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UQ Centre for Cardiac and Vascular Biology Publications


Tmem2 regulates Vegf by controlling hyaluronic acid

Tmem2 regulates Vegf by controlling hyaluronic acid



Angiogenesis is responsible for tissue vascularization during development, as well as in pathological contexts, including cancer and ischemia. Vascular endothelial growth factors (VEGFs) regulate angiogenesis by acting through VEGF receptors to induce endothelial cell signaling. VEGF is processed in the extracellular matrix (ECM), but the complexity of ECM control of VEGF signaling and angiogenesis remains far from understood. In a forward genetic screen, we identified angiogenesis defects in tmem2 zebrafish mutants that lack both arterial and venous Vegf/Vegfr/Erk signaling. Strikingly, tmem2 mutants display increased hyaluronic acid (HA) surrounding developing vessels. Angiogenesis in tmem2 mutants was rescued, or restored after failed sprouting, by degrading this increased HA. Furthermore, oligomerized HA or overexpression of Vegfc rescued angiogenesis in tmem2 mutants. Based on these data, and the known structure of Tmem2, we find that Tmem2 regulates HA turnover to promote normal Vegf signaling during developmental angiogenesis.

De Angelis JE*, Lagendijk AK*, Chen H, Tromp A, Bower NI, Tunny KA, Brooks AJ, Bakkers J, Francois M, Yap AS, Wicking C, Hogan BM#, Smith KA#.

Tmem2 regulates embryonic Vegf-signaling by controlling Hyaluronic acid turnover.

Developmental Cell 2017. Jan 23 Volume 40, Issue 2, p123–136. *Joint first authors #Joint senior authors.

Crown Copyright © 2017. Published by Elsevier Inc. All rights reserved.