Association of atherosclerosis and cardiac cell dysfunction
Yonemochi, H.; Nakagawa, M.; Iwao, T.; Ito, M.
Rinsho Byori. Japanese Journal of Clinical Pathology 44(11): 1037-1042
1996
ISSN/ISBN: 0047-1860 PMID: 8953933 Document Number: 456386
It is recognized that heart failure in patients with atherosclerotic lesion is the result of ischemia. However, there may also be cardiac cell dysfunction independent of ischemia, as factors advancing both of atherosclerosis and heart failure are discovered. The renin-angiotensin system is one of factor and angiotensin-converting enzyme inhibitor (ACEi) prevents progression of atherosclerotic lesion and heart failure. To elucidate the association of atherosclerosis and cardiac cell dysfunction, we investigated the effects of ACEi on cultured cardiac myocytes. Captopril increased beta-receptor density of myocytes and augmented the response to isoproterenol. CV-3480, a ACEi, also up-regulated beta-receptors but angiotensin I, angiotensin II and angiotensin type I receptor antagonist did not. Bradykinin B2 receptor blocker, HOE140, suppressed the effect of captopril on cultured cells. The results suggest that ACEi up-regulated beta-receptors and augmented the response to beta-receptor agonist through BK potentiation.