The protective effect of peony extract on acute myocardial infarction in rats.
To investigate the protective effects, and the mechanisms involved, of an extract of the medicinal herb radix paeoniae rubra (PE) on cardiovascular disease, acute myocardial infarction (AMI) was induced by ligation of the left coronary artery in Sprague Dawley rats. Animals were randomly divided into six groups: control, sham-operated, AMI, AMI+PE low dose, AMI+PE high dose, and AMI+positive control. Myocardial enzymes, cytokines, oxidative stress, blood coagulation times, a marker for early stage apoptosis, caspase-3 activity, and expression levels of bax, bcl-2 and fas in isolated primary cardiomyocytes were examined. In contrast with control and sham groups, significant increases in the following parameters were measured in the blood of AMI group animals: activities of cardiac enzymes including glutamic oxaloacetic transaminase, creatine kinase, creatine kinase-MB, lactate dehydrogenase, α-hydroxybutyric dehydrogenase, and levels of IL-10, TNFα, and lipid peroxidation. Under the same conditions, superoxide dismutase activity, thrombin time and activated partial thromboplastin time decreased significantly. PE showed a dose-dependent protection against AMI-induced alterations in cardiac enzymes, cytokines, oxidative stress, and coagulation. In AMI cardiomyocytes, compared with control and sham groups, the left ventricular end-diastolic pressure, early stage apoptosis, caspase-3 activity and expression levels of bax, bcl-2 and fas significantly increased, while the ratio bcl-2/bax decreased. PE showed dose-dependent protection. These results suggest that PE is an effective agent for protecting against AMI; possible mechanisms may include the regulation of cardiac enzymes, cytokines, oxidative stress, coagulation and apoptosis.
Department of Biological Science and Engineering, Institute of Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, Xi'an Jiaotong University School of Life Science and Technology, Xi'an 710049, China. mo_xy@mail.xjtu.edu.cn
Xiaoyan
X
Mo
Nana
N
Zhao
Xiaoyang
X
Du
Liyuan
L
Bai
Jiankang
J
Liu
D000818:Animals; D000975:Antioxidants / Q000494:pharmacology / Q000627:therapeutic use*; D017209:Apoptosis / Q000187:drug effects; D015415:Biomarkers / Q000097:blood; D001777:Blood Coagulation / Q000187:drug effects; D001794:Blood Pressure / Q000187:drug effects; D003331:Coronary Vessels / Q000187:drug effects; D016207:Cytokines / Q000097:blood; D004305:Dose-Response Relationship, Drug; D004365:Drugs, Chinese Herbal / Q000494:pharmacology / Q000627:therapeutic use*; D004798:Enzymes / Q000097:blood; D005260:Female; D006321:Heart / Q000187:drug effects* / Q000503:physiopathology; D008026:Ligation; D015227:Lipid Peroxidation / Q000187:drug effects; D008297:Male; D009203:Myocardial Infarction / Q000097:blood / Q000188:drug therapy* / Q000378:metabolism; D009206:Myocardium / Q000378:metabolism; D032383:Myocytes, Cardiac / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D029596:Paeonia; D010314:Partial Thromboplastin Time; D008517:Phytotherapy; D010936:Plant Extracts / Q000627:therapeutic use; D018517:Plant Roots; D011897:Random Allocation; D051381:Rats; D013918:Thrombin Time; D017725:Ventricular Pressure / Q000187:drug effects
D000975:Antioxidants; D015415:Biomarkers; D016207:Cytokines; D004365:Drugs, Chinese Herbal; D004798:Enzymes; D010936:Plant Extracts