The subjects of the study were 75 patients with instable angina (IA) and 16 patients with chronic coronary heart disease (CHD) following transcutaneous transluminal balloon angioplasty (TTBA). Their examination included the evaluation of the changes of some cell immunity parameters, such as the levels of interleukins IL-1, IL-6, and IL-10, tumor necrosis factor alpha (TNFalpha), and serum neopterin (NEOP), the measurement of C-reactive protein level, the detection of certain viral agents in blood (herpes simplex virus (HSV), cytomegalovirus, Chlamydia pneuoniae) using polymerase chain reaction (PCR), The study revealed such signs of cell immunity disbalance as the pronounced activation of pro-inflammatory factors (IL-6, TNFalpha, and serum NEOP). Along with no changes of the activity of anti-inflammatory factors (IL-10), the research revealed the similar direction of immune shifts in IA patients and CHD patients who had no clinical signs of exacerbation and had undergone TTBA. Most patients displayed signs of persistent viral infection, which was HSV in the majority of cases.
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