Role of Oxygen Free Racical in the Proliferation of ECV304 Induced by AngⅡ / 昆明医科大学学报

ABSTRACT

Objective To explore the role of oxygen free radicals in the proliferation of ECV304 induced by AngⅡ.Methods The lines of human umbilical vein endothelial cell(ECV304)cultured in vivo were divided into three groups which were treated by AngⅡ,AngⅡ+N-acetyl-L-cysteine(NAC),and normal culture medium.First we observed the proliferous effect of ECV304 induced by AngⅡat different concentration with improved MTT and microscope.Then the contents of oxygen free radicals(?OH)in three groups were detected by spectrophotometer.Results ECV304 incubated with AngⅡ(0.03125～1?mol/L)for 12 hours increased the proliferation rate(P 0.05 vs.control group).Conclusions ECV304 induced by AngⅡcan produce oxygen free radicals(?OH),and the contents of oxygen free radicals(?OH) increase with the prolongation of time and the enlargement of dose;Antioxidant NAC can inhibit the proliferation of ECV304 induced by AngⅡ,this effect may be related with reducing the content of oxygen free radicals(?OH);oxygen free radicals(?OH)may be one of the major mocleculars which play an important role in the signal transduction of ECV304 proliferation.