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Miyashita R, Ugajin A, Oda H, Ozaki K. Identification and in vivo functional analysis of furanocoumarin-responsive cytochrome P450s in a Rutaceae-feeding Papilio butterfly. J Exp Biol 2024; 227:jeb247791. [PMID: 39054940 DOI: 10.1242/jeb.247791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 07/19/2024] [Indexed: 07/27/2024]
Abstract
The Order Lepidoptera contains nearly 160,000 described species and most of them are specialist herbivores that use restricted plant species as hosts. Speciation that originated from host shift is one of the important factors for the diversification of Lepidoptera. Because plants prepare secondary metabolites for defense against herbivores, with varying profiles of the components among different plant taxa, the specialist herbivores need to be adapted to the toxic substances unique to their host plants. Swallowtail butterflies of the genus Papilio consist of over 200 species. Approximately 80% of them utilize Rutaceae plants, and among the remaining species, a specific subgroup uses phylogenetically distant Apiaceae plants as larval hosts. Rutaceae and Apiaceae commonly contain toxic secondary metabolites, furanocoumarins, and molecular phylogenetic studies support the concept that Apiaceae feeders were derived from Rutaceae feeders. Molecular mechanisms underlying furanocoumarin tolerance in Papilio butterflies have been investigated almost exclusively in an Apiaceae feeder by an in vitro assay. In contrast, there is little information regarding the Rutaceae feeders. Here, we focused on a Rutaceae feeder, Papilio xuthus, and identified two furanocoumarin-responsive cytochrome P450-6B (CYP6B) genes, of which one was an ortholog of a furanocoumarin-metabolizing enzyme identified in the Apiaceae-feeding Papilio while the other was previously unreported. We further conducted in vivo functional analysis using the CRISPR/Cas9 system, revealing a contribution of these CYP6Bs to furanocoumarin tolerance of P. xuthus larvae. Our findings suggest that co-option of furanocoumarin-metabolizing CYP6B enzymes at least partially contributed to the host shift from Rutaceae to Apiaceae in Papilio butterflies.
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Affiliation(s)
- Rei Miyashita
- JT Biohistory Research Hall, 1-1 Murasaki-cho, Takatsuki, Osaka, 569-1125, Japan
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Atsushi Ugajin
- JT Biohistory Research Hall, 1-1 Murasaki-cho, Takatsuki, Osaka, 569-1125, Japan
| | - Hiroki Oda
- JT Biohistory Research Hall, 1-1 Murasaki-cho, Takatsuki, Osaka, 569-1125, Japan
- Department of Biological Sciences, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka, 560-0043, Japan
| | - Katsuhisa Ozaki
- JT Biohistory Research Hall, 1-1 Murasaki-cho, Takatsuki, Osaka, 569-1125, Japan
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Wang Z, He W, Fu L, Cheng H, Lin C, Dong X, Liu C. Detoxification and neurotransmitter clearance drive the recovery of Arma chinensis from β-cypermethrin-triggered knockdown. JOURNAL OF HAZARDOUS MATERIALS 2024; 476:135175. [PMID: 39002489 DOI: 10.1016/j.jhazmat.2024.135175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 06/29/2024] [Accepted: 07/09/2024] [Indexed: 07/15/2024]
Abstract
Natural enemies of arthropods contribute considerably to agriculture by suppressing pests, particularly when combined with chemical control. Studies show that insect recovery after insecticide application is rare. Here, we discovered the recovery of the predatory bug Arma chinensis from knockdown following the application of β-cypermethrin but not five other insecticides. A. chinensis individuals were more tolerant to β-cypermethrin than lepidopteran and coleopteran larvae, which did not recover from knockdown. We assessed A. chinensis recovery by monitoring their respiration and tracking locomotion through the entire process. We identified and verified the trans-regulation of detoxifying genes, including those encoding cytochrome P450s and α/β-hydrolase, which confer recovery from β-cypermethrin exposure in A. chinensis, by mitogen-activated protein kinase (MAPK) and cAMP response element binding protein (CREB). Furthermore, we discovered a novel mechanism, the neurotransmitter clearance, in vivo during the recovery process, by which the insect initiated the removal of excessive dopamine with a degrading enzyme ebony. Overall, these results provide mechanistic insights into the detoxification and neurotransmitter clearance that jointly drive insect recovery from insecticide exposure.
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Affiliation(s)
- Zhen Wang
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wenjie He
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Luyao Fu
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Hongmei Cheng
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Changjin Lin
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiaolin Dong
- Department of Entomology, Yangtze University, Jingzhou 434023, China
| | - Chenxi Liu
- Sino-American Biological Control Laboratory, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Fu C, Yang D, Long WC, Xiao X, Wang H, Jiang N, Yang Y. Genome-wide identification, molecular evolution and gene expression of P450 gene family in Cyrtotrachelus buqueti. BMC Genomics 2024; 25:453. [PMID: 38720243 PMCID: PMC11080265 DOI: 10.1186/s12864-024-10372-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 05/02/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Insect Cytochrome P450 monooxygenase (CYPs or P450s) plays an important role in detoxifying insecticides, causing insect populations to develop resistance. However, the molecular functions of P450 gene family in Cyrtotrachelus buqueti genome are still lacking. RESULTS In this study, 71 CbuP450 genes have been identified. The amino acids length of CbuP450 proteins was between 183 aa ~ 1041 aa. They are proteins with transmembrane domains. The main component of their secondary structure is α-helix and random coils. Phylogenetic analysis showed that C. buqueti and Rhynchophorus ferrugineus were the most closely related. This gene family has 29 high-frequency codons, which tend to use A/T bases and A/T ending codons. Gene expression analysis showed that CbuP450_23 in the female adult may play an important role on high temperature resistance, and CbuP450_17 in the larval may play an important role on low temperature tolerance. CbuP450_10, CbuP450_17, CbuP450_23, CbuP450_10, CbuP450_16, CbuP450_20, CbuP450_23 and CbuP450_ 29 may be related to the regulation of bamboo fiber degradation genes in C. buqueti. Protein interaction analysis indicates that most CbuP450 proteins are mainly divided into three aspects: encoding the biosynthesis of ecdysteroids, participating in the decomposition of synthetic insecticides, metabolizing insect hormones, and participating in the detoxification of compounds. CONCLUSIONS We systematically analyzed the gene and protein characteristics, gene expression, and protein interactions of CbuP450 gene family, revealing the key genes involved in the stress response of CbuP450 gene family in the resistance of C. buqueti to high or low temperature stress, and identified the key CbuP450 proteins involved in important life activity metabolism. These results provided a reference for further research on the function of P450 gene family in C. buqueti.
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Affiliation(s)
- Chun Fu
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China.
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China.
| | - Ding Yang
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
| | - Wen Cong Long
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
| | - XiMeng Xiao
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
| | - HanYu Wang
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
| | - Na Jiang
- College of Tourism and Geographical Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China
| | - YaoJun Yang
- Key Laboratory of Sichuan Province for Bamboo Pests Control and Resource Development, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China.
- College of Life Science, Leshan Normal University, No. 778 Binhe Road, Shizhong District, Leshan, 614000, Sichuan, China.
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Nakano M, Sakamoto T, Kitano Y, Bono H, Simpson RJ, Tabunoki H. An extract from the frass of swallowtail butterfly (Papilio machaon) larvae inhibits HCT116 colon cancer cell proliferation but not other cancer cell types. BMC Genomics 2023; 24:735. [PMID: 38049715 PMCID: PMC10696813 DOI: 10.1186/s12864-023-09841-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 11/24/2023] [Indexed: 12/06/2023] Open
Abstract
BACKGROUND The frass of several herbivorous insect species has been utilised as natural medicines in Asia; however, the metabolite makeup and pharmaceutical activities of insect frass have yet to be investigated. Oligophagous Papilionidae insects utilise specific kinds of plants, and it has been suggested that the biochemicals from the plants may be metabolised by cytochrome P450 (CYP) in Papilionidae insects. In this study, we extracted the components of the frass of Papilio machaon larvae reared on Angelica keiskei, Oenanthe javanica or Foeniculum vulgare and examined the biological activity of each component. Then, we explored the expression of CYP genes in the midgut of P. machaon larvae and predicted the characteristics of their metabolic system. RESULTS The components that were extracted using hexane, chloroform or methanol were biochemically different between larval frass and the host plants on which the larvae had fed. Furthermore, a fraction obtained from the chloroform extract from frass of A. keiskei-fed larvae specifically inhibited the cell proliferation of the human colon cancer cell line HCT116, whereas fractions obtained from the chloroform extracts of O. javanica- or F. vulgare-fed larval frass did not affect HCT116 cell viability. The metabolites from the chloroform extract from frass of A. keiskei-fed larvae prevented cell proliferation and induced apoptosis in HCT116 cells. Next, we explored the metabolic enzyme candidates in A. keiskei-fed larvae by RNA-seq analysis. We found that the A. keiskei-fed larval midgut might have different characteristics from the O. javanica- or F. vulgare-fed larval metabolic systems, and we found that the CYP6B2 transcript was highly expressed in the A. keiskei-fed larval midgut. CONCLUSIONS These findings indicate that P. machaon metabolites might be useful as pharmaceutical agents against human colon cancer subtypes. Importantly, our findings show that it might be possible to use insect metabolic enzymes for the chemical structural conversion of plant-derived compounds with complex structures.
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Affiliation(s)
- Miho Nakano
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, Tokyo, Fuchu, 183-8509, Japan
| | - Takuma Sakamoto
- Department of Science of Biological Production, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Yoshikazu Kitano
- Department of Applied Biological Science, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai- cho, Fuchu-shi, Tokyo, 183-8509, Japan
| | - Hidemasa Bono
- Laboratory of Bio-DX, Genome Editing Innovation Center, Hiroshima University, 3-10-23 Kagamiyama, Higashi-Hiroshima City, 739-0046, Japan
- Laboratory of Genome Informatics, Graduate School of Integrated Sciences for Life, Hiroshima University, 3- 10-23 Kagamiyama, Higashi-Hiroshima City, 739-0046, Japan
| | - Richard J Simpson
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science (LIMS), School of Agriculture, Biomedicine and Environment, La Trobe University, Melbourne, VIC, 3086, Australia
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan
| | - Hiroko Tabunoki
- Cooperative Major in Advanced Health Science, Graduate School of Bio-Applications and System Engineering, Tokyo University of Agriculture and Technology, Tokyo, Fuchu, 183-8509, Japan.
- Department of Science of Biological Production, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Tokyo, Japan.
- Institute of Global Innovation Research, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo, 183-8509, Japan.
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Quicke DLJ, Ghafouri Moghaddam M, Butcher BA. Dietary Challenges for Parasitoid Wasps (Hymenoptera: Ichneumonoidea); Coping with Toxic Hosts, or Not? Toxins (Basel) 2023; 15:424. [PMID: 37505693 PMCID: PMC10467097 DOI: 10.3390/toxins15070424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/17/2023] [Accepted: 06/23/2023] [Indexed: 07/29/2023] Open
Abstract
Many insects defend themselves against predation by being distasteful or toxic. The chemicals involved may be sequestered from their diet or synthesized de novo in the insects' body tissues. Parasitoid wasps are a diverse group of insects that play a critical role in regulating their host insect populations such as lepidopteran caterpillars. The successful parasitization of caterpillars by parasitoid wasps is contingent upon their aptitude for locating and selecting suitable hosts, thereby determining their efficacy in parasitism. However, some hosts can be toxic to parasitoid wasps, which can pose challenges to their survival and reproduction. Caterpillars employ a varied array of defensive mechanisms to safeguard themselves against natural predators, particularly parasitoid wasps. These defenses are deployed pre-emptively, concurrently, or subsequently during encounters with such natural enemies. Caterpillars utilize a range of strategies to evade detection or deter and evade attackers. These tactics encompass both measures to prevent being noticed and mechanisms aimed at repelling or eluding potential threats. Post-attack strategies aim to eliminate or incapacitate the eggs or larvae of parasitoids. In this review, we investigate the dietary challenges faced by parasitoid wasps when encountering toxic hosts. We first summarize the known mechanisms through which insect hosts can be toxic to parasitoids and which protect caterpillars from parasitization. We then discuss the dietary adaptations and physiological mechanisms that parasitoid wasps have evolved to overcome these challenges, such as changes in feeding behavior, detoxification enzymes, and immune responses. We present new analyses of all published parasitoid-host records for the Ichneumonoidea that attack Lepidoptera caterpillars and show that classically toxic host groups are indeed hosts to significantly fewer species of parasitoid than most other lepidopteran groups.
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Affiliation(s)
| | | | - Buntika A. Butcher
- Integrative Ecology Laboratory, Department of Biology, Faculty of Science, Chulalongkorn University, Phayathai Road, Bangkok 10330, Thailand; (D.L.J.Q.); (M.G.M.)
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Milyaeva PA, Nefedova LN. Boric Acid Resistance in Drosophila melanogaster Depends on the Expression Level of the Cyp9b2 Gene. RUSS J GENET+ 2022. [DOI: 10.1134/s1022795422040093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Huang K, Liu Y, Perrimon N. Roles of Insect Oenocytes in Physiology and Their Relevance to Human Metabolic Diseases. FRONTIERS IN INSECT SCIENCE 2022; 2:859847. [PMID: 38468774 PMCID: PMC10926422 DOI: 10.3389/finsc.2022.859847] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 02/14/2022] [Indexed: 03/13/2024]
Abstract
Oenocytes are large secretory cells present in the abdomen of insects known to synthesize very-long-chain fatty acids to produce hydrocarbons and pheromones that mediate courtship behavior in adult flies. In recent years, oenocytes have been implicated in the regulation of energy metabolism. These hepatocyte-like cells accumulate lipid droplets under starvation and can non-autonomously regulate tracheal waterproofing and adipocyte lipid composition. Here, we summarize evidence, mostly from Drosophila, establishing that oenocytes perform liver-like functions. We also compare the functional differences in oenocytes and the fat body, another lipid storage tissue which also performs liver-like functions. Lastly, we examine signaling pathways that regulate oenocyte metabolism derived from other metabolic tissues, as well as oenocyte-derived signals that regulate energy homeostasis.
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Affiliation(s)
- Kerui Huang
- Department of Genetics, Harvard Medical School, Blavatnik Institute, Boston, MA, United States
| | - Ying Liu
- Department of Genetics, Harvard Medical School, Blavatnik Institute, Boston, MA, United States
| | - Norbert Perrimon
- Department of Genetics, Harvard Medical School, Blavatnik Institute, Boston, MA, United States
- Harvard Medical School, Howard Hughes Medical Institute, Boston, MA, United States
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Amezian D, Nauen R, Le Goff G. Comparative analysis of the detoxification gene inventory of four major Spodoptera pest species in response to xenobiotics. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2021; 138:103646. [PMID: 34469782 DOI: 10.1016/j.ibmb.2021.103646] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 08/09/2021] [Accepted: 08/25/2021] [Indexed: 05/21/2023]
Abstract
The genus Spodoptera (Lepidoptera: Noctuidae) comprises some of the most polyphagous and destructive agricultural pests worldwide. The success of many species of this genus is due to their striking abilities to adapt to a broad range of host plants. Superfamilies of detoxification genes play a crucial role in the adaption to overcome plant defense mechanisms mediated by numerous secondary metabolites and toxins. Over the past decade, a substantial amount of expression data in Spodoptera larvae was produced for those genes in response to xenobiotics such as plant secondary metabolites, but also insecticide exposure. However, this information is scattered throughout the literature and in most cases does not allow to clearly identify candidate genes involved in host-plant adaptation and insecticide resistance. In the present review, we analyzed and compiled information on close to 600 pairs of inducers (xenobiotics) and induced genes from four main Spodoptera species: S. exigua, S. frugiperda, S. littoralis and S. litura. The cytochrome P450 monooxygenases (P450s; encoded by CYP genes) were the most upregulated detoxification genes across the literature for all four species. Most of the data was provided from studies on S. litura, followed by S. exigua, S. frugiperda and S. littoralis. We examined whether these detoxification genes were reported for larval survival under xenobiotic challenge in forward and reverse genetic studies. We further analyzed whether biochemical assays were carried out showing the ability of corresponding enzymes and transporters to breakdown and excrete xenobiotics, respectively. This revealed a clear disparity between species and the lack of genetic and biochemical information in S. frugiperda. Finally, we discussed the biological importance of detoxification genes for this genus and propose a workflow to study the involvement of these enzymes in an ecological and agricultural context.
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Affiliation(s)
- Dries Amezian
- Université Côte d'Azur, INRAE, CNRS, ISA, F-06903, Sophia Antipolis, France
| | - Ralf Nauen
- Bayer AG, Crop Science Division, R&D, Alfred Nobel-Strasse 50, 40789, Monheim, Germany.
| | - Gaëlle Le Goff
- Université Côte d'Azur, INRAE, CNRS, ISA, F-06903, Sophia Antipolis, France.
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Shi Y, Jiang Q, Yang Y, Feyereisen R, Wu Y. Pyrethroid metabolism by eleven Helicoverpa armigera P450s from the CYP6B and CYP9A subfamilies. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2021; 135:103597. [PMID: 34089822 DOI: 10.1016/j.ibmb.2021.103597] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/25/2021] [Accepted: 05/25/2021] [Indexed: 05/21/2023]
Abstract
Lepidopteran P450s of the CYP6B and CYP9A subfamilies are thought to play important roles in host plant adaptation and insecticide resistance. An increasing number of paralogs and orthologs with high levels of sequence identity have been found in these subfamilies by mining recent genome projects. However, the biochemical function of most of them remains unknown. A better understanding of the evolution of P450 genes and of the catalytic competence of the enzymes they encode is needed to facilitate studies of host plant use and insecticide resistance. Here, we focused on the full complement of CYP6B (4 genes) and CYP9A (7 genes) in the generalist herbivore, Helicoverpa armigera. These P450s were heterologously expressed in Sf9 cells and compared functionally. In vitro assays showed that all CYP6B and CYP9A P450s can metabolize esfenvalerate efficiently, except for the evolutionarily divergent CYP6B43. A new 2'-hydroxy-metabolite of esfenvalerate was identified and found to be the main metabolite produced by CYP9A12. All tested P450s showed only low induction responses to esfenvalerate. To put these results from H. armigera P450s in perspective, 158 complete CYP6B and 100 complete CYP9A genes from 34 ditrysian species were manually curated. The CYP9A subfamily was more widespread than the CYP6B subfamily and the latter showed dramatic gains and losses, with ten species lacking CYP6B genes. Two adjacent CYP6B loci were found on chromosome 21, with different fates during the evolution of Lepidoptera. The diversity and functional redundancy of CYP6B and CYP9A genes challenge resistance management and pest control strategies as many P450s are available to insects to cope with chemical stresses they encounter.
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Affiliation(s)
- Yu Shi
- Key Laboratory of Plant Immunity and College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Qianqian Jiang
- Key Laboratory of Plant Immunity and College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Yihua Yang
- Key Laboratory of Plant Immunity and College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
| | - René Feyereisen
- Department of Plant and Environmental Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Yidong Wu
- Key Laboratory of Plant Immunity and College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
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Amezian D, Nauen R, Le Goff G. Transcriptional regulation of xenobiotic detoxification genes in insects - An overview. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 174:104822. [PMID: 33838715 DOI: 10.1016/j.pestbp.2021.104822] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 02/08/2021] [Accepted: 03/02/2021] [Indexed: 05/21/2023]
Abstract
Arthropods have well adapted to the vast array of chemicals they encounter in their environment. Whether these xenobiotics are plant allelochemicals or anthropogenic insecticides one of the strategies they have developed to defend themselves is the induction of detoxification enzymes. Although upregulation of detoxification enzymes and efflux transporters in response to specific inducers has been well described, in insects, yet, little is known on the transcriptional regulation of these genes. Over the past twenty years, an increasing number of studies with insects have used advanced genetic tools such as RNAi, CRISPR/Cas9 and reporter gene assays to dissect the genomic grounds of their xenobiotic response and hence contributed substantially in improving our knowledge on the players involved. Xenobiotics are partly recognized by various "xenobiotic sensors" such as membrane-bound or nuclear receptors. This initiates a molecular reaction cascade ultimately leading to the translocation of a transcription factor to the nucleus that recognizes and binds to short sequences located upstream their target genes to activate transcription. To date, a number of signaling pathways were shown to mediate the upregulation of detoxification enzymes in arthropods and to play a role in either metabolic resistance to insecticides or host-plant adaptation. These include nuclear receptors AhR/ARNT and HR96, GPCRs, CncC and MAPK/CREB. Recent work reveals that upregulation and activation of some components of these pathways as well as polymorphism in the binding motifs of transcription factors are linked to insects' adaptive processes. The aim of this mini-review is to summarize and describe recent work that shed some light on the main regulatory routes of detoxification gene expression in insects.
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Affiliation(s)
- Dries Amezian
- Université Côte d'Azur, INRAE, CNRS, ISA, F-06903 Sophia Antipolis, France
| | - Ralf Nauen
- Bayer AG, Crop Science Division, R&D, Alfred Nobel-Strasse 50, 40789 Monheim, Germany.
| | - Gaëlle Le Goff
- Université Côte d'Azur, INRAE, CNRS, ISA, F-06903 Sophia Antipolis, France.
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Israni B, Wouters FC, Luck K, Seibel E, Ahn SJ, Paetz C, Reinert M, Vogel H, Erb M, Heckel DG, Gershenzon J, Vassão DG. The Fall Armyworm Spodoptera frugiperda Utilizes Specific UDP-Glycosyltransferases to Inactivate Maize Defensive Benzoxazinoids. Front Physiol 2020; 11:604754. [PMID: 33408643 PMCID: PMC7781194 DOI: 10.3389/fphys.2020.604754] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/24/2020] [Indexed: 11/13/2022] Open
Abstract
The relationship between plants and insects is continuously evolving, and many insects rely on biochemical strategies to mitigate the effects of toxic chemicals in their food plants, allowing them to feed on well-defended plants. Spodoptera frugiperda, the fall armyworm (FAW), accepts a number of plants as hosts, and has particular success on plants of the Poaceae family such as maize, despite their benzoxazinoid (BXD) defenses. BXDs stored as inert glucosides are converted into toxic aglucones by plant glucosidases upon herbivory. DIMBOA, the main BXD aglucone released by maize leaves, can be stereoselectively re-glucosylated by UDP-glycosyltransferases (UGTs) in the insect gut, rendering it non-toxic. Here, we identify UGTs involved in BXD detoxification by FAW larvae and examine how RNAi-mediated manipulation of the larval glucosylation capacity toward the major maize BXD, DIMBOA, affects larval growth. Our findings highlight the involvement of members of two major UGT families, UGT33 and UGT40, in the glycosylation of BXDs. Most of the BXD excretion in the frass occurs in the form of glucosylated products. Furthermore, the DIMBOA-associated activity was enriched in the gut tissue, with a single conserved UGT33 enzyme (SfUGT33F28) being dedicated to DIMBOA re-glucosylation in the FAW gut. The knock-down of its encoding gene reduces larval performance in a strain-specific manner. This study thus reveals that a single UGT enzyme is responsible for detoxification of the major maize-defensive BXD in this pest insect.
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Affiliation(s)
- Bhawana Israni
- Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Felipe C Wouters
- Max Planck Institute for Chemical Ecology, Jena, Germany.,Department of Chemistry, Federal University of São Carlos, São Carlos, Brazil
| | - Katrin Luck
- Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Elena Seibel
- Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Seung-Joon Ahn
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Mississippi State, MS, United States
| | | | | | - Heiko Vogel
- Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Matthias Erb
- Institute of Plant Sciences, University of Bern, Bern, Switzerland
| | - David G Heckel
- Max Planck Institute for Chemical Ecology, Jena, Germany
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12
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Hafeez M, Qasim M, Ali S, Yousaf HK, Waqas M, Ali E, Ahmad MA, Jan S, Bashir MA, Noman A, Wang M, Gharmh HA, Khan KA. Expression and functional analysis of P450 gene induced tolerance/resistance to lambda-cyhalothrin in quercetin fed larvae of beet armyworm Spodoptera exigua (Hübner). Saudi J Biol Sci 2020; 27:77-87. [PMID: 31889821 PMCID: PMC6933212 DOI: 10.1016/j.sjbs.2019.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/20/2019] [Accepted: 05/21/2019] [Indexed: 12/04/2022] Open
Abstract
Beet armyworm, Spodoptera exigua (Hübner) is an agronomical important and most devastating polyphagous pest that damages a variety of crops around the globe including China. Quercetin is one of the abundant dietary flavonoids and the important defense allelochemicals in plants. Therefore, the changes in insect detoxification enzymes activities in response to plants allelochemicals may result increased the sensitivity to insecticides. In this study, we examined the induced effect of quercetin on larval tolerance to lambda-cyhalothrin in S. exigua. Application of cytochrome P450 inhibitor piperonyl butoxide (PBO) significantly synergized the lambda-cyhalothrin toxicity in quercetin-fed S. exigua larvae. Moreover, larval weight significantly reduced in quercetin, lambda-cyhalothrin, and quercetin + lambda-cyhalothrin treatment. Furthermore, our results showed that the P450 detoxification enzyme effectively increased in all treatments as compared to the control. Quantitative Real-time PCR analysis revealed that expression level of CYP6AE10 significantly upregulated in larvae treated with quercetin, lambda-cyhalothrin and quercetin + lambda-cyhalothrin in the midgut and fat body respectively. In addition, RNAi mediated knockdown of CYP6AE10 in S. exigua larvae significantly decreased the transcription level of target cytochrome P450 gene followed by the exposure with quercetin, lambda-cyhalothrin, and quercetin + lambda-cyhalothrin. Similarly, the knockdown of CYP6AE10 by the injection of dsRNA led to increased mortality after the treatment with respective chemicals. Overall, these data showed that P450s might possibly play an important role in the metabolic adaptation of S. exigua larvae to its host plant defense allelochemicals as well as insecticides. In conclusion, S. exigua can take benefit from its host plant's secondary metabolites to elaborate its defense against synthetic insecticides.
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Affiliation(s)
- Muhammad Hafeez
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, Hubei 430070, PR China
| | - Muhammad Qasim
- Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Science, Zhejiang University, Hangzhou 310058, China
| | - Sajjad Ali
- Department of Botany, Bacha Khan University, Charsadda 24630, Pakistan
| | - Hafiz Kamran Yousaf
- College of Plant Protection Department of Entomology, China Agriculture University, Beijing 100193, China
| | - Muhammad Waqas
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, Hubei 430070, PR China
| | - Ehsan Ali
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, Hubei 430070, PR China
| | - Muhammad Afaq Ahmad
- College of Plant Health and Medicine, Qingdao Agricultural University, China
| | - Saad Jan
- Department of Agriculture Entomology Section, Bacha Khan University, Charsadda 24630, Pakistan
| | - Muhammad Amjad Bashir
- Department of Plant Protection, Faculty of Agriculture Sciences, Ghazi University, Dera Ghazi Khan 32200, Punjab, Pakistan
| | - Ali Noman
- Department of Botany Government College University, Faisalabad 38040, Pakistan
| | - Mo Wang
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, Hubei 430070, PR China
| | - Hamed A. Gharmh
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Biology Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
| | - Khalid Ali Khan
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
- Biology Department, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia
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13
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Etges WJ. Evolutionary genomics of host plant adaptation: insights from Drosophila. CURRENT OPINION IN INSECT SCIENCE 2019; 36:96-102. [PMID: 31542627 DOI: 10.1016/j.cois.2019.08.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 08/13/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Variation in gene expression in response to the use of alternate host plants can reveal genetic and physiological mechanisms explaining why insect-host relationships vary from host specialism to generalism. Interpreting transcriptome variation relies on well-annotated genomes, making drosophilids valuable model systems, particularly those species with tractable ecological associations. Patterns of whole genome expression and alternate gene splicing in response to growth on different hosts have revealed expression of gene networks of known detoxification genes as well as novel functionally enriched genes of diverse metabolic and structural functions. Integrating trancriptomic responses with fitness differences and levels of phenotypic plasticity in response to alternate hosts will help to reveal the general nature of genotype-phenotype relationships.
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Affiliation(s)
- William J Etges
- Ecology, Evolution and Organismal Biology, Department of Biological Sciences, SCEN 632, 1 University of Arkansas, Fayetteville, AR 72701, USA.
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14
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Ma K, Li F, Tang Q, Liang P, Liu Y, Zhang B, Gao X. CYP4CJ1-mediated gossypol and tannic acid tolerance in Aphis gossypii Glover. CHEMOSPHERE 2019; 219:961-970. [PMID: 30572243 DOI: 10.1016/j.chemosphere.2018.12.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/01/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
Cytochrome P450 monooxygenases play a key role in herbivorous pest adaptation to host plants by the detoxification against plant allelochemicals. A new P450 gene (CYP4CJ1) was identified from Aphis gossypii, which displayed a positive response to plant allelochemicals. The transcript levels of CYP4CJ1 could be significantly induced by both gossypol and tannic acid. Knockdown of CYP4CJ1 increased the sensitivity of A. gossypii to these two plant allelochemicals. These results suggest that CYP4CJ1 could be involved in the tolerance of A. gossypii to some plant allelochemicals. Subsequently, we examined the regulatory mechanism of CYP4CJ1 based on the transcriptional and post-transcriptional level. A promoter region from -1422 to -1166 of CYP4CJ1 was identified, which was an essential plant allelochemical responsive region. In addition, miR-4133-3p was found to participate in the regulation of CYP4CJ1 post-transcriptionally. Our results suggest that the transcript abundance of CYP4CJ1, following the exposure of A. gossypii to gossypol and tannic acid can be attributed to both the transcriptional and post-transcriptional regulation mechanisms. These results are important for understanding the roles of P450s in the plant allelochemical tolerance of A. gossypii.
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Affiliation(s)
- Kangsheng Ma
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - Fen Li
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - Qiuling Tang
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - Pingzhuo Liang
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - Ying Liu
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - Baizhong Zhang
- College of Resources and Environment, Henan Institute of Science and Technology, Xinxiang, 453000, China
| | - Xiwu Gao
- Department of Entomology, China Agricultural University, Beijing, 100193, China.
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15
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Zhang X, Kang X, Wu H, Silver K, Zhang J, Ma E, Zhu KY. Transcriptome-wide survey, gene expression profiling and exogenous chemical-induced transcriptional responses of cytochrome P450 superfamily genes in migratory locust (Locusta migratoria). INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2018; 100:66-77. [PMID: 29959977 DOI: 10.1016/j.ibmb.2018.06.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 06/14/2018] [Accepted: 06/22/2018] [Indexed: 06/08/2023]
Abstract
Cytochrome P450 monooxygenases (CYPs) belong to a large superfamily of heme-containing enzymes catalyzing at least 60 different types of chemically distinct reactions. Insect CYPs play key roles in biotransformation of insecticides and plant chemicals, and are implicated in insecticide resistance and insect adaptation to their host plants. Insect CYPs are well studied in model insects, but little is known about the CYP superfamily in paurometabolous insects. We employed Illumina sequencing technology to identify 71 partial and 78 full-length open reading frames (ORFs) of LmCYP genes from the migratory locust (Locusta migratoria), one of the most destructive paurometabolous insect pests in the world. Seventy-eight LmCYPs with complete ORFs were formally named and classified into 19 families and 43 subfamilies. The majority of LmCYPs were mainly expressed in nymphal and adult stages, but LmCYP expression varied widely among thirteen different tissues examined. Regulatory elements were predicted in the promoter regions of LmCYP genes, and subsequent exposure of locusts to 12 different exogenous chemicals showed that 2-tridecanone and xanthotoxin were the most effective at increasing LmCYP expression. Our results represent the first transcriptome-wide analysis of the LmCYP superfamily from migratory locust, and provide a foundation for understanding the physiological functions, functional diversity, evolution, and regulatory mechanisms controlling the expression of the CYP gene superfamily in the locust.
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Affiliation(s)
- Xueyao Zhang
- Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xiaolin Kang
- Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Haihua Wu
- Research 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
| | - Jianzhen Zhang
- Research Institute of Applied Biology, Shanxi University, Taiyuan, Shanxi 030006, China.
| | - Enbo Ma
- Research 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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16
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Li L, Lan M, Lu W, Li Z, Xia T, Zhu J, Ye M, Gao X, Wu G. De novo transcriptomic analysis of the alimentary tract of the tephritid gall fly, Procecidochares utilis. PLoS One 2018; 13:e0201679. [PMID: 30138350 PMCID: PMC6107134 DOI: 10.1371/journal.pone.0201679] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 07/19/2018] [Indexed: 11/19/2022] Open
Abstract
The tephritid gall fly, Procecidochares utilis, is an important obligate parasitic insect of the malignant weed Eupatorium adenophorum which biosynthesizes toxic secondary metabolites. Insect alimentary tracts secrete several enzymes that are used for detoxification, including cytochrome P450s, glutathione S-transferases, and carboxylesterases. To explore the adaptation of P. utilis to its toxic host plant, E. adenophorum at molecular level, we sequenced the transcriptome of the alimentary tract of P. utilis using Illumina sequencing. Sequencing and de novo assembly yielded 62,443 high-quality contigs with an average length of 604 bp that were further assembled into 45,985 unigenes with an average length of 674 bp and an N50 of 983 bp. Among the unigenes, 30,430 (66.17%) were annotated by alignment against the NCBI non-redundant protein (Nr) database, while 16,700 (36.32%), 16,267 (35.37%), and 11,530 (25.07%) were assigned functions using the Clusters of Orthologous Groups (COG), Kyoto Encyclopedia of Genes and Genomes (KEGG), and Gene Ontology (GO) databases, respectively. Using the comprehensive transcriptome data set, we manually identified several important gene families likely to be involved in the detoxification of toxic compounds including 21 unigenes within the glutathione S-transferase (GST) family, 22 unigenes within the cytochrome P450 (P450) family, and 16 unigenes within the carboxylesterase (CarE) family. Quantitative PCR was used to verify eight, six, and two genes of GSTs, P450s, and CarEs, respectively, in different P. utilis tissues and at different developmental stages. The detoxification enzyme genes were mainly expressed in the foregut and midgut. Moreover, the unigenes were higher expressed in the larvae, pupae, and 3-day adults, while they were expressed at lower levels in eggs. These transcriptomic data provide a valuable molecular resource for better understanding the function of the P. utilis alimentary canal. These identified genes could be pinpoints to address the molecular mechanisms of P. utilis interacting with toxic plant host.
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Affiliation(s)
- Lifang Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Mingxian Lan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Wufeng Lu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Zhaobo Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Tao Xia
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Jiaying Zhu
- Key Laboratory of Forest Disaster Warning and Control of Yunnan Province, Southwest Forestry University, Kunming, China
| | - Min Ye
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Xi Gao
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- * E-mail: (XG); (GW)
| | - Guoxing Wu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
- * E-mail: (XG); (GW)
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17
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Sajitha TP, Manjunatha BL, Siva R, Gogna N, Dorai K, Ravikanth G, Uma Shaanker R. Mechanism of Resistance to Camptothecin, a Cytotoxic Plant Secondary Metabolite, by Lymantria sp. Larvae. J Chem Ecol 2018; 44:611-620. [DOI: 10.1007/s10886-018-0960-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 04/07/2018] [Accepted: 04/13/2018] [Indexed: 10/16/2022]
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18
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Wang RL, He YN, Staehelin C, Liu SW, Su YJ, Zhang JE. Identification of Two Cytochrome Monooxygenase P450 Genes, CYP321A7 and CYP321A9, from the Tobacco Cutworm Moth (Spodoptera Litura) and Their Expression in Response to Plant Allelochemicals. Int J Mol Sci 2017; 18:E2278. [PMID: 29084173 PMCID: PMC5713248 DOI: 10.3390/ijms18112278] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 10/13/2017] [Accepted: 10/27/2017] [Indexed: 12/13/2022] Open
Abstract
Larvae of the polyphagous tobacco cutworm moth, Spodoptera litura (S. litura), encounter potentially toxic allelochemicals in food. It is therefore important for S. litura to produce detoxification enzymes such as cytochrome P450 monooxygenases (P450s). In this study, we have identified two novel cytochrome P450 genes of S. litura, named CYP321A7 and CYP321A9. Phylogenetic analysis indicated that they belong to the CYP321A subfamily. Expression levels of these genes at different development stages were determined by real-time quantitative polymerase chain reaction (PCR). The highest expression was found in the midgut and the fat body. Larvae fed with a diet supplemented with xanthotoxin or coumarin showed a strongly increased expression of CYP321A7 and CYP321A9 in the midgut and fat body as compared to larvae that consumed a control diet. In contrast, larvae consuming a diet containing aflatoxin B1 or quercetin did not induce the expression of these genes. CYP321A7 and CYP321A9 showed different expression profiles with respect to certain allelochemicals. For example, a diet containing cinnamic acid stimulated the expression of CYP321A9, whereas no changes were observed for CYP321A7. We suggest that the fine tuning of P450 gene expression is an important adaptation mechanism that allows polyphagous S. litura larvae to survive in a changing chemical environment.
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Affiliation(s)
- Rui-Long Wang
- Guangdong Engineering Research Center for Modern Eco-Agruculture and Circular Agriculture, Guangzhou 510642, China.
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China.
| | - Ya-Nan He
- Guangdong Engineering Research Center for Modern Eco-Agruculture and Circular Agriculture, Guangzhou 510642, China.
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China.
| | - Christian Staehelin
- State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, East Campus, Guangzhou 510006, China.
| | - Shi-Wei Liu
- Guangdong Engineering Research Center for Modern Eco-Agruculture and Circular Agriculture, Guangzhou 510642, China.
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China.
| | - Yi-Juan Su
- Guangdong Engineering Research Center for Modern Eco-Agruculture and Circular Agriculture, Guangzhou 510642, China.
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China.
| | - Jia-En Zhang
- Guangdong Engineering Research Center for Modern Eco-Agruculture and Circular Agriculture, Guangzhou 510642, China.
- Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, China.
- Key Laboratory of Agroecology and Rural Environment of Guangdong Regular Higher Education Institutions, South China Agricultural University, Guangzhou 510642, China.
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19
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Cai H, Bai Y, Wei H, Lin S, Chen Y, Tian H, Gu X, Murugan K. Effects of tea saponin on growth and development, nutritional indicators, and hormone titers in diamondback moths feeding on different host plant species. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 131:53-59. [PMID: 27265827 DOI: 10.1016/j.pestbp.2015.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Revised: 12/19/2015] [Accepted: 12/31/2015] [Indexed: 06/05/2023]
Abstract
The diamondback moth (DBM) is an important worldwide pest. This insect has been studied for several decades; however, its control remains problematic. Numerous chemical insecticides have become ineffective and chemical residues constitute an important problem. In the present study, we determined the mortality of 3rd instar DBM larvae feeding on three different host plant species and exposed to various concentrations of tea saponin (TS). In addition, we evaluated growth and development parameters, nutritional indicators, and juvenile hormone (JH) and molting hormone (MH) titers in 2nd instar larvae exposed to LC20 and LC50 doses of TS. We found that treatment of DBM larvae with LC20 and LC50 doses of TS led to lower growth rates, decreased feed consumption, reduced frass production, lower pupal weights, reduced percentage pupation, slower adult emergence percentages, and diminished fecundity, but prolonged durations of the larval and pupal periods. The efficiency of conversion of ingested and digested food increased, but the approximate digestibility did not differ significantly between treatments and controls. JH and MH titers were higher after TS treatment; these increases varied according to the host species and TS concentration. Our results indicate that TS represents a potential new alternative insecticide based on its natural origin, low cost, and minimum environmental impact.
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Affiliation(s)
- Hongjiao Cai
- College of Plant Protection, Fujian Agriculture and Forestry University, 15 Shangxia Dian Road, Fuzhou 350002, China; Fishery College, Jimei University, 43 Yindou Road, Xiame 361021, China
| | - Yan Bai
- College of Plant Protection, Fujian Agriculture and Forestry University, 15 Shangxia Dian Road, Fuzhou 350002, China
| | - Hui Wei
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, 247 Wusi Road, Fuzhou 350003, China.
| | - Shuo Lin
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, 247 Wusi Road, Fuzhou 350003, China
| | - Yixin Chen
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, 247 Wusi Road, Fuzhou 350003, China
| | - Houjun Tian
- Institute of Plant Protection, Fujian Academy of Agricultural Sciences, 247 Wusi Road, Fuzhou 350003, China
| | - Xiaojun Gu
- College of Plant Protection, Fujian Agriculture and Forestry University, 15 Shangxia Dian Road, Fuzhou 350002, China.
| | - Kadarkarai Murugan
- Division of Entomology, Department of Zoology, School of Life Sciences, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
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20
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Tian JH, Hu JS, Li FC, Ni M, Li YY, Wang BB, Xu KZ, Shen WD, Li B. Effects of TiO2 nanoparticles on nutrition metabolism in silkworm fat body. Biol Open 2016; 5:764-9. [PMID: 27185267 PMCID: PMC4920180 DOI: 10.1242/bio.015610] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Silkworm (Bombyx mori) is an important economic insect with a fat body that plays a crucial role in the storage and transfer of nutrients. It is also known that TiO2 nanoparticles (NPs) can improve feed efficiency and promote silk protein synthesis in the silkworm. In this study, we profiled gene expression in the silkworm fat body after TiO2 NP treatment, validated the major RNA-seq findings, and determined the contents of trehalose and triglyceride, the activity of lipase, and the amount of total proteins. RNA-seq analysis revealed that TiO2 NP treatment caused significant expression changes in 341 genes (P≤0.01), 138 of which were upregulated while the other 203 were downregulated. The expression levels of two target genes in the insulin signaling pathway and two protein metabolism-related target genes, three lipid metabolism-associated target genes, two carbohydrate metabolism related target genes and expression levels of seven heat shock protein genes were increased, and that of threonine dehydratase gene and fatty acid transport protein gene were decreased. The RNA-seq results of 16 genes were validated by quantitative real-time PCR. The lipase activity, content of trehalose, and amount of total proteins were elevated by 3.86-fold, 1.34-fold, and 1.21-fold, respectively, and the content of triglyceride was decreased by 0.94-fold after TiO2 NP treatment. These results indicated that TiO2 NPs activated the insulin signaling pathway, promoted the metabolism of protein, fat, and carbohydrate, and improved nutrition metabolism. Our study provides new support for the understanding of the beneficial effect of TiO2 NPs on silkworm nutrient metabolism. Summary: Our study indicates that TiO2 nanoparticles promote nutrient metabolism in the fat body of silkworms, and provide a reference for studies investigating the biological function of TiO2 nanoparticles.
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Affiliation(s)
- J H Tian
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - J S Hu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - F C Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - M Ni
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - Y Y Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - B B Wang
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - K Z Xu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - W D Shen
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
| | - B Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, China National Engineering Laboratory for Modern Silk, Soochow University, Suzhou, Jiangsu 215123, China
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21
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Zhu F, Moural TW, Nelson DR, Palli SR. A specialist herbivore pest adaptation to xenobiotics through up-regulation of multiple Cytochrome P450s. Sci Rep 2016; 6:20421. [PMID: 26861263 PMCID: PMC4748221 DOI: 10.1038/srep20421] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 01/04/2016] [Indexed: 11/09/2022] Open
Abstract
The adaptation of herbivorous insects to their host plants is hypothesized to be intimately associated with their ubiquitous development of resistance to synthetic pesticides. However, not much is known about the mechanisms underlying the relationship between detoxification of plant toxins and synthetic pesticides. To address this knowledge gap, we used specialist pest Colorado potato beetle (CPB) and its host plant, potato, as a model system. Next-generation sequencing (454 pyrosequencing) was performed to reveal the CPB transcriptome. Differential expression patterns of cytochrome P450 complement (CYPome) were analyzed between the susceptible (S) and imidacloprid resistant (R) beetles. We also evaluated the global transcriptome repertoire of CPB CYPome in response to the challenge by potato leaf allelochemicals and imidacloprid. The results showed that more than half (51.2%) of the CBP cytochrome P450 monooxygenases (P450s) that are up-regulated in the R strain are also induced by both host plant toxins and pesticide in a tissue-specific manner. These data suggest that xenobiotic adaptation in this specialist herbivore is through up-regulation of multiple P450s that are potentially involved in detoxifying both pesticide and plant allelochemicals.
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Affiliation(s)
- Fang Zhu
- Department of Entomology, University of Kentucky, Lexington, KY 40546, USA.,Department of Entomology, Washington State University, Pullman, WA 99164, USA
| | - Timothy W Moural
- Department of Chemistry, Washington State University, Pullman 99164, USA
| | - David R Nelson
- Department of Microbiology, Immunology and Biochemistry, University of Tennessee, Memphis, TN 38163, USA
| | - Subba R Palli
- Department of Entomology, University of Kentucky, Lexington, KY 40546, USA
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Maldonado A, Johnson A, Gochfeld D, Slattery M, Ostrander GK, Bingham JP, Schlenk D. Hard coral (Porites lobata) extracts and homarine on cytochrome P450 expression in Hawaiian butterflyfishes with different feeding strategies. Comp Biochem Physiol C Toxicol Pharmacol 2016; 179:57-63. [PMID: 26297807 DOI: 10.1016/j.cbpc.2015.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 08/07/2015] [Accepted: 08/10/2015] [Indexed: 12/27/2022]
Abstract
Dietary specialists tend to be less susceptible to the effects of chemical defenses produced by their prey compared to generalist predators that feed upon a broader range of prey species. While many researchers have investigated the ability of insects to detoxify dietary allelochemicals, little research has been conducted in marine ecosystems. We investigated metabolic detoxification pathways in three species of butterflyfishes: the hard coral specialist feeder, Chaetodon multicinctus, and two generalist feeders, Chaetodon auriga and Chaetodon kleinii. Each species was fed tissue homogenate of the hard coral Porites lobata or the feeding deterrent compound homarine (found in the coral extract), and the expression and catalytic activity of cytochrome P450 (CYP) 3A-like and CYP2-like enzymes were examined after one-week of treatment. The P. lobata homogenate significantly induced content and catalytic activity of CYP2-like and CYP3A-like forms, by 2-3 fold and by 3-9 fold, respectively, in C. multicinctus. Homarine caused a significant decrease of CYP2-like and CYP3A-like proteins at the high dose in C. kleinii and 60-80% mortality in that species. Homarine also induced CYP3A-like content by 3-fold and catalytic activity by 2-fold in C. auriga, while causing non-monotonic increases in CYP2-like and CYP3A-like catalytic activity in C. multicinctus. Our results indicate that dietary exposure to coral homogenates and the feeding deterrent constituent within these homogenates caused species-specific modulation of detoxification enzymes consistent with the prey selection strategies of generalist and specialist butterflyfishes.
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Affiliation(s)
- Aileen Maldonado
- Department of Environmental Science, University of California, Riverside, 2258 Geology, 900 University Ave., Riverside, CA 92521, USA.
| | - Amber Johnson
- Department of Environmental Science, University of California, Riverside, 2258 Geology, 900 University Ave., Riverside, CA 92521, USA
| | - Deborah Gochfeld
- National Center for Natural Products Research and Department of BioMolecular Science, University of Mississippi, P.O. Box 1848, University, MS 38677, USA
| | - Marc Slattery
- National Center for Natural Products Research and Department of BioMolecular Science, University of Mississippi, P.O. Box 1848, University, MS 38677, USA
| | - Gary K Ostrander
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL 32306-1330, USA
| | - Jon-Paul Bingham
- Department of Molecular Bioscience and Bioengineering, University of Hawaii at Manoa, 1955 East-West Road, Ag. Science 218, Honolulu, HI 96822, USA
| | - Daniel Schlenk
- Department of Environmental Science, University of California, Riverside, 2258 Geology, 900 University Ave., Riverside, CA 92521, USA
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Zhu YC, Yao J, Luttrell R. Identification of Genes Potentially Responsible for extra-Oral Digestion and Overcoming Plant Defense from Salivary Glands of the Tarnished Plant Bug (Hemiptera: Miridae) Using cDNA Sequencing. JOURNAL OF INSECT SCIENCE (ONLINE) 2016; 16:iew041. [PMID: 27324587 PMCID: PMC4913459 DOI: 10.1093/jisesa/iew041] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 05/12/2016] [Indexed: 05/14/2023]
Abstract
Saliva is known to play a crucial role in tarnished plant bug (TPB, Lygus lineolaris [Palisot de Beauvois]) feeding. By facilitating the piercing, the enzyme-rich saliva may be used for extra-oral digestion and for overcoming plant defense before the plant fluids are ingested by TPBs. To identify salivary gland genes, mRNA was extracted from salivary glands and cDNA library clones were sequenced. A de novo-assembling of 7,000 Sanger sequences revealed 666 high-quality unique cDNAs with an average size of 624 bp, in which the identities of 347 cDNAs were determined using Blast2GO. Kyoto Encyclopedia of Genes and Genomes analysis indicated that these genes participate in eighteen metabolic pathways. Identifications of large number of enzyme genes in TPB salivary glands evidenced functions for extra-oral digestion and feeding damage mechanism, including 45 polygalacturonase, two α- amylase, one glucosidase, one glycan enzyme, one aminopeptidase, four lipase, and many serine protease cDNAs. The presence of multiple transcripts, multigene members, and high abundance of cell wall degradation enzymes (polygalacturonases) indicated that the enzyme-rich saliva may cause damage to plants by breaking down plant cell walls to make nutrients available for feeding. We also identified genes potentially involved in insect adaptation and detoxifying xenobiotics that may allow insects to overcome plant defense responses, including four glutathione S-transferases, three esterases, one cytochrome P450, and several serine proteases. The gene profiles of TPB salivary glands revealed in this study provides a foundation for further understanding and potential development of novel enzymatic inhibitors, or other RNAi approaches that may interrupt or minimize TPB feeding damage.
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Affiliation(s)
- Yu-Cheng Zhu
- USDA-ARS Southern Insect Management Research Unit, Stoneville, MS 38776, USA
| | - Jianxiu Yao
- USDA-ARS Southern Insect Management Research Unit, Stoneville, MS 38776, USA
| | - Randall Luttrell
- USDA-ARS Southern Insect Management Research Unit, Stoneville, MS 38776, USA
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Antioxidant and antitumor activities of 4-arylcoumarins and 4-aryl-3,4-dihydrocoumarins. Biochimie 2014; 107 Pt B:203-10. [DOI: 10.1016/j.biochi.2014.03.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 03/28/2014] [Indexed: 11/18/2022]
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Zhang C, Wong A, Zhang Y, Ni X, Li X. Common and unique cis-acting elements mediate xanthotoxin and flavone induction of the generalist P450 CYP321A1. Sci Rep 2014; 4:6490. [PMID: 25262756 PMCID: PMC4178294 DOI: 10.1038/srep06490] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Accepted: 08/26/2014] [Indexed: 12/04/2022] Open
Abstract
How polyphagous herbivores up-regulate their counterdefense genes in response to a broad range of structurally different allelochemicals remains largely unknown. To test whether this is accomplished by having more allelochemical-response elements or the similar number of functionally more diverse elements, we mapped out the cis-acting elements mediating the induction of the allelochemical-metabolizing CYP321A1 from the generalist Helicoverpa zea by xanthotoxin and flavone, two structurally distinct allelochemicals with very different encounter rate by this species. Seven xanthotoxin-responsive elements were localized by analyzing promoter activities of varying length of CYP321A1 promoter in H. zea fatbody cells. Compared with the 5 flavone-responsive elements mapped out previously, there are four common elements (1 essential element, 2 enhancers, and 1 negative element) mediating induction of CYP321A1 by both of the two allelochemicals. The remaining four elements (3 enhancers and 1 negative element), however, only regulate induction of CYP321A1 by either of the two allelochemicals. Co-administration of the two allelochemicals resulted in an induction fold that is significantly lower than the expected additive value of the two allelochemicals. These results indicate that xanthotoxin- and flavone-induced expressions of CYP321A1 are mediated mainly by the functionally more diverse common elements although the allelochemical-unique elements also play a role.
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Affiliation(s)
- Chunni Zhang
- Key Laboratory of Plant Protection Resources and Pest Integrated Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
- Department of Entomology and BIO5 Institute, University of Arizona, Tucson, AZ 85721, USA
| | - Andrew Wong
- Department of Entomology and BIO5 Institute, University of Arizona, Tucson, AZ 85721, USA
| | - Yalin Zhang
- Key Laboratory of Plant Protection Resources and Pest Integrated Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xinzhi Ni
- USDA-ARS Crop Genetics and Breeding Research Unit, Tifton, GA 31793, USA
| | - Xianchun Li
- Department of Entomology and BIO5 Institute, University of Arizona, Tucson, AZ 85721, USA
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Insecticidal Activity and Expression of Cytochrome P450 Family 4 Genes in Aedes albopictus After Exposure to Pyrethroid Mosquito Coils. Protein J 2014; 33:457-64. [DOI: 10.1007/s10930-014-9580-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Li B, Zhang H, Ni M, Wang BB, Li FC, Xu KZ, Shen WD, Xia QY, Zhao P. Identification and characterization of six cytochrome P450 genes belonging to CYP4 and CYP6 gene families in the silkworm, Bombyx mori. Mol Biol Rep 2014; 41:5135-46. [DOI: 10.1007/s11033-014-3379-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 04/01/2014] [Indexed: 10/25/2022]
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Chan HH, Wajidi MFF, Zairi J. Molecular cloning and xenobiotic induction of seven novel cytochrome P450 monooxygenases in Aedes albopictus. JOURNAL OF INSECT SCIENCE (ONLINE) 2014; 14:163. [PMID: 25399430 PMCID: PMC5634052 DOI: 10.1093/jisesa/ieu025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 04/02/2013] [Indexed: 06/04/2023]
Abstract
Cytochrome P450 monooxygenase (P450) is a superfamily of enzymes that is important in metabolism of endogenous and exogenous compounds. In insects, these enzymes confer resistance to insecticides through its metabolic activities. Members of P450 from family 6 in insects are known to play a role in such function. In this study, we have isolated seven novel family 6 P450 from Aedes albopictus (Skuse) (Diptera: Culicidae), a vector of dengue and chikungunya fever. Induction profile of these seven genes was studied using several insecticides and xenobiotics. It was found that deltamethrin and permethrin did not induce expression of any genes. Another insecticide, temephos, inhibited expression of CYP6P15 for fivefold and twofold for CYP6N29, CYP6Y7, and CYP6Z18. In addition, copper II sulfate induced expression of CYP6M17 and CYP6N28 for up to sixfold. Benzothiazole (BZT), a tire leachate induced the expression of CYP6M17 by fourfold, CYP6N28 by sevenfold, but inhibited the expression of CYP6P15 for threefold and CYP6Y7 for twofold. Meanwhile, piperonyl butoxide (PBO) induced the expression CYP6N28 (twofold), while it inhibited the expression of CYP6P15 (fivefold) and CYP6Y7 (twofold). Remarkably, all seven genes were induced two- to eightfold by acetone in larval stage, but not adult stage. Expression of CYP6N28 was twofold higher, while expression of CYP6P15 was 15-fold lower in adult than larva. The other five P450s were not differentially expressed between the larvae and adult. This finding showed that acetone can be a good inducer of P450 in Ae. albopictus. On the other hand, temephos can act as good suppressor of P450, which may affect its own bioefficacy because it needs to be bioactivated by P450. To the best of our knowledge, this is the first report on acetone-inducible P450 in insects. Further study is needed to characterize the mechanisms involved in acetone induction in P450.
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Affiliation(s)
- Hiang Hao Chan
- School of Biological Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
| | | | - Jaal Zairi
- School of Biological Sciences, Universiti Sains Malaysia, 11800 Minden, Malaysia
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Natural history-driven, plant-mediated RNAi-based study reveals CYP6B46's role in a nicotine-mediated antipredator herbivore defense. Proc Natl Acad Sci U S A 2013; 111:1245-52. [PMID: 24379363 DOI: 10.1073/pnas.1314848111] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Manduca sexta (Ms) larvae are known to efficiently excrete ingested nicotine when feeding on their nicotine-producing native hostplant, Nicotiana attenuata. Here we describe how ingested nicotine is co-opted for larval defense by a unique mechanism. Plant-mediated RNAi was used to silence a midgut-expressed, nicotine-induced cytochrome P450 6B46 (CYP6B46) in larvae consuming transgenic N. attenuata plants producing MsCYP6B46 dsRNA. These and transgenic nicotine-deficient plants were planted into native habitats to study the phenotypes of larvae feeding on these plants and the behavior of their predators. The attack-behavior of a native wolf spider (Camptocosa parallela), a major nocturnal predator, provided the key to understanding MsCYP6B46's function: spiders clearly preferred CYP6B46-silenced larvae, just as they had preferred larvae fed nicotine-deficient plants. MsCYP6B46 redirects a small amount (0.65%) of ingested nicotine from the midgut into hemolymph, from which nicotine is exhaled through the spiracles as an antispider signal. CYP6B46-silenced larvae were more susceptible to spider-attack because they exhaled less nicotine because of lower hemolymph nicotine concentrations. CYP6B46-silenced larvae were impaired in distributing ingested nicotine from midgut to hemolymph, but not in the clearing of hemolymph nicotine or in the exhalation of nicotine from hemolymph. MsCYP6B46 could be a component of a previously hypothesized pump that converts nicotine to a short-lived, transportable, metabolite. Other predators, big-eyed bugs, and antlion larvae were insensitive to this defense. Thus, chemical defenses, too toxic to sequester, can be repurposed for defensive functions through respiration as a form of defensive halitosis, and predators can assist the functional elucidation of herbivore genes.
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30
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Zhang YE, Ma HJ, Feng DD, Lai XF, Chen ZM, Xu MY, Yu QY, Zhang Z. Induction of detoxification enzymes by quercetin in the silkworm. JOURNAL OF ECONOMIC ENTOMOLOGY 2012; 105:1034-1042. [PMID: 22812145 DOI: 10.1603/ec11287] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Quercetin is one of the most abundant flavonoids and the defense secondary metabolites in plants. In this study, the effect of quercetin on the growth of the silkworm larvae was investigated. Cytochrome P450 monooxygenases (P450s), glutathione S-transferases (GSTs), and carboxylesterases (COE) were assayed after exposure to different concentrations of quercetin for 3 d (short-term) and 7 d (long-term), respectively. The results showed that the weight gain of the silkworm larvae significantly decreased after the larvae were treated by different concentrations of quercetin except for the treatment with 0.5% quercetin. Activities of P450, GST, and COE were induced by 0.5 or 1% concentration of quercetin. In the midgut, the induction activity of P450s was reached to the highest level (2.3-fold) by 1% quercetin for 7 d, the highest induction activities of GSTs toward CHP and CDNB were 4.1-fold and 2.6-fold of controls by 1% quercetin after 7 d exposure, respectively. For COEs, the highest activity (2.3-fold) was induced by 0.5% quercetin for 7 d. However, P450s in whole body were higher inducible activities in short-term treatment than those in long-term treatment. The responses of eight cytochrome P450 (CYP) genes belonged to CYP6 and CYP9 families and seven GST genes were detected with real-time polymerase chain reaction. In addition, the genes induced by quercetin significantly were confirmed by qRT-PCR. CYP6AB5, CYP6B29, and GSTe8 were identified as inducible genes, of which the highest induction levels were 10.9-fold (0.5% quercetin for 7 d), 6.2-fold (1% quercetin for 7 d), and 7.1-fold (1% quercetin for 7 d), respectively.
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Affiliation(s)
- Yue-E Zhang
- The Institute of Agricultural and Life Sciences, Chongqing University, Chongqing 400044, China
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31
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Zhou J, Zhang G, Zhou Q. Molecular characterization of cytochrome P450 CYP6B47 cDNAs and 5'-flanking sequence from Spodoptera litura (Lepidoptera: Noctuidae): its response to lead stress. JOURNAL OF INSECT PHYSIOLOGY 2012; 58:726-736. [PMID: 22391394 DOI: 10.1016/j.jinsphys.2012.02.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Revised: 02/22/2012] [Accepted: 02/22/2012] [Indexed: 05/31/2023]
Abstract
In insects, P450s are responsible for the oxidative metabolism of structurally diverse endogenous and exogenous compounds including plant allelochemicals and insecticides. A novel full-length P450 cDNA, CYP6B47, was cloned from Spodoptera litura (Lepidoptera: Noctuidae). The sequence is 1718 bp in length with an ORF of 1509 bp encoding 503 amino acid residues. The phylogenetic analysis indicated that CYP6B47 belongs to CYP3 clan and second clade of CYP6Bs which contain 11 P450s from Noctuidae. Quantitative real-time PCR showed that CYP6B47 was expressed only in larvae stages and had a high level of transcription in the midgut and fat body. In addition, we cloned a 2141-bp 5'-flanking regions and presented the basal luciferase activities of promoter. We also predicted multiple putative elements for transcription factors binding in the 5'-flanking region. Interestingly, the expression of CYP6B47 significantly increased in the midgut and fat body after lead (Pb) exposure for 5 generations. Larvae tolerance to the alpha-cypermethrin (35% increased in LC(50)) and fenvalerate (52% increased in LC(50)) were improved after pre-exposure to 50 mg/kg Pb. These dates suggested that lead increased tolerance of larvae to insecticides mainly through transcriptional induction of detoxification genes including CYP6B47.
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Affiliation(s)
- Jialiang Zhou
- State Key Laboratory of Biological Control and Institute of Entomology, Sun Yat-sen University, Guangzhou 510275, China
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32
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Chung H, Boey A, Lumb C, Willoughby L, Batterham P, Daborn PJ. Induction of a detoxification gene in Drosophila melanogaster requires an interaction between tissue specific enhancers and a novel cis-regulatory element. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2011; 41:863-871. [PMID: 21807095 DOI: 10.1016/j.ibmb.2011.07.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Accepted: 07/19/2011] [Indexed: 05/31/2023]
Abstract
Organisms induce the expression of detoxification enzymes such as cytochrome P450s to deal with xenobiotics encountered in the environment. Research using cell culture systems has identified some of the cis-regulatory elements (CREs) and transcription factors involved in the induction of P450 genes in response to xenobiotic challenges. It was recently found that the CREs required for the basal expression of some P450s are distinct from the CREs involved in their induction. How these CREs mediate induction to xenobiotics in a tissue specific manner is not known. In this paper we show that, in Drosophila melanogaster, the induction response of the P450 gene Cyp6g1 to the xenobiotic Phenobarbital (PB) requires the presence of both tissue specific enhancers and a distinct CRE. The CRE does not drive gene expression but is required for the induction response. Site-directed mutagenesis of sequences within the CRE, sequences similar to mouse PB induction sequences, reduces the level of induction by PB, suggesting some degree of mechanistic conservation between flies and mice. This CRE may represent a unique class of CREs that has no inherent role in the basal transcriptional activity of genes, but is required for induction responses. Variations within this class of CREs may explain the variability of gene induction responses.
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Affiliation(s)
- Henry Chung
- Department of Genetics, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia
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P450s in plant–insect interactions. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:36-45. [DOI: 10.1016/j.bbapap.2010.09.012] [Citation(s) in RCA: 176] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Revised: 09/15/2010] [Accepted: 09/16/2010] [Indexed: 11/22/2022]
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Zhang C, Luo X, Ni X, Zhang Y, Li X. Functional characterization of cis-acting elements mediating flavone-inducible expression of CYP321A1. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2010; 40:898-908. [PMID: 20854909 DOI: 10.1016/j.ibmb.2010.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2010] [Revised: 08/31/2010] [Accepted: 09/03/2010] [Indexed: 05/29/2023]
Abstract
How plant allelochemicals elicit herbivore counterdefense genes remains largely unknown. To define the cis-acting elements for flavone inducibility of the allelochemical-metabolizing CYP321A1 from Helicoverpa zea, functions of varying length of CYP321A1 promoter are examined in H. zea fatbody cells. Progressive 3' deletions reveal presence of positive elements in the 5' untranslated region (UTR). Progressive 5' deletions map out regions of one essential element, four enhancers, and two silencers. Further progressive 5'deletions localize the essential element to a 36-bp region from -109 to -74. This essential element, designated as xenobiotic response element to flavone (XRE-Fla), contains a 5' AT-only TAAT inverted repeat, a GCT mirror repeat and a 3' antioxidant response element-like element. Internal deletions and substitution mutations show that the TAAT repeat is only necessary for the maximal flavone inducibility, whereas the other two components are necessary for the basal and flavone-induced expression of CYP321A1. Electrophoresis mobility shift assays demonstrate that XRE-Fla specifically binds to H. zea fatbody cell nuclear extracts and flavone treatment increases the nuclear concentrations of the yet-to-be characterized transcription factors binding to XRE-Fla. Taken together, CYP321A1 expression is regulated primarily by XRE-Fla and secondarily by other cis elements scattered in its promoter and 5' UTR.
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Affiliation(s)
- Chunni Zhang
- Key Laboratory of Plant Protection Resources and Pest Integrated Management, Ministry of Education, College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
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Shen GM, Jiang HB, Wang XN, Wang JJ. Evaluation of endogenous references for gene expression profiling in different tissues of the oriental fruit fly Bactrocera dorsalis (Diptera: Tephritidae). BMC Mol Biol 2010; 11:76. [PMID: 20923571 PMCID: PMC2972281 DOI: 10.1186/1471-2199-11-76] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2010] [Accepted: 10/06/2010] [Indexed: 01/19/2023] Open
Abstract
Background Quantitative real-time reverse transcriptase PCR (RT-qPCR) has been widely used for quantification of mRNA as a way to determine key genes involved in different biological processes. For accurate gene quantification analysis, normalization of RT-qPCR data is absolutely essential. To date, normalization is most frequently achieved by the use of internal controls, often referred to as reference genes. However, several studies have shown that the reference genes used for the quantification of mRNA expression can be affected by the experimental set-up or cell type resulting in variation of the expression level of these key genes. Therefore, the evaluation of reference genes is critical for gene expression profiling, which is often neglected in gene expression studies of insects. For this purpose, ten candidate reference genes were investigated in three different tissues (midgut, Malpighian tubules, and fat body) of the oriental fruit fly, Bactrocera dorsalis (Hendel). Results Two different programs, geNorm and Normfinder, were used to analyze the data. According to geNorm, α-TUB + ACT5 are the most appropriate reference genes for gene expression profiling across the three different tissues in the female flies, while ACT3 + α-TUB are considered as the best for males. Furthermore, we evaluated the stability of the candidate reference genes to determine the sexual differences in the same tissue. In the midgut and Malpighian tubules, ACT2 + α-TUB are the best choice for both males and females. However, α-TUB + ACT1 are the best pair for fat body. Meanwhile, the results calculated by Normfinder are quite the same as the results with geNorm; α-TUB is always one of the most stable genes in each sample validated by the two programs. Conclusions In this study, we validated the suitable reference genes for gene expression profiling in different tissues of B. dorsalis. Moreover, appropriate reference genes were selected out for gene expression profiling of the same tissues taking the sexual differences into consideration. This work not only formed a solid basis for future gene expression study in B. dorsalis, but also will serve as a resource to screen reference genes for gene expression studies in any other insects.
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Affiliation(s)
- Guang-Mao Shen
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, PR China
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36
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Sehlmeyer S, Wang L, Langel D, Heckel DG, Mohagheghi H, Petschenka G, Ober D. Flavin-dependent monooxygenases as a detoxification mechanism in insects: new insights from the arctiids (lepidoptera). PLoS One 2010; 5:e10435. [PMID: 20454663 PMCID: PMC2862711 DOI: 10.1371/journal.pone.0010435] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Accepted: 04/07/2010] [Indexed: 11/19/2022] Open
Abstract
Insects experience a wide array of chemical pressures from plant allelochemicals and pesticides and have developed several effective counterstrategies to cope with such toxins. Among these, cytochrome P450 monooxygenases are crucial in plant-insect interactions. Flavin-dependent monooxygenases (FMOs) seem not to play a central role in xenobiotic detoxification in insects, in contrast to mammals. However, the previously identified senecionine N-oxygenase of the arctiid moth Tyria jacobaeae (Lepidoptera) indicates that FMOs have been recruited during the adaptation of this insect to plants that accumulate toxic pyrrolizidine alkaloids. Identification of related FMO-like sequences of various arctiids and other Lepidoptera and their combination with expressed sequence tag (EST) data and sequences emerging from the Bombyx mori genome project show that FMOs in Lepidoptera form a gene family with three members (FMO1 to FMO3). Phylogenetic analyses suggest that FMO3 is only distantly related to lepidopteran FMO1 and FMO2 that originated from a more recent gene duplication event. Within the FMO1 gene cluster, an additional gene duplication early in the arctiid lineage provided the basis for the evolution of the highly specific biochemical, physiological, and behavioral adaptations of these butterflies to pyrrolizidine-alkaloid-producing plants. The genes encoding pyrrolizidine-alkaloid-N-oxygenizing enzymes (PNOs) are transcribed in the fat body and the head of the larvae. An N-terminal signal peptide mediates the transport of the soluble proteins into the hemolymph where PNOs efficiently convert pro-toxic pyrrolizidine alkaloids into their non-toxic N-oxide derivatives. Heterologous expression of a PNO of the generalist arctiid Grammia geneura produced an N-oxygenizing enzyme that shows noticeably expanded substrate specificity compared with the related enzyme of the specialist Tyria jacobaeae. The data about the evolution of FMOs within lepidopteran insects and the functional characterization of a further member of this enzyme family shed light on this almost uncharacterized detoxification system in insects.
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Affiliation(s)
- Sven Sehlmeyer
- Institute for Pharmaceutical Biology, TU Braunschweig, Braunschweig, Germany
| | - Linzhu Wang
- Biochemical Ecology and Molecular Evolution, Botanical Institute and Botanical Garden, Christian-Albrechts-Universität, Kiel, Germany
| | - Dorothee Langel
- Biochemical Ecology and Molecular Evolution, Botanical Institute and Botanical Garden, Christian-Albrechts-Universität, Kiel, Germany
| | - David G. Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology, Jena, Germany
| | - Hoda Mohagheghi
- Institute for Pharmaceutical Biology, TU Braunschweig, Braunschweig, Germany
| | - Georg Petschenka
- Molecular Evolution, Institute of Zoology, University of Hamburg, Hamburg, Germany
| | - Dietrich Ober
- Biochemical Ecology and Molecular Evolution, Botanical Institute and Botanical Garden, Christian-Albrechts-Universität, Kiel, Germany
- * E-mail:
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Jiang HB, Tang PA, Xu YQ, An FM, Wang JJ. Molecular characterization of two novel deltamethrin-inducible P450 genes from Liposcelis bostrychophila Badonnel (Psocoptera: Liposcelididae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2010; 74:17-37. [PMID: 20301224 DOI: 10.1002/arch.20358] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Two novel P450 genes, CYP6CE1 and CYP6CE2 (GenBank accession number: EF421245 and EF421246), were cloned and characterized from psocid, Liposcelis bostrychophila. CYP6CE1 and CYP6CE2 contain open reading frames of 1,581 and 1,563 nucleotides that encode 527 and 521 amino acid residues, respectively. The putative proteins of CYP6CE1 and CYP6CE2 show predicted molecular weights of 60.76 and 59.83 kDa with a theoretical pI of 8.58 and 8.78, respectively. CYP6CE1 and CYP6CE2 share 74% identity with each other, and the deduced proteins are typical microsomal P450s sharing signature sequences with other insect CYP6 P450s. Both CYP6CE1 and CYP6CE2 share the closest identities with Hodotermopsis sjoestedti CYP6AM1 at 48% among the published sequences. Phylogenetic analysis showed a closer relationship of CYP6CE1 and CYP6CE2 with CYP6 members of other insects than with those from other families. Quantitative real-time RT-PCR showed that both CYP6CE1 and CYP6CE2 are expressed at all developmental stages tested. Interestingly, CYP6CE2 transcripts decreased from the highest in 1st nymph to the lowest in adults, which seemed to suggest developmental regulation. However, neither CYP6CE1 nor CYP6CE2 were stage specific. The CYP6CE1 and CYP6CE2 transcripts in adults increased significantly after deltamethrin exposure. Recombinant protein expression studies are needed to determine the real functions of these proteins.
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Affiliation(s)
- Hong-Bo Jiang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, P. R. China
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38
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Poupardin R, Riaz MA, Vontas J, David JP, Reynaud S. Transcription profiling of eleven cytochrome P450s potentially involved in xenobiotic metabolism in the mosquito Aedes aegypti. INSECT MOLECULAR BIOLOGY 2010; 19:185-193. [PMID: 20041961 DOI: 10.1111/j.1365-2583.2009.00967.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Transcription profiles of 11 Aedes aegypti P450 genes from CYP6 and CYP9 subfamilies potentially involved in xenobiotic metabolism were investigated. Many genes were preferentially transcribed in tissues classically involved in xenobiotic metabolism including midgut and Malpighian tubules. Life-stage transcription profiling revealed important variations amongst larvae, pupae, and adult males and females. Exposure of mosquito larvae to sub-lethal doses of three xenobiotics induced the transcription of several genes with an induction peak after 48 to 72 h exposure. Several CYP genes were also induced by oxidative stress and one gene strongly responded to 20-hydroxyecdysone. Overall, this study revealed that these P450s show different transcription profiles according to xenobiotic exposures, life stages or sex. Their putative chemoprotective functions are discussed.
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Affiliation(s)
- R Poupardin
- Laboratoire d'Ecologie Alpine (LECA, UMR 5553 CNRS-Université) Grenoble, France
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39
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Poupardin R, Reynaud S, Strode C, Ranson H, Vontas J, David JP. Cross-induction of detoxification genes by environmental xenobiotics and insecticides in the mosquito Aedes aegypti: impact on larval tolerance to chemical insecticides. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2008; 38:540-551. [PMID: 18405832 DOI: 10.1016/j.ibmb.2008.01.004] [Citation(s) in RCA: 197] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2007] [Revised: 01/14/2008] [Accepted: 01/19/2008] [Indexed: 05/26/2023]
Abstract
The effect of exposure of Aedes aegypti larvae to sub-lethal doses of the pyrethroid insecticide permethrin, the organophosphate temephos, the herbicide atrazine, the polycyclic aromatic hydrocarbon fluoranthene and the heavy metal copper on their subsequent tolerance to insecticides, detoxification enzyme activities and expression of detoxification genes was investigated. Bioassays revealed a moderate increase in larval tolerance to permethrin following exposure to fluoranthene and copper while larval tolerance to temephos increased moderately after exposure to atrazine, copper and permethrin. Cytochrome P450 monooxygenases activities were induced in larvae exposed to permethrin, fluoranthene and copper while glutathione S-transferase activities were induced after exposure to fluoranthene and repressed after exposure to copper. Microarray screening of the expression patterns of all detoxification genes following exposure to each xenobiotic with the Aedes Detox Chip identified multiple genes induced by xenobiotics and insecticides. Further expression studies using real-time quantitative PCR confirmed the induction of multiple CYP genes and one carboxylesterase gene by insecticides and xenobiotics. Overall, this study reveals the potential of xenobiotics found in polluted mosquito breeding sites to affect their tolerance to insecticides, possibly through the cross-induction of particular detoxification genes. Molecular mechanisms involved and impact on mosquito control strategies are discussed.
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Affiliation(s)
- Rodolphe Poupardin
- Laboratoire d'Ecologie Alpine, UMR CNRS-Université Joseph Fourier 5553, Equipe Perturbations Environnementales et Xénobiotiques, Domaine Universitaire de Saint-Martin d'Hères. 2233, rue de la piscine Bât D Biologie, BP 53, 38041 Grenoble Cedex 9, France
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40
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Yang J, McCart C, Woods DJ, Terhzaz S, Greenwood KG, ffrench-Constant RH, Dow JAT. A Drosophila systems approach to xenobiotic metabolism. Physiol Genomics 2007; 30:223-31. [PMID: 17488889 DOI: 10.1152/physiolgenomics.00018.2007] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Insecticide resistance is a major problem for both medicine and agriculture and is frequently associated with overexpression of metabolic enzymes that catalyze the breakdown of pesticides, leading to broad-spectrum resistance. However, the insect tissues within which these metabolic enzymes normally reside remain unclear. Microarray analysis of nine adult tissues from Drosophila melanogaster reveals that cytochrome P-450s and glutathione-S-transferases show highly tissue-specific expression patterns; most were confined to one or more epithelial tissues, and half showed dominant expression in a single tissue. The particular detoxifying enzymes encountered by a xenobiotic thus depend critically on the route of administration. In particular, known insecticide metabolism genes are highly enriched in insect Malpighian (renal) tubules, implicating them in xenobiotic metabolism. The tubules thus display, with the fat body, roles analogous to the vertebrate liver and immune system, as well as its acknowledged renal function. To illustrate this, when levels of a single gene, Cyp6g1, were manipulated in just the Malpighian tubules of adult Drosophila, the survival of the whole insect after 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT) challenge was altered, whereas corresponding manipulations in the nervous system or the fat body were without effect. This shows that, although detoxification enzymes are widely distributed, baseline protection against DDT resides primarily in the insect excretory system, corresponding to less than 0.1% of the mass of the organism.
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Affiliation(s)
- Jingli Yang
- Division of Molecular Genetics, University of Glasgow, Glasgow, United Kingdom
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41
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Després L, David JP, Gallet C. The evolutionary ecology of insect resistance to plant chemicals. Trends Ecol Evol 2007; 22:298-307. [PMID: 17324485 DOI: 10.1016/j.tree.2007.02.010] [Citation(s) in RCA: 494] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2006] [Revised: 01/30/2007] [Accepted: 02/15/2007] [Indexed: 11/23/2022]
Abstract
Understanding the diversity of insect responses to chemical pressures (e.g. plant allelochemicals and pesticides) in their local ecological context represents a key challenge in developing durable pest control strategies. To what extent do the resistance mechanisms evolved by insects to deal with the chemical defences of plants differ from those that have evolved to resist insecticides? Here, we review recent advances in our understanding of insect resistance to plant chemicals, with a special emphasis on their underlying molecular basis, evaluate costs associated with each resistance trait, and discuss the ecological and evolutionary significance of these findings.
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Affiliation(s)
- Laurence Després
- Laboratoire d'Ecologie Alpine, LECA UMR CNRS 5553, Université Joseph Fourier, BP 53 38041, Grenoble Cedex 09, France.
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42
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Yang Z, Yang H, He G. Cloning and characterization of two cytochrome P450 CYP6AX1 and CYP6AY1 cDNAs from Nilaparvata lugens Stål (Homoptera: Delphacidae). ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2007; 64:88-99. [PMID: 17212353 DOI: 10.1002/arch.20162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Two full-length P450 cDNAs, CYP6AX1 and CYP6AY1, were cloned from the brown planthopper Nilaparvata lugens Stål (Homoptera: Delphacidae). Both CYP6AX1 and CYP6AY1 are typical microsomal P450s and their deduced amino acid sequences share common characteristics with other members of the insect P450 CYP6 family. CYP6AX1 and CYP6AY1 show the highest percent identity (36%) of amino acid to each other; both of them have 31-33% amino acid identity with CYP6B1 from Papilio polyxenes (Lepidoptera: Papilionidae), CYP6B4 from Papilio glaucus (Lepidoptera: Papilionidae), and CYP6B8 from Helicoverpa zea (Lepidoptera: Noctuidae). Phylogenetic analysis showed the clustering of CYP6AX1 and CYP6AY1 was in the clade including CYP6AE1 from Depressaria pastinacella (Lepidoptera: Oecophoridae) and the CYP6B family members from Helicoverpa and Papilio species. Northern blot analysis revealed that both of the P450s were induced by the resistant rice variety B5 (Oryza sativa L), and CYP6AY1 was expressed at a higher level than CYP6AX1. The results suggest that more than one P450s are likely involved in metabolism of rice allelochemicals and that they are possibly important components in adaptation of Nilaparvata lugens to host rice. Arch. Insect Biochem.
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Affiliation(s)
- Zhifan Yang
- College of Life Sciences, Hubei University, Wuhan, People's Republic of China
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43
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Grubor VD, Heckel DG. Evaluation of the role of CYP6B cytochrome P450s in pyrethroid resistant Australian Helicoverpa armigera. INSECT MOLECULAR BIOLOGY 2007; 16:15-23. [PMID: 17257205 DOI: 10.1111/j.1365-2583.2006.00697.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The AN02 strain of Helicoverpa armigera from eastern Australia exhibits 50-fold, PBO-suppressible resistance to the pyrethroid insecticide fenvalerate. The semidominant resistance gene RFen1 was previously mapped to AFLP Linkage Group 13. In evaluating the cytochrome P450 genes CYP6B7, CYP6B6, and CYP6B2 as candidates for RFen1, we found that they occur in a tandem array in the genome, next to the gene encoding the para-type sodium channel; the target of pyrethroid insecticides. We mapped these genes to AFLP Linkage Group 14, thus rejecting mutations within the P450 cluster or para as candidates for RFen1. RFen1 genotypes produced slightly different mRNA levels of the three P450s, but the differences were too small to convincingly account for resistance. We conclude that even if one or more of these P450s metabolize fenvalerate, they are unlikely to be responsible for the resistance in AN02.
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Affiliation(s)
- Vladimir D Grubor
- CESAR, Department of Genetics, University of Melbourne, Parkville, Victoria 3010, Australia
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44
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Li X, Schuler MA, Berenbaum MR. Molecular mechanisms of metabolic resistance to synthetic and natural xenobiotics. ANNUAL REVIEW OF ENTOMOLOGY 2007; 52:231-53. [PMID: 16925478 DOI: 10.1146/annurev.ento.51.110104.151104] [Citation(s) in RCA: 1227] [Impact Index Per Article: 72.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Xenobiotic resistance in insects has evolved predominantly by increasing the metabolic capability of detoxificative systems and/or reducing xenobiotic target site sensitivity. In contrast to the limited range of nucleotide changes that lead to target site insensitivity, many molecular mechanisms lead to enhancements in xenobiotic metabolism. The genomic changes that lead to amplification, overexpression, and coding sequence variation in the three major groups of genes encoding metabolic enzymes, i.e., cytochrome P450 monooxygenases (P450s), esterases, and glutathione-S-transferases (GSTs), are the focus of this review. A substantial number of the adaptive genomic changes associated with insecticide resistance that have been characterized to date are transposon mediated. Several lines of evidence suggest that P450 genes involved in insecticide resistance, and perhaps insecticide detoxification genes in general, may share an evolutionary association with genes involved in allelochemical metabolism. Differences in the selective regime imposed by allelochemicals and insecticides may account for the relative importance of regulatory or structural mutations in conferring resistance.
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Affiliation(s)
- Xianchun Li
- Department of Entomology and BIO5, University of Arizona, Tucson, Arizona 85721, USA.
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45
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Willoughby L, Chung H, Lumb C, Robin C, Batterham P, Daborn PJ. A comparison of Drosophila melanogaster detoxification gene induction responses for six insecticides, caffeine and phenobarbital. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2006; 36:934-42. [PMID: 17098168 DOI: 10.1016/j.ibmb.2006.09.004] [Citation(s) in RCA: 112] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2006] [Revised: 09/12/2006] [Accepted: 09/12/2006] [Indexed: 05/12/2023]
Abstract
Modifications of metabolic pathways are important in insecticide resistance evolution. Mutations leading to changes in expression levels or substrate specificities of cytochrome P450 (P450), glutathione-S-transferase (GST) and esterase genes have been linked to many cases of resistance with the responsible enzyme shown to utilize the insecticide as a substrate. Many studies show that the substrates of enzymes are capable of inducing the expression of those enzymes. We investigated if this was the case for insecticides and the enzymes responsible for their metabolism. The induction responses for P450s, GSTs and esterases to six different insecticides were investigated using a custom designed microarray in Drosophila melanogaster. Even though these gene families can all contribute to insecticide resistance, their induction responses when exposed to insecticides are minimal. The insecticides spinosad, diazinon, nitenpyram, lufenuron and dicyclanil did not induce any P450, GST or esterase gene expression after a short exposure to high lethal concentrations of insecticide. DDT elicited the low-level induction of one GST and one P450. These results are in contrast to induction responses we observed for the natural plant compound caffeine and the barbituate drug phenobarbital, both of which highly induced a number of P450 and GST genes under the same short exposure regime. Our results indicate that, under the insecticide exposure conditions we used, constitutive over-expression of metabolic genes play more of a role in insect survival than induction of members of these gene families.
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Affiliation(s)
- Lee Willoughby
- Centre for Environmental Stress and Adaptation Research (CESAR), Department of Genetics, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Vic. 3010, Australia
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46
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Wen Z, Rupasinghe S, Niu G, Berenbaum MR, Schuler MA. CYP6B1 and CYP6B3 of the Black Swallowtail (Papilio polyxenes): Adaptive Evolution through Subfunctionalization. Mol Biol Evol 2006; 23:2434-43. [PMID: 16984951 DOI: 10.1093/molbev/msl118] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Gene duplication provides essential material for functional divergence of proteins and hence allows organisms to adapt to changing environments. Following duplication events, redundant paralogs may undergo different evolutionary paths via processes known as nonfunctionalization, neofunctionalization, or subfunctionalization. Studies of adaptive evolution at the molecular level have progressed rapidly by computationally analyzing nucleotide substitution patterns but such studies are limited by the absence of information relating to alterations of function of the encoded enzymes. In this respect, evolution of the Papilio polyxenes cytochrome P450 monooxygenases (P450s) responsible for the adaptation of this insect to furanocoumarin-containing host plants provides an excellent model for elucidating the evolutionary fate of duplicated genes. Evidence from sequence and functional analysis in combination with molecular modeling indicates that the paralogous CYP6B1 and CYP6B3 genes in P. polyxenes have probably evolved via subfunctionalization after the duplication event by which they arose. Both enzymes have been under independent purifying selection as evidenced by the low dN/dS ratio in both the coding region and substrate recognition sites. Both enzymes have maintained their ability to metabolize linear and angular furanocoumarins albeit at different efficiencies. Comparisons of molecular models developed for the CYP6B3 and CYP6B1 proteins highlight differences in their binding modes that account for their different activities toward linear and angular furanocoumarins. That P. polyxenes maintains these 2 furanocoumarin-metabolizing loci with somewhat different activities and expression patterns provides this species with the potential to acquire P450s with novel functions while maintaining those most critical to its exclusive feeding on its current range of host plants.
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Affiliation(s)
- Zhimou Wen
- Department of Cell and Developmental Biology, University of Illinois, IL, USA
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47
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David JP, Boyer S, Mesneau A, Ball A, Ranson H, Dauphin-Villemant C. Involvement of cytochrome P450 monooxygenases in the response of mosquito larvae to dietary plant xenobiotics. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2006; 36:410-20. [PMID: 16651188 DOI: 10.1016/j.ibmb.2006.02.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2005] [Revised: 02/27/2006] [Accepted: 02/28/2006] [Indexed: 05/08/2023]
Abstract
The response of mosquito larvae to plant toxins found in their breeding sites was investigated by using Aedes aegypti larvae and toxic arborescent leaf litter as experimental models. The relation between larval tolerance to toxic leaf litter and cytochrome P450 monooxygenases (P450s) was examined at the toxicological, biochemical and molecular levels. Larvae pre-exposed to toxic leaf litter show a higher tolerance to those xenobiotics together with a strong increase in P450 activity levels. This enzymatic response is both time- and dose-dependent. The use of degenerate primers from various P450 genes (CYPs) allowed us to isolate 16 new CYP genes belonging to CYP4, CYP6 and CYP9 families. Expression studies revealed a 2.3-fold over-expression of 1 CYP gene (CYP6AL1) after larval pre-exposure to toxic leaf litter, this gene being expressed at a high level in late larval and pupal stages and in fat bodies and midgut. The CYP6AL1 protein has a high level of identity with other insect's CYPs involved in xenobiotic detoxification. The role of CYP genes in tolerance to natural xenobiotics and the importance of such adaptive responses in the capacity of mosquitoes to colonize new habitats and to develop insecticide resistance mechanisms are discussed.
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Affiliation(s)
- J P David
- Laboratoire d'Ecologie Alpine (LECA) UMR 5553, Bâtiment D, rue de la piscine, Université Joseph Fourier, BP53, 38041 Grenoble cedex 9, France.
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48
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Wen Z, Berenbaum MR, Schuler MA. Inhibition of CYP6B1-mediated detoxification of xanthotoxin by plant allelochemicals in the black swallowtail (Papilio polyxenes). J Chem Ecol 2006; 32:507-22. [PMID: 16570215 DOI: 10.1007/s10886-005-9014-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2005] [Revised: 09/12/2005] [Accepted: 10/21/2005] [Indexed: 11/25/2022]
Abstract
The structural and biosynthetic diversity of allelochemicals in plants is thought to arise from selection for additive toxicity as a consequence of toxin mixture or for enhanced toxicity as a result of synergism. In order to understand how insects cope with this type of plant defense, we tested the effects of some allelochemicals in host plants of the black swallowtail Papilio polyxenes on the xanthotoxin-metabolic activity of CYP6B1, the principal enzyme responsible for the detoxification of furanocoumarins in this caterpillar. Additionally, the effects of some synthetic compounds not normally encountered by P. polyxenes on CYP6B1 were tested. These studies demonstrate that the integrity of furanocoumarin structure is important for competitive binding to the active site of CYP6B1, even though the carbonyl group on the pyranone ring apparently does not affect its inhibitory capacity, as in the case of furanochromones. Angular furanocoumarins are generally less phototoxic to many organisms than linear furanocoumarins due to their reduced capacity for cross-linking DNA strands, yet they are more toxic than linear furanocoumarins to black swallowtail larvae. This enhanced toxicity in vivo may be due to the ability of angular furanocoumarins to bind to the active site of CYP6B1 without being rapidly metabolized. This binding reduces the availability of CYP6B1 to metabolize other linear furanocoumarins. The structure-activity relationships for methylenedioxyphenyl compounds, flavonoids, imidazole, and imidazole derivatives are also discussed in light of their capacity to inhibit the xanthotoxin-metabolic activity of CYP6B1.
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Affiliation(s)
- Zhimou Wen
- Department of Cell and Developmental Biology, University of Illinois, Urbana, 61801, USA
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49
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Jensen HR, Scott IM, Sims S, Trudeau VL, Arnason JT. Gene expression profiles of Drosophila melanogaster exposed to an insecticidal extract of Piper nigrum. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2006; 54:1289-95. [PMID: 16478250 DOI: 10.1021/jf052046n] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Black pepper, Piper nigrum L. (Piperaceae), has insecticidal properties and could potentially be utilized as an alternative to synthetic insecticides. Piperine extracted from P. nigrum has a biphasic effect upon cytochrome P450 monooxygenase activity with an initial suppression followed by induction. In this study, an ethyl acetate extract of P. nigrum seeds was tested for insecticidal activity toward adult Musca domestica and Drosophila melanogaster. The effect of this same P. nigrum extract upon differential gene expression in D. melanogaster was investigated using cDNA microarray analysis of 7380 genes. Treatment of D. melanogaster with P. nigrum extract led to a greater than 2-fold upregulation of transcription of the cytochrome P450 phase I metabolism genes Cyp 6a8, Cyp 9b2, and Cyp 12d1 as well as the glutathione-S-transferase phase II metabolism gene Gst-S1. These data suggests a complex effect of P. nigrum upon toxin metabolism.
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Affiliation(s)
- Helen R Jensen
- Department of Biology, University of Ottawa, Ottawa-Carleton Institute of Biology, 30 Marie-Curie Street, Ottawa, Ontario K1N 6N5, Canada
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50
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Brown RP, McDonnell CM, Berenbaum MR, Schuler MA. Regulation of an insect cytochrome P450 monooxygenase gene (CYP6B1) by aryl hydrocarbon and xanthotoxin response cascades. Gene 2005; 358:39-52. [PMID: 16099607 DOI: 10.1016/j.gene.2005.05.026] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2005] [Revised: 02/28/2005] [Accepted: 05/10/2005] [Indexed: 11/18/2022]
Abstract
Many organisms respond to toxic compounds in their environment by inducing regulatory networks controlling the expression and activity of cytochrome P450 monooxygenase (P450s) detoxificative enzymes. In particular, black swallowtail (Papilio polyxenes) caterpillars respond to xanthotoxin, a toxic phytochemical in their hostplants, by activating transcription of the CYP6B1 promoter via several regions located within 150 nt of the transcription initiation site. One such element is the xenobiotic response element to xanthotoxin (XRE-Xan) that lies upstream of consensus XRE-AhR (xenobiotic response element to the aryl hydrocarbon receptor) and OCT-1 (octamer-1 binding site) element known to be utilized in mammalian aryl hydrocarbon response cascades. Two-plasmid transfections conducted in Sf9 cells have indicated that XRE-Xan, XRE-AhR and a number of other proximal elements, but not OCT-1, are critical for basal as well as xanthotoxin- and benzo[alpha]pyrene-induced transcription of the CYP6B1 promoter. Four-plasmid transfections with vectors co-expressing the spineless (Ss) and tango (Tgo) proteins, the Drosophila melanogaster homologues of mammalian AhR and ARNT, have indicated that these proteins enhance basal expression of the CYP6B1 promoter but not the magnitude of its xanthotoxin and benzo[alpha]pyrene induction. Based on these results, we propose that these Drosophila transcription factors modulate basal expression of this promoter in a ligand-independent manner and attenuate its subsequent responses to planar aryl hydrocarbons (benzo[alpha]pyrene) and allelochemicals (xanthotoxin).
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Affiliation(s)
- Rebecca Petersen Brown
- Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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