Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/32948
Title: Coffee polyphenols change the expression of STAT5b and ATF-2 modifying cyclin D1 levels in cancer cells
Author: Oleaga, Carlota
Ciudad i Gómez, Carlos Julián
Noé Mata, Verónica
Izquierdo Pulido, María Luz
Keywords: Cafè
Polifenols
Cèl·lules canceroses
Càncer de mama
Càncer colorectal
Coffee brewing
Polyphenols
Cancer cells
Breast cancer
Colorectal cancer
Issue Date: 2012
Publisher: Hindawi
Abstract: Background: Epidemiological studies suggest that coffee consumption reduces the risk of cancer, but the molecular mechanisms of its chemopreventive effects remain unknown. Objective: To identify differentially expressed genes upon incubation of HT29 colon cancer cells with instant caffeinated coffee (ICC) or caffeic acid (CA) using whole genome microarrays. Results: ICC incubation of HT29 cells caused the overexpression of 57 genes and the underexpression of 161, while CA incubation induced the overexpression of 12 genes and the underexpression of 32. Using Venn-Diagrams, we built a list of five overexpressed genes and twelve underexpressed genes in common between the two experimental conditions. This list was used to generate a biological association network in which STAT5B and ATF-2 appeared as highly interconnected nodes. STAT5B overexpression was confirmed at the mRNA and protein levels. For ATF-2, the changes in mRNA levels were confirmed for both ICC and CA, whereas the decrease in protein levels was only observed in CA-treated cells. The levels of cyclin D1, a target gene for both STAT5B and ATF-2, were dowregulated by CA in colon cancer cells and by ICC and CA in breast cancer cells. Conclusions: Coffee polyphenols are able to affect cyclin D1 expression in cancer cells through the modulation of STAT5B and ATF-2.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1155/2012/390385
It is part of: Oxidative Medicine and Cellular Longevity, 2012, vol. 2012
Related resource: http://dx.doi.org/10.1155/2012/390385
URI: http://hdl.handle.net/2445/32948
ISSN: 1942-0900
Appears in Collections:Articles publicats en revistes (Bioquímica i Biomedicina Molecular)

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