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2015 ; 6
(7
): 643-51
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gab.com Text
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English Wikipedia
The Blockage of KCa3 1 Channel Inhibited Proliferation, Migration and Promoted
Apoptosis of Human Hepatocellular Carcinoma Cells
#MMPMID26078795
Liu Y
; Zhao L
; Ma W
; Cao X
; Chen H
; Feng D
; Liang J
; Yin K
; Jiang X
J Cancer
2015[]; 6
(7
): 643-51
PMID26078795
show ga
The intermediate conductance calcium-activated potassium channel KCa3.1 plays an
important role in regulating cell proliferation and migration. However, the role
of KCa3.1 channel in human hepatocellular carcinoma remained unknown. This study
was therefore performed to investigate the effects of KCa3.1 potassium channel
blocker on the proliferation, apoptosis and migration of human hepatocellular
cancer cells HepG2. KCa3.1 mRNA and protein were detected in HepG2. Furthermore,
KCa3.1 potassium channel blocker TRAM-34 was capable to inhibit the proliferation
and induce the apoptosis of HepG2 cells, which can be partially attenuated by
1-EBIO, an activator of KCa3.1 channel. Moreover, the migration of HepG2 was
obviously inhibited by TRAM-34. Consistently, knockdown of KCa3.1 channel using
its siRNA was also able to induce apoptosis and suppress proliferation and
migration of HepG2. Meanwhile, intracellular ROS level was found augmented in
HepG2 treated with TRAM-34. More importantly, p53 protein was found translocation
from the cytoplasm into the nuclei of HepG2. Collectively, inhibition of KCa3.1
channel suppressed the growth and migration, and promoted the apoptosis of human
hepatocellular carcinoma cells by regulating intracellular ROS level and
promoting p53 activation. This data suggests TRAM-34 as a promising anti-tumor
drug for liver cancer.