Aim: The aim of this study is to investigate the T helper (Th)2-dependent release of interleukin(IL)-4 and IL-13 in patients with unstable angina treated with coronary angioplasty (PCI).
Methods: This study involved 48 consecutive patients with unstable angina who underwent PCI. Blood samples were taken before and 48 h after PCI to evaluate serum IL-4 and IL-13 levels. Coronary atherosclerosis was assessed in terms of the severity of the treated lesions and the presence of multivessel disease, and compared with IL release.
Results: Before and after PCI, serum IL-4 levels were, respectively, 53.1+/-110.7 and 35.1+/-16.9 pg/ml (P not significant), and serum IL-13 levels 6.7+/-3.7 and 6.0+/-2.9 pg/ml (P<0.05). A correlation was present between the severity of the treated coronary lesions and serum IL-13 levels (r 0.36; P<0.05). The patients with multivessel coronary artery disease had a higher periprocedure ratio of IL-4 than those with single-vessel coronary artery disease (1.46+/-0.76 vs. 0.89+/-0.34, P<0.001).
Conclusion: A significant decrease was observed in Th2-dependent IL concentrations after PCI; increased Th2-dependent IL levels before PCI seem to correlate with the severity of coronary atherosclerosis.
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