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Azevedo P, Butolo NP, de Alencar LD, Lima HMS, Sales VR, Malaspina O, Nocelli RCF. Optimization of in vitro culture of honeybee nervous tissue for pesticide risk assessment. Toxicol In Vitro 2022; 84:105437. [PMID: 35839977 DOI: 10.1016/j.tiv.2022.105437] [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: 05/28/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 11/19/2022]
Abstract
The most used pesticides have neurotoxic action on the neurotransmitter system of target and non-targeted insects, such as honeybees. However, honeybees have foremost importance worldwide, which has encouraged the development of tools to evaluate the action of specific pesticide molecules on their nervous system, providing accurate data on damage to their brain. In this sense, our study aimed to optimize in vitro honeybee nervous tissue culture to assess pesticide risks. To this end, six forager honeybee brains were dissected and transferred to different combinations of Leibovitz-15 (L-15) culture medium supplemented with Fetal Bovine Serum (FBS), Hank's Balanced Salt Solution (HBSS), and Insect Medium Supplement (IMS). Nervous tissues were collected after different incubation times (1, 6, 12, and 24 h) for morphology and Kenyon cell analyses. Our results showed that L-15 medium supplemented with HBSS and with HBSS plus FBS were the best media for culturing honey nervous tissue, as they resulted in less tissue spacing and cell disarrangement. Therefore, they may be assessed in future ecotoxicological tests.
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Affiliation(s)
- Patricia Azevedo
- Universidade Estadual Paulista 'Júlio de Mesquita Filho'(UNESP), Departamento de Biologia, Centro de Estudos de Insetos Sociais (CEIS), Programa de Pós-Graduação em Biologia Celular e Molecular, campus Rio Claro, SP, Brazil.
| | - Nicole Pavan Butolo
- Universidade Estadual Paulista 'Júlio de Mesquita Filho'(UNESP), Departamento de Biologia, Centro de Estudos de Insetos Sociais (CEIS), Programa de Pós-Graduação em Biologia Celular e Molecular, campus Rio Claro, SP, Brazil
| | - Luciano Delmondes de Alencar
- Universidade Estadual de Campinas (UNICAMP), Instituto de Biologia, Grupo de Genética e Genômica da Conservação, Programa de Pós-Graduação em Genética e Biologia Molecular, Campinas, SP, Brazil
| | - Hellen Maria Soares Lima
- Universidade Estadual Paulista 'Júlio de Mesquita Filho'(UNESP), Departamento de Biologia, Centro de Estudos de Insetos Sociais (CEIS), Programa de Pós-Graduação em Biologia Celular e Molecular, campus Rio Claro, SP, Brazil
| | - Victor Ribeiro Sales
- Universidade Federal de São Carlos, Centro de Ciências Agrárias, Departamento de Ciências da Natureza, Matemática e Educação, Grupo de Abelhas e Serviços Ambientais, Programa de Pós-Graduação em Agricultura e Ambiente, campus Araras, SP, Brazil
| | - Osmar Malaspina
- Universidade Estadual Paulista 'Júlio de Mesquita Filho'(UNESP), Departamento de Biologia, Centro de Estudos de Insetos Sociais (CEIS), Programa de Pós-Graduação em Biologia Celular e Molecular, campus Rio Claro, SP, Brazil
| | - Roberta Cornélio Ferreira Nocelli
- Universidade Federal de São Carlos, Centro de Ciências Agrárias, Departamento de Ciências da Natureza, Matemática e Educação, Grupo de Abelhas e Serviços Ambientais, Programa de Pós-Graduação em Agricultura e Ambiente, campus Araras, SP, Brazil
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Conceição de Assis J, Eduardo da Costa Domingues C, Tadei R, Inês da Silva C, Soares Lima HM, Decio P, Silva-Zacarin ECM. Sublethal doses of imidacloprid and pyraclostrobin impair fat body of solitary bee Tetrapedia diversipes (Klug, 1810). Environ Pollut 2022; 304:119140. [PMID: 35301028 DOI: 10.1016/j.envpol.2022.119140] [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: 12/14/2021] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 06/14/2023]
Abstract
Solitary bees present greater species diversity than social bees. However, they are less studied than managed bees, mainly regarding the harmful effects of pesticides present in agroecosystems commonly visited by them. This study aimed to evaluate the effect of residual doses of imidacloprid and pyraclostrobin, alone and in combination, on the fat body (a multifunctional organ) of the neotropical solitary bee Tetrapedia diversipes by means of morphological and histochemical evaluation of oenocytes and trophocytes. Males and females of newly-emerged adults were submitted to bioassays of acute topical exposure. Experimental groups were essayed: control (CTR), solvent control (ACT), imidacloprid (IMI, 0.0028 ng/μL), pyraclostrobin (PYR, 2.7 ng/μL) and imidacloprid + pyraclostrobin (I + P). The data demonstrated that the residual doses applied in T. diversipes adults are sublethal at 96 h. Both oenocytes and trophocytes cells responded to topical exposure to the pesticides, showing morphological changes. In the IMI group, the bee oenocytes showed the greatest proportion of vacuolization and altered nuclei. The pyraclostrobin exposure increased the intensity of PAS-positive labeling (glycogen) in trophocytes. This increase was also observed in the I + P group. Changes in energy reserve (glycogen) of trophocytes indicate a possible mobilization impairment of this neutral polysaccharide to the hemolymph, which can compromise the fitness of exposed individuals. Also, changes in oenocytes can compromise the detoxification function performed by the fat body. This is the first study to show sublethal effects in neotropical solitary bees and highlight the importance of studies with native bees.
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Affiliation(s)
- Josimere Conceição de Assis
- Federal University of São Carlos, UFSCar, Postgraduate Program in Biotechnology and Environmental Monitoring, Sorocaba, São Paulo State, Brazil
| | | | - Rafaela Tadei
- São Paulo State University, UNESP, Postgraduate Program in Biological Sciences, Rio Claro, São Paulo State, Brazil
| | - Cláudia Inês da Silva
- Federal University of São Carlos, UFSCar, Department of Biology, Laboratory of Ecotoxicology and Environmental Integrity (LEIA), Sorocaba, São Paulo State, Brazil; Federal University of São Carlos, UFSCar, Department of Environmental Sciences, Sorocaba, São Paulo State, Brazil
| | - Hellen Maria Soares Lima
- Federal University of São Carlos, UFSCar, Department of Biology, Laboratory of Ecotoxicology and Environmental Integrity (LEIA), Sorocaba, São Paulo State, Brazil
| | - Pâmela Decio
- Federal University of São Carlos, UFSCar, Postgraduate Program in Biotechnology and Environmental Monitoring, Sorocaba, São Paulo State, Brazil; Federal University of São Carlos, UFSCar, Department of Biology, Laboratory of Ecotoxicology and Environmental Integrity (LEIA), Sorocaba, São Paulo State, Brazil
| | - Elaine C M Silva-Zacarin
- Federal University of São Carlos, UFSCar, Postgraduate Program in Biotechnology and Environmental Monitoring, Sorocaba, São Paulo State, Brazil; Federal University of São Carlos, UFSCar, Department of Biology, Laboratory of Ecotoxicology and Environmental Integrity (LEIA), Sorocaba, São Paulo State, Brazil.
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Guedes TDA, Moreira-de-Sousa C, Lima HMS, Grella TC, Socolowski PC, Fontanetti CS. Cytoprotective and anti-apoptotic action of HSP70 stress protein in Oreochromis niloticus exposed to residual dilutions of insecticides with fipronil and ethiprole. J Environ Sci Health B 2020; 55:687-693. [PMID: 32432968 DOI: 10.1080/03601234.2020.1766898] [Citation(s) in RCA: 3] [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] [Indexed: 06/11/2023]
Abstract
The objective of this research was to investigate the potential damage caused by the residual concentrations of the insecticides Regent® WS 800 and Curbix® SC 200, containing fipronil and ethiprole, respectively as active ingredients, on the liver of Oreochromis niloticus. The analyses of HSP70 shock protein labelling and cell death process by TUNEL method were performed in order to measure the effects of the exposure of cell repair system of fish to both insecticides. Statistical analyses showed no significant molecular damage to the hepatic tissue of animals. Nevertheless, variations in HSP70 and DNA fragmentation levels, endpoint of cell repair system response and cellular death, respectively, were observed in several groups. These results indicate that the cell repair machinery was efficient when in contact with residual concentrations of insecticides. However, the DNA fragmentation detected by the TUNEL method suggests that even in face of the cytoprotective action of the HSP70 protein, there are damages that become irreparable. To finish, it is worth mentioning that given the results obtained from residual concentrations, use in the field should be with caution.
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Affiliation(s)
- Thays de Andrade Guedes
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
| | - Cristina Moreira-de-Sousa
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
| | - Hellen Maria Soares Lima
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
| | - Tatiane Caroline Grella
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
| | - Priscila Cintra Socolowski
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
| | - Carmem Silvia Fontanetti
- Department of Biology, UNESP (São Paulo State University), IB (Instituto de Biociências), Rio Claro, São Paulo, Brazil
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