Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10362/87626 |
Resumo: | The increasing use of nanoparticles in recent decades led to a growing concern about the possible consequences for the environment. The present study aims to evaluate the toxicity of the Quantum Dots (QDs) (ZnS and CdS), using Danio rerio, Daphnia magna and HepG2 cell line. Both organisms were exposed to different concentrations of QDs (10, 100 and 1000 µg/L), singly and combined, to assess toxicity. Several biochemical analyses were performed: antioxidant enzymes (Catalase, Glutathione-Stransferase and Superoxide Dismutase), total antioxidant capacity (TAC), ubiquitin, heat shock proteins (HSPs) and lipid peroxidation (MDA content). An HepG2 cell line was also exposed to the same QDs concentrations, and cell viability was assessed. QDs were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Dynamic light scattering (DLS). The results from exposure assays showed that the concentrations of QDs tested did not cause mortality in fish but resulted in high mortality rates in Daphnia magna exposed to higher QDs concentrations (100 and 1000 µg/L). Regarding HepG2 assay, QDs were not able to cause significant cytotoxicity. Overall, the results from fish and Daphnids assays showed sub-lethal effects following exposure to the different concentrations of QDs. D. rerio exposure assays showed increased levels of antioxidant enzymes, HSP70 and Ubiquitin in fish exposed to 100 µg/L QDs (ZnS). D. magna exposure assays revealed decreased levels of antioxidant enzymes and increased levels of Ubiquitin according to QDs concentrations tested. Was investigated the trophic transfer of QDs from D. magna (previously exposed to QDs) to D. rerio. The results from Inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis indicate that the QDs (and/or their ions released into the aqueous medium) were ingested by Daphnia and then transferred to fish via ingestion as well. |
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Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell lineQuantum DotsDanio rerioDaphnia magnaHepG2Oxidative stressToxicityDomínio/Área Científica::Engenharia e Tecnologia::Engenharia QuímicaThe increasing use of nanoparticles in recent decades led to a growing concern about the possible consequences for the environment. The present study aims to evaluate the toxicity of the Quantum Dots (QDs) (ZnS and CdS), using Danio rerio, Daphnia magna and HepG2 cell line. Both organisms were exposed to different concentrations of QDs (10, 100 and 1000 µg/L), singly and combined, to assess toxicity. Several biochemical analyses were performed: antioxidant enzymes (Catalase, Glutathione-Stransferase and Superoxide Dismutase), total antioxidant capacity (TAC), ubiquitin, heat shock proteins (HSPs) and lipid peroxidation (MDA content). An HepG2 cell line was also exposed to the same QDs concentrations, and cell viability was assessed. QDs were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Dynamic light scattering (DLS). The results from exposure assays showed that the concentrations of QDs tested did not cause mortality in fish but resulted in high mortality rates in Daphnia magna exposed to higher QDs concentrations (100 and 1000 µg/L). Regarding HepG2 assay, QDs were not able to cause significant cytotoxicity. Overall, the results from fish and Daphnids assays showed sub-lethal effects following exposure to the different concentrations of QDs. D. rerio exposure assays showed increased levels of antioxidant enzymes, HSP70 and Ubiquitin in fish exposed to 100 µg/L QDs (ZnS). D. magna exposure assays revealed decreased levels of antioxidant enzymes and increased levels of Ubiquitin according to QDs concentrations tested. Was investigated the trophic transfer of QDs from D. magna (previously exposed to QDs) to D. rerio. The results from Inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis indicate that the QDs (and/or their ions released into the aqueous medium) were ingested by Daphnia and then transferred to fish via ingestion as well.Diniz, MárioMartins, MartaRUNMatos, Beatriz Isabel Manso de2019-11-18T10:07:31Z2019-1020192019-10-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/87626enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T04:39:00Zoai:run.unl.pt:10362/87626Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:36:45.343768Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
title |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
spellingShingle |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line Matos, Beatriz Isabel Manso de Quantum Dots Danio rerio Daphnia magna HepG2 Oxidative stress Toxicity Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química |
title_short |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
title_full |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
title_fullStr |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
title_full_unstemmed |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
title_sort |
Study of Quantum Dots (CdS, ZnS) toxicity in Danio rerio, Daphnia magna and HepG2 cell line |
author |
Matos, Beatriz Isabel Manso de |
author_facet |
Matos, Beatriz Isabel Manso de |
author_role |
author |
dc.contributor.none.fl_str_mv |
Diniz, Mário Martins, Marta RUN |
dc.contributor.author.fl_str_mv |
Matos, Beatriz Isabel Manso de |
dc.subject.por.fl_str_mv |
Quantum Dots Danio rerio Daphnia magna HepG2 Oxidative stress Toxicity Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química |
topic |
Quantum Dots Danio rerio Daphnia magna HepG2 Oxidative stress Toxicity Domínio/Área Científica::Engenharia e Tecnologia::Engenharia Química |
description |
The increasing use of nanoparticles in recent decades led to a growing concern about the possible consequences for the environment. The present study aims to evaluate the toxicity of the Quantum Dots (QDs) (ZnS and CdS), using Danio rerio, Daphnia magna and HepG2 cell line. Both organisms were exposed to different concentrations of QDs (10, 100 and 1000 µg/L), singly and combined, to assess toxicity. Several biochemical analyses were performed: antioxidant enzymes (Catalase, Glutathione-Stransferase and Superoxide Dismutase), total antioxidant capacity (TAC), ubiquitin, heat shock proteins (HSPs) and lipid peroxidation (MDA content). An HepG2 cell line was also exposed to the same QDs concentrations, and cell viability was assessed. QDs were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Dynamic light scattering (DLS). The results from exposure assays showed that the concentrations of QDs tested did not cause mortality in fish but resulted in high mortality rates in Daphnia magna exposed to higher QDs concentrations (100 and 1000 µg/L). Regarding HepG2 assay, QDs were not able to cause significant cytotoxicity. Overall, the results from fish and Daphnids assays showed sub-lethal effects following exposure to the different concentrations of QDs. D. rerio exposure assays showed increased levels of antioxidant enzymes, HSP70 and Ubiquitin in fish exposed to 100 µg/L QDs (ZnS). D. magna exposure assays revealed decreased levels of antioxidant enzymes and increased levels of Ubiquitin according to QDs concentrations tested. Was investigated the trophic transfer of QDs from D. magna (previously exposed to QDs) to D. rerio. The results from Inductively coupled plasma atomic emission spectroscopy (ICP-AES) analysis indicate that the QDs (and/or their ions released into the aqueous medium) were ingested by Daphnia and then transferred to fish via ingestion as well. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-11-18T10:07:31Z 2019-10 2019 2019-10-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10362/87626 |
url |
http://hdl.handle.net/10362/87626 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799137985178894336 |