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de Resende PE, Nisler J, Voller J, Kadlecová A, Gibbons S. Antimicrobial and anthelmintic activities of aryl urea agents. J Glob Antimicrob Resist 2023; 33:114-119. [PMID: 36906171 DOI: 10.1016/j.jgar.2023.02.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 01/03/2023] [Accepted: 02/23/2023] [Indexed: 03/12/2023] Open
Abstract
OBJECTIVES This study aimed to characterise compounds with activity against carbapenemase-expressing Gram-negative bacteria and nematodes and evaluate their cytotoxicity to non-cancerous human cells. METHODS The antimicrobial activity and toxicity of a series of phenyl-substituted urea derivatives were evaluated using broth microdilution, chitinase, and resazurin reduction assays. RESULTS The effects of different substitutions present on the nitrogen atoms of the urea backbone were investigated. Several compounds were active against Staphylococcus aureus and Escherichia coli control strains. Specifically, derivatives 7b, 11b, and 67d exhibited antimicrobial activity against Klebsiella pneumoniae 16, a carbapenemase-producing Enterobacteriaceae species, with minimum inhibitory concentration (MIC) values of 100, 50, and 72 µM (32, 64, and 32 mg/L), respectively. In addition, the MICs obtained against a multidrug-resistant E. coli strain were 100, 50, and 36 µM (32, 16, and 16 mg/L) for the same compounds, respectively. Furthermore, the urea derivatives 18b, 29b, 50c, 51c, 52c, 55c-59c, and 62c were very active towards the nematode Caenorhabditis elegans. CONCLUSIONS Testing on non-cancerous human cell lines suggested that some of the compounds have the potential to affect bacteria, especially helminths, with limited cytotoxicity to humans. Given the simplicity of synthesis for this class of compounds and their potency against Gram-negative, carbapenemase-expressing K. pneumoniae, aryl ureas possessing the 3,5-dichloro-phenyl group certainly warrant further investigation to exploit their selectivity.
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Affiliation(s)
- Pedro Ernesto de Resende
- School of Pharmacy, Faculty of Science, University of East Anglia, Norwich Research Park, Norwich, United Kingdom.
| | - Jaroslav Nisler
- Isotope Laboratory, Institute of Experimental Botany, The Czech Academy of Sciences, Prague, Czech Republic
| | - Jiří Voller
- Department of Experimental Biology, Faculty of Science, Palacký University, Olomouc, Czech Republic; Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, Olomouc, Czech Republic
| | - Alena Kadlecová
- Department of Experimental Biology, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | - Simon Gibbons
- Centre for Natural Products Discovery (CNPD), School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, United Kingdom
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Liu J, Huang L, Wan M, Chen G, Su M, Han F, Liu F, Xiong G, Liao X, Lu H, Li W, Cao Z. Lenvatinib induces cardiac developmental toxicity in zebrafish embryos through regulation of Notch mediated-oxidative stress generation. Environ Toxicol 2022; 37:1310-1320. [PMID: 35119177 DOI: 10.1002/tox.23485] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/17/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Due to an increasing number of abused drugs dumped into the wastewater, more and more drugs are detected in the water environment, which may affect the survival of aquatic organisms. Lenvatinib is a multi-targeted tyrosine kinase inhibitor, and is clinically used to treat differentiated thyroid cancer, renal epithelial cell carcinoma and liver cancer. However, there are few reports on the effects of lenvatinib in embryos development. In this study, zebrafish embryos were used to evaluate the effect of lenvatinib on cardiovascular development. Well-developed zebrafish embryos were selected at 6 h post fertilization (hpf) and exposed to 0.05 mg/L, 0.1 mg/L and 0.2 mg/L lenvatinib up to 72 hpf. The processed embryos demonstrated cardiac edema, decreased heart rate, prolonged SV-BA distance, inhibited angiogenesis, and blocked blood circulation. Lenvatinib caused cardiac defects in the whole stage of cardiac development and increased the apoptosis of cardiomyocyte. Oxidative stress in the processed embryos was accumulated and inhibiting oxidative stress could rescue cardiac defects induced by lenvatinib. Additionally, we found that lenvatinib downregulated Notch signaling, and the activation of Notch signaling could rescue cardiac developmental defects and downregulate oxidative stress level induced by lenvatinib. Our results suggested that lenvatinib might induce cardiac developmental toxicity through inducing Notch mediated-oxidative stress generation, raising concerns about the harm of exposure to lenvatinib in aquatic organisms.
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Affiliation(s)
- Jieping Liu
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, Fujian, China
| | - Ling Huang
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, Fujian, China
| | - Mengqi Wan
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Guilan Chen
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Meile Su
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Fang Han
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, Fujian, China
| | - Fasheng Liu
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Guanghua Xiong
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Xinjun Liao
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Huiqiang Lu
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
| | - Wanbo Li
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture and Rural Affairs, Jimei University, Xiamen, Fujian, China
| | - Zigang Cao
- Jiangxi Engineering Laboratory of Zebrafish Modeling and Drug Screening for Human Diseases, Jinggangshan University, Ji'an, Jiangxi, China
- Jiangxi Key Laboratory of Developmental Biology of Organs, College of Life Sciences, Jinggangshan University, Ji'an, Jiangxi, China
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Abdalla HB, Napimoga MH, Teixeira JM, Trindade-da-Silva CA, Pieroni VL, Dos Santos Araújo FSM, Hammock BD, Clemente-Napimoga JT. Soluble epoxide hydrolase inhibition avoid formalin-induced inflammatory hyperalgesia in the temporomandibular joint. Inflammopharmacology 2022; 30:981-990. [PMID: 35303234 DOI: 10.1007/s10787-022-00965-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 03/02/2022] [Indexed: 11/27/2022]
Abstract
Epoxyeicosatrienoic acids (EETs) are endogenous molecules that exerts effective antinociceptive and resolutive actions. However, because of their rapid metabolism by the soluble epoxide hydrolase (sEH), EETs are unable to remain bioavailable. Therefore, the aim of this study was to investigate whether local sEH inhibition could prevent inflammatory hyperalgesia in the temporomandibular joint (TMJ) of rats. For that, rats were pre-treated with an intra-TMJ injection of TPPU, followed by the noxious stimulus (1.5% of formalin intra-articular) to evaluate nociceptive behavior. Histological analysis was conducted to explore the inflammatory exudate and mast cell degranulation. Periarticular tissue over the TMJ was used to measure inflammatory lipids and cytokines/chemokine by Enzyme-Linked Immunosorbent Assay (ELISA). We demonstrated that peripheral pretreatment with TPPU prevents formalin-induced inflammatory hyperalgesia in the TMJ, and this effect is strictly local. Moreover, TPPU mitigates the leukocyte exudate in the TMJ, as well as inflammatory lipids mediators. Mast cell number and degranulation were abrogated by TPPU, and the inflammatory cytokine levels were decreased by TPPU. On the other hand, TPPU up-regulated the release of interleukin 10 (IL-10), an anti-inflammatory cytokine. We provide evidence that locally sEH by intra-TMJ injection of TPPU produces an antinociceptive and anti-inflammatory effect on rats' TMJ.
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Affiliation(s)
- Henrique Ballassini Abdalla
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
| | - Marcelo Henrique Napimoga
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
| | - Juliana Maia Teixeira
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
| | - Carlos Antônio Trindade-da-Silva
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Victor Luís Pieroni
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
| | - Fernanda Souto Maior Dos Santos Araújo
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil
| | - Bruce D Hammock
- Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California, Davis, CA, USA
| | - Juliana Trindade Clemente-Napimoga
- Faculdade São Leopoldo Mandic, Instituto de Pesquisas São Leopoldo Mandic, Laboratoy of Neuroimmune Interface of Pain Research, Rua José Rocha Junqueira, 13-Swift, Campinas, SP, CEP: 13405-755, Brazil.
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Hasan Alshammari A, Masuo Y, Fujita KI, Shimada K, Iida N, Wakayama T, Kato Y. Discrimination of hand-foot skin reaction caused by tyrosine kinase inhibitors based on direct keratinocyte toxicity and vascular endothelial growth factor receptor-2 inhibition. Biochem Pharmacol 2022; 197:114914. [PMID: 35041812 DOI: 10.1016/j.bcp.2022.114914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/07/2022] [Accepted: 01/10/2022] [Indexed: 11/19/2022]
Abstract
Tyrosine kinase inhibitors (TKIs) are molecular-targeted anticancer drugs. Their benefits are limited by dermal toxicities, including hand-foot skin reaction (HFSR), which is commonly found in skin areas subjected to friction. The present study aimed to explain the incidence of HFSR in patients treated with TKIs by focusing on keratinocyte toxicity and inhibition of vascular endothelial growth factor receptor (VEGFR), which plays an essential role in angiogenesis. Mice with gene knockout for the immunosuppressive cytokine interleukin-10 exhibited HFSR-like phenotypes, such as cytotoxicity in keratinocytes and increased number and size of blood vessels after repeated doses of regorafenib, sorafenib, and pazopanib, all of which cause high incidence of HFSR, in combination with tape-stripping mimicking skin damage at the friction site. Comprehensive examination of the direct cytotoxic effects of 21 TKIs on primary cultured human keratinocytes revealed that 18 of them reduced the cell viability dose-dependently. Importantly, the ratio of the trough concentration in patients (Ctrough) to the LC50 values of cell viability reduction was higher than unity for four HFSR-inducing TKIs, suggesting that these TKIs cause keratinocyte toxicity at clinically relevant concentrations. In addition, eight HFSR-inducing TKIs caused inhibition of VEGFR-2 kinase activity, which was validated by their ratios of Ctrough to the obtained IC50,VEGFR-2 of more than unity. All 12 TKIs with no reported incidence of HFSR exhibited less than unity values for both Ctrough/LC50,keratinocytes and Ctrough/IC50,VEGFR-2. These results suggested that a combination of keratinocyte toxicity and VEGFR-2 inhibition may explain the incidence of HFSR upon TKI usage in humans.
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Affiliation(s)
- Aya Hasan Alshammari
- Faculty of Pharmacy, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Yusuke Masuo
- Faculty of Pharmacy, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Ken-Ichi Fujita
- Showa University School of Pharmacy, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kazuhiro Shimada
- Faculty of Pharmacy, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
| | - Noriho Iida
- Department of Gastroenterology, Graduate School of Medicine, Kanazawa University, Kanazawa 920-8641, Japan
| | - Tomohiko Wakayama
- Department of Histology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yukio Kato
- Faculty of Pharmacy, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
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Wang Q, Su H, Yue N, Li M, Li C, Wang J, Jin F. Dissipation and risk assessment of forchlorfenuron and its major metabolites in oriental melon under greenhouse cultivation. Ecotoxicol Environ Saf 2021; 225:112700. [PMID: 34500385 DOI: 10.1016/j.ecoenv.2021.112700] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 08/12/2021] [Accepted: 08/23/2021] [Indexed: 06/13/2023]
Abstract
Forchlorfenuron is a widely used plant growth regulator. The uptake of forchlorfenuron and its major metabolites poses a potential risk for human health. However, little is known about the dissipation of forchlorfenuron and its major metabolites in agricultural food. In this study, the metabolite 4-hydroxyphenyl-forchlorfenuron was first identified in oriental melon, which exhibited the highest level of residues of 4.42-5.12 μg/kg on the 4-7th days after application. Forchlorfenuron was found to be dissipated rapidly in melon at the recommended application rates, with half-lives ranging from 1.20 to 1.33 days. The rate of dissipation of 4-hydroxyphenyl-forchlorfenuron was greater than that of metabolism from forchlorfenuron in the oriental melon. However, the other metabolite, 3-hydroxyphenyl-forchlorfenuron, was not detected in oriental melon. The risk assessment showed that the acute and chronic dietary exposure risks of forchlorfenuron in oriental melon were 0.0011-0.0037% and 0.06-0.12%, respectively, suggesting little health risk to Chinese consumers.
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Affiliation(s)
- Qi Wang
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Hang Su
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ning Yue
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Minjie Li
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Chunmei Li
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jing Wang
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Fen Jin
- Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standards & Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, Beijing, China.
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6
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Shan T, Zhang X, Guo C, Guo S, Zhao X, Yuan Y, Yue T. Identity, Synthesis, and Cytotoxicity of Forchlorfenuron Metabolites in Kiwifruit. J Agric Food Chem 2021; 69:9529-9535. [PMID: 34382788 DOI: 10.1021/acs.jafc.1c02492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Forchlorfenuron (CPPU) is a plant growth regulator widely used in kiwifruit production. Although research on the toxicological and environmental effects of CPPU is well-established, the nature and toxicological properties of its metabolites are much less well-known. Using high resolution mass spectrometry and nuclear magnetic resonance, the CPPU previously unidentified metabolites in Xuxiang and Jinyan kiwifruit were identified as N-(2-chloro-4-pyridinyl)-N'-(2-hydroxy-4-methoxyphenyl)-urea (metabolite 1) and N-phenyl-N'-4-pyridinylurea (metabolite 2, CAS: 1932-35-0). Their structures were confirmed by synthesis (metabolite 1) and by comparison with a commercial standard (metabolite 2). Quantitative studies demonstrate that CPPU and its metabolites are mainly retained in the kiwifruit peel, while the content is dependent on the nature of the peel surface, with the smoother peel of Jinyan kiwifruit retaining smaller amounts of the compound. Cell viability experiments in Caco2 and Lo2 cells show that the metabolites may have a lower cytotoxicity compared to the parent compound CPPU.
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Affiliation(s)
- Tingting Shan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
| | - Xiao Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
| | - Chunfeng Guo
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
| | - Shihuan Guo
- College of Food Science and Technology, Northwest University, Xian 710000, China
| | - Xubo Zhao
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture, Yangling 712100, China
- National Engineering Research Center of Agriculture Integration Test (Yangling), Yangling 712100, China
- College of Food Science and Technology, Northwest University, Xian 710000, China
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Santorum M, Gastelbondo-Pastrana BI, Scudeler EL, Santorum M, Costa RM, Carvalho Dos Santos D. Reproductive toxicity of Novaluron in Bombyx mori (Lepidoptera: Bombycidae) and its impact on egg production. Chemosphere 2021; 273:129592. [PMID: 33493814 DOI: 10.1016/j.chemosphere.2021.129592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 06/12/2023]
Abstract
Bombyx mori was used as a model to evaluate the reproductive toxicity of Novaluron in insects. Morphological analyses of the testes and ovaries of B. mori throughout their life cycle revealed important alterations in the germ and somatic cells involved in spermatogenesis and oogenesis. We observed in all testicular developmental phases that Novaluron affected not only the organization, distribution and development of the cysts containing male germ cells, but also the morphological features of cell death. Similar cellular characteristics were found in the treated B. mori ovaries, suggesting the occurrence of cell death in both organs, in addition to a significant reduction in oviposition of eggs by female moths. We demonstrated reproductive toxicity of Novaluron to the nontarget beneficial insect silkworm, thus providing a theoretical basis for revealing the reproductive toxicity of this insecticide to other nontarget beneficial insects.
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Affiliation(s)
- Marilucia Santorum
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil.
| | - Bertha Irina Gastelbondo-Pastrana
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil; Department of Medicine, School of Health Sciences, Medical and Pharmaceutical Sciences Group, University of Sucre, Sincelejo, Sucre, CP, 700003, Colombia
| | - Elton Luiz Scudeler
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil
| | - Márcia Santorum
- Postgraduate in Agricultural Engineering, State University of Western Paraná, (UNIOESTE), Cascavel, PR, Brazil
| | - Rose Meire Costa
- Center for Biological and Health Sciences, State University of Western Paraná (UNIOESTE), Cascavel, PR, Brazil
| | - Daniela Carvalho Dos Santos
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, SP, Brazil; Electron Microscopy Center at the Institute of Biosciences of Botucatu, UNESP, SP, Brazil
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8
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Varga M, Žurga P, Brusić I, Horvatić J, Moslavac M. Growth inhibition and recovery patterns of common duckweed Lemna minor L. after repeated exposure to isoproturon. Ecotoxicology 2020; 29:1538-1551. [PMID: 32797394 DOI: 10.1007/s10646-020-02262-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/30/2020] [Indexed: 06/11/2023]
Abstract
Aquatic non-targeted organisms are more likely to be exposed to herbicides in multiple pulse events then long continuous exposure. The potential of an organism to recover between exposures has an important role in the overall effects of the toxicant. Common duckweeds show high potential for recovery after a single exposure to isoproturon. To evaluate the growth patterns and recovery potential between multiple exposures, L. minor plants were exposed to isoproturon in three repetitive 7-day treatment cycles in three time-variable exposure scenarios with equivalent time-weighted average concentrations. The growth was significantly inhibited during each exposure phase with significant cumulative effects in every subsequent treatment cycle resulting in a cumulative decrease in biomass production. However, inhibitory effects were reversible upon transferring plants to a herbicide-free nutrient solution. These results indicate that L. minor plants have a high recovery potential even after multiple exposures to isoproturon. Observed cumulative decrease in biomass production, as well as the potential for fast and efficient recovery from repeated herbicide exposure, might affect the competitiveness of L. minor in surface water communities. The observations made during each exposure period, recovery patterns, and the resulting cumulative effects over time may contribute to further development, calibration and validation of mechanistic toxicokinetic/toxicodynamic models for simulating the effects of pesticides on aquatic plants populations in the laboratory and environmental conditions.
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Affiliation(s)
- Martina Varga
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000, Osijek, Croatia.
| | - Paula Žurga
- Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52, 51000, Rijeka, Croatia
| | - Iva Brusić
- Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52, 51000, Rijeka, Croatia
| | - Janja Horvatić
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000, Osijek, Croatia
| | - Marko Moslavac
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000, Osijek, Croatia
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Baillard V, Sulmon C, Bittebiere AK, Mony C, Couée I, Gouesbet G, Delignette-Muller ML, Devin S, Billoir E. Effect of interspecific competition on species sensitivity distribution models: Analysis of plant responses to chemical stress. Ecotoxicol Environ Saf 2020; 200:110722. [PMID: 32460047 DOI: 10.1016/j.ecoenv.2020.110722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 05/05/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
Species Sensitivity Distributions (SSD) are widely used in environmental risk assessment to predict the concentration of a contaminant that is hazardous for 5% of species (HC5). They are based on monospecific bioassays conducted in the laboratory and thus do not directly take into account ecological interactions. This point, among others, is accounted for in environmental risk assessment through an assessment factor (AF) that is applied to compensate for the lack of environmental representativity. In this study, we aimed to assess the effects of interspecific competition on the responses towards isoproturon of plant species representative of a vegetated filter strip community, and to assess its impact on the derived SSD and HC5 values. To do so, we realized bioassays confronting six herbaceous species to a gradient of isoproturon exposure in presence and absence of a competitor. Several modelling approaches were applied to see how they affected the results, using different critical effect concentrations and investigating different ways to handle multiple endpoints in SSD. At the species level, there was a strong trend toward organisms being more sensitive to isoproturon in presence of a competitor than in its absence. At the community level, this trend was also observed in the SSDs and HC5 values were always lower in presence of a competitor (1.12-11.13 times lower, depending on the modelling approach). Our discussion questions the relevance of SSD and AF as currently applied in environmental risk assessment.
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Affiliation(s)
| | - Cécile Sulmon
- Univ Rennes, CNRS, Ecobio [(Ecosystèmes, Biodiversité, Évolution)] - Umr 6553, F-35000, Rennes, France
| | - Anne-Kristel Bittebiere
- Université de Lyon 1, CNRS, UMR 5023 LEHNA, 43 Boulevard Du 11 Novembre 1918, Villeurbanne, Cedex, 69622, France
| | - Cendrine Mony
- Univ Rennes, CNRS, Ecobio [(Ecosystèmes, Biodiversité, Évolution)] - Umr 6553, F-35000, Rennes, France
| | - Ivan Couée
- Univ Rennes, CNRS, Ecobio [(Ecosystèmes, Biodiversité, Évolution)] - Umr 6553, F-35000, Rennes, France
| | - Gwenola Gouesbet
- Univ Rennes, CNRS, Ecobio [(Ecosystèmes, Biodiversité, Évolution)] - Umr 6553, F-35000, Rennes, France
| | - Marie Laure Delignette-Muller
- Université de Lyon, Université Lyon 1, CNRS, VetAgro Sup, UMR 5558, Laboratoire de Biométrie et Biologie Evolutive, 69622, Villeurbanne, France
| | - Simon Devin
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
| | - Elise Billoir
- Université de Lorraine, CNRS, LIEC, F-57000 Metz, France
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10
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Sigurnjak M, Ukić Š, Cvetnić M, Markić M, Novak Stankov M, Rasulev B, Kušić H, Lončarić Božić A, Rogošić M, Bolanča T. Combined toxicities of binary mixtures of alachlor, chlorfenvinphos, diuron and isoproturon. Chemosphere 2020; 240:124973. [PMID: 31726602 DOI: 10.1016/j.chemosphere.2019.124973] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 06/10/2023]
Abstract
Pesticides are the chemicals of increased concern regarding their adverse environmental effects. In particular, the reports on their joint toxicity effects are scarce in the literature. Therefore, this paper describes the experiments on toxicities of four pesticides: alachlor, chlorfenvinphos, diuron, and isoproturon, toward Vibrio fischeri. In particular, the joint toxicity effects for all possible binary combinations of the pesticides were analyzed. The analysis included the application of concentration addition and independent action models at two toxicity levels: EC10 and EC50. The analysis revealed additive behavior between all pesticide pairs. The only exception was isoproturon and chlorfenvinphos whose combination resulted in synergistic toxic activity. The original form of the logistic function was given preference over the linearized form in describing the response-dose relationships of investigated pesticides.
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Affiliation(s)
- M Sigurnjak
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - Š Ukić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia.
| | - M Cvetnić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - M Markić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - M Novak Stankov
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - B Rasulev
- North Dakota State University, Department of Coatings and Polymeric Materials, Fargo, ND, 58102, USA
| | - H Kušić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - A Lončarić Božić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - M Rogošić
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
| | - T Bolanča
- University of Zagreb, Faculty of Chemical Engineering and Technology, Marulićev Trg 19, 10000, Zagreb, Croatia
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11
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Jiang R, Wang M, Chen W, Li X, Balseiro-Romero M, Baveye PC. Ecological risk of combined pollution on soil ecosystem functions: Insight from the functional sensitivity and stability. Environ Pollut 2019; 255:113184. [PMID: 31541819 DOI: 10.1016/j.envpol.2019.113184] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Revised: 08/23/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
Assessing the ecological risk of combined pollution, especially from a holistic perspective with the consideration of the overarching functions of soil ecosystem, is crucial and beneficial to the improvement of ecological risk assessment (ERA) framework. In this study, four soils with similar physicochemical properties but contrasting heavy metals contamination levels were selected to explore changes in the integrated functional sensitivity (MSI), resistance (MRS) and resilience (MRL) of soil microbial communities subjected to herbicide siduron, based on which the ecological risk of the accumulation of siduron in the four studied soils were evaluated. The results suggested that the microbial biomass carbon, activity of denitrification enzyme and nitrogenase were indicative of MSI and MRS, and the same three parameters plus soil basal respiration were indicative of MRL. Significant dose-effect relationships between siduron residues in soils and MSI, MRS and MRL under combined pollution were observed. Heavy metal polluted soils showed higher sensitivity and lower resistance to the additional disturbance of herbicide siduron due to the lower microbial biomass, while the resilience of heavy metal polluted soils was much higher due to the pre-adaption to the chemical stresses. The quantifiable indicator microbial functional stability was incorporated in the framework of ERA and the results showed that the accumulation of siduron in the studied soils could exhibit potential harm to the integrated functional stability of soil microbial community. Thus, this work provides insights into the application of integrated function of soil microbial community into the framework of ERA.
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Affiliation(s)
- Rong Jiang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meie Wang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
| | - Weiping Chen
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China
| | - Xuzhi Li
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
| | - María Balseiro-Romero
- UMR ECOSYS, AgroParisTech, Université Paris-Saclay, Avenue Lucien Brétignières, Thiverval-Grignon, 78850, France; Department of Soil Science and Agricultural Chemistry, Universidade de Santiago de Compostela, Santiago de Compostela, 15782, Spain
| | - Philippe C Baveye
- UMR ECOSYS, AgroParisTech, Université Paris-Saclay, Avenue Lucien Brétignières, Thiverval-Grignon, 78850, France
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12
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Weber D, Weyman G, Fruhmann T, Gagniarre M, Minten B, Memmert U. Time-Variable Exposure Experiments in Conjunction with Higher Tier Population and Effect Modeling to Assess the Risk of Chlorotoluron to Green Algae. Environ Toxicol Chem 2019; 38:2520-2534. [PMID: 31343782 DOI: 10.1002/etc.4544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/21/2018] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
An algae population model was applied to describe measured effects of pulsed exposure to chlorotoluron on populations of Pseudokirchneriella subcapitata in 2 laboratory flow-through chemostat tests with different exposure regimes. Both tests enabled evaluation of adverse effects on algae during the exposure and population recovery afterward. Impacts on population densities after chlorotoluron exposure were directly visible as biomass loss in the chemostats. Recovery was observed after each exposure peak. The test results indicate that P. subcapitata is unlikely to show an increased sensitivity to chlorotoluron after pulsed exposure. No altered response or adaptation of the algae to chlorotoluron was observed, with the exception of the last high peak in flow-through test 2. Therefore, an adaptation to the test substance cannot be excluded after long-term exposure. However, recovery to the steady-state level after this peak indicates that the growth rate (fitness) was not significantly reduced in the population with higher tolerance. No differences in chlorotoluron impact on the populations over time in terms of growth were detected. Model predictions agreed well with the measured data. The tests and modeling results validate the model to simulate population dynamics of P. subcapitata after pulsed exposure to chlorotoluron. Model predictions and extrapolations with different exposure patterns are considered reliable for chlorotoluron. The good reproducibility of the population behavior in the test systems supports this conclusion. An example modeled extrapolation of the experimental results to other (untested) exposure scenarios shows a potential approach to using the validated model as a supportive tool in risk assessment. Environ Toxicol Chem 2019;38:2520-2534. © 2019 SETAC.
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Affiliation(s)
- Denis Weber
- Eurofins Regulatory, Rheinfelden, Switzerland
| | - Gabriel Weyman
- Adama Agricultural Solutions UK, Thatcham, Berkshire, United Kingdom
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13
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Park S, Lee JY, Park H, Song G, Lim W. Toxic effects of flufenoxuron on development and vascular formation during zebrafish embryogenesis. Aquat Toxicol 2019; 216:105307. [PMID: 31557631 DOI: 10.1016/j.aquatox.2019.105307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/17/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
Flufenoxuron, a chitin synthesis inhibitor that is widely used in developed countries as an insecticide, is rarely degraded in the environment. In addition to that in insects, flufenoxuron-mediated non-targeted death in organisms such as lizards and bees has been reported. However, the toxic effects of this compound on vascular development during embryogenesis, as well as the underlying mechanism, have not yet been elucidated. In the present study, we assessed abnormal development and cardiovascular damage induced by flufenoxuron in zebrafish embryos. Exposed zebrafish had malformed eyes and pathological characteristics such as heart and yolk sac edema. In accordance with developmental inhibition, cell cycle regulatory genes were dysregulated in zebrafish embryos upon exposure to flufenoxuron. We also discovered that this agent can disrupt vascular formation by interfering with angiogenesis-associated genes including the genes encoding vascular endothelial growth factor Aa (vegfaa), vegfc, fms-related tyrosine kinase 1 (flt1), and flt4 in zebrafish embryos. These anti-angiogenic effects of flufenoxuron were further verified using a well-known angiogenesis model, namely human umbilical vein endothelial cells. In conclusion, our results suggest that flufenoxuron inhibits overall development and angiogenesis during embryogenesis.
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Affiliation(s)
- Sunwoo Park
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Jin-Young Lee
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Hahyun Park
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Gwonhwa Song
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
| | - Whasun Lim
- Department of Food and Nutrition, Kookmin University, Seoul, 02707, Republic of Korea.
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14
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Gong G, Kam H, Tse Y, Lee SM. Cardiotoxicity of forchlorfenuron (CPPU) in zebrafish (Danio rerio) and H9c2 cardiomyocytes. Chemosphere 2019; 235:153-162. [PMID: 31255755 DOI: 10.1016/j.chemosphere.2019.06.027] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 06/01/2019] [Accepted: 06/03/2019] [Indexed: 06/09/2023]
Abstract
Forchlorfenuron (CPPU), as a plant growth regulator or herbicide/pesticide, is widely used in agriculture worldwide. It is adopted by most farmers due to its high efficacy for boosting size and improving the quality of fruit. However, CPPU was implicated in, and gained notoriety due to an incident of exploding watermelon that occurred in 2011. Subsequently, the wider community became aware of the potential risks it posed to living organisms and the ecosystem. In this study, we evaluated the effects of CPPU on the survival, cardiac morphology and function, as well as hematopoietic system, of zebrafish (Danio rerio). Notably, CPPU (2.5-12.5 μg/ml) induced cardiac morphology deformation, cardiac contractile dysfunction and erythrocyte reduction in zebrafish. Consistently, the mRNA expression levels of several cardiac and hematopoietic gene markers (myl7, gata4, mef2c, amhc, vmhc and gata1) were altered by CPPU treatment. In addition, CPPU caused cytotoxicity, cytoskeleton destruction and reduced corresponding proteins (Myl7, Gata4 and Mef2c) expression in H9c2 cardiomyocytes in vitro. Taken together, this study has identified the cardiotoxicity of CPPU in different experimental models and enhanced our understanding on the mechanism underlying the toxicity of CPPU to living organisms.
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Affiliation(s)
- Guiyi Gong
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macau, China; Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Hiotong Kam
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Yuchung Tse
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, 518055, China
| | - Simon Mingyuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macau, China.
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15
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Bu Q, Wang X, Xie H, Zhong K, Wu Y, Zhang J, Wang Z, Gao H, Huang Y. 180 Day Repeated-Dose Toxicity Study on Forchlorfenuron in Sprague-Dawley Rats and Its Effects on the Production of Steroid Hormones. J Agric Food Chem 2019; 67:10207-10213. [PMID: 31426637 DOI: 10.1021/acs.jafc.9b03855] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Forchlorfenuron (FCF) is a synthetic plant cytokine-like growth regulator that is massively used in agriculture to increase fruit size and weight. There is an insufficiency of published data on the safety profile of FCF, especially as it is involved in ovarian function. In our study, a chronic toxicity study on FCF was conducted and designed by feeding at dosage levels of 0, 0.6, and 60 mg/kg body weight in Sprague-Dawley rats for 180 days. During the 180 day FCF administration, no biologically relevant changes were observed in the body weight, clinical signs, food consumption, organ weight, hematology, and clinical biochemistry of the tested animals. However, macroscopic and microscopic evaluations revealed the presence of severe hydrometra in the uterus and pathological changes in the ovaries. In addition, it was found that FCF inhibited the proliferation of granulosa cells (GCs) and H295R cells, as well as downregulated the expression of CYP17A1 and CYP19A1 in estradiol and progesterone production, resulting in decreased steroidogenesis in GCs and H295R cells. Taken together, our findings suggest that FCF has potential adverse effects on the ovaries and on steroidogenesis.
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Affiliation(s)
- Qian Bu
- Department of Food Science and Technology, College of Biomass and Engineering and Healthy Food Evaluation Research Center , Sichuan University , Chengdu 610065 , China
| | | | | | - Kai Zhong
- Department of Food Science and Technology, College of Biomass and Engineering and Healthy Food Evaluation Research Center , Sichuan University , Chengdu 610065 , China
| | - Yanping Wu
- Department of Food Science and Technology, College of Biomass and Engineering and Healthy Food Evaluation Research Center , Sichuan University , Chengdu 610065 , China
| | - Jiaqi Zhang
- Department of Food Science and Technology, College of Biomass and Engineering and Healthy Food Evaluation Research Center , Sichuan University , Chengdu 610065 , China
| | | | - Hong Gao
- Department of Food Science and Technology, College of Biomass and Engineering and Healthy Food Evaluation Research Center , Sichuan University , Chengdu 610065 , China
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16
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Varga M, Horvatić J, Žurga P, Brusić I, Moslavac M. Phytotoxicity assessment of isoproturon on growth and physiology of non-targeted aquatic plant Lemna minor L. - A comparison of continuous and pulsed exposure with equivalent time-averaged concentrations. Aquat Toxicol 2019; 213:105225. [PMID: 31220755 DOI: 10.1016/j.aquatox.2019.105225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 06/09/2023]
Abstract
Phenylurea herbicides are often present in the aquatic ecosystems and may be accumulated by the non-targeted organisms and impose a negative effect on the organism and the community. This study aims to investigate and compare the effects of two different isoproturon (IPU) pulse exposure scenarios on the non-targeted aquatic plant Lemna minor with effects observed in the standard test with continuous exposure. The obtained results showed that continuous IPU treatment causes significant reduction of photosynthetic pigment concentration and proteins as well as inhibition of L. minor growth. The activities of CAT, G-POX, and APX were significantly induced to diminish the accumulation of ROS under IPU treatment, but the induction of antioxidant enzymes was not sufficient to protect the plants from herbicide-induced oxidative stress. The growth of L. minor under pulse exposure to IPU recovers fast, but pulse treatment results in significant physiological changes in treated plants. The accumulation of H2O2 and lipid peroxidation products, alongside the reduced concentration of proteins and photosynthetic pigments in pulse treatment after a recovery period, indicates that IPU causes prolonged oxidative stress in L. minor plants. The recovery potential of L. minor plants after treatment with herbicides may have an important role in maintaining the population of essential primary producers in aquatic ecosystems, but IPU-induced physiological changes could potentially have a significant role in modulating the response of the plants to the next exposure event.
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Affiliation(s)
- Martina Varga
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
| | - Janja Horvatić
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia
| | - Paula Žurga
- Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52, 51000 Rijeka, Croatia
| | - Iva Brusić
- Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52, 51000 Rijeka, Croatia
| | - Marko Moslavac
- University of Osijek, Department of Biology, Ulica cara Hadrijana 8/A, HR-31000 Osijek, Croatia
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17
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Serbian I, Schwarzenberger P, Loesche A, Hoenke S, Al-Harrasi A, Csuk R. Ureidobenzenesulfonamides as efficient inhibitors of carbonic anhydrase II. Bioorg Chem 2019; 91:103123. [PMID: 31336306 DOI: 10.1016/j.bioorg.2019.103123] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/04/2019] [Accepted: 07/11/2019] [Indexed: 01/13/2023]
Abstract
Sulfonamides represent an important class of drugs because of their inhibitory effect on carbonic anhydrases (CAs). We therefore synthesized several ureidobenzenesulfonamides and evaluated their bCA II inhibition for their potential use as anti-glaucoma gents. Since these compounds must not show cytotoxic effects, their cytotoxic potential against several human tumor cell lines and non-malignant fibroblasts was investigated. Several fluorophenyl substituted sulfonamides were efficient inhibitors of bCA II. Only one benzylphenyl substituted sulfonamide, however, showed a remarkable selectivity for HT29 colorectal carcinoma cells while being significantly less cytotoxic to non-malignant fibroblasts.
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Affiliation(s)
- Immo Serbian
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Philipp Schwarzenberger
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Anne Loesche
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Sophie Hoenke
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany
| | - Ahmed Al-Harrasi
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, PO Box 33, Birkat Al-Mauz, Nizwa, Oman
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes-Str. 2, D-06120 Halle (Saale), Germany.
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18
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Santorum M, Brancalhão RMC, Guimarães ATB, Padovani CR, Tettamanti G, Dos Santos DC. Negative impact of Novaluron on the nontarget insect Bombyx mori (Lepidoptera: Bombycidae). Environ Pollut 2019; 249:82-90. [PMID: 30878865 DOI: 10.1016/j.envpol.2019.02.095] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 01/31/2019] [Accepted: 02/26/2019] [Indexed: 05/28/2023]
Abstract
Due to increased use of agrochemicals and growing concerns about ecotoxicology, the development of new insecticides, moving away from those with neurotoxic and broad spectrum effects towards insecticides that are safer for the environment and nontarget beneficial species, has been a research priority. Novaluron stands out among these newer insecticides, is an insect growth regulator that is used for the control of insect pests in crops grown close to mulberry plantations. Mulberry serves as food for the silkworm Bombyx mori, which is a nontarget insect of great economic importance to silk production. We investigated the lethal and sublethal effects of Novaluron on the development of B. mori. Larvae were segregated into experimental groups: the control groups (CGs) and the treatment groups (TGs), which were treated with the Novaluron concentration of 0.15 mL/L. Following exposure, we analyzed: larval mortality, changes in the insect life cicle and cytotoxic effects on the midgut cells. This is the first report about the Novaluron's effects on B.mori. We detected rupture in the integument, complete cessation of feeding, late development, incomplete ecdysis and production of defective cocoons. After 240 h of exposure, there was 100% mortality in TG larvae exposed in the 3rd instar and 20% mortality from larvae exposed in the 5th instar. Cytotoxic effects was observed, such as dilation of cells, emission of cytoplasmic protrusions, extreme rarefaction of the cytoplasm and nuclei, dilation of the endoplasmic reticulum in addition to changes in mitochondria, the presence of large digestive vacuoles and intercellular spaces and the presence of active caspase. Novaluron exposure impairs the midgut and may affect the physiological functions of this organ. Novaluron additionally compromises several phases of insect development, indicating the importance of toxicology studies that utilize different life stages of nontarget species to evaluate the safe use of insecticides.
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Affiliation(s)
- Marilucia Santorum
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, Brazil
| | - Rose Meire Costa Brancalhão
- Center of Biological Sciences and Health, State University of Western Paraná, UNIOESTE, Cascavel, PR, Brazil
| | | | - Carlos Roberto Padovani
- Department of Biostatistics, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, Brazil
| | - Gianluca Tettamanti
- Department of Biotechnology and Life Sciences, University of Insubria, 21100, Varese, Italy
| | - Daniela Carvalho Dos Santos
- Laboratory of Insects, Department of Morphology, São Paulo State University (UNESP), Institute of Biosciences, Botucatu, Brazil; Electron Microscopy Center of the Institute of Biosciences of Botucatu, UNESP, SP, Brazil.
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19
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Chang J, Li W, Xu P, Guo B, Wang H. Dose-dependent effects of flufenoxuron on thyroid system of mature female lizards (Eremias argus) and their offspring. Sci Total Environ 2019; 654:714-719. [PMID: 30448662 DOI: 10.1016/j.scitotenv.2018.11.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/06/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
More and more studies are focusing on toxic effect of pesticides on lizards. However, the responses of different life-stage lizards to pesticides have not been reported. In this study, according to RNA-seq library data, thyroxine 5'-deiodinase activity showed significant difference between mature and immature lizard liver. In addition, triiodothyronine (T3) level in immature lizard serum was higher than that in mature lizard serum. Thus, we investigated the thyroid disruption of flufenoxuron with different concentrations (0, 5, 20 mg/kg) to both mature lizards and their offspring. No significant differences were observed in immature lizard body weight compared between control and exposure groups while the body weight of mature lizards was significantly decreased after flufenoxuron exposure. Moreover, the levels of thyroid hormones and the expression of thyroid related genes changed with exposure concentration of flufenoxuron and exhibited different regulation mechanism between mature and immature lizards. In immature lizard liver, trα, trβ, dio1 and ugt genes controlled the thyroid hormone levels interfered by flufenoxuron. In contrast, the thyroxine (T4) pathway in mature lizard liver was significantly disrupted especially by 20 mg/kg flufenoxuron exposure. This study elucidated the different thyroid disruption effects of flufenoxuron to lizards based on different exposure doses and lizard life stages.
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Affiliation(s)
- Jing Chang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China.
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Baoyuan Guo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Huili Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
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20
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Alves PRL, Bandeira FO, Giraldi M, Presotto R, Segat JC, Cardoso EJBN, Baretta D. Ecotoxicological assessment of Fluazuron: effects on Folsomia candida and Eisenia andrei. Environ Sci Pollut Res Int 2019; 26:5842-5850. [PMID: 30613876 DOI: 10.1007/s11356-018-4022-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
The cattle production in Brazil has increased considerably in the last years, mainly due to the control of parasite infestation of the animals, which cause loss of productivity to the sector. Fluazuron is an active ingredient (a.i.) of the benzoylurea class used to control ticks in cattle. As this a.i. has been found unchanged in animal feces, which may present a risk to edaphic organisms, this study aimed to assess the effects of fluazuron on survival, reproduction, and behavior of the soil invertebrates Folsomia candida and Eisenia andrei, through ecotoxicological assays. We carried out bioassays in a tropical artificial soil (TAS) spiked with increasing doses of the insecticide. Earthworm mortality was found only at the highest tested fluazuron concentration (LOEC = 160 mg a.i. kg-1 dry soil and NOEC = 80 mg kg-1), while the reproduction of F. candida and E. andrei was reduced at lower fluazuron concentrations (EC50 = 4.48 mg kg-1 and EC50 = 20.8 mg kg-1, respectively). Avoidance behavior was detected for both species at lower concentrations than those that caused impacts on reproduction, indicating that the substance may affect the soil habitat function. Since the possible adverse effects of fluazuron on edaphic fauna are still unknown or neglected, this study also warns about the possible harmful effect of veterinary pharmaceutical products on edaphic fauna.
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Affiliation(s)
- Paulo Roger Lopes Alves
- Federal University of Fronteira Sul, Av. Fernando Machado 108 E, Chapecó, SC, 89802-112, Brazil.
| | - Felipe Ogliari Bandeira
- Department of Soil Science, Santa Catarina State University, Av. Luis de Camões, 2090, Lages, SC, 88520-000, Brazil
| | - Maicon Giraldi
- Federal University of Fronteira Sul, Av. Fernando Machado 108 E, Chapecó, SC, 89802-112, Brazil
| | - Rosicler Presotto
- Federal University of Fronteira Sul, Av. Fernando Machado 108 E, Chapecó, SC, 89802-112, Brazil
| | - Julia Corá Segat
- Centro de Educação Superior do Oeste, Santa Catarina State University, Beloni Trombeta Zanin, 680-E, Chapecó, SC, 89815-630, Brazil
| | | | - Dilmar Baretta
- Centro de Educação Superior do Oeste, Santa Catarina State University, Beloni Trombeta Zanin, 680-E, Chapecó, SC, 89815-630, Brazil
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21
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Nagy K, Zheng C, Bolognesi C, Ádám B. Interlaboratory evaluation of the genotoxic properties of pencycuron, a commonly used phenylurea fungicide. Sci Total Environ 2019; 647:1052-1057. [PMID: 30180313 DOI: 10.1016/j.scitotenv.2018.08.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 08/02/2018] [Accepted: 08/04/2018] [Indexed: 06/08/2023]
Abstract
Pencycuron, a phenylurea-type antifungal agent, is used in agriculture worldwide for inhibiting the growth of various fungal pathogens of crops. Pencycuron residues were found in vegetables, soil and drinking water. Accordingly, both occupational and consumer exposure can be expected and may be significant. However, human toxicity studies on its genotoxic, mutagenic or carcinogenic potential are lacking. Therefore, a collaborative study was performed in two laboratories to investigate whether pencycuron exposure can induce DNA damage. The genotoxic effect of 0-100 μg/ml pencycuron in in vitro cultures of human mononuclear white blood cells (MWBCs) and human hepatocytes (HepG2) was detected by cytokinesis-block micronucleus assay and comet assay. The combined results of the two labs showed a dose-dependent DNA damage detected by micronucleus frequency, which reached statistical significance at 100 μg/ml concentration after 21-h exposure in HepG2 cells (p = 0.048). Significant genotoxic effect could also be observed in the comet assay from 50 μg/ml concentration in MWBCs, and at 100 μg/ml concentration in HepG2 cells in one lab. Nevertheless, this finding was not confirmed by the other lab in HepG2 cells, where Fpg-dependent oxidative DNA damage could also not be detected. The results indicate that pencycuron may have DNA-damaging potential as well as point out inter-laboratory variability that calls for further studies to confirm the genotoxicity of this fungicide.
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Affiliation(s)
- Károly Nagy
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary.
| | - Congying Zheng
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
| | - Claudia Bolognesi
- Environmental Carcinogenesis Unit, Ospedale Policlinico San Martino IRCCS, Genoa, Italy
| | - Balázs Ádám
- Department of Preventive Medicine, Faculty of Public Health, University of Debrecen, Debrecen, Hungary
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22
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Li X, Wang M, Chen W, Jiang R. Evaluation of combined toxicity of Siduron and cadmium on earthworm (Eisenia fetida) using Biomarker Response Index. Sci Total Environ 2019; 646:893-901. [PMID: 30235648 DOI: 10.1016/j.scitotenv.2018.07.380] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/12/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Agrochemicals and heavy metals are widespread contaminants in urban soil and could co-exist as mixture, which could cause unexpected risk to terrestrial organism. To assess the joint effect of herbicide Siduron and Cd, a battery of sub-lethal biomarkers was studied using earthworm ecotoxicological assay. Most selected biomarkers appeared significant but complicated responses with the increasing concentration of contaminants after 28-day exposure. In order to quantify the overall effect of the mixture contaminants, Biomarker Response Index (BRI) was used to integrate the multiple responses. Concentration Addition Index (CAI) and Effect Addition Index (EAI) were introduced to assess types of joint effect. Results showed significantly dose-effect responses between BRI and contaminant exposure concentrations. Integrated toxicity increased obviously under joint treatments of Siduron and Cd compared to their individual treatments. According to CAI, a clear antagonism was observed at relatively lower effects and gradually transformed to slight synergism with an increase of effects, while EAI showed the joint effect of addition at the whole range of effect levels. Thus, compared to the simple analysis of those complicated responses, BRI is an effective method to determine the integrated toxicity of mixture and its combination with joint effect indices (CAI and EAI) provides more worthy risk assessment on toxicity interaction among compounds.
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Affiliation(s)
- Xuzhi Li
- State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China; State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Meie Wang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Weiping Chen
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Rong Jiang
- State Key Laboratory of Urban and Regional Ecology, Research Centre for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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Chang J, Li J, Hao W, Wang H, Li W, Guo B, Li J, Wang Y, Xu P. The body burden and thyroid disruption in lizards (Eremias argus) living in benzoylurea pesticides-contaminated soil. J Hazard Mater 2018; 347:218-226. [PMID: 29316515 DOI: 10.1016/j.jhazmat.2018.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/19/2017] [Accepted: 01/03/2018] [Indexed: 06/07/2023]
Abstract
Dermal exposure is regarded as a potentially significant but understudied route for pesticides uptake in terrestrial reptiles. In this study, a native Chinese lizard was exposed to control, diflubenzuron or flufenoxuron contaminated soil (1.5 mg kg-1) for 35 days. Tissue distribution, liver lesions, thyroid hormone levels and transcription of most target genes were examined. The half-lives of diflubenzuron and flufenoxuron in the soil were 118.9 and 231.8 days, respectively. The accumulation of flufenoxuron in the liver, brain, kidney, heart, plasma and skin (1.4-35.4 mg kg-1) were higher than that of diflubenzuron (0-1.7 mg kg-1) at all time points. The skin permeability factor of flufenoxuron was more than 20-fold greater than that of diflubenzuron at the end of exposure. However, the liver was more vulnerable in the diflubenzuron exposure group. The alterations of triiodothyronine (T3) and thyroxine (T4) level after diflubenzuron or flufenoxuron exposure were accompanied with the changes in the transcription of target genes involved not only in hypothalamus-pituitary-thyroid (HPT) axis (sult, dio2, trα and udp) but also in metabolism system (cyp1a and ahr). These results indicated that flufenoxuron produced greater body burdens to lizards through dermal exposure, whereas both diflubenzuron and flufenoxuron have the potential to disturb metabolism and thyroid endocrine system.
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Affiliation(s)
- Jing Chang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19A, Beijing, 100049, China
| | - Jitong Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19A, Beijing, 100049, China
| | - Weiyu Hao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19A, Beijing, 100049, China
| | - Huili Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Baoyuan Guo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Jianzhong Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China.
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Li X, Li Z, Song Y, Liu W, Liu Z. The mTOR Kinase Inhibitor CZ415 Inhibits Human Papillary Thyroid Carcinoma Cell Growth. Cell Physiol Biochem 2018; 46:579-590. [PMID: 29617677 DOI: 10.1159/000488625] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 02/02/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIM Mammalian target of rapamycin (mTOR) plays an important role in papillary thyroid carcinoma (PTC) cell progression. CZ415 is a novel, highly-efficient and specific mTOR kinase inhibitor. The current study tested the potential anti-tumor activity of CZ415 in human PTC cells. METHODS The established (TPC-1 cell line) and primary human PTC cells were treated with CZ415. Cell survival and growth were tested by Cell Counting Kit-8 assay and BrdU ELISA assay, respectively. Cell apoptosis was tested by caspase-3/-9 activity assay, Hoechst-33342 staining assay and single-stranded DNA ELISA assay. Cell cycle progression was tested by propidium iodide-FACS assay. The mTOR signaling was tested by Western blotting assay and co-immunoprecipitation assay. The mouse xenograft tumor model was applied to study the effect of CZ415 in vivo. RESULTS In cultured human PTC cells, treatment with CZ415 at nM concentrations significantly inhibited cell survival and growth. CZ415 induced apoptosis activation and cell cycle arrest in human PTC cells. CZ415 disrupted assembling of mTORC1 (mTOR-Raptor association) and mTORC2 (mTOR-Rictor-GβL association) in TPC-1 cells, which led to de-phosphorylation of the mTORC1 substrates (S6K1 and 4E-BP1) and the mTORC2 substrate AKT (Ser-473). Further studies show that the autophagy inhibitor 3-methyladenine (3-MA) or Beclin-1 shRNA aggravated CZ415-induced cytotoxicity against PTC cells. In vivo, CZ415 oral administration inhibited TPC-1 xenograft tumor growth in mice. CONCLUSION Our results show that mTOR blockage by CZ415 inhibits PTC cell growth in vitro and in vivo.
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Ning X, Ku T, Gao R, Ji X, Li G, Sang N. In vitro PPARγ agonistic potential of chitin synthesis inhibitors and their energy metabolism-related hepatotoxicity. Sci Total Environ 2018; 615:1126-1132. [PMID: 29751418 DOI: 10.1016/j.scitotenv.2017.10.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/03/2017] [Accepted: 10/03/2017] [Indexed: 05/28/2023]
Abstract
The extensive use of chitin synthesis inhibitors (CSIs) in integrated pest management programs has a detrimental effect on the surrounding environment. Recent studies reveal that CSIs may affect non-target organisms at sublethal concentrations, highlighting the need for further ecological and health risk investigations of these compounds. In this study, we characterized the peroxisome proliferator-activated receptor γ (PPARγ) agonistic activity of fourteen CSIs in HepG2 cells using an in vitro reporter gene assay. Five of the tested CSIs showed remarkable PPARγ-mediated transactivation, and the relative agonistic potencies were diflubenzuron>chlorfluazuron>flucycloxuron>noviflumuron>flufenoxuron based on REC20 values. In addition, molecular docking indicated that different interactions may stabilize ligand binding to PPARγ. Next, we clarified that sublethal concentration of diflubenzuron caused a shift in cellular energy metabolism from the aerobic tricarboxylic acid (TCA) cycle to anaerobic glycolysis and this process was associated with the activation of PPARγ. These findings suggest that CSIs act as PPARγ agonists and exert diverse hepatotoxic effects by disrupting energy metabolism at sublethal concentrations.
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Affiliation(s)
- Xia Ning
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | - Tingting Ku
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | - Rui Gao
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | - Xiaotong Ji
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | - Guangke Li
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China
| | - Nan Sang
- College of Environment and Resource, Research Center of Environment and Health, Shanxi University, Taiyuan, Shanxi 030006, PR China.
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26
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Uwizeyimana H, Wang M, Chen W, Khan K. Ecotoxicological effects of binary mixtures of siduron and Cd on mRNA expression in the earthworm Eisenia fetida. Sci Total Environ 2018; 610-611:657-665. [PMID: 28822934 DOI: 10.1016/j.scitotenv.2017.07.265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 07/03/2017] [Accepted: 07/30/2017] [Indexed: 06/07/2023]
Abstract
This study aimed to investigate the eco-toxicological responses of earthworm (Eisenia fetida) exposed to combined siduron (herbicide) and cadmium (Cd). Eisenia fetida gene expressions including metallothionein (MT) and heat shock protein70 (Hsp70) were analyzed using real-time Polymerase Chain Reaction after individual and combined siduron (0.90, 1.80, 3.60 and 7.20μgcm-2) and Cd (0.225, 0.45, 0.90 and 1.80μgcm-2) sublethal exposures. Where, the nature of the toxicological interactions between siduron and Cd in inducing or suppressing MT and Hsp70 expression was determined by applying the Combination index (CI)-isobologram model. The results revealed significant variations in MT and weak changes in Hsp70 expression when the earthworms were exposed to individual Cd. The individual siduron exposure exhibited a significant down-regulation (p<0.01) in MT during all treatments and in Hsp70 expression only at 7.20μgcm-2 concentration; while the mixtures of siduron and Cd exposures resulted a significant down regulation (p<0.05) in both MT and Hsp70 expressions. Moreover, the combined siduron and Cd exposure revealed nearly additive effect (CI=1) at the lower effect levels and significant synergistic effect (CI<1) at the higher effect levels for both MT and Hsp70 expression. The synergistic effects of combined siduron and Cd suggest that there might be a potential risk connected to the co-occurrence of these chemicals in the environment.
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Affiliation(s)
- Herman Uwizeyimana
- University of Chinese Academy of Sciences, Beijing 100049, PR China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Meie Wang
- University of Chinese Academy of Sciences, Beijing 100049, PR China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Weiping Chen
- University of Chinese Academy of Sciences, Beijing 100049, PR China; State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
| | - Kifayatullah Khan
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China; Department of Environmental and Conservation Sciences, University of Swat, Swat 19130, Pakistan
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Zhang Z, Yang H, Gao Z, Yuan Y, Dong J, Wang Y, Yue T. Identification, Synthesis, and Safety Assessment of Thidiazuron [1-Phenyl-3-(1,2,3-thidiazol-5-yl)urea] and Its Metabolites in Kiwifruits. J Agric Food Chem 2017; 65:11273-11279. [PMID: 29144740 DOI: 10.1021/acs.jafc.7b03522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The quality of kiwifruit became worse as a result of the abuse of plant growth regulators (PGRs). The safety of the fruits treated with PGRs also worried consumers. Therefore, the present study analyzed the structure of thidiazuron [TDZ, (1-phenyl-3-(1,2,3-thidiazol-5-yl)-urea)] (1) and its metabolites of biotransformation in kiwifruits using liquid chromatography hybrid ion trap time-of-flight mass spectrometry (LC-IT-TOF-MS). Standard compounds were also synthesized and used for structural identification of those metabolites. In addition, cytotoxicity of TDZ and its metabolites was tested through sulforhodamine B assays against normal Chinese hamster ovary (CHO) cells. Four metabolites were identified. They were 4-hydroxy-thidiazuron (2), 3-hydroxy-thidiazuron (3), thidiazuron-4-O-β-d-glucoside (4), and thidiazuron-3-O-β-d-glucoside (5). Values of IC50 of compounds 1, 2, and 3 to CHO cells were 18.3 ± 1.8, 37.56 ± 1.5, and 23.36 ± 1.59 μM, respectively. Compounds 4 and 5 had no effect on CHO cells.
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Affiliation(s)
- Zhiwei Zhang
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
- College of Food Science and Engineering, Qingdao Agricultural University , Qingdao, Shandong 266109, People's Republic of China
| | - Haihua Yang
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
| | - Zhenhong Gao
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
| | - Yahong Yuan
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture ,Yangling, Shaanxi 712100, People's Republic of China
- National Engineering Research Center of Agriculture Integration Test (Yangling) , Yangling, Shaanxi 712100, People's Republic of China
| | - Jing Dong
- Shimadzu International Trading , Beijing 100020, People's Republic of China
| | - Yuan Wang
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University , Yangling, Shaanxi 712100, People's Republic of China
- Laboratory of Quality & Safety Risk Assessment for Agro-products (Yangling), Ministry of Agriculture ,Yangling, Shaanxi 712100, People's Republic of China
- National Engineering Research Center of Agriculture Integration Test (Yangling) , Yangling, Shaanxi 712100, People's Republic of China
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Sun T, Liu H, Ming L. Multiple Roles of Autophagy in the Sorafenib Resistance of Hepatocellular Carcinoma. Cell Physiol Biochem 2017; 44:716-727. [PMID: 29169150 DOI: 10.1159/000485285] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 10/17/2017] [Indexed: 12/25/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the second leading cause of cancer-related death worldwide, and prognosis remains unsatisfactory since the disease is often diagnosed at the advanced stages. Currently, the multikinase inhibitor sorafenib is the only drug approved for the treatment of advanced HCC. However, primary or acquired resistance to sorafenib develops, generating a roadblock in HCC therapy. Autophagy is an intracellular lysosomal pathway involved in protein and organelle degradation, with an astonishing number of connections to human disease and physiology. Current understanding of the role of autophagy in the progression of cancer and the response to cancer therapy remains controversial. Sorafenib is able to induce autophagy in HCC, but the effect of autophagy is indistinct. Some studies established that sorafenib-induced autophagy serves as a pro-survival response. However, other studies found that sorafenib-induced autophagy improves the lethality of sorafenib against HCC cells. The mechanisms underlying autophagy and sorafenib resistance remain elusive. The purpose of this review is to summarize the progress of research focused on autophagy and sorafenib resistance and to update current knowledge of how cellular autophagy impacts sorafenib sensitivity in HCC treatment.
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Xu QY, Meng QW, Shi JF, Deng P, Guo WC, Li GQ. Novaluron ingestion causes larval lethality and inhibits chitin content in Leptinotarsa decemlineata fourth-instar larvae. Pestic Biochem Physiol 2017; 143:173-180. [PMID: 29183589 DOI: 10.1016/j.pestbp.2017.07.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 07/26/2017] [Accepted: 07/28/2017] [Indexed: 05/28/2023]
Abstract
To accomplish consistent, long-term, integrated management (IPM) of the Colorado potato beetle, Leptinotarsa decemlineata (Say), research assessing the potential of novel, IPM-compatible insecticides is essential. Novaluron is a potent benzoylurea insecticide. In the present paper, we found that novaluron ingestion by the fourth-instar larvae inhibited foliage consumption, reduced larval fresh weight, and delayed development period, in a dose dependent manner. Most of the resulting larvae fail to pupate, and died at prepupae stage, with larvicidal activity comparable with those of cyhalothrin and spinosad but lower than those of fipronil and abamectin. Moreover, many surviving pupae that fed novaluron failed to emerge as adults, in a dose dependent pattern. Furthermore, feeding of novaluron significantly decreased chitin contents in body carcass (without midgut) and integument specimen, whereas the chitin concentration in the midgut peritrophic matrix was not affected. Furthermore, uridine diphosphate-N-acetylglucosamine-pyrophosphorylase gene (LdUAP1) and chitin synthase Aa (LdChSAa), which were mainly responsible for chitin biosynthesis in ectodermally-derived tissues, were surpressed and activated respectively after novaluron ingestion. Therefore, novaluron is an effective benzoylurea insecticide to L. decemlineata fourth-instar larvae. It inhibited chitin biosynthesis in ectodermally-derived tissues, disrupted ecdysis, impaired pupation and adult emergence, and led to death in juvenile life stages.
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Affiliation(s)
- Qing-Yu Xu
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Qing-Wei Meng
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Ji-Feng Shi
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
| | - Pan Deng
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
| | - Wen-Chao Guo
- Department of Plant Protection, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China.
| | - Guo-Qing Li
- Education Ministry Key Laboratory of Integrated Management of Crop Diseases and Pests, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
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30
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Fine JD, Mullin CA, Frazier MT, Reynolds RD. Field Residues and Effects of the Insect Growth Regulator Novaluron and Its Major Co-Formulant N-Methyl-2-Pyrrolidone on Honey Bee Reproduction and Development. J Econ Entomol 2017; 110:1993-2001. [PMID: 28961741 DOI: 10.1093/jee/tox220] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Owing to the recent declines in honey bee (Apis mellifera L.) populations, there is a need for field and laboratory studies to investigate threats to pollinator health. This study examines the hypothesis that the organophosphate alternative, Rimon 0.83EC, can have consequences to honey bee health by combining newly acquired field residue data, laboratory bioassays, and colony level feeding studies. Following label rate applications of Rimon 0.83EC to apple trees, average residue concentrations of the active ingredient, novaluron, were found to be 3.38 ppm in tree-collected pollen. Residues of the major co-formulant in Rimon 0.83EC, N-methyl-2-pyrrolidone (NMP), were below the limit of detection in the field, but a growth chamber study described here found that NMP can persist in pollen for up to 7 d with average concentrations of 69.3 ppm. Concurrent larval rearing studies found novaluron and NMP to be toxic to developing honey bees at doses as low as 100 ppb and 100 ppm, respectively. Nucleus colony feeding studies found that chronic exposure to Rimon 0.83EC at doses as low as 200 ppm (18.6 ppm novaluron) can result in interruptions to brood production that can last for up to 2 wk after exposure. Taken together, these data indicate the use of Rimon 0.83EC on blooming flowers is a significant threat to honey bee reproduction, and suggest the need for more strict and clear usage guidelines.
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Affiliation(s)
- Julia D Fine
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802
| | - Christopher A Mullin
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802
| | - Maryann T Frazier
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802
| | - Ryan D Reynolds
- Department of Entomology, Center for Pollinator Research, The Pennsylvania State University, University Park, PA 16802
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Chang J, Li W, Xu P, Guo B, Wang Y, Li J, Wang H. The tissue distribution, metabolism and hepatotoxicity of benzoylurea pesticides in male Eremias argus after a single oral administration. Chemosphere 2017; 183:1-8. [PMID: 28511076 DOI: 10.1016/j.chemosphere.2017.05.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 04/29/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Benzoylurea pesticides (BPUs) are widely used to control the locust, but the toxicokinetics and hepatotoxicity of BPUs in lizards have not been investigated. In this study, the tissue distribution, metabolism and liver toxicity of diflubenzuron and flufenoxuron were assessed in the Eremias argus following a single oral exposure. Diflubenzuron preferred to accumulate in the fat and brain (>1.0 mg kg-1) and was rapidly eliminate in other tissues. In the liver, 4-chloroaniline was one of diflubenzuron metabolites, although with a concentration less than 0.05% of the accumulated diflubenzuron. No significant difference was observed in the liver histopathology between the control and diflubenzuron exposure group. The expressions of Cyp1a and Ahr gene which control the cell apoptosis were also equal to the control level. After flufenoxuron exposure, biomodal phenomenon was observed in the liver, skin, brain, gonad, kidney, heart and blood circulation was an important route for the flufenoxuron penetration. The concentrations of flufenoxuron in all tissues were greater than 1.0 mg kg-1 at 168 h. The excretion of flufenoxuron in the faeces was 1.5 fold higher than diflubenzuron. The hepatocytes in the flufenoxuron treated group showed vacuolation of cytoplasm and decreased nucleus. In addition, the Cyp1a and Ahr genes were significantly up-regulated in the flufenoxuron exposure group. These results suggested that the higher hepatotoxicity of flufenoxuron may be attributed to the higher residual level in the lizard tissues and the Cyp1a and Ahr genes can serve as biomarkers to assess the liver toxicity.
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Affiliation(s)
- Jing Chang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19 a, Beijing 100049, China
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Baoyuan Guo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Jianzhong Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China
| | - Huili Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing 100085, China.
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32
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Freitas CD, Gontijo LM, Guedes RNC, Chediak M. Survival and Locomotory Behavior of Earwigs After Exposure to Reduced-Risk Insecticides. J Econ Entomol 2017; 110:1576-1582. [PMID: 28505282 DOI: 10.1093/jee/tox137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Indexed: 06/07/2023]
Abstract
The conservation of natural enemies is an important tactic to promote biological control of arthropod pests. The earwig Doru luteipes (Sccuder) is the most important predator of the fall armyworm Spodoptera frugiperda (J.E. Smith) in corn fields. One way of conserving these predators in the field is by using only selective insecticides when the pest population reaches the economic threshold. Some recent insecticides such as azadirachtin, chlorantraniliprole, and novaluron have been claimed to pose reduced risk for natural enemies. Nevertheless, there is a dearth of information regarding the selectivity of these insecticides upon earwigs in specific. In this study, we carried out a series of laboratory assays to examine the survivorship and locomotory behavior of D. luteipes after exposure to fresh dry residue of azadirachtin, chlorantraniliprole, and novaluron. Our results show a significant survival reduction for D. luteipes nymphs exposed to fresh residues of chlorantraniliprole and novaluron. In the behavioral studies, adults of D. luteipes stopped more often, spent more time resting (inactive), and moved more slowly immediately after exposure to chlorantraniliprole residue. These results suggest that chlorantraniliprole may mediate an impaired movement and a behavior arrestment of earwigs after contact with this insecticide fresh residue. This could translate into reduced foraging efficiency, and increase exposure and insecticide uptake. Although chlorantraniliprole and novaluron showed a potential to undermine the biological control provided by earwigs, it is yet essential to conduct field trials in order to confirm our laboratory results.
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Affiliation(s)
- Catarina D Freitas
- Programa de Manejo e Conservação de Ecossistemas Naturais e Agrários, Universidade Federal de Viçosa - Campus Florestal, Florestal, MG 35690-000, Brazil
| | - Lessando M Gontijo
- Programa de Manejo e Conservação de Ecossistemas Naturais e Agrários, Universidade Federal de Viçosa - Campus Florestal, Florestal, MG 35690-000, Brazil
- Instituto de Ciências Agrárias, Universidade Federal de Viçosa - Campus Florestal, Florestal, MG 35690-000, Brazil
| | - Raul Narciso C Guedes
- Departmento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brazil
| | - Mateus Chediak
- Departmento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG 36570-000, Brazil
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Ting CT, Cheng YY, Tsai TH. Herb-Drug Interaction between the Traditional Hepatoprotective Formulation and Sorafenib on Hepatotoxicity, Histopathology and Pharmacokinetics in Rats. Molecules 2017; 22:E1034. [PMID: 28640225 PMCID: PMC6152211 DOI: 10.3390/molecules22071034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Accepted: 06/19/2017] [Indexed: 12/12/2022] Open
Abstract
Sorafenib has been used as a standard therapy for advanced hepatocellular carcinoma (HCC). In Asia, patients with HCC are potentially treated with the combination of sorafenib and Chinese herbal medicines to improve the efficiency and reduce the side effects of sorafenib. However, limited information about the herb-drug interactions is available. We hypothesize that the Chinese herbal medicine may exert hepatoprotective effects on the sorafenib-treated group. The aim of this study is to investigate the pharmacokinetic mechanism of drug-drug interactions of sorafenib including interacting with hepatoprotective formulation, Long-Dan-Xie-Gan-Tang formulation (LDXGT) and with two cytochrome P450 3A4 (CYP3A4) inhibitors, grapefruit juice and ketoconazole. Liver enzyme levels and histopathology of liver slices were used to evaluate sorafenib-induced hepatotoxicity and the potential hepatoprotective effects of the LDXGT formulation on subjects treated with the combination of sorafenib and the herbal medicine. In this study, a validated HPLC-photodiode array analytical system was developed for the pharmacokinetic study of sorafenib in rats. As the result of the pharmacokinetic data, pretreatment with the LDXGT formulation did not significantly interact with sorafenib compared with sorafenib oral administration alone. Furthermore, grapefruit juice and ketoconazole did not significantly affect sorafenib metabolism. Furthermore, pretreatment with variable, single or repeat doses of the LDXGT formulation did not suppress or exacerbate the sorafenib-induced hepatotoxicity and histopathological alterations. According to these results, the LDXGT formulation is safe, but has no beneficial effects on sorafenib-induced hepatotoxicity. A detailed clinical trial should be performed to further evaluate the efficacy or adverse effects of the LDXGT formulation in combination with sorafenib in humans.
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Affiliation(s)
- Chin-Tsung Ting
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan.
- Division of Gastrointestinal Surgery, Department of Surgery, Ren-Ai Branch, Taipei City Hospital, Taipei 10629, Taiwan.
| | - Yung-Yi Cheng
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan.
| | - Tung-Hu Tsai
- Institute of Traditional Medicine, School of Medicine, National Yang-Ming University, Taipei 112, Taiwan.
- Graduate Institute of Acupuncture Science, China Medical University, Taichung 40402, Taiwan.
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
- Department of Chemical Engineering, National United University, Miaoli 36063, Taiwan.
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Chang J, Li W, Guo B, Xu P, Wang Y, Li J, Wang H. Unraveling the different toxic effect of flufenoxuron on the thyroid endocrine system of the Mongolia racerunner (Eremias Argus) at different stages. Chemosphere 2017; 172:210-216. [PMID: 28073034 DOI: 10.1016/j.chemosphere.2017.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Revised: 12/29/2016] [Accepted: 01/02/2017] [Indexed: 06/06/2023]
Abstract
Flufenoxuron is a widely used pesticide to inhibit the synthesis of chitin during insect development and its effect on the growth of lizards has been little addressed. The hypothalamus-pituitary-thyroid (HPT) axis plays an important role on the development of lizards. In this study, the lizards at different development stages (proliferation and resting stages) were exposed to flufenoxuron for 21 days. The plasma thyroid hormone levels, thyroid gland histopathology and expression profiles of thyroid hormone receptors (trα, trβ), deiodinases (dio1, dio2), and transthyretin (ttr) genes were measured to evaluated the toxic effect of flufenoxuron on the HPT axis at different stages. The flufenoxuron exposure showed more seriously effect on the triiodothyronine (T3) level at resting phase than that at proliferation stage. The follicle epithelium cell height in the thyroid was only significantly increased when the exposed male lizards were at proliferation stage. The alteration of HPT axis-related genes expression was gender and tissue dependent after flufenoxuron treatment. The lizards exposed to flufenoxuron showed that the trα, trβ, dio1, dio2, and ttr genes in the female liver were more sensitive at the proliferation stage than that at the resting stage. In the male brain, the expressions of trα, trβ, dio1, and dio2 gene were significant decreased at proliferation stage while significant increased at resting stage after flufenoxuron exposure. Therefore, the thyroid endocrine system of lizards could be affected by the flufenoxuron exposure and the different development stage should also be considered when study the toxic effect of contaminants on the lizards.
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Affiliation(s)
- Jing Chang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China; University of Chinese Academy of Sciences, Yuquan RD 19 A, Beijing, 100049, China
| | - Wei Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Baoyuan Guo
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Peng Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Yinghuan Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Jianzhong Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China
| | - Huili Wang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Shuangqing RD 18, Beijing, 100085, China.
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Marlatt VL, Martyniuk CJ. Biological responses to phenylurea herbicides in fish and amphibians: New directions for characterizing mechanisms of toxicity. Comp Biochem Physiol C Toxicol Pharmacol 2017; 194:9-21. [PMID: 28109972 DOI: 10.1016/j.cbpc.2017.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 01/11/2017] [Accepted: 01/13/2017] [Indexed: 12/19/2022]
Abstract
Urea-based herbicides are applied in agriculture to control broadleaf and grassy weeds, acting to either inhibit photosynthesis at photosystem II (phenylureas) or to inhibit acetolactate synthase acetohydroxyacid synthase (sulfonylureas). While there are different chemical formulas for urea-based herbicides, the phenylureas are a widely used class in North America and have been detected in aquatic environments due to agricultural run-off. Here, we summarize the current state of the literature, synthesizing data on phenylureas and their biological effects in two non-target animals, fish and amphibians, with a primary focus on diuron and linuron. In fish, although the acutely lethal effects of diuron in early life stages appear to be >1mg/L, recent studies measuring sub-lethal behavioural and developmental endpoints suggest that diuron causes adverse effects at lower concentrations (i.e. <0.1mg/L). Considerably less toxicity data exist for amphibians, and this is a knowledge gap in the literature. In terms of sub-lethal effects and mode of action (MOA), linuron is well documented to have anti-androgenic effects in vertebrates, including fish. However, there are other MOAs that are not adequately assessed in toxicology studies. In order to identify additional potential MOAs, we conducted in silico analyses for linuron and diuron that were based upon transcriptome studies and chemical structure-function relationships (i.e. ToxCast™, Prediction of Activity Spectra of Substances). Based upon these analyses, we suggest that steroid biosynthesis, cholesterol metabolism and pregnane X receptor activation are common targets, and offer some new endpoints for future investigations of phenylurea herbicides in non-target animals.
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Affiliation(s)
- Vicki L Marlatt
- Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada.
| | - Christopher J Martyniuk
- Department of Physiological Sciences and Center for Environmental and Human Toxicology, UF Genetics Institute, College of Veterinary Medicine, University of Florida, Gainesville, FL 326111, USA; Canadian Rivers Institute, Canada
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Zhang P, Zhao YH, Wang QH, Mu W, Liu F. Lethal and sublethal effects of the chitin synthesis inhibitor chlorfluazuron on Bradysia odoriphaga Yang and Zhang (Diptera: Sciaridae). Pestic Biochem Physiol 2017; 136:80-88. [PMID: 28187835 DOI: 10.1016/j.pestbp.2016.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 07/21/2016] [Accepted: 07/25/2016] [Indexed: 06/06/2023]
Abstract
Bradysia odoriphaga Yang and Zhang is the primary insect pest that affects Chinese chive in northern China. Nevertheless, very few studies have been conducted on the use of chitin synthesis inhibitors (CSIs) for the control of B. odoriphaga. Here, lethal and sublethal effects of the CSI chlorfluazuron on B. odoriphaga were studied to explore the use for integrated pest management (IPM) of B. odoriphaga. A contact and ingestion toxicity bioassay showed that chlorfluazuron was more active against B. odoriphaga than three other CSIs, with a 72h LC50 of 0.1593mg/L. Treatment with the LC50 dose of chlorfluazuron decreased both the intrinsic and finite rates of increase of B. odoriphaga, in addition to reproduction rate, survival rate, and fecundity, and the mean generation time, total preovipositional period and larval development duration were shortened, compared with those of the control and LC10 groups. The mean generation time, total preovipositional period and larval development duration were all also markedly decreased by treatment with chlorfluazuron at the LC10. Furthermore, chlorfluazuron inhibited the feeding of the final instar larvae for a short period. Glutathione S-transferase and microsomal mixed function oxidase activities increased after exposure to the chemical. These results showed that chlorfluazuron at the sublethal LC50 treatment inhibited B. odoriphaga population growth, whereas the danger of causing rapid population growth by using a lower sublethal concentration was demonstrated with the sublethal LC10 treatment. Therefore, chlorfluazuron should be used with caution in an IPM program for B. odoriphaga.
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Affiliation(s)
- Peng Zhang
- College of Plant Protection, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, PR China; College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China
| | - Yun-He Zhao
- College of Plant Protection, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Qiu-Hong Wang
- College of Plant Protection, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Wei Mu
- College of Plant Protection, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, PR China
| | - Feng Liu
- College of Plant Protection, Shandong Provincial Key Laboratory for Biology of Vegetable Diseases and Insect Pests, Shandong Agricultural University, Tai'an, Shandong 271018, PR China.
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Uwizeyimana H, Wang M, Chen W. Evaluation of combined noxious effects of siduron and cadmium on the earthworm Eisenia fetida. Environ Sci Pollut Res Int 2017; 24:5349-5359. [PMID: 28013463 DOI: 10.1007/s11356-016-8220-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/07/2016] [Indexed: 06/06/2023]
Abstract
Environmental contaminants do not often occur as individual chemicals but rather in complex mixtures whose joint effects can create a strong toxicity to surrounding organisms. To determine the combined harmful effects of siduron (herbicide) and cadmium (heavy metal) toward Eisenia fetida earthworms, samples of worm's coelomocytes were subjected to siduron and cadmium (Cd) at sublethal concentrations (lower than LC50)-siduron 0, 0.8, 2.4, and 7.2 μg cm-2 Cd 0, 0.4, 0.8, and 1.6 μg cm-2 in filter paper contact assay, both as individual compounds and combinations. The CI-isobologram model was utilized to reveal the types of toxicological interactions between siduron and cadmium in inducing DNA damage toward earthworms. The results indicated that tail DNA percentage (TDNA %) at individual siduron and cadmium concentrations (with the exception of the lowest concentration of Cd 0.04 μgcm -2) were highly significant compared to those of the control (p < 0.01). Tail moments (TM) at individual Cd concentrations (0.8 and 1.6 μg cm -2) were highly significant compared to those of the control (p < 0.05), while the increase of TM for individual siduron was only significant (p < 0.05) at 7.2 μg cm -2 which is the highest dose/concentration of siduron used in this study. The combinations of siduron and Cd indicated a significant synergism (CI < 1) at the lower effect levels and a significant antagonism (CI > 1) at the higher effect levels. The synergistic effect for a particular combination of chemicals suggests that there might be a possible risk connected to the coincidence of these chemicals.
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Affiliation(s)
- Herman Uwizeyimana
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
| | - Meie Wang
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China
| | - Weiping Chen
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, People's Republic of China.
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Pitts-Singer TL, Barbour JD. Effects of residual novaluron on reproduction in alfalfa leafcutting bees, Megachile rotundata F. (Megachilidae). Pest Manag Sci 2017; 73:153-159. [PMID: 27405042 DOI: 10.1002/ps.4356] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 07/01/2016] [Indexed: 05/28/2023]
Abstract
BACKGROUND The chitin synthesis inhibitor novaluron can suppress pests that affect alfalfa seed production, but can negatively affect reproductive success in the alfalfa pollinator Megachile rotundata. Novaluron is considered to be a reduced-risk insecticide because it disrupts ecdysis and is non-lethal to adult insects, but some exposed adults have fewer eggs and suppressed egg hatch. For this experiment, bees nested in field cages where they were exposed to alfalfa that had never been treated with novaluron, alfalfa that had recently been sprayed or alfalfa that had been sprayed 1 and 2 weeks earlier. RESULTS Compared with the control, greater proportions of dead eggs and larvae and lower proportions of live prepupae occurred when bees were exposed to recent novaluron sprays as well as one- or two-week old spray residues. Two possible routes of residual pesticide exposure were revealed. Mother bees become contaminated through ingestion or direct contact, or pollen-nectar provisions become contaminated with novaluron (1) on or within leaf pieces that surround provisions or (2) transferred from mother bees' bodies to provisions. CONCLUSION We found strong immature mortality effects of novaluron and its residues on M. rotundata. Understanding all possible pesticide exposure routes for pollinating bees enhances decision-making for maintaining bee populations while protecting crops. © 2016 Society of Chemical Industry.
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Affiliation(s)
| | - James D Barbour
- University of Idaho, Parma Research and Extension Center, Parma, ID, USA
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Federico C, Palmieri C, Pappalardo AM, Ferrito V, Pappalardo M, Librando V, Saccone S. Mutagenic properties of linuron and chlorbromuron evaluated by means of cytogenetic biomarkers in mammalian cell lines. Environ Sci Pollut Res Int 2016; 23:17018-17025. [PMID: 27206752 DOI: 10.1007/s11356-016-6867-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Accepted: 05/09/2016] [Indexed: 06/05/2023]
Abstract
Agricultural practices are usually supported by several chemical substances, such as herbicides. Linuron and chlorbromuron are phenylurea herbicides largely used to protect crops from weeds, blocking photosynthesis by inhibition of the photosystem II complex. The former, also commercially known as lorox or afalon, is selectively used to protect bean and French bean plants, fennels, and celeriacs; the second, commercially known as maloran, is selectively used for carrots, peas, potatoes, soy sprouts, and sunflowers. Considering the widespread use of herbicides and, more generally, pesticides, it is important to clarify their involvement on human health, one of them concerning the possible direct or indirect effect on the genome of exposed populations. Here, we show that these herbicides are endowed by mutagenic properties, as demonstrated by an increased number of chromosomal aberrations (CAs) in two exposed Chinese hamster cell lines derived from ovary and epithelial liver, respectively. This was also confirmed by sister chromatid exchange (SCE) and micronucleus (MN) assays. Our present and previously obtained data clearly indicate that phenylurea herbicides must be used with great caution, especially for agricultural workers who use large amounts of herbicides during their work, and particular attention should be given to residues of these herbicides and their involvement in environmental pollution.
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Affiliation(s)
- Concetta Federico
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy
| | - Cristina Palmieri
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy
| | - Anna Maria Pappalardo
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy
| | - Venera Ferrito
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy
| | - Matteo Pappalardo
- Department of Chemical Sciences, University of Catania, Catania, Italy
| | - Vito Librando
- Department of Chemical Sciences, University of Catania, Catania, Italy
| | - Salvatore Saccone
- Department of Biological, Geological and Environmental Sciences, Section of Animal Biology, University of Catania, Catania, Italy.
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40
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Agathokleous E, Mouzaki-Paxinou AC, Saitanis CJ, Paoletti E, Manning WJ. The first toxicological study of the antiozonant and research tool ethylene diurea (EDU) using a Lemna minor L. bioassay: Hints to its mode of action. Environ Pollut 2016; 213:996-1006. [PMID: 26809480 DOI: 10.1016/j.envpol.2015.12.051] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 06/05/2023]
Abstract
The antiozonant and research tool ethylene diurea (EDU) is widely studied as a phytoprotectant against the widespread pollutant ground-surface ozone. Although it has been extensively used, its potential toxicity in the absence of ozone is unknown and its mode of action is unclear. The purpose of this research was to toxicologically assess EDU and to further investigate its mode of action using Lemna minor L. as a model organism. Application of EDU concentrations greater than 593 mg L(-1) (practically 600 mg L(-1)) resulted in adverse inhibition of colony growth. As no-observed-toxic-effects concentration (NOEL) we recommend a concentration of 296 mg L(-1) (practically 300 mg L(-1)). A hormetic response was detected, i.e. stimulatory effects of low EDU concentrations, which may indicate overcompensation in response to disruption in homeostasis. Growth inhibition and suppressed biomass were associated with impacted chlorophyll a fluorescence (ΦPSII, qP and ETR). Furthermore, EDU increased mesophyll thickness, as indicated by frond succulence index. Applications of concentrations ≥593 mg L(-1) to uncontrolled environments should be avoided due to potential toxicity to sensitive organisms and the environment.
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Affiliation(s)
- Eugenios Agathokleous
- Lab of Ecology and Environmental Science, Agricultural University of Athens, Iera Odos 75, Athens, 11855, Greece.
| | - Akrivi-Chara Mouzaki-Paxinou
- Lab of Ecology and Environmental Science, Agricultural University of Athens, Iera Odos 75, Athens, 11855, Greece
| | - Costas J Saitanis
- Lab of Ecology and Environmental Science, Agricultural University of Athens, Iera Odos 75, Athens, 11855, Greece
| | - Elena Paoletti
- Institute of Plant Protection, National Council of Research, Via Madonna del Piano 10, Sesto Fiorentino, Florence, 50019, Italy
| | - William J Manning
- Department of Plant, Soil and Insect Sciences, University of Massachusetts, Amherst, MA, USA
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41
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Zimmerman EI, Gibson AA, Hu S, Vasilyeva A, Orwick SJ, Du G, Mascara GP, Ong SS, Chen T, Vogel P, Inaba H, Maitland ML, Sparreboom A, Baker SD. Multikinase Inhibitors Induce Cutaneous Toxicity through OAT6-Mediated Uptake and MAP3K7-Driven Cell Death. Cancer Res 2015; 76:117-26. [PMID: 26677977 DOI: 10.1158/0008-5472.can-15-0694] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 09/29/2015] [Indexed: 12/22/2022]
Abstract
The use of multikinase inhibitors (MKI) in oncology, such as sorafenib, is associated with a cutaneous adverse event called hand-foot skin reaction (HFSR), in which sites of pressure or friction become inflamed and painful, thus significantly impacting quality of life. The pathogenesis of MKI-induced HFSR is unknown, and the only available treatment options involve dose reduction or discontinuation of therapy, which have negative effects on primary disease management. To investigate the underlying mechanisms by which sorafenib promotes keratinocyte cytotoxicity and subsequent HFSR induction, we performed a transporter-directed RNAi screen in human epidermal keratinocytes and identified SLC22A20 (OAT6) as an uptake carrier of sorafenib. Further investigations into the intracellular mechanism of sorafenib activity through in situ kinome profiling identified the mitogen-activated protein kinase MAP3K7 (TAK1) as a target of sorafenib that induces cell death. Finally, we demonstrate that sorafenib induced keratinocyte injury in vivo and that this effect could be reversed by cotreatment with the OAT6 inhibitor probenecid. Collectively, our findings reveal a novel pathway that regulates the entry of some MKIs into keratinocytes and explains the basis underlying sorafenib-induced skin toxicity, with important implications for the therapeutic management of HFSR.
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Affiliation(s)
- Eric I Zimmerman
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Alice A Gibson
- Division of Pharmaceutics, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Shuiying Hu
- Division of Pharmaceutics, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Aksana Vasilyeva
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Shelley J Orwick
- Division of Pharmaceutics, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Guoqing Du
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Gerard P Mascara
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Su Sien Ong
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Taosheng Chen
- Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Peter Vogel
- Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Hiroto Inaba
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Michael L Maitland
- Section of Hematology/Oncology, Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Alex Sparreboom
- Division of Pharmaceutics, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Sharyn D Baker
- Division of Pharmaceutics, College of Pharmacy & Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio.
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Thapa RK, Choi JY, Poudel BK, Hiep TT, Pathak S, Gupta B, Choi HG, Yong CS, Kim JO. Multilayer-Coated Liquid Crystalline Nanoparticles for Effective Sorafenib Delivery to Hepatocellular Carcinoma. ACS Appl Mater Interfaces 2015; 7:20360-8. [PMID: 26315487 DOI: 10.1021/acsami.5b06203] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Hepatocellular carcinoma is one of the most common cancers in adults and develops due to activation of oncogenes and inactivation of tumor suppressor genes. Sorafenib (SF) is a U.S. Food and Drug Administration (FDA) approved drug for the treatment of hepatocellular carcinoma. However, its clinical use is limited by its poor aqueous solubility and undesirable side effects. Monoolein-based liquid crystalline nanoparticles (LCN) are self-assembled structures that have been determined as promising drug-delivery vehicles. Therefore, the main aim of this study was to prepare layer-by-layer (LbL) polymer-assembled SF-loaded LCNs (LbL-LCN/SF) for effective delivery of SF to hepatocellular carcinoma. Results revealed that LbL-LCN/SF presented optimum particle size (∼165 nm) and polydispersity index (PDI, ∼0.14) with appropriate polymer layer assembly confirmed by transmission electron microscopy (TEM) and atomic force microscopy (AFM). Furthermore, LbL-LCN/SF effectively controlled burst release and exhibited pH-sensitive release of SF, thereby increasing drug release in the acidic microenvironment of tumor cells. Compared to free SF and bare LCN, the hemolytic activity of LbL-LCN/SF was significantly reduced (p<0.01). Interestingly, LbL-LCN/SF was more cytotoxic to HepG2 cells than the free drug was. Additionally, high cellular uptake and greater apoptotic effects of LbL-LCN/SF in HepG2 cells indicates superior antitumor effects. Therefore, LbL-LCN/SF is a potentially effective formulation for hepatocellular carcinoma.
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Affiliation(s)
- Raj Kumar Thapa
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Ju Yeon Choi
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Bijay K Poudel
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Tran Tuan Hiep
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Shiva Pathak
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Biki Gupta
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Han-Gon Choi
- College of Pharmacy, Hanyang University , 55, Hanyangdaehak-ro, Sangnok-gu, Ansan 426-791, South Korea
| | - Chul Soon Yong
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
| | - Jong Oh Kim
- College of Pharmacy, Yeungnam University , 280 Daehak-Ro, Gyeongsan, Gyeongsanbuk-do 712-749, South Korea
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Trostanetsky A, Kostyukovsky M, Quinn E. Transovarial Effect of Novaluron on Tribolium castaneum (Coleoptera: Tenebrionidae) After Termination of Direct Contact. J Insect Sci 2015; 15:125. [PMID: 26363061 PMCID: PMC4672219 DOI: 10.1093/jisesa/iev109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 08/24/2015] [Indexed: 06/05/2023]
Abstract
The insect growth regulator novaluron (Rimon 10 EC, Makhteshim-Agan Ltd, Israel) is used against many field pests on corn, vegetables, orchards, forests, and cotton plantations. Previously, we studied various effects of novaluron on stored grain pests. Termination in Tribolium castaneum (Herbst) eggs hatching after treating adults with novaluron and following restoration after adult transfer to untreated media was observed. The objective of this study was to investigate the restoration of T. castaneum egg hatch following transfer of adults from treated media to untreated favorable and unfavorable media. The time needed for hatching restoration of 50% of eggs laid by adults transferred from novaluron (1 ppm) treated flour to untreated flour (RT50) was 2.7 d. RT50 for those transferred to untreated wheat grain was 4.1 d. RT90 in flour was 3.6 d, in grain--6.1 d. Varieties of RTs in grain and in flour with nonoverlapping confidence intervals indicate that RTs were significantly different. Delay of eggs hatching restoration for adults transferred from treated flour to unfavorable media (Petri dishes with limited amount of flour, lying of eggs not detected) was observed. RT50 in flour was 2.1 d and RT90--3.1 d, while RT50 in the unfavorable media was 3.4 d and RT90 6.5 d. Delayed effect of egg hatching restoration after adult transfer to unfavorable media provides evidence of the significant role of insect physiological state in novaluron excretion and (or) degradation by T. castaneum females.
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Affiliation(s)
- A Trostanetsky
- Department of Food Quality and Safety, ARO, The Volcani Center, Bet Dagan, 50250, Israel
| | - M Kostyukovsky
- Department of Food Quality and Safety, ARO, The Volcani Center, Bet Dagan, 50250, Israel
| | - E Quinn
- Department of Food Quality and Safety, ARO, The Volcani Center, Bet Dagan, 50250, Israel
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Di Cesare Mannelli L, Maresca M, Farina C, Scherz MW, Ghelardini C. A model of neuropathic pain induced by sorafenib in the rat: Effect of dimiracetam. Neurotoxicology 2015; 50:101-7. [PMID: 26254739 DOI: 10.1016/j.neuro.2015.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 07/28/2015] [Accepted: 08/03/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND Sorafenib is a kinase inhibitor anticancer drug whose repeated administration causes the onset of a peripheral painful neuropathy. Notably, the efficacy of common analgesic drugs is not adequate and this often leads pre-mature discontinuation of anticancer therapy. The aim of this study was to establish a rat model of sorafenib-induced neuropathic pain, and to assess the effect of the new anti-neuropathic compound dimiracetam in comparison with gabapentin, pregabalin and duloxetine. METHODS Male Sprague-Dawley rats were treated i.v. (10 mg kg(-1)), i.p. (10 and 30 mg kg(-1)) or p.o. (80 and 160 mg kg(-1)) with sorafenib once daily for 21 days. Pain behaviour measurements (cold plate, paw pressure, electronic von Frey) were performed on days 0, 7, 14 and 21. RESULTS Sorafenib lowered the paw-licking threshold to non-noxious cold stimuli on day 14 of all protocols evaluated. The i.p. administration resulted in greater efficacy than the other administration routes. Sorafenib treatments did not affect paw-withdrawal responses to non-noxious or to noxious mechanical stimuli. On day 14, dimiracetam (300 mg kg(-1)), gabapentin (100 mg kg(-1)), pregabalin (30 mg kg(-1)) and duloxetine (30 mg kg(-1)) were acutely administered p.o. in sorafenib i.p.-treated rats. A single oral dose of dimiracetam induced a statistically significant increase of the pain threshold 15 min after administration. Pregabalin induced a comparable effect, whereas gabapentin and duloxetine were ineffective. Repeated twice-daily administration of dimiracetam (150 mg kg(-1) p.o.), starting on the first day of i.p sorafenib administration, significantly protected rats from sorafenib-induced decrease in the paw-licking threshold. CONCLUSIONS A rat model of sorafenib-induced hypersensitivity to cold stimulation has been established. Dimiracetam and pregabalin are effective in prevention of sorafenib-induced neuropathy in this model.
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Affiliation(s)
- Lorenzo Di Cesare Mannelli
- Department of Neuroscience, Psychology, Drug Research and Child Health, - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139 Firenze, Italy.
| | - Mario Maresca
- Department of Neuroscience, Psychology, Drug Research and Child Health, - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139 Firenze, Italy
| | - Carlo Farina
- Neurotune AG, Wagistrasse 27a, CH-8952 Schlieren, Switzerland; Metys Pharmaceuticals, Friedrichstrasse 6, CH-4055 Basel, Switzerland
| | - Michael W Scherz
- Metys Pharmaceuticals, Friedrichstrasse 6, CH-4055 Basel, Switzerland
| | - Carla Ghelardini
- Department of Neuroscience, Psychology, Drug Research and Child Health, - Neurofarba - Pharmacology and Toxicology Section, University of Florence, Viale G. Pieraccini, 6, 50139 Firenze, Italy
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Pereira TSB, Boscolo CNP, Silva DGHD, Batlouni SR, Schlenk D, Almeida EAD. Anti-androgenic activities of diuron and its metabolites in male Nile tilapia (Oreochromis niloticus). Aquat Toxicol 2015; 164:10-15. [PMID: 25930013 DOI: 10.1016/j.aquatox.2015.04.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/08/2015] [Accepted: 04/10/2015] [Indexed: 06/04/2023]
Abstract
Diuron (3-(3,4-dichlorophenyl)-1,1-dimethylurea) is a widely used herbicide which has been frequently detected in surface waters throughout the world. In vivo bioassay guided fractionation studies indicated that diuron may have estrogenic activity augmented by biotransformation. This study evaluated the effects of diuron and three of its metabolites on plasma hormone concentrations and spermatogenesis of the freshwater fish Nile tilapia (Oreochromis niloticus). Sexually mature male fish were exposed for 25 days to diuron, as well to its metabolites 3,4-dichloroaniline (DCA), 3,4-dichlorophenylurea (DCPU) and 3,4-dichlorophenyl-N-methylurea (DCPMU), at concentrations of 200ng/L. Testosterone levels were decreased by diuron, but had limited effects on gonadal histology. Diuron metabolites, however, caused significant decreases in testosterone and in 11-ketotestosterone, gonadosomatic index, diameter of seminiferous tubules and in the mean percentages of germ cells (spermatids and spermatozoa). We conclude that these metabolites have antiandrogenic activity to male Nile tilapia, potentially causing reproductive impairment in male fish.
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Affiliation(s)
- Thiago Scremin Boscolo Pereira
- Department of Animal Biology, Universidade Estadual Paulista (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP - 15054-000, São José do Rio Preto, SP, Brazil
| | - Camila Nomura Pereira Boscolo
- Department of Animal Biology, Universidade Estadual Paulista (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP - 15054-000, São José do Rio Preto, SP, Brazil
| | - Danilo Grünig Humberto da Silva
- Department of Chemistry and Environmental Sciences, Universidade Estadual Paulista (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP - 15054-000, São José do Rio Preto, SP, Brazil
| | - Sergio Ricardo Batlouni
- Department of Aquaculture, Universidade Estadual Paulista (CAUNESP), Via de Acesso Prof. Paulo Donato Castelane, s/n. CEP - 14884-900, Jaboticabal, SP, Brazil
| | - Daniel Schlenk
- Department of Environmental Sciences, University of California, 3401 Watkins Dr, Riverside, CA 92521, USA
| | - Eduardo Alves de Almeida
- Department of Chemistry and Environmental Sciences, Universidade Estadual Paulista (IBILCE/UNESP), Rua Cristóvão Colombo, 2265, CEP - 15054-000, São José do Rio Preto, SP, Brazil.
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Bányiová K, Čupr P, Kohoutek J. An experimentally refined tool to assess the risks of the human dermal exposure to herbicide chlorotoluron. Environ Sci Pollut Res Int 2015; 22:10713-10720. [PMID: 25752630 DOI: 10.1007/s11356-015-4252-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 02/17/2015] [Indexed: 06/04/2023]
Abstract
Dermal absorption of the herbicide chlorotoluron was measured using ex vivo pig skin in Franz diffusion cells in an automated system. The steady-state flux was calculated, as well as the permeability coefficient, which is 0.0038 cm h(-1). The permeability coefficient (Kp) is a key factor when predicting human health risks resulting from dermal exposition to a substance. The experimental determination of this parameter filled data gaps regarding the dermal absorption of chlorotoluron. The experimental permeability coefficient was subsequently used to calculate the dermal absorbed dose during some exposure scenarios. Reference doses were revised, and screening risk assessment process was done to calculate the risks resulting from exposure to chlorotoluron. This refined new approach proved to be a useful tool for human health risk assessment in the areas with these herbicide applications. Graphical Abstract An experimentally refined tool to assess the risks of the human dermal exposure to herbicide chlorotoluron.
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Affiliation(s)
- Katarína Bányiová
- RECETOX-Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, 625 00, Brno, Czech Republic
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Huang Q, Wu X, Yu X, Zhang L, Lu M, Tao L. Comparison of the cytotoxic impact of chlorfluazuron on selected insect and human cell lines. Environ Toxicol Chem 2015; 34:1675-1682. [PMID: 25753780 DOI: 10.1002/etc.2969] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 07/17/2014] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
To gain new insight into the mechanism of selective cytotoxicity of benzoylureas as insecticides, the in vitro mode of action of chlorfluazuron was investigated on lepidopteran Tn5B1-4 and Sf-21 cells and human Hek293 and HepG2 cells. Chlorfluazuron inhibited the proliferation of Tn5B1-4 and Sf-21 cells with 50% inhibitory concentration values (IC50) of 4.96 µM and 1.12 µM at 48 h and 2.37 µM and 1.76 µM at 96 h, respectively, versus that of Hek293 and HepG2 cells with IC50 values >20 µM. When transferred to chlorfluazuron-free medium, lepidopteran Tn5B1-4 and Sf-21 cells had a postinhibitory recovery development period within 24 h followed by a suppressed increase in cell viability, but human Hek293 and HepG2 cells showed an accelerated increase over their control level. Chlorfluazuron affected Tn5B1-4 and Sf-21 cells, with ≥1.8-fold decreases in the ratio of cellular N-acetylglucosamine (GlcNAc) level and protein content and ≥1.5-fold increases in the mitotic index and G2 /M-phase arrest. Neither Hek293 nor HepG2 cells contained GlcNAc, and chlorfluazuron had no significant effects on the cell cycle and mitotic index of Hek293 and HepG2 cells. In conclusion, the differences between human and lepidopteran cell lines in the characteristic GlcNAc content, G2 /M arrest in the cycle progress, and mitotic index of cells in response to chlorfluazuron may contribute to the selective toxicity of chlorfluazuron to lepidopteran cells.
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Affiliation(s)
- Qingchun Huang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Xiwei Wu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Xiaoqin Yu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Lei Zhang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Miaoqing Lu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
| | - Liming Tao
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, People's Republic of China
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Sie M, den Dunnen WFA, Lourens HJ, Meeuwsen-de Boer TGJ, Scherpen FJG, Zomerman WW, Kampen KR, Hoving EW, de Bont ESJM. Growth-factor-driven rescue to receptor tyrosine kinase (RTK) inhibitors through Akt and Erk phosphorylation in pediatric low grade astrocytoma and ependymoma. PLoS One 2015; 10:e0122555. [PMID: 25799134 PMCID: PMC4370756 DOI: 10.1371/journal.pone.0122555] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Accepted: 02/23/2015] [Indexed: 01/20/2023] Open
Abstract
Up to now, several clinical studies have been started investigating the relevance of receptor tyrosine kinase (RTK) inhibitors upon progression free survival in various pediatric brain tumors. However, single targeted kinase inhibition failed, possibly due to tumor resistance mechanisms. The present study will extend our previous observations that vascular endothelial growth factor receptor (VEGFR)-2, platelet derived growth factor receptor (PDGFR)β, Src, the epidermal growth factor receptor (ErbB) family, and hepatocyte growth factor receptor (HGFR/cMet) are potentially drugable targets in pediatric low grade astrocytoma and ependymoma with investigations concerning growth-factor-driven rescue. This was investigated in pediatric low grade astrocytoma and ependymoma cell lines treated with receptor tyrosine kinase (RTK) inhibitors e.g. sorafenib, dasatinib, canertinib and crizotinib. Flow cytometry analyses showed high percentage of cells expressing VEGFR-1, fibroblast growth factor receptor (FGFR)-1, ErbB1/EGFR, HGFR and recepteur d’origine nantais (RON) (respectively 52-77%, 34-51%, 63-90%, 83-98%, 65-95%). Their respective inhibitors induced decrease of cell viability, measured with WST-1 cell viability assays. At least this was partially due to increased apoptotic levels measured by Annexin V/Propidium Iodide apoptosis assays. EGF, HGF and FGF, which are normally expressed in brain (tumor) tissue, showed to be effective rescue inducing growth factors resulting in increased cell survival especially during treatment with dasatinib (complete rescue) or sorafenib (partial rescue). Growth-factor-driven rescue was less prominent when canertinib or crizotinib were used. Rescue was underscored by significantly activating downstream Akt and/or Erk phosphorylation and increased tumor cell migration. Combination treatment showed to be able to overcome the growth-factor-driven rescue. In conclusion, our study highlights the extensive importance of environmentally present growth factors in developing tumor escape towards RTK inhibitors in pediatric low grade astrocytoma and ependymoma. It is of great interest to anticipate upon these results for the design of new therapeutic trials with RTK inhibitors in these pediatric brain tumors.
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Affiliation(s)
- Mariska Sie
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Wilfred F. A. den Dunnen
- Department of Pathology and Medical Biology, Pathology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Harm Jan Lourens
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Tiny G. J. Meeuwsen-de Boer
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Frank J. G. Scherpen
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Walderik W. Zomerman
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Kim R. Kampen
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Eelco W. Hoving
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Eveline S. J. M. de Bont
- Department of Pediatrics, Beatrix Children’s Hospital, Pediatric Oncology/Hematology division, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
- * E-mail:
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Copin PJ, Coutu S, Chèvre N. Modelling the effect of fluctuating herbicide concentrations on algae growth. Ecotoxicol Environ Saf 2015; 113:214-222. [PMID: 25499055 DOI: 10.1016/j.ecoenv.2014.12.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 12/01/2014] [Accepted: 12/03/2014] [Indexed: 06/04/2023]
Abstract
Herbicide concentrations fluctuate widely in watercourses after crop applications and rain events. The level of concentrations in pulses can exceed the water chronic quality criteria. In the present study, we proposed modelling the effects of successive pulse exposure on algae. The deterministic model proposed is based on two parameters: (i) the typical growth rate of the algae, obtained by monitoring growth rates of several successive batch cultures in growth media, characterizing both the growth of the control and during the recovery periods; (ii) the growth rate of the algae exposed to pulses, determined from a dose-response curve obtained with a standard toxicity test. We focused on the herbicide isoproturon and on the freshwater alga Scenedesmus vacuolatus, and we validated the model prediction based on effect measured during five sequential pulse exposures in laboratory. The comparison between the laboratory and the modelled effects illustrated that the results yielded were consistent, making the model suitable for effect prediction of the herbicide photosystem II inhibitor isoproturon on the alga S. vacuolatus. More generally, modelling showed that both pulse duration and level of concentration play a crucial role. The application of the model to a real case demonstrated that both the highest peaks and the low peaks with a long duration affect principally the cell density inhibition of the alga S. vacuolatus. It is therefore essential to detect these characteristic pulses when monitoring of herbicide concentrations are conducted in rivers.
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Affiliation(s)
- Pierre-Jean Copin
- Institut des dynamiques de la surface terrestre (IDYST), Faculté des Géosciences et de l'Environment, Université de Lausanne, Géopolis, Quartier Mouline, CH-1015 Lausanne, Switzerland.
| | - Sylvain Coutu
- Laboratoire de technologie écologique, Institut d'ingénierie de l'environnement, Faculté de l'environnement naturel, architectural et construit (ENAC), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Nathalie Chèvre
- Institut des dynamiques de la surface terrestre (IDYST), Faculté des Géosciences et de l'Environment, Université de Lausanne, Géopolis, Quartier Mouline, CH-1015 Lausanne, Switzerland.
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50
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Li D, Wu X, Yu X, Huang Q, Tao L. Synergistic effect of non-ionic surfactants Tween 80 and PEG6000 on cytotoxicity of insecticides. Environ Toxicol Pharmacol 2015; 39:677-682. [PMID: 25699500 DOI: 10.1016/j.etap.2014.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 12/24/2014] [Accepted: 12/24/2014] [Indexed: 06/04/2023]
Abstract
The use of surfactants in the development of a suitable formulation for insecticides should improve the solubility behavior, the permeability and the efficiency against pests meanwhile decrease the toxic risks of insecticides on human health. Cytotoxicity of insecticides including abamectin, chlorfluazuron, hexaflumuron, chlorpyrifos, and tebufenozide was assessed on human HepG2 and lepidopteran Tn5B1-4 cells utilizing insecticide alone and in combination with nontoxic concentrations of nonionic surfactants Tween 80 and PEG6000. The results showed avermection revealed high cytotoxicity, chlorfluazuron and hexaflumuron possessed median cytotoxicity, and chlorpyrifos and tebufenozide had little cytotoxicity on HepG2 and Tn5B1-4 cells. The co-incubation with Tween 80 and PEG6000 powerfully counteracted the cytotoxicity of avermectin. Tween 80 enhanced, whereas PEG6000 compressed, the cytotoxicity of chlorfluazuron on Tn5B1-4 cells, and also improved a bit of the cytotoxicity of chlorpyrifos or tebufenozide on HepG2 cells. PEG6000 was more suitable to be used as surfactant in improving insecticide solubility and reducing the cytotoxicity. The present investigation demonstrates the necessity of utilizing surfactants to weaken the cytotoxicity of insecticides.
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Affiliation(s)
- Diqiu Li
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xiwei Wu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoqin Yu
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Qingchun Huang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
| | - Liming Tao
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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