| Comparative effects in rats of intact wheat bran and two wheat bran fractions on the disposition of the mutagen 2-amino-3-methylimidazo[4,5-f]quinoline. | |
| | |
MedLine Citation:
|
PMID: 21939672 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Wheat bran protects against mutations and cancer, but contains different plant cell types that are likely to have different protective effects. We previously described the production and chemical characterisation of an aleurone-rich fraction (ARF) and a pericarp-rich fraction (PRF) from wheat grain. We compared these with whole bran (WB), fed to rats as 10% of a high fat AIN-76 diet. All bran-supplemented diets increased faecal bulk, in the order PRF>WB>ARF. PRF increased the activity of NAD(P)H:quinone acceptor oxidoreductase only in the forestomach, whereas ARF and WB enhanced levels of glutathione S-transferase in the duodenum. ARF but not PRF was digested and fermented, and also encouraged bacterial growth. Rats were gavaged with the radioactive mutagen (14)C-labelled IQ (2-amino-3-methylimidazo[4,5-f]quinoline), and effects of the brans on plasma radioactivity measured. Compared with the control diet, all bran-supplemented diets reduced the concentration of radioactivity in plasma, in the order ARF>PRF>WB. All brans increased faecal elimination of radioactivity, but only ARF and PRF enhanced urinary radioactivity. These data suggest that wheat bran may reduce mutation and cancers through direct adsorption and enhanced elimination of a dietary mutagen and/or its metabolites, and that wheat bran enriched in pericarp or aleurone cell walls may exert protective effects through different mechanisms. |
| | |
Authors:
|
Lynnette R Ferguson; Philip J Harris; Philip Kestell; Shuotun Zhu; Rex Munday; Christine M Munday |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2011-9-16 |
Journal Detail:
|
Title: Mutation research Volume: - ISSN: 0027-5107 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
|
Created Date: 2011-9-23 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0400763 Medline TA: Mutat Res Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2011. Published by Elsevier B.V. |
Affiliation:
|
Discipline of Nutrition, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand; Auckland Cancer Society Research Centre, Faculty of Medicine and Health Sciences, The University of Auckland, Auckland, New Zealand. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Dynamics and bifurcation of a model for hormonal control of the menstrual cycle with inhibin delay.
Next Document: The role of zinc in genomic stability.