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Master's Dissertation
DOI
https://doi.org/10.11606/D.42.2011.tde-19032012-145318
Document
Author
Full name
Michelle dos Santos Menezes
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Santelli, Glaucia Maria Machado (President)
Baptista, Mauricio da Silva
Siviero, Fábio
Title in Portuguese
O papel do jaspamídeo na dinâmica do citoesqueleto de actina das células de melanoma: relação com migração e invasão.
Keywords in Portuguese
Actinas
Células cultivadas de tumor
Citoesqueleto
Fármacos
Melanoma
Metástase neoplásica
Abstract in Portuguese
No processo de metástase os movimentos de migração e invasão tem um papel essencial e em ambos a função dos microfilamentos é de grande importância. Neste contexto, o presente trabalho buscoui analisar os efeitos da droga jaspamídeo e após a determinação das concentrações de IC50 para as linhagens HT144 e NGM foram estudados os efeitos da droga. Os tratamentos mostraram que o fármaco atua desorganizando o citoesqueleto de modo dependente de sua concentração. Os ensaios de ferida mostraram diminuição da taxa de fechamento da área livre após os tratamentos e os ensaios de migração com placas de transwell mostraram que os grupos tratados sofrem aumento desse parâmetro. Nos ensaios de invasão com câmara de Boyden o tratamento mostrou-se efetivo apenas para a célula NGM quando tratadas com 75 nM de jaspamídeo e 30 mM de Y-27632. Quanto à migração, a linhagem NGM não completava este processo quando tratada com as concentrações do IC50 e do IC50/2 acrescido de Y-27632 e a linhagem HT144 apresenta aumento deste parâmetro quando tratado com jaspamídeo e 200 mM de NSC23766.
Title in English
The role of jaspamide in the actin cytoskeleton of melanoma cells: the relation between migration and invasion.
Keywords in English
Actins
Cultured tumor cells
Cytoskeleton
Drugs
Melanoma
Neoplasm metastasis
Abstract in English
Many signaling ways are involved in metastasis and the cellular migration and invasion are important in this context. The role of microfilaments is essential in mesenchymal and amoeboid migration. In this context, the present work aimed to analyze the effects of the drug jaspamide and. after the determination of the IC50 concentrations for the HT144 and NGM cell lines, the effects of the treatment with jaspamide were studied. The wound assays indicated a decrease in the free area after the treatments, and the migration assays with transwell showed that, after the inoculation with the drug, the cells increased the process of migration. In the invasion assays with Boydens chamber, the treatment with jaspamide was effective only in NGM cells, when they are treated with 75 nM of the drug plus 30 mM of Y-27632. Regarding the migration process, the NGM cell line did not show movement when treated with the IC50 concentration and the IC50/2 concentration plus Y-27632, and the HT144 cell line increases this parameter when treated with jaspamide and 200 mM of NSC23766.
 
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Publishing Date
2012-05-25
 
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