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Evolutionary Differences in the Vegf/Vegfr Code Reveal Organotypic Roles for the Endothelial Cell Receptor Kdr in Developmental Lymphangiogenesis.
Cell Reports ( IF 7.5 ) Pub Date : 2019-08-20 , DOI: 10.1016/j.celrep.2019.07.055
Adam J Vogrin 1 , Neil I Bower 2 , Menachem J Gunzburg 3 , Sally Roufail 1 , Kazuhide S Okuda 2 , Scott Paterson 2 , Stephen J Headey 3 , Steven A Stacker 4 , Benjamin M Hogan 2 , Marc G Achen 4
Affiliation  

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.

中文翻译:

Vegf / Vegfr代码中的进化差异揭示了内皮细胞受体Kdr在发育性淋巴管生成中的器官型作用。

淋巴管的发育建立了胚胎和成年组织液的平衡,并在疾病中不可或缺。在各种脊椎动物器官中,淋巴管显示器官型功能并以器官特异性方式发育。在所有情况下,发展性淋巴管生成均被认为是由血管内皮生长因子(VEGF)受体3(VEGFR3)驱动的,而VEGFR2的作用尚待充分探讨。在这里,我们在受体结合研究中定义了斑马鱼的Vegf / Vegfr代码。我们发现,虽然Vegfd指导颅面淋巴管生成,但它与Kdr(VEGFR2同源物)结合,但令人惊讶的是,与哺乳动物不同,它不结合Flt4(VEGFR3)。对kdr突变体进行的上位性分析和表征证实了受体结合分析,表明Kdr对于延髓颅面淋巴管生成是必不可少的,但不存在以Flt4为中心的尾主干淋巴管生成。我们进一步证明了Kdr在诱导淋巴管内皮细胞命运中的出乎意料但必不可少的作用。这项工作揭示了Vegf / Vegfr代码中的进化差异,揭示了发育淋巴管生成的空间受限机制。
更新日期:2019-08-20
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