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2018 ; 18
(1
): 1167
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TRPM7 overexpression enhances the cancer stem cell-like and metastatic phenotypes
of lung cancer through modulation of the Hsp90?/uPA/MMP2 signaling pathway
#MMPMID30477473
Liu K
; Xu SH
; Chen Z
; Zeng QX
; Li ZJ
; Chen ZM
BMC Cancer
2018[Nov]; 18
(1
): 1167
PMID30477473
show ga
BACKGROUND: Waixenicin A, a bioactive extract of soft coral Sarcothelia
edmondsoni, has been shown to be anti-neoplastic. However, its mechanisms of
action remain unclear. Cancer stem cells (CSCs) and associated stemness factors
are implicated in lung cancer. Here, we investigated the role of Waixenicin A on
CSCs-like and metastatic lung cancer cells. METHODS: We demonstrated and compared
TRPM7 expression in the non-tumor lung tissues or bronchial epithelial 16-HBE
cell line. TRPM7 was aberrantly expressed in the cancer tissues and SPCA-1,
NCI-H520, SK-MES-1, A549 and 95D cell lines. RESULTS: Increased TRPM7 expression
was associated with enhanced SOX2, KLF4, and CD133, Hsp90?, uPA, and MMP2
expression in lung cancer cells. TRPM7-silencing inhibited
epithelial-to-mesenchymal transition (EMT), suppressed stemness markers and
phenotypes, concomitantly suppressed Hsp90?/uPA/MMP2 axis. Coincidently,
Waixenicin A treatment downregulated TRPM7 and oncogenic markers; Waixenicin A
also attenuated the ability of lung cancer cells to form tumorspheres, in vitro.
In validation, our clinicopathological analyses showed that a higher TRPM7
expression was positively correlated with the larger tumor size (p?=?0.007),
positive lymph node metastasis (p?=?0.005) and disease grade (p?=?0.003).
CONCLUSIONS: Through its ability to inhibit Hsp90?/uPA/MMP2 signaling and
suppress TRPM7 expression, we showed that Waixenicin A is a potential anticancer
therapeutic agent for treating malignant lung cancer.