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- W4220694923 abstract "Hepatic ischemia-reperfusion (I/R) injury is one of the main causes of liver dysfunction after the liver resection and transplantation. Hepatic I/R was characterized by the tissue hypoxia during ischemia phase and oxidative stress and immune response during hypoxia-reoxygenation. The objectives of the present study were to determine the protective effects of β-patchoulene (β-PAE), a novel bioactive agent, in a mice model of hepatic I/R injury and to explore its potential mechanisms.A segmental liver warm I/R injury model was performed by occluding the portal vessels for 1 h followed by 6-h reperfusion. Twenty-four mice were randomly divided into three groups: Sham, I/R, and I/R + β-PAE, with eight mice in each group. Mice were intravenously injected with β-PAE (10 mg/kg) or saline 2 h before surgery, and parameters were measured 6 h after designated treatment. Serum aminotransferase, histologic changes, cytokines expression, and apoptosis were determined. The potential effects of β-PAE on macrophage activation and apoptosis were further evaluated in a hypoxia and reperfusion (H/R) model in vitro. Oxidative stress markers (reactive oxygen species production and malondialdehyde) and cytokines expression were measured by commercial kits. Nrf2/HO-1 and NF-ƘB signaling pathways were determined by Western blotting. Finally, blockade of nuclear factor erythroid 2-related factor 2 (Nrf2) with ML385 was used to confirm the involvement of Nrf2/HO-1 pathway in H/R injury.Hepatic I/R induced apparent tissue injury as evidenced by the increased expression of serum aminotransferase, pro-inflammatory mediators production, hepatocellular apoptosis, and necrosis. β-PAE pretreatment protected mice against I/R-induced injury, which was proved by decreased serum aminotransferase and cytokines production, reduced TUNEL-positive cells, and alleviated histopathological lesion. Immunofluorescence staining showed that β-PAE suppressed the M1 polarization of Kupffer cell induced by I/R injury. Moreover, pretreatment with β-PAE suppressed H/R-induced cytokines expression and apoptosis in cultured macrophage. The mechanistic study demonstrated that β-PAE significantly promoted the nuclear Nrf2 translocation and upregulation of HO-1 while downregulating the NF-ƘB signaling pathway in both in vivo and in vitro experiments. Furthermore, blockade of Nrf2 abolished the protective effects of β-PAE on the inhibition of H/R-mediated oxidative stress, inflammatory response, and apoptosis in vitro.β-PAE preconditioning protects mice against hepatic I/R, which was at least in part through the reversing disequilibrium between Nrf2/HO-1 and NF-ƘB pathways. β-PAE might serve as a promising therapeutic agent in the treatment of hepatic I/R injury." @default.
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- W4220694923 date "2022-07-01" @default.
- W4220694923 modified "2023-10-14" @default.
- W4220694923 title "β-Patchoulene Preconditioning Protects Mice Against Hepatic Ischemia-Reperfusion Injury by Regulating Nrf2/HO-1 Signaling Pathway" @default.
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- W4220694923 doi "https://doi.org/10.1016/j.jss.2022.02.001" @default.
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