Received:22 November 2016,
Published:15 May 2017
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Dapeng Yang, Hongbo Huan, Liang Zhang, et al. Norepinephrine promotes proliferation of hepatocellular carcinoma cells through enhancing Sox4 expression
Dapeng Yang, Hongbo Huan, Liang Zhang, et al. Norepinephrine promotes proliferation of hepatocellular carcinoma cells through enhancing Sox4 expression
Objective
2
To determine the effect of norepinephrine on self-renewal capacity in hepatocellular carcinoma (HCC) cells and investigate the molecular mechanism.
Methods
2
Quantitative RT-PCR and Western blotting were used to detect the expression level of CD133 in the HCC cell lines Huh7 and PLC after the treatment of 10 μmol/L norepinephrine. Sphere and clone formation assays were used to investigate the impact of norepinephrine on self-renewal capacity of HCC cells. The effects of norepinephrine (10 μmol/L) and prazosin (5 μmol/L) on the expression of stem related genes and signal pathways were detected by RT-PCR and Western blotting.
Results
2
Norepinephrine promoted the expression of CD133 in Huh7 and PLC cells. Norepinephrine facilitated sphere and clone formation in the 2 cell lines
and prazosin blocked the effect of norepinephrine (
P
<
0.05). There
were more sphere and clone formation in the cells after norepinephrine treatment than control cells and prazosin group (
P
<
0.05). Higher level of Sox4 and up-regulation of p-Akt were observed in the norepinephrine-treated cells than prazosin-treated and control HCC cells (
P
<
0.05).
Conclusion
2
Norepinephrine activates α-adrenergic receptor and up-regulates Sox4 expression
via
activating PI3K/Akt signal pathway
and thus improves self-renewal capacity in HCC cells.
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