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The colon and small intestine have inherent differences (e.g. redox status) that may explain the variation in cancer occurrence at these two sites. This study examined basal and induced (oxidative challenge) reactive oxygen species (ROS) generation, antioxidant enzyme activity and oxidative DNA damage. Basal ROS and antioxidant enzyme activities in the colon were greater than in the small intestine...
Docosahexaenoic acid (DHA) and butyrate favorably modulate colonocyte proliferation and apoptosis. In order to elucidate how oncogenic Ras modulates responses to these chemopreventive nutrients, we incubated isogenic non-transformed and Ras malignant transformed mouse colon cells with butyrate and DHA or linoleic acid (LA). Combining DHA with 1mM butyrate decreased proliferation relative to LA or...
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