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Wang W, Su Y, Qi R, Li H, Jiang H, Li F, Li B, Sun H. Indoxacarb triggers autophagy and apoptosis through ROS accumulation mediated by oxidative phosphorylation in the midgut of Bombyx mori. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2024; 200:105812. [PMID: 38582584 DOI: 10.1016/j.pestbp.2024.105812] [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: 01/04/2024] [Revised: 02/01/2024] [Accepted: 02/03/2024] [Indexed: 04/08/2024]
Abstract
Indoxacarb has been widely utilized in agricultural pest management, posing a significant ecological threat to Bombyx mori, a non-target economic insect. In the present study, short-term exposure to low concentration of indoxacarb significantly suppressed the oxidative phosphorylation pathway, and resulted in an accumulation of reactive oxygen species (ROS) in the midgut of B. mori. While, the ATP content exhibited a declining trend but there was no significant change. Moreover, indoxacarb also significantly altered the transcription levels of six autophagy-related genes, and the transcription levels of ATG2, ATG8 and ATG9 were significantly up-regulated by 2.56-, 1.90-, and 3.36-fold, respectively. The protein levels of ATG8-I and ATG8-II and MDC-stained frozen sections further suggested an increase in autophagy. Furthermore, the protein level and enzyme activity of CASP4 showed a significant increase in accordance with the transcription levels of apoptosis-related genes, indicating the activation of the apoptotic signaling pathway. Meanwhile, the induction of apoptosis signals in the midgut cells triggered by indoxacarb was confirmed through TUNEL staining. These findings suggest that indoxacarb can promote the accumulation of ROS by inhibiting the oxidative phosphorylation pathway, thereby inducing autophagy and apoptosis in the midgut cells of B. mori.
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Affiliation(s)
- Wanwan Wang
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yue Su
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Ruinan Qi
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Hao Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Hongrui Jiang
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Fanchi Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Bing Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
| | - Haina Sun
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
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Peng M, Wang G, Zhu S. Cold-stored mulberry leaves affect antioxidant system and silk proteins of silkworm (Bombyx mori) larva. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:7673-7682. [PMID: 37431698 DOI: 10.1002/jsfa.12849] [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: 02/09/2023] [Revised: 06/16/2023] [Accepted: 07/11/2023] [Indexed: 07/12/2023]
Abstract
BACKGROUND Cold storage has been widely used to maintain the quality of vegetables, but whether eating cold-stored vegetables affects health remains unknown. RESULTS This study used silkworms as an animal model to evaluate the effects of nutrient changes in cold-stored mulberry leaves (CSML) on health. Compared with fresh mulberry leaves (FML), CSML contained lower vitamin C, soluble sugars and proteins, and higher H2 O2 , suggesting decreased antioxidant ability and nutrition. The CSML did not obviously affect larval survival rate, body weight or dry matter rate, cocoon shape, weight and size, or final rates of cluster and cocooning relative to the FML, suggesting CSML did not alter overall growth and development. However, the CSML increased the initial rates of cluster and cocooning and upregulated BmRpd3, suggesting CSML shortened larval lifespan and enhanced senescence. CSML upregulated BmNOX4, downregulated BmCAT, BmSOD and BmGSH-Px and increased H2 O2 in silkworms, suggesting CSML caused oxidative stress. CSML upregulated ecdysone biosynthesis and inactivation genes and elevated ecdysone concentration in silkworms, suggesting that CSML affected hormone homeostasis. CSML upregulated apoptosis-related genes, downregulated sericin and silk fibroin genes and decreased sericin content rate in silkworms, suggesting oxidative stress and protein deficiency. CONCLUSION Cold storage reduced nutrition and antioxidant capability of mulberry leaves. CSML did not influence growth and development of silkworm larva, but affected health by causing oxidative stress and reducing protein synthesis. The findings show that the ingredient changes in CSML had negative effects on health of silkworms. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Miaomiao Peng
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Guang Wang
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Shijiang Zhu
- Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, Engineering Research Center of Southern Horticultural Products Preservation, Ministry of Education, College of Horticulture, South China Agricultural University, Guangzhou, China
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Lu Q, Xu S, Hao Z, Li Y, Huang Y, Ying S, Jing W, Zou S, Xu Y, Wang H. Dinotefuran exposure induces autophagy and apoptosis through oxidative stress in Bombyx mori. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:131997. [PMID: 37423129 DOI: 10.1016/j.jhazmat.2023.131997] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 06/18/2023] [Accepted: 07/03/2023] [Indexed: 07/11/2023]
Abstract
As a third-generation neonicotinoid insecticide, dinotefuran is extensively used in agriculture, and its residue in the environment has potential effects on nontarget organisms. However, the toxic effects of dinotefuran exposure on nontarget organism remain largely unknown. This study explored the toxic effects of sublethal dose of dinotefuran on Bombyx mori. Dinotefuran upregulated reactive oxygen species (ROS) and malondialdehyde (MDA) levels in the midgut and fat body of B. mori. Transcriptional analysis revealed that the expression levels of many autophagy and apoptosis-associated genes were significantly altered after dinotefuran exposure, consistent with ultrastructural changes. Moreover, the expression levels of autophagy-related proteins (ATG8-PE and ATG6) and apoptosis-related proteins (BmDredd and BmICE) were increased, whereas the expression level of an autophagic key protein (sequestosome 1) was decreased in the dinotefuran-exposed group. These results indicate that dinotefuran exposure leads to oxidative stress, autophagy, and apoptosis in B. mori. In addition, its effect on the fat body was apparently greater than that on the midgut. In contrast, pretreatment with an autophagy inhibitor effectively downregulated the expression levels of ATG6 and BmDredd, but induced the expression of sequestosome 1, suggesting that dinotefuran-induced autophagy may promote apoptosis. This study reveals that ROS generation regulates the impact of dinotefuran on the crosstalk between autophagy and apoptosis, laying the foundation for studying cell death processes such as autophagy and apoptosis induced by pesticides. Furthermore, this study provides a comprehensive insight into the toxicity of dinotefuran on silkworm and contributes to the ecological risk assessment of dinotefuran in nontarget organisms.
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Affiliation(s)
- Qingyu Lu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shiliang Xu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Zhihua Hao
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yinghui Li
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yuxin Huang
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shuye Ying
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wenhui Jing
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Shiyu Zou
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yusong Xu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Huabing Wang
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
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Ye W, Dai M, Bian D, Zhu Q, Li X, Sun H, Li F, Wei J, Li B. Sublethal chlorantraniliprole exposure induces autophagy and apoptosis through disrupting calcium homeostasis in the silkworm Bombyx mori. INSECT MOLECULAR BIOLOGY 2023; 32:36-45. [PMID: 36093732 DOI: 10.1111/imb.12811] [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: 03/23/2022] [Accepted: 09/08/2022] [Indexed: 06/15/2023]
Abstract
The intensive application of chlorantraniliprole (CAP) leaves residues in the environment, posing a potential threat to non-target organisms. In the present study, we investigated the adverse effects of sublethal CAP exposure on Bombyx mori. Sublethal CAP (0.02 mg/L) was shown to induce the release of intracellular Ca2+ in BmN cells. Meanwhile, Ca2+ -dependent genes were induced in the midgut at 72 h after CAP (0.01 mg/L) exposure, and damaged mitochondria, autophagosomes, nuclear membrane rupture and condensed chromatin were observed. Moreover, the key genes in the oxidative phosphorylation pathway were significantly down-regulated. The transcript levels of autophagy-related genes ATG6 and ATG8 were significantly up-regulated, and the protein levels of LC3-II and ATG7 were significantly increased by 3.72- and 3.33-fold, respectively. Additionally, the transcript levels of the upstream genes in the apoptosis pathway (calpain and Apaf-1) were significantly up-regulated, the protein levels of the downstream gene caspase 3 and its cleaved form were significantly up-regulated by 1.97- and 4.55-fold, respectively, consistent with the elevated caspase 3 activity at 72 h. Collectively, these findings demonstrate that intracellular Ca2+ release induced by sublethal CAP inhibits oxidative phosphorylation pathway, which causes mitochondrial dysfunction, leading to autophagy and apoptosis in the midgut of B. mori.
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Affiliation(s)
- WenTao Ye
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
| | - MinLi Dai
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
| | - DanDan Bian
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
| | - QingYu Zhu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
| | - Xin Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
| | - HaiNa Sun
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
- Sericulture Institute of Soochow University, Soochow University, Suzhou, China
| | - FanChi Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
- Sericulture Institute of Soochow University, Soochow University, Suzhou, China
| | - Jing Wei
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
- Sericulture Institute of Soochow University, Soochow University, Suzhou, China
| | - Bing Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, China
- Sericulture Institute of Soochow University, Soochow University, Suzhou, China
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Wang Q, Sun Z, Huang Z, Ma S, Chen K, Ju X. Effects of tolfenpyrad exposure on development and response mechanism in the silkworm, Bombyx mori. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2023; 189:105280. [PMID: 36549810 DOI: 10.1016/j.pestbp.2022.105280] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 10/16/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
Tolfenpyrad is a broad spectrum of insecticide that can effectively kill different types of pests, including Lepidoptera. However, due to improper use, the adverse effects of tolfenpyrad on beneficial or economic insects have not been well studied. In this study, we systematically investigated the toxic effect of sublethal tolfenpyrad on silkworms. Sublethal tolfenpyrad exposure can affect the body weight, developments days, cocooning rate, eclosion rate and pupation rate. To further study the response mechanism of silkworms to tolfenpyrad stimulation, we compared the different expression genes by transcriptome sequencing and verified them by qRT-PCR. We found that significant changes in the genes expression was involved in xenobiotics biodegradation and metabolism, immune system and digestive system after tolfenpyrad treatment. To further investigate the possible mechanisms by which intestinal microbia in the response to tolfenpyrad, we analysed the microbia changes in the midgut of silkworms by 16S rRNA gene sequencing. The results showed that the relative abundances of Enterobacter and Staphylococcus were increased whereas the Tyzzerella and Methylobacterium-Methylorubrum were decreased after tolfenpyrad stimulation. Taken together, these results indicated that low concentration of tolfenpyrad affect the growth and development of silkworms. Silkworms respond to the toxicity of tolfenpyrad by inducing immune and detoxification-related gene expression or altering microbial composition in the midgut.
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Affiliation(s)
- Qiang Wang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Zhonghe Sun
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Zengqing Huang
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Shangshang Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Keping Chen
- School of Life Sciences, Jiangsu University, Zhenjiang, Jiangsu, PR China
| | - Xiaoli Ju
- School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, PR China.
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Zhao W, Zheng Q, Qin D, Luo P, Ye C, Shen S, Cheng D, Huang S, Liu L, Xu H, Zhang Z. Azadirachtin inhibits the development and metabolism of the silk glands of Spodoptera frugiperda and affects spinning behavior. PEST MANAGEMENT SCIENCE 2022; 78:5293-5301. [PMID: 36053871 DOI: 10.1002/ps.7151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/06/2022] [Accepted: 08/27/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Spodoptera frugiperda is a major agricultural pest, and the dispersal of its larvae by spinning silk is one of the causes of crop damage. At present, there are relatively few reports of pest control that affect larvae spinning silk. In this study, the effect of spinning behavior of the S. frugiperda larvae was investigated through a series of experiments. RESULTS The 3rd instar larvae of S. frugiperda were exposed to azadirachtin, and the pathological changes in the silk glands of S. frugiperda and the differences in their metabolites were analyzed by scanning electron microscopy, histological sectioning, transmission electron microscopy and metabolomics. The results showed that azadirachtin could affect the silk gland of S. frugiperda. After 48 h of treatment with azadirachtin, the silk gland lumen of S. frugiperda appeared vacuolated. KEGG showed that 31 different metabolites were identified, of which 12 were upregulated and 19 were downregulated. These metabolites were enriched in 15 different metabolic pathways, which indicated that the silk gland of S. frugiperda was closely related to the formation of fatty acids and energy metabolism for the silk formation process. CONCLUSIONS This study provides a preliminary report of the effect of azadirachtin on the spinning behavior of the S. frugiperda larvae. Metabolomic results indicated that histidine, glycine and leucine, which are related to serine protein synthesis, were down-regulated. Azadirachtin can damage the silk glands of S. frugiperda and thus affect spinning behavior. This provides the basis for the control of S. frugiperda by spinning silk. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Weihua Zhao
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Qun Zheng
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Deqiang Qin
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Peiru Luo
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Cuiyi Ye
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Shigang Shen
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Dongmei Cheng
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Suqing Huang
- College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
| | - Lihui Liu
- Plant Protection Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China
| | - Hanhong Xu
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
| | - Zhixiang Zhang
- Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education, South China Agricultural University, Guangzhou, China
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Razavi R, Basij M, Beitollahi H, Panahandeh S. Experimental and theoretical investigation of acetamiprid adsorption on nano carbons and novel PVC membrane electrode for acetamiprid measurement. Sci Rep 2022; 12:12145. [PMID: 35840789 PMCID: PMC9287318 DOI: 10.1038/s41598-022-16459-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 07/11/2022] [Indexed: 11/20/2022] Open
Abstract
Acetamiprid removal was investigated by synthesized Graphene oxide, multiwall nanotube and graphite from an aqueous solution. For this propose, FT-IR, XRD, UV–Vis, SEM and EDS were used to characterize the synthesized nano adsorbents and to determine the removal process. A novel PVC membrane electrode as selective electrode made for determining the concentration of acetamiprid. Batch adsorption studies were conducted to investigate the effect of temperature, initial acetamiprid concentration, adsorbent type and contact time as important adsorption parameters. The maximum equilibrium time was found to be 15 min for graphene oxide. The kinetics studies showed that the adsorption of acetamiprid followed the pseudo-second-order kinetics mechnism. All the adsorption equilibrium data were well fitted to the Langmuir isotherm model and maximum monolayer adsorption capacity 99 percent. Docking data of adsorption have resulted in the same as experimental data in good manner and confirmed the adsorption process.
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Affiliation(s)
- Razieh Razavi
- Department of Chemistry, Faculty of Science, University of Jiroft, Jiroft, Iran.
| | - Moslem Basij
- Department of Plant Protection, Faculty of Agriculture, University of Jiroft, Jiroft, Iran.
| | - Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
| | - Saleh Panahandeh
- Department of Plant Protection, Faculty of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
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Dissecting the Isoform-Specific Roles of FTZ-F1 in the Larval–Larval and Larval–Pupal Ecdyses in Henosepilachna vigintioctopunctata. INSECTS 2022; 13:insects13030228. [PMID: 35323526 PMCID: PMC8951217 DOI: 10.3390/insects13030228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 12/04/2022]
Abstract
Simple Summary Fushi Tarazu Factor-1 (FTZ-F1) plays a crucial regulatory role in molting in insects. It is hypothesized that, by alternative transcription start and splicing, the FTZ-F1 gene generates two isomers (α- and βFTZ-F1) that exert isoform-specific roles in non-Drosophilid insects. In the present paper, we first unveiled that the same post-transcriptional processing in FTZ-F1 occurred in coleopterans, lepidopterans, dipterans and hymenopterans. We then found that αFTZ-F1 and βFTZ-F1 were actively transcribed throughout the development, from embryo to adult, in Henosepilachna vigintioctopunctata. Moreover, by RNA interference, we confirmed that both FTZ-F1 isoforms act as regulators in larval–larval molting and βFTZ-F1 is involved in the regulation of the larval–pupal transition. Abstract Fushi Tarazu Factor 1 (FTZ-F1), a member of the nuclear receptor superfamily, is the downstream factor of 20-hydroxyecdysone signaling. In Drosophila melanogaster, alternative transcription start and splicing in the FTZ-F1 gene generate αFTZ-F1 and βFTZ-F1 isoforms, which are vital for pair-rule segmentation in early embryogenesis and post-embryonic development, respectively. However, whether the same mRNA isoforms are present and exert the conservative roles remains to be clarified in other insects. In the present paper, we first mined the genomic data of representative insect species and unveiled that the same post-transcriptional processing in FTZ-F1 occurred in coleopterans, lepidopterans, dipterans and hymenopterans. Our expression data in Henosepilachna vigintioctopunctata, a serious polyphagous defoliator damaging a wide range of crops in Solanaceae and Cucurbitaceae, showed that both αFTZ-F1 and βFTZ-F1 were actively transcribed throughout the development, from embryo to adult. The RNA interference-aided knockdown of both isoforms completely arrested larval ecdysis from the third to the fourth instar, in contrast to the depletion of either isoform. In contrast, silencing βFTZ-F1, rather than αFTZ-F1, severely impaired the larval–pupal transformation. We accordingly propose that both FTZ-F1 isoforms are essential but mutually interchangeable for larval–larval molting, while βFTZ-F1 is necessary for the larval–pupal transition and sufficient to exert the role of both FTZ-F1s during larval–pupal metamorphosis in H. vigintioctopunctata.
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Ahmed MAI, Vogel CFA, Malafaia G. Short exposure to nitenpyram pesticide induces effects on reproduction, development and metabolic gene expression profiles in Drosophila melanogaster (Diptera: Drosophilidae). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 804:150254. [PMID: 34798758 PMCID: PMC8767978 DOI: 10.1016/j.scitotenv.2021.150254] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 06/13/2023]
Abstract
Although the toxicity of neonicotinoid insecticides has been demonstrated in several studies, the information on metabolism, behavior, and health risk remains limited and has raised concerns about its potential toxicity. Thus, in this study we assessed the effects of nitenpyram using different sublethal concentrations (one-third and one-tenth of the acute LC50 values) on various developmental and metabolic parameters from gene expression regulation in Drosophila melanogaster (model system used worldwide in ecotoxicological studies). As a result, nitenpyram sublethal concentrations prolonged the developmental time for both pupation and eclosion. Additionally, nitenpyram sublethal concentrations significantly decreased the lifespan, pupation rate, eclosion rate, and production of eggs of D. melanogaster. Moreover, the mRNA expression of genes relevant for development and metabolism was significantly elevated after exposure. Mixed function oxidase enzymes (Cyp12d1), (Cyp9f2), and (Cyp4ae1), hemocyte proliferation (RyR), and immune response (IM4) genes were upregulated, whereas lifespan (Atg7), male mating behavior (Ple), female fertility (Ddc), and lipid metabolism (Sxe2) genes were downregulated. These findings support a solid basis for further research to determine the hazardous effects of nitenpyram on health and the environment.
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Affiliation(s)
- Mohamed Ahmed Ibrahim Ahmed
- Plant Protection Department, Faculty of Agriculture, Assiut University, Assiut 71526, Egypt; Center for Health and the Environment, Department of Environmental Toxicology, University of California, Davis, CA 95616, USA
| | - Christoph Franz Adam Vogel
- Center for Health and the Environment, Department of Environmental Toxicology, University of California, Davis, CA 95616, USA
| | - Guilherme Malafaia
- Biological Research Laboratory, Post-graduation Program in Conservation of Cerrado Natural Resources, Goiano Federal Institute - Urutaí Campus, GO, Brazil; Post-graduation Program in Biotechnology and Biodiversity, Goiano Federal Institution and Federal University of Goiás, GO, Brazil; Post-graduation Program in Ecology and Conservation of Natural Resources, Federal University of Uberlândia, Uberlândia, MG, Brazil.
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Li G, Lan H, Lu Q, He C, Wei Y, Mo D, Qu D, Xu K. The JH-Met2-Kr-h1 pathway is involved in pyriproxyfen-induced defects of metamorphosis and silk protein synthesis in silkworms, Bombyx mori. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 179:104980. [PMID: 34802530 DOI: 10.1016/j.pestbp.2021.104980] [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: 05/11/2021] [Revised: 10/19/2021] [Accepted: 10/23/2021] [Indexed: 06/13/2023]
Abstract
Environmental residues of pryriproxyfen, a juvenile hormone analogue (JHA) type pesticide, may have on unintended consequences on non-target insects. However, the mechanism of pyriproxyfen action and silk protein synthesis in silkworms has not been reported. In the present study, we treated the silkworms with trace pyriproxyfen (1 × 10-4 mg/L) and found that the silkworm larvae showed no obvious poisoning symptoms, while the development of silk glands and cocoon-forming function were both seriously damaged due to the accumulation of pyriproxyfen in posterior silk gland (PSG). The titer of the juvenile hormone (JH) was increased, whereas the content of 20-hydroxyecdysone (20E) was reduced in pyriproxyfen-exposed hemolymph. Met2 is a component of the JH receptor complex and JH can promote its phosphorylation. We found Met2 and SRC were up-regulated in the larval stage after pyriproxyfen exposure, the JH-Met2/SRC complex led to the up-regulation of downstream genes Kr-h1, and Dimm, and then specifically inhibited the transcription of Fib-H. Meanwhile, the transcription of ecdysone inducible transcription factor Br-C Z4 was also inhibited by pyriproxyfen and resulted in the defects of metamorphosis. In conclusion, the trace pyriproxyfen could affect the metamorphosis and silk protein synthesis through the Met2-mediated pathway. Our study provided new evidence that Met2 might be a potential target gene of JHA in Lepidoptera.
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Affiliation(s)
- Guoli Li
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Huangli Lan
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Qingyu Lu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Chunhui He
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Yuting Wei
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Danmei Mo
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Dacai Qu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China; Sericulture Institute of Guangxi University, Guangxi University, Nanning, Guangxi 530004, PR China
| | - Kaizun Xu
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China; Sericulture Institute of Guangxi University, Guangxi University, Nanning, Guangxi 530004, PR China; National Demonstration Center for Experimental Plant Science Education, College of Agriculture, Guangxi University, Nanning, Guangxi 530004, PR China.
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Lu Z, Ye W, Feng P, Dai M, Bian D, Ren Y, Zhu Q, Mao T, Su W, Li F, Sun H, Wei J, Li B. Low concentration acetamiprid-induced oxidative stress hinders the growth and development of silkworm posterior silk glands. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2021; 174:104824. [PMID: 33838717 DOI: 10.1016/j.pestbp.2021.104824] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 03/05/2021] [Accepted: 03/07/2021] [Indexed: 06/12/2023]
Abstract
Acetamiprid is a new type of nicotinic insecticide that is widely used in pest control. Its environmental residues may cause silkworm cocooning disorder. In this study, silkworms that received continuous feeding of low concentration acetamiprid (0.15 mg/L) showed significantly decreased silk gland index and cocooning rate. Gene expression profiling of posterior silk glands (PSGs) revealed that the differentially expressed genes were significantly enriched in oxidative stress-related signal pathways with significant up-regulation. The contents of both H2O2 and MDA were increased, along with significantly elevated SOD and CAT activities, all of which reached maximal values at 48 h when H2O2 and MDA's contents were 10.46 and 7.98 nmol/mgprot, respectively, and SOD and CAT activities were 5.51 U/mgprot and 33.48 U/gprot, respectively. The transcription levels of antioxidant enzyme-related genes SOD, Mn-SOD, CuZn-SOD, CAT, TPX and GPX were all up-regulated, indicating that exposure to low concentration acetamiprid led to antioxidant response in silkworm PSG. The key genes in the FoxO/CncC/Keap1 signaling pathway that regulates antioxidant enzyme activity, FoxO, CncC, Keap1, NQO1, HO-1 and sMaf were all up-regulated during the whole process of treatment, with maximal values being reached at 72 h with 2.91, 1.46, 1.82, 2.52, 2.32 and 4.01 times of increases, respectively. These results demonstrate that exposure to low concentration acetamiprid causes oxidative stress in silkworm PSG, which may be the cause of cocooning disorder in silkworm. Our study provides a reference for the safety evaluation of environmental residues of acetamiprid on non-target insects.
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Affiliation(s)
- Zhengting Lu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Wentao Ye
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Piao Feng
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Minli Dai
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Dandan Bian
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yuying Ren
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Qingyu Zhu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Tingting Mao
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Wujie Su
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Fanchi Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Haina Sun
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Jing Wei
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Bing Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
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