Conversely , a German study done in vivo found that VEGF concentrations actually decreased after a 25 % reduction in oxygen intake for 30 minutes .
The expression of angiopoietin - 2 in the absence of VEGF leads to endothelial cell death and vascular regression .
A German study done in vivo found that VEGF concentrations actually decreased after a 25 % reduction in oxygen intake for 30 minutes .
The expression of angiopoietin - 2 in the absence of VEGF leads to endothelial cell death and vascular regression .