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Absorption and metabolism of alpha-ketoglutarate in growing pigs

Kristensen, NB; Jungvid, H; Fernandez, JA and Pierzynowski, Stefan LU (2002) In Journal of Animal Physiology and Animal Nutrition 86(7-8). p.239-245
Abstract
The portal appearance of enteral alpha-ketoglutarate (AKG) and the effect of enteral or parenteral AKG on portal net appearance of glucose, short-chain fatty acids, alanine, aspartate, glutamate, glutamine, proline and insulin were investigated in three growing pigs. During the experimental samplings the pigs were fed hourly with a standard feed mix with 5% glucose (control), 5% AKG (enteral) or no feed additive but continuously infused with AKG into the mesenteric vein in an amount equivalent to 5% of feed intake (parenteral). The arterial plasma concentration of AKG increased (p < 0.05) following both enteral (from 16+/-2 to 22+/-3 mumol/l) and parenteral (from 16+/-2 to 425+/-27 mumol/l) administration of AKG. With the enteral... (More)
The portal appearance of enteral alpha-ketoglutarate (AKG) and the effect of enteral or parenteral AKG on portal net appearance of glucose, short-chain fatty acids, alanine, aspartate, glutamate, glutamine, proline and insulin were investigated in three growing pigs. During the experimental samplings the pigs were fed hourly with a standard feed mix with 5% glucose (control), 5% AKG (enteral) or no feed additive but continuously infused with AKG into the mesenteric vein in an amount equivalent to 5% of feed intake (parenteral). The arterial plasma concentration of AKG increased (p < 0.05) following both enteral (from 16+/-2 to 22+/-3 mumol/l) and parenteral (from 16+/-2 to 425+/-27 mumol/l) administration of AKG. With the enteral treatment 4+/-1% of the AKG could be accounted for in the portal vein, however, with the parenteral treatment 86+/-5% could be accounted for in the portal vein. The arterial plasma concentration of proline increased (p < 0.05) with the enteral treatment (365 +/- 3 to 443 +/- 39 mumol/l), but was not affected by the parenteral treatment (p > 0.10). The plasma concentration glutamine decreased (p < 0.05) with the parenteral treatment only. The portal net appearance of proline showed a numerical increase with the enteral treatment but no other affects on arterial concentrations or portal net appearance were found. A small accompanying study showed that only small amounts of enteral AKG was present in the small intestine. It was therefore concluded that enteral AKG has a low availability to peripheral tissues either because it is absorbed and metabolized in the stomach and duodenum or because it is metabolized by microbes in the stomach. The study showed that AKG is metabolized differently following enteral and parenteral application in growing pigs. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Animal Physiology and Animal Nutrition
volume
86
issue
7-8
pages
239 - 245
publisher
Wiley-Blackwell
external identifiers
  • wos:000177258100005
  • pmid:15379910
ISSN
0931-2439
language
English
LU publication?
yes
id
e40a05bc-8792-418b-8fd7-734f4eeee4c6 (old id 331995)
date added to LUP
2007-11-07 14:56:17
date last changed
2016-04-16 05:22:22
@article{e40a05bc-8792-418b-8fd7-734f4eeee4c6,
  abstract     = {The portal appearance of enteral alpha-ketoglutarate (AKG) and the effect of enteral or parenteral AKG on portal net appearance of glucose, short-chain fatty acids, alanine, aspartate, glutamate, glutamine, proline and insulin were investigated in three growing pigs. During the experimental samplings the pigs were fed hourly with a standard feed mix with 5% glucose (control), 5% AKG (enteral) or no feed additive but continuously infused with AKG into the mesenteric vein in an amount equivalent to 5% of feed intake (parenteral). The arterial plasma concentration of AKG increased (p &lt; 0.05) following both enteral (from 16+/-2 to 22+/-3 mumol/l) and parenteral (from 16+/-2 to 425+/-27 mumol/l) administration of AKG. With the enteral treatment 4+/-1% of the AKG could be accounted for in the portal vein, however, with the parenteral treatment 86+/-5% could be accounted for in the portal vein. The arterial plasma concentration of proline increased (p &lt; 0.05) with the enteral treatment (365 +/- 3 to 443 +/- 39 mumol/l), but was not affected by the parenteral treatment (p &gt; 0.10). The plasma concentration glutamine decreased (p &lt; 0.05) with the parenteral treatment only. The portal net appearance of proline showed a numerical increase with the enteral treatment but no other affects on arterial concentrations or portal net appearance were found. A small accompanying study showed that only small amounts of enteral AKG was present in the small intestine. It was therefore concluded that enteral AKG has a low availability to peripheral tissues either because it is absorbed and metabolized in the stomach and duodenum or because it is metabolized by microbes in the stomach. The study showed that AKG is metabolized differently following enteral and parenteral application in growing pigs.},
  author       = {Kristensen, NB and Jungvid, H and Fernandez, JA and Pierzynowski, Stefan},
  issn         = {0931-2439},
  language     = {eng},
  number       = {7-8},
  pages        = {239--245},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Animal Physiology and Animal Nutrition},
  title        = {Absorption and metabolism of alpha-ketoglutarate in growing pigs},
  volume       = {86},
  year         = {2002},
}