Document Detail


Stimulated in vivo synthesis of plasminogen activator inhibitor-1 in human adipose tissue.
MedLine Citation:
PMID:  22740034     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Plasminogen activator inhibitor type-1 (PAI-1) is one of the most important inhibitors of endogenous fibrinolysis. Adipose tissue is a suggested source of the elevated plasma levels of PAI-1 in obesity. The relation between PAI-1 and inflammation is of particular interest, but current knowledge regarding regulation of PAI-1 in adipose tissue is mainly based on animal studies or ex vivo experiments on human cultured adipocytes. So far, no study has described stimulated gene expression and protein synthesis of PAI-1 in vivo in human adipose tissue. We used open heart surgery as a model of acute systemic inflammation. Twenty-two male patients underwent blood sampling and omental and subcutaneous adipose tissue biopsies for gene expression studies before and after surgery. Expression and localisation of PAI-1 antigen was evaluated by immunohistochemistry. After surgery gene expression of PAI-1 increased 27-fold in omental adipose tissue and three-fold in subcutaneous adipose tissue, but no differences were found in tissue-type plasminogen activator (t-PA) mRNA. PAI-1 antigen was localised within endothelial cells and in the adipose tissue interstitium close to vessels. The upregulated gene expression and protein synthesis in adipose tissue was followed by increased concentrations of PAI-1 antigen in plasma. In conclusion, we present for the first time that an acute systemic inflammation in humans increased gene expression and protein synthesis of PAI-1 in adipose tissue and that this increase was most prominent in omental adipose tissue. PAI-1 synthesis in adipose tissue due to acute systemic inflammation may be a link between inflammation and impaired endogenous fibrinolysis.
Authors:
M Ekström; J Liska; P Eriksson; E Sverremark-Ekström; P Tornvall
Related Documents :
22819264 - Carbon monoxide (co)-releasing molecule-derived co regulates tissue factor and plasmino...
9578504 - Expression of mrna coding for four catecholamine-synthesizing enzymes in human adrenal ...
17196304 - Role of dorsomedial hypothalamic neuropeptide y in energy homeostasis.
8764284 - Effects of gold thioglucose on neuropeptide y messenger rna levels in the mouse hypotha...
18007614 - Protocols for the in situ pcr-amplification and detection of mrna and dna sequences.
2129394 - Cytokine gene expression in atopics: effect of il-4 on il-1 beta and il-6 mrna levels.
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-28
Journal Detail:
Title:  Thrombosis and haemostasis     Volume:  108     ISSN:  0340-6245     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7608063     Medline TA:  Thromb Haemost     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Mattias Ekström, MD, PhD, Department of Cardiology, Karolinska University Hospital, Solna, 171 76 Stockholm, Sweden, E-mail: mattias.ekstrom@karolinska.se, Tel.: +46 8 51771638, Fax: +46-8-311044.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Epidemiology of uromodulin-associated kidney disease - results from a nation-wide survey.
Next Document:  Research Integrity and Everyday Practice of Science.