Gene Set: MARIADASON_REGULATED_BY_HISTONE_ACETYLATION_DN

Standard name MARIADASON_REGULATED_BY_HISTONE_ACETYLATION_DN
Systematic name M1552
Brief description Cluster 10: genes down-regulated in SW260 cells (colon cancer) by sodium butyrate and TSA [PubChem=5222465;5562] with the same kinetics with which each alters the level of histone H4 acetylation.
Full description or abstract The short-chain fatty acid butyrate, produced by microbial fermentation of dietary fiber in the large intestine, is a physiological regulator of major pathways of colonic epithelial cell maturation: cell cycle arrest, lineage-specific differentiation, and apoptosis. Microarray analysis of 8,063 sequences demonstrated a complex cascade of reprogramming of SW620 colonic epithelial cells upon treatment with butyrate characterized by the progressive recruitment of gene sets as a function of time. Comparison with the effects of trichostatin A, in conjunction with differences in the kinetics of alteration of histone acetylation induced by butyrate and trichostatin A, identified subsets of induced and repressed genes likely coordinately regulated by altered histone acetylation. The butyrate response was also compared in detail with that of sulindac, a nonsteroidal anti-inflammatory drug with significant chemopreventive activity for colon cancer, and curcumin, a component of mustard and curry structurally and functionally related to sulindac that also has chemopreventive activity. Although gene clusters were identified that showed similar responses to butyrate and sulindac, the data were characterized by the extensive differences in the effects of the two agents. This was striking for functional classes of genes involved in signaling pathways and in cell cycle progression, although butyrate and sulindac induce a similar G0-G1 arrest, elevation of beta-catenin-Tcf signaling, and apoptotic cascade. As regards cell cycle arrest, the underlying mechanism in response to butyrate was most similar to that of the Caco-2 cell line that had spontaneously undergone a G0-G1 arrest and least similar to the G2-M arrest stimulated by curcumin. Thus, high-throughput microarray analysis of gene expression profiles can be used to characterize and distinguish the mechanisms of response of colonic epithelial cells to physiological and pharmacological inducers of cell maturation. This has important implications for characterization of chemopreventive agents and recognition of potential toxicity and synergies. The data bases, gene clusters, and analyses are available at http:// sequence.aecom.yu.edu/genome/.
Collection C2: curated gene sets
      CGP: chemical and genetic perturbations
Source publication Pubmed 10969808   Authors: Mariadason JM,Corner GA,Augenlicht LH
Exact source Suppl. File 2: cluster 10
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Organism Homo sapiens
Contributed by John Newman (University of Washington)
Source platform HUMAN_SEQ_ACCESSION
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Global Cancer Map (Broad Institute)
NCI-60 cell lines (National Cancer Institute)
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Version history 3.1: First introduced

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