Document Detail

Estrogen-related receptor alpha and PGC-1-related coactivator constitute a novel complex mediating the biogenesis of functional mitochondria.
MedLine Citation:
PMID:  20067526     Owner:  NLM     Status:  MEDLINE    
Mitochondrial biogenesis, which depends on nuclear as well as mitochondrial genes, occurs in response to increased cellular ATP demand. The nuclear transcriptional factors, estrogen-related receptor alpha (ERRalpha) and nuclear respiratory factors 1 and 2, are associated with the coordination of the transcriptional machinery governing mitochondrial biogenesis, whereas coactivators of the peroxisome proliferator-activated receptor gamma coactivator-1 (PGC-1) family serve as mediators between the environment and this machinery. In the context of proliferating cells, PGC-1-related coactivator (PRC) is a member of the PGC-1 family, which is known to act in partnership with nuclear respiratory factors, but no functional interference between PRC and ERRalpha has been described so far. We explored three thyroid cell lines, FTC-133, XTC.UC1 and RO 82 W-1, each characterized by a different mitochondrial content, and studied their behavior towards PRC and ERRalpha in terms of respiratory efficiency. Overexpression of PRC and ERRalpha led to increased respiratory chain capacity and mitochondrial mass. The inhibition of ERRalpha decreased cell growth and respiratory chain capacity in all three cell lines. However, the inhibition of PRC and ERRalpha produced a greater effect in the oxidative cell model, decreasing the mitochondrial mass and the phosphorylating respiration, whereas the nonphosphorylating respiration remained unchanged. We therefore hypothesize that the ERRalpha-PRC complex plays a role in arresting the cell cycle through the regulation of oxidative phosphorylation in oxidative cells, and through some other pathway in glycolytic cells.
Delphine Mirebeau-Prunier; Soazig Le Pennec; Caroline Jacques; Naig Gueguen; Julie Poirier; Yves Malthiery; Fr?d?rique Savagner
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-01-11
Journal Detail:
Title:  The FEBS journal     Volume:  277     ISSN:  1742-4658     ISO Abbreviation:  FEBS J.     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-09     Completed Date:  2010-03-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101229646     Medline TA:  FEBS J     Country:  England    
Other Details:
Languages:  eng     Pagination:  713-25     Citation Subset:  IM    
INSERM, UMR694, Angers, France.
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MeSH Terms
Cell Line, Tumor
Cell Proliferation / drug effects
Glycolysis / physiology
Mitochondria / genetics*
Oxidative Phosphorylation
Receptors, Estrogen / antagonists & inhibitors,  physiology*
Thyroid Neoplasms
Transcription Factors / physiology*
Reg. No./Substance:
0/ERRalpha estrogen-related receptor; 0/Receptors, Estrogen; 0/Transcription Factors; 0/peroxisome-proliferator-activated receptor-gamma coactivator-1

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