Methotrexate (MTX) is an important drug for rheumatic and non-rheumatic
disease therapy. MTX has been associated with many adverse effects
ranging from asymptomatic transaminase elevation to fibrotic tissue
formation and fatal hepatic necrosis due to oxidative stress. Concerns
regarding potential liver toxicity have led to the avoidance of
medication, termination, or advice for inquiries in clinical care. The
protective and therapeutic effects of a new generation anti-angina drug,
ranolazine (RAN), on MTX-induced liver damage were investigated by
evaluating its antioxidant mechanism in rats. Thirty-two female Wistar
Albino rats were randomly assigned to Control, RAN, prophylaxis, and
treatment groups (n=8/group). Liver function enzymes, histopathological
assessment and serum biochemical parameters were examined.
Malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and
reduced glutathione (GSH) were also measured in liver tissue. MTX
administration caused mononuclear inflammation, vascular congestion,
ductal proliferation, vacuolization, and fibrosis as evaluated using
Roening grading and increases in aspartate aminotransferase, alanine
aminotransferase, alkaline phosphatase, and lactate dehydrogenase levels
( p<0.05) in the blood, which is compatible with
hepatocyte damage in the blood and increased MDA levels in the tissue.
Histopathologically, vascular congestion and ductal proliferation, and
biochemically, MDA and SOD levels and serum biochemical parameters,
significantly decreased in the RAN+MTX and MTX+RAN groups (
p<0.001) when compared with the MTX group. No
significant changes were observed in terms of SOD and GSH levels and
fibrosis scores in RAN-administered groups (
p>0.05). According to our results, RAN may be a
potential hepatoprotective agent against MTX-induced liver injury.