Absorption and metabolism of short‐chain fatty acids in ruminants
作者:
N.B. Kristensen,
A. Danfær,
N. Agergaard,
期刊:
Archiv für Tierernaehrung
(Taylor Available online 1998)
卷期:
Volume 51,
issue 2-3
页码: 165-175
ISSN:0003-942X
年代: 1998
DOI:10.1080/17450399809381916
出版商: Taylor & Francis Group
关键词: Ruminants;Metabolism;Short‐chain fatty acids
数据来源: Taylor
摘要:
Short‐chain fatty acids (SCFA),viz.acetate, propionate and butyrate are quantitatively important substrates in ruminant energy metabolism. In the reviewed literature, 16–44% of ME intake was recovered as portal appearance of SCFA. This is considerably lower than expected when related to the estimated intra‐gastric flux of SCFA. The discrepancy is caused by portal drained viscera metabolism of arterially abundant metabolites e.g., acetate and the metabolism of acetate and butyrate to acetoacetate and D‐3‐hydroxybu‐tyrate in the absorptive epithelia. Even though considerable variations between experiments on acetate and propionate appearance are found, there seems to be a great deal of evidence that the proportion of gastroin‐testinally produced acetate and propionate absorbed to the portal blood is 50–75%. The portal recovery of butyrate has been found to be between 10 and 36% dependent on intraruminal infusion rate.
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