Roles of high mobility group box-1 protein and myeloperoxidase deficiency in evaluating coronary stenosis and predicting vulnerability of atherosclerotic plaques / 中华老年医学杂志

ABSTRACT

Objective To elucidate the roles of high mobility group box-1 protein (HMGB1) and myeloperoxidase (MPO) deficiency in evaluating coronary stenosis and the vulnerability of atherosclerotic plaques in patients with coronary heart disease.Methods Totally 50 patients with acute myocardial infarction (AMI),50 patients with unstable angina pectoris (UAP),50 patients with stable angina pectoris (SAP) and 30 patients without coronary heart disease underwent the study.Coronary arteriography (CAG) and intravascular ultrasound (IVUS) were performed to analyze coronary stenosis and plaque characteristics and then gensini score was calculated.Concentrations of HMGB1,MPO and hypersensitive C reactive protein (hsC-RP) were measured by means of enzymelinked-immonosorbent assay (ELISA).Results Concentrations of HMGB1,MPO and hsC-RP were significantly higher in AMI and UAP patients than in SAP paticnts (all P＜ 0.01).IVUS showed that 51.3 ％ (20/39) AMI patients,46.7％ (43/92) UAP patients had soft lipid-rich plaqucs,while 52.9％(46/87) SAP patients had fibrous plaques,only 17.2％(15/87) had soft plaques.AMI and UAP patients had larger plaque burden and vascular remodeling index than did the SAP patients (both P＜0.01).In AMI group,HMGB1 and MPO levels were correlated well with gensini score and remodeling index measured by IVUS,respectively(r=0.54,0.48,allP＜0.05),while in UAP group,HMGB1 and MPO levels were correlated well with gensini score and plaque burden measured by IVUS,respectively(r=0.43,0.56,all P＜0.05).Conclusions HMGB1 and MPO are positively correlated with coronary stenosis,which can be used to predict the severity of ACS.HMGB1 and MPO are associated closely with plaque vulnerability and rupture.