Angiotensin II facilitates the potassium-evoked release of 3H-noradrenaline from the rabbit hypothalamus.

Antiotensin II facilitated in a concentration-dependent manner the potassium-evoked 3H-noradrenaline over-flow from the rabbit hypothalamus. This effect which is probably mediated through presynaptic angiotensin facilitatory receptors on noradrenergic nerve terminals was blocked by the specific angiotensin receptor antagonist, saralasin. These results demonstrate that angiotensin II also facilitates the stimulation-evoked release of noradrenaline in the central nervous system.