Effects of improved amino acid balance diet on lysine mammary utilization, whole body protein turnover and muscle protein breakdown on lactating sows.

Amino acid Efficiency Lactating sows Protein breakdown Protein turnover Reduced protein diet

Journal

Journal of animal science and biotechnology
ISSN: 1674-9782
Titre abrégé: J Anim Sci Biotechnol
Pays: England
ID NLM: 101581293

Informations de publication

Date de publication:
07 May 2024
Historique:
received: 07 12 2023
accepted: 05 03 2024
medline: 7 5 2024
pubmed: 7 5 2024
entrez: 6 5 2024
Statut: epublish

Résumé

The study objective was to test the hypothesis that low crude protein (CP) diet with crystalline amino acids (CAA) supplementation improves Lys utilization efficiency for milk production and reduces protein turnover and muscle protein breakdown. Eighteen lactating multiparous Yorkshire sows were allotted to 1 of 2 isocaloric diets (10.80 MJ/kg net energy): control (CON; 19.24% CP) and reduced CP with "optimal" AA profile (OPT; 14.00% CP). Sow body weight and backfat were recorded on d 1 and 21 of lactation and piglets were weighed on d 1, 14, 18, and 21 of lactation. Between d 14 and 18, a subset of 9 sows (CON = 4, OPT = 5) was infused with a mixed solution of 3-[methyl- Over the 21-d lactation period, compared to CON, sows fed OPT had greater litter growth rate (P < 0.05). Compared to CON, sows fed OPT had greater efficiency of Lys (P < 0.05), Lys mammary flux (P < 0.01) and whole-body protein turnover efficiency (P < 0.05). Compared to CON, sows fed OPT tended to have lower whole body protein breakdown rate (P = 0.069). Muscle protein breakdown rate did not differ between OPT and CON (P = 0.197). Feeding an improved AA balance diet increased efficiency of Lys and reduced whole-body protein turnover and protein breakdown. These results imply that the lower maternal N retention observed in lactating sows fed improved AA balance diets in previous studies may be a result of greater partitioning of AA towards milk rather than greater body protein breakdown.

Sections du résumé

BACKGROUND BACKGROUND
The study objective was to test the hypothesis that low crude protein (CP) diet with crystalline amino acids (CAA) supplementation improves Lys utilization efficiency for milk production and reduces protein turnover and muscle protein breakdown. Eighteen lactating multiparous Yorkshire sows were allotted to 1 of 2 isocaloric diets (10.80 MJ/kg net energy): control (CON; 19.24% CP) and reduced CP with "optimal" AA profile (OPT; 14.00% CP). Sow body weight and backfat were recorded on d 1 and 21 of lactation and piglets were weighed on d 1, 14, 18, and 21 of lactation. Between d 14 and 18, a subset of 9 sows (CON = 4, OPT = 5) was infused with a mixed solution of 3-[methyl-
RESULTS RESULTS
Over the 21-d lactation period, compared to CON, sows fed OPT had greater litter growth rate (P < 0.05). Compared to CON, sows fed OPT had greater efficiency of Lys (P < 0.05), Lys mammary flux (P < 0.01) and whole-body protein turnover efficiency (P < 0.05). Compared to CON, sows fed OPT tended to have lower whole body protein breakdown rate (P = 0.069). Muscle protein breakdown rate did not differ between OPT and CON (P = 0.197).
CONCLUSION CONCLUSIONS
Feeding an improved AA balance diet increased efficiency of Lys and reduced whole-body protein turnover and protein breakdown. These results imply that the lower maternal N retention observed in lactating sows fed improved AA balance diets in previous studies may be a result of greater partitioning of AA towards milk rather than greater body protein breakdown.

Identifiants

DOI: 10.1186/s40104-024-01020-9 PMID: 38711075
pubmed: 38711075
doi: 10.1186/s40104-024-01020-9
pii: 10.1186/s40104-024-01020-9
doi:

Types de publication

Journal Article

Langues

eng

Pagination

65

Subventions

Organisme : USDA-NIFA
ID : 2014-67015-21832

Informations de copyright

© 2024. The Author(s).

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Auteurs

Sai Zhang (S)

Department of Animal Science, Michigan State University, East Lansing, 48824, USA.
State Key Laboratory of Swine and Poultry Breeding Industry, Key Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, PR China.

Juan C Marini (JC)

USDA/ARS Children's Nutrition Research Center and Pediatric Critical Care Medicine, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA.

Vengai Mavangira (V)

Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI, 48824, USA.

Andrew Claude (A)

Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, MI, 48824, USA.

Julie Moore (J)

Department of Animal Science, Michigan State University, East Lansing, 48824, USA.

Mahmoud A Mohammad (MA)

USDA/ARS Children's Nutrition Research Center and Pediatric Critical Care Medicine, Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA.

Nathalie L Trottier (NL)

Department of Animal Science, Michigan State University, East Lansing, 48824, USA. nlt35@cornell.edu.
Present address: Department of Animal Science, Cornell University, Frank Morrison Hall, 507 Tower Road, Ithaca, NY, 14853-4801, USA. nlt35@cornell.edu.

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