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Rev. Inst. Adolfo Lutz (Online) ; 72(4): 309-315, 2013. ilus, tab
Article in Portuguese | LILACS, SES-SP, SESSP-CTDPROD, SES-SP, SESSP-IALPROD, SES-SP | ID: lil-742458

ABSTRACT

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-seo reagente de Folin-Ciocalteau. Os efeitos antiproliferativos dos extratos e de isolados de chalconas 1 e2 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.


Chemical investigation on the bioactive extracts from fruits of Campomanesia pubescens (Myrtaceae)resulted in the isolation of two chalcones. The isolated compounds were identified by means of spectroscopicanalysis (1H, 13C and 2D NMR), and by comparing with the data reported in the specific literature.Antioxidant capacity of extracts and fractions was determined using the oxygen radical absorbancecapacity (ORAC-FL) and DPPH assays; and the total soluble phenolic contents were measured by usingFolin-Ciocalteau reagent. The anti-proliferative effects of the extracts and of the chalcone isolates 1 and2 were determined in vitro against human cancer cells lineages U251 (glioma), UACC-62 (melanoma),MCF-7 (breast), NC1-ADR/RES (ovarian-resistant), 786.0 (kidney), NCI-H460 (lung), PC-3 (prostate),OVCAR-3 (ovarian), HT-29 (colon) and K562 (leukemia), and against non-cancerous cell line VERO.Hexanic extract and chalcone isolated compounds 1 and 2 showed potent antiproliferative effect againstcancer cell lineages with lower total growth inhibition (TGI) values than those found in control cell line.The highest activity of the chalcones 1 and 2 was observed against the MCF-7, PC-3 and HT-29 cell lines.


Subject(s)
Antioxidants/analysis , Chalcones , Phenolic Compounds/analysis , Fruit/chemistry , Myrtaceae/chemistry , Neoplasms/therapy
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