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- W2912532956 abstract "To investigate the role and underlying mechanism of 4E-BP1 and S6K1 in regulating autophagy and hepatitis B virus (HBV) replication. The mRNA relative expression of HBx and its DNA level were detected by real-time PCR. The relative levels of hepatitis B surface antigen (HBsAg) were measured by enzyme-linked immunosorbent assay (ELISA). HBx DNA level of HepG2 cells transfected with pcDNA3.1(+)-HBV1.3 plasmids were detected by Southern blot. Moreover, we determined autophagy through electron microscopy, confocal microscopy and Western blot. Rapamycin promoted autophagy and the X protein synthesis concomitantly with elevation in Akt phosphorylation and Beclin1 expression. Either Beclin1 or Akt depletion suppresses the Rapa-enhanced HBV replication, whereas mTOR silencing inhibited HBV replication concurring with a decreased in both S6K1 and 4E-BP1 phosphorylation. Unexpectedly, Akt inhibitor suppressed Rapa-dependent autophagic flux and increased the level of p62/SQSTM1. While S6K1 ablation impaired autophagy and decreased X protein expression, 4E-BP1 silencing slightly influenced autophagy and increased X protein level. The underlying mechanism of 4E-BP1 and S6K1, two main downstream effectors of mTOR, in mediating HBV replication and HBV-induced autophagy remains largely unknown. Here, we propose that Akt is required for both HBV replication and Rapa-induced autophagy, and 4E-BP1 and S6K1 play a distinct role in the virus replication and autophagic process." @default.
- W2912532956 created "2019-02-21" @default.
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- W2912532956 date "2019-03-01" @default.
- W2912532956 modified "2023-10-05" @default.
- W2912532956 title "Distinct role of 4E-BP1 and S6K1 in regulating autophagy and hepatitis B virus (HBV) replication" @default.
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- W2912532956 doi "https://doi.org/10.1016/j.lfs.2019.01.039" @default.
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