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Critical role for Ebf1 and Ebf2 in the adipogenic transcriptional cascade
Beth Israel Deaconess Medical Center, Boston.
Astra Zeneca R&D.
Lund University.
Beth Israel Deaconess Medical Center, Boston.
2007 (English)In: Molecular and Cellular Biology, ISSN 0270-7306, E-ISSN 1098-5549, Vol. 27, no 2, 743-757 p.Article in journal (Refereed) Published
Abstract [en]

The Ebf (O/E) family of helix-loop-helix transcription factors plays a significant role in B lymphocyte and neuronal development. The three primary members of this family, Ebf1, 2, and 3, are all expressed in adipocytes, and Ebf1 promotes adipogenesis when overexpressed in NIH 3T3 fibroblasts. Here we report that these three proteins have adipogenic potential in multiple cellular models and that peroxisome proliferator-activated receptor (PPAR) is required for this effect, at least in part due to direct activation of the PPAR1 promoter by Ebf1. Ebf1 also directly binds to and activates the C/EBP promoter, which exerts positive feedback on C/EBP expression. Despite this, C/EBP is dispensable for the adipogenic action of Ebf proteins. Ebf1 itself is induced by C/EBPß and , which bind and activate its promoter. Reduction of Ebf1 and Ebf2 proteins by specific short hairpin RNA blocks differentiation of 3T3-L1 cells, suggesting a critical role for these factors and the absence of functional redundancy between members of this family. Altogether, these data place Ebf1 within the known transcriptional cascade of adipogenesis and suggest critical roles for Ebf1 and Ebf2.

Place, publisher, year, edition, pages
2007. Vol. 27, no 2, 743-757 p.
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-39962DOI: 10.1128/MCB.01557-06Local ID: 51868OAI: diva2:260811
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2010-05-20

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Sigvardsson, Mikael
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