slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Tom Jenkins, Professor Department of Animal & Veterinary Sciences PowerPoint Presentation
Download Presentation
Tom Jenkins, Professor Department of Animal & Veterinary Sciences

Loading in 2 Seconds...

play fullscreen
1 / 22

Tom Jenkins, Professor Department of Animal & Veterinary Sciences - PowerPoint PPT Presentation


  • 78 Views
  • Uploaded on

Rumen Transformations of Lipid. Tom Jenkins, Professor Department of Animal & Veterinary Sciences. Rumen Transformations of Lipid Review of Dietary Lipid. Fatty acids are most important lipid fraction . Majority of fatty acids are bound to glycerol as simple or compound lipids .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Tom Jenkins, Professor Department of Animal & Veterinary Sciences' - lisle


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Rumen Transformations of Lipid

Tom Jenkins, Professor

Department of Animal &

Veterinary Sciences

slide2

Rumen Transformations of Lipid

Review of Dietary Lipid

  • Fatty acids are most important lipid fraction.
  • Majority of fatty acids are bound to glycerol as simple or compound lipids.
  • Majority of fatty acids are unsaturated.
slide3

Rumen Transformations of Lipid

Learning Objectives

  • What happens to dietary lipid as it passes from the diet to the intestines and is metabolized by rumen microorganisms?
  • What are the intermediates and end products that accumulate in the rumen from lipid metabolism?
  • How does lipid transformations in the rumen affect animal performance?
slide4

Rumen Transformations of Lipid

Compounds Extracted in Fat Test?

Simple

Lipolysis

Compound

PUFA

Biohydrogenation

MUFA

Microbial Lipid Synthesis

VFA

slide5

Rumen Transformations of Lipid

How Does Dietary Lipid Change

as it Passes Through the Rumen?

47.9 lb. DMI

60% Forage

(mainly corn silage,

5 lbs. alfalfa hay)

From CPM for Dairy v.3.0.8

slide6

Rumen Transformations of Lipid

Rumen FA Transformations

Small

Intestine

Esophagus

Rumen

Large

Intestine

Rumen

Omasum

Reticulum

Abomasum

From CPM for Dairy v.3.0.8

slide7

Rumen Transformations of Lipid

Biohydrogenation

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

H

O

H

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

C

OH

H

H

H

H

H

H

H

H

H

H

H

H

H

Unsaturated (18:2)

Stearic (18:0)

slide8

Rumen Transformations of Lipid

Biohydrogenation

Unsaturated Fat

H

H

H

H

H

C

C

C

C

C

H

H

H

slide9

Rumen Transformations of Lipid

Biohydrogenation

H

H

H

H

H

C

C

C

C

C

H

H

H

H

H

slide10

Rumen Transformations of Lipid

Biohydrogenation

Saturated Fat

H

H

H

H

H

C

C

C

C

C

H

H

H

H

H

slide11

Rumen Transformations of Lipid

Biohydrogenation

Unsaturated (18:2)

CLA (18:2)

trans (18:1)

Stearic (18:0)

slide12

Rumen Transformations of Lipid

Biohydrogenation

Unsaturated Fat

H

H

H

H

H

C

C

C

C

C

H

slide13

Rumen Transformations of Lipid

Biohydrogenation

H

H

H

H

H

C

C

C

C

C

H

H

slide14

Rumen Transformations of Lipid

Biohydrogenation

CLA

H

H

H

H

C

C

C

C

C

H

H

slide15

Rumen Transformations of Lipid

CLA Intermediates in Digesta

Linoleic (18:2)

cis–9 trans–11 (18:2)

trans–11 (18:1)

Stearic (18:0)

From Teter, B.B., and T.C. Jenkins. 2006. In Advances in Conjugated Linoleic Acid Research, Vol. 3

slide16

Rumen Transformations of Lipid

Point 1–Diet Can Change BH

Linoleic Acid (cis–9, cis–12 C18:2)

Altered Pathways

Conjugated Linoleic Acid

(cis–9, trans–11 CLA)

Conjugated Linoleic Acid Isomers

trans–11 C18:1

trans–C18:1 Isomers

Stearic (C18:0)

Stearic (C18:0)

slide17

Rumen Transformations of Lipid

Point 2

MINOR intermediates of biohydrogenation can have MAJOR effects on animal performance and human health

slide18

Rumen Transformations of Lipid

Impact of Rumen Lipid Metabolism

  • Affects human health
    • Meat and milk higher in saturated fat
    • Bioactive metabolites
      • Anti-carcinogenic
      • Anti-atherogenic
      • Enhance immune system
slide19

Rumen Transformations of Lipid

Impact of Rumen Lipid Metabolism

  • Affects animal performance
    • Supply of essential fatty acids– reproduction
    • Fatty acid antimicrobial effects–production
    • Bioactive metabolites
      • Milk fat depression
slide20

Rumen Transformations of Lipid

Question

Match each of the below from the list of answers shown on the right. One answer per blank.

___ Abbreviation of the major fatty acid consumed by dairy cows

___ Increases FFA in rumen contents

___ Abbreviation of the CLA normally produced in the rumen

___ Greatly reduces the supply of essential fatty acids to body tissues

Biohydrogenation

cis–9, trans–11 18:2

Lipolysis

cis–9, cis–12 18:2

trans–11 C18:1

Peroxidation

slide21

Rumen Transformations of Lipid

Question

Which of the below is the best substrate for the synthesis of CLA in the rumen?

Omega–9 fatty acids

Essential fatty acids

Saturated fatty acids

None of the above

slide22

Rumen Transformations of Lipid

Questions & Answers

The Fatty Acid Forum sponsored by