• mice exhibit increased blood pressure compared with wild-type mice
• during the first 5 minutes after AT1 antagonist treatment, mice exhibit a greater decrease in blood pressure than similarly treated wild-type mice
• phentolamine-treated mice exhibit a greater decrease in blood pressure than similarly treated wild-type mice
• BQ-788-treated mice exhibit a decrease in blood pressure unlike in similarly treated wild-type mice
• RES-701-1-treated mice exhibit a greater increase in blood pressure than similarly treated wild-type mice
• sarafotoxin S6c-treated mice exhibit a greater increase in blood pressure than similarly treated wild-type mice
• however, acute adrenalectomy results in normal blood pressure compared with similarly treated wild-type mice