| The effects of alpha-lactabumin and whey protein concentrate on dry matter recovery, TCA soluble protein levels, and peptide distribution in the rat gastrointestinal tract. | |
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MedLine Citation:
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PMID: 11332509 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of two dietary proteins on dry matter recovery, trichloroacetic acid (TCA) soluble protein concentration, and peptide distribution in gastrointestinal contents were investigated in rats trained to consume, in a single 2-hour daily meal, diets containing alpha-lactalbumin (alpha-LA) or whey protein concentrate (WPC) for two weeks. Compared with the WPC diet, the alpha-LA diet emptied faster from the stomach. Dry matter recovery was higher in the stomach contents of rats fed the WPC diet than in those given the alpha-LA diet, but dry matter content in the small intestine was comparable. TCA soluble protein levels in the stomach and the small intestinal contents were also significantly (P < 0.001) higher in rats fed the WPC diet. The concentration of peptides having molecular weights (MW) ranging from 12,500-30,000 daltons (Da) was higher in the stomach contents of rats fed the WPC diet. Conversely, the level of peptides ranging from 5000-12,500 Da was higher in the stomach contents of rats fed the alpha-LA diet. For both diets, the small intestinal contents were characterized by high levels of amino acids and small peptides. These results suggest that the hydrolysis and absorption of alpha-LA is faster than that of WPC. |
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Authors:
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O T Pantako; L Lemieux; J Amiot |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Canadian journal of physiology and pharmacology Volume: 79 ISSN: 0008-4212 ISO Abbreviation: Can. J. Physiol. Pharmacol. Publication Date: 2001 Apr |
Date Detail:
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Created Date: 2001-05-02 Completed Date: 2001-09-20 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372712 Medline TA: Can J Physiol Pharmacol Country: Canada |
Other Details:
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Languages: eng Pagination: 320-8 Citation Subset: IM |
Affiliation:
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Department of Food and Nutrition Sciences, Faculty of Food and Agriculture Sciences, Dairy Research Center, Laval University, Sainte-Foy, QC, Canada. Odile.Pantako@aln.ulaval.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Dietary Proteins / pharmacokinetics* Digestion / physiology* Digestive System / metabolism* Gastric Emptying / physiology Intestinal Absorption / physiology Intestine, Small / metabolism Lactalbumin / pharmacokinetics* Male Milk Proteins / pharmacokinetics* Molecular Weight Peptides / metabolism* Rats Rats, Sprague-Dawley Trichloroacetic Acid / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Dietary Proteins; 0/Milk Proteins; 0/Peptides; 0/whey protein; 76-03-9/Trichloroacetic Acid; 9013-90-5/Lactalbumin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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