Guaraná a Caffeine-Rich Food Increases Oxaliplatin Sensitivity of Colorectal HT-29 Cells by Apoptosis Pathway Modulation

Title:Guaraná a Caffeine-Rich Food Increases Oxaliplatin Sensitivity of Colorectal HT-29 Cells by Apoptosis Pathway Modulation

Volume: 16 Issue: 8

Author(s): Francine Carla Cadoná, Alencar Kolinski Machado, Verônica Farina Azzolin, Fernanda Barbisan, Eduardo Bortoluzzi Dornelles, Werner Glanzner, Paulo Bayard Dias Gonçalves, Charles Elias Assmann, Euler Esteves Ribeiro and Ivana Beatrice Mânica da Cruz

Affiliation:

Keywords: Guaraná, HT-29, cancer colorectal, oxaliplatin.

Abstract: We investigated the in vitro effects of guaraná and its main metabolites (caffeine, theobromine and catechin) on cytotoxicity and cell proliferation on colorectal cancer (CRC) line HT-29 cells and on oxaliplatin sensitivity. The cells were exposed to different concentrations of guaraná extract with and without oxaliplatin. The concentrations of bioactive molecules were also estimated considering their potential proportion on guaraná hydro-alcoholic extract. Apoptosis effect was analyzed by annexin V quantification using flow cytometry, while apoptosis pathway gene modulation (p53, Bax/Bcl-2 genes ratio, caspases 8 and 3) was determined by qRT-PCR analysis. Cells exposed to guaraná at a concentration of 100 μg/mL presented a similar cytotoxic effect as HT-29 cells treated with oxaliplatin and did not affect the sensitivity of the drug. Guaraná presented cell anti-proliferative effect and increased anti-proliferative oxaliplatin sensitivity at all concentrations tested here. Guaraná was able to induce apoptosis and up-regulate the p53 and Bax/Bcl-2 genes.

Cite this article as:

Cadoná Carla Francine, Machado Kolinski Alencar, Azzolin Farina Verônica, Barbisan Fernanda, Dornelles Bortoluzzi Eduardo, Glanzner Werner, Gonçalves Bayard Dias Paulo, Assmann Elias Charles, Ribeiro Esteves Euler and Cruz Beatrice Mânica da Ivana, Guaraná a Caffeine-Rich Food Increases Oxaliplatin Sensitivity of Colorectal HT-29 Cells by Apoptosis Pathway Modulation, Anti-Cancer Agents in Medicinal Chemistry 2016; 16 (8) . https://dx.doi.org/10.2174/1871520616666151217121138