Rufibach, K; Stefanoni, N; Rey-Roethlisberger, V; Schneiter, P; Doherr, M G; Tappy, L; Blum, J W (2006). Protein synthesis in jejunum and liver of neonatal calves fed vitamin A and lactoferrin. Journal of dairy science, 89(8), pp. 3075-86. Savoy, Ill.: American Dairy Science Association
Full text not available from this repository. (Request a copy)Rates of protein synthesis (PS) and turnover are more rapid during the neonatal period than during any other stage of postnatal life. Vitamin A and lactoferrin (Lf) can stimulate PS in neonates. However, newborn calves are vitamin A deficient and have a low Lf status, but plasma vitamin A and Lf levels increase rapidly after ingestion of colostrum. Neonatal calves (n = 6 per group) were fed colostrum or a milk-based formula without or with vitamin A, Lf, or vitamin A plus Lf to study PS in the jejunum and liver. l-[(13)C]Valine was intravenously administered to determine isotopic enrichment of free (nonprotein-bound) Val (AP(Free)) in the protein precursor pool, atom percentage excess (APE) of protein-bound Val, fractional protein synthesis rate (FSR) in the jejunum and liver, and isotopic enrichment of Val in plasma (APE(Pla)) and in the CO(2) of exhaled air (APE(Ex)). The APE, AP(Free), and FSR in the jejunum and liver did not differ significantly among groups. The APE(Ex) increased, whereas APE(Pla) decreased over time, but there were no group differences. Correlations were calculated between FSR(Jej) and histomorphometrical and histochemical data of the jejunum, and between FSR(Liv) and blood metabolites. There were negative correlations between FSR(Liv) and plasma albumin concentrations and between FSR(Jej) and the ratio of villus height:crypt depth, and there was a positive correlation between FSR(Jej) and small intestinal cell proliferation in crypts. Hence, there were no effects of vitamin A and Lf and no interactions between vitamin A and Lf on intestinal and hepatic PS. However, FSR(Jej) was correlated with histomorphometrical traits of the jejunum and FSR(Liv) was correlated with plasma albumin concentrations.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > DVK - Clinical Research [discontinued] 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Experimental Clinical Research 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Physiology |
UniBE Contributor: |
Doherr, Marcus, Blum, Jürg |
ISSN: |
0022-0302 |
Publisher: |
American Dairy Science Association |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:45 |
Last Modified: |
05 Dec 2022 14:14 |
PubMed ID: |
16840625 |
Web of Science ID: |
000239026100028 |
URI: |
https://boris.unibe.ch/id/eprint/18629 (FactScience: 830) |
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