ORIGINAL PAPER
Effect of diets varying in the type of dietary fibre and its combination with polyphenols on gut function, microbial activity and antioxidant status in rats
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1
University of Science and Technology,Department of Microbiology and Food Technology, Faculty of Agriculture and Biotechnology, Kordeckiego 20A, 85-225 Bydgoszcz, Poland
2
Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn Poland
3
Nicolaus Copernicus University, Collegium Medicum, Department of Regenerative Medicine, Karłowicza 24, 85-092 Bydgoszcz, Poland
4
Nicolaus Copernicus University, Collegium Medicum, Department and Clinic of Geriatrics, M. Curie Skłodowskiej 9, 85-094 Bydgoszcz, Poland
Publication date: 2016-08-25
Corresponding author
E. Żary-Sikorska
University of Science and Technology,Department of Microbiology and Food Technology, Faculty of Agriculture and Biotechnology, Kordeckiego 20A, 85-225 Bydgoszcz, Poland
J. Anim. Feed Sci. 2016;25(3):250-258
KEYWORDS
ABSTRACT
The aim of the study was to assess the effects of dietary supplementation
with chicory root meal (CHIC) or apple pomace (POM), containing
both dietary fibre and polyphenols, on selected physiological parameters in
rats. Forty Wistar rats were divided into 5 groups of 8 animals each and fed
control (C) diet with 10% of cellulose or diets containing CHIC, POM, oligofructose
(OLIGOF) or pectin (PEC) for 28 days. The supplements were added
to experimental groups in order to obtain the corresponding to the C group
the non-digestible carbohydrates content. Indices of caecal fermentation,
antioxidant status, lipid peroxidation and lipid profile of rats were assessed.
Supplementing POM and CHIC to rat diets decreased (P ≤ 0.05) the caecal pH
and ammonia concentration, bacterial β-glucuronidase activity and increased
the short-chain fatty acid concentration and pool size in comparison to the C
group. In POM group the triacylglycerol (TAG) and thiobarbituric acid-reactive
substances concentration was lower in comparison to C and to OLIGOF and
C groups, respectively. The examined preparations significantly (P ≤ 0.05) decreased
TAG and total cholesterol levels in blood, but had no influence on liver
functioning parameters and antioxidant biomarkers such as sodium dismutase
and glutathione peroxidase activity or antioxidant capacity of water- and lipid-soluble
serum fractions. So, supplementing rats with POM and CHIC beneficially
modulated microbial activity in the caecum and blood lipid profile.
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