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Histochemistry and Cell Biology

, Volume 146, Issue 3, pp 289–300 | Cite as

Long-range enhancers modulate Foxf1 transcription in blood vessels of pulmonary vascular network

  • Hyejin Seo
  • Jinsun Kim
  • Gi-Hee Park
  • Yuri Kim
  • Sung-Won ChoEmail author
Original Paper

Abstract

Intimate crosstalk occurs between the pulmonary epithelium and the vascular network during lung development. The transcription factor forkhead box f1 (Foxf1) is expressed in the lung mesenchyme and plays an indispensable role in pulmonary angiogenesis. Sonic hedgehog (Shh), a signalling molecule, is expressed in lung epithelium and is required to establish proper angiogenesis. It has been suggested that Foxf1, a downstream target of the Shh signalling pathway, mediates interaction between angiogenesis and the epithelium in lung. However, there has been no clear evidence showing the mechanism how Foxf1 is regulated by Shh signalling pathway during lung development. In this study, we investigated the lung-specific enhancers of Foxf1 and the Gli binding on the enhancers. At first, we found three evolutionarily conserved Foxf1 enhancers, two of which were long-range enhancers. Of the long-range enhancers, one demonstrated tissue-specific activity in the proximal and distal pulmonary blood vessels, while the other one demonstrated activity only in distal blood vessels. At analogous positions in human, these long-range enhancers were included in a regulatory region that was reportedly repeatedly deleted in alveolar capillary dysplasia with misalignment of pulmonary vein patients, which indicates the importance of these enhancers in pulmonary blood vessel formation. We also determined that Gli increased the activity of one of these long-range enhancers, which was specific to distal blood vessel, suggesting that Shh regulates Foxf1 transcription in pulmonary distal blood vessel formation.

Keywords

Foxf1 Shh Enhancer Angiogenesis Lung development Endothelium 

Notes

Acknowledgments

We thank Prof. Shiroishi (National Institute of Genetics, Japan) for kindly providing pHSF51 plasmid. We thank H. K. Kim and J. K. Cho for animal care and J. W. Bok and M. H. Kim for constructive discussions and experimental guidance.

Authors’ contribution

H.S. and J.K. designed and performed the experiments and prepared the manuscript. Y.K. and G.H.P. helped with some experiments. S.W.C. coordinated the experimental design and prepared the manuscript.

Funding

This research was supported by the Bio & Medical Technology Development Program of the National Research Foundation (NRF) funded by the Korean government (MEST) (NRF-2012M3A9B2052522). This research was supported by BK21 PLUS Project, Yonsei University College of Dentistry.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Hyejin Seo
    • 1
    • 2
  • Jinsun Kim
    • 1
    • 2
  • Gi-Hee Park
    • 1
  • Yuri Kim
    • 1
    • 2
  • Sung-Won Cho
    • 1
    Email author
  1. 1.Division of Anatomy and Developmental Biology, Department of Oral BiologyYonsei University College of DentistrySeoulKorea
  2. 2.BK21 PLUS ProjectYonsei University College of DentistrySeoulKorea

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