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Master's Dissertation
DOI
10.11606/D.85.2012.tde-31052013-101630
Document
Author
Full name
Antonio José da Silva Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2013
Supervisor
Committee
Ribeiro, Martha Simões (President)
Martins, Rodrigo Alvaro Brandão Lopes
Nunez, Silvia Cristina
Title in Portuguese
Efeitos da terapia com laser baixa potência em melanoma: ensaios in vitro
Keywords in Portuguese
melanoma
migração celular
terapia a laser de baixa intensidade
viabilidade celular
Abstract in Portuguese
Embora a terapia com uso de laser de baixa potência (TLBP) seja uma modalidade terapêutica amplamente estudada no meio científico, sua aplicação na clínica médica ainda gera controvérsias, já que a literatura reporta que a TLBP é capaz de promover a proliferação e diferenciação de células tumorais. O objetivo deste estudo foi avaliar os efeitos da TLBP no crescimento celular usando como modelo a linhagem B16F10 de melanoma murino em estado de homeostase e estado redox, além de verificar o comportamento quimiotáxico da linhagem B16F10 por meio do ensaio de migração transwell em resposta à TLBP em diferentes densidades de energia. Foram montados cinco grupos experimentais utilizando um laser de emissão vermelha em λ = 660 nm: Grupo controle (GC) onde nenhuma irradiação foi realizada; G30 (30J/cm2); G60 (60J/cm2); G90 (90J/cm2); G120 (120J/cm2); G150 (150J/cm2), com as respectivas doses utilizadas. Todos os experimentos foram realizados em triplicata e os resultados obtidos foram submetidos à análise estatística. Sob as condições experimentais deste estudo, nossos resultados mostram que a TLBP neste comprimento de onda não promoveu mudanças no metabolismo celular nos tempos de 48 h e 72 h, independente do estado nutricional. Foi possível observar mudança no padrão de comportamento quimiotáxico da linhagem celular B16F10 irradiadas com laser de emissão vermelha.
Title in English
Efects of low level laser therapy on melanoma an in vitro study
Keywords in English
cell movement
cell survival
low-level laser therapy
melanoma
Abstract in English
The low power lasers (TLBP) is a therapeutic modality widely studied in scientific field, its application in clinical medicine still generates many conflicts since literature reports proliferation in cancer cells. The objective of this study was to evaluate the effects of TLBP on cell growth using as model the line B16F10 in state of homeostasis and redox state and investigate the chemotactic behavior of B16F10 lineage through transwell migration assay in response to TLBP in different energy densities. For this purpose five experimental groups were assembled using a laser emission at λ = 660 nm: control group (G0) where no irradiation was performed; G30 (30J/cm2), G60 (60J/cm2), G90 (90J/cm2); G120 (120J/cm2); G150 (150J/cm2) with the respective doses used. All experiments were performed in triplicate and the results were statistically analyzed. Under the experimental conditions of this study, our results show that TLBP did not induced changes in cellular metabolism that influence proliferation at 48 h and 72 h, independent nutritional status. It was possible to observe changes in behavior pattern chemotactic of cell line B16F10 with TLBP at red emission.
 
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2013SantosEfeitos.pdf (1.08 Mbytes)
Publishing Date
2013-06-06
 
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