Methotrexate causes oxidative stress in rat kidney tissues

Area of Science:

• Biochemistry
• Toxicology
• Pharmacology

Background:

• Methotrexate (MTX) is a vital chemotherapeutic agent used for various cancers.
• Nephrotoxicity is a known complication associated with MTX therapy.
• Understanding the mechanisms of MTX-induced kidney damage is crucial for patient safety.

Purpose of the Study:

• To investigate the impact of MTX on the oxidant/antioxidant balance in rat kidney tissues.
• To explore the enzymatic pathways involved in MTX-induced nephrotoxicity.

Main Methods:

• Female Sprague-Dawley rats were administered MTX intravenously weekly for 7 weeks.
• Kidney tissues were analyzed for malondialdehyde (MDA) levels and antioxidant potential (AOP).
• Activities of key enzymes including superoxide dismutase, catalase, and xanthine oxidase were measured.

Main Results:

• A significant increase in MDA levels was observed in the MTX-treated group compared to controls (p<0.05).
• No significant differences were found in antioxidant potential (AOP) values between the groups.
• Enzyme activities related to antioxidant defense and purine metabolism did not show significant changes.

Conclusions:

• MTX treatment induces oxidative stress in rat kidney tissues.
• Elevated oxidative stress is a potential contributing factor to MTX-induced nephrotoxicity.