Transcriptional activation of placental growth factor by the forkhead/winged helix transcription factor FoxD1

Hong Zhang, Rachel Palmer, Xiaobo Gao, Jordan Kreidberg, William Gerald, Lili Hsiao, Roderick V. Jensen, Steven R. Gullans, Daniel A. Haber

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Abstract

Stromal-epithelial interactions play an important role in renal organogenesis [1]. Expression of the forkhead/winged helix transcription factor FoxD1 (BF-2) is restricted to stromal cells in the embryonic renal cortex, but it mediates its effects on the adjacent ureteric bud and metanephric mesenchyme, which fail to grow and differentiate in BF-2 null mice [2]. BF-2 is therefore likely to regulate transcription of factors secreted by stromal cells that modulate the differentiation of neighboring epithelial cells. Here, we used cells with inducible expression of BF-2, combined with microarray analysis, to identify Placental Growth Factor (PIGF), a Vascular Endothelial Growth Factor (VEGF) family member previously implicated in angiogenesis, as a downstream target of BF-2. BF-2 binds to a conserved HNF3β site in the PIGF promoter and activates transcription. PIGF is precisely coexpressed with BF-2, both temporally and spatially, within the developing renal stroma, and it is completely absent in BF-2 null kidney stroma. Addition of PIGF to in vitro kidney organ cultures stimulates branching of the ureteric bud. Our observations indicate that PIGF is a direct and physiologically relevant transcriptional target of BF-2. The contribution of PIGF toward stromal signals that regulate epithelial differentiation suggests novel functions for a growth factor previously implicated in reactive angiogenesis.

Original languageEnglish (US)
Pages (from-to)1625-1629
Number of pages5
JournalCurrent Biology
Volume13
Issue number18
DOIs
StatePublished - Sep 16 2003

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ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)

Cite this

Zhang, H., Palmer, R., Gao, X., Kreidberg, J., Gerald, W., Hsiao, L., Jensen, R. V., Gullans, S. R., & Haber, D. A. (2003). Transcriptional activation of placental growth factor by the forkhead/winged helix transcription factor FoxD1. Current Biology, 13(18), 1625-1629. https://doi.org/10.1016/j.cub.2003.08.054