title: Effects of sodium loading on antihypertensive responses to an angiotensin-converting enzyme inhibitor in spontaneously hypertensive and renal hypertensive rats.
abstract: Sodium loading significantly attenuated the antihypertensive potency of an angiotensin-converting enzyme inhibitor, SA446, in 2-kidney, 1-clip renal hypertensive rats, but the potency of SA446 remained unchanged in spontaneously hypertensive rats. Basal levels of plasma renin activity of both types of hypertensive rats were suppressed by sodium loading. From these results, it appeared that a different mechanism was involved in the maintenance of hypertension in 2-kidney, 1-clip renal hypertensive rats and in spontaneously hypertensive rats. It also appeared that the mechanism of the antihypertensive action of angiotensin-converting enzyme inhibitors was not explainable only by the suppression of the plasma renin-angiotensin system.
mesh_terms: D015097:3-Mercaptopropionic Acid / Q000031:analogs & derivatives / Q000494:pharmacology*; D000806:Angiotensin-Converting Enzyme Inhibitors; D000818:Animals; D000959:Antihypertensive Agents; D001794:Blood Pressure / Q000187:drug effects; D006973:Hypertension / Q000201:enzymology / Q000503:physiopathology*; D006977:Hypertension, Renal / Q000201:enzymology / Q000503:physiopathology*; D051381:Rats; D011918:Rats, Inbred SHR; D012083:Renin / Q000097:blood; D012964:Sodium / Q000494:pharmacology*; D013438:Sulfhydryl Compounds; D053778:Thiazolidines
chemical_list: D000806:Angiotensin-Converting Enzyme Inhibitors; D000959:Antihypertensive Agents; D013438:Sulfhydryl Compounds; D053778:Thiazolidines; D012964:Sodium; D015097:3-Mercaptopropionic Acid; C033437:rentiapril; D012083:Renin