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- W2954883306 abstract "Hepatitis B virus (HBV) infection and aflatoxin B1 (AFB1) exposure have been recognized as independent risk factors for the occurrence and exacerbation of hepatic steatosis but their combined impacts and the potential mechanisms remain to be further elucidated. Here, we showed that exposure to AFB1 impaired mitochondrial dynamics and increased intracellular lipid droplets (LDs) in the liver of HBV-transgenic mice in vivo and the hepatitis B virus X protein (HBx)-expressing human hepatocytes both ex vivo and in vitro. HBx combined with AFB1 exposure also up-regulated receptor interaction protein 1 (RIP1), receptor interaction protein 3 (RIP3) and activated mixed lineage kinase domain like protein (MLKL), providing evidence of necrosome formation in the hepatocytes. The shift of the mitochondrial dynamics towards imbalance of fission and fusion was rescued when MLKL was inhibited in the HBx and AFB1 co-treated hepatocytes. Most importantly, based on siRNA or CRISPR/Cas9 system, we found that the combination of HBx and AFB1 exposure increased cyclooxygenase-2 (COX-2) to mediate up-regulation of RIP3 and dynamin-related protein 1 (Drp1), which in turn promoted location of RIP3-MLKL necrosome on mitochondria, subsequently exacerbated steatosis in hepatocytes. Taken together, these findings advance the understanding of mechanism associated with HBx and AFB1-induced hepatic necrosome formation, mitochondrial dysfunction and steatosis and make COX-2 a good candidate for treatment." @default.
- W2954883306 created "2019-07-12" @default.
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- W2954883306 date "2019-07-07" @default.
- W2954883306 modified "2023-10-16" @default.
- W2954883306 title "HBx combined with AFB1 triggers hepatic steatosis via COX‐2‐mediated necrosome formation and mitochondrial dynamics disorder" @default.
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- W2954883306 doi "https://doi.org/10.1111/jcmm.14388" @default.
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