AIM:To investigate the role of reactive oxygen species( ROS) in the regulation of intracellular Ca~(2+)induced by angiotensin Ⅱ( Ang Ⅱ) in the primarily cultured medullary neurons.METHODS:Primarily cultured medullary neurons were prepared from 14-day-old embryos of Sprague-Dawley rats in the study.The identification of medullary neurons was assessed by double-labeling immunofluorescence.To explore the role of ROS,mainly the superoxide( O_2~-·),the O_2~-·generation was measured using the fluorogenic probe di...