Role of PPARα/PGC-1αin doxorubicin induced mouse dilated cardio-myopathy
10.3969/j.issn.1000-4718.2015.07.002
- VernacularTitle:PPARα／PGC-1α在阿霉素扩张型心肌病小鼠心肌组织中的表达及作用
- Author:
Xuesheng WANG
;
Yongyao YANG
;
Tianhe YANG
;
Qingan JIANG
- Publication Type:Journal Article
- Keywords:
Peroxisome proliferator-activated receptorsα;
Peroxisome proliferator activated receptor coactiva-tor 1α;
Doxorubicin;
Dilated cardiomyopathy;
Energy metabolism
- From:
Chinese Journal of Pathophysiology
2015;(7):1160-1165
- CountryChina
- Language:Chinese
-
Abstract:
[ ABSTRACT] AIM:To investigate the changes of peroxisome proliferator-activated receptors ( PPAR)α/peroxi-some proliferator activated receptor coactivator 1 alpha ( PGC-1α) in doxorubicin ( DOX) induced dilated cardiomyopathy ( DCM) and its effect on the energy metabolism and myocardial function in mice .METHODS:Forty mice were randomly divided into 4 groups:control group, DOX group, PPARαinhibitor group and PPARαagonist group.The DCM model was established by injection of DOX.The protein levels of PPARα/PGC-1αwere detected.The PPARαinhibitor and PPARαagonist were used 2 weeks beforeinjection of DOX.The contents of adenine acid and phosphocreatine ( Pcr) in the mito-chondria were measured by high-performance liquid chromatography ( HPLC) .The ANT activity was analyzed by the atrac-tyloside-inhibitor stop technique.The changes of the echocardiography and hemodynamics were also observed.RESULTS:DOX induced DCM model was successfully established.The protein levels of PPARαand PGC-1αin control group were significantly higher than those in DOX group (P<0.05).Both of the high-energy phosphate contents and the transport ac-tivity of ANT were decreased in DOX group (P<0.05), and the hemodynamic parameters were disordered (P<0.01). Compared with DOX group, PPARαinhibitor pre-treatment significantly reduced the PPARα/PGC-1αexpression.Mean-while, high-energy phosphate contents in the mitochondria and the ANT transport activity of the mitochondria decreased, as well as the left ventricular function ( P<0.05) .On the other hand, PPARαagonist significantly increased the expression of PPARαand PGC-1α, and improved the transport activity of ANT.In addition, the hemodynamic parameters were amel-iorated, but the high-energy phosphate contents of the mitochondria did not significantly change.CONCLUSION:PPARα/PGC-1αplays an important role in the regulation of ANT transport activity in dilated cardiomyopathy induced by DOX, and the activation of PPARα/PGC-1αhas protective effects on the DCM induced by DOX.
