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Abstract Title:

Patchouli alcohol ameliorates acute liver injury via inhibiting oxidative stress and gut-origin LPS leakage in rats.

Abstract Source:

Int Immunopharmacol. 2021 Sep ;98:107897. Epub 2021 Jun 25. PMID: 34182243

Abstract Author(s):

Lieqiang Xu, Qionghui Huang, Xiaocui Tan, Qian Zhao, Jiazhen Wu, Huijun Liao, Weipeng Ai, Yuhong Liu, Zhengquan Lai, Ludi Fu

Article Affiliation:

Lieqiang Xu

Abstract:

Alcoholism represents a predisposing factor for liver-related morbidity and mortality worldwide. Pogostemon cablin has been widely used in China for the treatment of digestive system diseases. Patchouli oil, the major active fraction of Pogostemon cablin, can ameliorate alcohol-induced acute liver injury (ALI). However, patchouli alcohol (PA),a principal bioactive ingredient of PO, exerts a protection against ALI remains elusive. Thepresentwork focused on the hepatoprotection of PA against acute ethanol-induced hepatotoxicity in rats. In this study, male Wistar rats orally received PA (10, 20, or 40 mg/kg), PO (400 mg/kg) and silymarin (200 mg/kg) for ten days. On the 8th day, the rats orally received 65% ethanol (10 mL/kg, 6.5 g/kg) every 12 h for 3 days. Results showed that PA wasfound to reduce alcohol-induced ALI, as evidenced bysignificantly alleviated histopathologicalalterations,decreased the elevation ofALT and AST levels, and enhancedthe alcoholdehydrogenase(ADH) andaldehyde dehydrogenase (ALDH) activities. Additionally, PA markedly suppressed ROS levels and increased antioxidant enzyme activities via the CYP2E1/ROS/Nrf2/HO-1 pathway. PA regulated lipid accumulation by markedly inhibiting the expression of lipogenesis-related genes and stimulating that of lipolysis-relatedgenes, which were associated with the activation of theAMPKpathway. What's more, PA pretreatment also restored acute alcohol-inducedalterationsin gut barrier function, colonic histopathology, andgut microbiota richness and evenness. PA pretreatment alleviated gut-origin LPS-inducedinflammation by inhibiting the MyD88/TLR4/NF-κB signal pathway. In general, PA ameliorates ethanol-induced ALI via restoration of CYP2E1/ROS/Nrf2/HO-1-mediatedoxidativestressand AMPK-mediated fat accumulation, aswell as alleviation of gut-LPS-leakage-induced inflammation regulated by the MyD88/TLR4/NF-κB signaling pathway.

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