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2018 ; 9
(2
): 89
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Elimination of stem-like cancer cell side-population by auranofin through
modulation of ROS and glycolysis
#MMPMID29367724
Hou GX
; Liu PP
; Zhang S
; Yang M
; Liao J
; Yang J
; Hu Y
; Jiang WQ
; Wen S
; Huang P
Cell Death Dis
2018[Jan]; 9
(2
): 89
PMID29367724
show ga
Cancer side-population (SP) represents a sub-population of stem-like cancer cells
that have an important role in drug resistance due to their high expression of
the ATP-binding cassette transporter ABCG2 involved in drug export. Auranofin
(AF), a clinical drug of gold complex that is used in treatment of rheumatoid
arthritis, has been reported inducing tumor antiproliferation. However, whether
AF can impact SP cells remains unclear. Our study showed that AF caused a
depletion of SP cells and a downregulation of stem cell markers, and impaired
their ability to form tumor colonies in vitro and incidence to develop tumors in
vivo of lung cancer cells. Reactive oxygen species (ROS) had an important role in
mediating AF-induced depletion of SP cells, which could be reversed by
antioxidant NAC. Further study revealed that AF could also cause ATP depletion by
inhibition of glycolysis. The depletion of cellular ATP might impair the function
of ABCG2 pump, leading to increased drug accumulation within the cells and thus
enhancing anticancer activity of chemotherapeutic agents such as adriamycin.
Synergistic effect of AF and adriamycin was demonstrated both in vitro and in
vivo. Simultaneous increase of ROS and inhibition of glycolysis is a novel
strategy to eliminate stem-like cancer cells. Combination of AF with adriamycin
seems to be promising to enhance therapeutic effectiveness.