rdf:type |
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lifeskim:mentions |
|
pubmed:issue |
4801
|
pubmed:dateCreated |
1987-6-5
|
pubmed:abstractText |
The mechanisms whereby insulin increases diacylglycerol in BC3H-1 myocytes were examined. When [3H]arachidonate labeling of phospholipids was used as an indicator of phospholipase C activation, transient increases in [3H]diacylglycerol were observed between 0.5 and 10 minutes after the onset of insulin treatment. With [3H]glycerol labeling as an indicator of de novo phospholipid synthesis, [3H]diacylglycerol was increased maximally at 1 minute and remained elevated for 20 minutes. [3H]Glycerol-labeled diacylglycerol was largely derived directly from phosphatidic acid. Insulin increased de novo phosphatidic acid synthesis within 5 to 10 seconds; within 1 minute, this synthesis was 60 times greater than that of controls. Thus, the initial increase in diacylglycerol is due to both increased hydrolysis of phospholipids and a burst of de novo phosphatidic acid synthesis. After 5 to 10 minutes, de novo phosphatidic acid synthesis continues as a major source of diacylglycerol. Both phospholipid effects of insulin seem important for generating diacylglycerol and other phospholipid-derived intracellular signaling substances.
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pubmed:grant |
|
pubmed:language |
eng
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pubmed:journal |
|
pubmed:citationSubset |
IM
|
pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
May
|
pubmed:issn |
0036-8075
|
pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
1
|
pubmed:volume |
236
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
586-9
|
pubmed:dateRevised |
2011-11-17
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pubmed:meshHeading |
pubmed-meshheading:3107122-Arachidonic Acid,
pubmed-meshheading:3107122-Arachidonic Acids,
pubmed-meshheading:3107122-Cell Line,
pubmed-meshheading:3107122-Diglycerides,
pubmed-meshheading:3107122-Enzyme Activation,
pubmed-meshheading:3107122-Glycerides,
pubmed-meshheading:3107122-Glycerol,
pubmed-meshheading:3107122-Insulin,
pubmed-meshheading:3107122-Kinetics,
pubmed-meshheading:3107122-Muscles,
pubmed-meshheading:3107122-Phosphatidic Acids,
pubmed-meshheading:3107122-Phosphatidylinositols,
pubmed-meshheading:3107122-Phospholipids,
pubmed-meshheading:3107122-Type C Phospholipases
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pubmed:year |
1987
|
pubmed:articleTitle |
Insulin rapidly increases diacylglycerol by activating de novo phosphatidic acid synthesis.
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.
|