Document Detail


NR4A orphan nuclear receptors influence retinoic acid and docosahexaenoic acid signaling via up-regulation of fatty acid binding protein 5.
MedLine Citation:
PMID:  19861119     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The orphan nuclear receptor (NR) Nurr1 is expressed in the developing and adult nervous system and is also induced as an immediate early gene in a variety of cell types. In silico analysis of human promoters identified fatty acid binding protein 5 (FABP5), a protein shown to enhance retinoic acid-mediated PPARbeta/delta signaling, as a potential Nurr1 target gene. Nurr1 has previously been implicated in retinoid signaling via its heterodimerization partner RXR. Since NRs are commonly involved in cross-regulatory control we decided to further investigate the regulatory relationship between Nurr1 and FABP5. FABP5 expression was up-regulated by Nurr1 and other NR4A NRs in HEK293 cells, and Nurr1 was shown to activate and bind to the FABP5 promoter, supporting that FABP5 is a direct downstream target of NR4A NRs. We also show that the RXR ligand docosahexaenoic acid (DHA) can induce nuclear translocation of FABP5. Moreover, via up-regulation of FABP5 Nurr1 can enhance retinoic acid-induced signaling of PPARbeta/delta and DHA-induced activation of RXR. We also found that other members of the NR4A orphan NRs can up-regulate FABP5. Thus, our findings suggest that NR4A orphan NRs can influence signaling events of other NRs via control of FABP5 expression levels.
Authors:
Nikolaos Volakakis; Eliza Joodmardi; Thomas Perlmann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-10-25
Journal Detail:
Title:  Biochemical and biophysical research communications     Volume:  390     ISSN:  1090-2104     ISO Abbreviation:  Biochem. Biophys. Res. Commun.     Publication Date:  2009 Dec 
Date Detail:
Created Date:  2009-11-30     Completed Date:  2010-01-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372516     Medline TA:  Biochem Biophys Res Commun     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1186-91     Citation Subset:  IM    
Affiliation:
Ludwig Institute for Cancer Research Ltd., Box 240, S-17177 Stockholm, Sweden.
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MeSH Terms
Descriptor/Qualifier:
Active Transport, Cell Nucleus
Cell Line
Docosahexaenoic Acids / metabolism*
Fatty Acid-Binding Proteins / genetics*
Gene Expression Regulation*
Humans
Nuclear Receptor Subfamily 4, Group A, Member 2 / metabolism*
PPAR gamma / metabolism
PPAR-beta / metabolism
Promoter Regions, Genetic
Retinoid X Receptor alpha / metabolism
Signal Transduction
Transcription, Genetic
Tretinoin / metabolism*,  pharmacology
Up-Regulation
Chemical
Reg. No./Substance:
0/FABP5 protein, human; 0/Fatty Acid-Binding Proteins; 0/NR4A2 protein, human; 0/Nuclear Receptor Subfamily 4, Group A, Member 2; 0/PPAR gamma; 0/PPAR-beta; 0/Retinoid X Receptor alpha; 25167-62-8/Docosahexaenoic Acids; 302-79-4/Tretinoin

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


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