic
| | - Cesár Mota
- Pediatric Emergency Medicine DepartmentHospital Infantil Dr. Robert Reid, Santo Domingo, Dominican Republic
| | - Margaret K. Hostetter
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Louis J. Muglia
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Human GeneticsCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Javier Gonzalez del Rey
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Pediatric Emergency MedicineCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Elizabeth P. Schlaudecker
- Division of Infectious DiseasesCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
| | - Lisa J. Martin
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Human GeneticsCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
| | - Brittany N. Simpson
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Human GeneticsCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- St. Jude Children's Research HospitalDepartment of PediatricsUniversity of Tennessee Health Science CenterLe Bonheur Children's Hospital, Memphis, Tennesse, USA
| | - Carlos E. Prada
- Department of PediatricsUniversity of Cincinnati College of Medicine, Cincinnati, Ohio, USA
- Division of Human GeneticsCincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
- Division of GeneticsBirth Defects & MetabolismAnn & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
- Department of PediatricsFeinberg School of Medicine of Northwestern University, Chicago, Illinois, USA
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Tung GA, Fonseca DM. Internal and external drivers interact to create highly dynamic mosquito blood-feeding behaviour. Proc Biol Sci 2024; 291:20241105. [PMID: 39196275 DOI: 10.1098/rspb.2024.1105] [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: 10/27/2023] [Revised: 07/24/2024] [Accepted: 07/26/2024] [Indexed: 08/29/2024] Open
Abstract
Blood-feeding, which is necessary for most female mosquitoes to reproduce, provides an opportunity for pathogen transmission. Blood-feeding is influenced by external factors such as light, temperature, humidity and intra- and inter-specific interactions. Physiologically, blood-feeding cycles are linked to nutritional conditions and governed by conserved hormonal signalling pathways that prepare mosquito sensory systems to locate and evaluate hosts. Human activities also alter mosquito blood-feeding behaviour through selection pressures such as insecticide usage, habitat and ecosystem alterations, and climate change. Notably, blood-feeding behaviour changes within a mosquito's lifespan, an underexplored phenomenon from an epidemiological standpoint. A review of the literature indicates that our understanding of mosquito biology and blood-feeding behaviour is predominantly based on studies of a handful of primarily tropical species. This focus likely skews our comprehension of the diversity of critical drivers of blood-feeding behaviour, especially under constraints imposed by harsh conditions. We found evidence of remarkable adaptability in blood-feeding and significant knowledge gaps regarding the determinants of host use. Specifically, epidemiological analyses assume host use is modified by external factors, while neglecting internal physiology. Integrating all significant factors is essential for developing effective models of mosquito-borne disease transmission in a rapidly changing world.
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Affiliation(s)
- Grayson A Tung
- Center for Vector Biology, Department of Entomology, Rutgers University, 180 Jones Avenue , New Brunswick, NJ 08901, USA
| | - Dina M Fonseca
- Center for Vector Biology, Department of Entomology, Rutgers University, 180 Jones Avenue , New Brunswick, NJ 08901, USA
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Goh JZH, De Hayr L, Khromykh AA, Slonchak A. The Flavivirus Non-Structural Protein 5 (NS5): Structure, Functions, and Targeting for Development of Vaccines and Therapeutics. Vaccines (Basel) 2024; 12:865. [PMID: 39203991 PMCID: PMC11360482 DOI: 10.3390/vaccines12080865] [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] [Received: 06/03/2024] [Revised: 07/20/2024] [Accepted: 07/27/2024] [Indexed: 09/03/2024] Open
Abstract
Flaviviruses, including dengue (DENV), Zika (ZIKV), West Nile (WNV), Japanese encephalitis (JEV), yellow fever (YFV), and tick-borne encephalitis (TBEV) viruses, pose a significant global emerging threat. With their potential to cause widespread outbreaks and severe health complications, the development of effective vaccines and antiviral therapeutics is imperative. The flaviviral non-structural protein 5 (NS5) is a highly conserved and multifunctional protein that is crucial for viral replication, and the NS5 protein of many flaviviruses has been shown to be a potent inhibitor of interferon (IFN) signalling. In this review, we discuss the functions of NS5, diverse NS5-mediated strategies adopted by flaviviruses to evade the host antiviral response, and how NS5 can be a target for the development of vaccines and antiviral therapeutics.
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Affiliation(s)
| | | | | | - Andrii Slonchak
- Australian Infectious Diseases Research Center, School of Chemistry and Molecular Biosciences, The University of Queensland, St. Lucia, QLD 4072, Australia; (J.Z.H.G.); (L.D.H.); (A.A.K.)
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50
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Rotejanaprasert C, Armatrmontree P, Chienwichai P, Maude RJ. Perspectives and challenges in developing and implementing integrated dengue surveillance tools and technology in Thailand: a qualitative study. PLoS Negl Trop Dis 2024; 18:e0012387. [PMID: 39141623 PMCID: PMC11324148 DOI: 10.1371/journal.pntd.0012387] [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: 01/23/2024] [Accepted: 07/18/2024] [Indexed: 08/16/2024] Open
Abstract
BACKGROUND Dengue remains a persistent public health concern, especially in tropical and sub-tropical countries like Thailand. The development and utilization of quantitative tools and information technology show significant promise for enhancing public health policy decisions in integrated dengue control. However, the effective implementation of these tools faces multifaceted challenges and barriers that are relatively underexplored. METHODS This qualitative study employed in-depth interviews to gain a better understanding of the experiences and challenges of quantitative tool development and implementation with key stakeholders involved in dengue control in Thailand, using a phenomenological framework. A diverse range of participants, including public health workers and dengue control experts, participated in these interviews. The collected interview data were systematically managed and investigated using thematic analysis to extract meaningful insights. RESULTS The ability to collect dengue surveillance data and conduct ongoing analyses were contingent upon the availability of individuals possessing essential digital literacy and analytical skills, which were often in short supply. Furthermore, effective space-time early warning and precise data collection were hindered by the absence of user-friendly tools, efficient reporting systems, and complexities in data integration. Additionally, the study underscored the importance of the crucial role of community involvement and collaboration among organizations involved in integrated dengue surveillance, control and quantitative tool development. CONCLUSIONS This study employed a qualitative approach to gain a deeper understanding of the contextual intricacies surrounding the development and implementation of quantitative tools, which, despite their potential for strengthening public health policy decisions in dengue control, remain relatively unexplored in the Thai context. The findings yield valuable insights and recommendations for the development and utilization of quantitative tools to support dengue control in Thailand. This information also has the potential to support use of such tools to exert impact beyond dengue to a broader spectrum of diseases.
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Affiliation(s)
- Chawarat Rotejanaprasert
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | | | - Peerut Chienwichai
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand
| | - Richard J. Maude
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- The Open University, Milton Keynes, United Kingdom
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