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  • Title: [Experimental carcinogenesis of the stomach and its modifiers].
    Author: Takahashi M.
    Journal: Gan To Kagaku Ryoho; 1983 Feb; 10(2 Pt 2):421-7. PubMed ID: 6881983.
    Abstract:
    Modifiers of gastric carcinogenesis are reviewed with evidence of experimental results using rats. 1) Physical modifiers: Route of administration, medium (vehicle) of carcinogens, detergents, dosage (concentration), period (frequency) of administration, exposure time, and condition of mucus. Effects of surfactants and presence of a foreign body in the stomach lumen are also samples of physical enhancing factors. 2) Biological modifiers: Species, genetics, sex, hormonal factors, nutrition, and age. Moreover, effect of preexisting ulceration is important. 3) Chemical modifiers: Chemical substances administered prior to, simultaneously with, or following exposure of experimental animals to chemical carcinogens, or promoters of carcinogenesis. Chemical modifiers are: co-initiators, tumor promoters and inhibitors. NaCl having both co-initiator and tumor promoter action on MNNG gastric carcinogenesis is clearly shown in our investigations.
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