Title: Intestinal fermentation modulates postprandial acylcarnitine profile and nitrogen metabolism in a true carnivore: the domestic cat (Felis catus)
Authors: Verbrugghe, Adronie ×
Janssens, Geert P. J
Meininger, Eva
Daminet, Sylvie
Piron, Koen
Vanhaecke, Lynn
Wuyts, Birgitte
Buyse, Johan
Hesta, Myriam #
Issue Date: Oct-2010
Publisher: CABI Pub.
Series Title: British Journal of Nutrition vol:104 issue:7 pages:972-979
Abstract: N balance and postprandial acylcarnitine profile following intestinal fermentation of oligofructose and inulin were investigated in healthy cats. Two diets were tested in a crossover design: a commercial high-protein cat food supplemented with 4% DM oligofructose and inulin (spectrum: degree of polymerisation (DP) 2-10: 60 (SE 5)% DM; DP > 10: 28 (SE 5)% DM) as high-fermentable fibre (HFF) diet, and the same commercial diet supplemented with 4% DM cellulose as low-fermentable fibre diet. Eight adult cats were randomly allotted to each of the two diets at intervals of 4 weeks. At the end of each testing period, faeces and urine were collected over a 5-d period, and blood samples were obtained before and at the selected time points postprandially. No differences were found for N intake, N digestibility and faecal N excretion, whereas urinary N excretion was lower when the HFF diet was fed (P=0.044). N balance was positive in all the cats, and tended to be increased when the HFF diet was fed (P=0.079). Propionylcarnitine concentrations (P=0.015) and their area under the curve (AUC) (P=0.013) were increased when the HFF diet was fed, revealing a more pronounced production and absorption of propionate. Yet, methylmalonylcarnitine concentrations and concurrent AUC were not elevated when the HFF diet was fed, indicating reduced amino acid catabolism. 3-Hydroxy-3-methylglutarylcarnitine concentrations (P=0.026) and their AUC (P=0.028) were also reduced when the HFF diet was fed, implying diminished use of branched-chain amino acids as well. In healthy cats, oligofructose and inulin added to a high-protein diet were suggested to reduce postprandial amino acid-induced gluconeogenesis by substitution with propionate.
ISSN: 0007-1145
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Livestock-Nutrition-Quality (-)
× corresponding author
# (joint) last author

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