(A-H’) Confocal images of Tg(kdrl:GFP)
expression in wt, ets1−/−,
etv2−/−and
ets1−/−;
etv2−/−embryos at 34 hpf and 60 hpf using
4× and 10× objectives.
ets1−/−embryos display normal
vascular patterning (B-B’, F-F’), similar to wild type embryos
(A-A’,E-E’). ISVs begin to emerge in
etv2−/−embryos at ~34 hpf
(C’) but are absent in
ets1−/−;
etv2−/− double mutant embryos (D’).
At 60 hpf, ets1−/−;
etv2−/−embryos have fewer ISVs and less
recovery in axial vasculature than
etv2−/− embryos (G-H’).
(I-J) Quantitative analysis of total number of ISVs and ISV height at 60 hpf.
Note the reduction in number of ISVs (I) and full sprouts (J) in
ets1−/−;
etv2−/−compared to
etv2−/− embryos.
*P<0.05, ** P <0.01; n.s
– not significant. Horizontal bars within violin plots represent median.
Arrowheads indicate mis-patterned and stunted ISVs.