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Tetrandrine blocks cardiac hypertrophy by disrupting reactive oxygen species-dependent ERK1/2 signalling.
- Source :
- British Journal of Pharmacology; Feb2010, Vol. 159 Issue 4, p970-981, 12p
- Publication Year :
- 2010
-
Abstract
- <bold>Background and Purpose: </bold>Tetrandrine, a well-known naturally occurring calcium antagonist with anti-inflammatory, antioxidant and anti-fibrogenetic activities, has long been used clinically for treatment of cardiovascular diseases such as hypertension and arrhythmia. However, little is known about the effect of tetrandrine on cardiac hypertrophy. The aims of the present study were to determine whether tetrandrine could attenuate cardiac hypertrophy and to clarify the underlying molecular mechanisms.<bold>Experimental Approach: </bold>Tetrandrine (50 mg x kg(-1) x day(-1)) was administered by oral gavage three times a day for one week and then the mice were subjected to either chronic pressure overload generated by aortic banding (AB) or sham surgery (control group). Cardiac function was determined by echocardiography.<bold>Key Results: </bold>Tetrandrine attenuated the cardiac hypertrophy induced by AB, as assessed by heart weight/body weight and lung weight/body weight ratios, cardiac dilatation and the expression of genes of hypertrophic markers. Tetrandrine also inhibited fibrosis and attenuated the inflammatory response. The cardioprotective effects of tetrandrine were mediated by blocking the increased production of reactive oxygen species and the activation of ERK1/2-dependent nuclear factor-kappaB and nuclear factor of activated T cells that occur in response to hypertrophic stimuli.<bold>Conclusions and Implications: </bold>Taken together, our results suggest that tetrandrine can improve cardiac function and prevent the development of cardiac hypertrophy by suppressing the reactive oxygen species-dependent ERK1/2 signalling pathway. [ABSTRACT FROM AUTHOR]
- Subjects :
- CALCIUM antagonists
THERAPEUTICS
HEART diseases
CARDIAC hypertrophy
REACTIVE oxygen species
CELLULAR signal transduction
MITOGEN-activated protein kinases
TRANSCRIPTION factors
NF-kappa B
PROTEIN metabolism
ANIMAL experimentation
ANIMAL populations
ANTI-inflammatory agents
ANTIOXIDANTS
APOPTOSIS
BIOCHEMISTRY
BIOLOGICAL models
CARDIOTONIC agents
CELL culture
CELLS
COMPARATIVE studies
CONVALESCENCE
GENETIC techniques
HEART physiology
LEFT heart ventricle
HEART failure
ISOQUINOLINE
PHENOMENOLOGY
RESEARCH methodology
MEDICAL cooperation
MICE
ORAL drug administration
PHOSPHORYLATION
PROTEINS
RATS
RESEARCH
TIME
TRANSFERASES
ULTRASONIC imaging
DNA-binding proteins
EVALUATION research
FIBROSIS
DISEASE complications
PHARMACODYNAMICS
PREVENTION
Subjects
Details
- Language :
- English
- ISSN :
- 00071188
- Volume :
- 159
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- British Journal of Pharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 65012793
- Full Text :
- https://doi.org/10.1111/j.1476-5381.2009.00605.x