Abstract
Bis(2,3-dibromo-4,5-dihydroxybenzyl) ether (BDDE) is a bromophenol compound derived from marine algae. Our previous reports have shown that BDDE possessed anticancer activity in vitro. However, its antiangiogenesis activity and possible mechanisms remain unclear. The present study demonstrated that BDDE displayed in vitro antiangiogenesis capabilities by significantly inhibiting HUVEC cells proliferation, migration, and tube formation, without any effect on the preformed vascular tube. Western blot analysis revealed that BDDE decreased the protein level of VEGF and VEGFR but not that of EGFR, FGFR, and IGFR. In addition, BDDE inactivated the VEGF downstream signaling molecules including mTOR and Src, whereas activated Akt and ERK. Moreover, BDDE blocked subintestinal vessel formation in zebrafish embryos in vivo and showed toxicity under high concentrations of BDDE. The results of this present study indicated that BDDE, which has unique chemical structure different from current antiangiogenesis agents, could be used as a potential drug candidate for cancer prevention and therapy.
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