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The heat treatment and the gelation are strong determinants of the kinetics of milk proteins digestion and of the peripheral availability of amino acids.
MedLine Citation:
PMID:  23194515     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
This study aimed to determine the kinetics of milk protein digestion and amino acid absorption after ingestion of four dairy matrices by six minipigs: unheated or heated skim milk and corresponding rennet gels. Digestive contents and plasma samples were collected over a 7h-period after meal ingestion. Gelation of milk slowed down the outflow of the meal from the stomach and the subsequent absorption of amino acids, and decreased their bioavailability in peripheral blood. The gelled rennet matrices also led to low levels of milk proteins at the duodenum. Caseins and β-lactoglobulin, respectively, were sensitive and resistant to hydrolysis in the stomach with the unheated matrices, but showed similar digestion with the heated matrices, with a heat-induced susceptibility to hydrolysis for β-lactoglobulin. These results suggest a significant influence of the meal microstructure (resulting from heat treatment) and macrostructure (resulting from gelation process) on the different steps of milk proteins digestion.
Authors:
Florence Barbé; Olivia Ménard; Yann Le Gouar; Caroline Buffière; Marie-Hélène Famelart; Béatrice Laroche; Steven Le Feunteun; Didier Dupont; Didier Rémond
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Publication Detail:
Type:  Journal Article     Date:  2012-09-16
Journal Detail:
Title:  Food chemistry     Volume:  136     ISSN:  0308-8146     ISO Abbreviation:  Food Chem     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2012-11-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7702639     Medline TA:  Food Chem     Country:  England    
Other Details:
Languages:  eng     Pagination:  1203-12     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
INRA UMR 1253, Science et Technologie du Lait et de l'œuf, 65, rue de Saint Brieuc, 35000 Rennes, France; Agrocampus Ouest UMR 1253, Science et Technologie du Lait et de l'œuf, 35000 Rennes, France; Univ. Paris Sud-CNRS Supélec UMR 8506, Laboratoire des Signaux et Systèmes, 91192 Gif-sur-Yvette, France.
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