Parameters of free radical oxidation and antioxidant defense in patients with cervical cancer before and after radical surgical treatment

Purpose of the study. To analyse free radical oxidation and antioxidant defense in patients diagnosed with early cervical cancer (CC) before and after radical surgical treatment.

Patients and methods. Levels of diene conjugates, malondialdehyde (MDA), superoxide dismutase (SOD), catalase, glutathione, glutathione- dependent enzymes, vitamins A and E were determined in 74 women under the age of 45 (48 patients those who were at the stage of surgical treatment with a diagnosis of CC at the National Medical Research Center of Oncology in the period 2017–2020 and 26 healthy women).

Results. Patients with early CC showed significant changes in the intensity of lipid peroxidation processes and in antioxidant defense: elevate levels of MDA and diene conjugates, initial decline in the activity of SOD and catalase, low levels of vitamins A and E. These results complete the understanding of the processes occurring in the body of an oncological patient at the initial stage of tumor formation, which does not yet have an obvious clinical manifestation. After total removal of the ovaries, most of the indicators characterizing the enzymatic link of the antioxidant system tend to normalize, while the violation of the content of vitamins E and A (related to the non-enzymatic link of the antioxidant system) worsens.

Conclusions. Desynchronization of free radical oxidation processes with multidirectional changes in oxidation and antioxidation in patients with early CC at the stage of radical surgical treatment should be considered from the position of hormone‑ reducing surgery and a resulting complex of changes in the organs and systems of women with cancer.

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