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Molecular Characterization of Octopamine/Tyramine Receptor Gene of Amitraz-Resistant Rhipicephalus ( Boophilus) decoloratus Ticks from Uganda. Microorganisms 2022; 10:microorganisms10122384. [PMID: 36557637 PMCID: PMC9788083 DOI: 10.3390/microorganisms10122384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 11/21/2022] [Accepted: 11/22/2022] [Indexed: 12/04/2022] Open
Abstract
We previously reported the emergence of amitraz-resistant Rhipicephalus (Boophilus) decoloratus ticks in the western region of Uganda. This study characterized the octopamine/tyramine receptor gene (OCT/Tyr) of amitraz-resistant and -susceptible R. (B.) decoloratus ticks from four regions of Uganda. The OCT/Tyr gene was amplified from genomic DNA of 17 R. (B.) decoloratus larval populations of known susceptibility to amitraz. The amplicons were purified, cloned and sequenced to determine mutations in the partial coding region of the OCT/Tyr gene. The amplified R. (B.) decoloratus OCT/Tyr gene was 91-100% identical to the R. (B.) microplus OCT/Tyr gene. Up to 24 single nucleotide polymorphisms (SNPs) were found in the OCT/Tyr gene from ticks obtained from high acaricide pressure areas, compared to 8 from the low acaricide pressure areas. A total of eight amino acid mutations were recorded in the partial OCT/Tyr gene from ticks from the western region, and four of them were associated with amitraz-resistant tick populations. The amino acid mutations M1G, L16F, D41G and V72A were associated with phenotypic resistance to amitraz with no specific pattern. Phylogenetic analysis revealed that the OCT/Tyr gene sequence from this study clustered into two distinct groups that separated the genotype from high acaricide pressure areas from the susceptible populations. In conclusion, this study is the first to characterize the R. (B.) decoloratus OCT/Tyr receptor gene and reports four novel amino acid mutations associated with phenotypic amitraz resistance in Uganda. However, lack of mutations in the ORF of the OCT/Tyr gene fragment for some of the amitraz-resistant R. (B.) decoloratus ticks could suggest that other mechanisms of resistance may be responsible for amitraz resistance, hence the need for further investigation.
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Hu YMQ, Feng HW, Liu S, Liu C, Zhao PY, Zhang M, Zhang L, Zhao J, Li JZ, Yu XM, Liu HS, Zhu JF. The preparation of polyclonal antibody against chlordimeform and establishment of detection by indirect competitive ELISA. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:114-124. [PMID: 35049417 DOI: 10.1080/03601234.2022.2029274] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
UNLABELLED Objective: Chlordimeform is a chemical pesticide that is highly carcinogenic and toxic. The purpose of this study was to establish an enzyme-linked immunosorbent assay (ELISA) method for the detection of chlordimeform in aquaculture and fish farming. METHODS Chlordimeform was coupled with bovine serum albumin (BSA) and ovalbumin (OVA) as carrier proteins. A chlordimeform-BSA conjugate was used as an immunogen, and chlordimeform-OVA was used as a coating antigen. Chlordimeform-BSA was used to immunize rabbits, and a polyclonal antibody was prepared. An indirect competitive enzyme-linked immunosorbent assay (IC-ELISA) was established to detect chlordimeform. RESULTS The working range of the established IC-ELISA method for chlordimeform detection was 1-20 ng/mL. The IC50 was 3.126 ng/mL, and the lower limit of detection (LOD) of chlordimeform was 0.637 ng/mL. The recovery of chlordimeform from spiked water samples ranged from 81% to 107%. CONCLUSION An anti-chlordimeform polyclonal antibody was successfully developed, and a novel IC-ELISA was established to detect chlordimeform in aquaculture.
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Affiliation(s)
| | - Hua-Wei Feng
- School of Pharmacy, Liaoning University, Shenyang, China
| | - Shuai Liu
- Non-Commissioned Officer School, Army Medical University, Shijiazhuang, China
| | - Chang Liu
- School of Pharmacy, Liaoning University, Shenyang, China
| | - Peng-Yan Zhao
- School of Life Sciences, Liaoning University, Shenyang, China
| | - Man Zhang
- School of Life Sciences, Liaoning University, Shenyang, China
| | - Li Zhang
- School of Life Sciences, Liaoning University, Shenyang, China
| | - Jian Zhao
- School of Life Sciences, Liaoning University, Shenyang, China
| | | | - Xiao-Miao Yu
- School of Life Sciences, Liaoning University, Shenyang, China
| | - Hong-Sheng Liu
- School of Pharmacy, Liaoning University, Shenyang, China
| | - Jun-Feng Zhu
- Department of Clinical Laboratory, Affiliated Hospital of Guilin Medical University, Guilin, China
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Zhou Z, Zhao Y, Zhou D, Li L, Luo H, Cui L, Yang W. Rapid and efficient synthesis of formamidines in a catalyst-free and solvent-free system. RSC Adv 2021; 11:33868-33871. [PMID: 35497291 PMCID: PMC9042323 DOI: 10.1039/d1ra06809a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 09/21/2021] [Indexed: 12/15/2022] Open
Abstract
An operationally rapid and efficient synthesis of N-sulfonyl formamidines that proceeds under mild conditions was achieved by reaction of a mixture of an amine, a sulfonyl azide, and a terminal ynone under catalyst-free and solvent-free conditions. Terminal ynones provide the C source to formamidines via complete cleavage of C[triple bond, length as m-dash]C.
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Affiliation(s)
- Zitong Zhou
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Yu Zhao
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Donghua Zhou
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Li Li
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Hui Luo
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhanjiang) Zhanjiang Guangdong 524023 China
| | - Liao Cui
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
| | - Weiguang Yang
- Guangdong Key Laboratory for Research and Development of Natural Drugs, The Marine Biomedical Research Institute, Guangdong Medical University Zhanjiang 524023 China
- The Marine Biomedical Research Institute of Guangdong Zhanjiang Zhanjiang Guangdong 524023 China
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Tang T, Zhao M, Wang P, Huang S, Fu W. Control efficacy and joint toxicity of thiamethoxam mixed with spirotetramat against the Asian citrus psyllid, Diaphorina citri Kuwayama. PEST MANAGEMENT SCIENCE 2021; 77:168-176. [PMID: 32652756 DOI: 10.1002/ps.6004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/26/2020] [Accepted: 07/11/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama, is one of the most devastating pests in citrus orchards, and has caused huge economic losses worldwide. Chemical control is the most effective way for psyllid control. Herein, the toxicity of nine insecticides to ACP adults and the joint action of thiamethoxam + spirotetramat were determined by a topical application method in the laboratory; field plot experiments were conducted to evaluate the control efficacy of one self-made thiamethoxam + spirotetramat 40% suspension concentrate (SC) comparing with thiamethoxam 21% SC, spirotetramat 22.4% SC, tolfenpyrad 15% SC and bifenthrin 100 g/L emulsifiable concentrate against ACP using foliar sprays in 2018-2019. RESULTS The highest toxicity to ACP adults was achieved by beta-cyfulthrin, bifenthrin, thiamethoxam and acetamiprid, with median lethal doses of 0.247 to 1.382 ng/adult at 24 h after treatment. High toxicity was observed by chlorpyrifos, spirotetramat and tolfenpyrad, but moderate toxicity by pyriproxyfen and buprofezin. For mixutres of thiamethoxam and spirotetramat, a 25:15 mass ratio showed the highest synergistic effect, with a co-toxicity coefficient (CTC) of 246.52; while a 10:30 mass ratio exhibited an additive effect, with a CTC of 109.84. Thiamethoxam + spirotetramat 40% SC at 60-80 mg/kg can effectively control ACP with a control efficacy of 72.92 to 99.29% during 3-30 days. Moreover, foliar sprays of all tested insecticides at the tested rates had no phytotoxic effects on citrus trees. CONCLUSION A one-time foliar spray of thiamethoxam + spirotetramat 40% SC at 80 mg/kg could be recommended to control ACP during its infestation period in citrus groves.
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Affiliation(s)
- Tao Tang
- Department of Entomology, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, Hunan Province, China
| | - Mingping Zhao
- Plant Protection and Quarantine Station, Bureau of Agriculture and Rural Affairs of Jianghua Yao Autonomous County, Jianghua, Hunan Province, China
| | - Pei Wang
- Department of Entomology, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, Hunan Province, China
| | - Shengkong Huang
- Plant Protection and Quarantine Station, Bureau of Agriculture and Rural Affairs of Jianghua Yao Autonomous County, Jianghua, Hunan Province, China
| | - Wei Fu
- Department of Entomology, Institute of Plant Protection, Hunan Academy of Agricultural Sciences, Changsha, Hunan Province, China
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Ahmed MAI, Vogel CFA. The synergistic effect of octopamine receptor agonists on selected insect growth regulators on Culex quinquefasciatus Say (Diptera: Culicidae) mosquitoes. One Health 2020; 10:100138. [PMID: 32426446 PMCID: PMC7226865 DOI: 10.1016/j.onehlt.2020.100138] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/04/2020] [Indexed: 12/26/2022] Open
Abstract
Synergistic effects of octopamine receptor agonists (OR agonists) have attracted many scientists based on their potent effects on mosquitoes. Herein, we determined the toxicity of selected insect growth regulators (IGRs) on fourth instar larvae of Culex quinquefasciatus. We evaluated the synergistic action of OR agonists on the toxicity of IGR insecticides to achieve a better understanding of their mode of action. As a result, pyriproxyfen was the most potent IGR insecticide (EC50 = 0.049 ng/ml) followed by lufenuron, novaluron, and diflubenzuron according to the IGR bioassay. Further, based on the acute bioassay, lufenuron was the most toxic IGR insecticide (LC50 = 44 ng/ml) after 24-h post treatment followed by pyriproxyfen, novaluron, and diflubenzuron (LC50 = 137, 263, and 1127 ng/ml, respectively). Similar tendency was observed after 48 and 72-h post treatment. Furthermore, OR agonists that combined with pyriproxyfen was the most significant effects after 48 and 72-h of exposure. The synergism with amitraz (AMZ) was more significant when co-treated with IGR insecticides compared to chlordimeform (CDM). These findings suggest that OR agonists are promising tools and are important alternative strategies as synergistic compounds in preventing and controlling Culex quinquefasciatus mosquitoes.
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Affiliation(s)
- Mohamed Ahmed Ibrahim Ahmed
- Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt
- Center for Health and the Environment, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Christoph Franz Adam Vogel
- Center for Health and the Environment, University of California, One Shields Avenue, Davis, CA 95616, USA
- Department of Environmental Toxicology, University of California, One Shields Avenue, Davis, CA 95616, USA
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Manzi C, Vergara-Amado J, Franco LM, Silva AX. The effect of temperature on candidate gene expression in the brain of honey bee Apis mellifera (Hymenoptera: Apidae) workers exposed to neonicotinoid imidacloprid. J Therm Biol 2020; 93:102696. [DOI: 10.1016/j.jtherbio.2020.102696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 07/27/2020] [Accepted: 08/06/2020] [Indexed: 12/12/2022]
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Ahmed MAI, Vogel CFA. Hazardous effects of octopamine receptor agonists on altering metabolism-related genes and behavior of Drosophila melanogaster. CHEMOSPHERE 2020; 253:126629. [PMID: 32283422 PMCID: PMC9888421 DOI: 10.1016/j.chemosphere.2020.126629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 05/04/2023]
Abstract
Recent reports demonstrate that octopamine receptor (OR) agonists such as formamidine pesticides cause reproductive and developmental toxicity through endocrine disrupting effects in both humans and animals. Herein, we studied the effects of different sublethal concentrations of OR agonists, Amitraz and Chlordimeform, on growth, development, and reproduction of D. melanogaster from a genotype perspective view. As a result, the sublethal concentrations for both OR agonists delayed the developmental time including pupation and eclosion. It significantly reduced the lifespan, eclosion rate, and production of eggs. The mRNA expression of genes relevant for development and metabolism was significantly changed after exposure to sublethal concentrations of both OR agonists. Octopamine receptor in mushroom bodies (Oamb), trehalase enzyme (Treh), hemocyte proliferation (RyR), and immune response (IM4) genes were upregulated whereas, trehalose sugar (Tret1-1), mixed function oxidase enzyme (Cyp9f2), lifespan (Atg7), male mating behavior (Ple), female fertility (Ddc), and lipid metabolism (Sxe2) genes were downregulated. These results support the conclusion that OR agonists activate the octopamine receptor in D. melanogaster leading to an increase of trehalase enzyme activity and degradation of trehalose sugar into free glucose which results in rapid energy exhaustion, hyperexcitation, and disturbing of the octopaminergic system in D. melanogaster.
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Affiliation(s)
- Mohamed Ahmed Ibrahim Ahmed
- Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut, 71526, Egypt; Center for Health and the Environment, USA
| | - Christoph Franz Adam Vogel
- Center for Health and the Environment, USA; Department of Environmental Toxicology, University of California, Davis, CA, 95616, USA.
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Monteiro HR, Lemos MFL, Novais SC, Soares AMVM, Pestana JLT. Amitraz toxicity to the midge Chironomus riparius: Life-history and biochemical responses. CHEMOSPHERE 2019; 221:324-332. [PMID: 30641373 DOI: 10.1016/j.chemosphere.2019.01.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 12/28/2018] [Accepted: 01/02/2019] [Indexed: 05/21/2023]
Abstract
Acute and chronic toxicity of the formamidine pesticide amitraz to the midge Chironomus riparius was assessed using conventional ecotoxicological tests and biochemical approaches (biomarkers). Amitraz is mainly used as an ectoparasiticide in veterinary medicine, but also in agriculture and apiculture. However, information of amitraz toxicity to non-target invertebrates is limited. Besides the impairment of developmental and emergence rates (reduced larval growth, emergence, and delayed development time) caused by chronic exposure to amitraz, acute exposures induced alterations in the antioxidant enzymes glutathione peroxidase (GPx) and catalase (CAT), and in energetic metabolism biomarkers, lactate dehydrogenase (LDH) and electron transport system (ETS) activities. Moreover, lipid peroxidation (LPO) increased by amitraz exposure. Our results reveal potential secondary effects of amitraz to invertebrates and biomarkers that may aid in the interpretation of sub-lethal toxic responses to amitraz. These results add information concerning the potential outcomes of amitraz exposure to freshwater invertebrates underlining the importance of risk assessment studies of formamidine pesticides.
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Affiliation(s)
- Hugo R Monteiro
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal; MARE - Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, 2520-641, Peniche, Portugal; Department of Biochemistry and Microbiology, Laboratory for Microbiology, Ghent University, B-9000, Gent, Belgium.
| | - Marco F L Lemos
- MARE - Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, 2520-641, Peniche, Portugal
| | - Sara C Novais
- MARE - Marine and Environmental Sciences Centre, ESTM, Instituto Politécnico de Leiria, 2520-641, Peniche, Portugal
| | - Amadeu M V M Soares
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - João L T Pestana
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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Endocrine Disruptor Compounds (EDCs) and agriculture: The case of pesticides. C R Biol 2017; 340:406-409. [PMID: 28826788 DOI: 10.1016/j.crvi.2017.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 07/21/2017] [Indexed: 11/20/2022]
Abstract
A number of pesticides are suspected or proved to act as endocrine disruptor compounds (EDCs). In the present survey of the literature, we try to define the main issues to be considered to classify individual pesticides as EDC or not.
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Ahmed MAI, Abd El Rah TAE, Khalid NS. Dietary Intake of Potential Pesticide Residues in Tomato Samples Marketed in Egypt. RESEARCH JOURNAL OF ENVIRONMENTAL TOXICOLOGY 2016; 10:213-219. [DOI: 10.3923/rjet.2016.213.219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Ahmed MAI, Vogel CFA. The role of octopamine receptor agonists in the synergistic toxicity of certain insect growth regulators (IGRs) in controlling Dengue vector Aedes aegypti (Diptera: Culicidae) mosquito. Acta Trop 2016; 155:1-5. [PMID: 26672383 DOI: 10.1016/j.actatropica.2015.11.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 11/17/2015] [Accepted: 11/27/2015] [Indexed: 11/16/2022]
Abstract
The synergistic action of octopamine receptor agonists (OR agonists) on many insecticide classes (e.g., organophosphorus, pyrethroids, and neonicotinoids) on Aedes aegypti L. has been reported recently. An investigation of OR agonist's effect on insect growth regulators (IGRs) was undertaken to provide a better understanding of the mechanism of action. Based on the IGR bioassay, pyriproxyfen was the most potent IGR insecticide tested (EC50=0.0019ng/ml). However, the lethal toxicity results indicate that diafenthiuron was the most potent insecticide (LC50=56ng/cm(2)) on A. aegypti adults after 24h of exposure. The same trend was true after 48 and 72h of exposure. Further, the synergistic effects of OR agonists plus amitraz (AMZ) or chlordimeform (CDM) was significant on adults. Among the tested synergists, AMZ increased the potency of the selected IGRs on adults the greatest. As results, OR agonists were largely synergistic with the selected IGRs. OR agonists enhanced the lethal toxicity of IGRs, which is a valuable new tool in the field of A. aegypti control. However, further field experiments need to be done to understand the unique potential role of OR agonists and their synergistic action on IGRs.
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Affiliation(s)
- Mohamed Ahmed Ibrahim Ahmed
- Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt; Center for Health and the Environment, One Shields Avenue, University of California, Davis, CA 95616, USA
| | - Christoph Franz Adam Vogel
- Center for Health and the Environment, One Shields Avenue, University of California, Davis, CA 95616, USA; Department of Environmental Toxicology, University of California, One Shields Avenue, Davis, CA 95616, USA.
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