ABSTRACT
Objective To evaluate the combined effects of vascular endothelial growth factor (VEGF) and placental growth factor (PLGF) on angiogenesis and cardiac function and compare with VEGF or PLGF only in acute myocardial infarction rats.Methods Seventy-five males Sprague-Dawley(SD) rats were randomly divided into five groups:sham group,NS group,VEGF group,PLGF group,and VEGF + PLGF group with 15 rats in each group.All the rats underwent LAD ligation and injection of NS,VEGF,PLGF,VEGF + PLGF,in the peri-infarct area,respectively,besides the sham group.Three weeks after coronary artery ligation and different agents injection,cardiac function,myocardial scar area,angiogenesis and arteriogenesis were studied.Cardiac structure and function,and infarct size were assessed by echocardiography.The number of new vessels and the number of new arterioles were evaluated by haematoxylin-eosin staining and immunohistochemistry staining.Results Three weeks after LAD ligation and different agents injection,the LVEDD and LVESD were significantly decreased (P ＜ 0.01)in NS group,VEGF group and PLGF group.While the LVEF and LVFS were higher in VEGF + PLGF group than that in other groups.Myocardial infarct size was reduced in VEGF group (P ＜ 0.05).Angiogenesis and arteriogenesis were higher in VEGF + PLGF group than that in VEGF group (P ＜ 0.01) and PLGF group (P ＜0.05).Angiogenesis and arteriogenesis were significantly higher in PLGF group than that in VEGF group (P＜0.01).The density of microvessels in VEGF group was higher than that in NS group (P ＜ 0.05),while arteriogenesis was of no statistical difference.Conclusion The combination of half VEGF and PLGF can increase angiogenesis and arteriogenesis in the ischemic marginal zone of myocardial infarction,decrease myocardial infarction area,and improve cardiac function.
ABSTRACT
@#Objective To evaluate the effects of trimetazidine on cardiac function and autonomic function in patients with coronary heart disease and chronic heart failure. Methods 73 patients with coronary heart disease and chronic heart failure were randomly divided into control group (conventional therapy, n=35) and trimetazidine group (conventional therapy plus oral trimetazidine, n=38). All the patients underwent echocardiography for left ventricular ejection fraction (LVEF) and left ventricular end-diastolic diameter (LVd), and 24-hour Holter electrocardiogram for heart rate turbulence (HRT) indexes, turbulence onset (TO) and turbulence slope (TS) were calculated before and 3 months after treatment. Results 3 months after treatment, LVEF increased, and LVd shrank in both groups (P<0.01). LVEF improved better in the trimetazidine group than in the control group (P<0.001). TO decreased and TS increased in the trimetazidine group (P<0.05). Only TO decreased in the trimetazidine group (P<0.05). TO and TS improved better in the trimetazidine group than in the control group (P<0.05). Conclusion Trimetazidine could improve cardiac function and autonomic function in patients with coronary heart disease and chronic heart failure.
