The chemical profile of senna velutina leaves and their antioxidant and cytotoxic effects

The chemical profile of senna velutina leaves and their antioxidant and cytotoxic effects

Author Campos, Jaqueline Ferreira Google Scholar
Hiramatsu de Castro, David Tsuyoshi Google Scholar
Damiao, Marcio Jose Google Scholar
Vieira Torquato, Heron F. Autor UNIFESP Google Scholar
Paredes-Gamero, Edgar J. Autor UNIFESP Google Scholar
Carollo, Carlos Alexandre Google Scholar
Estevinho, Leticia M. Google Scholar
Souza, Kely de Picoli Google Scholar
dos Santos, Edson Lucas Google Scholar
Abstract Natural products can be a source of biomolecules with antioxidant activity which are able to prevent oxidative stress-induced diseases and show antitumor activity, making them important sources of new anticancer drug prototypes. In this context, this study aimed to analyze the chemical composition of an ethanol extract of Senna velutina leaves and to assess its antioxidant and cytotoxic activities in leukemic cells. The antioxidant properties were evaluated using a DPPH free radical scavenging assay and by examining the extract's inhibition of AAPH-induced lipid peroxidation in human erythrocytes. Its cytotoxicity and possible mechanisms of action were assessed in Jurkat and K562 leukemic cell lines. The ethanol extract contained flavonoids, such as epigallocatechin, epicatechin, kaempferol heteroside, rutin, and dimeric and trimeric proanthocyanidin derivatives. The extract exhibited antioxidant activity by scavenging free radicals and antihemolytic action, and it decreased malondialdehyde content in human erythrocytes. Furthermore, the extract also induced leukemic cell death by activating intracellular calcium and caspase-3, decreasing mitochondrial membrane potential, and arresting the cell cycle in S and G2 phases. Hence, S. velutina leaf extract contains antioxidant and antileukemic biomolecules with potential applications in diseases associated with oxidative stress and in the inhibition of tumor cell proliferation.
Keywords Cell-Cycle Progression
Phenolic-Compounds
Free-Radicals
In-Vitro
Cancer
Proanthocyanidins
Extract
Flavonoids
Induction
Apoptosis
Language English
Sponsor Fundacao de Apoio ao Desenvolvimento do Ensino, Ciencia e Tecnologia do Mato Grosso do Sul (FUNDECT)
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Brazilian National Research Council (CNPq), Brazil
Date 2016
Published in Oxidative Medicine And Cellular Longevity. London, 2016.
ISSN 1942-0900 (Sherpa/Romeo, impact factor)
Publisher Hospital Clinicas, Univ Sao Paulo
Origin http://dx.doi.org/10.1155/2016/8405957
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000386287900001
URI http://repositorio.unifesp.br/handle/11600/49375

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