Abstract：
:Cardiac hypertrophy is a major cause of morbidity and mortality worldwide. Transforming growth factor-β1 (TGF-β1) signaling has been considered as a trigger causally contributing to pathological cardiac hypertrophy. Asiatic acid (AA) is a triterpenoid compound extracted from Centella asiatica and exhibits a variety of pharmacological effects. In this study, we investigated the anti-hypertrophic effects and mechanisms of action of AA in a TGF-β1-stimulated hypertrophic response using cultured neonatal cardiomyocytes in vitro and in a mouse model of cardiac hypertrophy induced by pressure overload in vivo. Treatment with AA markedly attenuated the TGF-β1-induced hypertrophic responses of cardiomyocytes as reflected by reduction in the cardiomyocyte surface area and the inhibition of atrial natriuretic peptide (ANP) mRNA expression. The protective effects of AA on hypertrophic cardiomyocytes were associated with the blocking of p38 and extracellular signal‑regulated kinase (ERK)1/2 phosphorylation and the reduction of nuclear factor-κB (NF-κB) binding activity. In vivo experiments indicated that the administration of AA prevented cardiac hypertrophy and dysfunction induced by pressure overload. It was found that AA markedly reduced the excessive production of TGF-β1 in the hypertrophic myocardium, blocked the phosphorylation of p38 and ERK1/2 and inhibited the activation of NF-κB. Our data suggest that AA may be a novel therapeutic agent for cardiac hypertrophy. The inhibition of TGF-β1‑mediated hypertrophic signaling may be the mechanism through which AA prevents cardiac hypertrophy.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Si L,Xu J,Yi C,Xu X,Wang F,Gu W,Zhang Y,Wang Xdoi
10.3892/ijmm.2014.1781subject
Has Abstractpub_date
2014-08-01 00:00:00pages
499-506issue
2eissn
1107-3756issn
1791-244Xjournal_volume
34pub_type
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