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2017 ; 14
(3
): 3503-3509
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Reactive oxygen species-driven mitochondrial injury induces apoptosis by
teroxirone in human non-small cell lung cancer cells
#MMPMID28927105
Wang JP
; Hsieh CH
; Liu CY
; Lin KH
; Wu PT
; Chen KM
; Fang K
Oncol Lett
2017[Sep]; 14
(3
): 3503-3509
PMID28927105
show ga
Teroxirone as an anticancer agent is used to treat human lung cancer by inducing
apoptotic cell death. Previous studies have demonstrated that the status of the
tumor suppressor p53 determined the onset of apoptotic cell death in human
non-small cell lung cancer cells (NSCLC). In order to further understand the
underlying mechanisms of lung cancer, the present study explored the targets of
teroxirone. By including antioxidants, the present study analyzed changes in cell
proliferation, cell cycle division, mitochondrial membrane potential (MMP),
reactive oxygen species (ROS), expression of apoptosis markers and cytochrome c
distribution. Subsequent to a 12 h treatment with low concentrations of
teroxirone, MMP was suppressed, followed by ROS production and apoptosis in lung
cancer cells carrying wild type p53. N-acetylcysteine inhibited apoptotic cell
death. The depleted expression of p53, reduction of apoptosis-associated active
caspase-3 and poly ADP-ribose polymerase cleavage with resurgence of the
pro-survival signal protein kinase B, all demonstrated an antioxidant-mediated
reduction of apoptosis by teroxirone. The diminished ROS intensity inhibited the
release of mitochondrial cytochrome c and DNA damage. The present study provided
evidence that teroxirone treatment induced the ROS-activated intrinsic apoptotic
pathway, which led to cell death in human NSCLC cells.