ABSTRACT
Objective: To evaluate the relationship between plasma osteoprotegerin (OPG) level and coronary artery calcification in patients with hypertension and the relationship between OPG and angiotensin Ⅱ (AngⅡ). Methods: A total of 348 patients with hypertension were enrolled in this study. Coronary calcification was determined by 64-row coronary CT. Patients with hypertension were divided into coronary calcification group and non-coronary calcification group according to their coronary calcification score. We compared the clinical and laboratory indications of the two groups. The odds ratio (OR) value of risk factors for coronary calcification and the correlation coefficient between OPG and AngⅡ levels were calculated. Results: The OPG and AngⅡ levels in patients with coronary calcification were higher than those in patients without coronary calcification (P0.05). Conclusion: OPG is an independent risk factor for coronary artery calcification in patients with hypertension and is related to the severity of coronary artery calcification. In hypertensive patients with coronary artery calcification, OPG and AngⅡ levels are positively correlated.
ABSTRACT
Objective To explore the expression of macrophage migration inhibitory factor(MIF)in rat hearts with experimental autoimmune myocarditis(EAM)and the possible mechanism of resveratrol's therapeutic effect.Methods Experimental myocarditis model was established by using porcine myocardial immunoglobulin. Twenty-four male 6-week-old Lewis rats were randomly divided into control group(Con),EAM model group(MC) and resveratrol treatment group(MC+ Res).All the rats were detected and compared in the cardiac function according to echocardiographic analysis,and the expression of MIF was detected by Western blot.The degree of myocardial injury was detected by HE staining and the degree of macrophage infiltration in the myocardium was detected by immunohistochemistry.Results In control group,there was no significant inflammatory infiltration or myocardial injury in the myocardium.Heavy local infiltration of macrophages,and dissolved and fractured myocardial fibers were observed in model group.Resveratrol significantly decreased macrophage density and myocardial injury in the heart(P＜ 0.05).Compared with those in control group,LVEDs were significantly increased(P＜0.01)while LVEF and LVFS were markedly decreased in model group(P＜0.01).Compared with model group,LVEDs were significantly decreased(P＜0.05)while LVEF and LVFS were markedly increased in resveratrol group(P＜0.05).The protein expression of MIF was markedly increased in rats of model group(P＜0.01),but was decreased in resveratrol group compared with model groups(P＜ 0.05).Conclusion Increased expression of MIF may be involved in the pathogenesis of EAM.The therapeutic effect of resveratrol on EAM may be associated with down-regulated MIF expression and decreased macrophage infiltration.