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Démares F, Gibert L, Lapeyre B, Creusot P, Renault D, Proffit M. Ozone exposure induces metabolic stress and olfactory memory disturbance in honey bees. CHEMOSPHERE 2024; 346:140647. [PMID: 37949186 DOI: 10.1016/j.chemosphere.2023.140647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/04/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Human activities, urbanization, and industrialization contribute to pollution that affects climate and air quality. A main atmospheric pollutant, the tropospheric ozone (O3), can damage living organisms by generating oxidative radicals, causing respiratory problems in humans and reducing yields and growth in plants. Exposure to high concentrations of O3 can result in oxidative stress in plants and animals, eventually leading to substantial ecological consequences. Plants produce volatile organic compounds (VOCs) emitted in the environment and detected by pollinators (mainly by their antennae), foraging for nutritious resources. Several pollinators, including honey bees, recognize and discriminate flowers through olfactory cues and memory. Exposure to different concentrations of O3 was shown to alter the emission of floral VOCs by plants as well as their lifetime in the atmosphere, potentially impacting plant-pollinator interactions. In this report, we assessed the impacts of exposure to field-realistic concentrations of O3 on honey bees' antennal response to floral VOCs, on their olfactory recall and discriminative capacity and on their antioxidant responses. Antennal activity is altered depending on VOCs structure and O3 concentrations. During the behavioral tests, we first check consistency between olfactory learning rates and memory scores after 15 min. Then bees exposed to 120 and 200 ppb of ozone do not exert specific recall responses with rewarded VOCs 90 min after learning, compared to controls whose specific recall responses were consistent between time points. We also report for the first time in honey bees how the superoxide dismutase enzyme, an antioxidant defense against oxidative stress, saw its enzymatic activity rate decreases after exposure to 80 ppb of ozone. This work tends to demonstrate how hurtful can be the impact of air pollutants upon pollinators themselves and how this type of pollution needs to be addressed in future studies aiming at characterizing plant-insect interactions more accurately.
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Affiliation(s)
- Fabien Démares
- Centre D'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France.
| | - Laëtitia Gibert
- Centre D'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Benoit Lapeyre
- Centre D'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Pierre Creusot
- Centre D'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - David Renault
- Écosystèmes, Biodiversité, Évolution (EcoBio) CNRS - UMR 6553, Université de Rennes 1, 35042 Rennes, France
| | - Magali Proffit
- Centre D'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
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2
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Wang XZ, Chen JS, Wang W, Niu DB, Wu HZ, Palli SR, Cao HQ, Sheng CW. Knockdown of the glutamate-gated chloride channel gene decreases emamectin benzoate susceptibility in the fall armyworm, Spodoptera frugiperda. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 196:105636. [PMID: 37945267 DOI: 10.1016/j.pestbp.2023.105636] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/23/2023] [Accepted: 09/30/2023] [Indexed: 11/12/2023]
Abstract
Emamectin benzoate (EB), a derivative of avermectin, is the primary insecticide used to control the fall armyworm (FAW) in China. However, the specific molecular targets of EB against FAW remain unclear. In this study, we cloned the glutamate-gated chloride channel (GluCl) gene, which is known to be a primary molecular target for avermectin. We first investigated the transcript levels of SfGluCl in FAW and found that the expression level of SfGluCl in the head and nerve cord was significantly higher than that in other tissues. Furthermore, we found that the expression level of SfGluCl was significantly higher in eggs than that in other developmental stages, including larvae, pupae, and adults. Additionally, we identified three variable splice forms of SfGluCl in exons 3 and 9 and found that their splice frequencies remained unaffected by treatment with the LC50 of EB. RNAi mediated knockdown of SfGluCl showed a significant reduction of 42% and 65% after 48 and 72 h of dsRNA feeding, respectively. Importantly, knockdown of SfGluCl sifgnificantly reduced LC50 and LC90 EB treatment induced mortality of FAW larvae by 15% and 44%, respectively, compared to the control group feeding by dsEGFP. In contrast, there were no significant changes in the mortality of FAW larvae treated with the control insecticides chlorantraniliprole and spinetoram. Finally, molecular docking simulations revealed that EB bound to the large amino-terminal extracellular domain of SfGluCl by forming five hydrogen bonds, two alkyl hydrophobic interactions and one salt bridge. These findings strongly suggest that GluCl may serve as one of the molecular targets of EB in FAW, shedding light on the mode of action of this important insecticide.
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Affiliation(s)
- Xian-Zheng Wang
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Jia-Sheng Chen
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China; Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY 40546, USA
| | - Wei Wang
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Duo-Bang Niu
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Hui-Zi Wu
- Guizhou Provincial Tobacco Company Zunyi Branch, Zunyi 563000, PR China
| | - Subba Reddy Palli
- Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY 40546, USA
| | - Hai-Qun Cao
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China
| | - Cheng-Wang Sheng
- Anhui Province Engineering Laboratory for Green Pesticide Development and Application, School of Plant Protection, Anhui Agricultural University, Hefei 230036, PR China.
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3
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Qian K, Jiang C, Guan D, Zhuang A, Meng X, Wang J. Characterization of Glutamate-Gated Chloride Channel in Tribolium castaneum. INSECTS 2023; 14:580. [PMID: 37504587 PMCID: PMC10380907 DOI: 10.3390/insects14070580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/21/2023] [Accepted: 06/24/2023] [Indexed: 07/29/2023]
Abstract
The glutamate-gated chloride channels (GluCls) play essential roles in signal transduction by regulating fast inhibitory synaptic transmission in the nervous system of invertebrates. While there is only one GluCl subunit in the insect, the diversity of insect GluCls is broadened by alternative splicing. In the present study, three TcGluCl variant genes were cloned from the red flour beetle Tribolium castaneum. Analysis of the characteristics of TcGluCls including sequence features, genomic structures, and alternative splicing revealed that TcGluCls had the typical structural features of GluCls and showed high homologies with the GluCls from other insect orders. The TcGluCl-encoding gene consists of nine exons and three variants (TcGluCl-3a, TcGluCl-3b, and TcGluCl-3c) were generated by the alternative splicing of exon 3, which was a highly conserved alternative splicing site in insect GluCls. Homology modeling of TcGluCl-3a showed that the exon 3 coding protein located at the N-terminal extracellular domain, and there were no steric clashes encountered between the exon 3 coding region and ivermectin/glutamate binding pocket, which indicated that the alternative splicing of exon 3 might have no impact on the binding of GluCls to glutamate and insecticide. In addition to the head tissue, TcGluCl-3a and TcGluCl-3c also had high expressions in the ovary and testis of T. castaneum, whereas TcGluCl-3b showed high expression in the midgut, suggesting the diverse physiological functions of TcGluCl variants in T. castaneum. The total TcGluCl and three variants showed the highest expression levels in the early stage larvae. The expressions of TcGluCl, TcGluCl-3b, and TcGluCl-3c were significantly increased from the late-stage larvae to the early stage pupae and indicated that the TcGluCl might be involved in the growth and development of T. castaneum. These results are helpful to further understand the molecular characteristics of insect GluCls and provide foundations for studying the specific function of the GluCl variant.
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Affiliation(s)
- Kun Qian
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Chengyun Jiang
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Daojie Guan
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Anxiang Zhuang
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China
| | - Xiangkun Meng
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China
| | - Jianjun Wang
- College of Plant Protection, Yangzhou University, Yangzhou 225009, China
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4
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Démares F, Gibert L, Creusot P, Lapeyre B, Proffit M. Acute ozone exposure impairs detection of floral odor, learning, and memory of honey bees, through olfactory generalization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 827:154342. [PMID: 35257776 DOI: 10.1016/j.scitotenv.2022.154342] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 03/02/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Air pollution stemming from human activities affects the environment in which plant and animal species live and interact. Similar to primary air pollutants which are emitted, secondary air pollutants, such as tropospheric ozone (O3) formed from nitrogen oxides, are also harmful to human health and plant physiology. Yet, few reports studied the effects of O3 on pollinators' physiology, despite that this pollutant, with its high oxidative potential, likely affects pollinators behaviors, especially the perception of signals they rely on to navigate their environment. Volatile Organic Compounds (VOCs) released by plants are used as signals by different animals. For pollination services, VOCs attract different insects to the flowers and strengthen these interactions. Here, we used the honey bee Apis mellifera as a model to characterize the effects of acute exposure to different realistic mixing ratios of O3 (80-, 120-, and 200-ppb) on two crucial aspects: first, how exposed honey bees detect VOCs; and second, how O3 affects these pollinators' learning and memory processes. With electroantennogram (EAG) recordings, we showed that increasing O3 mixing ratios had a biphasic effect: an initial 25% decrease of the antennal activity when bees were tested directly after exposure (O3 direct effect), followed by a 25% increase in activity and response when bees were allowed a two-hour rest after exposure (O3 delayed effect). In parallel, during olfactory conditioning, increasing O3 mixing ratios in both exposure protocols scarcely affected olfactory learning, followed by a decrease in recall of learned odors and an increase of response to new odors, leading to a higher generalization rate (i.e., discrimination impairment). These results suggest a link between O3-related oxidative stress and olfactory coding disturbance in the honey bee brain. If ozone affects the pollinators' olfaction, foraging behaviors may be modified, in addition with a possible long-term harmful effect on pollination services.
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Affiliation(s)
- Fabien Démares
- Centre d'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France.
| | - Laëtitia Gibert
- Centre d'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Pierre Creusot
- Centre d'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Benoit Lapeyre
- Centre d'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
| | - Magali Proffit
- Centre d'Écologie Fonctionnelle et Évolutive (CEFE), Université de Montpellier, CNRS, EPHE, IRD, 34293 Montpellier, France
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5
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Zhang D, Wei X, Liu Z, Wu X, Bao C, Sun Y, Su N, Cui J. Transcriptome Analysis Reveals the Molecular Mechanism of GABA Accumulation during Quinoa ( Chenopodium quinoa Willd.) Germination. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12171-12186. [PMID: 34610747 DOI: 10.1021/acs.jafc.1c02933] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Quinoa (Chenopodium quinoa Willd.) with a history of 5000 years as food is extremely rich in nutrients and bioactive compounds, including γ-aminobutyric acid (GABA), a natural four-carbon non-protein amino acid with great benefits to human health. In quinoa, GABA generally increases with the germination time, but the underlying molecular mechanism is unclear. Here, we found that the GABA content in quinoa varied significantly among 25 varieties using an automatic amino acid analyzer. Next, six varieties (three low-GABA and three high-GABA varieties) were used for further analyses. The content of GABA in six varieties all showed an increasing trend after germination. In addition, Pearson's correlation analysis showed that the changes in GABA content were closely related to the transcript level or enzyme activity of three key enzymes including glutamate decarboxylase (GAD), GABA transaminase (GABA-T), and succinate-semialdehyde dehydrogenase (SSADH) in the GABA shunt, especially GAD. Based on RNA-sequencing analysis, eight GAD genes, two GABA-T genes, one SSADH gene, nine polyamine oxidase (PAO) genes, five diamine oxidase (DAO) genes, four 4-aminobutyraldehyde dehydrogenase (BADH) genes, and three thermospermine synthase ACAULIS5 (ACL5) genes were identified. Among these, CqGAD8 and CqGABA-T2 may make a greater contribution to GABA accumulation during quinoa germination.
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Affiliation(s)
- Derui Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiaonan Wei
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Ze Liu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiangyun Wu
- Shanxi Jiaqi Quinoa Dev Company Limited, Shuozhou 038600, China
| | - Changjian Bao
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuzhe Sun
- Nanjing Foreign Language School, Nanjing 210095, China
| | - Nana Su
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jin Cui
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
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6
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Raber J, Holden S, Sudhakar R, Hall R, Glaeser B, Lenarczyk M, Rockwell K, Nawarawong N, Sterrett J, Perez R, Leonard SW, Morré J, Choi J, Kronenberg A, Borg A, Kwok A, Stevens JF, Olsen CM, Willey JS, Bobe G, Baker J. Effects of 5-Ion Beam Irradiation and Hindlimb Unloading on Metabolic Pathways in Plasma and Brain of Behaviorally Tested WAG/Rij Rats. Front Physiol 2021; 12:746509. [PMID: 34646164 PMCID: PMC8503608 DOI: 10.3389/fphys.2021.746509] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/24/2021] [Indexed: 01/13/2023] Open
Abstract
A limitation of simulated space radiation studies is that radiation exposure is not the only environmental challenge astronauts face during missions. Therefore, we characterized behavioral and cognitive performance of male WAG/Rij rats 3 months after sham-irradiation or total body irradiation with a simplified 5-ion mixed beam exposure in the absence or presence of simulated weightlessness using hindlimb unloading (HU) alone. Six months following behavioral and cognitive testing or 9 months following sham-irradiation or total body irradiation, plasma and brain tissues (hippocampus and cortex) were processed to determine whether the behavioral and cognitive effects were associated with long-term alterations in metabolic pathways in plasma and brain. Sham HU, but not irradiated HU, rats were impaired in spatial habituation learning. Rats irradiated with 1.5 Gy showed increased depressive-like behaviors. This was seen in the absence but not presence of HU. Thus, HU has differential effects in sham-irradiated and irradiated animals and specific behavioral measures are associated with plasma levels of distinct metabolites 6 months later. The combined effects of HU and radiation on metabolic pathways in plasma and brain illustrate the complex interaction of environmental stressors and highlights the importance of assessing these interactions.
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Affiliation(s)
- Jacob Raber
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States.,Department of Neurology, Psychiatry, and Radiation Medicine, Division of Neuroscience, ONPRC, Oregon Health and Science University, Portland, OR, United States.,College of Pharmacy, Oregon State University, Corvallis, OR, United States
| | - Sarah Holden
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Reetesh Sudhakar
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Reed Hall
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Breanna Glaeser
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Marek Lenarczyk
- Radiation Biosciences Laboratory, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Kristen Rockwell
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Natalie Nawarawong
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jennifer Sterrett
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Ruby Perez
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Scott William Leonard
- Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Jeffrey Morré
- Mass Spectrometry Core, Oregon State University, Corvallis, OR, United States
| | - Jaewoo Choi
- Linus Pauling Institute, Oregon State University, Corvallis, OR, United States
| | - Amy Kronenberg
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Alexander Borg
- Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Andy Kwok
- Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Jan Frederik Stevens
- College of Pharmacy, Oregon State University, Corvallis, OR, United States.,Linus Pauling Institute, Oregon State University, Corvallis, OR, United States
| | - Christopher M Olsen
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jeffrey S Willey
- Department of Radiation Oncology, Wake Forest School of Medicine, Winston-Salem, NC, United States
| | - Gerd Bobe
- Linus Pauling Institute, Oregon State University, Corvallis, OR, United States.,Department of Animal Sciences, Oregon State University, Corvallis, OR, United States
| | - John Baker
- Department of Pharmacology and Toxicology, Neuroscience Center, Medical College of Wisconsin, Milwaukee, WI, United States.,Radiation Biosciences Laboratory, Medical College of Wisconsin, Milwaukee, WI, United States
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7
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Wang YY, Zhou N, Si YP, Bai ZY, Li M, Feng WS, Zheng XK. A UPLC-Q-TOF/MS-Based Metabolomics Study on the Effect of Corallodiscus flabellatus (Craib) B. L. Burtt Extract on Alzheimer's Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2021; 2021:8868690. [PMID: 34135987 PMCID: PMC8177975 DOI: 10.1155/2021/8868690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 05/16/2021] [Indexed: 11/24/2022]
Abstract
A UPLC-Q-TOF/MS-based metabolomics study was carried out to explore the intervening mechanism of Corallodiscus flabellatus (Craib) B. L. Burtt (CF) extract on Alzheimer's disease (AD). The AD model group consisted of senescence-accelerated mouse prone 8 (SAMP8) mice, and the control group consisted of senescence-accelerated mouse resistant 1 (SAMR1) mice. UPLC-Q-TOF/MS detection, multivariate statistical analysis, and pathway enrichment were jointly performed to research the change in metabolite profiling in the urine of AD mice. The result suggested that the metabolite profiling of SAMP8 mice significantly changed at the sixth month compared with SAMR1 mice of the same age, and the principal component analysis (PCA) score scatter plots of the CF group closely resembled those of the control and positive drug (huperzine A, HA) group. A total of 28 metabolites were considered potential biomarkers associated with the metabolism of beta-alanine, glycine, serine, threonine, cysteine, methionine, arginine, proline, and purines in AD mice. Furthermore, the CF group was clustered with the control and positive group and was clearly separated from the model group in the heat map. In conclusion, significant anti-AD effects were firstly observed in mice after treatment with the CF extract, and the urinary metabolomics approach assisted with dissecting the underlying mechanism.
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Affiliation(s)
- Yang-Yang Wang
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
- Key Laboratory of Chinese Materia Medica Ministry of Education, Heilongjiang University of Chinese Medicine, Harbin 150040, Heilongjiang, China
| | - Ning Zhou
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
| | - Yan-Po Si
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
| | - Zhi-Yao Bai
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
| | - Meng Li
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
| | - Wei-Sheng Feng
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
| | - Xiao-Ke Zheng
- Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou 450046, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, 156 Jinshui East Road, Zhengzhou 450046, China
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8
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Wang JD, Chen LF, Lin DJ, Zhang JS, Zhao JH, Xiao D, Wang R, Wang R, Gao SJ. Molecular cloning, characterization and functional analysis of GluCl from the oriental armyworm, Mythimna separata Walker. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 156:56-62. [PMID: 31027581 DOI: 10.1016/j.pestbp.2019.02.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/04/2019] [Accepted: 02/05/2019] [Indexed: 06/09/2023]
Abstract
Glutamate-gated chloride channels (GluCls) mediate inhibitory synaptic transmission in invertebrate nervous systems, and only one GluCl gene has been found in insects. Therefore, insect GluCls are one of the major targets of insecticides including avermectins. In the present study, a 1347 bp full-length cDNA encoding a 449-amino acid protein (named MsGluCl, GenBank ID: MK336885) was cloned from the oriental armyworm, Mythimna separata, and characterized two alternative splicing variants of MsGluCl. The protein shares 76.9-98.6% identity with other insect GluCl isoforms. Spatial and temporal expression analysis revealed that MsGluCl was highly expressed in the 3rd instar and adult head. Dietary ingestion of dsMsGluCl significantly reduced the mRNA level of MsGluCl and decreased abamectin mortality. Thus, our results reveal that MsGluCl could be the molecular target of abamectin and provide the basis for further understanding the resistance mechanism to abamectin in arthropods.
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Affiliation(s)
- Jin-da Wang
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China.
| | - Li-Fei Chen
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Dong-Jiang Lin
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Jia-Song Zhang
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Ji-Han Zhao
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - Da Xiao
- Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
| | - Ran Wang
- Institute of Plant and Environment Protection, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China.
| | - Rong Wang
- College of Forestry, Fujian Agricultural and Forestry University, Fuzhou 350002, China
| | - San-Ji Gao
- National Engineering Research Center of Sugarcane, Fujian Agricultural and Forestry University, Fuzhou 350002, China
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9
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Meng X, Miao L, Ge H, Yang X, Dong F, Xu X, Wu Z, Qian K, Wang J. Molecular characterization of glutamate-gated chloride channel and its possible roles in development and abamectin susceptibility in the rice stem borer, Chilo suppressalis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 155:72-80. [PMID: 30857629 DOI: 10.1016/j.pestbp.2019.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 01/15/2019] [Accepted: 01/20/2019] [Indexed: 06/09/2023]
Abstract
Glutamate-gated chloride channels (GluCls) mediate fast inhibitory neurotransmission in invertebrate nervous systems, and are of considerable interest in insecticide discovery. The full length cDNA encoding CsGluCl was cloned from the rice stem borer Chilo suppressalis (Walker). Multiple cDNA sequence alignment revealed three variants of CsGluCl generated by alternative splicing of exon 3 and exon 9. While all the transcripts were predominantly expressed in both nerve cord and brain, the expression patterns of these three variants differed among other tissues and developmental stages. Specifically, the expression level of CsGluCl C in cuticle was similar to that in nerve cord and brain, and was the predominant variant in late pupae and early adult stages. Both injection and oral delivery of dsGluCl significantly reduced the mRNA level of CsGluCl. Increased susceptibility to abamectin and reduced larvae growth and pupation rate were observed in dsGluCl-treated larvae. Thus, our results provide the evidence that in addition to act as the target of abamectin, GluCls also play important physiological roles in the development of insects.
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Affiliation(s)
- Xiangkun Meng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Lijun Miao
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Huichen Ge
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Xuemei Yang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Fan Dong
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Xin Xu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Zhaolu Wu
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Kun Qian
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Jianjun Wang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
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Meng X, Xie Z, Zhang N, Ji C, Dong F, Qian K, Wang J. Molecular cloning and characterization of GABA receptor and GluCl subunits in the western flower thrips, Frankliniella occidentalis. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2018; 150:33-39. [PMID: 30195385 DOI: 10.1016/j.pestbp.2018.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/08/2018] [Accepted: 06/16/2018] [Indexed: 06/08/2023]
Abstract
To understand the role of target site insensitivity in abamectin resistance in the western flower thrips (WFT), Frankliniella occidentalis (Pergande), cDNAs encoding gamma-aminobutyric acid receptor subunit (FoRdl) and glutamate-gated chloride channel (FoGluCl) were cloned from WFT, and both single nucleotide polymorphisms (SNPs) and mRNA expression levels of FoRdl and FoGluCl were detected in a susceptible strain (ABA-S) and a laboratory selected strain (ABA-R) displaying 45.5-fold resistance to abamectin. Multiple cDNA sequence alignment revealed three alternative splicing variants of FoRdl and two alternative splicing variants of FoGluCl generated by alternative splicing of exon 3. While sequence comparison of FoRdl and FoGluCl in ABA-S and ABA-R strains identified no resistance-associated mutations, the expression level of FoGluCl in ABA-R strain was 2.63-fold higher than that in ABA-S strain. Thus, our preliminary results provide the evidence that the increased mRNA expression of FoGluCl could be an important factor in FoGluCl-mediated target site insensitivity in WFT.
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Affiliation(s)
- Xiangkun Meng
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Zhijuan Xie
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Nan Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Caihong Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Fan Dong
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Kun Qian
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Jianjun Wang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
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11
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Bonnafé E, Alayrangues J, Hotier L, Massou I, Renom A, Souesme G, Marty P, Allaoua M, Treilhou M, Armengaud C. Monoterpenoid-based preparations in beehives affect learning, memory, and gene expression in the bee brain. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:337-345. [PMID: 27306119 DOI: 10.1002/etc.3527] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/18/2016] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
Bees are exposed in their environment to contaminants that can weaken the colony and contribute to bee declines. Monoterpenoid-based preparations can be introduced into hives to control the parasitic mite Varroa destructor. The long-term effects of monoterpenoids are poorly investigated. Olfactory conditioning of the proboscis extension reflex (PER) has been used to evaluate the impact of stressors on cognitive functions of the honeybee such as learning and memory. The authors tested the PER to odorants on bees after exposure to monoterpenoids in hives. Octopamine receptors, transient receptor potential-like (TRPL), and γ-aminobutyric acid channels are thought to play a critical role in the memory of food experience. Gene expression levels of Amoa1, Rdl, and trpl were evaluated in parallel in the bee brain because these genes code for the cellular targets of monoterpenoids and some pesticides and neural circuits of memory require their expression. The miticide impaired the PER to odors in the 3 wk following treatment. Short-term and long-term olfactory memories were improved months after introduction of the monoterpenoids into the beehives. Chronic exposure to the miticide had significant effects on Amoa1, Rdl, and trpl gene expressions and modified seasonal changes in the expression of these genes in the brain. The decrease of expression of these genes in winter could partly explain the improvement of memory. The present study has led to new insights into alternative treatments, especially on their effects on memory and expression of selected genes involved in this cognitive function. Environ Toxicol Chem 2017;36:337-345. © 2016 SETAC.
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Affiliation(s)
- Elsa Bonnafé
- Jean-François Champollion University Center, Albi, France
| | | | - Lucie Hotier
- Research Center on Animal Cognition, Integrative Biology Center, University of Toulouse, CNRS, Toulouse, France
| | - Isabelle Massou
- Research Center on Animal Cognition, Integrative Biology Center, University of Toulouse, CNRS, Toulouse, France
| | - Allan Renom
- Research Center on Animal Cognition, Integrative Biology Center, University of Toulouse, CNRS, Toulouse, France
| | - Guillaume Souesme
- Research Center on Animal Cognition, Integrative Biology Center, University of Toulouse, CNRS, Toulouse, France
| | - Pierre Marty
- Jean-François Champollion University Center, Albi, France
| | - Marion Allaoua
- Jean-François Champollion University Center, Albi, France
| | | | - Catherine Armengaud
- Research Center on Animal Cognition, Integrative Biology Center, University of Toulouse, CNRS, Toulouse, France
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12
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Boitard C, Devaud JM, Isabel G, Giurfa M. GABAergic feedback signaling into the calyces of the mushroom bodies enables olfactory reversal learning in honey bees. Front Behav Neurosci 2015; 9:198. [PMID: 26283938 PMCID: PMC4518197 DOI: 10.3389/fnbeh.2015.00198] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 07/13/2015] [Indexed: 11/26/2022] Open
Abstract
In reversal learning, subjects first learn to respond to a reinforced stimulus A and not to a non-reinforced stimulus B (A+ vs. B−) and then have to learn the opposite when stimulus contingencies are reversed (A− vs. B+). This change in stimulus valence generates a transitory ambiguity at the level of stimulus outcome that needs to be overcome to solve the second discrimination. Honey bees (Apis mellifera) efficiently master reversal learning in the olfactory domain. The mushroom bodies (MBs), higher-order structures of the insect brain, are required to solve this task. Here we aimed at uncovering the neural circuits facilitating reversal learning in honey bees. We trained bees using the olfactory conditioning of the proboscis extension reflex (PER) coupled with localized pharmacological inhibition of Gamma-AminoButyric Acid (GABA)ergic signaling in the MBs. We show that inhibition of ionotropic but not metabotropic GABAergic signaling into the MB calyces impairs reversal learning, but leaves intact the capacity to perform two consecutive elemental olfactory discriminations with ambiguity of stimulus valence. On the contrary, inhibition of ionotropic GABAergic signaling into the MB lobes had no effect on reversal learning. Our results are thus consistent with a specific requirement of the feedback neurons (FNs) providing ionotropic GABAergic signaling from the MB lobes to the calyces for counteracting ambiguity of stimulus valence in reversal learning.
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Affiliation(s)
- Constance Boitard
- Research Center on Animal Cognition (UMR 5169), Centre National de la Recherche Scientifique (CNRS) Toulouse, France ; Research Center on Animal Cognition (UMR 5169), Université Paul Sabatier Toulouse, France
| | - Jean-Marc Devaud
- Research Center on Animal Cognition (UMR 5169), Centre National de la Recherche Scientifique (CNRS) Toulouse, France ; Research Center on Animal Cognition (UMR 5169), Université Paul Sabatier Toulouse, France
| | - Guillaume Isabel
- Research Center on Animal Cognition (UMR 5169), Centre National de la Recherche Scientifique (CNRS) Toulouse, France ; Research Center on Animal Cognition (UMR 5169), Université Paul Sabatier Toulouse, France
| | - Martin Giurfa
- Research Center on Animal Cognition (UMR 5169), Centre National de la Recherche Scientifique (CNRS) Toulouse, France ; Research Center on Animal Cognition (UMR 5169), Université Paul Sabatier Toulouse, France
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Xu G, Wu SF, Wu YS, Gu GX, Fang Q, Ye GY. De novo assembly and characterization of central nervous system transcriptome reveals neurotransmitter signaling systems in the rice striped stem borer, Chilo suppressalis. BMC Genomics 2015; 16:525. [PMID: 26173787 PMCID: PMC4501067 DOI: 10.1186/s12864-015-1742-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Accepted: 06/30/2015] [Indexed: 01/27/2023] Open
Abstract
Background Neurotransmitter signaling systems play crucial roles in multiple physiological and behavioral processes in insects. Genome wide analyses of de novo transcriptome sequencing and gene specific expression profiling provide rich resources for studying neurotransmitter signaling pathways. The rice striped stem borer, Chilo suppressalis is a destructive rice pest in China and other Asian countries. The characterization of genes involved in neurotransmitter biosynthesis and transport could identify potential targets for disruption of the neurochemical communication and for crop protection. Results Here we report de novo sequencing of the C. suppressalis central nervous system transcriptome, identification and expression profiles of genes putatively involved in neurotransmitter biosynthesis, packaging, and recycling/degradation. A total of 54,411 unigenes were obtained from the transcriptome analysis. Among these unigenes, we have identified 32 unigenes (31 are full length genes), which encode 21 enzymes and 11 transporters putatively associated with biogenic aminergic signaling, acetylcholinergic signaling, glutamatergic signaling and GABAergic signaling. RT-PCR and qRT-PCR results indicated that 12 enzymes were highly expressed in the central nervous system and all the transporters were expressed at significantly high levels in the central nervous system. In addition, the transcript abundances of enzymes and transporters in the central nervous system were validated by qRT-PCR. The high expression levels of these genes suggest their important roles in the central nervous system. Conclusions Our study identified genes potentially involved in neurotransmitter biosynthesis and transport in C. suppressalis and these genes could serve as targets to interfere with neurotransmitter production. This study presents an opportunity for the development of specific and environmentally safe insecticides for pest control. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1742-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Gang Xu
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Shun-Fan Wu
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China. .,State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Ya-Su Wu
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Gui-Xiang Gu
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Qi Fang
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Gong-Yin Ye
- State Key Laboratory of Rice Biology & Key Laboratory of Agricultural Entomology of Ministry of Agriculture, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
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Bonnafé E, Drouard F, Hotier L, Carayon JL, Marty P, Treilhou M, Armengaud C. Effect of a thymol application on olfactory memory and gene expression levels in the brain of the honeybee Apis mellifera. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:8022-8030. [PMID: 24590599 DOI: 10.1007/s11356-014-2616-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 02/03/2014] [Indexed: 06/03/2023]
Abstract
Essential oils are used by beekeepers to control the Varroa mites that infest honeybee colonies. So, bees can be exposed to thymol formulations in the hive. The effects of the monoterpenoid thymol were explored on olfactory memory and gene expression in the brain of the honeybee. In bees previously exposed to thymol (10 or 100 ng/bee), the specificity of the response to the conditioned stimulus (CS) was lost 24 h after learning. Besides, the octopamine receptor OA1 gene Amoa1 showed a significant decrease of expression 3 h after exposure with 10 or 100 ng/bee of thymol. With the same doses, expression of Rdl gene, coding for a GABA receptor subunit, was not significantly modified but the trpl gene was upregulated 1 and 24 h after exposure to thymol. These data indicated that the genes coding for the cellular targets of thymol could be rapidly regulated after exposure to this molecule. Memory and sensory processes should be investigated in bees after chronic exposure in the hive to thymol-based preparations.
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Affiliation(s)
- Elsa Bonnafé
- VAcBio Group, EA 4357, Champollion University Center, 81012, Albi Cedex 09, France
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15
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Kinoshita M, Shimohigasshi M, Tominaga Y, Arikawa K, Homberg U. Topographically distinct visual and olfactory inputs to the mushroom body in the Swallowtail butterfly,Papilio xuthus. J Comp Neurol 2014; 523:162-82. [DOI: 10.1002/cne.23674] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 09/05/2014] [Accepted: 09/05/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Michiyo Kinoshita
- Laboratory of Neuroethology; Sokendai-Hayama (The Graduate University for Advanced Studies); Shonan Village Hayama 240-0193 Japan
| | - Miki Shimohigasshi
- Department of Earth System of Science, Faculty of Science; Fukuoka University; Fukuoka 814-0180 Japan
| | - Yoshiya Tominaga
- Department of Earth System of Science, Faculty of Science; Fukuoka University; Fukuoka 814-0180 Japan
| | - Kentaro Arikawa
- Laboratory of Neuroethology; Sokendai-Hayama (The Graduate University for Advanced Studies); Shonan Village Hayama 240-0193 Japan
| | - Uwe Homberg
- Department of Biology, Animal Physiology; University of Marburg; D-35032 Marburg Germany
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Démares F, Drouard F, Massou I, Crattelet C, Lœuillet A, Bettiol C, Raymond V, Armengaud C. Differential involvement of glutamate-gated chloride channel splice variants in the olfactory memory processes of the honeybee Apis mellifera. Pharmacol Biochem Behav 2014; 124:137-44. [PMID: 24911646 DOI: 10.1016/j.pbb.2014.05.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 05/27/2014] [Accepted: 05/31/2014] [Indexed: 11/16/2022]
Abstract
Glutamate-gated chloride channels (GluCl) belong to the cys-loop ligand-gated ion channel superfamily and their expression had been described in several invertebrate nervous systems. In the honeybee, a unique gene amel_glucl encodes two alternatively spliced subunits, Amel_GluCl A and Amel_GluCl B. The expression and differential localization of those variants in the honeybee brain had been previously reported. Here we characterized the involvement of each variant in olfactory learning and memory processes, using specific small-interfering RNA (siRNA) targeting each variant. Firstly, the efficacy of the two siRNAs to decrease their targets' expression was tested, both at mRNA and protein levels. The two proteins showed a decrease of their respective expression 24h after injection. Secondly, each siRNA was injected into the brain to test whether or not it affected olfactory memory by using a classical paradigm of conditioning the proboscis extension reflex (PER). Amel_GluCl A was found to be involved only in retrieval of 1-nonanol, whereas Amel_GluCl B was involved in the PER response to 2-hexanol used as a conditioned stimulus or as new odorant. Here for the first time, a differential behavioral involvement of two highly similar GluCl subunits has been characterized in an invertebrate species.
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Affiliation(s)
- Fabien Démares
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France.
| | - Florian Drouard
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Isabelle Massou
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Cindy Crattelet
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Aurore Lœuillet
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Célia Bettiol
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
| | - Valérie Raymond
- Laboratoire Récepteurs et Canaux Ioniques Membranaires (RCIM), UPRES-EA2647 USC INRA 1330 SFR 4207 QUASAV, LUNAM Université d'Angers, 2 blvd Lavoisier, F-49045 Angers Cedex 01, France
| | - Catherine Armengaud
- Centre de Recherches sur la Cognition Animale, Université Paul Sabatier Toulouse III, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France
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17
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Kita T, Ozoe F, Ozoe Y. Expression pattern and function of alternative splice variants of glutamate-gated chloride channel in the housefly Musca domestica. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2014; 45:1-10. [PMID: 24291284 DOI: 10.1016/j.ibmb.2013.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/19/2013] [Accepted: 11/21/2013] [Indexed: 06/02/2023]
Abstract
Glutamate-gated chloride channels (GluCls) mediate fast inhibitory neurotransmission in invertebrate nervous systems. cDNAs encoding two alternative splice variants (MdGluClB and C) of the GluCl subunit were cloned from the housefly Musca domestica. The expression patterns of three variants, including the previously reported MdGluClA, differed among the body parts (head, thorax, abdomen, and leg) of the adult housefly and among developmental stages (embryo, larva, pupa, and adult). The MdGluClA and B transcripts were abundant in the central nervous system of the adult, whereas the MdGluClC transcript was expressed in the central nervous system and as the predominant variant in the peripheral tissues. The sensitivities to the agonist glutamate and the allosteric activator ivermectin B1a did not differ between channels containing MdGluCl variants when they were singly or co-expressed in Xenopus oocytes. By contrast, MdGluClA and B channels were more sensitive to the channel blockers fipronil and picrotoxinin than was MdGluClC channels. Heteromeric channels containing different subunit variants were more sensitive to picrotoxinin than were homomeric channels. Heteromeric channels were more sensitive to fipronil than were homomeric MdGluClC channels but not than homomeric MdGluClA and B channels. These results suggest that functionally indistinguishable but pharmacologically distinct GluCls are expressed in a spatially and temporally distinct manner in the housefly.
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Affiliation(s)
- Tomo Kita
- Division of Bioscience and Biotechnology, The United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan
| | - Fumiyo Ozoe
- Department of Life Science and Biotechnology, Faculty of Life and Environmental Science, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Yoshihisa Ozoe
- Division of Bioscience and Biotechnology, The United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan; Department of Life Science and Biotechnology, Faculty of Life and Environmental Science, Shimane University, Matsue, Shimane 690-8504, Japan.
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Kita T, Ozoe F, Azuma M, Ozoe Y. Differential distribution of glutamate- and GABA-gated chloride channels in the housefly Musca domestica. JOURNAL OF INSECT PHYSIOLOGY 2013; 59:887-893. [PMID: 23806605 DOI: 10.1016/j.jinsphys.2013.06.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/11/2013] [Accepted: 06/14/2013] [Indexed: 06/02/2023]
Abstract
l-Glutamic acid (glutamate) mediates fast inhibitory neurotransmission by affecting glutamate-gated chloride channels (GluCls) in invertebrates. The molecular function and pharmacological properties of GluCls have been well studied, but not much is known about their physiological role and localization in the insect body. The distribution of GluCls in the housefly (Musca domestica L.) was thus compared with the distribution of γ-aminobutyric acid (GABA)-gated chloride channels (GABACls). Quantitative PCR and ligand-binding experiments indicate that the GluCl and GABACl transcripts and proteins are predominantly expressed in the adult head. Intense GluCl immunostaining was detected in the lamina, leg motor neurons, and legs of adult houseflies. The GABACl (Rdl) immunostaining was more widely distributed, and was found in the medulla, lobula, lobula plate, mushroom body, antennal lobe, and ellipsoid body. The present findings suggest that GluCls have physiological roles in different tissues than GABACls.
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Affiliation(s)
- Tomo Kita
- Division of Bioscience and Biotechnology, The United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8553, Japan
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