EN
In this study we advised question whether cerebrospinal fl uid oxidative stress markers are associated with neurotoxicity of chemotherapy of acute lymphoblastic leukaemia (ALL). Examination of 38 ALL patients revealed a statistically signifi cant increase in 8-isoprostane and decrease in total antioxidative capacity during the treatment. Dynamic analysis revealed a statistically signifi cant increase in isoprostane starting on the 59th day of the treatment when the levels were highest and remained raised during all the treatment course. The mean 8-isoprostane level at the diagnosis was 9.05 ± 5.12 pg/ml, and no correlation with initial leukocytosis, organomegaly and lactate dehydrogenase level was noted. Dynamic data analysis revealed a statistically signifi cant increase in 8-isoprostane on the 59th day of the treatment (24.85 ± 26.28) and at four points during consolidation phase (17.28 ± 8.09; 22.72 ± 21.79; 24.92 ± 22.74; 32.32 ± 26.85) as compared to its level at the diagnosis (P<0.01. The mean total antioxidative capacity level at the diagnosis was (203.98 ± 15.11 μmol/l). Dynamic data analysis revealed a statistically signifi cant decrease in total antioxidative capacity on the 59th day of the treatment (189.76 ± 4.64) and at one point during consolidation phase (188.29 ± 8.46) as compared to its level at the diagnosis (P<0.05). The study suggests that standard ALL treatment may cause neurotoxicity by oxidative stress.