摘要
Objective To explore the effect of atorvastatin on cardiac hypertrophy and to determine the potential mechanism involved. Methods An in vitro cardiomyocyte hypertrophy from neonatal rats was induced with angiotensinⅡ(Ang Ⅱ) stimulation. Before AngⅡ stimulation, the cultured rat cardiac myocytes were pretreated with atorvastatin at different concentrations(0.1, 1, and 10 μmol/L). The following parameters were evaluated: the myocyte surface area, 3H-leucine incorporation into myocytes, m RNA expressions of atrial natriuretic peptide, brain natriuretic peptide, matrix metalloproteinase 9, matrix metalloproteinase 2, and interleukin-1β, m RNA and protein expressions of the δ/β peroxisome proliferator-activated receptor(PPAR) subtypes. Results It was shown that atorvastatin could ameliorate Ang Ⅱ-induced neonatal cardiomyocyte hypertrophy in the area of cardiomyocytes, 3H-leucine incorporation, and the expression of atrial natriuretic peptide and brain natriuretic peptide markedly. Meanwhile, atorvastatin also inhibited the augmented m RNA level of several cytokines in hypertrophic myocytes. Furthermore, the down-regulated expression of PPAR-δ/β at both the m RNA and protein levels in hypertrophic myocytes could be significantly reversed by atorvastatin treatment. Conclusions Atorvastatin could improve AngⅡ-induced cardiac hypertrophy and inhibit the expression of cytokines. Such effect might be partly achieved through activation of the PPAR-δ/β pathway.
Objective To explore the effect of atorvastatin on cardiac hypertrophy and to determine the potential mechanism involved. Methods Anin vitro cardiomyocyte hypertrophy from neonatal rats was induced with angiotensinⅡ (AngⅡ) stimulation. Before AngⅡ stimulation, the cultured rat cardiac myocytes were pretreated with atorvastatin at different concentrations (0.1, 1, and 10μmol/L). The following parameters were evaluated: the myocyte surface area,3H-leucine incorporation into myocytes, mRNA expressions of atrial natriuretic peptide, brain natriuretic peptide, matrix metalloproteinase 9, matrix metalloproteinase 2, and interleukin-1β, mRNA and protein expressions of theδ/β peroxisome proliferator-activated receptor (PPAR) subtypes. Results It was shown that atorvastatin could ameliorate AngⅡ-induced neonatal cardiomyocyte hypertrophy in the area of cardiomyocytes,3H-leucine incorporation, and the expression of atrial natriuretic peptide and brain natriuretic peptide markedly. Meanwhile, atorvastatin also inhibited the augmented mRNA level of several cytokines in hypertrophic myocytes. Furthermore, the down-regulated expression of PPAR-δ/β at both the mRNA and protein levels in hypertrophic myocytes could be significantly reversed by atorvastatin treatment. Conclusions Atorvastatin could improve AngⅡ-induced cardiac hypertrophy and inhibit the expression of cytokines. Such effect might be partly achieved through activation of the PPAR-δ/β pathway.
基金
Supported by the National Basic Research Program(973 Program)(2013CB530804)
