ZFIN ID: ZDB-FIG-120228-25
miR-221 Is Required for Vegfc/Flt4 Signaling (A–F) Confocal micrographs Tg(fli1a:egfp)y1 embryos at 27 hpf; arrowheads denote ISVs; lateral views, dorsal is up, anterior to the left. (A) Embryo injected with 6 ng control MO. (B) Embryo injected with 1 ng flt4 and 5 ng control MO. (C) Embryo injected with 1 ng control and 5 ng miR-221 MO. (D) Embryo injected with 1 ng flt4 MO and 5 ng miR-221 MO. (E) kdrlum19 mutant embryo injected with 10 ng control MO. (F) kdrlum19 mutant embryo injected with 10 ng of miR-221 MO. (G) Quantification of ISV length in wild-type or kdrlum19 mutant embryos injected with indicated MOs. Measurements were made of four adjacent ISVs per embryo in at least 18 embryos from three separate injections; -p < 0.001; N.S., not statistically different. (H–K) Tg(fli1a:egfp)y1 embryos injected with hsp70:vegfc-2A-mcherry transposable element and heat shocked at 15 ss. Red indicates Vegfc-2A-mcherry expression. Arrowheads indicate ectopic formation of vessels. Embryos at 33 hpf coinjected with (H) 10 ng control MO, (I) 2 ng flt4 MO, (J) 10 ng miR-221 MO, or (K) mutant for kdrlum19. (L) Proportion of hemisegments with ectopic vessel sprouts in embryos injected with 25 pg Tol2-hsp70:vegfc-2A-mcherry and 25 pg Tol2 transposase. Embryos were co-injected with indicated MO, or were mutant for the kdrlum19 allele as determined by genotyping following phenotypic analysis. -p < 0.02; N.S., not significant. Scale bars are (A–F) 50 µm and (H–K) 25 μm.
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Reprinted from Developmental Cell, 22(2), Nicoli, S., Knyphausen, C.P., Zhu, L.J., Lakshmanan, A., and Lawson, N.D., miR-221 Is Required for Endothelial Tip Cell Behaviors during Vascular Development, 418-429, Copyright
(2012) with permission from Elsevier.
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