Changes in SOD and MDA in different drug groups treated with AZA. Cells were cultured for 12 h with each of the anti-tuberculosis drugs (isoniazid, INH; pyrazinamide, PZA; INH + rifampicin, RFP; or INH + RFP + PZA) or their combination with AZA (10 μM). The enzyme activity of SOD was detected by the hydroxylamine method, and the MDA concentration was detected by the TBA method. Each group included 6 parallel samples, each of which was measured 3 times.