β-adrenergic receptor desensitization in cardiac hypertrophy and heart failure

1999 ◽  
Vol 31 (3) ◽  
pp. 321-329 ◽  
Author(s):  
Dong-Ju Choi ◽  
Howard A. Rockman
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Adrenergic Receptor ◽  
Receptor Desensitization

scholarly journals Mechanism of β-Adrenergic Receptor Desensitization in Cardiac Hypertrophy Is Increased β-Adrenergic Receptor Kinase

1997 ◽  
Vol 272 (27) ◽  
pp. 17223-17229 ◽  
Author(s):  
Dong-Ju Choi ◽  
Walter J. Koch ◽  
John J. Hunter ◽  
Howard A. Rockman
Keyword(s):  
Cardiac Hypertrophy ◽  
Adrenergic Receptor ◽  
Receptor Desensitization ◽  
Receptor Kinase

Mechanisms of ?-adrenergic receptor desensitization: from molecular biology to heart failure

1996 ◽  
Vol 91 (S1) ◽  
pp. 29-34 ◽  
Author(s):  
M. J. Lohse ◽  
S. Engelhardt ◽  
S. Danner ◽  
M. B�hm
Keyword(s):  
Heart Failure ◽  
Molecular Biology ◽  
Adrenergic Receptor ◽  
Receptor Desensitization

scholarly journals Betulinic Acid Protects DOX-Triggered Cardiomyocyte Hypertrophy Response through the GATA-4/Calcineurin/NFAT Pathway

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 53
Author(s):  
Jung Joo Yoon ◽  
Chan Ok Son ◽  
Hye Yoom Kim ◽  
Byung Hyuk Han ◽  
Yun Jung Lee ◽  
...  
Keyword(s):  
Heart Failure ◽  
Cardiac Hypertrophy ◽  
Natriuretic Peptide ◽  
Betulinic Acid ◽  
Cardiomyocyte Hypertrophy ◽  
Ros Generation ◽  
H9c2 Cells ◽  
Myosin Light Chain 2 ◽  
Cardiovascular Morbidity And Mortality

Cardiac hypertrophy is a major risk factor for heart failure and leads to cardiovascular morbidity and mortality. Doxorubicin (DOX) is regarded as one of the most potent anthracycline antibiotic agents; however, its clinical usage has some limitations because it has serious cardiotoxic side effects such as dilated cardiomyopathy and congestive heart failure. Betulinic acid (BA) is a pentacyclic-cyclic lupane-type triterpene that has been reported to have anti-bacterial, anti-inflammatory, anti-vascular neogenesis, and anti-fibrotic effects. However, there is no study about its direct effect on DOX induced cardiac hypertrophy and apoptosis. The present study aims to investigate the effect of BA on DOX-induced cardiomyocyte hypertrophy and apoptosis in vitro in H9c2 cells. The H9c2 cells were stimulated with DOX (1 µM) in the presence or absence of BA (0.1–1 μM) and incubated for 24 h. The results of the present study indicated that DOX induces the increase cell surface area and the upregulation of hypertrophy markers including atrial natriuretic peptide (ANP), B-type natriuretic peptide (BNP), beta-myosin heavy chain (β-MHC), and Myosin Light Chain-2 (MLC2) in H9c2 cells. However, the pathological hypertrophic responses were downregulated after BA treatment. Moreover, phosphorylation of JNK, ERK, and p38 in DOX treated H9c2 cells was blocked by BA. As a result of measuring the change in ROS generation using DCF-DA, BA significantly inhibited DOX-induced the production of intracellular reactive oxygen species (ROS) when BA was treated at a concentration of over 0.1 µM. DOX-induced activation of GATA-4 and calcineurin/NFAT-3 signaling pathway were remarkably improved by pre-treating of BA to H9c2 cells. In addition, BA treatment significantly reduced DOX-induced cell apoptosis and protein expression levels of Bax and cleaved caspase-3/-9, while the expression of Bcl-2 was increased by BA. Therefore, BA can be a potential treatment for cardiomyocyte hypertrophy and apoptosis that lead to sudden heart failure.

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