Objective To study the therapeutic effect of the thrombus suction and direct percutaneous coronary intervention (PCI) for elderly patients with acute ST segment elevation myocardial infarction (STE‐MI) .Methods A total of 124 elderly pa‐tients with acute STE‐MI in our hospital from September 2012 to September 2014 were collected and divided into two groups(under the agreement of patients and family members) ,the experimental group (56 cases) was treated with thrombus suction and direct PCI ,while the control group (68 cases) was only treated with PCI treatment ;the postoperative immediate TIMI flow of coronary artery ,postoperative corrected TIMI frame count (CTFC) ,levels of myoglobin ,cTnT and CK‐MB ,percentage of ST elevation back over 50% ,postoperative 6-month follow‐up situation were observed in the two groups .Results The percentage of postoperative ST segment elevation drop>50% at postoperative 1 h in the experimental group was significantly higher than that in the control group (P<0 .05);the levels of myoglobin ,cTnT and CK‐MB ,postoperative corrected CTFC frames and rate of no reflow in the ex‐perimental group were significantly lower than those in the control group (P<0 .05);during postoperative 6 -month follow up , there were no statistically significant differences in major adverse cardiac events (such as angina pectoris ,myocardial infarction ,re‐vascularization ,etc) between the two groups(P>0 .05);the percentage of LVEF>50% in the experimental group was significantly higher than that in the control group(P<0 .05) ,moreover the percentage of LVEF>50% in the two groups had statistical differ‐ence between before and after operation(P<0 .05) .Conclusion Clinical curative effect of thrombus suction and direct PCI for eld‐erly patients with acute STE‐MI is superior to simple direct PCI treatment .

Objective To investigate the effects of chronic inflammation, induced by LPS on the development of rat aorta atherosclerosis. Methods Eighty healthy male Wistar rats were divided into 4 groups, normal control, the endotoxin group, homofat-breeded group and endotoxin-homofat-breeded group. HE staining was used to detect the change of rat aorta endomembrane and immunohistochemistry was used to detect the change of expression of TLR4 in rat aorta endothelial cell. Results The AS animal model was constructed successfully and the expression of TLR4 was at a higher level in endotoxin-homofat-breeded group than that in other groups. Conclusion Chronic inflammation has an actively effect during the development of rat aorta atherosclerosis.

Objective To investigate the correlation between caspase-3 and left ventricular function at different phases after ischemia-reperfusion. Methods Totally 36 wistar rats were randomly divided into Sham operation group and ischemia-reperfusion(IR)group. The rat ischemic cardiac region of IR group was taken after 1, 3, 6, 12 and 24-hour reperfusion followed to 30-minute ischemia and detected for the activity fragment of caspase-3 P20, the activity of caspase-3, myocardial apoptosis index, left ventricular function (LVF) and creatine kinase-MB (CK-MB) respectively. Results With reperfusion time prolonging, the activity fragment of caspase-3 P20 increased, the activity of caspase-3, myocardial apoptosis index, left ventricular function and CK-MB all changed. The activity fragment of caspase-3 P20 and CK-MB peaked at 6 h, and the activity of caspase-3 and myocardial apoptosis index at 12 h, and then maintained platform; LVSP and ?dp/dt_max increased while LVEDP decreased gradually with the reperfusion time prolonging. All indexes mentioned above of IR group had statistical significance as compared with that of Sham operation group(P

To investigate the changs in the expressions of cellular adhesion molecules (CAMs) of the myocardium after low dose interleukin 1? (IL 1?) pretreatment and the relationship between CAMs and delayed cardioprotection, we measured the change in the expressions of intercellular adhesion molecule 1 (ICAM 1) mRNA and its proteins, the expressions of leukocyte function antigen 1(CD11a) proteins, and infiltration number of polymorphonuclear leukocytes (PMNs) in the myocardium and determined the infarct size with in situ hybridization(ISH),immunohistochemistry and enzyme methods immediately,12 hours and 24 hours after IL 1? pretreatment in a model of ischemia/reperfusion of myocardium in rats. The results showed that the expressions of ICAM 1 mRNA and its protein, CD11a protein and the PMN infiltration number were significantly higher in the ILPC and NS groups than in the control at 0～24h after IL 1? or NS pretreatment( P 0 05). The results suggested that low dose IL 1? pretreatment might inhibit the expressions in the CAMs of myocardium during the late period of ischemia /reperfusion,resulting in delayed cardioprotection.

In recent years, it was found that heart was significantly protected against ischemia-reperfusion injury if it was first preconditioned by brief ischemia or by administering a potassium channel opener. Both of these preconditioning strategies were found to require opening of a K(ATP) channel, we showed that this pivotal role was mediated by the mitochondrial ATP-sensitive K+ channel (mitoK(ATP)). As the mechanism was not clarified yet, this paper reviewed the evidence showing that the mechanism and the characters of mito K(ATP) and its cardioprotection against ischemia-reperfusion injury

Objective To investigate the effects of simvastatin on the abatement of the mRNA,protein expression of RhoA and the improvement of the cardiac remodeling and cardiac disfunction after the myocardiac infarction in rats.Methods Rats were divided into 3 groups: the control group,the myocardiac infarction group and Simvastatin intervened group.After 8 weeks,cardiac weight index and hemodynamics were observed,mRNA and protein expression of RhoA in cardiac muscles was measured. Results Compared with the control group,the cardiac weight index and the mRNA and protein expression were increased in rats with myocardiac infarction and the hemodynamics was worsened(P

Objective To investigate the effects of advanced glycosylation end-products (AGEs) on the expression of acyl coenzyme A: cholesterol acyltransferase-1 (ACAT-1) in cultured THP-1 macrophages. Methods THP-1 cells were differentiated into macrophages after cultured in RPMI1640 media containing 0.1 ?mol/L PMA for 72 h. THP-1 macrophages were then exposed to AGE-modified bovine serum albumin (AGE-BSA, at concentration of 50, 100, 200 mg/L) for 24 h or to 200 mg/L AGE-BSA for 0, 12, 24, 36 h. Expression of ACAT-1 mRNA and protein in THP-1 macrophages was measured by RT-PCR and Western blot, respectively. Results After induced by 0.1 ?mol/L PMA, THP-1 cells stopped proliferation and differentiated into macrophages. Treatment of THP-1 macrophages with AGE-BSA resulted in an increase in the mRNA and protein levels for ACAT-1 in a dose-and time-dependent manner. Conclusion AGEs upregulate the expression levels of mRNA and protein for ACAT-1 in cultured THP-1 macrophages, which might be partly involved in the atherogenesis in diabetic patients.

Objective To study the molecular mechanism of injection with hepatocyte growth factor (HGF) at different doses on angiogenesis in myocardium of dogs with acute myocardial infarction (MI).Methods Sixteen 1.5-year-old male hybrid dogs,weighing 11-13 kg,were divided into 500 ?g HGF treatment group,1 000 ?g HGF treatment group,sham operation group,and no MI interference group,4 dogs in each group.Expressions of VEGF,HGF,CD31,and platelet factor Ⅷ in myocardium of dogs with MI were detected,the number of micro blood vessels was calculated,and correlation between angiogenesis and expression of HGF and VEGF was analyzed in 28 d after the model was established.Results HGF gene therapy could up-regulate the expression of CD31 and VEGF.The expression of CD31 and VEGF mRNA was 0.82 and 0.39 respectively in 1 000 ?g HGF group,and 0.47 and 0.21 respectively in 500 ?g HGF group.The expression of VEGF mRNA was 0.09 and no expression of CD31 mRNA was found in MI group.HGF could increase the angiogenesis in infracted myocardium.The microvascular density was 126.4?10.6,79.8?6.0,and 21.7?2.5/mm2,respectively,in 1 000 ?g HGF group,500 ?g HGF group,and MI group (P

Objective To explore the relationship of the severity of coronary-artery stenosis with plasma levels of brain natriuretic peptide (BNP) and Meprin-α.Methods Totally 237 patients in our hospital were divided into control group (CON group), stable angina group (SA group) and acute coronary syndrome group (ACS group), according to coronary artery angiography.Patients with acute coronary syndrome were divided into 3 subgroups: unstable angina (UA) group, non-ST segment elevation myocardial infarction (NSTEMI) group and ST segment elevation myocardial infarction (STEMI) group.Patients with coronary artery disease (CAD) were divided into 3 subgroups: low-score, medium-score and high-score groups, according to coronary angiography and Syntax score.BNP and Meprin-α levels were determined in patients with coronary artery disease, and the degree of coronary artery stenosis was evaluated.The differences in above indexes were analyzed and compared among the three groups.Results Plasma levels of BNP and Meprin-α were higher in ACS group than in CON group [(233.16± 78.22)ng/L vs.(33.48 ± 13.71)ng/L, (26.89 ± 6.45) nmol/L vs.(12.83±0.66)nmol/L, both P＜0.05].Compared with UA group, plasma levels of BNP and Meprin-α were increased in NSTEMI and STEMI groups (all P＜0.05).Compared with the control group, plasma levels of BNP and Meprin-α in the Syntax scores-divided subgroups were increased (all P＜ 0.05).The plasma levels of BNP and Meprin-α in CAD patients were significantly increased along with the increase of Syntax Score.Spearman correlation analysis showed that low density lipoprotein cholesterol, glucose, BNP and Meprin-α levels had positive correlations with the occurrence of coronary heart disease, while high density lipoprotein level was negatively correlated with the occurrence of coronary heart disease (all P＜0.05).Conclusions BNP and Meprin-α levels in peripheral blood are significantly elevated in patients with coronary heart disease, and they are correlated with Syntax score.The risk of ACS is increased along with the increased BNP and Meprinα levels.

Objective To observe the changes of apoptosis and caspase 3 activity in cardiomyocytes of rats at different time points after transient ischemia and the effects of caspase 3 inhibitor Ac DEVD CHO on reperfusion injury Methods A total of 122 rats were divided randomly into 3 groups: IR group, IR+Ac DEVD CHO group and sham group The ischemic samples were observed at 30 min after ischemia followed by reperfusion at 1, 3, 6, 12 and 24 h The apoptotic cardiomyocytes, the activity of caspase 3 and the myocardial infarction area were determined by TUNEL method, fluorescent assay and TTC dyeing method, respectively Results Apoptosis index(AI) of cardiomyocyte and caspase 3 activity changed in a time dependent manner Highest AI and caspase 3 were found after reperfusion at 12 h The myocardial infarction area in group IR kept increasing during the period of reperfusion AI and caspase 3 activity were positively correlated with the myocardial infarction area( P