Objective: This work studied platelet-neutrophil aggregates (PNA) expression in patients with acute ST-segment elevation myocardial infarction (STEMI). Methods: Our research included in 2 groups: STEMI group, n=40 patients admitted in our hospital and Control group, n=30 normal subjects. Blood levels of PNA, platelet-monocyte aggregates (PMA) and platelet-lymphocyte aggregates (PlyA) were measured by lfow cytometry at admission and the results were compared between 2 groups. Results: Compared with Control group, STEMI group had similar blood levels of PlyA and PMA,P=0.245 andP=0.312; while increased blood level of PNA,P<0.05. Correlation analysis showed that platelet-leukocyte aggregates (PLA) level was positively related to CK-MB (r=0.4992,P<0.01) and cTnI (r=0.4365,P<0.01). Conclusion: Blood level of PLA, especially PNA was significantly higher in STEMI patients which suggested that increased PNA might be sued as a new index for AMI diagnosis in clinical practice.

Objective: To explore the relationship between endogenous estrogen level and myocardial no-reflow after reperfusion in postmenopausal acute ST-elevation myocardial infarction (STEMI) patients. Methods: A total of 100 postmenopausal STEMI patients with percutaneous coronary intervention (PCI) were enrolled and divided into 2 groups: Reflow group,n=77 and No-reflow group,n=23. Myocardial no-reflow was defined by TIMI≤2 grade or TIMI 3 grade and MBG≤2 grade after PCI. Blood levels of endogenous estrogen were examined before PCI; the relationship between endogenous estrogen level and myocardial no-reflow was assessed by Logistic regression analysis. Results: Compared with Reflow group, No-reflow group showed increased blood levels of estrone, estradiol, high sensitivity C-reaction protein (hs-CRP),P<0.05 and decreased sex hormone binding globulin (SHBG),P<0.05. Univariate analysis indicated that the length of lesion, thrombus score≥4, blood levels of estrone, estradiol and hs-CRP were positively related to no-reflow occurrence,P<0.05. Multi Logistic regression analysis presented that thrombus score≥4 (OR=4.994, 95%CI 1.987-10.518,P=0.035) and estradiol level (OR=4.091, 95% CI 1.105-8.582;P=0.046) were the independent risk factors for no-reflow occurrence. Conclusion: High blood level of endogenous estrogen was positively related to myocardial no-reflow after PCI in postmenopausal STEMI patients, which implied that endogenous estrogen might be the independent risk factor for no-reflow occurrence.

Objective To explore the correlation between expression of nuclear factor kappa B (NF-kappa B) in peripheral blood monouclear cells(PBMC) and the severity of coronary artery lesion in patients with acute coronary syndrome(ACS). Methods The 81 patients were diagnosed with coronary heart disease, and all of them underwent immediate or selective coronary angiography(CAG) The nuclear protein level of activated NF-B was detected by Western blot and semi-quantity image analysis was done. Coronary angiograms were scored according to Gensini integration. The relationship between NF-κB and Gensini score was analyzed. Results The protein expression of NF-κB in PBMC in ACS group was significantly higher than that in stable angina group and control group (0.85±0.18 vs. O.75±0.21 and 0.71±0.23, F=3.72, P<0.05). The protein expression of NF-κB was not correlated with Gensini score(r=0.07, P>0.05). Conclusions The ACS patients have the activation of NF-κB in PBMC. The protein expression of NF-κB is not correlated with Gensini score, which does not suggest an implication of the severity of coronary artery.