after incubating fetal bovine aortic endothelial cells with 10 % retinal extract ( re ) for 24 hr , 6.5 ng of 6-kpgf/10 ( 5 ) cells were released compared to 0.8 ng of 6kpgf/10 ( 5 ) cells for unstimulated endothelium .
C0014257
endothelial
C0225336
cells