Changes in the gene expression profile of gastric cancer cells in response to ibuprofen: A gene pathway analysis

P. Bonelli, F. M. Tuccillo, R. Calemma, F. Pezzetti, A. Borrelli, R. Martinelli, A. De Rosa, D. Esposito, R. Palaia, G. Castello

Research output: Contribution to journalArticlepeer-review

Abstract

Nonsteroidal anti-inflammatory drugs possess antiproliferative activities that can affect cancer cells. The aim of this study was to examine the antiproliferative effects of ibuprofen on the MKN-45 cell line. Cells were treated with ibuprofen for 24, 48 or 72 h, and cell proliferation was evaluated by cell counting and 3H-thymidine incorporation. Using microarray technology, we studied changes in the gene expression profiles over time after ibuprofen treatment. Ibuprofen induced a dose-and time-dependent reduction in cell number without altering cell viability. Genes involved in the biological oxidation and G1/S checkpoint pathways were the most significantly represented at 24 h, whereas genes involved in the cell cycle and DNA replication pathways were represented at 48 and 72 h. Genes associated with the apoptosis pathway were also significantly represented at 72 h. Modulation of the expression of p53 and p53-induced genes (CDKN1A/p21 and GADD45), which are involved in the G1/S transition, suggested an effect of ibuprofen on cell-cycle progression. Using flow cytometry, we observed an early block in the G1 phase of the cell cycle after ibuprofen treatment. In addition, P450 family transcripts were upregulated and intracellular reactive oxygen species (ROS) was increased following 12 h of ibuprofen treatment. Ibuprofen induced ROS, which resulted in cellular alterations that promoted a p53-dependent G 1 blockade. These findings suggest that ibuprofen exerts its antiproliferative actions through cell-cycle control and the induction of apoptosis. Both of these mechanisms appear to be independent of ibuprofen's anti-inflammatory effects.

Original languageEnglish
Pages (from-to)412-418
Number of pages7
JournalPharmacogenomics Journal
Volume11
Issue number6
DOIs
Publication statusPublished - Dec 2011

Keywords

  • cell-cycle control
  • gene expression profile
  • ibuprofen
  • MKN-45 cell line
  • pathway analysis

ASJC Scopus subject areas

  • Pharmacology
  • Molecular Medicine
  • Genetics

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