Molecules and Cells

Korean Society for Molecular and Cellular Biology (한국분자세포생물학회)
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Estrogen Receptor α Regulates Dlx3-Mediated Osteoblast Differentiation

  • Lee, Sung Ho (College of Pharmacy and Research Institute of Drug Development, Chonnam National University) ;
  • Oh, Kyo-Nyeo (College of Pharmacy and Research Institute of Drug Development, Chonnam National University) ;
  • Han, Younho (College of Pharmacy and Research Institute of Drug Development, Chonnam National University) ;
  • Choi, You Hee (College of Pharmacy and Research Institute of Drug Development, Chonnam National University) ;
  • Lee, Kwang-Youl (College of Pharmacy and Research Institute of Drug Development, Chonnam National University)
  • Received : 2015.10.21
  • Accepted : 2015.11.03
  • Published : 2016.02.29
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Abstract

Estrogen receptor ${\alpha}$ (ER-${\alpha}$), which is involved in bone metabolism and breast cancer, has been shown to have transcriptional targets. Dlx3 is essential for the skeletal development and plays an important role in osteoblast differentiation. Various osteogenic stimulators and transcription factors can induce the protein expression of Dlx3. However, the regulatory function of ER-${\alpha}$ in the Dlx3 mediated osteogenic process remains unknown. Therefore, we investigated the regulation of Dlx3 and found that ER-${\alpha}$ is a positive regulator of Dlx3 transcription in BMP2-induced osteoblast differentiation. We also found that ER-${\alpha}$ interacts with Dlx3 and increases its transcriptional activity and DNA binding affinity. Furthermore, we demonstrated that the regulation of Dlx3 activity by ER-${\alpha}$ is independent of the ligand (estradiol) binding domain. These results indicate that Dlx3 is a novel target of ER-${\alpha}$, and that ER-${\alpha}$ regulates the osteoblast differentiation through modulation of Dlx3 expression and/or interaction with Dlx3.

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References

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