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美国华盛顿消息:据加利福尼亚大学医学院副教授Lucien R Jacobs称,纤维不但至今尚未被证明是癌症的预防物,而且可能是促癌物,尤其是早餐谷类食物中的纤维及宣传为防癌的食用纤维。 Jacobs一直以纤维食品喂饲大白鼠,检查大鼠结肠上皮细胞的生长情况。他说,一般认为纤维以两种途径防止结肠癌的发生:(1)在消化道中结合致癌物及促癌物,将其排除于作用部位之外;(2)通过对短链脂肪酸的发酵,提高肠酸度,抑制致癌物的生物活性。但他的研究结果却得出了完全不同的结论,即pH值降低能明显促进上皮细胞的生长,促进体内致癌物导致肿瘤形成。
WASHINGTON, USA (Reuters) - According to Lucien R Jacobs, associate professor of medicine at the University of California School of Medicine, fiber has not so far been proven to be a prophylaxis of cancer and may be a carcinogen, especially in breakfast cereals and as an anti-cancer dietary fiber . Jacobs has been feeding rats with fiber food, check the growth of rat colon epithelial cells. He said that the fiber is generally considered two ways to prevent the occurrence of colon cancer: (1) in the digestive tract in combination with carcinogens and carcinogens, to exclude it from the site of action; (2) by short-chain fatty acid fermentation, Increase the degree of intestinal acid, inhibit the biological activity of carcinogens. However, his findings have led to a completely different conclusion that a decrease in pH can significantly promote epithelial cell growth and promote carcinogenesis in vivo resulting in tumor formation.