Changes of serum levels of myeloperoxidase and lipoxin A 4 in patients with coronary heart disease and its significance / 心血管康复医学杂志

ABSTRACT

Objective:To observe changes of serum levels of myeloperoxidase (MPO) and lipoxin A4 (LXA4) in pa‐tients with coronary heart disease (CHD) and explore its clinical significance .Methods:A total of 120 CHD patients treated in our hospital from Jun 2013 to Sep 2014 were selected as CHD group ,another 40 healthy subjects were re‐garded as normal control group .According to CHD type ,patients were divided into stable angina pectoris (SAP) group (n=36) ,unstable angina pectoris (UAP) group (n=46) and myocardial infarction (MI) group (n=38) .Ac‐cording to plaque nature assessed by CT value ,patients were divided into calcified plaque group (n= 27) ,mixed plaque group (n=31) and non-calcified plaque group (n=62) .Levels of MPO and LXA4 and ratio of MPO/LXA4 were compared among all groups .Results:Compared with normal control group ,there were significant rise in MPO level [ (167.2 ± 20.4) U/L vs .(218.3 ± 32.5) U/L] and MPO/LXA4 [ (0.78 ± 0.08) vs .(1.34 ± 0.27)] ,and sig‐nificant reduction in LXA4 level [ (214.6 ± 31.3) nmol/L vs .(162.4 ± 22.4) nmol/L] in CHD group ,P<0.05 or<0.01 .Compared with SAP group ,there were significant rise in MPO level [ (180.4 ± 21.6) U/L vs .(230.3 ± 32.5) U/L vs .(238.6 ± 44.7) U/L] and MPO/LXA4 [ (0.97 ± 0.11) vs .(1.37 ± 0.23) vs .(1.62 ± 0.25)] ,and significant reduction in LXA4 level [ (184.7 ± 23.7) nmol/L vs .(156.3 ± 21.2) nmol/L vs .(148.4 ± 19.6) nmol/L] in UAP group and MI group ,and MPO/LXA4 of MI group was significantly higher than that of UAP group , P<0.05 or < 0.01 . Compared with calcified plaque group and mixed plaque group , there were significant rise in MPO level [(196.3 ± 27.2) U/L vs .(211.2 ± 24.6) U/L vs .(231.6 ± 26.5) U/L] and MPO/LXA4 [(1.13 ± 0.14) vs .(1.26 ± 0.16) vs .(1.51 ± 0.21)] ,and significant reduction in LXA4 level [ (174.3 ± 23.4) nmol/L vs .(167.4 ± 21.2) nmol/L vs .(154.6 ± 19.2) nmol/L] in calcified plaque group ,and MPO/LXA4 of mixed plaque group was significantly higher than that of calcified plaque group , P<0.05 or <0.01 .Conclusion:There exist significant ab‐normal levels of MPO and LXA4 in CHD patients ,ratio of MPO/LXA4 is more helpful for determining disease se‐verity and stability of atherosclerotic plaque .