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2017 ; 8
(7
): 12067-12080
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Sulforaphane inhibits cancer stem-like cell properties and cisplatin resistance
through miR-214-mediated downregulation of c-MYC in non-small cell lung cancer
#MMPMID28076844
Li QQ
; Xie YK
; Wu Y
; Li LL
; Liu Y
; Miao XB
; Liu QZ
; Yao KT
; Xiao GH
Oncotarget
2017[Feb]; 8
(7
): 12067-12080
PMID28076844
show ga
We herein report that sulforaphane (SFN), a potent anti-cancer and well-tolerated
dietary compound, inhibits cancer stem-like cell (CSC) properties and enhances
therapeutic efficacy of cisplatin in human non-small cell lung cancer (NSCLC).
SFN exerted these functions through upregulation of miR-214, which in turn
targets the coding region of c-MYC. This finding was further corroborated by our
observations that plasmid or lentiviral vector-mediated expression of 3'UTR-less
c-MYC cDNA and cisplatin- or doxorubicin-induced endogenous c-MYC accumulation
was similarly suppressed by either SFN or miR-214. Further, we showed that the
reported inhibitory effects of SFN on ?-catenin are also mediated by miR-214.
SFN/miR-214 signaling inhibited CSC properties and enhanced the cytotoxicity of
chemotherapeutic drugs in vitro. Experiments with nude mice carrying xenograft
tumors showed that SFN sensitized NSCLC cells to cisplatin's efficacy, which is
accompanied by inhibition of cisplatin-induced c-MYC accumulation in tumor
tissues. Our results provided strong evidence and mechanisms to support
consideration of SFN or synthetic derivatives as a therapeutic agent in
combination with cisplatin for the treatment of patients with NSCLC and,
potentially, other types of c-MYC-addicted tumors.