Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFSCAR |
Texto Completo: | https://repositorio.ufscar.br/handle/ufscar/7378 |
Resumo: | This work describes the synthesis and characterization of complexes cis-[Ru (phen)2(L)2]2+, where phen = 1,10-phenanthroline; L = 3,4-diaminopyridine and 4-aminopyridine, as well results for in vitro AD diagnosis and treatment. The complexes are soluble and stable in aqueous solution, display absorption (max = 480 nm; = 9500 mol-1 L cm-1) and emission (em = 650 nm; = 129 ns, 1.3 ns) in the region visible, and Stokes shift about 5000 cm-1. The luminescence of the complexes was incorporated into the cytoplasm of Neuro 2a cells, and showed no apparent damage of cell membrane integrity, morphology, and cytoxicity (IC50 >> 50 M). The inhibitory activity of complexes was evaluated for human recombinant acetylcholinesterase (hAChE) and butyrylcholinesterase from human serum (hBuChE) using the spectrophotometric method proposed by Ellman. The complexes are 4-fold more potent to hAChE than hBuChE, and the Lineweaver-Burk analysis indicated a reversible and mixed-type inhibition for both complexes. The antioxidant capacity of complexes was evaluated from the analysis of hydroxyl radical scavenging, and using the stable radicals 2,2- diphenil-1-picrylhydrazyl (DPPH•) and the 2,2-azinobis-3ethylbenzothiazoline- 6-sulphonate (ABTS•+). The complex cis-[Ru(phen)2(3,4-Apy)2]2+ showed a great antioxidant ability against the tested radicals. We used the luminescence of complexes to monitor in real time the self-aggregation of A with the FLIM technique. Under the same experimental conditions, the complexes bind to A1- 40 and to central hydrophobic core A15-21, but not to A22-35, that lacks the apolar Val18 and Phe20 residues, this indicates that the complexes can recognize and align specific sites of the A peptide. |
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Silva, Débora Eduarda SoaresCarlos, Rose Mariahttp://lattes.cnpq.br/1589143355309943http://lattes.cnpq.br/2873134325293310c677b1d5-ebc5-4bdf-b003-62ea4b561ef72016-09-23T14:19:14Z2016-09-23T14:19:14Z2016-02-29SILVA, Débora Eduarda Soares. Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7378.https://repositorio.ufscar.br/handle/ufscar/7378This work describes the synthesis and characterization of complexes cis-[Ru (phen)2(L)2]2+, where phen = 1,10-phenanthroline; L = 3,4-diaminopyridine and 4-aminopyridine, as well results for in vitro AD diagnosis and treatment. The complexes are soluble and stable in aqueous solution, display absorption (max = 480 nm; = 9500 mol-1 L cm-1) and emission (em = 650 nm; = 129 ns, 1.3 ns) in the region visible, and Stokes shift about 5000 cm-1. The luminescence of the complexes was incorporated into the cytoplasm of Neuro 2a cells, and showed no apparent damage of cell membrane integrity, morphology, and cytoxicity (IC50 >> 50 M). The inhibitory activity of complexes was evaluated for human recombinant acetylcholinesterase (hAChE) and butyrylcholinesterase from human serum (hBuChE) using the spectrophotometric method proposed by Ellman. The complexes are 4-fold more potent to hAChE than hBuChE, and the Lineweaver-Burk analysis indicated a reversible and mixed-type inhibition for both complexes. The antioxidant capacity of complexes was evaluated from the analysis of hydroxyl radical scavenging, and using the stable radicals 2,2- diphenil-1-picrylhydrazyl (DPPH•) and the 2,2-azinobis-3ethylbenzothiazoline- 6-sulphonate (ABTS•+). The complex cis-[Ru(phen)2(3,4-Apy)2]2+ showed a great antioxidant ability against the tested radicals. We used the luminescence of complexes to monitor in real time the self-aggregation of A with the FLIM technique. Under the same experimental conditions, the complexes bind to A1- 40 and to central hydrophobic core A15-21, but not to A22-35, that lacks the apolar Val18 and Phe20 residues, this indicates that the complexes can recognize and align specific sites of the A peptide.Este trabalho descreve a síntese e caracterização dos complexos cis- [Ru(phen)2(L)2]2+, em que phen = 1,10-fenantrolina; L= 3,4-diaminopiridina e 4- aminopiridina, assim como resultados in vitro para o diagnóstico e tratamento da DA. Os complexos são estáveis e solúveis em solução aquosa, absorvem (máx = 480 nm, = 9500 mol-1 L cm-1) e emitem ( em = 650 nm, = 129 ns; 1,3 ns) na região do visível, e apresentam deslocamento de Stokes na ordem de 5000 cm-1. A luminescência dos complexos foi incorporada no citoplasma de células Neuro 2a, e não apresentaram danos aparentes a integridade da membrana celular, a morfologia e citotoxicidade (IC50 >> 50 M). A atividade inibitória dos complexos foi avaliada para as enzimas acetilcolinesterase recombinante humana (hAChE) e butirilcolinesterase de soro humano (BuChE) empregando o método espectrofotométrico proposto por Ellman. Os complexos são quatro vezes mais potentes na inibição da enzima AChE do que da BuChE, e a análise de Lineweaver-Burk indicou uma inibição reversível e do tipo mista para os dois complexos. A capacidade antioxidante dos complexos foi investigada a partir da análise do sequestro do radical hidroxila, e também empregando os modelos de radicais estáveis DPPH• (2,2-difenil-1picril-hidrazila) e ABTS•+ (2,2'-azinobis- [3-ethylbenzthiazoline-6-sulfonic acid]). O complexo cis-[Ru(phen)2(3,4- Apy)2]2+ apresentou boa habilidade antioxidante frente aos radicais testados. A luminescência dos complexos foi utilizada para monitorar em tempo real a agregação do A1-40 com o uso da técnica FLIM. Sob as mesmas condições experimentais, os complexos se ligam ao A1-40 e ao centro hidrofóbico A15-21, mas não ao A22-35, no qual os resíduos apolares Val18 e Phe20 estão ausentes, o que indica que os complexos podem reconhecer e alinhar locais específicos do peptídeo A.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Processo n° 2014/07935-8porUniversidade Federal de São CarlosCâmpus São CarlosPrograma de Pós-Graduação em Química - PPGQUFSCarQuímica inorgânicaComplexos de rutênioAminopiridinasDoença de AlzheimerBetaamilóideCIENCIAS EXATAS E DA TERRA::QUIMICAComplexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de AlzheimerMultifunctional transition metal complexes to treatment and diagnosis of Alzheimer´s diseaseinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisOnline60060081ea1b7e-7dcf-438f-a839-b8cab12c5740info:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFSCARinstname:Universidade Federal de São Carlos (UFSCAR)instacron:UFSCARORIGINALDissDESS.pdfDissDESS.pdfapplication/pdf3515899https://repositorio.ufscar.br/bitstream/ufscar/7378/1/DissDESS.pdf79693b6b1e1d324fada28f6444eec538MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81957https://repositorio.ufscar.br/bitstream/ufscar/7378/2/license.txtae0398b6f8b235e40ad82cba6c50031dMD52TEXTDissDESS.pdf.txtDissDESS.pdf.txtExtracted texttext/plain147538https://repositorio.ufscar.br/bitstream/ufscar/7378/3/DissDESS.pdf.txtd9a87ad99526665cb93c42952bffff99MD53THUMBNAILDissDESS.pdf.jpgDissDESS.pdf.jpgIM Thumbnailimage/jpeg10256https://repositorio.ufscar.br/bitstream/ufscar/7378/4/DissDESS.pdf.jpged0baa07b21e897ee5faa7cbcf56350eMD54ufscar/73782023-09-18 18:30:51.146oai:repositorio.ufscar.br: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Repositório InstitucionalPUBhttps://repositorio.ufscar.br/oai/requestopendoar:43222023-09-18T18:30:51Repositório Institucional da UFSCAR - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.por.fl_str_mv |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
dc.title.alternative.eng.fl_str_mv |
Multifunctional transition metal complexes to treatment and diagnosis of Alzheimer´s disease |
title |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
spellingShingle |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer Silva, Débora Eduarda Soares Química inorgânica Complexos de rutênio Aminopiridinas Doença de Alzheimer Betaamilóide CIENCIAS EXATAS E DA TERRA::QUIMICA |
title_short |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
title_full |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
title_fullStr |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
title_full_unstemmed |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
title_sort |
Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer |
author |
Silva, Débora Eduarda Soares |
author_facet |
Silva, Débora Eduarda Soares |
author_role |
author |
dc.contributor.authorlattes.por.fl_str_mv |
http://lattes.cnpq.br/2873134325293310 |
dc.contributor.author.fl_str_mv |
Silva, Débora Eduarda Soares |
dc.contributor.advisor1.fl_str_mv |
Carlos, Rose Maria |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/1589143355309943 |
dc.contributor.authorID.fl_str_mv |
c677b1d5-ebc5-4bdf-b003-62ea4b561ef7 |
contributor_str_mv |
Carlos, Rose Maria |
dc.subject.por.fl_str_mv |
Química inorgânica Complexos de rutênio Aminopiridinas Doença de Alzheimer Betaamilóide |
topic |
Química inorgânica Complexos de rutênio Aminopiridinas Doença de Alzheimer Betaamilóide CIENCIAS EXATAS E DA TERRA::QUIMICA |
dc.subject.cnpq.fl_str_mv |
CIENCIAS EXATAS E DA TERRA::QUIMICA |
description |
This work describes the synthesis and characterization of complexes cis-[Ru (phen)2(L)2]2+, where phen = 1,10-phenanthroline; L = 3,4-diaminopyridine and 4-aminopyridine, as well results for in vitro AD diagnosis and treatment. The complexes are soluble and stable in aqueous solution, display absorption (max = 480 nm; = 9500 mol-1 L cm-1) and emission (em = 650 nm; = 129 ns, 1.3 ns) in the region visible, and Stokes shift about 5000 cm-1. The luminescence of the complexes was incorporated into the cytoplasm of Neuro 2a cells, and showed no apparent damage of cell membrane integrity, morphology, and cytoxicity (IC50 >> 50 M). The inhibitory activity of complexes was evaluated for human recombinant acetylcholinesterase (hAChE) and butyrylcholinesterase from human serum (hBuChE) using the spectrophotometric method proposed by Ellman. The complexes are 4-fold more potent to hAChE than hBuChE, and the Lineweaver-Burk analysis indicated a reversible and mixed-type inhibition for both complexes. The antioxidant capacity of complexes was evaluated from the analysis of hydroxyl radical scavenging, and using the stable radicals 2,2- diphenil-1-picrylhydrazyl (DPPH•) and the 2,2-azinobis-3ethylbenzothiazoline- 6-sulphonate (ABTS•+). The complex cis-[Ru(phen)2(3,4-Apy)2]2+ showed a great antioxidant ability against the tested radicals. We used the luminescence of complexes to monitor in real time the self-aggregation of A with the FLIM technique. Under the same experimental conditions, the complexes bind to A1- 40 and to central hydrophobic core A15-21, but not to A22-35, that lacks the apolar Val18 and Phe20 residues, this indicates that the complexes can recognize and align specific sites of the A peptide. |
publishDate |
2016 |
dc.date.accessioned.fl_str_mv |
2016-09-23T14:19:14Z |
dc.date.available.fl_str_mv |
2016-09-23T14:19:14Z |
dc.date.issued.fl_str_mv |
2016-02-29 |
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.citation.fl_str_mv |
SILVA, Débora Eduarda Soares. Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7378. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufscar.br/handle/ufscar/7378 |
identifier_str_mv |
SILVA, Débora Eduarda Soares. Complexos de metais de transição multifuncionais para o tratamento e diagnóstico da doença de Alzheimer. 2016. Dissertação (Mestrado em Química) – Universidade Federal de São Carlos, São Carlos, 2016. Disponível em: https://repositorio.ufscar.br/handle/ufscar/7378. |
url |
https://repositorio.ufscar.br/handle/ufscar/7378 |
dc.language.iso.fl_str_mv |
por |
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por |
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600 600 |
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81ea1b7e-7dcf-438f-a839-b8cab12c5740 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
dc.publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.publisher.program.fl_str_mv |
Programa de Pós-Graduação em Química - PPGQ |
dc.publisher.initials.fl_str_mv |
UFSCar |
publisher.none.fl_str_mv |
Universidade Federal de São Carlos Câmpus São Carlos |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFSCAR instname:Universidade Federal de São Carlos (UFSCAR) instacron:UFSCAR |
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Universidade Federal de São Carlos (UFSCAR) |
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UFSCAR |
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UFSCAR |
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Repositório Institucional da UFSCAR |
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