Inhibition of carcinogen induced c-Ha-ras and c-fos proto-oncogenes expression by dietary curcumin

Background We investigated the chemopreventive action of dietary curcumin on 7,12-dimethylbenz(a)anthracene (DMBA)-initiated and 12,0-tetradecanoylphorbol-13-acetate (TPA)-promoted skin tumor formation in Swiss albino mice. Curcumin, a yellow coloring matter isolated from roots of Curcuma longa Linn, is a phenolic compound possessing antioxidant, free radical scavenger, and antiinflammatory properties. It has been shown by previously reported work that TPA-induced skin tumors were inhibited by topical application of curcumin, and curcumin has been shown to inhibit a variety of biological activities of TPA. Topical application of curcumin was reported to inhibit TPA-induced c-fos, c-jun and c-myc gene expression in mouse skin. This paper reports the effects of orally administered curcumin, which was consumed as a dietary component at concentrations of 0.2 % or 1 %, in ad libitum feeding. Results Animals in which tumors had been initiated with DMBA and promoted with TPA experienced significantly fewer tumors and less tumor volume if they ingested either 0.2% or 1% curcumin diets. Also, the dietary consumption of curcumin resulted in a significantly decreased expression of ras and fos proto-oncogenes in the tumorous skin, as measured by enhanced chemiluminesence Western blotting detection system (Amersham). Conclusions Whereas earlier work demonstrated that topical application of curcumin to mouse skin inhibited TPA-induced expression of c-fos, c-jun and c-myc oncogenes, our results are the first to show that orally consumed curcumin significantly inhibited DMBA- and TPA-induced ras and fos gene expression in mouse skin.

                                            [
  "009:25"
]
                                        

                                            {
  "fn": "NIH",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:info@nih.gov"
}
                                        

                                            [
  {
    "@type": "dcat:Distribution",
    "title": "Official Government Data Source",
    "mediaType": "text/html",
    "description": "Visit the original government dataset for complete information, documentation, and data access.",
    "downloadURL": "https://www.ncbi.nlm.nih.gov/pmc/articles/PMC32169/"
  }
]
                                        

                                            [
  "curcumin-chemoprevention",
  "dmba-induced-tumors",
  "nih",
  "oncogene-expression",
  "skin-cancer"
]
                                        

                                            [
  "009:033"
]
                                        

                                            {
  "name": "National Institutes of Health",
  "@type": "org:Organization"
}
                                        

                                            [
  "NIH"
]