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Filipović I, Marshall JM, Rašić G. Finding divergent sequences of homomorphic sex chromosomes via diploidized nanopore-based assembly from a single male. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.02.29.582759. [PMID: 38464271 PMCID: PMC10925256 DOI: 10.1101/2024.02.29.582759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Although homomorphic sex chromosomes can have non-recombining regions with elevated sequence divergence between its complements, such divergence signals can be difficult to detect bioinformatically. If found in genomes of e.g. insect pests, these sequences could be targeted by the engineered genetic sexing and control systems. Here, we report an approach that can leverage long-read nanopore sequencing of a single XY male to identify divergent regions of homomorphic sex chromosomes. Long-read data are used for de novo genome assembly that is diploidized in a way that maximizes sex-specific differences between its haploid complements. We show that the correct assembly phasing is supported by the mapping of nanopore reads from the male's haploid Y-bearing sperm cells. The approach revealed a highly divergent region (HDR) near the centromere of the homomorphic sex chromosome of Aedes aegypti, the most important arboviral vector, for which there is a great interest in creating new genetic control tools. HDR is located ~5Mb downstream of the known male-determining locus on chromosome 1 and is significantly enriched for ovary-biased genes. While recombination in HDR ceased relatively recently (~1.4 MYA), HDR gametologs have divergent exons and introns of protein coding genes, and most lncRNA genes became X-specific. Megabases of previously invisible sex-linked sequences provide new putative targets for engineering the genetic systems to control this deadly mosquito. Broadly, our approach expands the toolbox for studying cryptic structure of sex chromosomes.
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Affiliation(s)
- Igor Filipović
- Mosquito Genomics, QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston QLD 4006, Australia
- The University of Queensland, School of Biological Sciences, St Lucia, QLD, Australia
| | - John M Marshall
- Divisions of Biostatistics and Epidemiology, School of Public Health, University of California, Berkeley, CA, USA
- Innovative Genomics Institute, University of California, Berkeley, CA, USA
| | - Gordana Rašić
- Mosquito Genomics, QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston QLD 4006, Australia
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Aldridge RL, Gibson S, Linthicum KJ. Aedes aegypti Controls AE. Aegypti: SIT and IIT-An Overview. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2024; 40:32-49. [PMID: 38427588 DOI: 10.2987/23-7154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Abstract
The sterile insect technique (SIT) and the incompatible insect technique (IIT) are emerging and potentially revolutionary tools for controlling Aedes aegypti (L.), a prominent worldwide mosquito vector threat to humans that is notoriously difficult to reduce or eliminate in intervention areas using traditional integrated vector management (IVM) approaches. Here we provide an overview of the discovery, development, and application of SIT and IIT to Ae. aegypti control, and innovations and advances in technology, including transgenics, that could elevate these techniques to a worldwide sustainable solution to Ae. aegypti when combined with other IVM practices.
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Finda MF, Juma EO, Kahamba NF, Mthawanji RS, Sambo M, Emidi B, Wiener S, O'Brochta D, Santos M, James S, Okumu FO. Perspectives of African stakeholders on gene drives for malaria control and elimination: a multi-country survey. Malar J 2023; 22:384. [PMID: 38129897 PMCID: PMC10740233 DOI: 10.1186/s12936-023-04787-w] [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: 09/13/2023] [Accepted: 11/09/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND Gene drive modified mosquitoes (GDMMs) have the potential to address Africa's persistent malaria problem, but are still in early stages of development and testing. Continuous engagement of African stakeholders is crucial for successful evaluation and implementation of these technologies. The aim of this multi-country study was, therefore, to explore the insights and recommendations of key stakeholders across Africa on the potential of GDMMs for malaria control and elimination in the continent. METHODS A concurrent mixed-methods study design was used, involving a structured survey administered to 180 stakeholders in 25 countries in sub-Saharan Africa, followed by 18 in-depth discussions with selected groups and individuals. Stakeholders were drawn from academia, research and regulatory institutions, government ministries of health and environment, media and advocacy groups. Thematic content analysis was used to identify key topics from the in-depth discussions, and descriptive analysis was done to summarize information from the survey data. RESULTS Despite high levels of awareness of GDMMs among the stakeholders (76.7%), there was a relatively low-level of understanding of their key attributes and potential for malaria control (28.3%). When more information about GDMMs was provided to the stakeholders, they readily discussed their insights and concerns, and offered several recommendations to ensure successful research and implementation of the technology. These included: (i) increasing relevant technical expertise within Africa, (ii) generating local evidence on safety, applicability, and effectiveness of GDMMs, and (iii) developing country-specific regulations for safe and effective governance of GDMMs. A majority of the respondents (92.9%) stated that they would support field trials or implementation of GDMMs in their respective countries. This study also identified significant misconceptions regarding the phase of GDMM testing in Africa, as several participants incorrectly asserted that GDMMs were already present in Africa, either within laboratories or released into the field. CONCLUSION Incorporating views and recommendations of African stakeholders in the ongoing research and development of GDMMs is crucial for instilling stakeholder confidence on their potential application. These findings will enable improved planning for GDMMs in Africa as well as improved target product profiles for the technologies to maximize their potential for solving Africa's enduring malaria challenge.
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Affiliation(s)
- Marceline F Finda
- Environmental Health and Ecological Sciences, Ifakara Health Institute, PO Box 53, Ifakara, Tanzania.
| | - Elijah O Juma
- Pan-African Mosquito Control Association (PAMCA), Off Mbagathi Road, PO Box 44455-00100, Nairobi, Kenya
| | - Najat F Kahamba
- Environmental Health and Ecological Sciences, Ifakara Health Institute, PO Box 53, Ifakara, Tanzania
| | - Rhosheen S Mthawanji
- Malawi Liverpool Wellcome Trust Clinical Research Programme, Blantyre 3, PO Box 30096, Chichiri, Malawi
| | - Maganga Sambo
- Environmental Health and Ecological Sciences, Ifakara Health Institute, PO Box 53, Ifakara, Tanzania
| | - Basiliana Emidi
- National Institute for Medical Research, PO Box 1462, Mwanza, Tanzania
| | - Susan Wiener
- Foundation for the National Institutes of Health, 11400 Rockville Pike, Suite 600, North Bethesda, MD, 20852, USA
| | - David O'Brochta
- Foundation for the National Institutes of Health, 11400 Rockville Pike, Suite 600, North Bethesda, MD, 20852, USA
| | - Michael Santos
- Foundation for the National Institutes of Health, 11400 Rockville Pike, Suite 600, North Bethesda, MD, 20852, USA
| | - Stephanie James
- Foundation for the National Institutes of Health, 11400 Rockville Pike, Suite 600, North Bethesda, MD, 20852, USA
| | - Fredros O Okumu
- Environmental Health and Ecological Sciences, Ifakara Health Institute, PO Box 53, Ifakara, Tanzania
- School of Life Science and Bioengineering, The Nelson Mandela African Institution of Science and Technology, P. O. Box 447, Arusha, Tanzania
- School of Biodiversity, One Health and Veterinary Medicine, University of Glasgow, Glasgow, G128QQ, UK
- School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, 1 Smuts Avenue, Braamofontein, 2000, South Africa
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4
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Wang C, Wang J, Lu J, Xiong Y, Zhao Z, Yu X, Zheng X, Li J, Lin Q, Ren Y, Hu Y, He X, Li C, Zeng Y, Miao R, Guo M, Zhang B, Zhu Y, Zhang Y, Tang W, Wang Y, Hao B, Wang Q, Cheng S, He X, Yao B, Gao J, Zhu X, Yu H, Wang Y, Sun Y, Zhou C, Dong H, Ma X, Guo X, Liu X, Tian Y, Liu S, Wang C, Cheng Z, Jiang L, Zhou J, Guo H, Jiang L, Tao D, Chai J, Zhang W, Wang H, Wu C, Wan J. A natural gene drive system confers reproductive isolation in rice. Cell 2023; 186:3577-3592.e18. [PMID: 37499659 DOI: 10.1016/j.cell.2023.06.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 02/02/2023] [Accepted: 06/28/2023] [Indexed: 07/29/2023]
Abstract
Hybrid sterility restricts the utilization of superior heterosis of indica-japonica inter-subspecific hybrids. In this study, we report the identification of RHS12, a major locus controlling male gamete sterility in indica-japonica hybrid rice. We show that RHS12 consists of two genes (iORF3/DUYAO and iORF4/JIEYAO) that confer preferential transmission of the RHS12-i type male gamete into the progeny, thereby forming a natural gene drive. DUYAO encodes a mitochondrion-targeted protein that interacts with OsCOX11 to trigger cytotoxicity and cell death, whereas JIEYAO encodes a protein that reroutes DUYAO to the autophagosome for degradation via direct physical interaction, thereby detoxifying DUYAO. Evolutionary trajectory analysis reveals that this system likely formed de novo in the AA genome Oryza clade and contributed to reproductive isolation (RI) between different lineages of rice. Our combined results provide mechanistic insights into the genetic basis of RI as well as insights for strategic designs of hybrid rice breeding.
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Affiliation(s)
- Chaolong Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jian Wang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiayu Lu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yehui Xiong
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Zhigang Zhao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaowen Yu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaoming Zheng
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jing Li
- Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650200, China
| | - Qibing Lin
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yulong Ren
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Yang Hu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaodong He
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Chao Li
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yonglun Zeng
- Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Rong Miao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Mali Guo
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Bosen Zhang
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ying Zhu
- Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Yunhui Zhang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Weijie Tang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yunlong Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Benyuan Hao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Qiming Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Siqi Cheng
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaojuan He
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Bowen Yao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Junwen Gao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xufei Zhu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Hao Yu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yong Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yan Sun
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Chunlei Zhou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Hui Dong
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaoding Ma
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xiuping Guo
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Xi Liu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Yunlu Tian
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Shijia Liu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Chunming Wang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhijun Cheng
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Ling Jiang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiawu Zhou
- Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650200, China
| | - Huishan Guo
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Liwen Jiang
- Centre for Cell & Developmental Biology and State Key Laboratory of Agrobiotechnology, School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Dayun Tao
- Food Crops Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650200, China
| | - Jijie Chai
- Beijing Advanced Innovation Center for Structural Biology, Tsinghua-Peking Joint Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Wei Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Haiyang Wang
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Chuanyin Wu
- State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
| | - Jianmin Wan
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Crop Gene Resources and Breeding, Institute of Crop Sciences, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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Cerasti F, Mastrantonio V, Dallai R, Cristofaro M, Porretta D. Applying Satyrization to Insect Pest Control: The Case of the Spotted Wing Drosophila, Drosophila suzukii Matsumura. INSECTS 2023; 14:569. [PMID: 37367385 DOI: 10.3390/insects14060569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 06/15/2023] [Accepted: 06/16/2023] [Indexed: 06/28/2023]
Abstract
Drosophila suzukii represents one of the major agricultural pests worldwide. The identification of safety and long-lasting tools to suppress its populations is therefore crucial to mitigate the environmental and economic damages due to its occurrence. Here, we explore the possibility of using satyrization as a tool to control the abundance of D. suzukii. By using males of D. melanogaster, we realized courtship tests, spermathecae analysis, and multiple-choice experiments to assess the occurrence and extent of pre- and post-zygotic isolation between the two species, as well as the occurrence of fitness costs in D. suzukii females due to satyrization. Our results showed that: (i) D. melanogaster males successfully courted D. suzukii females; (ii) D. melanogaster males significantly affected the total courtship time of D. suzukii males, which reduced from 22.6% to 6.4%; (iii) D. melanogaster males were able to inseminate D. suzukii and reduce their offspring, inducing a high fitness cost. Reproductive interference occurs at different steps between D. melanogaster and D. suzukii, both alone and in combination with other area-wide control approaches.
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Affiliation(s)
- Flavia Cerasti
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
| | | | - Romano Dallai
- Department of Life Sciences, University of Siena, Via A. Moro 2, 53100 Siena, Italy
| | | | - Daniele Porretta
- Department of Environmental Biology, Sapienza University of Rome, 00185 Rome, Italy
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Shin J, Rahman MM, Kim J, Marcombe S, Jung J. Genetic Diversity of Dengue Vector Aedes albopictus Collected from South Korea, Japan, and Laos. INSECTS 2023; 14:297. [PMID: 36975982 PMCID: PMC10051289 DOI: 10.3390/insects14030297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 06/18/2023]
Abstract
Aedes albopictus is native to Southeast Asia and has emerged as a major vector for vector-borne diseases that are spreading rapidly worldwide. Recent studies have shown that Ae. albopictus populations have different genetic groups dependent on their thermal adaptations; however, studies on Korean populations are limited. In this study, we analyzed the genetic diversity and structure of two mitochondrial genes (COI and ND5) and sixteen microsatellites in mosquitoes inhabiting Korea, Japan, and Laos. The results indicate that the Korean population has low genetic diversity, with an independent cluster distinct from the Laos population. Mixed clusters have also been observed in the Korean population. On the basis of these findings, two hypotheses are proposed. First, certain Korean populations are native. Second, some subpopulations that descended from the metapopulation (East Asian countries) were introduced to Japan before migrating to Korea. Furthermore, we previously demonstrated that Ae. albopictus appears to have been imported to Korea. In conclusion, the dengue-virus-carrying mosquitoes could migrate to Korea from Southeast Asian epidemic regions, where they can survive during the severe winter months. The key findings can be used to establish an integrated pest management strategy based on population genetics for the Korean Ae. albopictus population.
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Affiliation(s)
- Jiyeong Shin
- Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
- The Division of EcoCreative, Ewha Womans University, Seoul 03760, Republic of Korea
| | - Md-Mafizur Rahman
- Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Science, Islamic University, Kushtia 7003, Bangladesh
| | - Juil Kim
- Agriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
- Program of Applied Biology, Division of Bio-resource Sciences, CALS, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Sébastien Marcombe
- Vector Control Consulting—South East Asia (VCC-SEA), Vientian 01000, Laos
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul 03760, Republic of Korea
- Department of Science Education, Ewha Womans University, Seoul 03760, Republic of Korea
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Asad M, Liu D, Chen J, Yang G. Applications of gene drive systems for population suppression of insect pests. BULLETIN OF ENTOMOLOGICAL RESEARCH 2022; 112:724-733. [PMID: 36043456 DOI: 10.1017/s0007485322000268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Population suppression is an effective way for controlling insect pests and disease vectors, which cause significant damage to crop and spread contagious diseases to plants, animals and humans. Gene drive systems provide innovative opportunities for the insect pests population suppression by driving genes that impart fitness costs on populations of pests or disease vectors. Different gene-drive systems have been developed in insects and applied for their population suppression. Here, different categories of gene drives such as meiotic drive (MD), under-dominance (UD), homing endonuclease-based gene drive (HEGD) and especially the CRISPR/Cas9-based gene drive (CCGD) were reviewed, including the history, types, process and mechanisms. Furthermore, the advantages and limitations of applying different gene-drive systems to suppress the insect population were also summarized. This review provides a foundation for developing a specific gene-drive system for insect population suppression.
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Affiliation(s)
- Muhammad Asad
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou 350002, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou 350002, China
| | - Dan Liu
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou 350002, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou 350002, China
| | - Jing Chen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou 350002, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou 350002, China
| | - Guang Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou 350002, China
- Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, Fuzhou 350002, China
- Key Laboratory of Green Pest Control, Fujian Province University, Fuzhou 350002, China
- Ministerial and Provincial Joint Innovation Centre for Safety Production of Cross-Strait Crops, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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8
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Lorenz C, Chiaravalloti-Neto F. Control methods for Aedes aegypti: Have we lost the battle? Travel Med Infect Dis 2022; 49:102428. [PMID: 35985534 DOI: 10.1016/j.tmaid.2022.102428] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022]
Abstract
The past twenty years have been a period of remarkable innovation in Aedes vector control, and several methods with varying success rates have been used. Here we discussed the main intervention categories of vector control applied nowadays and their main weaknesses. It is urgent to have more efficient design and management of control programs, and the requirement for studies to evaluate and compare methods must be prioritised. The world must better articulate actions and cooperate with other sectors beyond health; it is necessary to work together with managers and entomologists in action plans and adapt them to the condition of each region.
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Affiliation(s)
- Camila Lorenz
- Department of Epidemiology, School of Public Health, University of São Paulo, São Paulo, Brazil.
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9
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Wang Y, He X, Qiao L, Yu Z, Chen B, He Z. CRISPR/Cas9 mediates efficient site-specific mutagenesis of the odorant receptor co-receptor (Orco) in the malaria vector Anopheles sinensis. PEST MANAGEMENT SCIENCE 2022; 78:3294-3304. [PMID: 35484862 DOI: 10.1002/ps.6954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/18/2022] [Accepted: 04/28/2022] [Indexed: 06/14/2023]
Abstract
BACKGROUND Anopheles sinensis is the most widely distributed mosquito species and is the main transmitter of Plasmodium vivax malaria in China. Most previous research has focused on the mechanistic understanding of biological processes in An. sinensis and novel ways of interrupting malaria transmission. However, the development of functional genomics and genetics-based vector control strategies against An. sinensis remain limited because of insufficient site-specific genome editing tools. RESULTS We report the first successful application of the CRISPR/Cas9 mediated knock-in for highly efficient, site-specific mutagenesis in An. sinensis. The EGFP marker gene driven by the 3 × P3 promoter was precisely integrated into the odorant receptor co-receptor (Orco) by direct injections of Cas9 protein, double-stranded DNA donor, and Orco-gRNA. We achieved a mutation rate of 3.77%, similar to rates in other mosquito species. Precise knock-in at the intended locus was confirmed by polymerase chain reaction (PCR) amplification and sequencing. The Orco mutation severely impaired mosquito sensitivity to some odors and their ability to locate and discriminate a human host. CONCLUSION Orco was confirmed as a key mediator of multiple olfactory-driven behaviors in the An. sinensis life cycle, highlighting the importance of Orco as a key molecular target for malaria control. The results also demonstrated that CRISPR/Cas9 was a simple and highly efficient genome editing technique for An. sinensis and could be used to develop genetic control tools for this vector. © 2022 Society of Chemical Industry.
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Affiliation(s)
- You Wang
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
| | - Xingfei He
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
| | - Liang Qiao
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
| | - Zhengrong Yu
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
| | - Bin Chen
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
| | - Zhengbo He
- Chongqing Key Laboratory of Vector Insects; Institute of Entomology and Molecular Biology, Chongqing Normal University, Chongqing, China
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10
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Leung S, Windbichler N, Wenger EA, Bever CA, Selvaraj P. Population replacement gene drive characteristics for malaria elimination in a range of seasonal transmission settings: a modelling study. Malar J 2022; 21:226. [PMID: 35883100 PMCID: PMC9327287 DOI: 10.1186/s12936-022-04242-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 07/11/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Gene drives are a genetic engineering method where a suite of genes is inherited at higher than Mendelian rates and has been proposed as a promising new vector control strategy to reinvigorate the fight against malaria in sub-Saharan Africa. METHODS Using an agent-based model of malaria transmission with vector genetics, the impacts of releasing population-replacement gene drive mosquitoes on malaria transmission are examined and the population replacement gene drive system parameters required to achieve local elimination within a spatially-resolved, seasonal Sahelian setting are quantified. The performance of two different gene drive systems-"classic" and "integral"-are evaluated. Various transmission regimes (low, moderate, and high-corresponding to annual entomological inoculation rates of 10, 30, and 80 infectious bites per person) and other simultaneous interventions, including deployment of insecticide-treated nets (ITNs) and passive healthcare-seeking, are also simulated. RESULTS Local elimination probabilities decreased with pre-existing population target site resistance frequency, increased with transmission-blocking effectiveness of the introduced antiparasitic gene and drive efficiency, and were context dependent with respect to fitness costs associated with the introduced gene. Of the four parameters, transmission-blocking effectiveness may be the most important to focus on for improvements to future gene drive strains because a single release of classic gene drive mosquitoes is likely to locally eliminate malaria in low to moderate transmission settings only when transmission-blocking effectiveness is very high (above ~ 80-90%). However, simultaneously deploying ITNs and releasing integral rather than classic gene drive mosquitoes significantly boosts elimination probabilities, such that elimination remains highly likely in low to moderate transmission regimes down to transmission-blocking effectiveness values as low as ~ 50% and in high transmission regimes with transmission-blocking effectiveness values above ~ 80-90%. CONCLUSION A single release of currently achievable population replacement gene drive mosquitoes, in combination with traditional forms of vector control, can likely locally eliminate malaria in low to moderate transmission regimes within the Sahel. In a high transmission regime, higher levels of transmission-blocking effectiveness than are currently available may be required.
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Affiliation(s)
- Shirley Leung
- Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Nikolai Windbichler
- Department of Life Sciences, Imperial College London, South Kensington, London, UK
| | - Edward A Wenger
- Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Caitlin A Bever
- Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Prashanth Selvaraj
- Institute for Disease Modeling, Bill & Melinda Gates Foundation, Seattle, WA, USA.
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11
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Araújo NJS, Macêdo MJF, de Morais LP, da Cunha FAB, de Matos YMLS, de Almeida RS, Braga MFBM, Coutinho HDM. Control of arboviruses vectors using biological control by Wolbachia pipientis: a short review. Arch Microbiol 2022; 204:376. [PMID: 35678877 DOI: 10.1007/s00203-022-02983-x] [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: 06/06/2021] [Revised: 05/09/2022] [Accepted: 05/12/2022] [Indexed: 11/29/2022]
Abstract
The number of arbovirus cases has increased in recent years, demonstrating a need for investing in effective control actions. Among these actions, are strategies using biological control vectors, a field where Wolbachia pipientis has shown itself as useful. Wolbachia pipientis, an obligatory intracellular Gram-negative bacteria, which parasites arthropods naturally or through laboratory-induced infections, is capable of manipulating the reproduction of its host. A systematic literature review gathering studies on this bacteria over last 10 years (2007-2021) was performed given its important role in the reduction of insect disease vectors. 111 articles were found, from which 78 were used in this study. Information on the Wolbachia biology, mechanism of action and potential for the biological control of insect disease vectors was gathered. The present study may contribute to the knowledge surrounding the bacterium, as well as stimulate the production of other studies with the same theme.
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Affiliation(s)
- Nara Juliana Santos Araújo
- Programa de Residência em Saúde Coletiva, Universidade Regional de Cariri-URCA, Regional University of Cariri, Crato, Ceará, 63105-000, Brazil
| | - Márcia Jordana Ferreira Macêdo
- Programa de Residência em Saúde Coletiva, Universidade Regional de Cariri-URCA, Regional University of Cariri, Crato, Ceará, 63105-000, Brazil
| | - Luís Pereira de Morais
- Programa de Residência em Saúde Coletiva, Universidade Regional de Cariri-URCA, Regional University of Cariri, Crato, Ceará, 63105-000, Brazil
| | - Francisco Assis Bezerra da Cunha
- Programa de Residência em Saúde Coletiva, Universidade Regional de Cariri-URCA, Regional University of Cariri, Crato, Ceará, 63105-000, Brazil.,Laboratório de Bioprospecção do Semiárido, Universidade Regional de Cariri-URCA, Crato, Ceará, Brazil
| | | | - Ray Silva de Almeida
- Laboratório de Microbiologia e Biologia Molecular, Universidade Regional de Cariri-URCA, Crato, Ceará, Brazil
| | | | - Henrique Douglas Melo Coutinho
- Programa de Residência em Saúde Coletiva, Universidade Regional de Cariri-URCA, Regional University of Cariri, Crato, Ceará, 63105-000, Brazil. .,Laboratório de Microbiologia e Biologia Molecular, Universidade Regional de Cariri-URCA, Crato, Ceará, Brazil.
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12
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Ranian K, Kashif Zahoor M, Zulhussnain M, Ahmad A. CRISPR/Cas9 mediated sex-ratio distortion by sex specific gene editing in Aedes aegypti. Saudi J Biol Sci 2022; 29:3015-3022. [PMID: 35531165 PMCID: PMC9073027 DOI: 10.1016/j.sjbs.2022.01.034] [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: 11/18/2021] [Revised: 01/05/2022] [Accepted: 01/13/2022] [Indexed: 10/26/2022] Open
Abstract
Aedes aegypti is a principal vector for several viruses including dengue virus, chikungunya virus and zika virus. Economic burden of mosquito-borne diseases, relative failure of traditional control strategies and the resistance development against insecticides enforces towards genetic manipulation of Ae. aegypti. Hence, a key gene doublesex (Aedsx) which regulate sex differentiation and alternatively splices to form male and female specific transcripts (AedsxM and AedsxF ). CRISPR/Cas9 technique was employed to sex specifically disrupt the female-specific isoforms, AedsxF1 and AedsxF2 , both of which were shown to be expressed only in female mosquitoes. Targeting of dsxF at the developmental stage has resulted in various phenotypic anomalies of adult females. The rate of adult mutation phenotype was recorded between 29 and 37% along with anomalies of wing size, proboscis length and reduction in the sizes of pre-blood-meal and after blood-meal ovaries in dsxF1 and dsxF2 microinjected groups, respectively. These findings can be correlated with reduced fecundity rate of Go female, where AedsxF1 and AedsxF2 groups showed reduction rate in range of 23-31%. Furthermore, hatching inhibition rate of 28 to 36% was also observed in G1 generation when compared to the wildtype. Overall, these results demonstrated that AedsxF disruption has resulted in multiple female traits disruption including decreased fertility of the female that could directly or indirectly associated with reproduction and its disease transmitting abilities. All these findings suggesting that CRISPR works to alter the developmental pathways as predicted, and therefore this method potentially gives us the basis for the sex-ratio distortion system as genetic control approach for the management of this vector.
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Affiliation(s)
- Kanwal Ranian
- Department of Zoology, Government College University Faisalabad, Pakistan
| | | | | | - Aftab Ahmad
- Centre of Department of Biochemistry/US-Pakistan Center for Advance Studies in Agriculture and Food Security (USPCAS-AFS), University of Agriculture Faisalabad, Pakistan
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13
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Mitchell C, Leigh S, Alphey L, Haerty W, Chapman T. Reproductive interference and Satyrisation: mechanisms, outcomes and potential use for insect control. JOURNAL OF PEST SCIENCE 2022; 95:1023-1036. [PMID: 35535033 PMCID: PMC9068665 DOI: 10.1007/s10340-022-01476-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 12/23/2021] [Accepted: 01/02/2022] [Indexed: 06/14/2023]
Abstract
Reproductive Interference occurs when interactions between individuals from different species disrupt reproductive processes, resulting in a fitness cost to one or both parties involved. It is typically observed between individuals of closely related species, often upon secondary contact. In both vertebrates and invertebrates, Reproductive Interference is frequently referred to as 'Satyrisation'. It can manifest in various ways, ranging from blocking or reducing the efficacy of mating signals, through to negative effects of heterospecific copulations and the production of sterile or infertile hybrid offspring. The negative fitness effects of Satyrisation in reciprocal matings between species are often asymmetric and it is this aspect, which is most relevant to, and can offer utility in, pest management. In this review, we focus on Satyrisation and outline the mechanisms through which it can operate. We illustrate this by using test cases, and we consider the underlying reasons why the reproductive interactions that comprise Satyrisation occur. We synthesise the key factors affecting the expression of Satyrisation and explore how they have potential utility in developing new routes for the management and control of harmful insects. We consider how Satyrisation might interact with other control mechanisms, and conclude by outlining a framework for its use in control, highlighting some of the important next steps.
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Affiliation(s)
- Christina Mitchell
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ UK
| | - Stewart Leigh
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ UK
| | - Luke Alphey
- The Pirbright Institute, Ash Rd, Pirbright, Woking, GU24 0NF UK
| | - Wilfried Haerty
- Evolutionary Genomics, Earlham Institute, Norwich Research Park, Norwich, NR4 7UG UK
| | - Tracey Chapman
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ UK
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14
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Augustinos AA, Nikolouli K, Duran de la Fuente L, Misbah-ul-Haq M, Carvalho DO, Bourtzis K. Introgression of the Aedes aegypti Red-Eye Genetic Sexing Strains Into Different Genomic Backgrounds for Sterile Insect Technique Applications. Front Bioeng Biotechnol 2022; 10:821428. [PMID: 35186905 PMCID: PMC8847382 DOI: 10.3389/fbioe.2022.821428] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/11/2022] [Indexed: 12/12/2022] Open
Abstract
Aedes aegypti is an invasive mosquito species and major vector of human arboviruses. A wide variety of control methods have been employed to combat mosquito populations. One of them is the sterile insect technique (SIT) that has recently attracted considerable research efforts due to its proven record of success and the absence of harmful environmental footprints. The efficiency and cost-effectiveness of SIT is significantly enhanced by male-only releases. For mosquito SIT, male-only releases are ideally needed since females bite, blood-feed and transmit the pathogens. Ae. aegypti genetic sexing strains (GSS) have recently become available and are based on eye colour mutations that were chosen as selectable markers. These genetic sexing strains were developed through classical genetics and it was shown to be subjected to genetic recombination, a phenomenon that is not suppressed in males as is the case in many Diptera. The genetic stability of these GSS was strengthened by the induction and isolation of radiation-induced inversions. In this study, we used the red eye mutation and the inversion Inv35 line of the Ae. aegypti red-eye GSS s and introgressed them in six different genomic backgrounds to develop GSS with the respective local genomic backgrounds. Our goal was to assess whether the recombination frequencies in the strains with and without the inversion are affected by the different genomic backgrounds. In all cases the recombination events were suppressed in all Inv35 GSS strains, thus indicating that the genomic background does not negatively affect the inversion result. Absence of any effect that could be ascribed to genetic differences, enables the introgression of the key elements of the GSS into the local genomic background prior to release to the target areas. Maintaining the local background increases the chances for successful matings between released males and wild females and addresses potential regulatory concerns regarding biosafety and biosecurity.
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Affiliation(s)
- Antonios A. Augustinos
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
| | - Katerina Nikolouli
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
| | - Lucia Duran de la Fuente
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
| | - Muhammad Misbah-ul-Haq
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
- Nuclear Institute for Food and Agriculture, Peshawar, Pakistan
| | - Danilo O. Carvalho
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
| | - Kostas Bourtzis
- Insect Pest Control Laboratory, Joint FAO/IAEA Centre of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, IAEA Laboratories, Seibersdorf, Austria
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15
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Nignan C, Poda BS, Sawadogo SP, Maïga H, Dabiré KR, Gnankine O, Tripet F, Roux O, Diabaté A. Local adaptation and colonization are potential factors affecting sexual competitiveness and mating choice in Anopheles coluzzii populations. Sci Rep 2022; 12:636. [PMID: 35022496 PMCID: PMC8755725 DOI: 10.1038/s41598-021-04704-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 12/24/2021] [Indexed: 11/16/2022] Open
Abstract
The mating behaviour of the malaria vector Anopheles gambiae complex is an important aspect of its reproduction biology. The success of mosquito release programmes based on genetic control of malaria crucially depends on competitive mating between both laboratory-reared and wild individuals, and populations from different localities. It is known that intrinsic and extrinsic factors can influence the mating success. This study addressed some of the knowledge gaps about factors influcencing mosquito mating success. In semi-field conditions, the study compared the mating success of three laboratory-reared and wild allopatric An. coluzzii populations originating from ecologically different locations in Burkina Faso. Overall, it was found that colonization reduced the mating competitiveness of both males and females compared to that of wild type individuals. More importly, females were more likely to mate with males of their own population of origin, be it wild or colonised, suggesting that local adaptation affected mate choice. The observations of mating behaviour of colonized and local wild populations revealed that subtle differences in behaviour lead to significant levels of population-specific mating. This is the first study to highlight the importance of local adaptation in the mating success, thereby highlighting the importance of using local strains for mass-rearing and release of An. coluzzii in vector control programmes.
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Affiliation(s)
- Charles Nignan
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso.
- Laboratoire d'Entomologie Fondamentale Et Appliquée, Unité de Formation Et de Recherche en Sciences de La Vie Et de La Terre (UFR-SVT), Université Ouaga I Pr. Joseph KI-ZERBO, Ouagadougou, Burkina Faso.
| | - Bèwadéyir Serge Poda
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso
- Laboratoire d'Entomologie Fondamentale Et Appliquée, Unité de Formation Et de Recherche en Sciences de La Vie Et de La Terre (UFR-SVT), Université Ouaga I Pr. Joseph KI-ZERBO, Ouagadougou, Burkina Faso
- MIVEGEC, IRD, CNRS, University of Montpellier, Montpellier, France
| | | | - Hamidou Maïga
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso
| | - Kounbobr Roch Dabiré
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso
| | - Olivier Gnankine
- Laboratoire d'Entomologie Fondamentale Et Appliquée, Unité de Formation Et de Recherche en Sciences de La Vie Et de La Terre (UFR-SVT), Université Ouaga I Pr. Joseph KI-ZERBO, Ouagadougou, Burkina Faso
| | - Frédéric Tripet
- Centre for Applied Entomology and Parasitology, School of Life Sciences, Keele University, Keele, UK
| | - Olivier Roux
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso
- MIVEGEC, IRD, CNRS, University of Montpellier, Montpellier, France
| | - Abdoulaye Diabaté
- Institut de Recherche en Sciences de La Santé (IRSS), Bobo-Dioulasso, Burkina Faso
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16
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Lalyer CR, Sigsgaard L, Giese B. Ecological vulnerability analysis for suppression of Drosophila suzukii by gene drives. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01883] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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17
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Dobson SL. When More is Less: Mosquito Population Suppression Using Sterile, Incompatible and Genetically Modified Male Mosquitoes. JOURNAL OF MEDICAL ENTOMOLOGY 2021; 58:1980-1986. [PMID: 33704487 DOI: 10.1093/jme/tjab025] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Indexed: 06/12/2023]
Abstract
The current review of the Sterile Insect Technique (SIT) is motivated by new technologies and the recent renaissance of male release field trials, which is driving an evolution in mosquito control and regulation. Practitioners that are releasing male mosquitoes would do well to learn from past successes and failures, including political and public engagement complications. With examples that include nuanced integrations of the different technologies, e.g., combinations of Wolbachia and irradiation, it is critical that scientists understand and communicate accurately about the technologies, including their evolving management by different regulatory agencies in the USA. Some male release approaches are considered 'pesticides' and regulated by federal and state agencies, while other male release approaches are unregulated. It is important to consider how the new technologies fit with the more 'traditional' chemical applications of adulticides and larvicides. The economics of male release programs are substantially different from traditional control costs, which can be a challenge to their adoption by abatement districts. However, there is substantial need to overcome these complications and challenges, because the problem with invasive mosquitoes grows ever worse with factors that include insecticide resistance, globalization and climate change.
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Affiliation(s)
- Stephen L Dobson
- Department of Entomology, University of Kentucky, Lexington, KY
- MosquitoMate, Inc., Lexington, KY
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18
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Schairer CE, Najera J, James AA, Akbari OS, Bloss CS. Oxitec and MosquitoMate in the United States: lessons for the future of gene drive mosquito control. Pathog Glob Health 2021; 115:365-376. [PMID: 34313556 PMCID: PMC8592615 DOI: 10.1080/20477724.2021.1919378] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
In response to growing concerns regarding mosquito-borne diseases, scientists are developing novel systems of vector control. Early examples include Oxitec's OX513A genetically-engineered mosquito and MosquitoMate's Wolbachia-infected mosquito, and systems using 'gene-drive' are in development. Systems based on genetic engineering are controversial and institutions around the world are grappling with the question of who should have a say in how such technologies are field-tested and used. Based on media coverage and public records, we created comparative timelines of the efforts of Oxitec and MosquitoMate to navigate federal and local governance and bring their products to market in the United States. We analyze these timelines with particular attention to the role of public input in technology governance. These cases illustrate how governance of technology in the US is diverse, complex, and opaque. Further, the public response to proposed field trials of the Oxitec product highlights inconsistencies between public expectations for governance and actual practice. As gene-drive mosquito control products develop, both federal and local agencies will find their legitimacy tested without a better procedure for transparently integrating public input.
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Affiliation(s)
- Cynthia E. Schairer
- Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - James Najera
- Department of Biology, University of California, San Diego, La Jolla, CA, USA
| | - Anthony A. James
- Departments of Microbiology & Molecular Genetics and Molecular Biology & Biochemistry, University of California, Irvine, CA, USA
| | - Omar S. Akbari
- Division of Biological Sciences, Section of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA, USA
- Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA, USA
| | - Cinnamon S. Bloss
- Department of Psychiatry, School of Medicine, University of California, San Diego, La Jolla, CA, USA
- Department of Family Medicine and Public Health, School of Medicine, University of California, San Diego, La Jolla, CA, USA
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19
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Schember I, Halfon MS. Identification of new Anopheles gambiae transcriptional enhancers using a cross-species prediction approach. INSECT MOLECULAR BIOLOGY 2021; 30:410-419. [PMID: 33866636 PMCID: PMC8266755 DOI: 10.1111/imb.12705] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 02/09/2021] [Accepted: 03/31/2021] [Indexed: 06/12/2023]
Abstract
The success of transgenic mosquito vector control approaches relies on well-targeted gene expression, requiring the identification and characterization of a diverse set of mosquito promoters and transcriptional enhancers. However, few enhancers have been characterized in Anopheles gambiae to date. Here, we employ the SCRMshaw method we previously developed to predict enhancers in the A. gambiae genome, preferentially targeting vector-relevant tissues such as the salivary glands, midgut and nervous system. We demonstrate a high overall success rate, with at least 8 of 11 (73%) tested sequences validating as enhancers in an in vivo xenotransgenic assay. Four tested sequences drive expression in either the salivary gland or the midgut, making them directly useful for probing the biology of these infection-relevant tissues. The success of our study suggests that computational enhancer prediction should serve as an effective means for identifying A. gambiae enhancers with activity in tissues involved in malaria propagation and transmission.
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Affiliation(s)
- Isabella Schember
- Department of Biochemistry, University at Buffalo-State University of New York, Buffalo, NY 14203
| | - Marc S. Halfon
- Department of Biochemistry, University at Buffalo-State University of New York, Buffalo, NY 14203
- Department of Biomedical Informatics, University at Buffalo-State University of New York, Buffalo, NY 14203
- Department of Biological Sciences, University at Buffalo-State University of New York, Buffalo, NY 14203
- NY State Center of Excellence in Bioinformatics & Life Sciences, Buffalo, NY 14203
- Department of Molecular and Cellular Biology and Program in Cancer Genetics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263
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20
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Fiaz M, Martínez LC, Plata-Rueda A, Cossolin JFS, Serra RS, Martins GF, Serrão JE. Behavioral and ultrastructural effects of novaluron on Aedes aegypti larvae. INFECTION GENETICS AND EVOLUTION 2021; 93:104974. [PMID: 34166815 DOI: 10.1016/j.meegid.2021.104974] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 06/15/2021] [Accepted: 06/19/2021] [Indexed: 11/28/2022]
Abstract
Chitin synthesis inhibitors (CSI) are supposed to inhibit formation of chitin microfibrils in newly synthesized cuticle during molting process. Conversely, there has been comparatively few data on morphological effects of CSI on non-target insect organs. In this work, the effects of the CSI novaluron on behavior and midgut of A. aegypti were evaluated. Toxicity bioassays revealed that novaluron is toxic to A. aegypti larva with LC50 = 18.57 mg L-1 when exposed in aqueous solution for 24 h. Novaluron treated larvae were less active and spent more time resting compared to the control group. Histopathology showed that midguts of novaluron-treated larvae had cytoplasm vacuolization and damaged brush border. Cytotoxic effects in midguts of treated larvae induced necrosis, autophagy and damage to mitochondria. Despite being chitin synthesis inhibitor, novaluron did not induce alterations in the integument of A. aegypti larvae. Fluorescence microscopy revealed that the number of digestive cells were higher in novaluron-treated larvae than in control, in response to digestive cell apoptosis. The present study highlights the importance of novaluron against A. aegypti larvae by causing injuries to non-target organs, altering behaviors, inducing cell death and inhibiting cell proliferation.
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Affiliation(s)
- Muhammad Fiaz
- Department of Entomology, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil; Institute of Plant Protection, MNS-University of Agriculture, Multan 60000, Punjab, Pakistan.
| | - Luis Carlos Martínez
- Department of General Biology, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil
| | - Angelica Plata-Rueda
- Department of Entomology, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil
| | | | - Raissa Santana Serra
- Department of Entomology, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil
| | | | - José Eduardo Serrão
- Department of General Biology, Federal University of Viçosa, 36570-000 Viçosa, MG, Brazil.
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21
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A membrane and blood-free approach to rear adult Aedes albopictus. Acta Trop 2021; 218:105895. [PMID: 33753028 DOI: 10.1016/j.actatropica.2021.105895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/12/2021] [Accepted: 03/15/2021] [Indexed: 11/20/2022]
Abstract
Most artificial dietary systems for feeding mosquitoes require a membrane feeder, host cues, phosphate saline buffers and a phagostimulant. These multicomponent feeders are complex, expansive and cumbersome that requires fully trained personnel. The objective of the present is to develop a simple sugar assisted protein (SAP) diet for the egg production of Aedes albopictus. The present study assessed the potential use of SAP dietary system on the engorgement, fecundity, preference of diet components and production of multiple generations of Ae. albopictus. Our data show that the female mosquitoes have strongly preferred a diet with: (i) a combination of sugar and protein over the individual component, and (ii) water over PBS (phosphate buffered saline) buffer as a carrier, whereas adenosine triphosphate (ATP) was not required as a phagostimulant. Based on our optimization data, the SAP diets (10-20% bovine serum albumin in 5% sucrose aqueous solution) do not require chemo-attractive lure, phagostimulant ATP, temperature and membrane feeding components. Female mosquitoes readily engorge on SAP diets and show similar rates of survival and fecundity compared to those when blood-fed on live animals. In addition, the number of eggs produced by female mosquitoes fed on SAP diets kept consistent for 10 consecutive generations. Our results indicate that SAP diet is a potential alternative against blood feeding that is simple and cost-effective diets for Ae. albopictus colony maintenance and to support large scale mass- production for experimental and other purposes.
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The First Report for the Presence of Spiroplasma and Rickettsia in Red Palm Weevil Rhynchophorus ferrugineus (Coleoptera: Curculionidae) in Egypt. Acta Parasitol 2021; 66:593-604. [PMID: 33389546 DOI: 10.1007/s11686-020-00310-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Accepted: 11/07/2020] [Indexed: 10/22/2022]
Abstract
PURPOSE The study of the Red Palm Weevil (RPW), Rhynchophorus ferrugineus (Olivier), as an invasive pest of palm trees. METHODS In this study, 36 RPW individuals were collected from 6 different locations in Egypt. The presences of endosymbionts in the RPW individuals were assayed. The phylogenetic analysis of the RPW inhabiting Egypt was conducted using Cytochrome c oxidase sub-unit 1 (CO1) gene. RESULTS Spiroplasma was found, for the first time, in all individuals, while Rickettsia was found, for the first time, in individuals collected from only 3 of the 6 locations. Endosymbionts harbouring Egyptian RPW were closely related to those harbouring Diptera and\or Trombidiformes associated with palm trees. This may be due to horizontal transmission through palm sap or through ectoparasites living on the RPW. Finally, the phylogenetic analysis of the RPW inhabiting Egypt was conducted. The collected individuals were closely related to Saudi Arabia specimens collected from the eastern region. Thus, Saudi Arabia may be the origin of the RPW which invaded Egypt. Individuals from populations inhabiting the same geographical locations were closely related. This may be due to secondary invasion incidents that may have taken place through transportation of infested date palm trees and offshoots from infected to uninfected locations. CONCLUSION This study reports the first incidence for the presence and coexistence of Spiroplasma and Rickettsia in RPW collected from Egypt. In addition, it was found that the collected individuals of RPW were closely related to a Saudi haplotype. Thus, Saudi Arabia may be the origin of infection which invaded Egypt.
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Vollans M, Bonsall MB. The concomitant effects of self-limiting insect releases and behavioural interference on patterns of coexistence and exclusion of competing mosquitoes. Proc Biol Sci 2021; 288:20210714. [PMID: 34004130 PMCID: PMC8131123 DOI: 10.1098/rspb.2021.0714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 04/22/2021] [Indexed: 11/26/2022] Open
Abstract
Aedes aegypti is the dominant vector of dengue, a potentially fatal virus whose incidence has increased eightfold in the last two decades. As dengue has no widely available vaccine, vector control is key to reducing the global public health burden. A promising method is the release of self-limiting Ae. aegypti, which mate with wild Ae. aegypti and produce non-viable offspring. The resultant decrease in Ae. aegypti population size may impact coexistence with Ae. albopictus, another vector of dengue. A behavioural mechanism influencing coexistence between these species is reproductive interference, where incomplete species recognition results in heterospecifics engaging in mating activities. We develop a theoretical framework to investigate the interaction between self-limiting Ae. aegypti releases and reproductive interference between Ae. aegypti and Ae. albopictus on patterns of coexistence. In the absence of self-limiting Ae. aegypti release, coexistence can occur when the strength of reproductive interference experienced by both species is low. Results show that substantial overflooding with self-limiting Ae. aegypti prevents coexistence. For lower release ratios, as the release ratio increases, coexistence can occur when the strength of reproductive interference is increasingly high for Ae. albopictus and increasingly low for Ae. aegypti. This emphasizes the importance of including behavioural ecological processes into population models to evaluate the efficacy of vector control.
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Affiliation(s)
- Maisie Vollans
- Mathematical Ecology Research Group, Department of Zoology, University of Oxford, Oxford OX1 3PS, UK
| | - Michael B. Bonsall
- Mathematical Ecology Research Group, Department of Zoology, University of Oxford, Oxford OX1 3PS, UK
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Champer J, Champer SE, Kim IK, Clark AG, Messer PW. Design and analysis of CRISPR-based underdominance toxin-antidote gene drives. Evol Appl 2021; 14:1052-1069. [PMID: 33897820 PMCID: PMC8061266 DOI: 10.1111/eva.13180] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 12/24/2022] Open
Abstract
CRISPR gene drive systems offer a mechanism for transmitting a desirable transgene throughout a population for purposes ranging from vector-borne disease control to invasive species suppression. In this simulation study, we assess the performance of several CRISPR-based underdominance gene drive constructs employing toxin-antidote (TA) principles. These drives disrupt the wild-type version of an essential gene using a CRISPR nuclease (the toxin) while simultaneously carrying a recoded version of the gene (the antidote). Drives of this nature allow for releases that could be potentially confined to a desired geographic location. This is because such drives have a nonzero-invasion threshold frequency required for the drive to spread through the population. We model drives which target essential genes that are either haplosufficient or haplolethal, using nuclease promoters with expression restricted to the germline, promoters that additionally result in cleavage activity in the early embryo from maternal deposition, and promoters that have ubiquitous somatic expression. We also study several possible drive architectures, considering both "same-site" and "distant-site" systems, as well as several reciprocally targeting drives. Together, these drive variants provide a wide range of invasion threshold frequencies and options for both population modification and suppression. Our results suggest that CRISPR TA underdominance drive systems could allow for the design of flexible and potentially confinable gene drive strategies.
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Affiliation(s)
- Jackson Champer
- Department of Computational BiologyCornell UniversityIthacaNew YorkUSA
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNew YorkUSA
| | - Samuel E. Champer
- Department of Computational BiologyCornell UniversityIthacaNew YorkUSA
| | - Isabel K. Kim
- Department of Computational BiologyCornell UniversityIthacaNew YorkUSA
| | - Andrew G. Clark
- Department of Computational BiologyCornell UniversityIthacaNew YorkUSA
- Department of Molecular Biology and GeneticsCornell UniversityIthacaNew YorkUSA
| | - Philipp W. Messer
- Department of Computational BiologyCornell UniversityIthacaNew YorkUSA
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Polanco C, Uversky VN, Huberman A, Andrés L, Buhse T, Castañón-González JA, Sánchez-Guerrero AF. Bioinformatics-based Identification of Proteins Expressed by Arthropod- borne Viruses Transmitted by Aedes Aegypti Mosquito. CURR PROTEOMICS 2021. [DOI: 10.2174/1570164617999200422123618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The female Aedes aegypti mosquito is a vector of several arthropod-borne
viruses, such as Mayaro, Dengue, Chikungunya, Yellow Fever, and Zika. These viruses cause the
death of at least 600000 people a year and temporarily disable several million more around the
world. Up to date, there are no effective prophylactic measures that would prevent the contact and
bite of this arthropod and, therefore, its consequential contagion.
Objective:
The objective of the present study was to search for the regularities of the proteins expressed
by these five viruses, at residues level, and obtain a “bioinformatic fingerprint” to select
them.
Methods:
We used two bioinformatic systems, our in-house bioinformatic system named Polarity
Index Method® (PIM®) supported at residues level, and the commonly used algorithm for the prediction
of intrinsic disorder predisposition, PONDR® FIT. We applied both programs to the 29 proteins
that express the five groups of arboviruses studied, and we calculated for each of them their
Polarity Index Method® profile and their intrinsic disorder predisposition. This information was
then compared with analogous information for other protein groups, such as proteins from bacteria,
fungi, viruses, and cell-penetrating peptides from the UniProt database, and a set of intrinsically disordered
proteins. Once the “fingerprint” of each group of arboviruses was obtained, these “fingerprints”
were searched among the 559228 “reviewed” proteins from the UniProt database.
Results:
In total, 1736 proteins were identified from the 559228 “reviewed” proteins from the
UniProt database, with similar “PIM® profile” to the 29 mutated proteins that express the five
groups of arboviruses.
Conclusion:
We propose that the “PIM® profile” of characterization of proteins might be useful for
the identification of proteins expressed by arthropod-borne viruses transmitted by Aedes aegypti
mosquito.
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Affiliation(s)
- Carlos Polanco
- Department of Mathematics, Faculty of Sciences, Universidad Nacional Autonoma de Mexico, Mexico City 04510, Mexico
| | - Vladimir N. Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL33647, United States
| | - Alberto Huberman
- Department of Biochemistry, Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran, 14080 Mexico City, Mexico
| | - Leire Andrés
- Department of Pathology, Hospital de Cruces, 48903, Barakaldo, Spain
| | - Thomas Buhse
- Centro de Investigaciones Quimicas, Universidad Autonoma del Estado de Morelos, Cuernavaca Morelos 62209, Mexico
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Shin J, Jung J. Complete mitochondrial genome of Aedes flavopictus (Yamada, 1921) (Diptera: Culicidae) collected in South Korea. MITOCHONDRIAL DNA PART B-RESOURCES 2021; 6:265-267. [PMID: 33553640 PMCID: PMC7850365 DOI: 10.1080/23802359.2020.1863164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we determined for the first time the mitochondrial genome sequence of an Aedes flavopictus specimen collected in South Korea. Its mitochondrial genome was 16,060 bp in length, consisting of 13 protein-coding, 22 tRNA, and 2 rRNA genes and a non-coding A + T rich region. The overall base composition in the heavy strand was 39.7, 8.6, 12.7, and 39% of A, G, C, and T, respectively, and the G + C content was 21.2%. Phylogenetic analysis revealed that Aedes spp. formed a monophyletic clade.
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Affiliation(s)
- Jiyeong Shin
- The Division of EcoCreative, Ewha Womans University, Seoul, Republic of Korea
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul, Republic of Korea.,Department of Science Education, Ewha Womans University, Seoul, Republic of Korea
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Ogunlade ST, Meehan MT, Adekunle AI, Rojas DP, Adegboye OA, McBryde ES. A Review: Aedes-Borne Arboviral Infections, Controls and Wolbachia-Based Strategies. Vaccines (Basel) 2021; 9:32. [PMID: 33435566 PMCID: PMC7827552 DOI: 10.3390/vaccines9010032] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/28/2020] [Accepted: 01/05/2021] [Indexed: 12/31/2022] Open
Abstract
Arthropod-borne viruses (Arboviruses) continue to generate significant health and economic burdens for people living in endemic regions. Of these viruses, some of the most important (e.g., dengue, Zika, chikungunya, and yellow fever virus), are transmitted mainly by Aedes mosquitoes. Over the years, viral infection control has targeted vector population reduction and inhibition of arboviral replication and transmission. This control includes the vector control methods which are classified into chemical, environmental, and biological methods. Some of these control methods may be largely experimental (both field and laboratory investigations) or widely practised. Perceptively, one of the biological methods of vector control, in particular, Wolbachia-based control, shows a promising control strategy for eradicating Aedes-borne arboviruses. This can either be through the artificial introduction of Wolbachia, a naturally present bacterium that impedes viral growth in mosquitoes into heterologous Aedes aegypti mosquito vectors (vectors that are not natural hosts of Wolbachia) thereby limiting arboviral transmission or via Aedes albopictus mosquitoes, which naturally harbour Wolbachia infection. These strategies are potentially undermined by the tendency of mosquitoes to lose Wolbachia infection in unfavourable weather conditions (e.g., high temperature) and the inhibitory competitive dynamics among co-circulating Wolbachia strains. The main objective of this review was to critically appraise published articles on vector control strategies and specifically highlight the use of Wolbachia-based control to suppress vector population growth or disrupt viral transmission. We retrieved studies on the control strategies for arboviral transmissions via arthropod vectors and discussed the use of Wolbachia control strategies for eradicating arboviral diseases to identify literature gaps that will be instrumental in developing models to estimate the impact of these control strategies and, in essence, the use of different Wolbachia strains and features.
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Affiliation(s)
- Samson T. Ogunlade
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia; (M.T.M.); (A.I.A.); (O.A.A.); (E.S.M.)
- College of Medicine and Dentistry, James Cook University, Townsville, QLD 4811, Australia
| | - Michael T. Meehan
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia; (M.T.M.); (A.I.A.); (O.A.A.); (E.S.M.)
| | - Adeshina I. Adekunle
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia; (M.T.M.); (A.I.A.); (O.A.A.); (E.S.M.)
| | - Diana P. Rojas
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD 4811, Australia;
| | - Oyelola A. Adegboye
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia; (M.T.M.); (A.I.A.); (O.A.A.); (E.S.M.)
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, QLD 4811, Australia;
| | - Emma S. McBryde
- Australian Institute of Tropical Health and Medicine, James Cook University, Townsville, QLD 4811, Australia; (M.T.M.); (A.I.A.); (O.A.A.); (E.S.M.)
- College of Medicine and Dentistry, James Cook University, Townsville, QLD 4811, Australia
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Shults P, Cohnstaedt LW, Adelman ZN, Brelsfoard C. Next-generation tools to control biting midge populations and reduce pathogen transmission. Parasit Vectors 2021; 14:31. [PMID: 33413518 PMCID: PMC7788963 DOI: 10.1186/s13071-020-04524-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 12/05/2020] [Indexed: 02/06/2023] Open
Abstract
Biting midges of the genus Culicoides transmit disease-causing agents resulting in a significant economic impact on livestock industries in many parts of the world. Localized control efforts, such as removal of larval habitat or pesticide application, can be logistically difficult, expensive and ineffective if not instituted and maintained properly. With these limitations, a population-level approach to the management of Culicoides midges should be investigated as a means to replace or supplement existing control strategies. Next-generation control methods such as Wolbachia- and genetic-based population suppression and replacement are being investigated in several vector species. Here we assess the feasibility and applicability of these approaches for use against biting midges. We also discuss the technical and logistical hurdles needing to be addressed for each method to be successful, as well as emphasize the importance of addressing community engagement and involving stakeholders in the investigation and development of these approaches.
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Affiliation(s)
- Phillip Shults
- Texas A&M University, 370 Olsen Blvd, College Station, TX, 77843, USA.
| | - Lee W Cohnstaedt
- USDA-ARS Arthropod Borne Animal Disease Research Unit, 1515 College Ave, Manhattan, KS, 66502, USA
| | - Zach N Adelman
- Texas A&M University, 370 Olsen Blvd, College Station, TX, 77843, USA
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A patent review on strategies for biological control of mosquito vector. World J Microbiol Biotechnol 2020; 36:187. [DOI: 10.1007/s11274-020-02960-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/07/2020] [Indexed: 12/31/2022]
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Gouagna LC, Damiens D, Oliva CF, Boyer S, Le Goff G, Brengues C, Dehecq JS, Raude J, Simard F, Fontenille D. Strategic Approach, Advances, and Challenges in the Development and Application of the SIT for Area-Wide Control of Aedes albopictus Mosquitoes in Reunion Island. INSECTS 2020; 11:insects11110770. [PMID: 33171885 PMCID: PMC7695178 DOI: 10.3390/insects11110770] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/27/2020] [Accepted: 11/05/2020] [Indexed: 12/20/2022]
Abstract
Simple Summary Aedes albopictus is a well-established competent arbovirus vector in Reunion Island, a French overseas territory in the Indian Ocean, occurring in a range of natural to urban environments where it represents a major threat to public health. Following the 2006 Chikungunya outbreak and periodic occurrence of dengue epidemics, the sterile insect technique (SIT) emerged as the most environment-friendly option for integration with the current vector control strategy that relies mainly on the elimination of breeding sites and insecticide applications. This paper describes the trajectory that has been followed in assessing the feasibility of SIT against Ae. albopictus in Reunion Island, and reviews some of the main achievements since 2009. These include essential scientific information so far obtained on the biology and ecology of Ae. albopictus, and the development of the requisite technological capabilities for the production and release of sexually competitive sterile males. Furthermore, it also draws attention to the strategies established to streamline the decision-making process, including an awareness campaign to enhance public understanding, efforts to secure public acceptance and regulatory validation of SIT pilot testing for small-scale suppression of wild Ae. albopictus in selected urban sites on the island. Abstract The global expansion of Aedes albopictus, together with the absence of specific treatment and vaccines for most of the arboviruses it transmits, has stimulated the development of more sustainable and ecologically acceptable methods for control of disease transmission through the suppression of natural vector populations. The sterile insect technique (SIT) is rapidly evolving as an additional tool for mosquito control, offering an efficient and more environment-friendly alternative to the use of insecticides. Following the devastating chikungunya outbreak, which affected 38% of the population on Reunion Island (a French overseas territory in the southwest of the Indian Ocean), there has been strong interest and political will to develop effective alternatives to the existing vector control strategies. Over the past 10 years, the French Research and Development Institute (IRD) has established an SIT feasibility program against Ae. albopictus on Reunion Island in collaboration with national and international partners. This program aimed to determine whether the SIT based on the release of radiation-sterilized males is scientifically and technically feasible, and socially acceptable as part of a control strategy targeting the local Ae. albopictus population. This paper provides a review of a multi-year and a particularly broad scoping process of establishing the scientific and technological feasibility of the SIT against Ae. albopictus on Reunion Island. It also draws attention to some prerequisites of the decision-making process, through awareness campaigns to enhance public understanding and support, social adoption, and regulatory validation of the SIT pilot tests.
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Affiliation(s)
- Louis Clément Gouagna
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
- Correspondence: ; Tel.: +33-2-62-93-88-19
| | - David Damiens
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Clélia F. Oliva
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Sébastien Boyer
- Medical and Veterinary Entomology Unit, Institut Pasteur du Cambodge, Phnom Penh 12201, Cambodia;
| | - Gilbert Le Goff
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Cécile Brengues
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Jean-Sébastien Dehecq
- ARS—Délégation Départementale de la Haute-Garonne, Pôle de Prévention et Gestion des Alertes Sanitaires, CEDEX 2, 31050 Toulouse, France;
| | - Jocelyn Raude
- EHESP, School of Public Health, UMR “Emergence des Pathologies Virales”, Université Aix-Marseille, IRD190, INSERM1207, 35043 Rennes, France;
| | - Frédéric Simard
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
| | - Didier Fontenille
- MIVEGEC, IRD, CNRS, Université Montpellier, CEDEX 5, 34394 Montpellier, France; (D.D.); (C.F.O.); (G.L.G.); (C.B.); (F.S.); (D.F.)
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Schairer CE, Triplett C, Buchman A, Akbari OS, Bloss CS. Interdisciplinary development of a standardized introduction to gene drives for lay audiences. BMC Med Res Methodol 2020; 20:273. [PMID: 33153449 PMCID: PMC7643426 DOI: 10.1186/s12874-020-01146-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 10/12/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND While there is wide consensus that the public should be consulted about emerging technology early in development, it is difficult to elicit public opinion about innovations unfamiliar to lay audiences. We sought public input on a program of research on genetic engineering to control mosquito vectors of disease that is led by scientists at the University of California and funded by the U.S. Defense Advanced Research Projects Agency (DARPA). In preparation for this effort, we developed a series of narrated slideshows to prompt responses to the development of gene drive mosquito control strategies among lay people. We describe the development and content of these slideshows and evaluate their ability to elicit discussions among focus group participants. METHODS In developing these materials, we used an iterative process involving input from experts in molecular genetics and vector control. Topics were chosen for their relevance to the goals of the scientists leading the program of research. Significant time was devoted to crafting explanations that would be accessible to uninitiated members of the public but still represent the science accurately. Through qualitative analysis of focus group discussions prompted by the slideshows, we evaluated the success of these slideshows in imparting clear technical information sufficient to inform lay discussion. RESULTS The collaboration resulted in a series of four narrated slideshows that were used to anchor discussions in online focus groups. Many participants described the slideshows as interesting and informative, while also raising concerns and possible risks that were not directly addressed in the material presented. Open-ended comments from participants suggest that the slideshows inspired critical questions, reflection, and conversation about genetically engineered and gene drive mosquitoes. After the final and most technically complex slideshow, however, some respondents made comments suggestive of overwhelm or confusion. CONCLUSION Our narrated slideshows prompted engaged conversations about genetically engineered mosquitoes among members of the public who were generally naïve to this technology. Narrated slideshows may serve as viable and useful tools for future public engagement on other controversial emerging medical and public health technologies.
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Affiliation(s)
- Cynthia E Schairer
- Department of Psychiatry, University of California, San Diego, 9500 Gilman Drive, MC 0811, La Jolla, California, 92093-0811, USA
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA, USA
| | - Cynthia Triplett
- Center for Wireless and Population Health Systems, The Qualcomm Institute of Calit2, University of California, San Diego, La Jolla, CA, USA
| | - Anna Buchman
- Section of Cell and Developmental Biology, Division of Biology, University of California, San Diego, La Jolla, CA, USA
| | - Omar S Akbari
- Section of Cell and Developmental Biology, Division of Biology, University of California, San Diego, La Jolla, CA, USA
- Tata Institute for Genetics and Society, University of California, San Diego, La Jolla, CA, USA
| | - Cinnamon S Bloss
- Department of Psychiatry, University of California, San Diego, 9500 Gilman Drive, MC 0811, La Jolla, California, 92093-0811, USA.
- Department of Family Medicine and Public Health, University of California, San Diego, La Jolla, CA, USA.
- Center for Wireless and Population Health Systems, The Qualcomm Institute of Calit2, University of California, San Diego, La Jolla, CA, USA.
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Laureti M, Paradkar PN, Fazakerley JK, Rodriguez-Andres J. Superinfection Exclusion in Mosquitoes and Its Potential as an Arbovirus Control Strategy. Viruses 2020; 12:v12111259. [PMID: 33167513 PMCID: PMC7694488 DOI: 10.3390/v12111259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/19/2022] Open
Abstract
The continuing emergence of arbovirus disease outbreaks around the world, despite the use of vector control strategies, warrants the development of new strategies to reduce arbovirus transmission. Superinfection exclusion, a phenomenon whereby a primary virus infection prevents the replication of a second closely related virus, has potential to control arbovirus disease emergence and outbreaks. This phenomenon has been observed for many years in plants, insects and mammalian cells. In this review, we discuss the significance of identifying novel vector control strategies, summarize studies exploring arbovirus superinfection exclusion and consider the potential for this phenomenon to be the basis for novel arbovirus control strategies.
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Affiliation(s)
- Mathilde Laureti
- Peter Doherty Institute for Infection and Immunity and Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC 3000 Melbourne, Australia;
- CSIRO Health & Biosecurity, Australian Centre for Diseases Preparedness, VIC 3220 Geelong, Australia;
- Correspondence: (M.L.); (J.R.-A.)
| | - Prasad N. Paradkar
- CSIRO Health & Biosecurity, Australian Centre for Diseases Preparedness, VIC 3220 Geelong, Australia;
| | - John K. Fazakerley
- Peter Doherty Institute for Infection and Immunity and Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC 3000 Melbourne, Australia;
| | - Julio Rodriguez-Andres
- Peter Doherty Institute for Infection and Immunity and Faculty of Veterinary and Agricultural Sciences, University of Melbourne, VIC 3000 Melbourne, Australia;
- Correspondence: (M.L.); (J.R.-A.)
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Naegeli H, Bresson J, Dalmay T, Dewhurst IC, Epstein MM, Guerche P, Hejatko J, Moreno FJ, Mullins E, Nogué F, Rostoks N, Sánchez Serrano JJ, Savoini G, Veromann E, Veronesi F, Bonsall MB, Mumford J, Wimmer EA, Devos Y, Paraskevopoulos K, Firbank LG. Adequacy and sufficiency evaluation of existing EFSA guidelines for the molecular characterisation, environmental risk assessment and post-market environmental monitoring of genetically modified insects containing engineered gene drives. EFSA J 2020; 18:e06297. [PMID: 33209154 PMCID: PMC7658669 DOI: 10.2903/j.efsa.2020.6297] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Advances in molecular and synthetic biology are enabling the engineering of gene drives in insects for disease vector/pest control. Engineered gene drives (that bias their own inheritance) can be designed either to suppress interbreeding target populations or modify them with a new genotype. Depending on the engineered gene drive system, theoretically, a genetic modification of interest could spread through target populations and persist indefinitely, or be restricted in its spread or persistence. While research on engineered gene drives and their applications in insects is advancing at a fast pace, it will take several years for technological developments to move to practical applications for deliberate release into the environment. Some gene drive modified insects (GDMIs) have been tested experimentally in the laboratory, but none has been assessed in small-scale confined field trials or in open release trials as yet. There is concern that the deliberate release of GDMIs in the environment may have possible irreversible and unintended consequences. As a proactive measure, the European Food Safety Authority (EFSA) has been requested by the European Commission to review whether its previously published guidelines for the risk assessment of genetically modified animals (EFSA, 2012 and 2013), including insects (GMIs), are adequate and sufficient for GDMIs, primarily disease vectors, agricultural pests and invasive species, for deliberate release into the environment. Under this mandate, EFSA was not requested to develop risk assessment guidelines for GDMIs. In this Scientific Opinion, the Panel on Genetically Modified Organisms (GMO) concludes that EFSA's guidelines are adequate, but insufficient for the molecular characterisation (MC), environmental risk assessment (ERA) and post-market environmental monitoring (PMEM) of GDMIs. While the MC,ERA and PMEM of GDMIs can build on the existing risk assessment framework for GMIs that do not contain engineered gene drives, there are specific areas where further guidance is needed for GDMIs.
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Then C, Kawall K, Valenzuela N. Spatiotemporal Controllability and Environmental Risk Assessment of Genetically Engineered Gene Drive Organisms from the Perspective of European Union Genetically Modified Organism Regulation. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2020; 16:555-568. [PMID: 32250054 PMCID: PMC7496464 DOI: 10.1002/ieam.4278] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Revised: 12/16/2019] [Accepted: 03/30/2020] [Indexed: 05/12/2023]
Abstract
Gene drive organisms are a recent development created by using methods of genetic engineering; they inherit genetic constructs that are passed on to future generations with a higher probability than with Mendelian inheritance. There are some specific challenges inherent to the environmental risk assessment (ERA) of genetically engineered (GE) gene drive organisms because subsequent generations of these GE organisms might show effects that were not observed or intended in the former generations. Unintended effects can emerge from interaction of the gene drive construct with the heterogeneous genetic background of natural populations and/or be triggered by changing environmental conditions. This is especially relevant in the case of gene drives with invasive characteristics and typically takes dozens of generations to render the desired effect. Under these circumstances, "next generation effects" can substantially increase the spatial and temporal complexity associated with a high level of uncertainty in ERA. To deal with these problems, we suggest the introduction of a new additional step in the ERA of GE gene drive organisms that takes 3 criteria into account: the biology of the target organisms, their naturally occurring interactions with the environment (biotic and abiotic), and their intended biological characteristics introduced by genetic engineering. These 3 criteria are merged to form an additional step in ERA, combining specific "knowns" and integrating areas of "known unknowns" and uncertainties, with the aim of assessing the spatiotemporal controllability of GE gene drive organisms. The establishment of assessing spatiotemporal controllability can be used to define so-called "cut-off criteria" in the risk analysis of GE gene drive organisms: If it is likely that GE gene drive organisms escape spatiotemporal controllability, the risk assessment cannot be sufficiently reliable because it is not conclusive. Under such circumstances, the environmental release of the GE gene drive organisms would not be compatible with the precautionary principle (PP). Integr Environ Assess Manag 2020;16:555-568. © 2020 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals, Inc. on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
- Christoph Then
- Testbiotech e.V., Institute for Independent Impact Assessment of BiotechnologyMunichGermany
| | | | - Nina Valenzuela
- Testbiotech e.V., Institute for Independent Impact Assessment of BiotechnologyMunichGermany
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Hustedt J, Doum D, Keo V, Ly S, Sam B, Chan V, Boyer S, Liverani M, Alexander N, Bradley J, Prasetyo DB, Rachmat A, Lopes S, Leang R, Hii J. Ability of the Premise Condition Index to Identify Premises with Adult and Immature Aedes Mosquitoes in Kampong Cham, Cambodia. Am J Trop Med Hyg 2020; 102:1432-1439. [PMID: 32274992 PMCID: PMC7253129 DOI: 10.4269/ajtmh.19-0453] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aedes-transmitted diseases, especially dengue, are increasing throughout the world and the main preventive methods include vector control and the avoidance of mosquito bites. A simple Premise Condition Index (PCI) categorizing shade, house, and yard conditions was previously developed to help prioritize households or geographical areas where resources are limited. However, evidence about the accuracy of the PCI is mixed. The current study aimed to contribute to a better understanding of the relevance by collecting data from 2,400 premises at four time points over 1 year in Kampong Cham, Cambodia. Regression models were then used to identify associations between PCI and Aedes adult female mosquitoes and pupae. In addition, receiver operating characteristic curves were used to measure the ability of PCI to identify premises in the top quartile of mosquito abundance. The density of adult Aedes females was positively associated with PCI at the household (ratio of means = 1.16 per point on the PCI scale) and cluster level (ratio of means = 1.54). However, the number of Aedes pupae was negatively associated with PCI at the household level (rate ratio = 0.74) and did not have a statistically significant association at the cluster level. Receiver operating characteristic curves suggest the PCI score had “rather low accuracy” (area under the ROC curve = 0.52 and 0.54) at identifying top-quartile premises in terms of adult female Aedes and pupae, respectively. These results suggest that caution is warranted in the programmatic use of PCI in areas of similar geography and mosquito abundance.
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Affiliation(s)
- John Hustedt
- London School of Hygiene and Tropical Medicine, London, United Kingdom.,Malaria Consortium, Phnom Penh Center, Phnom Penh, Cambodia
| | - Dyna Doum
- Malaria Consortium, Phnom Penh Center, Phnom Penh, Cambodia
| | - Vanney Keo
- Malaria Consortium, Phnom Penh Center, Phnom Penh, Cambodia
| | - Sokha Ly
- Cambodian National Dengue Control Program, Phnom Penh, Cambodia
| | - BunLeng Sam
- Cambodian National Dengue Control Program, Phnom Penh, Cambodia
| | - Vibol Chan
- World Health Organization, Phnom Penh, Cambodia
| | | | - Marco Liverani
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Neal Alexander
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - John Bradley
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | | | - Agus Rachmat
- US Naval Medical Research Unit-2, Phnom Penh, Cambodia
| | - Sergio Lopes
- Malaria Consortium, Phnom Penh Center, Phnom Penh, Cambodia
| | - Rithea Leang
- Cambodian National Dengue Control Program, Phnom Penh, Cambodia
| | - Jeffrey Hii
- Malaria Consortium, Phnom Penh Center, Phnom Penh, Cambodia
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36
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Duarte JL, Maciel de Faria Motta Oliveira AE, Pinto MC, Chorilli M. Botanical insecticide-based nanosystems for the control of Aedes (Stegomyia) aegypti larvae. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:28737-28748. [PMID: 32458306 DOI: 10.1007/s11356-020-09278-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/12/2020] [Indexed: 06/11/2023]
Abstract
Aedes (Stegomyia) aegypti is a cosmopolitan species that transmits arbovirus of medical importance as dengue, Zika, and chikungunya. The main strategy employed for the control of this mosquito is the use of larvicidal agents. However, the overuse of synthetic chemical larvicides has led to an increase in resistant insects, making management difficult. Therefore, the use of botanical insecticide-based nanosystems as an alternative to the use of synthetic agents for the control of Ae. aegypti has gained more considerable attention in the last years, mainly due to the advantages of nanostructured delivery systems, such as (a) controlled release; (b) greater surface area; (c) improvement of biological activity; (d) protection of natural bioactive agents from the environment and thus achieving stability; and (e) lipophilic drugs are easier dispersed even in aqueous vehicles. This review summarizes the current knowledge about botanical insecticide-based nanosystems as larvicidal against Ae. aegypti larvae. The majority of papers used metallic nanoparticles (NPs) as larvicidal agents, mainly silver nanoparticles (AgNPs), showing potential for their use as an alternative, followed by nanoemulsions containing vegetable oils, most essential oils, nanosystems that allow the dispersion of this high hydrophobic product in water, the environment of larval development. The final section describes scientific findings about the mode of action of these NPs, showing the gap about this subject in literature.
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Affiliation(s)
- Jonatas Lobato Duarte
- School of Pharmaceutical Sciences, São Paulo State University-UNESP, Rodovia Araraquara Jaú, Km 01, s/n, Campos Ville, Araraquara, SP, 14800-903, Brazil
| | - Anna Eliza Maciel de Faria Motta Oliveira
- Department of Health and biological sciences, Federal University of Amapá-UNIFAP, Rodovia Juscelino Kubitschek, Km 02, Jardim Marco Zero, Macapá, AP, 68903-361, Brazil
| | - Mara Cristina Pinto
- School of Pharmaceutical Sciences, São Paulo State University-UNESP, Rodovia Araraquara Jaú, Km 01, s/n, Campos Ville, Araraquara, SP, 14800-903, Brazil
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University-UNESP, Rodovia Araraquara Jaú, Km 01, s/n, Campos Ville, Araraquara, SP, 14800-903, Brazil.
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Silvério MRS, Espindola LS, Lopes NP, Vieira PC. Plant Natural Products for the Control of Aedes aegypti: The Main Vector of Important Arboviruses. Molecules 2020; 25:E3484. [PMID: 32751878 PMCID: PMC7435582 DOI: 10.3390/molecules25153484] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 07/24/2020] [Accepted: 07/28/2020] [Indexed: 01/20/2023] Open
Abstract
The mosquito species Aedes aegypti is one of the main vectors of arboviruses, including dengue, Zika and chikungunya. Considering the deficiency or absence of vaccines to prevent these diseases, vector control remains an important strategy. The use of plant natural product-based insecticides constitutes an alternative to chemical insecticides as they are degraded more easily and are less harmful to the environment, not to mention their lower toxicity to non-target insects. This review details plant species and their secondary metabolites that have demonstrated insecticidal properties (ovicidal, larvicidal, pupicidal, adulticidal, repellent and ovipositional effects) against the mosquito, together with their mechanisms of action. In particular, essential oils and some of their chemical constituents such as terpenoids and phenylpropanoids offer distinct advantages. Thiophenes, amides and alkaloids also possess high larvicidal and adulticidal activities, adding to the wealth of plant natural products with potential in vector control applications.
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Affiliation(s)
- Maíra Rosato Silveiral Silvério
- NPPNS, Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-903, São Paulo, Brazil
| | | | - Norberto Peporine Lopes
- NPPNS, Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-903, São Paulo, Brazil
| | - Paulo Cézar Vieira
- NPPNS, Departamento de Ciências BioMoleculares, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14040-903, São Paulo, Brazil
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Brady OJ, Kharisma DD, Wilastonegoro NN, O'Reilly KM, Hendrickx E, Bastos LS, Yakob L, Shepard DS. The cost-effectiveness of controlling dengue in Indonesia using wMel Wolbachia released at scale: a modelling study. BMC Med 2020; 18:186. [PMID: 32641039 PMCID: PMC7346418 DOI: 10.1186/s12916-020-01638-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 05/15/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Release of virus-blocking Wolbachia-infected mosquitoes is an emerging disease control strategy that aims to control dengue and other arboviral infections. Early entomological data and modelling analyses have suggested promising outcomes, and wMel Wolbachia releases are now ongoing or planned in 12 countries. To help inform government, donor, or philanthropist decisions on scale-up beyond single city releases, we assessed this technology's cost-effectiveness under alternative programmatic options. METHODS Using costing data from existing Wolbachia releases, previous dynamic model-based estimates of Wolbachia effectiveness, and a spatially explicit model of release and surveillance requirements, we predicted the costs and effectiveness of the ongoing programme in Yogyakarta City and three new hypothetical programmes in Yogyakarta Special Autonomous Region, Jakarta, and Bali. RESULTS We predicted Wolbachia to be a highly cost-effective intervention when deployed in high-density urban areas with gross cost-effectiveness below $1500 per DALY averted. When offsets from the health system and societal perspective were included, such programmes even became cost saving over 10-year time horizons with favourable benefit-cost ratios of 1.35 to 3.40. Sequencing Wolbachia releases over 10 years could reduce programme costs by approximately 38% compared to simultaneous releases everywhere, but also delays the benefits. Even if unexpected challenges occurred during deployment, such as emergence of resistance in the medium-term or low effective coverage, Wolbachia would remain a cost-saving intervention. CONCLUSIONS Wolbachia releases in high-density urban areas are expected to be highly cost-effective and could potentially be the first cost-saving intervention for dengue. Sites with strong public health infrastructure, fiscal capacity, and community support should be prioritised.
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Affiliation(s)
- Oliver J Brady
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK.
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK.
| | - Dinar D Kharisma
- Heller School for Social Policy and Management, Brandeis University,, Waltham, MA, USA
| | - Nandyan N Wilastonegoro
- Faculty of Medicine, Public Health and Nursing, Gadjah Mada University, Yogyakarta, Indonesia
| | - Kathleen M O'Reilly
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Disease Control, Faculty of Infectious Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Emilie Hendrickx
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Leonardo S Bastos
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Laith Yakob
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene & Tropical Medicine, London, UK
- Department of Disease Control, Faculty of Infectious Tropical Diseases, London School of Hygiene & Tropical Medicine, London, UK
| | - Donald S Shepard
- Heller School for Social Policy and Management, Brandeis University,, Waltham, MA, USA
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Cheung C, Gamez S, Carballar-Lejarazú R, Ferman V, Vásquez VN, Terradas G, Ishikawa J, Schairer CE, Bier E, Marshall JM, James AA, Akbari OS, Bloss CS. Translating gene drive science to promote linguistic diversity in community and stakeholder engagement. Glob Public Health 2020; 15:1551-1565. [PMID: 32589115 DOI: 10.1080/17441692.2020.1779328] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Information about genetic engineering (GE) for vector control in the United States is disseminated primarily in English, though non-English speakers are equally, and in some geographic regions even more affected by such technologies. Non-English-speaking publics should have equal access to such information, which is especially critical when the technology in question may impact whole communities. We convened an interdisciplinary workgroup to translate previously developed narrated slideshows on gene drive mosquitoes from English into Spanish, reviewing each iteration for scientific accuracy and accessibility to laypeople. Using the finalised stimuli, we conducted five online, chat-based focus groups with Spanish-speaking adults from California. Overall, participants expressed interest in the topic and were able to summarise the information presented in their own words. Importantly, participants asked for clarification and expressed scepticism about the information presented, indicating critical engagement with the material. Through collaboration with Spanish-speaking scientists engaged in the development of GE methods of vector control, we translated highly technical scientific information into Spanish that successfully engaged Spanish-speaking participants in conversations about this topic. In this manuscript, we document the feasibility of consulting Spanish-speaking publics about a complex emerging technology by drawing on the linguistic diversity of the scientific teams developing the technology.
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Affiliation(s)
- Cynthia Cheung
- The Qualcomm Institute, Calit2, UC San Diego, La Jolla, CA, USA
| | - Stephanie Gamez
- Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA, USA
| | | | - Victor Ferman
- Division of Biostatistics & Epidemiology, School of Public Health, UC Berkeley, Berkeley, CA, USA
| | - Váleri N Vásquez
- Division of Biostatistics & Epidemiology, School of Public Health, UC Berkeley, Berkeley, CA, USA.,Innovative Genomics Institute, UC Berkeley, Berkeley, CA, USA.,Energy and Resources Group, UC Berkeley, Berkeley, CA, USA.,Berkeley Institute for Data Science, UC Berkeley, Berkeley, CA, USA
| | - Gerard Terradas
- Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA, USA.,Tata Institute for Genetics and Society, UC San Diego, La Jolla, CA, USA
| | - Judy Ishikawa
- Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA, USA
| | - Cynthia E Schairer
- Department of Family Medicine and Public Health, School of Medicine, UC San Diego, La Jolla, CA, USA
| | - Ethan Bier
- Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA, USA.,Tata Institute for Genetics and Society, UC San Diego, La Jolla, CA, USA
| | - John M Marshall
- Division of Biostatistics & Epidemiology, School of Public Health, UC Berkeley, Berkeley, CA, USA.,Innovative Genomics Institute, UC Berkeley, Berkeley, CA, USA
| | - Anthony A James
- Department of Microbiology and Molecular Genetics, UC Irvine, Irvine, CA, USA.,Department of Molecular Biology & Biochemistry, UC Irvine, Irvine, CA, USA
| | - Omar S Akbari
- Section of Cell and Developmental Biology, UC San Diego, La Jolla, CA, USA.,Tata Institute for Genetics and Society, UC San Diego, La Jolla, CA, USA
| | - Cinnamon S Bloss
- The Qualcomm Institute, Calit2, UC San Diego, La Jolla, CA, USA.,Department of Family Medicine and Public Health, School of Medicine, UC San Diego, La Jolla, CA, USA
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Hustedt JC, Boyce R, Bradley J, Hii J, Alexander N. Use of pyriproxyfen in control of Aedes mosquitoes: A systematic review. PLoS Negl Trop Dis 2020; 14:e0008205. [PMID: 32530915 PMCID: PMC7314096 DOI: 10.1371/journal.pntd.0008205] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 06/24/2020] [Accepted: 03/10/2020] [Indexed: 01/11/2023] Open
Abstract
Dengue is the most rapidly spreading arboviral disease in the world. The current lack of fully protective vaccines and clinical therapeutics creates an urgent need to identify more effective means of controlling Aedes mosquitos, principally Aedes aegypti, as the main vector of dengue. Pyriproxyfen (PPF) is an increasingly used hormone analogue that prevents juvenile Aedes mosquitoes from becoming adults and being incapable of transmitting dengue. The objectives of the review were to (1) Determine the effect of PPF on endpoints including percentage inhibition of emergence to adulthood, larval mortality, and resistance ratios; and (2) Determine the different uses, strengths, and limitations of PPF in control of Aedes. A systematic search was applied to Pubmed, EMBASE, Web of Science, LILACS, Global Health, and the Cochrane database of Systematic Reviews. Out of 1,369 records, 90 studies met the inclusion criteria. Nearly all fit in one of the following four categories 1) Efficacy of granules, 2) Auto-dissemination/horizontal transfer, 3) use of ultra-low volume thermal fogging (ULV), thermal fogging (TF), or fumigant technologies, and 4) assessing mosquito resistance. PPF granules had consistently efficacious results of 90-100% inhibition of emergence for up to 90 days. The evidence is less robust but promising regarding PPF dust for auto-dissemination and the use of PPF in ULV, TF and fumigants. Several studies also found that while mosquito populations were still susceptible to PPF, the lethal concentrations increased among temephos-resistant mosquitoes compared to reference strains. The evidence is strong that PPF does increase immature mortality and adult inhibition in settings represented in the included studies, however future research should focus on areas where there is less evidence (e.g. auto-dissemination, sprays) and new use cases for PPF. A better understanding of the biological mechanisms of cross-resistance between PPF, temephos, and other insecticides will allow control programs to make better informed decisions.
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Affiliation(s)
- John Christian Hustedt
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Epidemiology Department, Malaria Consortium, London, United Kingdom
| | - Ross Boyce
- Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - John Bradley
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Jeffrey Hii
- Epidemiology Department, Malaria Consortium, London, United Kingdom
| | - Neal Alexander
- MRC Tropical Epidemiology Group, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
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Hirsch F, Lemaitre C, Chneiweiss H, Montoliu L. Genome Editing: Promoting Responsible Research. Pharmaceut Med 2020; 33:187-191. [PMID: 31933285 DOI: 10.1007/s40290-019-00276-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
For more than 40 years, scientists have been developing tools and technologies for genome modification; however, initial progress was slow and few outside of the molecular biology community took an interest in the field. Everything has dramatically changed with the recent appearance of the so-called precision approaches, and especially with the 'CRISPR (Clustered Regularly Interspaced Short Palindromic Repeat) revolution'. With great powers come great responsibilities. CRISPR-derived technologies have been proven efficient, cheap, rather easy and fast, and provided universal access to genome modification techniques beyond the leading research centers and reference laboratories. The popularization of techniques to manipulate the human genome and that of all other living beings consequently raises many essential questions, on the ethical and legal sides, both for the scientific community and the lay public. In order to mitigate excessive hype and concern among citizens, a call for the mobilization of the various stakeholders is now urgent through a global governance of genome editing.
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Affiliation(s)
- François Hirsch
- Ethics Committee, Institut National de la Santé et de la Recherche Medicale (INSERM), Paris, France.
- Centre National de la Recherche Scientifique (CNRS), Paris, France.
| | - Christine Lemaitre
- Ethics Committee, Institut National de la Santé et de la Recherche Medicale (INSERM), Paris, France
- Centre National de la Recherche Scientifique (CNRS), Paris, France
| | - Hervé Chneiweiss
- Ethics Committee, Institut National de la Santé et de la Recherche Medicale (INSERM), Paris, France
- Sorbonne Universités, Paris, France
- Centre National de la Recherche Scientifique (CNRS), Paris, France
- Institut National de la Santé et de la Recherche Medicale (INSERM), Paris, France
- Institut de Biologie Paris Seine (IBPS), Paris, France
- Neuroscience Paris Seine (NPS), Paris, France
| | - Lluis Montoliu
- National Centre for Biotechnology (CNB-CSIC), Madrid, Spain
- Biomedical Research Networking Centre on Rare Diseases (CIBERER-ISCIII), Madrid, Spain
- CSIC Ethics Committee, Madrid, Spain
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42
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Shin J, Jung J. First record of the complete mitochondrial genome of Aedes koreicus (Edwards, 1917) (Diptera: Culicidae) in South Korea. Mitochondrial DNA B Resour 2020. [DOI: 10.1080/23802359.2020.1756947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Jiyeong Shin
- The Division of EcoCreative, Ewha Womans University, Seoul, Korea
| | - Jongwoo Jung
- The Division of EcoCreative, Ewha Womans University, Seoul, Korea
- Department of Science Education, Ewha Womans University, Seoul, Korea
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43
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Sasmita HI, Tu WC, Bong LJ, Neoh KB. Effects of larval diets and temperature regimes on life history traits, energy reserves and temperature tolerance of male Aedes aegypti (Diptera: Culicidae): optimizing rearing techniques for the sterile insect programmes. Parasit Vectors 2019; 12:578. [PMID: 31823817 PMCID: PMC6905064 DOI: 10.1186/s13071-019-3830-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 12/02/2019] [Indexed: 12/16/2022] Open
Abstract
Background Producing high quality sterile males is vital in Aedes aegypti rear-and-release birth control strategies. Larval diets, rearing temperatures, and their interactions determine the accumulation rates of essential nutrients in larvae, but these factors have been understudied in relation to mass-rearing techniques for producing eminent males. Methods We compared the effects of two larval diets, a cereal-legume-based diet (Khan’s diet) and a standard larval diet developed in the FAO/IAEA Insect Pest Control Laboratory (IAEA 2 diet). Diets were tested at selected temperatures for both larval and male adult life history traits, adult extreme temperature tolerance, and mating capacity relative to energy reserves of reared male adult Ae. aegypti. Results Khan’s diet resulted in shorter immature development time at each test temperature (except for 25 °C) than an IAEA 2 diet. Larvae reared at 28 °C and 32 °C with Khan’s diet demonstrated low pupation rates (c.80%). We accounted for these phenomena as secondary sex ratio manipulation, because a higher proportion of male adults emerged at 28 °C and 32 °C than that for the IAEA 2 diet. In general, the pupal development time shortened as temperature increased, resulting in higher teneral energy reserves in male mosquitoes. High energy reserves allowed male mosquitoes reared with Khan’s diet to have higher adult longevity (5–6 days longer when sugar-fed and 2–3 days longer when water-fed) and tolerance of heat stress than those fed on the IAEA 2 diet. The IAEA 2 diet produced larger male mosquitoes than Khan’s diet did: mosquitoes fed on Khan’s diet were 1.03–1.05 times smaller than those fed on the IAEA 2 diet at 28 °C and 32 °C. No evidence indicated reduced mating capacity for small mosquitoes fed on Khan’s diet. Conclusions Larvae reared at 28 °C and 32 °C with Khan’s diet were characterized by shorter immature development time compared with those fed on the IAEA 2 diet. Adult mosquitoes produced from that larval rearing condition exhibited a significant male bias, long lifespan, and better endurance against extreme temperatures relative to energy reserves. Thus, the larval diet at rearing temperature of 28 °C and 32 °C optimized rearing techniques for the sterile insect programmes. However, mating competitiveness and flight performance of adult males require further investigation.
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Affiliation(s)
- Hadian Iman Sasmita
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung, 402, Taiwan.,Center for Isotopes and Radiation Application (CIRA), National Nuclear Energy Agency (BATAN), Jl. Lebak Bulus Raya No. 49, Jakarta, 12440, Indonesia
| | - Wu-Chun Tu
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung, 402, Taiwan
| | - Lee-Jin Bong
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung, 402, Taiwan
| | - Kok-Boon Neoh
- Department of Entomology, National Chung Hsing University, 145, Xingda Rd. South District, Taichung, 402, Taiwan.
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Liu T, Yang WQ, Xie YG, Liu PW, Xie LH, Lin F, Li CY, Gu JB, Wu K, Yan GY, Chen XG. Construction of an efficient genomic editing system with CRISPR/Cas9 in the vector mosquito Aedes albopictus. INSECT SCIENCE 2019; 26:1045-1054. [PMID: 30311353 DOI: 10.1111/1744-7917.12645] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/04/2018] [Accepted: 09/17/2018] [Indexed: 06/08/2023]
Abstract
Aedes (Stegomyia) albopictus, also known as the Asian tiger mosquito, is a mosquito which originated in Asia. In recent years, it has become increasingly rampant throughout the world. This mosquito can transmit several arboviruses, including dengue, Zika and chikungunya viruses, and is considered a public health threat. Despite the urgent need of genome engineering to analyze specific gene functions, progress in genetical manipulation of Ae. albopictus has been slow due to a lack of efficient methods and genetic markers. In the present study, we established targeted disruptions in two genes, kynurenine hydroxylase (kh) and dopachrome conversion enzyme (yellow), to analyze the feasibility of generating visible phenotypes with genome editing by the clustered regularly interspaced short palindromic repeats (CRISPR) / CRISPR-associated protein 9 (Cas9) system in Ae. albopictus. Following Cas9 single guide RNA ribonucleoprotein injection into the posterior end of pre-blastoderm embryos, 30%-50% of fertile survivors produced alleles that failed to complement existing kh and yellow mutations. Complete eye and body pigmentation defects were readily observed in G1 pupae and adults, indicating successful generation of highly heritable mutations. We conclude that the CRISPR/Cas9-mediated gene editing system can be used in Ae. albopictus and that it can be adopted as an efficient tool for genome-scale analysis and biological study.
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Affiliation(s)
- Tong Liu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Wen-Qiang Yang
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Yu-Gu Xie
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Pei-Wen Liu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Li-Hua Xie
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Feng Lin
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Chen-Ying Li
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Jin-Bao Gu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Kun Wu
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Gui-Yun Yan
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
| | - Xiao-Guang Chen
- Department of Pathogen Biology, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, China
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Pereira Cabral B, da Graça Derengowski Fonseca M, Mota FB. Long term prevention and vector control of arboviral diseases: What does the future hold? Int J Infect Dis 2019; 89:169-174. [DOI: 10.1016/j.ijid.2019.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 10/01/2019] [Accepted: 10/02/2019] [Indexed: 12/23/2022] Open
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46
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Aldersley A, Pongsiri A, Bunmee K, Kijchalao U, Chittham W, Fansiri T, Pathawong N, Qureshi A, Harrington LC, Ponlawat A, Cator LJ. Too "sexy" for the field? Paired measures of laboratory and semi-field performance highlight variability in the apparent mating fitness of Aedes aegypti transgenic strains. Parasit Vectors 2019; 12:357. [PMID: 31324262 PMCID: PMC6642483 DOI: 10.1186/s13071-019-3617-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 07/13/2019] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Evaluating and improving mating success and competitive ability of laboratory-reared transgenic mosquito strains will enhance the effectiveness of proposed disease-control strategies that involve deployment of transgenic strains. Two components of the mosquito rearing process, larval diet quantity and aquatic environment - which are linked to physiological and behavioural differences in adults - are both relatively easy to manipulate. In mosquitoes, as for many other arthropod species, the quality of the juvenile habitat is strongly associated with adult fitness characteristics, such as longevity and fecundity. However, the influence of larval conditioning on mating performance is poorly understood. Here, we investigated the combined effects of larval diet amount and environmental water source on adult male mating success in a genetically modified strain of Aedes aegypti mosquitoes in competition with wild-type conspecifics. Importantly, this research was conducted in a field setting using low generation laboratory and wild-type lines. RESULTS By controlling larval diet (high and low) and rearing water source (field-collected and laboratory water), we generated four treatment lines of a genetically modified strain of Ae. aegypti tagged with fluorescent sperm. Laboratory reared mosquitoes were then competed against a low generation wild-type colony in a series of laboratory and semi-field mating experiments. While neither food quantity nor larval aquatic environment were found to affect male mating fitness, the transgenic lines consistently outperformed wild-types in laboratory competition assays, an advantage that was not conferred to semi-field tests. CONCLUSIONS Using a model transgenic system, our results indicate that differences in the experimental conditions of laboratory- and field-based measures of mating success can lead to variation in the perceived performance ability of modified strains if they are only tested in certain environments. While there are many potential sources of variation between laboratory and field lines, laboratory adaptation - which may occur over relatively few generations in this species - may directly impact mating ability depending on the context in which it is measured. We suggest that colony-hybridization with field material can potentially be used to mitigate these effects in a field setting. Release programs utilising mass-produced modified laboratory strains should incorporate comparative assessments of quality in candidate lines.
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Affiliation(s)
- Andrew Aldersley
- Department of Life Sciences, Imperial College London, Silwood Park, Ascot, UK
| | - Arissara Pongsiri
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Kamonchanok Bunmee
- Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Udom Kijchalao
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Wachiraphan Chittham
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Thanyalak Fansiri
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Nattaphol Pathawong
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Alima Qureshi
- Department of Life Sciences, Imperial College London, Silwood Park, Ascot, UK
| | | | - Alongkot Ponlawat
- Vector Biology and Control Section, Department of Entomology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Lauren J. Cator
- Department of Life Sciences, Imperial College London, Silwood Park, Ascot, UK
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Rückert C, Prasad AN, Garcia-Luna SM, Robison A, Grubaugh ND, Weger-Lucarelli J, Ebel GD. Small RNA responses of Culex mosquitoes and cell lines during acute and persistent virus infection. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2019; 109:13-23. [PMID: 30959110 PMCID: PMC6516063 DOI: 10.1016/j.ibmb.2019.04.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 04/01/2019] [Accepted: 04/02/2019] [Indexed: 05/31/2023]
Abstract
RNA interference is a crucial antiviral mechanism in arthropods, including in mosquito vectors of arthropod-borne viruses (arboviruses). Although the exogenous small interfering RNA (siRNA) pathway constitutes an efficient antiviral response in mosquitoes, virus-derived P-element induced wimpy testis (PIWI)-interacting RNAs (piRNAs) have been implicated in the response to alpha-, bunya- and flaviviruses in Aedes spp. mosquitoes. Culex mosquitoes transmit several medically important viruses including West Nile virus (WNV), but are considerably less well studied than Aedes mosquitoes and little is known about antiviral RNA interference in Culex mosquitoes. Therefore, we sequenced small RNA (sRNA) libraries from different Culex cell lines and tissues infected with WNV. The clear majority of virus-derived sRNA reads were 21 nt siRNAs in all cell lines and tissues tested, with no evidence for a role of WNV-derived piRNAs. Additionally, we aligned sRNA reads from Culex quinquefasciatus Hsu cells to the insect-specific rhabdovirus, Merida virus, which persistently replicates in these cells. We found that a significant proportion of the sRNA response to Merida virus consisted of piRNAs. Since viral DNA forms have been implicated in siRNA and piRNA responses of Aedes spp. mosquitoes, we also tested for viral DNA forms in WNV infected Culex cells. We detected viral DNA in Culex tarsalis cells infected with WNV and, to a lesser amount, WNV and Merida virus-derived DNA in Culex quinquefasciatus Hsu cells. In conclusion, Hsu cells generated Merida virus-derived piRNAs, but our data suggests that the major sRNA response of Culex cells and mosquitoes to WNV infection is the exogenous siRNA response. It is also evident that sRNA responses differ significantly between specific virus-mosquito combinations. Future work using additional Culex-borne viruses may further elucidate how virus-derived piRNAs are generated in Culex cells and what role they may play in controlling replication of different viruses.
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Affiliation(s)
- Claudia Rückert
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA.
| | - Abhishek N Prasad
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA; Department of Pathology, Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA
| | - Selene M Garcia-Luna
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA; Department of Entomology, Texas A&M University, College Station, TX, USA
| | - Alexis Robison
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA
| | - Nathan D Grubaugh
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA; Yale School of Public Health, Department of Epidemiology of Microbial Diseases, Laboratory of Epidemiology of Public Health, New Haven, CT, USA
| | - James Weger-Lucarelli
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA; Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Gregory D Ebel
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523, USA.
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Engineered resistance to Zika virus in transgenic Aedes aegypti expressing a polycistronic cluster of synthetic small RNAs. Proc Natl Acad Sci U S A 2019; 116:3656-3661. [PMID: 30723148 PMCID: PMC6397566 DOI: 10.1073/pnas.1810771116] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Here, we describe the generation of Aedes aegypti mosquitoes that are engineered to be resistant to Zika virus (ZIKV) transmission. Our results demonstrate that engineered mosquitoes express a polycistronic cluster of synthetic small RNAs designed to target the ZIKV genome. As a result, homozygous mosquitoes were refractory to ZIKV infection, and therefore could not transmit the virus. Additionally, mosquitoes heterozygous for the transgene showed significantly lower levels of viral infection, dissemination, and transmission compared with wild-type mosquitoes; importantly, these levels were low enough to make such mosquitoes unlikely to transmit ZIKV to a susceptible host. Finally, we discuss how such an engineering approach can be used to combat the major health burden of ZIKV, and potentially other arboviruses, in the future. Recent Zika virus (ZIKV) outbreaks have highlighted the necessity for development of novel vector control strategies to combat arboviral transmission, including genetic versions of the sterile insect technique, artificial infection with Wolbachia to reduce population size and/or vectoring competency, and gene drive-based methods. Here, we describe the development of mosquitoes synthetically engineered to impede vector competence to ZIKV. We demonstrate that a polycistronic cluster of engineered synthetic small RNAs targeting ZIKV is expressed and fully processed in Aedes aegypti, ensuring the formation of mature synthetic small RNAs in the midgut where ZIKV resides in the early stages of infection. Critically, we demonstrate that engineered Ae. aegypti mosquitoes harboring the anti-ZIKV transgene have significantly reduced viral infection, dissemination, and transmission rates of ZIKV. Taken together, these compelling results provide a promising path forward for development of effective genetic-based ZIKV control strategies, which could potentially be extended to curtail other arboviruses.
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Human T cell leukemia virus type 1 and Zika virus: tale of two reemerging viruses with neuropathological sequelae of public health concern. J Neurovirol 2019; 25:289-300. [PMID: 30693421 DOI: 10.1007/s13365-019-00720-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/16/2018] [Accepted: 01/03/2019] [Indexed: 01/17/2023]
Abstract
Human T cell leukemia virus type 1 (HTLV-1) and Zika virus (ZIKV) have been considered neglected viruses of low public health concern until recently when incidences of HTLV-1 and ZIKV were observed to be linked to serious immune-related disease and neurological complications. This review will discuss the epidemiology, genomic evolution, virus-host interactions, virulence factors, neuropathological sequelae, and current perspectives of these reemerging viruses. There are no FDA-approved therapeutics or vaccines against these viruses, and as such, it is important for clinical trials to focus on developing vaccines that can induce cell-mediated immune response to confer long-term protective immunity. Furthermore, attention should be paid to reducing the transmission of these viruses through unprotected sex, infected blood during sharing of contaminated needles, donated blood and organs, and vertical transmission from mother to baby via breastfeeding. There is an urgent need to re-evaluate repurposing current antiviral therapies as well as developing novel antiviral agents with enhanced efficacy due to the high morbidity rate associated with these two reemerging chronic viral diseases.
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50
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Su J, Wang G, Li C, Xing D, Yan T, Zhu X, Liu Q, Wu Q, Guo X, Zhao T. Screening for differentially expressed miRNAs in Aedes albopictus (Diptera: Culicidae) exposed to DENV-2 and their effect on replication of DENV-2 in C6/36 cells. Parasit Vectors 2019; 12:44. [PMID: 30658692 PMCID: PMC6339288 DOI: 10.1186/s13071-018-3261-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 12/05/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND The mosquito Aedes albopictus is an important vector for dengue virus (DENV) transmission. The midgut is the first barrier to mosquito infection by DENV, and this barrier is a critical factor affecting the vector competence of the mosquito. However, the molecular mechanism of the interaction between midgut and virus is unknown. RESULTS Six small libraries of Ae. albopictus midgut RNAs were constructed, three of which from mosquitoes that were infected with DENV-2 after feeding on infected blood, and another three that remained uninfected with DENV-2 after feeding on same batch of infected blood. A total of 46 differentially expressed miRNAs were identified of which 17 significant differentially expressed miRNAs were selected. Compared to microRNA expression profiles of mosquitoes that were uninfected with DENV-2, 15 microRNAs were upregulated and two were downregulated in mosquitoes that were infected with DENV-2. Among these differentially expressed microRNAs, miR-1767, miR-276-3p, miR-4448 and miR-622 were verified by stem-loop qRT-PCR in samples from seven-day-infected and uninfected midguts and chosen for an in vitro transient transfection assay. miR-1767 and miR-276-3p enhanced dengue virus replication in C6/36 cells, and miR-4448 reduced dengue virus replication. CONCLUSIONS To our knowledge, this study is the first to reveal differences in expression levels between mosquitoes infected and uninfected with DENV-2 after feeding on an infected blood meal. It provides useful information on microRNAs expressed in the midgut of Aedes albopictus after exposure to the virus.
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Affiliation(s)
- Jianxin Su
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China.,Center for Disease Control and Prevention of Guangzhou Military Region, Guangzhou, 510507, People's Republic of China
| | - Gang Wang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China.,Hangzhou Customs District, Hangzhou, 310012, People's Republic of China
| | - Chunxiao Li
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Dan Xing
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Ting Yan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Xiaojuan Zhu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Qinmei Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Qun Wu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China
| | - Xiaoxia Guo
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China.
| | - Tongyan Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, 100071, People's Republic of China.
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