<prompt> All of the following are mediators of acute inflammation except is -AngiotensinProstaglandin E2KallikreinC 3a  <response>: Basic Pathology, Robbins. Page no.: 45 Angiotensin is a peptide hormone that causes vasoconstriction and an increase in blood pressure. It is pa of the renin-angiotensin system, which regulates blood pressure. Angiotensin also stimulates the release of aldosterone from the adrenal coex to promote sodium retention by the kidneys. 