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Publication type: Journal Article
Document type: Full Paper

Year: 2011

Author(s): Regmi, PR; Metzler-Zebeli, BU; Gänzle, MG; van Kempen, TA; Zijlstra, RT

Title: Starch with high amylose content and low in vitro digestibility increases intestinal nutrient flow and microbial fermentation and selectively promotes bifidobacteria in pigs.

Source: J Nutr. 2011; 141(7):1273-1280



Authors Vetmeduni Vienna:

Metzler-Zebeli Barbara


Abstract:
Diets containing different starch types can affect enzymatic digestion of starch and thereby starch availability for microbial fermentation in the gut. However, the role of starch chemistry in nutrient digestion and flow and microbial profile has been poorly explained. Eight ileal-cannulated pigs (29.4 ± 0.9 kg body weight) were fed 4 diets containing 70% purified starch (amylose content, <5, 20, 28, and 63%; reflected by in vitro maximal digestion rate; 1.06, 0.73, 0.38, and 0.22%/min, respectively) in a replicated 4 × 4 Latin square. Ileal and fecal starch output, postileal crude protein yield, fecal total SCFA and total butyrate content, and gene copies of Bifidobacterium spp. in feces were higher (P < 0.05) when pigs consumed the slowly digestible starch diet than the remaining 3 starch diets. The in vitro starch digestion rate had a negative, nonlinear relationship with ileal starch flow (R(2) = 0.98; P < 0.001). Ileal starch flow was positively related to Bifidobacterium spp. (R(2) = 0.27; P < 0.01), Lactobacillus group (R(2) = 0.22; P < 0.01), and total butyrate content (R(2) = 0.46; P < 0.01) but was not related to Enterobacteriaceae (R(2) < 0.00; P = 0.92). In conclusion, starch with high amylose content and low in vitro digestibility increased postileal nutrient flow and microbial fermentation and selectively promoted Bifidobacterium spp. in the distal gut.

Keywords Pubmed: Amylose/administration & dosage
Amylose/analysis
Animal Feed/analysis
Animal Nutritional Physiological Phenomena
Animals
Bifidobacterium/growth & development
Bifidobacterium/metabolism*
Butyrates/metabolism
Digestion/drug effects
Fermentation/drug effects
Ileum/drug effects
Ileum/metabolism
Ileum/microbiology
Intestinal Absorption/drug effects
Metagenome/drug effects
Starch/administration & dosage
Starch/chemistry*
Starch/pharmacokinetics*
Sus scrofa


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