Adaptation of healthy adult cats to select dietary fibers in vivo affects gas and short-chain fatty acid production from fiber fermentation in vitro

K. A. Barry, B. J. Wojcicki, L. L. Bauer, I. S. Middelbos, B. M. Vester Boler, K. S. Swanson, G. C. Fahey

Research output: Contribution to journalArticlepeer-review

Abstract

Nine young adult (1.73 ± 0.03 yr) male cats were used to determine the effects of microbial adaptation to select dietary fiber sources on changes in pH in vitro and on total and hydrogen gas, short- chain fatty acid (SCFA), and branched-chain fatty acid (BCFA) production. Cats were adapted to diets con- taining 4% cellulose, fructooligosaccharides (FOS), or pectin for 30 d before fecal sampling. Each cat was used as a single donor, and fecal inoculum was reacted with each of the aforementioned fiber substrates. Adaptation to dietary FOS resulted in a greater change in pH when exposed to FOS than pectin (adaptation × substrate, P < 0.001). When exposed to the FOS substrate, ad- aptation to dietary FOS or pectin increased hydrogen gas production (adaptation × substrate, P = 0.021). Adaptation to dietary FOS increased acetate and to- tal SCFA production when exposed to FOS substrate in vitro (adaptation × substrate, P = 0.001). When exposed to the FOS substrate, propionate production tended to increase with adaptation to dietary cellulose (adaptation × substrate, P = 0.060). The BCFA + valerate tended to decrease with adaptation to dietary FOS when exposed to FOS substrate in vitro (adapta- tion × substrate, P = 0.092). Fructooligosaccharides resulted in the greatest change in pH and production of total gas (P < 0.001), hydrogen gas (P < 0.001), acetate (P < 0.001), propionate (P < 0.001), butyrate (P < 0.001), total SCFA (P < 0.001), and total BCFA + valerate production (P < 0.001). Adaptation to the FOS or pectin diet increased production of hydrogen gas with FOS and pectin substrates. Adaptation to pectin increased (P = 0.033) total gas production with FOS and pectin substrates. Overall, adaptation to ei- ther FOS or pectin led to greater SCFA and gas pro- duction, but adaptation to FOS resulted in the greatest effect overall.

Original languageEnglish (US)
Pages (from-to)3163-3169
Number of pages7
JournalJournal of animal science
Volume89
Issue number10
DOIs
StatePublished - Oct 2011

Keywords

  • Adaptation
  • Cat
  • Fermentation
  • Fiber
  • Fructan
  • Microbiota

ASJC Scopus subject areas

  • Food Science
  • Animal Science and Zoology
  • Genetics

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