L. Kobylinska¹, O. Klyuchivska², R. Lesyk¹, R. Stoika²

¹Danylo Halytsky Lviv National Medical University, Ukraine;
²Institute of Cell Biology, Lviv, Ukraine;
e-mail: lesya8@gmail.com

Received: 05 January 2019; Accepted: 20 March 2019

Oxidative stress is one of the main mechanisms by which anticancer chemotherapeutics damage normal tissues and organs. At the same time, it is an important biochemical mechanism of the neoplastic action of such medicines. The aim of the present study was to determine the pro-oxidant-antioxidant balance in vitro and in vivo under the influence of novel 4-thiazolidinone-based chemotherapeutics with anticancer potential. An advantage of using these compounds in vivo is their low general toxicity, compared to doxorubicin (Kobylinska L. et al., 2014, 2015, 2016). The 4-thiazolidinone derivatives (Les-3288, Les-3833, Les-3882) with previously established anti-neoplastic activity in vitro (Kobylinska L. et al., 2016) and antitumor effect in vivo (Kobylinska L. et al., 2018) were synthesized, dissolved in dimethyl sulfoxide, and administered intraperitoneally to Wistar rats daily for 20 days. Doses of the injected drugs equaled 10% of the LD₅₀, namely doxorubicin – 5.5 mg/kg, Les-3882 and Les-3833 – 10.7 mg/kg, and Les-3288 – 24.3 mg/kg. The radical scavenging of 1,1-diphenyl-2-picrylhydrazil (DPPH) activity was measured. Concentrations of thio-barbituric acid-active products were assessed in blood serum, liver, heart and kidney tissues of treated rats. Additionally, the activities of superoxide dismutase, catalase and glutathione peroxidase were measured in blood serum and these tissues. We found that administration for 20 days of Les-3288, Les-3833 and Les-3882 compounds disturbed the pro-oxidant-antioxidant balance in the treated rats. Increased amounts of products of reactions of lipid peroxidation and exhaustion of the enzymatic antioxidant system in liver, heart and kidney tissues were detected. In general, Les-3288, Les-3833 and Les-3882 compounds exhibited less pro-oxidant action, compared with the effect of doxorubicin. According to the results of influencing the pro-oxidant-antioxidant balance in the selected tissues, the studied compounds can be ranked in the following order: doxorubicin >> Les-3833 > Les-3288 >> Les-3882. The results of measuring direct scavenging ability of these compounds observed in 24 h suggests their lower toxic effect compared with the effect of the doxorubicin. The obtained results are in correspondence with the results of our recent experiments demonstrating their antineoplastic effect in vitro (Kobylinska L. et al., 2016) and anticancer action in vivo (Kobylinska L. et al., 2018), as well as their lower general toxicity in vivo compared with doxorubicin (Kobylinska L. et al., 2014, 2015, 2016).

Keywords: 4-thiazolidinone derivatives, doxorubicin, enzymes of antioxidant defense, pro-oxidant-antioxidant balance, products of lipid peroxidation