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Liu B, Fu D, Ning H, Tang M, Chen H. Knockdown of CYP6CR2 and CYP6DE5 reduces tolerance to host plant allelochemicals in the Chinese white pine beetle Dendroctonus armandi. Pestic Biochem Physiol 2022; 187:105180. [PMID: 36127042 DOI: 10.1016/j.pestbp.2022.105180] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 07/01/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Bark beetles rely on detoxifying enzymes to resist the defensive terpenoids of the host tree. Insect cytochrome P450 (CYPs) plays a key role in the detoxification of pesticides and plant allelochemicals. CYP6 family is unique to Insecta, and its biochemical function is basically related to the metabolism of exogenous substances. In this study, we sequenced and characterized the full-length cDNAs of two CYP6 genes from Chinese white pine beetle, Dendroctonus armandi. Spatiotemporal expression profiling revealed that the expression of CYP6CR2 and CYP6DE5 was higher in larval and adult stages of D. armandi than that in other developmental stages, and that two genes predominantly expressed in brain, midgut, fat body, Malpighian tubules or hemolymph. The expression of CYP6CR2 and CYP6DE5 was significantly induced after feeding on the phloem of Pinus armandii and exposure to six stimuli [(±)- α -pinene, (-)-α-pinene, (-)-β-pinene, (+)-3-carene, (±)-limonene and turpentine]. Importantly, silencing CYP6CR2 and CYP6DE5 separately could increase the sensitivity, led to a significant reduction of the activity of P450, resulting a significant increase in adult mortality after treatment with terpenoids. The comprehensive results of this study showed that in the process of host selection and colonization, the functions of CYPs were mainly to hydrolyze the chemical defense of the host and degrade odor molecules. These findings may help to develop new treatments to control this important pest.
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Affiliation(s)
- Bin Liu
- College of Forestry, Northwest A&F University, Yangling 712100, China
| | - Danyang Fu
- College of Forestry, Northwest A&F University, Yangling 712100, China
| | - Hang Ning
- College of Forestry, Northwest A&F University, Yangling 712100, China
| | - Ming Tang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; College of Forestry, Northwest A&F University, Yangling 712100, China.
| | - Hui Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; College of Forestry, Northwest A&F University, Yangling 712100, China.
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2
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Djuicy DD, Hearn J, Tchouakui M, Wondji MJ, Irving H, Okumu FO, Wondji CS. CYP6P9-Driven Signatures of Selective Sweep of Metabolic Resistance to Pyrethroids in the Malaria Vector Anopheles funestus Reveal Contemporary Barriers to Gene Flow. Genes (Basel) 2020; 11:E1314. [PMID: 33167550 PMCID: PMC7694540 DOI: 10.3390/genes11111314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/24/2020] [Accepted: 10/31/2020] [Indexed: 11/16/2022] Open
Abstract
Pyrethroid resistance in major malaria vectors such as Anopheles funestus threatens malaria control efforts in Africa. Cytochrome P450-mediated metabolic resistance is best understood for CYP6P9 genes in southern Africa in An. funestus. However, we do not know if this resistance mechanism is spreading across Africa and how it relates to broader patterns of gene flow across the continent. Nucleotide diversity of the CYP6P9a gene and the diversity pattern of five gene fragments spanning a region of 120 kb around the CYP6P9a gene were surveyed in mosquitoes from southern, eastern and central Africa. These analyses revealed that a Cyp6P9a resistance-associated allele has swept through southern and eastern Africa and is now fixed in these regions. A similar diversity profile was observed when analysing genomic regions located 34 kb upstream to 86 kb downstream of the CYP6P9a locus, concordant with a selective sweep throughout the rp1 locus. We identify reduced gene flow between southern/eastern Africa and central Africa, which we hypothesise is due to the Great Rift Valley. These potential barriers to gene flow are likely to prevent or slow the spread of CYP6P9-based resistance mechanism to other parts of Africa and would to be considered in future vector control interventions such as gene drive.
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Affiliation(s)
- Delia Doreen Djuicy
- LSTM Research Unit, Centre for Research in Infectious Diseases (CRID), P.O. Box 13591 Yaoundé, Cameroon; (M.T.); (M.J.W.)
| | - Jack Hearn
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK; (J.H.); (H.I.)
| | - Magellan Tchouakui
- LSTM Research Unit, Centre for Research in Infectious Diseases (CRID), P.O. Box 13591 Yaoundé, Cameroon; (M.T.); (M.J.W.)
| | - Murielle J. Wondji
- LSTM Research Unit, Centre for Research in Infectious Diseases (CRID), P.O. Box 13591 Yaoundé, Cameroon; (M.T.); (M.J.W.)
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK; (J.H.); (H.I.)
| | - Helen Irving
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK; (J.H.); (H.I.)
| | - Fredros O. Okumu
- Environmental Health and Ecological Sciences Department, Ifakara Health Institute, PO Box 53 Ifakara 67501, Tanzania;
| | - Charles S. Wondji
- LSTM Research Unit, Centre for Research in Infectious Diseases (CRID), P.O. Box 13591 Yaoundé, Cameroon; (M.T.); (M.J.W.)
- Department of Vector Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK; (J.H.); (H.I.)
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Tang B, Cheng Y, Li Y, Li W, Ma Y, Zhou Q, Lu K. Adipokinetic hormone regulates cytochrome P450-mediated imidacloprid resistance in the brown planthopper, Nilaparvata lugens. Chemosphere 2020; 259:127490. [PMID: 32650166 DOI: 10.1016/j.chemosphere.2020.127490] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/21/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
Insect resistance to chemical insecticide is a global problem that presents an ongoing threat to sustainable agriculture. Although the increased production of detoxification enzymes has been frequently implicated in resistance development, the mechanisms employed by insecticide-resistant insects for overexpression of these genes remain elusive. Here we report that neuropeptide adipokinetic hormone (AKH) negatively regulates the expression of CYP6ER1 and CYP6AY1, two important cytochrome P450 monooxygenases (P450s) that confer resistance to neonicotinoid imidacloprid in the brown planthopper (BPH). Imidacloprid exposure suppresses AKH synthesis in the susceptible BPH, and AKH is inhibited in the imidacloprid-resistant strain. RNA interference (RNAi) and AKH peptide injection revealed that imidacloprid exposure inhibits the AKH signaling cascade and then provokes reactive oxygen species (ROS) burst. These in turn activate the transcription factors cap 'n' collar isoform-C (CncC) and muscle aponeurosis fibromatosis (MafK). RNAi and ROS scavenger assays showed that ROS induces CYP6ER1 expression by activating CncC and MafK, while ROS mediates induction of CYP6AY1 through another unidentified pathway in the resistant BPH. Collectively, these results provide new insights into the regulation of insecticide resistance and implicate both the neuropeptide AKH-mediated ROS burst and transcription factors are involved in the overexpression of P450 detoxification genes in insecticide-resistant insects.
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Affiliation(s)
- Bingjie Tang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Yibei Cheng
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Yimin Li
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Wenru Li
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Ying Ma
- School of Agriculture, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Qiang Zhou
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Kai Lu
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China.
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Zhao J, Wei Q, Gu X, Ren S, Liu X. Alcohol dehydrogenase 5 of Helicoverpa armigera interacts with the CYP6B6 promoter in response to 2-tridecanone. Insect Sci 2020; 27:1053-1066. [PMID: 31454147 PMCID: PMC7496390 DOI: 10.1111/1744-7917.12720] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/13/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Alcohol dehydrogenase 5 (ADH5) is a member of medium-chain dehydrogenase/reductase family and takes part in cellular formaldehyde and S-nitrosoglutathione metabolic network. 2-tridecanone (2-TD) is a toxic compound in many Solanaceae crops to defend against a variety of herbivory insects. In the broader context of insect development and pest control strategies, this study investigates how a new ADH5 from Helicoverpa armigera (HaADH5) regulates the expression of CYP6B6, a gene involved in molting and metamorphosis, in response to 2-TD treatment. Cloning of the HaADH5 complementary DNA sequence revealed that its 1002 bp open reading frame encodes 334 amino acids with a predicted molecular weight of 36.5 kD. HaADH5 protein was purified in the Escherichia coli Transetta (pET32a-HaADH5) strain using a prokaryotic expression system. The ability of HaADH5 protein to interact with the 2-TD responsive region within the promoter of CYP6B6 was confirmed by an in vitro electrophoretic mobility shift assay and transcription activity validation in yeast. Finally, the expression levels of both HaADH5 and CYP6B6 were found to be significantly decreased in the midgut of 6th instar larvae after 48 h of treatment with 10 mg/g 2-TD artificial diet. These results indicate that upon 2-TD treatment of cotton bollworm, HaADH5 regulates the expression of CYP6B6 by interacting with its promoter. As HaADH5 regulation of CYP6B6 expression may contribute to the larval xenobiotic detoxification, molting and metamorphosis, HaADH5 is a candidate target for controlling the growth and development of cotton bollworm.
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Affiliation(s)
- Jie Zhao
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Sciences and TechnologyXinjiang UniversityUrumqiXinjiangChina
- Key Laboratory of Oasis Agricultural Pest Management and Plant Protection Resources Utilization, College of AgricultureShihezi UniversityShiheziXinjiangChina
| | - Qian Wei
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Sciences and TechnologyXinjiang UniversityUrumqiXinjiangChina
| | - Xin‐Rong Gu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Sciences and TechnologyXinjiang UniversityUrumqiXinjiangChina
| | - Su‐Wei Ren
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Sciences and TechnologyXinjiang UniversityUrumqiXinjiangChina
| | - Xiao‐Ning Liu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Sciences and TechnologyXinjiang UniversityUrumqiXinjiangChina
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5
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Lu K, Cheng Y, Li W, Li Y, Zeng R, Song Y. Activation of CncC pathway by ROS burst regulates cytochrome P450 CYP6AB12 responsible for λ-cyhalothrin tolerance in Spodoptera litura. J Hazard Mater 2020; 387:121698. [PMID: 31791865 DOI: 10.1016/j.jhazmat.2019.121698] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/05/2019] [Accepted: 11/14/2019] [Indexed: 05/24/2023]
Abstract
Frequent insecticide use poses an environmental hazard and also selects for insecticide tolerance. Increased metabolic detoxification by cytochrome P450 monooxygenases (P450s) is the most common mechanism of insecticide tolerance. However, the underlying regulatory mechanisms remain unknown. We studied the midgut-specific P450 gene, CYP6AB12, associated with λ-cyhalothrin tolerance. Its regulatory pathway was investigated in the tobacco cutworm, Spodoptera litura (Fabricius). P450 activities and CYP6AB12 transcript levels increased after λ-cyhalothrin exposure. Inhibiting P450 activities with piperonyl butoxide and silencing CYP6AB12 by double-stranded RNA (dsRNA) injection decreased larval tolerance to λ-cyhalothrin. λ-Cyhalothrin exposure induced the expression of the cap 'n' collar isoform C (CncC) and muscle aponeurosis fibromatosis (Maf), increased hydrogen peroxide (H2O2) contents and elevated antioxidant enzyme activities. CncC knockdown by dsRNA feeding suppressed CYP6AB12 expression and decreased larval tolerance to λ-cyhalothrin. In contrast, application of the CncC agonist curcumin induced CYP6AB12 expression and enhanced insecticide tolerance. Ingestion of the reactive oxygen species (ROS) scavenger N-acetylcysteine reduced H2O2 accumulation, suppressed the expression of CncC, Maf and CYP6AB12 and led to increased larval susceptibility to λ-cyhalothrin. The results demonstrate that in S. litura, λ-cyhalothrin induces cytochrome P450 CYP6AB12 via elicitation of the ROS burst and activation of the CncC pathway.
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Affiliation(s)
- Kai Lu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Yibei Cheng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Wenru Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Yimin Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Rensen Zeng
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China
| | - Yuanyuan Song
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China; College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, PR China.
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6
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Mallott M, Hamm S, Troczka BJ, Randall E, Pym A, Grant C, Baxter S, Vogel H, Shelton AM, Field LM, Williamson MS, Paine M, Zimmer CT, Slater R, Elias J, Bass C. A flavin-dependent monooxgenase confers resistance to chlorantraniliprole in the diamondback moth, Plutella xylostella. Insect Biochem Mol Biol 2019; 115:103247. [PMID: 31626952 PMCID: PMC6880784 DOI: 10.1016/j.ibmb.2019.103247] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/06/2019] [Accepted: 10/12/2019] [Indexed: 05/07/2023]
Abstract
The diamondback moth, Plutella xylostella, is a damaging pest of cruciferous crops, and has evolved resistance to many of the insecticides used for control, including members of the diamide class. Previous work on the molecular basis of resistance to diamides has documented mutations in the target-site, the ryanodine receptor, in resistant populations of P. xylostella worldwide. In contrast the role of metabolic resistance to this insecticide class is significantly less clear. Here we show that overexpression of a flavin-dependent monooxgenase (FMO) confers resistance to the diamide chlorantraniliprole in P. xylostella. Transcriptome profiling of diamide resistant strains, with and without target-site resistance, revealed constitutive over-expression of several transcripts encoding detoxification enzymes compared to susceptible strains. Two of these, CYP6BG1, and PxFMO2 were particularly highly overexpressed (33,000 and 14,700-fold, respectively) in a resistant strain (HAW) lacking target-site resistance. After 17 generations without diamide selection the resistance of the HAW strain fell by 52-fold and the expression of PxFMO2 by > 1300-fold, however, the expression of CYP6BG1 declined by only 3-fold. Generation of transgenic Drosophila melanogaster expressing these genes demonstrated that PxFMO2, but not CYP6BG1, confers resistance in vivo. Overexpression of PxFMO2 in the HAW strain is associated with mutations, including a putative transposable element insertion, in the promoter of this gene. These enhance the expression of a reporter gene when expressed in a lepidopteran cell line suggesting they are, at least in part, responsible for the overexpression of PxFMO2 in the resistant strain. Our results provide new evidence that insect FMOs can be recruited to provide resistance to synthetic insecticides.
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Affiliation(s)
- Mark Mallott
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Sarah Hamm
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Bartlomiej J Troczka
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Emma Randall
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Adam Pym
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Charles Grant
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Simon Baxter
- School of BioSciences, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Heiko Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Anthony M Shelton
- Department of Entomology, Cornell University AgriTech, Geneva, NY, USA
| | - Linda M Field
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - Martin S Williamson
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - Mark Paine
- Liverpool School of Tropical Medicine, Liverpool, UK
| | - Christoph T Zimmer
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, Switzerland
| | - Russell Slater
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, Switzerland
| | - Jan Elias
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, Switzerland
| | - Chris Bass
- College of Life and Environmental Sciences, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK.
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Pan Y, Peng T, Xu P, Zeng X, Tian F, Song J, Shang Q. Transcription Factors AhR/ARNT Regulate the Expression of CYP6CY3 and CYP6CY4 Switch Conferring Nicotine Adaptation. Int J Mol Sci 2019; 20:E4521. [PMID: 31547315 PMCID: PMC6770377 DOI: 10.3390/ijms20184521] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/08/2019] [Accepted: 09/08/2019] [Indexed: 02/06/2023] Open
Abstract
Nicotine is one of the most toxic secondary plant metabolites in nature and it is highly toxic to herbivorous insects. The overexpression of CYP6CY3 and its homologous isozyme CYP6CY4 in Myzus persicae nicotianae is correlated with nicotine tolerance. The expanded (AC)n repeat in promoter is the cis element for CYP6CY3 transcription. These repeat sequences are conserved in the CYP6CY3 gene from Aphis gossypii and the homologous P450 genes in Acyrthosiphon pisum. The potential transcriptional factors that may regulate CYP6CY3 were isolated by DNA pulldown and sequenced in order to investigate the underlying transcriptional regulation mechanism of CYP6CY3. These identified transcriptional factors, AhR and ARNT, whose abundance was highly correlated with an abundance of the CYP6CY3 gene, were validated. RNAi and co-transfection results further confirm that AhR and ARNT play a major role in the transcriptional regulation of the CYP6CY3 gene. When the CYP6CY3 transcript is destabilized by AhR/ARNT RNAi, the transcription of the CYP6CY4 is dramatically up-regulated, indicating a compensatory mechanism between the CYP6CY3 and CYP6CY4 genes. Our present study sheds light on the CYP6CY3 and CYP6CY4 mediated nicotine adaption of M. persicae nicotianae to tobacco. The current studies shed light on the molecular mechanisms that underlie the genotypic and phenotypic changes that are involved in insect host shifts and we conclude that AhR/ARNT regulate the expression of CYP6CY3 and CYP6CY4 cooperatively, conferring the nicotine adaption of M. persicae nicotianae to tobacco.
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Affiliation(s)
- Yiou Pan
- School of Agricultural Science, Zhengzhou University, Zhengzhou 450001, China
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Tianfei Peng
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Pengjun Xu
- Institute of Tobacco Research, Chinese Academy of Agricultural Sciences, Qingdao 266101, China
| | - Xiaochun Zeng
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Fayi Tian
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Jiabao Song
- College of Plant Science, Jilin University, Changchun 130062, China
| | - Qingli Shang
- School of Agricultural Science, Zhengzhou University, Zhengzhou 450001, China.
- College of Plant Science, Jilin University, Changchun 130062, China.
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Liu J, Wu H, Zhang X, Ma W, Zhu W, Silver K, Ma E, Zhang J, Zhu KY. Metabolism of selected model substrates and insecticides by recombinant CYP6FD encoded by its gene predominately expressed in the brain of Locusta migratoria. Pestic Biochem Physiol 2019; 159:154-162. [PMID: 31400777 DOI: 10.1016/j.pestbp.2019.06.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2019] [Revised: 06/03/2019] [Accepted: 06/21/2019] [Indexed: 06/10/2023]
Abstract
The migratory locust, Locusta migartoria, is a major agricultural insect pest and its resistance to insecticides is becoming more prevalent. Cytochrome P450 monooxygenases (CYPs) are important enzymes for biotransformations of various endogenous and xenobiotic substances. These enzymes play a major role in developing insecticide resistance in many insect species. In this study, we heterologously co-expressed a CYP enzyme (CYP6FD1) and cytochrome P450 reductase (CPR) from L. migartoria in Sf9 insect cells. The recombinant enzymes were assayed for metabolic activity towards six selected model substrates (luciferin-H, luciferin-Me, luciferin-Be, luciferin-PFBE, luciferin-CEE and 7-ethoxycoumarin), and four selected insecticides (deltamethrin, chlorpyrifos, carbaryl and methoprene). Recombinant CYP6FD1 showed activity towards 7-ethoxycoumarin and luciferin-Me, but no detectable activity towards the other luciferin derivatives. Furthermore, the enzyme efficiently oxidized deltamethrin to hydroxydeltamethrin through an aromatic hydroxylation in a time-dependent manner. However, the enzyme did not show any detectable activity towards the other three insecticides. Our results provide direct evidence that CYP6FD1 is capable of metabolizing deltamethrin. This work is a step towards a more complete characterization of the catalytic capabilities of CYP6FD1 and other xenobiotic metabolizing CYP enzymes in L. migratoria.
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Affiliation(s)
- Jiao Liu
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China; College of Life Science, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Haihua Wu
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xueyao Zhang
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Wen Ma
- Modern Research Center for Traditional Chinese Medicine, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Wenya Zhu
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Kristopher Silver
- Department of Entomology, 123 Waters Hall, Kansas State University, Manhattan, KS 66506, USA
| | - Enbo Ma
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China.
| | - Jianzhen Zhang
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China.
| | - Kun Yan Zhu
- Department of Entomology, 123 Waters Hall, Kansas State University, Manhattan, KS 66506, USA.
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Tsakireli D, Riga M, Kounadi S, Douris V, Vontas J. Functional characterization of CYP6A51, a cytochrome P450 associated with pyrethroid resistance in the Mediterranean fruit fly Ceratitis capitata. Pestic Biochem Physiol 2019; 157:196-203. [PMID: 31153469 DOI: 10.1016/j.pestbp.2019.03.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 03/13/2019] [Accepted: 03/31/2019] [Indexed: 06/09/2023]
Abstract
Overexpression of the cytochrome P450 monooxygenase CYP6A51 has been previously associated with pyrethroid resistance in the Mediterranean fruit fly (medfly) Ceratitis capitata, an important pest species worldwide; however, this association has not been functionally validated. We expressed CYP6A51 gene in Escherichia coli and produced a functional enzyme with preference for the chemiluminescent substrate Luciferin-ME EGE. In vitro metabolism assays revealed that CYP6A51 is capable of metabolizing two insecticides that share the same mode of action, λ-cyhalothrin and deltamethrin, whereas no metabolism or substrate depletion was observed in the presence of spinosad or malathion. We further expressed CYP6A51 in vivo via a GAL4/UAS system in Drosophila melanogaster flies, driving expression with detoxification tissue-specific drivers. Toxicity bioassays indicated that CYP6A51 confers knock-down resistance to both λ-cyhalothrin and deltamethrin. Detection of CYP6A51 - associated pyrethroid resistance in field populations may be important for efficient Insecticide Resistance Management (IRM) strategies.
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Affiliation(s)
- Dimitra Tsakireli
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, 100 N. Plastira Street, GR-700 13, Heraklion, Crete, Greece; Laboratory of Molecular Entomology, Department of Biology, University of Crete, GR-700 13, Heraklion, Crete, Greece
| | - Maria Riga
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, 100 N. Plastira Street, GR-700 13, Heraklion, Crete, Greece
| | - Stella Kounadi
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, 100 N. Plastira Street, GR-700 13, Heraklion, Crete, Greece; Laboratory of Molecular Entomology, Department of Biology, University of Crete, GR-700 13, Heraklion, Crete, Greece
| | - Vassilis Douris
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, 100 N. Plastira Street, GR-700 13, Heraklion, Crete, Greece.
| | - John Vontas
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, 100 N. Plastira Street, GR-700 13, Heraklion, Crete, Greece; Laboratory of Pesticide Science, Department of Crop Science, Agricultural University of Athens, 75 Iera Odos Street, GR-11855 Athens, Greece.
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Li X, Shan C, Li F, Liang P, Smagghe G, Gao X. Transcription factor FTZ-F1 and cis-acting elements mediate expression of CYP6BG1 conferring resistance to chlorantraniliprole in Plutella xylostella. Pest Manag Sci 2019; 75:1172-1180. [PMID: 30471186 DOI: 10.1002/ps.5279] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/14/2018] [Accepted: 11/14/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Cytochrome P450-mediated detoxification plays an important role in the development of insecticide resistance. Previous studies have demonstrated that overexpression of CYP6BG1 was responsible for permethrin resistance in Plutella xylostella, and our experiments also showed that upregulation of this gene is associated with chlorantraniliprole resistance in P. xylostella. However, the transcriptional regulation involved in the expression of CYP6BG1 remains unknown. To further investigate the regulation of CYP6BG1 expression, the promoters of this gene were cloned and analyzed from one susceptible and four different resistant populations of P. xylostella. RESULTS First, the promoter region of P. xylostella CYP6BG1 was compared in five populations, and three types of 5'-flanking region were found. Second, the region between -562 and +49 of CYP6BG1 in a field population (TH) of P. xylostella showed the highest promoter activity and could be induced by chlorantraniliprole. Third, the transcriptional factor FTZ-F1, which is an orphan nuclear receptor and binds to the fushi tarazu (ftz) gene, was predicted by the online software Alggen and Jaspar. It was proved to regulate the expression of CYP6BG1 by RNAi. The expression levels of FTZ-F1 and CYP6BG1 could be induced by chlorantraniliprole and were significantly higher in the resistant populations. CONCLUSIONS These data give a better understanding of the transcriptional regulation of an important insecticide detoxification enzyme gene, and therefore will help in understanding the molecular mechanisms of insecticide resistance in P. xylostella. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Xiuxia Li
- Department of Entomology, Anhui Agricultural University, Hefei, People's Republic of China
- Department of Entomology, China Agricultural University, Beijing, People's Republic of China
| | - Chunyang Shan
- Department of Entomology, China Agricultural University, Beijing, People's Republic of China
| | - Fen Li
- Department of Entomology, China Agricultural University, Beijing, People's Republic of China
| | - Pei Liang
- Department of Entomology, China Agricultural University, Beijing, People's Republic of China
| | - Guy Smagghe
- Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing, People's Republic of China
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11
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Pitombeira de Figueirêdo L, Daam MA, Mainardi G, Mariën J, Espíndola ELG, van Gestel CAM, Roelofs D. The use of gene expression to unravel the single and mixture toxicity of abamectin and difenoconazole on survival and reproduction of the springtail Folsomia candida. Environ Pollut 2019; 244:342-350. [PMID: 30352348 DOI: 10.1016/j.envpol.2018.10.077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/09/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
Pesticides risk assessments have traditionally focused on the effects on standard parameters, such as mortality, reproduction and development. However, one of the first signs of adverse effects that occur in organisms exposed to stress conditions is an alteration in their genomic expression, which is specific to the type of stress, sensitive to very low contaminant concentrations and responsive in a few hours. The aim of the present study was to evaluate the single and binary mixture toxicity of commercial products of abamectin (Kraft® 36 EC) and difenoconazole (Score® 250 EC) to Folsomia candida. Laboratory toxicity tests were conducted to access the effects of these pesticides on springtail survival, reproduction and gene expression. The reproduction assays gave EC50 and EC10 values, respectively, of 6.3 and 1.4 mg a.s./kg dry soil for abamectin; 1.0 and 0.12 mg a.s./kg dry soil for Kraft® 36 EC; and 54 and 23 mg a.s./kg dry soil for Score® 250 EC. Technical difenoconazole did not have any effect at the concentrations tested. No significant differences in gene expression were found between the abamectin concentrations tested (EC10 and EC50) and the solvent control. Exposure to Kraft® 36 EC, however, significantly induced Cyp6 expression at the EC50 level, while VgR was significantly downregulated at both the EC10 and EC50. Exposure to the simple pesticide mixture of Kraft® 36 EC + Score® 250 EC caused significant up regulation of ABC transporter, and significant down regulation of VgR relative to the controls. GABA receptor also showed significant down-regulation between the EC10 and EC50 mixture treatments. Results of the present study demonstrate that pesticide-induced gene expression effects precede and occur at lower concentrations than organism-level responses. Integrating "omic" endpoints in traditional bioassays may thus be a promising way forward in pesticide toxicity evaluations.
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Affiliation(s)
- Livia Pitombeira de Figueirêdo
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil; Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands.
| | - Michiel A Daam
- CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, 2829-516, Caparica, Portugal
| | - Giulia Mainardi
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Janine Mariën
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Evaldo L G Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970, São Carlos, Brazil
| | - Cornelis A M van Gestel
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
| | - Dick Roelofs
- Department of Ecological Science, Faculty of Science, Vrije Universiteit, De Boelelaan 1085, 1081, HV Amsterdam, the Netherlands
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12
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Li F, Ma K, Chen X, Zhou JJ, Gao X. The regulation of three new members of the cytochrome P450 CYP6 family and their promoters in the cotton aphid Aphis gossypii by plant allelochemicals. Pest Manag Sci 2019; 75:152-159. [PMID: 29797492 DOI: 10.1002/ps.5081] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 05/17/2018] [Accepted: 05/18/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND The expression of P450 genes in insects can be induced by plant allelochemicals. To understand the induction mechanisms, we measured the expression profiles of three P450 genes and their promoter activities under the induction of plant allelochemicals. RESULTS The inducible expression of CYP6CY19 was the highest among three genes, followed by those of CYP6CY22 and CYP6DA1. The regions from -687 to +586 bp of CYP6DA1, from -666 to +140 bp of CYP6CY19 and from -530 to +218 bp of CYP6CY22 were essential for basal transcriptional activity. The cis-elements for plant allelochemicals induction were identified between -193 and +56 bp of CYP6DA1, between -157 and +140 bp of CYP6CY19 and between -108 and +218 bp of CYP6CY22. These promoter regions were found to contain a potential aryl hydrocarbon receptor element binding site with a conservative sequence motif 5'-C/TAC/ANCA/CA-3'. All these four plant allelochemicals were able to induce the expression of these P450 genes. Tannic acid had a better inductive effect than other three plant allelochemicals. CONCLUSIONS Our study identified the plant allelochemical responsive cis-elements. This provides further research targets aimed at understanding the regulatory mechanisms of P450 genes expression and their interactions with plant allelochemicals in insect pests. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Fen Li
- Department of Entomology, China Agricultural University, Beijing, P. R. China
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - Kangsheng Ma
- Department of Entomology, China Agricultural University, Beijing, P. R. China
| | - Xuewei Chen
- Department of Entomology, China Agricultural University, Beijing, P. R. China
| | - Jing-Jiang Zhou
- Department of Biointeractions and Crop Protection, Rothamsted Research, Harpenden, UK
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing, P. R. China
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13
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Elzaki MEA, Miah MA, Peng Y, Zhang H, Jiang L, Wu M, Han Z. Deltamethrin is metabolized by CYP6FU1, a cytochrome P450 associated with pyrethroid resistance, in Laodelphax striatellus. Pest Manag Sci 2018; 74:1265-1271. [PMID: 29194952 DOI: 10.1002/ps.4808] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Revised: 08/29/2017] [Accepted: 11/21/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Cytochrome P450s (CYPs) are known to play a major role in metabolizing a wide range compounds. CYP6FU1 has been found to be over-expressed in a deltamethrin-resistant strain of Laodelphax striatellus. This study was conducted to express CYP6FU1 in Sf9 cells as a recombinant protein, to confirm its ability to degrade deltamethrin, chlorpyrifos, imidacloprid and traditional P450 probing substrates. RESULTS Carbon monoxide difference spectrum analysis indicated that the intact CYP6FU1 protein was expressed in insect Sf9 cells. Catalytic activity tests with four traditional P450 probing substrates revealed that the expressed CYP6FU1 preferentially metabolized p-nitroanisole and ethoxyresorufin, but not ethoxycoumarin and luciferin-HEGE. The enzyme kinetic parameters were tested using p-nitroanisole. The michaelis constant (Km ) and catalytic constant (Kcat ) values were 17.51 ± 4.29 µm and 0.218 ± 0.001 pmol min-1 mg-1 protein, respectively. Furthermore, CYP6FU1 activity for degradation of insecticides was tested by measuring substrate depletion and metabolite formation. The chromatogram analysis showed obvious nicotinamide-adenine dinucleotide phosphate (NADPH)-dependent depletion of deltamethrin, and formation of the unknown metabolite. Mass spectra and the molecular docking model showed that the metabolite was 4-hydroxy-deltamethrin. However, the recombinant CYP6FU1 could not metabolize imidacloprid and chlorpyrifos. CONCLUSION These results confirmed that the over-expressed CYP6FU1 contributes to deltamethrin resistance in L. striatellus, and p-nitroanisole might be a potential diagnostic probe for deltamethrin metabolic resistance detection and monitoring. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Mohammed Esmail Abdalla Elzaki
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
- College of Crop Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Mohammad Asaduzzaman Miah
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Yingchuan Peng
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Haomiao Zhang
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Ling Jiang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Min Wu
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Zhaojun Han
- Department of Entomology, College of Plant Protection/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing Agricultural University, Nanjing, Jiangsu, China
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14
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Pan J, Yang C, Liu Y, Gao Q, Li M, Qiu X. Novel cytochrome P450 (CYP6D1) and voltage sensitive sodium channel (Vssc) alleles of the house fly (Musca domestica) and their roles in pyrethroid resistance. Pest Manag Sci 2018; 74:978-986. [PMID: 29155487 DOI: 10.1002/ps.4798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/05/2017] [Accepted: 11/07/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND The house fly Musca domestica is an important disease vector. Point mutation-mediated target-site insensitivity of the voltage sensitive sodium channel (VSSC) and increased detoxification mediated by cytochrome P450 (CYP6D1) overexpression have been characterized as two major mechanisms of pyrethroid resistance. In this study, genetic mutations in the Vssc and CYP6D1 genes and their contribution to pyrethroid resistance were investigated. RESULTS Twelve lines of house flies homozygous for four genotypes were established. House flies carrying the VSSC 1014F mutation and overexpressing CYP6D1 had higher resistance to pyrethroids than those carrying 1014F alone. The presence of the 15-bp insert in the promoter region of the CYP6D1 gene did not necessarily result in a significant increase in CYP6D1 mRNA and pyrethroid resistance levels. A novel Vssc allele carrying two mutations (G1924D and G2004S) in combination with the classic 1014F and a novel CYP6D1 allele that is very similar to CYP6D1v1 were identified in Chinese house flies. CONCLUSION This work demonstrates the effect of genetic mutations in CYP6D1 and Vssc on the susceptibility of house flies to pyrethroids, and verifies that 15-bp insert-containing CYP6D1 alleles have a single origin. These findings offer insights into the evolution of insecticide resistance and have implications for house fly control. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Jing Pan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chan Yang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yan Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Qi Gao
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Mei Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
| | - Xinghui Qiu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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15
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Shi Y, Wang H, Liu Z, Wu S, Yang Y, Feyereisen R, Heckel DG, Wu Y. Phylogenetic and functional characterization of ten P450 genes from the CYP6AE subfamily of Helicoverpa armigera involved in xenobiotic metabolism. Insect Biochem Mol Biol 2018; 93:79-91. [PMID: 29258871 DOI: 10.1016/j.ibmb.2017.12.006] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 12/07/2017] [Accepted: 12/12/2017] [Indexed: 06/07/2023]
Abstract
The cotton bollworm, Helicoverpa armigera, is a generalist herbivore widely distributed over the world and is a major lepidopteran pest on cotton. Studies, especially from Asia, show that it relies on cytochrome P450 monooxygenases with broad substrate specificities to protect itself from pesticides. The number of P450s may have expanded in the processes of coping with the wide diversity of phytochemicals that the insect encounters among its numerous host plants. In order to examine the metabolic capabilities of these P450s, we focused here on all ten P450s of the Helicoverpa armigera CYP6AE subfamily, which can be easily induced by plant toxins and pyrethroids. These P450s, along with cytochrome P450 reductase, were heterologously expressed in insect cells and compared functionally. In vitro metabolism showed that all CYP6AE subfamily members can convert esfenvalerate to 4'-hydroxyesfenvalerate efficiently except CYP6AE20. In contrast, none of the recombinant CYP6AE enzymes could metabolise gossypol under our experimental conditions. Epoxidation capabilities were observed in the CYP6AE subfamily, aldrin can be converted to dieldrin at rates up to 0.45 ± 0.04 pmol/min/pmol P450. Seven P450s in this subfamily can metabolise imidacloprid, but with lower efficiency than Bemisia tabaci CYP6CM1vQ. CYP6AE20 had virtually no metabolic competence to these four compounds but could metabolise several model fluorogenic substrates. These results showed the broad substrate spectrum of H. armigera CYP6AE P450s and suggest a limited role of gossypol upon the evolution of H. armigera CYP6AE genes.
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Affiliation(s)
- Yu Shi
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Huidong Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Zhi Liu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Shuwen Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yihua Yang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - René Feyereisen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej, Denmark.
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena 07745, Germany.
| | - Yidong Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
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16
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Kapantaidaki DE, Sadikoglou E, Tsakireli D, Kampanis V, Stavrakaki M, Schorn C, Ilias A, Riga M, Tsiamis G, Nauen R, Skavdis G, Vontas J, Tsagkarakou A. Insecticide resistance in Trialeurodes vaporariorum populations and novel diagnostics for kdr mutations. Pest Manag Sci 2018; 74:59-69. [PMID: 28734106 DOI: 10.1002/ps.4674] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/16/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Neonicotinoids, pyrethroids and ketoenols are currently used for the control of Trialeurodes vaporariorum (Hemiptera: Aleyrodidae). In this study, insecticide resistance status and mechanisms were investigated using classical bioassays and molecular techniques. RESULTS Dose-response bioassays were performed on 19 Greek populations, among the 35 different whitefly populations used for the whole analysis. Resistance factors scaled up to 207-, 4657- and 59-fold for imidacloprid, bifenthrin and spiromesifen, respectively. Molecular assays were used to investigate the frequency of known resistance mutations. A simple polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay was developed for detecting the pyrethroid-resistant alleles r1 (mutation L925I) and r2 (mutation T929I) of the para-type voltage-gated sodium channel gene (VGSC). Both alleles were present at high frequencies (on average 65% and 33%, respectively) in 14 populations from Greece. The M918 L pyrethroid resistance mutation was not detected in any of the Greek populations. Sequencing and a Taqman allelic discrimination were used to monitor the frequency of the mutation E645K of the acetyl-coenzyme A carboxylase gene (ACC) recently linked to spiromesifen resistance. This mutation was detected in 20 of the 24 populations examined in ∼38% frequency among the 433 individuals tested. However, its association with the spiromesifen resistance phenotype was not confirmed in the Greek populations. Finally, two homologues of the CYP6CM1 Bemisia tabaci P450, the known neonicotinoid metabolizer, were found upregulated in two T. vaporariorum neonicotinoid-resistant populations; they were both functionally expressed in Escherichia coli, but the recombinant proteins encoded did not metabolize those neonicotinoid insecticides tested. CONCLUSION The development of simple diagnostics and their use alongside classical and molecular techniques for the early detection of resistant populations are of great importance for pest management strategies. The practical implications of our results are discussed in light of whitefly control. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Despoina E Kapantaidaki
- Department of Environmental and Natural Resources Management, University of Patras, Agrinio, Greece
- Hellenic Agricultural Organisation - 'DEMETER', Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, Greece
| | - Eldem Sadikoglou
- Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - Dimitra Tsakireli
- Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology, Heraklion, Greece
| | - Vasileios Kampanis
- Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - Marianna Stavrakaki
- Hellenic Agricultural Organisation - 'DEMETER', Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, Greece
| | - Corinna Schorn
- Bayer AG, Crop Science Division, R&D Pest Control Biology, Monheim, Germany
| | - Aris Ilias
- Hellenic Agricultural Organisation - 'DEMETER', Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, Greece
| | - Maria Riga
- Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology, Heraklion, Greece
| | - George Tsiamis
- Department of Environmental and Natural Resources Management, University of Patras, Agrinio, Greece
| | - Ralf Nauen
- Bayer AG, Crop Science Division, R&D Pest Control Biology, Monheim, Germany
| | - George Skavdis
- Department of Molecular Biology and Genetics, Democritus University of Thrace, Alexandroupolis, Greece
| | - John Vontas
- Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology, Heraklion, Greece
- Laboratory of Pesticide Science, Department of Crop Science, Agricultural University of Athens, Greece
| | - Anastasia Tsagkarakou
- Hellenic Agricultural Organisation - 'DEMETER', Institute of Olive Tree, Subtropical Crops and Viticulture, Heraklion, Greece
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17
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Tang G, Yao J, Li D, He Y, Zhu YC, Zhang X, Zhu KY. Cytochrome P450 genes from the aquatic midge Chironomus tentans: Atrazine-induced up-regulation of CtCYP6EX3 enhanced the toxicity of chlorpyrifos. Chemosphere 2017; 186:68-77. [PMID: 28768160 DOI: 10.1016/j.chemosphere.2017.07.137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/25/2017] [Accepted: 07/26/2017] [Indexed: 06/07/2023]
Abstract
The open reading frames of 19 cytochrome P450 monooxygenase (CYP) genes were sequenced from Chironomus tentans, a commonly used freshwater invertebrate model. Phylogenetic analysis of the 19 CYPs along with a previously reported CYP (CtCYP4G33) revealed that they belong to three different clans, including 3 in CYP4, 15 in CYP3, and 2 in mitochondria clan. When third-instar larvae were exposed to atrazine at 5000 μg/L, the transcription of CtCYP6EX3, CtCYP6EV3, CtCYP9AT1 and CtCYPEX1 was significantly up-regulated. To examine whether CtCYP6EX3 played a role in oxidative activation of chlorpyrifos to chlorpyrifos-oxon, we evaluated larval susceptibility to chlorpyrifos after CtCYP6EX3 transcript was suppressed by RNAi. The larvae fed chitosan/dsCtCYP6EX3 nanoparticles showed a significantly decreased CtCYP6EX3 transcript (53.1%) as compared with the control larvae fed chitosan/dsGFP nanoparticles. When the CtCYP6EX3-silenced larvae were exposed to chlorpyrifos at 6 μg/L or its binary mixture with atrazine (chlorpyrifos at 3 μg/L and atrazine at 1000 μg/L), the larvae became less susceptible to the pesticides as their mortalities decreased by 24.1% and 20.5%, respectively. These results along with our previous findings suggested that the increased toxicity of chlorpyrifos was likely due to an enhanced oxidative process from chlorpyrifos to chlorpyrifos-oxon by CtCYP6EX3 as RNAi of CtCYP6EX3 led to decreased susceptibility of C. tentans larvae to chlorpyrifos alone and the binary mixture of atrazine and chlorpyrifos. However, further study would be necessary to validate our results by functional assays using heterologously expressed CtCYP6EX3 enzyme.
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Affiliation(s)
- Guanghui Tang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China; Department of Entomology, Kansas State University, Manhattan, KS 66502, USA
| | - Jianxiu Yao
- Department of Entomology, Kansas State University, Manhattan, KS 66502, USA; USDA-ARS, Southern Insect Management Unit, Stoneville, MS 38776, USA
| | - Daqi Li
- Department of Entomology, Kansas State University, Manhattan, KS 66502, USA; Institute of Applied Biology, Shanxi University, Taiyuan, Shaanxi 030006, China
| | - Yanping He
- Department of Entomology, Kansas State University, Manhattan, KS 66502, USA; College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Yu-Cheng Zhu
- USDA-ARS, Southern Insect Management Unit, Stoneville, MS 38776, USA
| | - Xin Zhang
- Department of Entomology, Kansas State University, Manhattan, KS 66502, USA
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS 66502, USA.
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18
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Peng T, Chen X, Pan Y, Zheng Z, Wei X, Xi J, Zhang J, Gao X, Shang Q. Transcription factor aryl hydrocarbon receptor/aryl hydrocarbon receptor nuclear translocator is involved in regulation of the xenobiotic tolerance-related cytochrome P450 CYP6DA2 in Aphis gossypii Glover. Insect Mol Biol 2017; 26:485-495. [PMID: 28463435 DOI: 10.1111/imb.12311] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The cotton aphid, Aphis gossypii, is one of the most economically important agricultural pests worldwide as it is polyphagous and resistant to many classes of insecticides. Overexpression of the cytochrome P450 monooxygenase (P450) CYP6DA2 has previously been found to be associated with gossypol and spirotetramat tolerance in the cotton aphid. In the present study, the elements located in the promoter region (-357:-343; -250:-241; -113:-104) of CYP6DA2 were shown to control promoter activity, and gossypol induction was observed. We hypothesized that the expression of CYP6DA2 is subject to transcriptional regulation. To investigate the underlying mechanism, we assessed two transcription factors, aryl hydrocarbon receptor (AhR) and aryl hydrocarbon receptor nuclear translocator (ARNT), and found that the abundance of AhR was highly correlated with CYP6DA2 abundance. RNA interference of AhR or ARNT significantly decreased the levels of the target gene as well as those of its counterpart, and both dramatically repressed CYP6DA2 expression. Cotransfection of the ARNT, AhR, or AhR plus ARNT and CYP6DA2 promoter constructs elevated CYP6DA2 promoter activity, with the AhR plus ARNT cotransfection being the most effective. Thus, these elements located in the promoter were responsible for CYP6DA2 transcription, and CYP6DA2 expression was regulated by the transcription factors AhR and ARNT.
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Affiliation(s)
- T Peng
- College of Plant Science, Jilin University, Changchun, China
| | - X Chen
- Department of Entomology, China Agricultural University, Beijing, China
| | - Y Pan
- College of Plant Science, Jilin University, Changchun, China
| | - Z Zheng
- College of Plant Science, Jilin University, Changchun, China
| | - X Wei
- College of Plant Science, Jilin University, Changchun, China
| | - J Xi
- College of Plant Science, Jilin University, Changchun, China
| | - J Zhang
- College of Plant Science, Jilin University, Changchun, China
| | - X Gao
- Department of Entomology, China Agricultural University, Beijing, China
| | - Q Shang
- College of Plant Science, Jilin University, Changchun, China
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19
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Wang R, Zhu Y, Deng L, Zhang H, Wang Q, Yin M, Song P, Elzaki MEA, Han Z, Wu M. Imidacloprid is hydroxylated by Laodelphax striatellus CYP6AY3v2. Insect Mol Biol 2017; 26:543-551. [PMID: 28654199 DOI: 10.1111/imb.12317] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Laodelphax striatellus (Fallén) is one of the most destructive pests of rice, and has developed high resistance to imidacloprid. Our previous work indicated a strong association between imidacloprid resistance and the overexpression of a cytochrome P450 gene CYP6AY3v2 in a L. striatellus imidacloprid resistant strain (Imid-R). In this study, a transgenic Drosophila melanogaster line that overexpressed the L. striatellus CYP6AY3v2 gene was established and was found to confer increased levels of imidacloprid resistance. Furthermore, CYP6AY3v2 was co-expressed with D. melanogaster cytochrome P450 reductase (CPR) in Spodoptera frugiperda 9 (SF9) cells. A carbon monoxide difference spectra analysis indicated that CYP6AY3v2 was expressed predominately in its cytochrome P450 (P450) form, which is indicative of a good-quality functional enzyme. The recombinant CYP6AY3v2 protein efficiently catalysed the model substrate P-nitroanisole to p-nitrophenol with a maximum velocity (Vmax ) of 60.78 ± 3.93 optical density (mOD)/min/mg protein. In addition, imidacloprid itself was metabolized by the recombinant CYP6AY3v2/nicotinamide adenine dinucleotide 2'-phosphate reduced tetrasodium salt (NADPH) CPR microsomes in in vitro assays (catalytic constant (Kcat ) = 0.34 pmol/min/pmol P450, michaelis constant (Km ) = 41.98 μM), and imidacloprid depletion and metabolite peak formation were with a time dependence. The data provided direct evidence that CYP6AY3v2 is capable of hydroxylation of imidacloprid and conferring metabolic resistance in L. striatellus.
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Affiliation(s)
- R Wang
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - Y Zhu
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - L Deng
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - H Zhang
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - Q Wang
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - M Yin
- Jiangsu Center for Research & Development of Medicinal Plants, Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing, Jiangsu, China
| | - P Song
- Jiangsu Center for Research & Development of Medicinal Plants, Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing, Jiangsu, China
| | - M E A Elzaki
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - Z Han
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
| | - M Wu
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Jiangsu/Key Laboratory of Monitoring and Management of Plant Diseases and Insects, Ministry of Agriculture, Nanjing, Jiangsu, China
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20
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Tian K, Liu D, Yuan Y, Li M, Qiu X. CYP6B6 is involved in esfenvalerate detoxification in the polyphagous lepidopteran pest, Helicoverpa armigera. Pestic Biochem Physiol 2017; 138:51-56. [PMID: 28456304 DOI: 10.1016/j.pestbp.2017.02.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/18/2017] [Accepted: 02/25/2017] [Indexed: 06/07/2023]
Abstract
The cotton bollworm, Helicoverpa armigera, is a polyphagous pest that has a strong capacity to evolve resistance against various classes of insecticides. Cytochrome P450 enzymes have been suspected involved in pyrethroid metabolism and resistance in this pest. However, how many and which P450s are involved in pyrethroid metabolism is largely unknown. In this study, CYP6B6 and NADPH-cytochrome P450 reductase (HaCPR) from H. armigera were successfully co-expressed in Escherichia coli. Incubation of esfenvalerate with the recombinant CYP6B6-HaCPR monooxygenase complex revealed that CYP6B6 was able to transform esfenvalerate into 4'-hydroxy fenvalerate. Kcat and Km values for the formation of 4'-hydroxyfenvalerate by the E. coli-produced CYP6B6 were determined to be 1.65±0.11min-1 and 4.10±0.84μM respectively. Our results demonstrate that CYP6B6 has the ability to hydroxylate esfenvalerate, thus plays a role in fenvalerate detoxification.
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Affiliation(s)
- Kai Tian
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dong Liu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiyang Yuan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Mei Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Xinghui Qiu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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21
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Guo Y, Wu H, Zhang X, Ma E, Guo Y, Zhu KY, Zhang J. RNA interference of cytochrome P450 CYP6F subfamily genes affects susceptibility to different insecticides in Locusta migratoria. Pest Manag Sci 2016; 72:2154-2165. [PMID: 26853074 DOI: 10.1002/ps.4248] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 01/11/2016] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
BACKGROUND Many insect cytochrome P450s (CYPs) play critical roles in detoxification of insecticides. The CYP6 family is unique to the class Insecta, and its biochemical function has essentially been associated with the metabolism of xenobiotics. In this study, we sequenced and characterised the full-length cDNAs of five CYP genes from Locusta migratoria, a highly destructive agricultural pest worldwide. RESULTS The five genes were predominantly expressed in brain, guts, fat bodies or Malpighian tubules. CYP6FE1, CYP6FF1 and CYP6FG1 were expressed at higher levels in fourth-instar nymphs than in other developmental stages. CYPFD2 is specifically expressed in adults, whereas CYP6FD1, CYP6FD2 and CYP6FE1 showed significantly lower expression in eggs than in other developmental stages. Deltamethrin suppressed CYP6FD1 expression in third-instar nymphs and upregulated the expression level of CYP6FD2, CYP6FF1 and CYP6FG1 at the dose of LD10 . Efficient RNA interference-mediated gene silencing was established for four of the five CYP genes. Silencing of CYP6FF1 increased the nymphal mortality from 23 to 50% in response to deltamethrin. Silencing of CYP6FD2 and CYP6FE1 increased the nymphal mortality from 32 to 72 and 66%, respectively, to carbaryl. CONCLUSION Three of the four CYP6F subfamily genes in L. migratoria were associated with the detoxification of deltamethrin or carbaryl. The role of CYPs in insecticide detoxification appears to be both gene and insecticide specific. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Yanqiong Guo
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China
- College of Agriculture, Shanxi Agricultural University, Taigu, Shanxi, China
| | - Haihua Wu
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China
| | - Xueyao Zhang
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China
| | - Enbo Ma
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China
| | - Yaping Guo
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China
| | - Kun Yan Zhu
- Department of Entomology, Kansas State University, Manhattan, KS, USA.
| | - Jianzhen Zhang
- Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi, China.
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22
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Krempl C, Heidel-Fischer HM, Jiménez-Alemán GH, Reichelt M, Menezes RC, Boland W, Vogel H, Heckel DG, Joußen N. Gossypol toxicity and detoxification in Helicoverpa armigera and Heliothis virescens. Insect Biochem Mol Biol 2016; 78:69-77. [PMID: 27687846 DOI: 10.1016/j.ibmb.2016.09.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 09/03/2016] [Accepted: 09/23/2016] [Indexed: 05/27/2023]
Abstract
Gossypol is a polyphenolic secondary metabolite produced by cotton plants, which is toxic to many organisms. Gossypol's aldehyde groups are especially reactive, forming Schiff bases with amino acids of proteins and cross-linking them, inhibiting enzyme activities and contributing to toxicity. Very little is known about gossypol's mode of action and its detoxification in cotton-feeding insects that can tolerate certain concentrations of this compound. Here, we tested the toxicity of gossypol and a gossypol derivative lacking free aldehyde groups (SB-gossypol) toward Helicoverpa armigera and Heliothis virescens, two important pests on cotton plants. Larval feeding studies with these two species on artificial diet supplemented with gossypol or SB-gossypol revealed no detectable toxicity of gossypol, when the aldehyde groups were absent. A cytochrome P450 enzyme, CYP6AE14, is upregulated in H. armigera feeding on gossypol, and has been claimed to directly detoxify gossypol. However, using in vitro assays with heterologously expressed CYP6AE14, no metabolites of gossypol were detected, and further studies suggest that gossypol is not a direct substrate of CYP6AE14. Furthermore, larvae feeding on many other plant toxins also upregulate CYP6AE14. Our data demonstrate that the aldehyde groups are critical for the toxicity of gossypol when ingested by H. armigera and H. virescens larvae, and suggest that CYP6AE14 is not directly involved in gossypol metabolism, but may play a role in the general stress response of H. armigera larvae toward plant toxins.
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Affiliation(s)
- Corinna Krempl
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Hanna M Heidel-Fischer
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Guillermo Hugo Jiménez-Alemán
- Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Michael Reichelt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Riya Christina Menezes
- Research Group Mass Spectrometry/Proteomics, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Wilhelm Boland
- Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Heiko Vogel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - David G Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
| | - Nicole Joußen
- Department of Entomology, Max Planck Institute for Chemical Ecology, Hans-Knoell-Str. 8, 07745 Jena, Germany.
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23
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Peng T, Pan Y, Gao X, Xi J, Zhang L, Ma K, Wu Y, Zhang J, Shang Q. Reduced abundance of the CYP6CY3-targeting let-7 and miR-100 miRNAs accounts for host adaptation of Myzus persicae nicotianae. Insect Biochem Mol Biol 2016; 75:89-97. [PMID: 27318250 DOI: 10.1016/j.ibmb.2016.06.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/06/2016] [Accepted: 06/09/2016] [Indexed: 06/06/2023]
Abstract
Nicotine is one of the most abundant and toxic secondary plant metabolites in nature and is defined by high toxicity to plant-feeding insects. Studies suggest that increased expression of cytochrome P450 (CYP6CY3) and the homologous CYP6CY4 genes in Myzus persicae nicotianae is correlated with tolerance to nicotine. Indeed, through expression analyses of the CYP6CY3 and CYP6CY4 genes of different M. persicae subspecies, we determined that the mRNA levels of these two genes were much higher in M. persicae nicotianae than in M. persicae sensu stricto. We hypothesized that the expression of these two genes is subject to post-transcriptional regulation. To investigate the underlying mechanism, the miRNA profile of M. persicae nicotianae was sequenced, and twenty-two miRNAs were predicted to target CYP6CY3. Validation of these miRNAs identified two miRNAs, let-7 and miR-100, whose abundance was highly inversely correlated with the abundance of the CYP6CY3 gene. This result implies that the let-7 and miR-100 miRNAs play a major role in the post-transcriptional regulation of the CYP6CY3 gene. Modulation of the abundance of let-7 and miR-100 through the addition of inhibitors/mimics of let-7 or miR-100 to artificial diet significantly altered the tolerance of M. persicae nicotianae to nicotine, further confirming the regulatory role of these two miRNAs. Interestingly, after decreasing the transcript levels of CYP6CY3 by modulating regulatory miRNAs, the transcript levels of the homologous isozyme CYP6CY4 were significantly elevated, suggesting a compensatory mechanism between the CYP6CY3 gene and its homologous CYP6CY4 gene. Our findings provide insight into the molecular drivers of insect host shifts and reveal an important source of genetic variation for adaptive evolution in insect species.
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Affiliation(s)
- Tianfei Peng
- College of Plant Science, Jilin University, Changchun, 130062, PR China
| | - Yiou Pan
- College of Plant Science, Jilin University, Changchun, 130062, PR China
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Jinghui Xi
- College of Plant Science, Jilin University, Changchun, 130062, PR China
| | - Lei Zhang
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Kangsheng Ma
- Department of Entomology, China Agricultural University, Beijing, 100193, PR China
| | - Yongqiang Wu
- College of Plant Science, Jilin University, Changchun, 130062, PR China
| | - Juhong Zhang
- College of Plant Science, Jilin University, Changchun, 130062, PR China
| | - Qingli Shang
- College of Plant Science, Jilin University, Changchun, 130062, PR China.
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24
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Zhao J, Liu XN, Li F, Zhuang SZ, Huang LN, Ma J, Gao XW. Yeast one-hybrid screening the potential regulator of CYP6B6 overexpression of Helicoverpa armigera under 2-tridecanone stress. Bull Entomol Res 2016; 106:182-190. [PMID: 26696496 DOI: 10.1017/s0007485315000942] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In insect, the cytochrome P450 plays a pivotal role in detoxification to toxic allelochemicals. Helicoverpa armigera can tolerate and survive in 2-tridecanone treatment owing to the CYP6B6 responsive expression, which is controlled by some regulatory DNA sequences and transcription regulators. Therefore, the 2-tridecanone responsive region and transcription regulators of the CYP6B6 are responsible for detoxification of cotton bollworm. In this study, we used yeast one-hybrid to screen two potential transcription regulators of the CYP6B6 from H. armigera that respond to the plant secondary toxicant 2-tridecanone, which were named Prey1 and Prey2, respectively. According to the NCBI database blast, Prey1 is the homology with FK506 binding protein (FKBP) of Manduca sexta and Bombyx mori that belongs to the FKBP-C superfamily, while Prey2 may be a homology of an unknown protein of Papilio or the fcaL24 protein homology of B. mori. The electrophoretic mobility shift assays revealed that the FKBP of prokaryotic expression could specifically bind to the active region of the CYP6B6 promoter. After the 6th instar larvae of H. armigera reared on 2-tridecanone artificial diet, we found there were similar patterns of CYP6B6 and FKBP expression of the cotton bollworm treated with 10 mg g-1 2-tridecanone for 48 h, which correlation coefficient was the highest (0.923). Thus, the FKBP is identified as a strong candidate for regulation of the CYP6B6 expression, when the cotton bollworm is treated with 2-tridecanone. This may lead us to a better understanding of transcriptional mechanism of CYP6B6 and provide very useful information for the pest control.
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Affiliation(s)
- J Zhao
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - X N Liu
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - F Li
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - S Z Zhuang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - L N Huang
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - J Ma
- Xinjiang Key Laboratory of Biological Resources and Genetic Engineering,College of Life Science and Technology,Xinjiang University,Urumqi,Xinjiang,China
| | - X W Gao
- College of Agronomy and Bio-technology,China Agricultural University,Beijing,China
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