title: Converting enzyme inhibitors regressed cardiac hypertrophy and reduced tissue angiotensin II in spontaneously hypertensive rats.
abstract: To examine the role of the tissue renin-angiotensin system in left ventricular hypertrophy, converting enzyme inhibitors were administered orally to 12-week-old male spontaneously hypertensive rats (SHR) for 4 weeks, and cardiac tissue angiotensin II was measured. Treatment with enalapril (10 mg/kg per day) and trandolapril (1 mg/kg per day) lowered systolic blood pressure, left ventricular weight and left ventricular angiotensin II content. Plasma angiotensin II concentration was increased by the treatment with enalapril whereas trandolapril did not cause any change. There was significantly positive correlation between left ventricular weight and angiotensin II content. Because angiotensin II promotes cell proliferation, these results suggest that cardiac tissue angiotensin II, rather than circulating angiotensin II, may account for the pathophysiology of left ventricular hypertrophy in SHR.
authors.affiliation: Department of Geriatric Medicine, Osaka University Medical School, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Nagano
authors.forename: J
authors.initials: J
authors.lastname: Higaki
authors.forename: H
authors.initials: H
authors.lastname: Mikami
authors.forename: M
authors.initials: M
authors.lastname: Nakamaru
authors.forename: K
authors.initials: K
authors.lastname: Higashimori
authors.forename: K
authors.initials: K
authors.lastname: Katahira
authors.forename: Y
authors.initials: Y
authors.lastname: Tabuchi
authors.forename: A
authors.initials: A
authors.lastname: Moriguchi
authors.forename: F
authors.initials: F
authors.lastname: Nakamura
authors.forename: T
authors.initials: T
authors.lastname: Ogihara
mesh_terms: D000804:Angiotensin II / Q000378:metabolism*; D000806:Angiotensin-Converting Enzyme Inhibitors / Q000494:pharmacology*; D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D006332:Cardiomegaly / Q000188:drug therapy* / Q000503:physiopathology; D004656:Enalapril / Q000494:pharmacology*; D006325:Heart Atria / Q000473:pathology; D006352:Heart Ventricles / Q000473:pathology; D007211:Indoles / Q000494:pharmacology*; D008297:Male; D009206:Myocardium / Q000378:metabolism / Q000473:pathology; D009929:Organ Size / Q000187:drug effects; D051381:Rats; D011918:Rats, Inbred SHR; D012084:Renin-Angiotensin System / Q000187:drug effects / Q000502:physiology
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D007211:Indoles; D000804:Angiotensin II; C052035:trandolapril; D004656:Enalapril