Linked Life Data

3147190

Source:http://linkedlifedata.com/resource/pubmed/id/3147190

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1989-4-6
pubmed:abstractText
The ratio at steady-state of alpha-ketoisocaproic acid (KIC) to leucine 13C enrichments in plasma during continuous infusion of [13C]leucine was examined in 58 studies under a variety of conditions. The ratio was lower (P less than 0.001) in 'arterialized' venous plasma (mean +/- SD 0.85 +/- 0.09) than in deep venous plasma (0.95 +/- 0.08), the sampling site enrichment differences being greater for leucine than for KIC. Variation in the ratio between the various conditions studied was largely explained by analytical variation. Three normal subjects were given an intravenous bolus dose of L-[1-13C, 15N]leucine. Both [13C]KIC and [13C]leucine appeared quantitatively in plasma within 10 min, indicating that both transamination of leucine and KIC, and their equilibration between intracellular fluid and plasma, is rapid. This study suggests that changes in sampling site, rather than in study conditions, are more likely to lead to variation in the KIC:leucine enrichment ratio. The lesser variation for KIC, and the rapid equilibration of the [13C]leucine bolus, favour KIC as tracee for [13C]leucine protein turnover studies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0014-2972
pubmed:author
pubmed:issnType
Print
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
639-43
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1988
pubmed:articleTitle
Relationships between plasma isotope enrichments of leucine and alpha-ketoisocaproic acid during continuous infusion of labelled leucine.
pubmed:affiliation
Nutrition Research Group, Clinical Research Centre, Harrow, U.K.
pubmed:publicationType
Journal Article