title: Current Hypothesis for the Relationship between Dietary Rice Bran Intake, the Intestinal Microbiota and Colorectal Cancer Prevention.
abstract: Globally, colorectal cancer (CRC) is the third most common form of cancer. The development of effective chemopreventive strategies to reduce CRC incidence is therefore of paramount importance. Over the past decade, research has indicated the potential of rice bran, a byproduct of rice milling, in CRC chemoprevention. This was recently suggested to be partly attributable to modification in the composition of intestinal microbiota when rice bran was ingested. Indeed, previous studies have reported changes in the population size of certain bacterial species, or microbial dysbiosis, in the intestines of CRC patients and animal models. Rice bran intake was shown to reverse such changes through the manipulation of the population of health-promoting bacteria in the intestine. The present review first provides an overview of evidence on the link between microbial dysbiosis and CRC carcinogenesis and describes the molecular events associated with that link. Thereafter, there is a summary of current data on the effect of rice bran intake on the composition of intestinal microbiota in human and animal models. The article also highlights the need for further studies on the inter-relationship between rice bran intake, the composition of intestinal microbiota and CRC prevention.
authors.affiliation: The Nethersole School of Nursing, The Chinese University of Hong Kong, Shatin, the New Territories, Hong Kong, China. winnieso@cuhk.edu.hk.
authors.forename: Winnie K W
authors.initials: WK
authors.lastname: So
authors.affiliation: The Nethersole School of Nursing, The Chinese University of Hong Kong, Shatin, the New Territories, Hong Kong, China. bernardlaw@cuhk.edu.hk.
authors.forename: Bernard M H
authors.initials: BM
authors.lastname: Law
authors.affiliation: The Nethersole School of Nursing, The Chinese University of Hong Kong, Shatin, the New Territories, Hong Kong, China. patricklaw@cuhk.edu.hk.
authors.forename: Patrick T W
authors.initials: PT
authors.lastname: Law
authors.affiliation: The Nethersole School of Nursing, The Chinese University of Hong Kong, Shatin, the New Territories, Hong Kong, China. whchan@cuhk.edu.hk.
authors.forename: Carmen W H
authors.initials: CW
authors.lastname: Chan
authors.affiliation: The Nethersole School of Nursing, The Chinese University of Hong Kong, Shatin, the New Territories, Hong Kong, China. sychair@cuhk.edu.hk.
authors.forename: Sek Ying
authors.initials: SY
authors.lastname: Chair
mesh_terms: D015179:Colorectal Neoplasms / Q000517:prevention & control*; D004043:Dietary Fiber / Q000008:administration & dosage* / Q000032:analysis*; D041981:Gastrointestinal Tract / Q000382:microbiology*; D006801:Humans; D064307:Microbiota; D012275:Oryza; D000067348:Whole Grains
keywords: colorectal cancer; intestinal microbiota; microbial dysbiosis; rice bran