Oxidant-antioxidant status in tumor tissue of male-mice CBA at spontaneous course of hepatocarcinoma-29 and after repeated injections of lithium carbonate nanosized particles was evaluated on changes of lipid peroxidation (LPO) products level reacted with 2-thiobarbituric acid (TBA) as indicator of oxidative stress and activity of superoxide dismutase (SOD) and catalase enzymes as indicators of antioxidant defense by spectrophotometer <> (Bio-Rad, USA). Tumor development after hepatocarcinoma-29 cells injection into muscle right leg changed the levels of LPO activity in two-phase manner. TBA-active products content were decreased in 2,4 times in comparison with the control indicates after invasion of tumor cells, it was raised in 2,1 times at excessive tumor growth and diminished at terminal stage. Catalase activity was significantly elevated, but SOD activity was reduced in tumor tissue samples at active growth of hepatocarcinoma. The repeated injections of lithium carbonate nanosized particles at hepatocarcinoma inhibited processes of lipid peroxidation in tumor tissue in 2,4 times, but didn't influence on activities of catalase and SOD. Thus the effects lithium carbonate nanosized particles injections referred on maintenance of balance between the oxidant and antioxidants may be of some help to limit the progression of precancerous condition toward malignancy and tumor growth.
