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Abstract Title:

Sucrose, glucose and fructose have similar genotoxicity in the rat colon and affect the metabolome.

Abstract Source:

Food Chem Toxicol. 2008 Feb;46(2):752-60. Epub 2007 Oct 1. PMID: 17988776

Abstract Author(s):

M Hansen, D Baunsgaard, H Autrup, U B Vogel, P Møller, R Lindecrona, H Wallin, H E Poulsen, S Loft, L O Dragsted

Article Affiliation:

The National Food Institute, Technical University of Denmark, 19 Mørkhøj Bygade, DK-2860 Søborg, Denmark. mxh@dfvf.dk

Abstract:

We have shown previously that a high sucrose intake increases the background level of somatic mutations and the level of bulky DNA adducts in the colon epithelium of rats. The mechanism may involve either glucose or fructose formed by hydrolysis of sucrose. Male Big Blue rats were fed 30% sucrose, glucose, fructose or potato starch as part of the diet. Mutation rates and bulky DNA adduct levels were determined in colon and liver. The concentration of short-chain fatty acids and pH were determined in caecum, C-peptide was determined in plasma, biomarkers for oxidative damage and proliferation were determined in colon, and a metabonomic analysis was performed in plasma and urine. The sugars increased the mutation rates in colon and the bulky adduct levels in colon and liver to a similar extent. All sugars decrease the caecal concentration of acetic acid and propionic acid. The metabonomic studies indicated disturbed amino acid metabolism and decrease in plasma and urinary acetate as a common feature for all sugars and confirmed triglyceridemic effects of fructose. In conclusion, the genotoxicity may be related to the altered chemical environment in the caecum and thereby also in the colon but we found no related changes in insulin resistance or oxidative stress.

Study Type : Animal Study

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