Venous identity requires BMP signalling through ALK3

Alice Neal, Svanhild Nornes, Sophie Payne, Marsha D. Wallace, Martin Fritzsche, Pakavarin Louphrasitthiphol, Robert N. Wilkinson, Kira M. Chouliaras, Ke Liu, Karen Plant, Radhika Sholapurkar, Indrika Ratnayaka, Wiebke Herzog, Gareth Bond, Tim Chico, George Bou-Gharios and Sarah De Val ()
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Alice Neal: University of Oxford
Svanhild Nornes: University of Oxford
Sophie Payne: University of Oxford
Marsha D. Wallace: University of Oxford
Martin Fritzsche: University of Oxford
Pakavarin Louphrasitthiphol: University of Oxford
Robert N. Wilkinson: University of Sheffield
Kira M. Chouliaras: University of Oxford
Ke Liu: University of Liverpool
Karen Plant: University of Sheffield
Radhika Sholapurkar: University of Oxford
Indrika Ratnayaka: University of Oxford
Wiebke Herzog: University of Muenster
Gareth Bond: University of Oxford
Tim Chico: University of Sheffield
George Bou-Gharios: University of Liverpool
Sarah De Val: University of Oxford

Nature Communications, 2019, vol. 10, issue 1, 1-18

Abstract: Abstract Venous endothelial cells are molecularly and functionally distinct from their arterial counterparts. Although veins are often considered the default endothelial state, genetic manipulations can modulate both acquisition and loss of venous fate, suggesting that venous identity is the result of active transcriptional regulation. However, little is known about this process. Here we show that BMP signalling controls venous identity via the ALK3/BMPR1A receptor and SMAD1/SMAD5. Perturbations to TGF-β and BMP signalling in mice and zebrafish result in aberrant vein formation and loss of expression of the venous-specific gene Ephb4, with no effect on arterial identity. Analysis of a venous endothelium-specific enhancer for Ephb4 shows enriched binding of SMAD1/5 and a requirement for SMAD binding motifs. Further, our results demonstrate that BMP/SMAD-mediated Ephb4 expression requires the venous-enriched BMP type I receptor ALK3/BMPR1A. Together, our analysis demonstrates a requirement for BMP signalling in the establishment of Ephb4 expression and the venous vasculature.

Date: 2019
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DOI: 10.1038/s41467-019-08315-w

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