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Published on: May 24, 2024
Protective effect of antioxidant enzymes against drug cytotoxicity in MCF-7 cells
1Akdeniz University, Art-Science Faculty, Biology Department, Antalya, Turkey. aysunozkan95@yahoo.com
Aim:
To evaluate protective effect of antioxidant enzymes against epirubicin-HCI (EPI) cytotoxicity in vitro.
Materials And Methods:
Viability of MCF-7 cells treated with EPI was measured using the MTT test. Glutathione (GSH), protein content and enzymatic activity were measured spectrophotometrically. NADPH - dependent cytochrome P-450 reductase (NADPH-CYP-450) and glutathione S-transferase pi (GST-pi) expression in MCF-7 cells were determined by Western blot analysis.
Results:
The IC50 values of EPI in MCF-7 cells were 1.0, 0.7 and 0.5 ng/ml respectively for 24, 48 and 72 h applications. Simultaneously enzymatic activity of glutathione S-transferase, glutathione peroxidase, GSH and expression of GST-pi, NADPH-CYP-450 reductase were increased in EPI (1 ng/ml) - treated cells at the end of the 24 h incubation. Addition of superoxide dismutase, catalase and GSH decreased cytotoxicity of EPI.
Conclusion:
We hypothesized that the production of reactive oxygen species and hydrogen peroxide as result of EPI treatment can cause cytotoxicity in MCF-7 cells and antioxidant enzymes protect the cells against this process.
