Angiotensin-converting enzyme 2 (ACE2) is an enzyme that is cardioprotective and renoprotective. Resorcinolnaphthalein increases the activity of ACE2 in vitro (EC50 = 19.5 μM).1 Activation of ACE2 in rats produces a decrease in blood pressure and improvement in cardiac function. In spontaneously hypertensive rats it produces a reversal of myocardial, perivascular, and renal fibrosis.
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Prada, J.A.H., Ferreira, A.J., Katovich, M.J., et al. Structure-based identification of small-molecule angiotensin-converting enzyme 2 activators as novel antihypertensive agents. Hypertension511312-1317(2008).