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Wang Y, Chang Y, Gong W, Du Y. Life Table Study of Liriomyza trifolii and Its Contribution to Thermotolerance: Responding to Long-Term Selection Pressure for Abamectin Resistance. INSECTS 2024; 15:462. [PMID: 38921175 PMCID: PMC11203713 DOI: 10.3390/insects15060462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/13/2024] [Accepted: 06/18/2024] [Indexed: 06/27/2024]
Abstract
Liriomyza trifolii is a significant invasive pest that targets horticultural and vegetable crops, causing large-scale outbreaks characterized by pronounced thermotolerance and insecticide resistance. This study examined the impact of long-term selection for abamectin resistance during the larval stage of L. trifolii on its population dynamics and thermal tolerance. We conducted a comprehensive comparison between the abamectin-resistant strain (AB-R) and the susceptible strain (S), including age-stage, two-sex life table analysis, thermal preference (Tpref), critical thermal maximum (CTmax), heat knockdown times (HKDTs), eclosion and survival rates, and LtHsp expression under heat stress. Our results showed that while selection for abamectin resistance was detrimental to survival and reproduction, it activated self-defense mechanisms and rapid adaptive adjustments and conferred modest thermal tolerance, which suggests a dual nature of insecticide effects. The AB-R strain exhibited significantly higher thermal preference and CTmax values, along with a longer HKDT and improved survival. Additionally, there was a significant upregulation of LtHsp expression in the AB-R strain compared to the S strain. These findings indicate that the evolution of thermal adaptation was accompanied by abamectin resistance development, emphasizing the necessity of considering temperature effects when applying chemical control. Our study provides valuable insights into how physiological acclimation may help mitigate the toxic effects of insecticides and illustrate how insects respond to multiple environmental pressures.
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Affiliation(s)
- Yucheng Wang
- College of Plant Protection, Yangzhou University, Yangzhou 225000, China; (Y.W.); (Y.C.)
| | - Yawen Chang
- College of Plant Protection, Yangzhou University, Yangzhou 225000, China; (Y.W.); (Y.C.)
| | - Weirong Gong
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing 210036, China;
| | - Yuzhou Du
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education, Yangzhou University, Yangzhou 225000, China
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Wang YC, Chang YW, Gong WR, Hu J, Du YZ. The development of abamectin resistance in Liriomyza trifolii and its contribution to thermotolerance. PEST MANAGEMENT SCIENCE 2024; 80:2053-2060. [PMID: 38131224 DOI: 10.1002/ps.7944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/16/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Liriomyza trifolii is an economically significant, invasive pest of horticultural and vegetable crops. The larvae form tunnels in foliage and hasten senescence and death. Outbreaks of L. trifolii often erupt in hot weather and are driven by thermotolerance; furthermore, the poor effectiveness of pesticides has made outbreaks more severe. But it is still unclear whether the development of insecticide tolerance will contribute to thermotolerance in L. trifolii. RESULTS To explore potential synergistic relationships between insecticide exposure and thermotolerance in L. trifolii, we first generated an abamectin-resistant (AB-R) strain. Knockdown behavior, eclosion and survival rates, and expression levels of genes encoding heat shock proteins (Hsps) in L. trifolii were then examined in AB-R and abamectin-susceptible (AB-S) strains. Our results demonstrated that long-term selection pressure for abamectin resistance made L. trifolii more prone to develop cross-resistance to other insecticides containing similar ingredients. Furthermore, the AB-R strain exhibited enhanced thermotolerance and possessed an elevated critical thermal maximum temperature, and upregulated expression levels of Hsps during heat stress. CONCLUSION Collectively, our results indicate that thermal adaptation in L. trifolii was accompanied by emerging abamectin resistance. This study provides a theoretical basis for investigating the synergistic or cross-adaptive mechanisms that insects use to cope with adversity and demonstrates the complexity of insect adaptation to environmental and chemical stress. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Yu-Cheng Wang
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Ya-Wen Chang
- College of Plant Protection, Yangzhou University, Yangzhou, China
| | - Wei-Rong Gong
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing, China
| | - Jie Hu
- Plant Protection and Quarantine Station of Jiangsu Province, Nanjing, China
| | - Yu-Zhou Du
- College of Plant Protection, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education, Yangzhou University, Yangzhou, China
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Ghazawy NAR, Afify A, Radwan IT, Ghabban H, Alkhaibari AM, Gattan HS, Alruhaili MH, Selim A, Saad MMA. The Effect of Abamectin on Locusta Migratoria Neurosecretory Cells and Mid Gut, Using Ultrastructure Examination, Oxidative Stress Study, and In-Silico Molecular Docking. Molecules 2023; 28:6956. [PMID: 37836800 PMCID: PMC10574411 DOI: 10.3390/molecules28196956] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/01/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
(1) Background: Few studies have been carried out to appraise abamectin toxicity toward Locusta migratoria nymphs. (2) Methods: This study aimed to evaluate the cytotoxic effect of abamectin as an insecticide through examining the changes and damage caused by this drug, in both neurosecretory cells and midgut, using L. migratoria nymphs as a model of the cytotoxic effect. Histopathological change in the brain was examined in both normal and abamectin-treated fifth-instar nymphs. Neurosecretory cells (NSCs) were also examined where there were loosely disintegrated cells or vacuolated cytoplasm. (3) Results: The results showed distinct histological changes in the gastrointestinal tract of L. migratoria nymphs treated with abamectin, with significant cellular damage and disorganization, i.e., characteristic symptoms of cell necrosis, a destroyed epithelium, enlarged cells, and reduced nuclei. The observed biochemical changes included an elevation in all measured oxidative stress parameters compared to untreated controls. The malondialdehyde activities (MDAs) of the treated nymphs had a five- to six-fold increase, with a ten-fold increase in superoxide dismutase (SOD), nine-fold increase in glutathione-S-transferase (GST), and four-fold increase in nitric oxide (NO). (4) Conclusions: To further investigate the theoretical method of action, a molecular docking simulation was performed, examining the possibility that abamectin is an inhibitor of the fatty acid-binding protein Lm-FABP (2FLJ) and that it binds with two successive electrostatic hydrogen bonds.
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Affiliation(s)
| | - Amira Afify
- Department of Entomology, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - Ibrahim Taha Radwan
- Supplementary General Sciences Department, Faculty of Oral and Dental Medicine, Future University in Egypt, Cairo 11835, Egypt
| | - Hanaa Ghabban
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Abeer Mousa Alkhaibari
- Department of Biology, Faculty of Science, University of Tabuk, Tabuk 71491, Saudi Arabia
| | - Hattan S. Gattan
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21363, Saudi Arabia
- Special Infectious Agents Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah 21362, Saudi Arabia
| | - Mohammed H. Alruhaili
- Special Infectious Agents Unit, King Fahad Medical Research Center, King AbdulAziz University, Jeddah 21362, Saudi Arabia
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King AbdulAziz University, Jeddah 21362, Saudi Arabia
| | - Abdelfattah Selim
- Department of Animal Medicine (Infectious Diseases), Faculty of Veterinary Medicine, Benha University, Toukh 13736, Egypt
| | - Mona M. Ali Saad
- Department of Entomology, Faculty of Science, Cairo University, Giza 12613, Egypt
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Bonfoey AM, Chen J, Stahlschmidt ZR. Stress tolerance is influenced by artificial light at night during development and life-history strategy. J Exp Biol 2023; 226:286276. [PMID: 36606751 DOI: 10.1242/jeb.245195] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 12/16/2022] [Indexed: 01/07/2023]
Abstract
Artificial light at night (ALAN) is increasingly prevalent worldwide, but life-history strategy may mitigate the costs of ALAN for animals. Yet, interactions among ALAN, life-history strategy and tolerance to climate-related stressors are unknown. We determined if developmental ALAN exposure (1) affects development, (2) affects adult phenotype, including heat and desiccation tolerance, and (3) affects and/or interacts with life-history strategy. We used the variable field cricket (Gryllus lineaticeps) because its geographic range is increasingly exposed to ALAN, heat, and drought conditions, and it exhibits different life-history strategies (flight-capability versus flight-incapability). ALAN affected adult phenotype, with positive effects on body mass (and size) and female reproductive investment, and a negative effect on heat tolerance. Life-history strategy also affected stress tolerance; flight-incapable females had greater heat tolerance and their desiccation tolerance was improved by ALAN exposure. Key features of environmental change (i.e. exposure to ALAN, heat and drought) may favor some life-history strategies over others.
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Affiliation(s)
- Alyssa M Bonfoey
- Department of Biological Sciences, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Jessica Chen
- Department of Biological Sciences, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Zachary R Stahlschmidt
- Department of Biological Sciences, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
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Khan MM, Ali MW, Hafeez M, Fan ZY, Ali S, Qiu BL. Lethal and sublethal effects of emamectin benzoate on life-table and physiological parameters of citrus red mite, Panonychus citri. EXPERIMENTAL & APPLIED ACAROLOGY 2021; 85:173-190. [PMID: 34677719 DOI: 10.1007/s10493-021-00667-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
The citrus red mite (Panonychus citri) is a challenge to manage in citrus orchards due to resistance against several pesticides. There is a necessity therefore to find new pesticides for effective control of P. citri. This study was designed to evaluate the lethal and sublethal effects of emamectin benzoate against P. citri. The results showed that the LC50 of emamectin benzoate to adults of P. citri was 0.35 (0.26-0.43) mg a.i. L-1 and the LC90 was 1.44 (1.16-1.96) mg a.i. L-1. The sublethal concentration exposures (LC10 and LC30) had a significant negative impact on the larval, protonymph, and deutonymph developmental periods. Male longevity was much lower in LC30 treatments than in the controls. Although female longevity was unaffected, the fecundity (eggs per female) was decreased in the sublethal concentration treatments. Results revealed that the adult pre-oviposition period (APOP) and total pre-oviposition period (TPOP) were increased. Other growth parameters r, λ, and R0 decreased, whereas mean generation time (T) increased due to pesticide exposure. The survival rate (Sxj), age-specific fecundity and net maternity, life expectancy (Exj), and reproduction (Vxj) was reduced by LC10 and LC30 exposure. An increase in malondialdehyde (MDA) contents with increasing emamectin benzoate concentration demonstrates that emamectin benzoate induces oxidative stress in P. citri. The activity of antioxidant enzymes (superoxide dismutase, SOD and catalase, CAT) was decreased due to LC30 and LC10 treatments compared to the control. Detoxification enzyme activity (cytochrome P450, glutathione-S-transferases, GST and acetylcholinesterase, AChE) was increased in treated mites compared to the control. This study demonstrates that emamectin benzoate has both a lethal effect on citrus red mite and sublethal effects on its biology and physiology. It is, therefore, potentially an effective pesticide for management of P. citri.
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Affiliation(s)
- Muhammad Musa Khan
- Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, South China Agricultural University, Guangzhou, 510642, China.
- Engineering Research Center of Biocontrol, Ministry of Education, Guangdong Province, Guangzhou, 510640, Guangdong, China.
| | - Muhammad Waqar Ali
- Institute of Fruit and Tea, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China
| | - Muhammad Hafeez
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Ze-Yun Fan
- Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, South China Agricultural University, Guangzhou, 510642, China
- Engineering Research Center of Biocontrol, Ministry of Education, Guangdong Province, Guangzhou, 510640, Guangdong, China
| | - Shaukat Ali
- Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, South China Agricultural University, Guangzhou, 510642, China
- Engineering Research Center of Biocontrol, Ministry of Education, Guangdong Province, Guangzhou, 510640, Guangdong, China
| | - Bao-Li Qiu
- Key Laboratory of Bio-Pesticide Innovation and Application, Guangdong Province, South China Agricultural University, Guangzhou, 510642, China.
- Engineering Research Center of Biocontrol, Ministry of Education, Guangdong Province, Guangzhou, 510640, Guangdong, China.
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Fan W, Li G, Zhang X, Wang Y, Wang C, Xu B, Guo X, Li H. The role of melatonin and Tryptophan-5-hydroxylase-1 in different abiotic stressors in Apis cerana cerana. JOURNAL OF INSECT PHYSIOLOGY 2021; 128:104180. [PMID: 33309689 DOI: 10.1016/j.jinsphys.2020.104180] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 05/20/2023]
Abstract
Tryptophan-5-hydroxylase-1 (T5H-1) is the rate-limiting enzyme in the biosynthesis of serotonin, which is involved in the biosynthesis of melatonin (Mel). Mel, a biological hormone, plays crucial roles in stressors tolerance, such as cold, hot, Ultraviolet (UV) and pesticide tolerance. However, the direct correlation between T5H-1 and Mel and the underlying mechanism in organisms remains elusive. Mel-mediated cold tolerance was studied extensively in plants and somewhat in insects, including bees. The present study isolated the Mel synthesis gene T5H-1 from Apis cerana cerana for the first time. qRT-PCR analysis indicated that AccT5H-1 played vital roles during some adverse conditions, including 4 °C, 8 °C, 10 °C, 45 °C, UV, cyhalothrin, abamectin, paraquat and bifenthrin exposure. Knockdown of AccT5H-1 using RNA interference (RNAi) technology upregulated most antioxidant genes. Additionally, an enzyme activity assay revealed higher contents of Malondialdehyde (MDA) and Hydrogen peroxide (H2O2), lower content of Vitamin C (VC), and higher activities of Glutathione S-transferase (GST), Superoxide dismutase (SOD), Catalase (CAT) and Peroxidase (POD) in the AccT5H-1 silenced group than the control group. These results suggest that AccT5H-1 is involved in the response to different oxidative stressors in A. cerana cerana. The survival rate of A. cerana cerana exposed to low temperature treatment revealed that the optimal concentration of Mel in the diet was 10 µg/mL. We also found that the antioxidant enzyme (GST, SOD, POD and CAT) concentrations at 10 µg/mL Mel increased to different degrees, and the content of oxidizing substances (MDA and H2O2) decreased, the content of VC increased, and the content of substances that promote cold resistance (glycerol and glycogen) increased. Mel increased the resistance of A. cerana cerana exposed to low temperatures. The expression of AccT5H-1 decreased after the feeding of exogenous Mel to bees. These results provide a reference for other insect studies on Mel and T5H-1.
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Affiliation(s)
- Wenyan Fan
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Guilin Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Xuemei Zhang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Ying Wang
- College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Chen Wang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Baohua Xu
- College of Animal Science and Technology, Shandong Agricultural University, Taian, Shandong 271018, PR China
| | - Xingqi Guo
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China.
| | - Han Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, Shandong 271018, PR China.
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de Sousa FA, de Morais CR, Vieira JS, Maranho LS, Machado FL, Pereira S, Barbosa LC, Coelho HE, Campos CF, Bonetti AM. Genotoxicity and carcinogenicity of ivermectin and amoxicillin in vivo systems. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2019; 70:103196. [PMID: 31152944 DOI: 10.1016/j.etap.2019.103196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 04/21/2019] [Accepted: 05/21/2019] [Indexed: 06/09/2023]
Abstract
Antiparasitic substances are chemicals used to control or kill endoparasites and ectoparasites. Based on the premise that Ivermectin (IVM) and Amoxicillin (AMX) are commonly considered in parasitic control in mammals, the present study aimed to evaluate the carcinogenic and genotoxic potential of different concentrations of IVM and AMX through the detection of epithelial tumor test in Drosophila melanogaster. Third-instar larvae descending from the cross between wts/TM3, Sb1 females and mwh/mwh males were treated with different concentrations of IVM (2.9, 5.8, 11.6 and 23.2 x 10-17 mM) or AMX (1.37, 2.74, 5.48 and 10.9 x 10-16mM). The results revealed that IVM increased the frequency of epithelial tumor in D. melanogaster considering all evaluated concentrations, while AMX showed no carcinogenic effect. Furthermore, the Micronucleus (MN) test in Tradescantia pallida was used to evaluate the genotoxic effect of IVM and AMX. T. pallida individuals were exposed for 8 hours at different concentrations of IVM (5.71, 11.42, 22.84 and 45.68 x 10-5mM) or AMX (5.13, 10.26, 20.52 and 41.05 x 10-3mM). Findings showed an increase in the frequency of micronuclei in T. pallida treated with 11.42, 22.84 and 45.68 x 10-5mM of IVM. We conclude that chronic exposure to IVM is directly associated with events resulting from genetic instability (genotoxicity and carcinogenicity). On the other hand, AMX was neither carcinogenic nor genotoxic for D. melanogaster and T. pallida.
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Affiliation(s)
- Francielle Aparecida de Sousa
- Department of Genetics, University Center of Cerrado Patrocínio, Avenida Líria Terezinha Lassi Capuano, 466, 38747-792, Patrocínio, Minas Gerais, Brazil
| | - Cássio Resende de Morais
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil.
| | - Jéssica Soares Vieira
- Department of Cell Biology, Carmelitana Foundation Mário Palmério, 38500-000, Monte Carmelo, Minas Gerais, Brazil
| | - Lavínia Sales Maranho
- Department of Genetics, University Center of Cerrado Patrocínio, Avenida Líria Terezinha Lassi Capuano, 466, 38747-792, Patrocínio, Minas Gerais, Brazil
| | - Francielli Lara Machado
- Department of Genetics, University Center of Cerrado Patrocínio, Avenida Líria Terezinha Lassi Capuano, 466, 38747-792, Patrocínio, Minas Gerais, Brazil
| | - Samanta Pereira
- Department of Genetics, University Center of Cerrado Patrocínio, Avenida Líria Terezinha Lassi Capuano, 466, 38747-792, Patrocínio, Minas Gerais, Brazil
| | - Lilian Cristina Barbosa
- Department of Genetics, University Center of Cerrado Patrocínio, Avenida Líria Terezinha Lassi Capuano, 466, 38747-792, Patrocínio, Minas Gerais, Brazil
| | - Humberto Eustáquio Coelho
- Department of Animal Pathology, University of Uberaba, Avenida Nenê Sabino, 1801 - Bairro Universitário, 38055-500, Uberaba, Minas Gerais, Brazil
| | - Carlos Fernando Campos
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
| | - Ana Maria Bonetti
- Institute of Biotechnology, Federal University of Uberlândia, Campus Umuarama, 38900-402, Uberlândia, Minas Gerais, Brazil
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Zeng J, Bi B, Zhang F, Cheng G, Vuong Thi MD, Zhang G. Cu/ZnSOD always responded stronger and rapider than MnSOD in Lymantria dispar larvae under the avermectin stress. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 156:72-79. [PMID: 31027583 DOI: 10.1016/j.pestbp.2019.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/03/2019] [Accepted: 02/10/2019] [Indexed: 06/09/2023]
Abstract
Metalloenzyme SODs play important roles in insects dealing with environmental stress. Here, we cloned the Cu/ZnSOD (LdCZS) and MnSOD (LdMS) mRNA of Lymantria dispar by rapid amplification of cDNA ends (RACE). Afterwards their expression patterns were detected by quantitative real-time polymerase chain reaction (qPCR) after bioinformatic analysis. We found that both LdCZS and LdMS were widely detected in all gypsy moth larvae and all five tissues that we analyzed, and both of them were up-regulated after larvae were fed with avermectin of sublethal concentration and LC10. The LdCZS expression value are always higher than LdMS after treating with avermectin of sublethal concentrations. In addition, temporal expression profile in avermectin treated larvae showed that LdCZS expressed highest at 2nd hour, and LdMS expressed highest at 6th hour. The cuticulas transcribed LdCZS and LdMS significantly higher than heads, fat bodies, Malpighian tubes, and midguts after spraying avermectin of sublethal concentration. These results suggested that both Cu/ZnSOD and MnSOD are important antioxidant enzymes in L. dispar defensing against pesticide stress, and LdCZS always responded rapider and stronger than LdMS.
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Affiliation(s)
- JianYong Zeng
- School of Forest, Northeast Forestry University, Harbin 150040, China.
| | - Bing Bi
- School of Forest, Northeast Forestry University, Harbin 150040, China
| | - FangMing Zhang
- School of Forest, Northeast Forestry University, Harbin 150040, China.
| | - Gong Cheng
- Jilin Kunyun Biological Technology Co., Ltd, 138000, China
| | - Minh Dien Vuong Thi
- School of Forest, Northeast Forestry University, Harbin 150040, China; Vietnam Academy of Agricultural Sciences, Hanoi 100803, Viet Nam
| | - GuoCai Zhang
- School of Forest, Northeast Forestry University, Harbin 150040, China.
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Nehela Y, Killiny N. Infection with phytopathogenic bacterium inhibits melatonin biosynthesis, decreases longevity of its vector, and suppresses the free radical-defense. J Pineal Res 2018; 65:e12511. [PMID: 29786865 DOI: 10.1111/jpi.12511] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Accepted: 05/15/2018] [Indexed: 01/08/2023]
Abstract
Vector-borne phytopathogenic bacteria may alter the reproductive fitness, survival, behavior, and metabolism of their vectors. Candidatus Liberibacter asiaticus (CLas) is associated with the Huanglongbing (also known as citrus greening disease), one of the most destructive citrus diseases worldwide, and transmitted by Asian citrus psyllid, Diaphorina citri (Insecta, Hemiptera, Liviidae). The genome sequencing of CLas revealed that it does not have the ability to synthesize tryptophan, the precursor of melatonin, and it must acquire it from its host plant or insect vector to achieve its biologic processes, such as growth and multiplication. Herein, we aimed to develop a GC-MS-SIM-based method to detect the endogenous melatonin from small insects such as D. citri, and to explore the hidden relationship between melatonin content and D. citri-adult survival. Then, we studied the ability of exogenous melatonin supplementation to reverse the negative effects of CLas-infection. Our findings showed that CLas-infection reduced the levels of melatonin and its biosynthetic genes (DcTPHs, DcAAAD, DcSNAT, and DcASMT) of D. citri compared to uninfected insects. In addition, CLas decreased the longevity of its vector, D. citri via the suppression of the free radical-defense associated genes (SODs, GSTs, PODs, and PHGPXs). On the other hand, melatonin supplementation could reverse the negative effects of CLas-infection. Melatonin supplementation enhanced the endogenous melatonin content, melatonin biosynthetic genes, free radical-defense associated genes, and the longevity of both healthy and CLas-infected D. citri. Furthermore, melatonin supplementation decreased the CLas bacterial population within the D. citri psyllids. Based on these findings, we hypothesize that melatonin plays multi-layered defensive roles in D. citri. These roles include acting as a natural antioxidant or as an antibacterial compound.
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Affiliation(s)
- Yasser Nehela
- Department of Plant Pathology, Citrus Research and Education Center, University of Florida, Lake Alfred, FL, USA
| | - Nabil Killiny
- Department of Plant Pathology, Citrus Research and Education Center, University of Florida, Lake Alfred, FL, USA
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Synthesis and suggestion of a new nanometric gold(III) melatonin drug complex: an interesting model for testicular protection. Future Med Chem 2018; 10:1693-1704. [PMID: 29957063 DOI: 10.4155/fmc-2018-0008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM Melatonin (MLT) is a major hormone secreted by the pineal gland. In this study, a gold(III) MLT (Au+3/MLT) complex has been synthesized and investigating its protective effects against testicular damage. METHODOLOGY The structural features of the complex were investigated. For biological assessment, 30 male rats were divided into three groups for 30 days. The first control group, the second received MLT and the third received Au+3/MLT complex. RESULTS The Au+3/MLT complex was found to be nonelectrolytic with formula (Au[MLT]2[Cl][H2O]). The ligand is monodentate and adopt square-planar geometry. Its particles range in diameter from 35 to 100 nm. MLT affords slight oxidative stress protection. The Au+3/MLT complex significantly decreases TNF-α and IL-1β levels but elevates antioxidant enzyme capacities, reducing lipid peroxidation markers and improving testicular histological structure. CONCLUSION The Au+3/MLT complex improves the anti-inflammatory actions of MLT, exhibits potent antioxidant activity and enhances reproductive capacity.
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