To investigate the role of wnk1 in tumor-induced angiogenesis, Tg (fli1:EGFP) embryos at 1-cell stage were injected with morpholino (MO) antisense oligonucleotides, followed by injection of Hep3B_Lifeact-RFP cells at 2 dpf, and analyzed between 0 and 3 dpi. The gene discussed is FLI1; the disease is neoplasm.