Abstract
Carbon tetrachloride (CCl4)-provoked acute liver injury (ALI) is typified by intensified apoptotic, inflammatory, and oxidative changes besides mitochondrial dysfunction. Sinomenine is an active constituent in the medicinal plant Sinomenium acutum. The main objective of this study was to determine sinomenine-induced hepatoprotection following CCl4 challenge with an emphasis on unraveling the contribution of mitochondrial biogenesis-related factors. To induce ALI, CCl4 was injected i.p. and sinomenine was orally administered at 10, 25, and 50 mg/kg. Serum factors in relation to liver dysfunction were measured in addition to hepatic analysis of apoptotic, mitochondrial biogenesis, oxidative, and inflammatory parameters. Sinomenine pretreatment significantly lowered ALT and AST, MDA, IL-6, apoptosis intensity, and TNF-α and restored mitochondrial biogenesis besides enhancement of SOD, sirtuin-1, and AMPK. Sinomenine also conferred hepatoprotective impact, as was apparent by lower pathologic changes. These effects were accompanied by changes in gene expression for AMPK/sirtuin-1/PGC-1α/PPARγ. The current study showed sinomenine hepatoprotective impact in CCl4-induced ALI that is associated with its regulation of mitochondrial biogenesis and parallel enhancement of AMPK/sirtuin-1.
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