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Involvement of the kallikrein‐kinin system in the antihypertensive effect of the angiotensin converting enzyme inhibitors.
Author(s) -
Waeber B,
JuilleratJeanneret L,
Aubert JF,
Schapira M,
Nussberger J,
Brunner HR
Publication year - 1989
Publication title -
british journal of clinical pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.216
H-Index - 146
eISSN - 1365-2125
pISSN - 0306-5251
DOI - 10.1111/j.1365-2125.1989.tb03479.x
Subject(s) - bradykinin , angiotensin converting enzyme , kallikrein , captopril , bradykinin receptor , kinin , endocrinology , chemistry , medicine , renin–angiotensin system , enzyme inhibitor , ace inhibitor , vasodilation , carboxypeptidase , enzyme , pharmacology , blood pressure , biochemistry , receptor
1. Studies were performed in normal subjects and in rats to assess the effect of angiotensin converting enzyme (ACE) inhibition on the kallikrein‐kinin system. As ACE is identical to kininase II, one of the enzymes physiologically involved in bradykinin degradation, bradykinin may be expected to accumulate during ACE inhibition. 2. A competitive antagonist of bradykinin was used to explore in unanaesthetized rats the contribution of circulating bradykinin to blood pressure control under ACE inhibition. 3. No evidence was found for a role of this vasodilating peptide in the blood pressure lowering effect of acute ACE inhibition. 4. The plasma activity of carboxypeptidase N (= kininase I), another pathway of bradykinin degradation, remained intact during a 1 week course of treatment with an ACE inhibitor in normal subjects. This therefore indicates that bradykinin formed during ACE inhibition can still be metabolized.