Duodenal infusion of α-linolenic acid affects fatty acid metabolism in the mammary gland of lactating dairy cows
Journal of Dairy Science, ISSN: 0022-0302, Vol: 95, Issue: 10, Page: 5821-5830
2012
- 15Citations
- 26Captures
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Metrics Details
- Citations15
- Citation Indexes15
- 15
- CrossRef11
- Captures26
- Readers26
- 26
Article Description
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.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022030212006091; http://dx.doi.org/10.3168/jds.2011-4893; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84867100496&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/22921622; https://linkinghub.elsevier.com/retrieve/pii/S0022030212006091; https://dx.doi.org/10.3168/jds.2011-4893
American Dairy Science Association
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