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Interaction between cyclooxygenase and the renin-angiotensin-aldosterone system: rationale and clinical relevanceDepartment of Cardiology, Cochin Hospital, Rene Descartes University, Paris, France
Department of Internal Medicine, Georges Pompidou European Hospital, Paris, France
Department of Internal Medicine, Lariboisière Hospital, Paris, France
Department of Cardiology, Cochin Hospital, Rene Descartes University, Paris, France, christian.spaulding{at}cch.ap-hop-paris.fr Increased understanding of pathophysiological mechanisms of cardiovascular diseases has shown that the renin-angiotensin-aldosterone system (RAAS) is activated in this setting and suggests a central role for the angiotensin-converting enzyme (ACE). ACE transforms angiotensin I (Ang I) to angiotensin II (Ang II), and also promotes the degradation of bradykinin into inactive metabolites. These bradykinins stimulate nitric oxide synthesis and vasodilatator prostaglandin synthesis via a cyclooxygenase (COX) pathway. COX inhibitors may therefore be deleterious in cardiovascular disease and/or counteract part of ACE inhibitor (ACE-I) efficacy. This has been clearly demonstrated with non-steroidal anti-inflammatory drugs (NSAIDs), including high-dose aspirin, in avoiding their use in such patients. hypertension, coronary artery disease and chronic heart failure (CHF); most guidelines recommend avoiding their use in such patients. Theoretically, this effect is dose-mediated and the existence of an identical deleterious effect with low-dose aspirin has been an area of intense debate. In this article, we review studies, most of them conducted in CHF, that pointed out such a possible deleterious effect and a counteraction of ACE-Is with low-dose aspirin , using various criteria of assessment. However, there are no prospective long-term studies that have validated such an effect, and the role of other anti-aggregating agents has not been evaluated. Until such studies are published, the use of low-dose aspirin (100 mg/day) in such patients can be recommended.
Key Words: angiotensin II angiotensin-converting enzyme aspirin heart failure
Journal of Renin-Angiotensin-Aldosterone System, Vol. 4, No. 3,
149-154 (2003) This article has been cited by other articles:
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