Please use this identifier to cite or link to this item:
|Scopus||Web of Science®||Altmetric|
|Title:||Accumulation of promutagenic DNA adducts in the mouse distal colon after consumption of heme does not induce colonic neoplasms in the western diet model of spontaneous colorectal cancer|
Le Leu, R.
|Citation:||Molecular Nutrition and Food Research, 2014; 58(3):550-558|
|Jean Winter, Graeme P. Young, Ying Hu, Silvia W. Gratz, Michael A. Conlon and Richard K. Le Leu|
|Abstract:||Red meat is considered a risk factor for colorectal cancer (CRC). Heme is considered to promote colonic hyperproliferation and cell damage. Resistant starch (RS) is a food that ferments in the colon with studies demonstrating protective effects against CRC. By utilizing the western diet model of spontaneous CRC, we determined if feeding heme (as hemin chloride) equivalent to a high red meat diet would increase colonic DNA adducts and CRC and whether RS could abrogate such effects.Four groups of mice: control, heme, RS and heme + RS were fed diets for 1 or 18 months. Colons were analyzed for apoptosis, proliferation, DNA adducts "8-hydroxy-2-deoxyguanosine" and "O(6) -methyl-2-deoxyguanosine" (O(6) MeG), and neoplasms. In the short term, heme increased cell proliferation (p < 0.05). Changes from 1 to 18 months showed increased cell proliferation (p < 0.01) and 8-hydroxy-2-deoxyguanosine adducts (p < 0.05) in all groups, but only heme-fed mice showed reduced apoptosis (p < 0.01) and increased O(6) MeG adducts (p < 0.01). The incidence of colon neoplasms was not different between any interventions.We identified heme to increase proliferation in the short term, inhibit apoptosis over the long term, and increase O(6) MeG adducts in the colon over time although these changes did not affect colonic neoplasms within this mouse model.|
|Keywords:||Heme; 8-hydroxy-2-deoxyguanosine; O6-methyl-2-deoxyguanosine; red meat; resistant starch|
|Rights:||© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim|
|Appears in Collections:||Medicine publications|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.