Association between beta3-adrenergic receptor and oxidative stress in chronic heart failure rats / 中华心血管病杂志

ABSTRACT

<p><b>OBJECTIVE</b>To investigate the association between beta(3)-adrenergic receptor (beta(3)-AR) and oxidative stress in isoproterenol (ISO)-induced chronic heart failure (HF) rats.</p><p><b>METHODS</b>Seven weight-matched normal adult rats (control), 18 ISO induced heart failure rats and 21 ISO induced heart failure rats treated with specific beta(3)-AR inhibitor, SR59230A for 6 weeks were included in this study. Echocardiography was performed at the end of the study and the myocardial levels of total superoxide dismutase (T-SOD) and lipid peroxidation (LPO) were measured by colorimetry, myocardial expression of beta(3)-AR was detected by reverse transcription-polymerase chain reaction (RT-PCR).</p><p><b>RESULT</b>Compared with control group, the cardiac function was significantly reduced and myocardial beta(3)-AR mRNA expression was significantly increased, LPO level was also significantly enhanced while T-SOD level was significantly reduced in ISO group and these changes could be significantly attenuated by treatment with SR59230A.</p><p><b>CONCLUSION</b>Our results showed that myocardial upregulation of beta(3)-AR is associated with increased oxidative stress in this model and beta(3)-AR inhibitor may be a new therapeutic agent for heart failure treatment.</p>