title: Soluble arabinoxylan alters digesta flow and protein digestion of red meat-containing diets in pigs.
abstract: OBJECTIVE
  The aim of this study was to investigate how a moderate increase in dietary meat content combined (or not) with soluble fibre would influence protein digestion as well as digesta characteristics and flow.
  
  
  METHODS
  Four groups of pigs were fed Western-style diets (high-protein/high-fat) containing two types of barbecued red meat, one with and one without a wheat arabinoxylan-rich fraction. After 4 wk, digesta samples were collected from small and large intestinal sites and analyzed for protein, amino acids, dry matter, and acid-insoluble ash. Tissue samples were also collected from each site.
  
  
  RESULTS
  Arabinoxylan consumption led to somewhat lower apparent protein digestibility within the small and large intestines as well as shorter mean retention times. This suggests that the lowered protein digestibility is due, at least partly, to shorter access time to digestive proteases and absorptive surfaces. Additionally, digesta mass was higher in pigs fed arabinoxylan while dry matter (%) was lower, indicating an increased digesta water-holding capacity due to the presence of a soluble dietary fiber.
  
  
  CONCLUSIONS
  Data showed that solubilized wheat arabinoxylan provides potential health benefits through decreased protein digestibility, increased digesta mass, and reduced mean retention time, even for diets with a moderately higher protein content. These factors are associated with efficiency of digestion and satiety, both of which have implications for prevention of obesity and other health disorders.
authors.affiliation: The University of Queensland, ARC CoE Plant Cell Walls, Centre for Nutrition and Food Sciences, St. Lucia, Queensland, Australia; The University of Queensland, School of Agriculture and Food Sciences, Gatton, Queensland, Australia.
authors.forename: Dagong
authors.initials: D
authors.lastname: Zhang
authors.affiliation: The University of Queensland, ARC CoE Plant Cell Walls, Centre for Nutrition and Food Sciences, St. Lucia, Queensland, Australia. Electronic address: b.williams@uq.edu.au.
authors.forename: Barbara A
authors.initials: BA
authors.lastname: Williams
authors.affiliation: The University of Queensland, ARC CoE Plant Cell Walls, Centre for Nutrition and Food Sciences, St. Lucia, Queensland, Australia.
authors.forename: Deirdre
authors.initials: D
authors.lastname: Mikkelsen
authors.affiliation: The University of Queensland, School of Agriculture and Food Sciences, Gatton, Queensland, Australia.
authors.forename: Xiuhua
authors.initials: X
authors.lastname: Li
authors.affiliation: The University of Queensland, School of Veterinary Science, Gatton, Queensland, Australia.
authors.forename: Helen L
authors.initials: HL
authors.lastname: Keates
authors.affiliation: The University of Queensland, School of Agriculture and Food Sciences, Gatton, Queensland, Australia.
authors.forename: Allan T
authors.initials: AT
authors.lastname: Lisle
authors.affiliation: University of Adelaide, ARC CoE Plant Cell Walls, School of Agriculture, Food and Wine, Waite Campus, Glen Osmond, South Australia, Australia.
authors.forename: Helen M
authors.initials: HM
authors.lastname: Collins
authors.affiliation: University of Adelaide, ARC CoE Plant Cell Walls, School of Agriculture, Food and Wine, Waite Campus, Glen Osmond, South Australia, Australia.
authors.forename: Geoffrey B
authors.initials: GB
authors.lastname: Fincher
authors.affiliation: CSIRO Food Futures National Research Flagship, Adelaide, South Australia, Australia.
authors.forename: Anthony R
authors.initials: AR
authors.lastname: Bird
authors.affiliation: CSIRO Food Futures National Research Flagship, Adelaide, South Australia, Australia.
authors.forename: David L
authors.initials: DL
authors.lastname: Topping
authors.affiliation: The University of Queensland, ARC CoE Plant Cell Walls, Centre for Nutrition and Food Sciences, St. Lucia, Queensland, Australia.
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Gidley
authors.affiliation: The University of Queensland, ARC CoE Plant Cell Walls, Centre for Nutrition and Food Sciences, St. Lucia, Queensland, Australia; The University of Queensland, School of Agriculture and Food Sciences, Gatton, Queensland, Australia.
authors.forename: Wayne L
authors.initials: WL
authors.lastname: Bryden
mesh_terms: D000818:Animals; D004032:Diet; D004043:Dietary Fiber / Q000494:pharmacology*; D004044:Dietary Proteins / Q000378:metabolism*; D004063:Digestion; D005766:Gastrointestinal Contents / Q000737:chemistry; D005772:Gastrointestinal Transit; D007413:Intestinal Mucosa / Q000378:metabolism*; D008297:Male; D059748:Proteolysis; D000069466:Red Meat; D013552:Swine; D014908:Triticum / Q000737:chemistry; D014867:Water / Q000378:metabolism; D014990:Xylans / Q000494:pharmacology*
chemical_list: D004043:Dietary Fiber; D004044:Dietary Proteins; D014990:Xylans; D014867:Water; C085118:arabinoxylan
keywords: Arabinoxylan; Intestinal retention time; Microbial biomass; Pig model; Protein digestion; Water-holding capacity