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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Pharmacological properties of FPL 63547, a novel inhibitor of angiotensin-converting enzyme.

1. FPL 63547, in its active diacid form, was a potent inhibitor of rabbit lung angiotension converting enzyme (ACE) in vitro (IC50 0.51 nM). 2. In conscious normotensive dogs, FPL 63547 (10-300 micrograms kg-1 i.v.) produced prolonged, dose-related inhibition of plasma ACE activity and angiotensin I pressor responses, without affecting basal blood pressure, heart rate or pressor responses to angiotensin II. 3. In anaesthetized dogs, FPL 63547 diacid (3-300 micrograms kg-1 i.v. cumulatively) produced dose-related increases in cardiac output accompanied by falls in total peripheral resistance indicative of vasodilatation. Mild stimulation of cardiac rate and contractility was also observed. Enalapril diacid had a similar profile. 4. FPL 63547 was a highly effective antihypertensive agent after oral administration to spontaneously hypertensive rats (SHR) pretreated with a diuretic. It lowered systolic blood pressure (SBP) on acute administration over the range 3 X 10(-7)-10(-5) mol kg-1 p.o. (congruent to 0.13-4.5 mg kg-1 p.o.). FPL 63547 was more potent than other ACE inhibitors tested, threshold active doses for lisinopril, enalapril and captopril being 10(-6), 10(-6) and 3 X 10(-5) mol kg-1 p.o., respectively. The antihypertensive effects of FPL 63547, unlike those of enalapril and captopril, were of long duration. 5. The antihypertensive efficacy of FPL 63547 was also observed following chronic oral administration. A dose of 0.5 mg kg-1 day-1 once daily for 23 days produced a sustained reduction of SBP. By the end of the treatment period, SBP was significantly lowered both pre- and post-dose, i.e. effective 24 h control had been achieved.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


  1. Pharmacological properties of FPL 63547, a novel inhibitor of angiotensin-converting enzyme. Carr, R.D., Higgs, L., Killingback, P.G., Nicol, A.K., O'Connor, S.E., Robson, A., Wells, E., Simpson, W.T. Br. J. Pharmacol. (1990) [Pubmed]
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