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- W1991505890 abstract "Statins have recently been shown to produce anti-cardiac hypertrophic effects via the regulation of small GTPases. However, the effects of statins on G protein-mediated cardiac hypertrophy, which is the main pathway of cardiac hypertrophy, have not yet been studied. We sought to evaluate whether statin treatment directly suppresses cardiac hypertrophy through a large G protein-coupled pathway regardless of the regulation of small GTPases. Using neonatal rat cardiomyocytes, we evaluated norepinephrine-induced cardiac hypertrophy for suppressibility of rosuvastatin and the pathways involved by analyzing total protein/DNA content, cell surface area, immunoblotting and RT-PCR for the signal transduction molecule. In a concentration-dependent manner, rosuvastatin inhibited total protein synthesis and downregulated basal and norepinephrine-induced expressions of myosin light chain2 and the c-fos proto-oncogene in cardiomyocytes. Treatment with norepinephrine induced cardiac hypertrophy accompanied by G(h) expression and membrane translocation. Rosuvastatin inhibited G(h) protein activity in cardiomyocytes by inhibiting basal and norepinephrine-stimulated mRNA transcription, protein expression and membrane translocation; however, norepinephrine-stimulated G(q) protein expression was not inhibited. In addition, the norepinephrine-stimulated protein kinase C (PKC)-mitogen-activated protein kinase (MEK 1,2)-extracellular signal-regulated kinases (ERKs) signaling cascade was inhibited by pretreatment with rosuvastatin. Rosuvastatin treatment also helped maintain expression levels of SERCA2a and intracellular calcium concentration. G(h) protein is a novel target of statins in myocardial hypertrophy, and statin treatment may directly suppress cardiac hypertrophy through a large G(h) protein-coupled pathway regardless of the regulation of small GTPases." @default.
- W1991505890 created "2016-06-24" @default.
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- W1991505890 date "2010-02-01" @default.
- W1991505890 modified "2023-10-07" @default.
- W1991505890 title "Rosuvastatin inhibits norepinephrine-induced cardiac hypertrophy via suppression of Gh" @default.
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- W1991505890 doi "https://doi.org/10.1016/j.ejphar.2009.10.050" @default.
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