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Fei X, Zhang Y, Ding L, Xiao S, Xie X, Li Y, Deng X. Development of an RNAi-based microalgal larvicide for the control of Aedes aegypti. Parasit Vectors 2021; 14:387. [PMID: 34362429 PMCID: PMC8344188 DOI: 10.1186/s13071-021-04885-1] [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: 10/30/2020] [Accepted: 07/21/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Mosquito-borne diseases affect over half of the human population globally. Multiple studies have shown that chemical insecticides are ineffective because of resistance. Therefore, environmentally safe mosquito population control tools need to be developed. Ribonucleic acid interference (RNAi) is a reverse genetic mechanism recently introduced as a new pest control tool. This technique represents a new class of biorational technology that could combat the increased global incidence of insecticide resistance. The technique has the potential of becoming a critical component of integrated vector control programs. METHODS A 3-hydroxykynurenine transaminase (3-HKT) RNAi expression plasmid was constructed, generated and transformed into Chlamydomonas and Chlorella algae. The transgenic algae were then used to feed Ae. aegypti mosquito larvae. The feeding experiments were conducted on a small and large scale with 10 and about 300 larvae, respectively. The mortality rate of the larvae was calculated over 30 days. In addition, histological examination of the insect tissues was performed to examine the extent of tissue damage. RESULTS The integumentary system and midguts of larvae fed with transgenic Chlamydomonas were severely damaged. The mortality rate of the larvae fed with transgenic Chlamydomonas ranged from 60 to 100% in small-scale tests. The survival rate of adult mosquitoes was 0.0% in a large-scale feeding experiment when the larvae were fed with transgenic Chlamydomonas. Moreover, when the larvae were fed with transgenic Chlorella, the mortality rate ranged from 6.7% to 43% compared to that fed wild-type Chlorella. CONCLUSIONS 3HKT RNAi transgenic algae are in some scales lethal to Ae. aegypti. The findings of this study indicate that technology based on microalgae RNAi may provide a new way to control mosquito populations.
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Affiliation(s)
- Xiaowen Fei
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, 571101, China
| | - Yang Zhang
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, 571101, China
| | - Lili Ding
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, 571101, China
| | - Sha Xiao
- Department of Biochemistry and Molecular Biology, Hainan Medical College, Haikou, 571101, China
| | - Xiaoqing Xie
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Haikou, 571101, China
| | - Yajun Li
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Haikou, 571101, China
| | - Xiaodong Deng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China.
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-Resources, Haikou, 571101, China.
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Gaur SK, Kumar K. Effect of the medicinal plant Withania somnifera on the development of a medico-veterinary pest Chrysomya megacephala (Diptera: Calliphoridae). INVERTEBR REPROD DEV 2021. [DOI: 10.1080/07924259.2021.1929519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Krishna Kumar
- Department of Zoology, University of Allahabad, Prayagraj, India
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Shamsi TN, Parveen R, Ahmad A, Samal RR, Kumar S, Fatima S. Inhibition of gut proteases and development of dengue vector, Aedes aegypti by Allium sativum protease inhibitor. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.chnaes.2018.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Dos Santos Moreira AM, Bittencourt VCE, Costa FLS, Elena de Lima M, Lopes MTP, Borges WS, Martins GF, Nascimento CS, da Silva JG, Denadai ÂML, Borges KB. Hydrophobic Nanoprecipitates of β-Cyclodextrin/Avermectins Inclusion Compounds Reveal Insecticide Activity against Aedes aegypti Larvae and Low Toxicity against Fibroblasts. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:7275-7285. [PMID: 29925239 DOI: 10.1021/acs.jafc.8b01300] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the present work, hydrophobic nanoprecipitates (HNPs) of inclusion complexes formed between β-cyclodextrin (βCD) and the avermectins (AVMs) named eprinomectin (EPRI) and ivermectin (IVER) were synthesized and characterized, and their larvicidal activity against Aedes aegypti and human safety against fibroblasts were evaluated. Initially, thermogravimetric analysis/differential thermal analysis data revealed that inclusion increased the thermal stability of AVMs in the presence of βCD. Nuclear magnetic resonance experiments and density functional theory calculations pointed out the inclusion of the benzofuran ring of the two AVMs in the βCD cavity. Isothermal titration calorimetry experiments allowed identification of different binding constants for EPRI/βCD ( Kb = 1060) and βCD/IVER ( Kb = 1700) systems, despite the structural similarity. Dynamic light scattering titrations of AVMs' dimethyl sulfoxide solution in βCD aqueous solution demonstrated that the formed HNPs have lower sizes in the presence of βCD. Finally, the inclusion of EPRI in βCD increased its larval toxicity and reduced its human cytotoxicity, while for IVER/βCD no beneficial effect was observed upon inclusion. These results were rationalized in terms of structural differences between the two molecules. Finally, the EPRI/βCD complex has great potential as an insecticide against A. aegypti larvae with high human safety.
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Affiliation(s)
- Ana M Dos Santos Moreira
- Departamento de Ciências Naturais , Universidade Federal de São João del-Rei , Campus Dom Bosco , 36301-160 , São João del-Rei , Minas Gerais Brazil
- Departamento de Farmácia , Universidade Federal de Juiz de Fora , Campus Governador Valadares , 35010-177 , Governador Valadares , Minas Gerais , Brazil
| | - Vanessa C E Bittencourt
- Departamento de Farmácia , Universidade Federal de Juiz de Fora , Campus Governador Valadares , 35010-177 , Governador Valadares , Minas Gerais , Brazil
| | - Fábio L S Costa
- Departamento de Bioquímica e Imunologia , Universidade Federal de Minas Gerais , 31270-901 , Belo Horizonte , Minas Gerais , Brazil
| | - Maria Elena de Lima
- Departamento de Bioquímica e Imunologia , Universidade Federal de Minas Gerais , 31270-901 , Belo Horizonte , Minas Gerais , Brazil
| | - Miriam T P Lopes
- Departamento de Farmacologia , Universidade Federal de Minas Gerais , 31270-901 , Belo Horizonte , Minas Gerais , Brazil
| | - Warley S Borges
- Departamento de Química , Universidade Federal do Espírito Santo , Campus de Goiabeiras , 29075-910 , Vitória , Espírito Santo , Brazil
| | - Gustavo F Martins
- Departamento de Biologia Geral , Universidade Federal de Viçosa , Campus Universitário , 36570-900 , Viçosa , Minas Gerais , Brazil
| | - Clébio S Nascimento
- Departamento de Ciências Naturais , Universidade Federal de São João del-Rei , Campus Dom Bosco , 36301-160 , São João del-Rei , Minas Gerais Brazil
| | - Jeferson G da Silva
- Departamento de Farmácia , Universidade Federal de Juiz de Fora , Campus Governador Valadares , 35010-177 , Governador Valadares , Minas Gerais , Brazil
| | - Ângelo M L Denadai
- Departamento de Farmácia , Universidade Federal de Juiz de Fora , Campus Governador Valadares , 35010-177 , Governador Valadares , Minas Gerais , Brazil
| | - Keyller B Borges
- Departamento de Ciências Naturais , Universidade Federal de São João del-Rei , Campus Dom Bosco , 36301-160 , São João del-Rei , Minas Gerais Brazil
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Dias LP, Oliveira JT, Rocha-Bezerra LC, Sousa DO, Costa HP, Araujo NM, Carvalho AF, Tabosa PM, Monteiro-Moreira AC, Lobo MD, Moreno FB, Rocha BA, Lopes JL, Beltramini LM, Vasconcelos IM. A trypsin inhibitor purified from Cassia leiandra seeds has insecticidal activity against Aedes aegypti. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.03.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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