Inhibitory Effects of Opuntia humifusa on 7, 12-Dimethyl-benz[a]anthracene and 12-O-tetradecanoylphorbol-13-acetate Induced Two-stage Skin Carcinogenesis
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چکیده
منابع مشابه
Inhibitory effect of stevioside on tumor promotion by 12-O-tetradecanoylphorbol-13-acetate in two-stage carcinogenesis in mouse skin.
Four steviol (ent-kaurene-type diterpenoid) glycosides, stevioside, rebaudiosides A and C, and dulcoside A, have been isolated from Stevia rebaudiana BERTONI. These compounds showed strong inhibitory activity against 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced inflammation in mice. The 50% inhibitory dose of these compounds for TPA-induced inflammation was 54.1-291.6 micro g/ear. Further...
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The effects of long term treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA) on estrogen receptor (ER) expression in the human breast cancer cell line, MCF-7, were studied. This study demonstrates that treatment of cells with the phorbol ester blocked estrogen receptor activity. Treatment of cells with 100 nM TPA resulted in an 80% decrease in the level of ER protein and a parallel decrea...
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Oleanolic acid (OA) has been shown to inhibit mouse skin tumor promotion by 12-O-tetradecanoylphorbol-13-acetate (TPA). This study was designed to examine the effect of OA on the TPA-induced expression of the ornithine decarboxylase (ODC) gene as well as other genes. OA inhibited the induction of ODC activity and mRNA level produced by TPA in the skin of female CD-1 mice. Preapplication of OA (...
متن کاملPromotion-like enhancement of tracheal carcinogenesis in rats by 12-O-tetradecanoylphorbol-13-acetate.
Experiments were conducted to determine whether two-stage carcinogenesis could be observed in rat tracheal epithelium using 7,12-dimethylbenz(a)anthracene (DMBA) as initiator and 12-O-tetradecanoylphorbol-13-acetate (TPA) as promoter. Heterotopic tracheal transplants in Fischer 344 rats were first exposed to 188 microgram of DMBA delivered over a four-week period and subsequently to 100 microgr...
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ژورنال
عنوان ژورنال: Asian Pacific Journal of Cancer Prevention
سال: 2012
ISSN: 1513-7368
DOI: 10.7314/apjcp.2012.13.9.4655