The effect of type II and type IV resistant starch on the hydrolysis of maize and wheat gelatinised starch catalysed by pancreatic α-amylase

Summary The effects of resistant starch on human metabolism are considered to be beneficial because they decrease postprandial glycaemia following ingestion of starch‐rich foods. Using type II and IV resistant starches, we found a direct competitive inhibitory effect on porcine pancreatic α‐amylase...

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Veröffentlicht in:International journal of food science & technology 2012-10, Vol.47 (10), p.2134-2140
Hauptverfasser: Bustos, Mariela Cecilia, Barrera, Gabriela N., Perez, Gabriela T., León, Alberto Edel
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container_issue 10
container_start_page 2134
container_title International journal of food science & technology
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creator Bustos, Mariela Cecilia
Barrera, Gabriela N.
Perez, Gabriela T.
León, Alberto Edel
description Summary The effects of resistant starch on human metabolism are considered to be beneficial because they decrease postprandial glycaemia following ingestion of starch‐rich foods. Using type II and IV resistant starches, we found a direct competitive inhibitory effect on porcine pancreatic α‐amylase action above 0.25 g/100 g affecting catalytic efficiency when wheat and maize starches were used as substrates. Because resistant starches do not gelatinise and no modifications of gelatinisation parameters were observed, we concluded that the inhibitory action of these types of polymer seem to be a consequence of impaired diffusion of enzyme, substrate or products because of an increase in branches in the two types of resistant starches used. Thus, the effects of type II and type IV resistant starches in lowering postprandial glycaemia not only involve modification of gut physiology, but also include direct inhibition of the first stage in the biochemical degradation of starch.
doi_str_mv 10.1111/j.1365-2621.2012.03080.x
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source Wiley Online Library Journals Frontfile Complete; Oxford Journals Open Access Collection
subjects Biochemistry
Biological and medical sciences
Cereal and baking product industries
Diffusion
Digestibility
enzyme activity
enzyme inhibitors
Food industries
Foods
Fundamental and applied biological sciences. Psychology
Human
Hydrolysis
Maize
starch
Starch and starchy product industries
Starches
type II and type IV resistant starch
Wheat
title The effect of type II and type IV resistant starch on the hydrolysis of maize and wheat gelatinised starch catalysed by pancreatic α-amylase
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