Influence of food macrostructure on the kinetics of acidification in the pig stomach after the consumption of rice- and wheat-based foods: Implications for starch hydrolysis and starch emptying rate
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Date
2022-11-15
Open Access Location
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Journal ISSN
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Publisher
Elsevier Ltd
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(c) 2022 The Author/s
CC BY-NC-ND 4.0
CC BY-NC-ND 4.0
Abstract
How the stomach can serve as a biochemical environment for starch digestion and the implications on starch emptying are not well-understood. Biochemical changes during gastric digestion of cooked wheat- and rice-based diets of varying particle size and microstructure were investigated using a growing pig model. In larger-particle size diets (rice grain, rice noodle, pasta), pH >3 was maintained in the proximal stomach digesta even until 240 min digestion, resulting in extended remaining amylase activity and accumulation of maltose from starch hydrolysis in the stomach. In smaller-particle size diets (couscous, rice couscous, semolina porridge), gastric acidification occurred faster to produce homogeneous intragastric pH and deactivated amylase. The hypothesis of the study was that food macrostructure would impact gastric acidification kinetics, and the resulting biochemical environment for starch hydrolysis in the stomach may further affect the mechanisms of food breakdown in the stomach and gastric emptying of starch.
Description
Keywords
Amylase activity, Food structure, Gastric acidification, Gastric digestion, Starch hydrolysis, Amylases, Animals, Digestion, Edible Grain, Hydrogen-Ion Concentration, Hydrolysis, Kinetics, Oryza, Starch, Stomach, Swine, Triticum
Citation
Nadia J, Olenskyj AG, Subramanian P, Hodgkinson S, Stroebinger N, Estevez TG, Singh RP, Singh H, Bornhorst GM. (2022). Influence of food macrostructure on the kinetics of acidification in the pig stomach after the consumption of rice- and wheat-based foods: Implications for starch hydrolysis and starch emptying rate.. Food Chem. 394. (pp. 133410-).