title: Prohibitin has an important role in adipocyte differentiation.
abstract: OBJECTIVE
  To investigate whether prohibitin (PHB) is a target gene in adipocyte differentiation and modulates insulin-induced adipocyte differentiation.
  
  
  METHODS
  3T3-L1 preadipocyte overexpressing wild-type PHB and PHB mutant (lacking tyrosine-114 phosphorylation site) with or without insulin.
  
  
  RESULTS
  The treatment of 3T3-L1 fibroblasts with insulin or peroxisome proliferator-activated receptor-γ agonist resulted in an upregulation of PHB in a dose- and time-dependent manner. An analysis of the PHB promoter sequence revealed the presence of putative insulin-response elements and CCAAT/enhancer-binding protein transcription elements within ∼1 kb upstream of the translation initiation site. The functional relevance of these sites was determined using reporter gene assay. Surprisingly, PHB was also found to be regulated by leptin. Furthermore, the overexpression of PHB in 3T3-L1 fibroblasts was sufficient to induce adipogenesis.
  
  
  CONCLUSIONS
  In summary, we have identified PHB as an important protein in adipocyte differentiation.
authors: Department of Internal Medicine, University of Manitoba, Winnipeg, MB, Canada.
authors: S R
authors: SR
authors: Ande
authors: Z
authors: Z
authors: Xu
authors: Y
authors: Y
authors: Gu
authors: S
authors: S
authors: Mishra
mesh_terms: D041721:3T3-L1 Cells; D017667:Adipocytes / Q000378:metabolism*; D050156:Adipogenesis / Q000235:genetics; D000818:Animals; D015153:Blotting, Western; D022762:CCAAT-Enhancer-Binding Proteins / Q000235:genetics / Q000378:metabolism; D002454:Cell Differentiation / Q000235:genetics; D005786:Gene Expression Regulation; D006801:Humans; D007328:Insulin / Q000378:metabolism*; D051379:Mice; D047495:PPAR gamma; D000091402:Prohibitins; D011401:Promoter Regions, Genetic; D060888:Real-Time Polymerase Chain Reaction; D012097:Repressor Proteins / Q000235:genetics*; D020218:Response Elements; D014157:Transcription Factors; D015854:Up-Regulation
chemical_list: D022762:CCAAT-Enhancer-Binding Proteins; D007328:Insulin; C000717328:PHB protein, human; D047495:PPAR gamma; D000091402:Prohibitins; D012097:Repressor Proteins; D014157:Transcription Factors