Linked Life Data

177050

Source:http://linkedlifedata.com/resource/pubmed/id/177050

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1976-7-6
pubmed:abstractText
We have previously proposed on the basis of studies in hepatectomized animals that low density lipoproteins are degraded at a significant rate by peripheral tissues. To test the capacity of one peripheral cell type to catabolize low density lipoprotein, cultures of swine aortic smooth muscle cells were incubated with homologous 125I-labeled low density lipoprotein and uptake and degradation measured. Degradation of 125I-labeled low density lipoprotein to products soluble in trichloroacetic acid showed an initial lag period of 1--2 h after which the rate increased and remained linear for the following 15 h. Rates of degradation increased sharply with low density lipoprotein concentration over the lower range (from 0--25 mug protein/ml) and then more slowly up to the highest concentration tested, 300 mug protein/ml. Even at very low concentrations, 1 mug low density lipoprotein protein/ml (less than 10% of the plasma low density lipoprotein concentration), the in vitro degradation rate (per kg of smooth muscle cells) exceeded the in vivo degradation rate (per kg of total body weight). To the extent that smooth muscle cells are representative of other peripheral cells, the results support the proposal that peripheral degradation of low density lipoprotein apoprotein may be quantitatively important. The rate of incorporation of labeled acetate into sterols was suppressed in cells incubated with whole serum, low density and very low density lipoproteins, or suspensions of free cholesterol. In this respect, the results were similar to those observed in human skin fibroblasts studied concurrently. However, high density lipoprotein inhibited sterol synthesis by about 25% in swine smooth muscle cells while it had no effect in human skin fibroblasts.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
26
pubmed:volume
424
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
404-21
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1976
pubmed:articleTitle
Uptake and degradation of low density lipoprotein by swine arterial smoot muscle cells with inhibition of cholesterol biosynthesis.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.