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Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources

SIMPLE SUMMARY: The speed by which amino acids are absorbed into the blood after intake of different protein sources may affect their metabolism and utilization. A better understanding of the absorption pattern can be used to optimize the formulation of diets for pigs and to reduce the nitrogen excr...

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Autores principales: Nørgaard, Jan V., Florescu, Iulia C., Krogh, Uffe, Nielsen, Tina Skau
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8246322/
https://www.ncbi.nlm.nih.gov/pubmed/34200892
http://dx.doi.org/10.3390/ani11061740
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author Nørgaard, Jan V.
Florescu, Iulia C.
Krogh, Uffe
Nielsen, Tina Skau
author_facet Nørgaard, Jan V.
Florescu, Iulia C.
Krogh, Uffe
Nielsen, Tina Skau
author_sort Nørgaard, Jan V.
collection PubMed
description SIMPLE SUMMARY: The speed by which amino acids are absorbed into the blood after intake of different protein sources may affect their metabolism and utilization. A better understanding of the absorption pattern can be used to optimize the formulation of diets for pigs and to reduce the nitrogen excretion to the environment. We studied the amino acid appearance in blood of growing pigs after a meal, as influenced by protein source (wheat, soybean meal, enzyme-treated soybean meal, hydrothermally-treated rapeseed meal, casein, or hydrolyzed casein). The amino acid concentration in plasma was influenced by both time after feeding and the protein source. Overall, the highest concentrations were found at 60 min after feeding for all diets, and soybean meal had a prolonged AA absorption compared to especially casein and hydrolyzed casein. We conclude that the AA absorption profiles did not indicate clear differences among protein sources, allowing categorizing in fast and slow proteins sources, but the results show differences in the duration of AA absorption. ABSTRACT: The aim of the present study was to determine postprandial amino acid (AA) appearance in the blood of growing pigs as influenced by protein source. Seven growing pigs (average body weight 18 kg), in a 7 × 5 Youden square design, were fitted with a jugular vein catheter and fed seven diets containing wheat, soybean meal, enzyme-treated soybean meal, hydrothermally-treated rapeseed meal, casein, hydrolyzed casein, and a crystalline AA blend with the same AA profile as casein. The latter was not eaten by the pigs, therefore being excluded. Blood samples were collected at −30, 30, 60, 90, 120, 180, and 360 min after a meal and analyzed for free AA. Overall, plasma AA concentrations were highest 60 min after feeding. There were no differences in plasma AA concentration between casein and hydrolyzed casein, but soybean meal resulted in lower AA plasma concentrations compared with enzyme-treated soybean meal at 60 and 120 min after feeding. There were no differences between hydrothermally-treated rapeseed meal and soybean meal. In conclusion, the ingredients could not clearly be categorized as being slow or fast protein with regard to protein digestion and absorption of AA, but soybean meal resulted in a prolonged appearance of plasma AA compared to casein and hydrolyzed casein.
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spelling pubmed-82463222021-07-02 Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources Nørgaard, Jan V. Florescu, Iulia C. Krogh, Uffe Nielsen, Tina Skau Animals (Basel) Article SIMPLE SUMMARY: The speed by which amino acids are absorbed into the blood after intake of different protein sources may affect their metabolism and utilization. A better understanding of the absorption pattern can be used to optimize the formulation of diets for pigs and to reduce the nitrogen excretion to the environment. We studied the amino acid appearance in blood of growing pigs after a meal, as influenced by protein source (wheat, soybean meal, enzyme-treated soybean meal, hydrothermally-treated rapeseed meal, casein, or hydrolyzed casein). The amino acid concentration in plasma was influenced by both time after feeding and the protein source. Overall, the highest concentrations were found at 60 min after feeding for all diets, and soybean meal had a prolonged AA absorption compared to especially casein and hydrolyzed casein. We conclude that the AA absorption profiles did not indicate clear differences among protein sources, allowing categorizing in fast and slow proteins sources, but the results show differences in the duration of AA absorption. ABSTRACT: The aim of the present study was to determine postprandial amino acid (AA) appearance in the blood of growing pigs as influenced by protein source. Seven growing pigs (average body weight 18 kg), in a 7 × 5 Youden square design, were fitted with a jugular vein catheter and fed seven diets containing wheat, soybean meal, enzyme-treated soybean meal, hydrothermally-treated rapeseed meal, casein, hydrolyzed casein, and a crystalline AA blend with the same AA profile as casein. The latter was not eaten by the pigs, therefore being excluded. Blood samples were collected at −30, 30, 60, 90, 120, 180, and 360 min after a meal and analyzed for free AA. Overall, plasma AA concentrations were highest 60 min after feeding. There were no differences in plasma AA concentration between casein and hydrolyzed casein, but soybean meal resulted in lower AA plasma concentrations compared with enzyme-treated soybean meal at 60 and 120 min after feeding. There were no differences between hydrothermally-treated rapeseed meal and soybean meal. In conclusion, the ingredients could not clearly be categorized as being slow or fast protein with regard to protein digestion and absorption of AA, but soybean meal resulted in a prolonged appearance of plasma AA compared to casein and hydrolyzed casein. MDPI 2021-06-10 /pmc/articles/PMC8246322/ /pubmed/34200892 http://dx.doi.org/10.3390/ani11061740 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nørgaard, Jan V.
Florescu, Iulia C.
Krogh, Uffe
Nielsen, Tina Skau
Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title_full Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title_fullStr Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title_full_unstemmed Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title_short Amino Acid Absorption Profiles in Growing Pigs Fed Different Protein Sources
title_sort amino acid absorption profiles in growing pigs fed different protein sources
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8246322/
https://www.ncbi.nlm.nih.gov/pubmed/34200892
http://dx.doi.org/10.3390/ani11061740
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