Circulation journal : official journal of the Japanese Circulation Society · 2007
Predominant effect of A-type natriuretic peptide on reduction of oxidative stress during the treatment of patients with heart failure.
Клиническое исследованиеСравнительное исследованиеСтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Shono Makoto, Yoshimura Michihiro, Nakayama Masafumi, Yamamuro Megumi, Abe Koji, Suzuki Satoru, Mizuno Yuji, Sugiyama Seigo, Saito Yoshihiko, Nakao Kazuwa, Yasue Hirofumi, Ogawa Hisao
Аннотация
BACKGROUND: Oxidative stress plays an important role in the pathogenesis of heart failure and was investigated in the present study of the role of exogenous A-type natriuretic peptide (ANP) in the patients with heart failure and in cultured neonatal rat cardiomyocytes.
METHODS AND RESULTS: The first protocol was to examine if an infusion of human ANP (carperitide) changed serum levels of TRX (thioredoxin) during the treatment of patients with heart failure compared with conventional therapy using furosemide. Protocol 2 investigated whether ANP had a direct antioxidant action on the failing heart by measuring TRX gene expression and reactive oxygen species (ROS) production in cultured neonatal rat cardiomyocytes. In Protocol 1, 8 patients were treated with only an intravenous bolus of furosemide and 11 patients with only an intravenous infusion of carperitide for 24 h. Serum TRX levels significantly decreased at 4 h (p<0.03) and at 24 h (p<0.05) in the carperitide group, whereas they decreased slightly but were not significantly different in the furosemide group. In Protocol 2, it was found that a low dose of exogenous ANP of 10(-9) mol/L significantly suppressed TRX expression and ROS production in cardiomyocytes.
CONCLUSION: Carperitide infusion has a predominantly antioxidant action, in addition to improving the hemodynamics of patients with acute heart failure. Furthermore, carperitide infusion should have a direct antioxidant effect on the failing heart.
METHODS AND RESULTS: The first protocol was to examine if an infusion of human ANP (carperitide) changed serum levels of TRX (thioredoxin) during the treatment of patients with heart failure compared with conventional therapy using furosemide. Protocol 2 investigated whether ANP had a direct antioxidant action on the failing heart by measuring TRX gene expression and reactive oxygen species (ROS) production in cultured neonatal rat cardiomyocytes. In Protocol 1, 8 patients were treated with only an intravenous bolus of furosemide and 11 patients with only an intravenous infusion of carperitide for 24 h. Serum TRX levels significantly decreased at 4 h (p<0.03) and at 24 h (p<0.05) in the carperitide group, whereas they decreased slightly but were not significantly different in the furosemide group. In Protocol 2, it was found that a low dose of exogenous ANP of 10(-9) mol/L significantly suppressed TRX expression and ROS production in cardiomyocytes.
CONCLUSION: Carperitide infusion has a predominantly antioxidant action, in addition to improving the hemodynamics of patients with acute heart failure. Furthermore, carperitide infusion should have a direct antioxidant effect on the failing heart.