| Duodenal infusion of α-linolenic acid affects fatty acid metabolism in the mammary gland of lactating dairy cows. | |
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MedLine Citation:
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PMID: 22921622 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Increasing the concentration of α-linolenic acid (LNA; 18:3 cis-9,cis-12,cis-15) in blood might affect fatty acid (FA) metabolism in the mammary gland of dairy cows. The objective was to determine the effects of different arterial concentrations of 18:3 cis-9,cis-12,cis-15 (18:3n-3) achieved via duodenal infusions with LNA on mammary uptake [assessed via arterial-rectificative venous concentration (AC-RVC) differences], synthesis of FA, and mammary gland FA balance in lactating dairy cows. Four primiparous lactating Chinese Holstein cows fitted with duodenal cannulas were administered 2 treatments in a crossover design: LNA-rich FA infusion at varying concentrations (0, 100, 200, and 300 g/d) versus basal infusate control. Arterial concentration of 18:3n-3 increased quadratically (29.24, 134.1, 218.3, and 219.3 mg/L of plasma) as LNA infusion levels increased from 0 to 300 g/d. The mammary extraction rate and uptake of 18:3n-3 increased linearly as LNA infusion increased. The AC-RVC difference of total FA and 18:3n-3 increased more rapidly than arterial concentrations with all treatments. Increasing LNA infusion increased linearly the balance of 10:0 and 12:0, whereas it decreased linearly the 14:1 and 15:0 balances. Increasing arterial concentration of 18:3n-3 affects uptake and synthesis of FA in the mammary gland of lactating dairy cows. It is also suggested that the use of AC-RVC difference maybe an acceptable way to investigate mammary gland uptake and synthesis of FA. |
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Authors:
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G Yang; D P Bu; J Q Wang; Khas-Erdene; L Y Zhou; J J Loor |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-22 |
Journal Detail:
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Title: Journal of dairy science Volume: - ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-8-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, P.R. China 100193. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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