Receptors for VEGF, VEGFB and PGF have a tyrosine-protein kinase activity. The VEGF-kinase ligand/receptor signaling system plays a key role in vascular development and regulation of vascular permeability.
VEGF and its high-affinity binding receptors, the tyrosine kinases FLK1 and FLT1, are thought to be important for the development of embryonic vasculature. It has been shown that an alternately spliced form of FLT1 produces a soluble protein, termed sFLT1, which binds vascular endothelial growth factor with high affinity, playing an inhibitory role in angiogenesis.
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Shi J et al. Xiaotan Sanjie decoction inhibits angiogenesis in gastric cancer through Interleukin-8-linked regulation of the vascular endothelial growth factor pathway. J Ethnopharmacol189:230-7 (2016).
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