The basic helix-loop-helix transcription factor, dHAND, is required for vascular development

Hiroyuki Yamagishi, Eric N. Olson, Deepak Srivastava

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

Reciprocal interactions between vascular endothelial cells and vascular mesenchymal cells are essential for angiogenesis. Here we show that the basic helix-loop-helix transcription factor, dHAND/Hand2, is expressed in the developing vascular mesenchyme and its derivative, vascular smooth muscle cells (VSMCs). Targeted deletion of the dHAND gene in mice revealed severe defects of embryonic and yolk sac vascular development by embryonic day 9.5. Vascular endothelial cells expressed most markers of differentiation. Vascular mesenchymal cells migrated appropriately but failed to make contact with vascular endothelial cells and did not differentiate into VSMCs. In a screen for genes whose expression was dependent upon dHAND (using subtractive hybridization comparing wild-type and dHAND-null hearts), the VEGF165 receptor, neuropilin-1, was found to be downregulated in dHAND mutants. These results suggest that dHAND is required for vascular development and regulates angiogenesis, possibly through a VEGF signaling pathway.

Original languageEnglish
Pages (from-to)261-270
Number of pages10
JournalJournal of Clinical Investigation
Volume105
Issue number3
DOIs
Publication statusPublished - 2000 Feb

ASJC Scopus subject areas

  • Medicine(all)

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