Palavras-chave
Campomanesia pubescens
DPPH
antiproliferativa
chalconas
Como Citar
Resumo
A investigação química dos extratos bioativos dos frutos de Campomanesia pubescens (Myrtaceae) resultou no isolamento de duas chalconas. Os compostos isolados foram identificados pelas análises espectroscópicas (1H, 13C e 2D RMN) e, por comparação com os dados descritos na literatura. A capacidade antioxidante dos extratos e frações foi determinada utilizando-se os ensaios de capacidade de absorção de oxigênio radical (ORAC-FL) e de DPPH; e os teores de fenólicos solúveis foram medidos utilizando-se o reagente de Folin-Ciocalteau. Os efeitos antiproliferativos dos extratos e de isolados de chalconas 1 e 2 foram determinados in vitro contra as seguintes células cancerosas humanas U251 (glioma), UACC-62 (melanoma), MCF-7 (mama), NC1-ADR/RES (ovário resistente), 786,0 (rim), NCI-H460 (pulmão), PC-3 (próstata), OVCAR-3 (ovário), HT-29 (cólon) e K562 (leucemia), e contra linhagem celular não cancerígena VERO. O extrato hexânico e os compostos isolados de chalconas 1 e 2 demonstraram efeito antiproliferativo potente contra linhagens de células cancerosas com valores de inibição de crescimento total (TGI) menores dos aqueles observados na linhagem celular controle. A atividade mais elevada das chalconas 1 e 2 foi detectada nas células MCF-7, PC-3 e HT-29.Referências
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Copyright (c) 2013 Claudia Andrea Lima Cardoso, Marcos José Salvador, João Ernesto Carvalho, Roberta Gomes Carvalho