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Many xenobiotics are known to cause hepatic damage with subsequent significant morbidity and mortality. Doxorubicin (DOX) is a broad-spectrum antineoplastic agent. DOX is reported to cause hepatocellular damage. Previous studies verified the promising role of many natural antioxidant products against various models of hepatic dysfunction. We conducted this study to evaluate the possible hepatoprotective effect of silymarin (SILY) and/or chlorogenic acid (CGA) in a rat model of DOX-induced hepatotoxicity. For this purpose, we randomly divided 30 adult male rats into five equal groups as control, DOX, co-treated DOX with SILY, co-treated DOX with GCA and co-treated DOX with SILY and CGA groups. All treatments were administered every second day for 4 weeks. Our results showed that simultaneous SILY and CGA administration caused a significant decrease in hepatic apoptosis biomarkers (hepatic caspase-3 and nuclear factor-κB levels), a significant improvement in hepatic oxidant/antioxidant status (malondialdehyde and superoxide dismutase) and significant decrease in hepatic pro-inflammatory biomarkers (tumor necrosis factor-alpha and interlukin-1β) compared with DOX treatment. We concluded that adding CGA to SILY acts as a hepatoprotective agent against DOX-induced liver injury through inhibiting apoptosis biomarkers, maintaining antioxidant enzyme levels, decreasing pro-inflammatory cytokines as well as regulating liver adenosine monophosphate-activated protein kinase signaling.

toxicology research

Silymarin in combination with chlorogenic acid protects against hepatotoxicity induced by doxorubicin in rats: possible role of adenosine monophosphate–activated protein kinase pathway