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Coronary Progenitor Cells and Soluble Biomarkers in Cardiovascular Prognosis after Coronary Angioplasty
Published on: January 28, 2020
Differential mononuclear cell activity and endothelial inflammation in coronary artery disease and cardiac syndrome X
Chih-Pei Lin1, Wen-Tsai Lin, Hsin-Bang Leu
1Department of Pathology, Taipei Veterans General Hospital, 201 Shih-Pai Road Section 2, Taipei, Taiwan 11217, ROC.
Insights
Coronary artery disease (CAD) patients show significant endothelial inflammation and mononuclear cell activation. Syndrome X patients have increased superoxide free radicals but minimal inflammation, suggesting preserved metabolic profiles protect against vascular inflammation.
Area of Science:
- Cardiovascular Medicine
- Immunology
Background:
- Coronary artery disease (CAD) is linked to endothelial inflammation and activated circulating mononuclear cells.
- Coronary microvascular dysfunction (Syndrome X) can cause myocardial ischemia despite normal coronary angiograms.
Purpose of the Study:
- To investigate mononuclear cell activation and endothelial inflammation in Syndrome X patients.
- To compare these markers between Syndrome X, CAD, and healthy controls.
Main Methods:
- Evaluated biochemical parameters, soluble adhesion molecules, superoxide free radicals, and mononuclear cell activity.
- Included 32 Syndrome X patients, 34 CAD patients, and 17 healthy controls.
Main Results:
- Syndrome X patients exhibited higher circulating superoxide free radicals than controls and CAD patients.
- CAD patients showed reduced high-density lipoprotein and increased insulin to glucose ratio.
- Soluble intracellular adhesion molecule-1 was elevated in both Syndrome X and CAD groups; soluble vascular cell adhesion molecule and von Willebrand factor were elevated in CAD only.
Conclusions:
- CAD patients demonstrate significant endothelial inflammation and mononuclear cell activation.
- Syndrome X patients show increased superoxide free radicals but minimal endothelial inflammation and no mononuclear cell activation.
- Preserved lipid and metabolic profiles in Syndrome X may contribute to reduced vascular inflammation.
Background:
Circulating mononuclear cells could be activated with endothelial inflammation in patients with coronary artery disease (CAD). In some patients with normal coronary angiograms, myocardial ischemia could also present with coronary microvascular dysfunction (cardiac syndrome X). This study was undertaken to investigate whether mononuclear cell activation and endothelial inflammation can present in syndrome X patients.
Methods:
We evaluated the biochemical parameters, circulating soluble adhesion molecules, circulating superoxide free radicals, and mononuclear cell activity in 32 patients with syndrome X, 34 with angiographically documented CAD, and 17 age- and gender-matched healthy control subjects.
Results:
Compared to that in control subjects, plasma high-density lipoprotein was reduced (P<0.001) and insulin to glucose ratio increased (P=0.02) in CAD patients. Circulating level of soluble intracellular adhesion molecule-1 was significantly higher in both syndrome X and CAD patients than in control subjects (P<0.01), whereas the levels of soluble vascular cell adhesion molecule (P=0.02) and von Willebrand factor (P=0.01) were increased in CAD patients only. The peak (P<0.001) and total counts of superoxide free radicals in whole blood (P<0.001) was significantly higher in syndrome X patients than in the other two groups. However, phorbol-12-myristate-13-acetate-induced superoxide free radical generation of mononuclear cells was increased in CAD (10.5+/-4.6%, P=0.01) but not in syndrome X patients (8.7+/-2.0%) as compared with control subjects (7.7+/-0.5%).
Conclusions:
The results indicated that the activity of mononuclear cells was increased with significant endothelial inflammation and injury in CAD patients. In syndrome X patients, though circulating superoxide free radicals were increased, there was minimal endothelial inflammation without mononuclear cell activation. The relatively preserved lipid and metabolic profiles might contribute to less vascular inflammation in syndrome X patients.
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