Abstract

Linalool, a natural compound of the essential oils, has been shown to have antinociceptive, antimicrobial, and anti-inflammatory properties. The aim of this study was to investigate the effects of linalool against lipopolysaccharide (LPS)/D-galactosamine (GalN)-induced liver injury in mice. Mice were administered with linalool 1h before receiving LPS (50 μg/kg) and GalN (800 mg/kg). The results demonstrated that linalool had a protective effect on LPS/GalN-induced acute liver injury, as evidenced by the attenuation of hepatic pathological damage, malondialdehyde (MDA) content, MPO activity and serum ALT and AST levels. Linalool alleviated serum and hepatic TNF-α and IL-6 production, as well as hepatic iNOS and COX-2 expression by inhibiting NF-κB activation. Treatment of linalool increased bcl-2 expression and inhibited caspase-3 and caspase-8 expression. In addition, linalool increased Nrf2 and heme oxygenase-1 expression up-regulation by LPS/GalN. In conclusion, our results suggested that linalool was protected against LPS/GalN-induced liver injury through induction of antioxidant defense via Nrf2 activating and reduction inflammatory response via NF-κB inhibition.

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