Effect of angiotensin Ⅱ type 1 receptor on delayed rectifier potassium current in catecholaminergic
AIM: To study the modulatory effects of angiotensin Ⅱ(Ang Ⅱ) on the delayed rectifier potassium (Kv) current (IKv) and its underlying intracellular mechanism in the catecholaminergic system of rats. METHODS: AT1 and AT2 receptors of the differentiated and undifferentiated CATH.a cells were determined by radioligands binding assay. The IKv was recorded with the whole cell patch-clamp configuration in voltage clamp mode on CATH.a cells. RESULTS： The AngⅡ receptor proteins including AT1 and AT2 receptors were expressed in CATH.a cells, and the number of the former was significantly more than the latter (P
