Abstract:
:Lymphatic vascular development establishes embryonic and adult tissue fluid balance and is integral in disease. In diverse vertebrate organs, lymphatic vessels display organotypic function and develop in an organ-specific manner. In all settings, developmental lymphangiogenesis is considered driven by vascular endothelial growth factor (VEGF) receptor-3 (VEGFR3), whereas a role for VEGFR2 remains to be fully explored. Here, we define the zebrafish Vegf/Vegfr code in receptor binding studies. We find that while Vegfd directs craniofacial lymphangiogenesis, it binds Kdr (a VEGFR2 homolog) but surprisingly, unlike in mammals, does not bind Flt4 (VEGFR3). Epistatic analyses and characterization of a kdr mutant confirm receptor-binding analyses, demonstrating that Kdr is indispensible for rostral craniofacial lymphangiogenesis, but not caudal trunk lymphangiogenesis, in which Flt4 is central. We further demonstrate an unexpected yet essential role for Kdr in inducing lymphatic endothelial cell fate. This work reveals evolutionary divergence in the Vegf/Vegfr code that uncovers spatially restricted mechanisms of developmental lymphangiogenesis.
journal_name
Cell Repjournal_title
Cell reportsauthors
Vogrin AJ,Bower NI,Gunzburg MJ,Roufail S,Okuda KS,Paterson S,Headey SJ,Stacker SA,Hogan BM,Achen MGdoi
10.1016/j.celrep.2019.07.055subject
Has Abstractpub_date
2019-08-20 00:00:00pages
2023-2036.e4issue
8issn
2211-1247pii
S2211-1247(19)30959-3journal_volume
28pub_type
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