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논문 기본 정보

자료유형
학술저널
저자정보
Kang, Lan (Institute of Cardiology, The First Affiliated Hospotal, College of Medocome. Zjejiamg University) Fang, Qiang (Institute of Intensive Care Unit, The First Affiliated Hospital, College of Medicine, Zhejiang University) Hu, Shen-Jiang (Institute of Cardiology, The First Affiliated Hospotal, College of Medocome. Zjejiamg University)
저널정보
대한약학회 Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea Archives of pharmacal research : a publication of the Pharmaceutical Society of Korea 제30권 제5호
발행연도
2007.1
수록면
596 - 602 (7page)

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Abnormal intracellular Ca$^{2+}$ homeostasis in the myocardium has been suggested as the cause of cardiac hypertrophy, and this process can be prevented by the HMG-CoA reductase inhibitors, statins. In the present study, the effect of atorvastatin on left ventricular hypertrophy was investigated, and then whether the underlying mechanism was related to a defect in intracellu-lar Ca$^{2+}$ homeostasis explored. Twelve spontaneously hypertensive rats (SHR), at 8 weeks old, were used in this study, and received either distilled water or atorvastatin for ten weeks, with age-matched normotensive Wistar-Kyoto rats (WKY) used as controls. RT-PCR and western blotting were used to detect the mRNA and protein expressions of phospholamban (PLB) and sarcoplasmic reticulum Ca$^{2+}$-ATPase (SERCA2a), respectively, and a colorimetric method used to examine the SERCA2a activity. Additionally, cardiac hypertrophic indices, such as the cardiosomatic ratio, left ventricular weight to body weight (IWV/BW) ratio and cardiomyocytes transverse diameter (TDM), together with the systolic blood pressure (SBP) and serum lipidslevels were also examined. After ten weeks, significant decreases were observed in both them RNA and protein expression levels of SERCA2a, as well as its activity, in the hypertrophied hearts of the SHR. The administration of atorvastatin to the same strains of rats effectively inhibited these decreases, and the above cardiac hypertrophic indices, as well as the SBP and serum lipids levels were significantly decreased. However, no significant changes in the expressions of PLB were observed in WKY, SHR and atorvastatin-treated SHR. These findings demonstrated that through regulation of the PLB and SERCA2a levels in the hearts of SHR atorvastatin can prevent the cardiac hypertrophy caused due to pressure overload, which provides a relatively new insight into the mechanism of atorvastatin in the prevention of cardiac hypertrophy.

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