Document Type : Research article
Química de Plantas Colombianas, Institute of Chemistry, Faculty of Exact and Natural Sciences, University of Antioquia, UdeA, Calle 70 No. 52–21, A.A 1226, Medellín, Colombia.
Grupo de Investigación e Innovación en Formulaciones Químicas, Escuela de ciencias de la vida, EIA University, km 2 + 200 Vía José María Córdova airport, Postal Code 055428, Envigado, Colombia.
Grupo de Estudios Botánicos, Institute of Biology, Faculty of Exact and Natural Sciences, University of Antioquia UdeA, A.A. 1226 Medellín, Colombia.
Chemoprevention with natural products may provide important alternatives in the search for new drugs to treat cancer. Thus, the ethanol extract of Bomarea setacea and its secondary metabolite (chromone) were evaluated in-vitro in SW480 and SW620 human adenocarcinoma colon cells to identify a possible effect on cell growth, antiproliferative and/or proapoptotic activity. The ethanol extract did not show growth inhibition of these cell lines 48 h after treatment; besides, it required higher concentration and time to have an antiproliferative effect. On the other hand, although the chromone was not as active as the reference drug (5-FU), it displayed a greater selectivity, being 156-fold more selective against SW480 cells (SI => 100) and 255-fold against SW620 cells (SI => 86,9). Additionally, the chromone caused an important arrest in G2/M (44.18%) with an important accumulation in subG0/G1 phase in SW620 cells, inducing loss in mitochondrial membrane potential and damage in the cell membrane of both cell lines, with activation of caspase 3, suggesting an apoptotic process independent of ROS production and p53 activation.