Mechanisms of HBx-induced hepatocarcinogenesis |
Regulatory noncoding RNAs |
miRNAs |
miR-148a activates mTOR11
|
miR-15b increases the levels of Globo H12
|
miR-205 increases the expression of ACSL1 and triglyceride13,14
|
miR-224 silences Smad415
|
lncRNAs |
HULC suppresses the expression of p1816
|
Dreh represses the expression of intermediate filament protein vimentin17
|
Epigenetic modification |
Methylation |
Upregulates the expression of DNMT1 and DNMT3A21-23
|
Acetylation |
Induces the expression of HDAC124-26
|
Upregulates SIRT128,29
|
Functions of HBx in HBx-related hepatocarcinogenesis |
Signaling pathway |
Akt |
Stabilizes β-catenin32
|
Promotes IKKα nuclear translocation33
|
Wnt |
Hyperactivates the transcription of cyclin D, VEGF, c-MYC, and AR36,37,64
|
Stat |
Activates the Twist promoter39,40
|
NF-κB |
Upregulates the heat shock protein gp9641
|
Enhances the expression of IKKα42,43
|
Cell transformation |
Exerting strong growth arrest and imbalanced cell-cycle progression45-47
|
Apoptosis |
Caspases |
Inhibit Notch signaling49
|
Accelerate the loss of Mcl-1 protein50
|
Mitochondria |
Stimulate the mitochondrial translocation of Raf-151
|
Induce the perinuclear clustering of the mitochondria52
|
Increase the mitochondrial calcium uptake53
|
PDCD4 |
Induce TGF-β1-mediated apoptosis9,55
|
Immune system |
Innate immune |
Prevent the induction of IFN-β58,59
|
Adaptive immunity |
Accumulate CD8+ T cells62
|