Linked Life Data

11916923

Source:http://linkedlifedata.com/resource/pubmed/id/11916923

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2002-3-27
pubmed:abstractText
Sterol regulatory element binding protein (SREBP)-1 is a transcription factor with important roles in the control of fatty acid metabolism and adipogenesis. Little information is available regarding the expression of this molecule in human health or disease. Exposure of isolated human adipocytes to insulin enhanced SREBP1 gene expression and promoted its proteolytic cleavage to the active form. Furthermore, 3 h of in vivo hyperinsulinemia also significantly increased SREBP1 gene expression in human skeletal muscle. Transcript levels of SREBP1c, the most abundant isoform in adipose tissue, were significantly decreased in the subcutaneous adipose tissue of obese normoglycemic and type 2 diabetic subjects compared with that of nonobese normoglycemic control subjects. In skeletal muscle, SREBP1 expression was significantly reduced in type 2 diabetic subjects but not in obese subjects. Within the diabetic group, the extent of SREBP1 suppression was inversely related to metabolic control and was normalized by 3 h of in vivo hyperinsulinemia. Exposure of isolated human adipocytes to tumor necrosis factor-alpha (TNF-alpha) produced a marked and specific decrease in the mRNA encoding the SREBP1c isoform and completely blocked the insulin-induced cleavage of SREBP1 protein. Thus, both the expression and proteolytic maturation of human SREBP1 are positively modulated by insulin. The specific reduction in the SREBP1c isoform seen in the adipose tissue of obese and type 2 diabetic subjects can be recapitulated ex vivo by TNF-alpha, suggesting a possible mechanism for this association.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0012-1797
pubmed:author
pubmed:issnType
Print
pubmed:volume
51
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1035-41
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed-meshheading:11916923-Adipocytes, pubmed-meshheading:11916923-Adult, pubmed-meshheading:11916923-CCAAT-Enhancer-Binding Proteins, pubmed-meshheading:11916923-DNA-Binding Proteins, pubmed-meshheading:11916923-Diabetes Mellitus, pubmed-meshheading:11916923-Diabetes Mellitus, Type 2, pubmed-meshheading:11916923-Female, pubmed-meshheading:11916923-Gene Expression Regulation, pubmed-meshheading:11916923-Humans, pubmed-meshheading:11916923-Male, pubmed-meshheading:11916923-Obesity, pubmed-meshheading:11916923-Obesity, Morbid, pubmed-meshheading:11916923-Protein Isoforms, pubmed-meshheading:11916923-RNA, Messenger, pubmed-meshheading:11916923-Reference Values, pubmed-meshheading:11916923-Sterol Regulatory Element Binding Protein 1, pubmed-meshheading:11916923-Transcription, Genetic, pubmed-meshheading:11916923-Transcription Factors, pubmed-meshheading:11916923-Tumor Necrosis Factor-alpha
pubmed:year
2002
pubmed:articleTitle
Human obesity and type 2 diabetes are associated with alterations in SREBP1 isoform expression that are reproduced ex vivo by tumor necrosis factor-alpha.
pubmed:affiliation
Department of Clinical Biochemistry and Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't