Abstract
Drug-induced organ toxicity is a frequently encountered obstacle in the field of medical practice that limits the use of numerous pharmacologically valuable drugs. Methotrexate (MTX)-induced organ toxicity is unfortunately the rate-limiting factor for its clinical application. In the current study, MTX injection induced significant renal and hepatic toxicities manifested on functional, biochemical, and histopathological scales. This was associated with a significant elevation in both renal and hepatic contents of TNF-related apoptosis-inducing ligand (TRAIL) and caspase-8, biomarkers of tissue apoptosis. Inline, immunohistochemical analysis confirmed that tissue increased expression of Ki67 as a biomarker of tissue regeneration in both organs. Tranilast (TRAN) is a small molecular weight anti-inflammatory and antiallergic agent. TRAN's coadministration with MTX in the current study induced a significant tissue recovery via modulation of TRAIL/caspase-8 signaling and modulation of apoptosis-induced tissue proliferation confirmed by quantification of Ki67 expression. In conclusion, TRAN can be proposed as an effective drug to attenuate MTX-induced organ toxicity via modulation of apoptosis-induced tissue proliferation pathway.
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