Short-term variations of c18:1 trans fatty acids in plasma lipoproteins and ruminal fermentation parameters of non-lactating cows subjected to ruminal pulses of oils

Einar Vargas-Bello-pérez, Juan J. Loor, Philip C. Garnsworthy

Research output: Contribution to journalArticlepeer-review

Abstract

The objective of this study was to evaluate short-term variations of trans fatty acids (TFA) in plasma lipoproteins and ruminal fermentation parameters of non-lactating cows subjected to ruminal pulses of vegetable oils. Three non-lactating, non-pregnant Holstein cows, each with a ruminal cannula, were arranged in a 3 × 3 Latin square design with three-day pulsing periods and four-day washout intervals between treatments. Cows were treated with single ruminal pulses of: (1) control (skimmed milk (SM); 500 mL); (2) soybean oil (SO; 250 g/d in 500 mL of SM) and (3) partially-hydrogenated vegetable oil (PHVO; 250 g/d in 500 mL of SM). Time changes after infusion in TFA contents were only observed for plasma C18:1 trans-4, trans-5 and trans-12, and high-density lipoprotein fraction C18:1 trans-9. After ruminal pulses, concentration of acetate decreased linearly; molar concentrations of propionate and valerate increased linearly; molar concentrations of butyrate and isovalerate changed quadratically and were greater at 1 h than at other times. There was an accumulation of several C18:1 TFA in plasma and lipoproteins, especially on the third day of pulsing. Overall, naturally occurring C18:1 TFA isomers (produced during ruminal biohydrogenation of SO) and preformed TFA (supplied by PHVO) elicited differential TFA partitioning and transport in plasma and lipoproteins.

Original languageEnglish (US)
Article number788
Pages (from-to)1-15
Number of pages15
JournalAnimals
Volume11
Issue number3
DOIs
StatePublished - Mar 2021

Keywords

  • Biohydrogenation
  • Cows
  • Lipoproteins
  • Ruminal fluid
  • Trans fatty acids
  • Vaccenic acid

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

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