title: Long-lasting inhibition of angiotensin response in rats by depot administration of octanoyl-[Leu8]-angiotensin II.
abstract: Depot administration of a lipophilic angiotensin II (AII) antagonist was tested for obtaining prolonged inhibition of the pressor response to AII in rats. Intramuscular injections of 1.5 or 5.0 mg of octanoyl-[Leu8]AII (oct-LAII), in oil solution produced the same degree of AII inhibition either 6 h or 24 h after the injection. The inhibition was comparable to that expected from the continuous intravenous infusion of oct-LAII at the rate of 1.2 microgram kg-1 min-1. The prolonged effect of intramuscular injections of oct-LAII in oil solution may be useful for chronic studies of physiopathological states involving the renin-angiotensin-aldosterone system.
mesh_terms: D000804:Angiotensin II / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors / Q000494:pharmacology; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D003692:Delayed-Action Preparations; D008297:Male; D051381:Rats; D013997:Time Factors
chemical_list: D003692:Delayed-Action Preparations; D000804:Angiotensin II