title: Effect of the tumor promoter 12-O-tetradecanoylphorbol-13-acetate and its nonpromoting analogue 4-O-methyl-TPA on dorsal dermal melanocytes of the Syrian golden hamster (Mesocricetus auratus).
abstract: The effect of the tumor promoter TPA and its inactive structural analogue 4-O-methyl-TPA on the induction of dorsal skin melanosis in the normal Syrian golden hamster and on the promotion of melanomas in DMBA-initiated animals was investigated. Both phenomena were observed in TPA-treated hamsters but could not be detected after exposure of animals to 4-O-methyl-TPA. In contrast to results obtained with a variety of other laboratory animals, neither TPA nor 4-O-methyl-TPA were able to induce epidermal hyperplasia of hamster dorsal skin.
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D006224:Cricetinae; D005260:Female; D008544:Melanocytes / Q000187:drug effects*; D008545:Melanoma / Q000139:chemically induced*; D008647:Mesocricetus; D010704:Phorbols / Q000009:adverse effects*; D012878:Skin Neoplasms / Q000139:chemically induced*; D013755:Tetradecanoylphorbol Acetate / Q000009:adverse effects* / Q000031:analogs & derivatives
chemical_list: D010704:Phorbols; D015127:9,10-Dimethyl-1,2-benzanthracene; C020922:4-O-methyl-12-O-tetradecanoylphorbol 13-acetate; D013755:Tetradecanoylphorbol Acetate