Abstract
Rice bran water extract (RBWE) and ethanol extract (RBEE) at 1.0mg/ml markedly inhibited the proliferation of LS174T human colon cancer cells. RBEE but not RBWE induced apoptosis. RBWE promoted the production of intestinal mucin (MUC2). Real-time RT-PCR demonstrated that RBWE up-regulated the expression of MUC2 and sucrase-isomaltase complex (a differentiation marker of colon cancer cells), and attenuated that of proliferating cell nuclear antigen at the mRNA level in a dose-dependent manner. These findings suggested that RBWE suppress the proliferation of colon cancer cells by inducting differentiation not apoptosis.
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