In Vivo and In Vitro Starch Digestion: Are Current in Vitro Techniques Adequate?

The time evolution of the size distributions of (fully branched and debranched) starch molecules during in vivo and in vitro digestion was analyzed using size exclusion chromatography (SEC) and compared. In vivo digesta were collected from the small intestine of pigs fed with raw normal maize starch...

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Bibliographic Details
Published in:Biomacromolecules 2010-12, Vol.11 (12), p.3600-3608
Main Authors: Hasjim, Jovin, Lavau, Gautier Cesbron, Gidley, Michael J, Gilbert, Robert G
Format: Article
Language:English
Subjects:
Animals
Applied sciences
Biological and medical sciences
Chromatography, Gel
Digestion
Exact sciences and technology
Food industries
Fundamental and applied biological sciences. Psychology
Intestine, Small - metabolism
Natural polymers
Particle Size
Physicochemistry of polymers
Research Design
Starch - metabolism
Starch and polysaccharides
Starch and starchy product industries
Swine
Zea mays
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Summary:The time evolution of the size distributions of (fully branched and debranched) starch molecules during in vivo and in vitro digestion was analyzed using size exclusion chromatography (SEC) and compared. In vivo digesta were collected from the small intestine of pigs fed with raw normal maize starch; in vitro digestion was carried out on the same diet fed to the pigs using a method simulating digestion in the mouth, stomach, and small intestine. A qualitative difference was observed between the in vitro and the in vivo digestion. The former showed a degradation of starch molecules to a more uniform size, whereas the in vivo digestion preserved the size distribution of native starch before producing a multimodal distribution, the heterogeneous nature of which current in vitro methods do not reproduce. The use of in vitro digestion to infer in vivo digestion patterns and, hence, potential nutrition benefits need to take account of this phenomenon.
ISSN:1525-7797
1526-4602
DOI:10.1021/bm101053y