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XB-ART-44363
Blood 2010 Oct 28;11617:3356-66. doi: 10.1182/blood-2009-11-254557.
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Role of synectin in lymphatic development in zebrafish and frogs.

Hermans K , Claes F , Vandevelde W , Zheng W , Geudens I , Orsenigo F , De Smet F , Gjini E , Anthonis K , Ren B , Kerjaschki D , Autiero M , Ny A , Simons M , Dewerchin M , Schulte-Merker S , Dejana E , Alitalo K , Carmeliet P .


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The molecular basis of lymphangiogenesis remains incompletely characterized. Here, we document a novel role for the PDZ domain-containing scaffold protein synectin in lymphangiogenesis using genetic studies in zebrafish and tadpoles. In zebrafish, the thoracic duct arises from parachordal lymphangioblast cells, which in turn derive from secondary lymphangiogenic sprouts from the posterior cardinal vein. Morpholino knockdown of synectin in zebrafish impaired formation of the thoracic duct, due to selective defects in lymphangiogenic but not angiogenic sprouting. Synectin genetically interacted with Vegfr3 and neuropilin-2a in regulating lymphangiogenesis. Silencing of synectin in tadpoles caused lymphatic defects due to an underdevelopment and impaired migration of Prox-1(+) lymphatic endothelial cells. Molecular analysis further revealed that synectin regulated Sox18-induced expression of Prox-1 and vascular endothelial growth factor C-induced migration of lymphatic endothelial cells in vitro. These findings reveal a novel role for synectin in lymphatic development.

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Species referenced: Xenopus laevis
Genes referenced: flt4 gipc1 nrp1 sox18
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References [+] :
Bernard, Acquisition of SOX transcription factor specificity through protein-protein interaction, modulation of Wnt signalling and post-translational modification. 2010, Pubmed