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We examined the p53 response following acute exposure of mice to the colon-specific carcinogen azoxymethane (AOM). No overall induction of p53-regulated genes was observed in the mouse colon, and only a small subpopulation of apoptotic colonocytes showed increased Bax staining. In contrast, the liver showed dramatic increases in p53-regulated gene expression. Subdued p53 gene activation in the colon...
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