FREE-RADICAL OXIDATION AND OXYGENATION OF HEMOGLOBIN AT EXACERBATION OF CYTOMEGALOVIRUS INFECTION IN THE SECOND TRIMESTER OF PREGNANCY

Abstract

The aim of the study was to assess free radical processes and their effect on oxygenation of hemoglobin in the blood of 18-21 weeks pregnant women with exacerbation of cytomegalovirus infection. We examined 40 pregnant women with exacerbation of cytomegalovirus infection and various levels of specific antibodies (IgM) at 18-21 weeks and 30 pregnant women without cytomegalovirus. The spectrophotometric method was used to determine the content of oxyhemoglobin, methemoglobin, thiobarbituric acid (TBA)-active products, superoxide dismutase in blood erythrocytes; thin layer chromatography – phosphotidylcholine, lysophosphatidylcholine; gas-liquid chromatography – arachidonic acid. Exacerbation of cytomegalovirus infection changes the activity of free radical oxidation processes, the severity of which is determined by the level of IgM antibodies and is manifested by a decrease in superoxide dismutase (p = 0.000) and phosphatidylcholine (p = 0.000), an increase in phospholipase A2 (p = 0.000), lysophosphatidylcholine (p = 0.000), arachidonic acid (p = 0.000) and TBA-active products (p = 0.000). Accumulation of superoxide anion radical and products of lipoperoxidation in erythrocytes decreases oxyhemoglobin (p = 0.000) and increases methemoglobin (p = 0.000). Exacerbation of cytomegalovirus infection at 18-21 weeks is associated with the enhancement of free radical lipid oxidation and a deficiency in the antioxidant activity of superoxide dismutase. It decreases oxygen transport properties and increases phagocytosis by red blood monocytes; and pregnant women develop further hemic hypoxia.

Keywords

• pregnancy
• cytomegalovirus infection
• peripheral blood
• free radical oxidation
• hemoglobin oxygenation
• hemic hypoxia