Carcinogenesis Advance Access originally published online on February 19, 2004
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Carcinogenesis, Vol. 25, No. 7, 1293-1298,
July 2004
Carcinogenesis vol.25 no.7 © Oxford University Press 2004; all rights reserved.
ARTICLE |
DNA array analysis of the effects of aspirin on colon cancer cells: involvement of Rac1
Department of Experimental Internal Medicine, Academic Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
1 To whom correspondence should be addressed Email: j.c.hardwick{at}amc.uva.nl
Aspirin and other non-steroidal anti-inflammatory drugs show efficacy in the prevention of colon cancer. The mechanism by which they do this is unclear. We used a commercially available DNA microarray to study changes in gene expression in 1176 cancer related genes in the HT29 colon cancer cell line induced by aspirin. Overall we find more genes that are significantly induced than are repressed. The pattern of gene expression changes is different at high concentrations of aspirin (5 mM) than at lower levels (500 and 50 µM). Genes involved in DNA damage signaling, nucleotide metabolism and the stress response are induced, and cell cycle related genes repressed. The small GTPase Rac1 is highly induced and this was confirmed by immunoblotting. We show using immunohistochemistry that Rac1 is expressed in mature colonocytes at the intercrypt table in human and mouse colon tissue. These results support the previous findings that aspirin has different actions at high concentrations than at low concentrations and further show the use of DNA array technology in the investigation of drug mechanisms of action. Furthermore, they point towards a role for Rac1 in the action of aspirin in colon cancer.
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  E. Sagiv, U. Rozovski, D. Kazanov, E. Liberman, and N. Arber Gene Expression Analysis Proposes Alternative Pathways for the Mechanism by Which Celecoxib Selectively Inhibits the Growth of Transformed but not Normal Enterocytes Clin. Cancer Res., November 15, 2007; 13(22): 6807 - 6815. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 M.G. Luciani, C. Campregher, and C. Gasche Aspirin blocks proliferation in colon cells by inducing a G1 arrest and apoptosis through activation of the checkpoint kinase ATM Carcinogenesis, October 1, 2007; 28(10): 2207 - 2217. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. F. Zerbini, A. Czibere, Y. Wang, R. G. Correa, H. Otu, M. Joseph, Y. Takayasu, M. Silver, X. Gu, K. Ruchusatsawat, et al. A Novel Pathway Involving Melanoma Differentiation Associated Gene-7/Interleukin-24 Mediates Nonsteroidal Anti-inflammatory Drug-Induced Apoptosis and Growth Arrest of Cancer Cells Cancer Res., December 15, 2006; 66(24): 11922 - 11931. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. Nunez, R. A. Valero, L. Senovilla, S. Sanz-Blasco, J. Garcia-Sancho, and C. Villalobos Cell proliferation depends on mitochondrial Ca2+ uptake: inhibition by salicylate J. Physiol., February 15, 2006; 571(1): 57 - 73. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. L. Pool-Zobel, V. Selvaraju, J. Sauer, T. Kautenburger, J. Kiefer, K. K. Richter, M. Soom, and S. Wolfl Butyrate may enhance toxicological defence in primary, adenoma and tumor human colon cells by favourably modulating expression of glutathione S-transferases genes, an approach in nutrigenomics Carcinogenesis, June 1, 2005; 26(6): 1064 - 1076. [Abstract] [Full Text] [PDF]
|
|