Linked Life Data

15592487

Source:http://linkedlifedata.com/resource/pubmed/id/15592487

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2004-12-13
pubmed:abstractText
Obesity is associated with increased storage of lipids in nonadipose tissues like skeletal muscle, liver, and pancreatic beta cells. These lipids constitute a continuous source of long-chain fatty acyl CoA (LC-CoA) and derived metabolites like diacylglycerol and ceramide, acting as signalling molecules on protein kinases activities (in particular, the family of PKCs), ion channel, gene expression, and protein acylation. In skeletal muscle, the increase in LC-CoA and diacylglycerol translocates and activates specific protein kinase C (PKC) isoforms, which will phosphorylate IRS-1 on serine, preventing its phosphorylation on tyrosine and association with PI3 kinase. This interrupts the insulin signalling pathway leading to the stimulation of glucose transport. In pancreatic beta cells, short-term excess of fatty acids or LC-CoA activates PKC and also directly stimulates insulin exocytosis. Long-term exposure to free fatty acids (FFA) leads to an increased basal and blunted glucose-stimulated insulin secretion by affecting gene expression, increase in K(ATP) channel activity, and uncoupling of the mitochondria. In addition, the saturated FFA palmitate increases cell death by apoptosis via increase in ceramide synthesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0307-0565
pubmed:author
pubmed:issnType
Print
pubmed:volume
28 Suppl 4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
S53-7
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Fat storage in pancreas and in insulin-sensitive tissues in pathogenesis of type 2 diabetes.
pubmed:affiliation
Department of Cellular Physiology and Metabolism, Medical Faculty, University of Geneva, Switzerland. francoise.assimacopoulos@medicine.unige.ch
pubmed:publicationType
Journal Article, Review