Linked Life Data

9270976

Source:http://linkedlifedata.com/resource/pubmed/id/9270976

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
1997-10-14
pubmed:abstractText
The nephrotic syndrome is associated with disturbances in plasma lipid pattern and metabolism. However, the reason for these perturbations is poorly understood. In the present study, we have investigated hepatic triglyceride metabolism in puromycin aminonucleoside-induced nephrotic syndrome in rats. Nephrotic rats displayed a 70% increase in hepatic triglyceride levels compared to controls (16.9 +/- 1.6 vs. 9.8 +/- 0.6 mumol/g liver; means +/- SEM, P < 0.01). The capacity for hepatic mitochondrial beta-oxidation of fatty acids was substantially elevated (80%). This was associated with a rise in the liver content of the fatty acid carrier carnitine (1.24 +/- 0.06 vs. 0.85 +/- 0.07 mumol/g dry weight, P < 0.05). A positive correlation between the levels of acetylcarnitine and acetyl-CoA was found in normal as well as in nephrotic rats, implying that carnitine plays an important role as an acetyl group acceptor in the liver under normo- and hyperlipidemic conditions. Changes in carnitine levels seem to be tightly coupled to the rate of fatty acid oxidation. There was a significant elevation in the activity of phosphatidate phosphohydrolase (E.C. 3.1.3.4) in liver microsomes from nephrotic rats (1.07 +/- 0.09 vs. 0.81 +/- 0.04 nmol/min.mg protein, P < 0.02). Hepatic very low density lipoprotein (VLDL)-triglyceride secretion rate was 18% higher in nephrotic rats than in controls. The results demonstrate a deranged hepatic triglyceride metabolism in nephrosis, with an increased hepatic triglyceride biosynthesis, a sizable accumulation of hepatic triglycerides, and only a modest increase in VLDL triglyceride secretion. In addition, mitochondrial beta-oxidation of fatty acids was enhanced, associated with an increased availability of carnitine.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0024-4201
pubmed:author
pubmed:issnType
Print
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
847-52
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:9270976-Acetyl Coenzyme A, pubmed-meshheading:9270976-Animals, pubmed-meshheading:9270976-Carnitine, pubmed-meshheading:9270976-Cholesterol, pubmed-meshheading:9270976-Cytosol, pubmed-meshheading:9270976-Disease Models, Animal, pubmed-meshheading:9270976-Fatty Acids, pubmed-meshheading:9270976-Lipid Metabolism, pubmed-meshheading:9270976-Lipids, pubmed-meshheading:9270976-Lipoproteins, VLDL, pubmed-meshheading:9270976-Liver, pubmed-meshheading:9270976-Male, pubmed-meshheading:9270976-Mitochondria, Liver, pubmed-meshheading:9270976-Nephrotic Syndrome, pubmed-meshheading:9270976-Oxidation-Reduction, pubmed-meshheading:9270976-Phosphatidate Phosphatase, pubmed-meshheading:9270976-Puromycin Aminonucleoside, pubmed-meshheading:9270976-Rats, pubmed-meshheading:9270976-Rats, Sprague-Dawley, pubmed-meshheading:9270976-Triglycerides
pubmed:year
1997
pubmed:articleTitle
On the interrelationship between hepatic carnitine, fatty acid oxidation, and triglyceride biosynthesis in nephrosis.
pubmed:affiliation
Department of Medical Laboratory Sciences and Technology, Karolinska Institutet, Huddinge University Hospital, Sweden.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't