Linked Life Data

7074018

Source:http://linkedlifedata.com/resource/pubmed/id/7074018

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1982-7-19
pubmed:abstractText
Metabolic substrates such as octanoate, beta-hydroxybutyrate, and alpha-ketoisocaproate which produce acetoacetate stimulate the rate of pyruvate decarboxylation in perfused livers from fed rats at perfusate pyruvate concentrations in the physiological range (below 0.2 mM). A quantitative relationship between pyruvate oxidation (14CO2 production from [1-14C]pyruvate) and ketogenesis (production of acetoacetate or total ketone bodies) was observed with all ketogenic substrates when studied over a wide range of concentrations. The ratio of extra pyruvate decarboxylated to extra acetoacetate produced was greater than 1 with octanoate and alpha-ketoisocaproate, but it was less than 1 with beta-hydroxybutyrate. The stimulatory effect of beta-hydroxybutyrate on pyruvate decarboxylation was abolished completely in the presence of 0.1 mM alpha-cyanocinnamate, an inhibitor of the pyruvate transporting system in the mitochondrial membrane. The data suggest that the mechanism by which the flux through the pyruvate dehydrogenase reaction is stimulated in liver under ketogenic conditions involves an acceleration of the net rate of pyruvate transport into the mitochondria compartment due to an exchange with acetoacetate and/or acetoacetate plus beta-hydroxybutyrate.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0006-2960
pubmed:author
pubmed:issnType
Print
pubmed:day
19
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
346-53
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1982
pubmed:articleTitle
Role of pyruvate transporter in the regulation of the pyruvate dehydrogenase multienzyme complex in perfused rat liver.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't