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2017 ; 51
(1
): 63-74
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Metadherin regulates actin cytoskeletal remodeling and enhances human gastric
cancer metastasis via epithelial-mesenchymal transition
#MMPMID28534938
Du Y
; Jiang B
; Song S
; Pei G
; Ni X
; Wu J
; Wang S
; Wang Z
; Yu J
Int J Oncol
2017[Jul]; 51
(1
): 63-74
PMID28534938
show ga
Metadherin (MTDH) can be recruited to mature tight junction complexes, and it
regulates mesenchymal marker protein expression in many tumors and promote cancer
metastasis. This study investigated the influence of MTDH expression on gastric
cancer and to elucidate the potential mechanisms by which MTDH regulates actin
cytoskeletal remodeling and enhances human gastric cancer metastasis via
epithelial-mesenchymal transition (EMT). Relative MTDH mRNA expression levels
were assessed by quantitative real-time PCR (Q-PCR), and MTDH protein expression
levels and localization were evaluated via immunohistochemical (ICH) staining. We
studied the role of MTDH in cancer cell migration and invasion by modulating MTDH
expression in the gastric cancer cell lines MKN45 and AGS. We also confirmed the
functions of MTDH through in vivo experiments. We found that MTDH expression
levels were correlated with lymph node metastasis, TNM stages and decreased OS
(P=0.002, <0.001 and 0.010, respectively) in human gastric cancer and that MTDH
upregulation promoted EMT in vitro. Consistent with this finding, MTDH
downregulation inhibited cell migration and invasion in vitro and suppressed
tumor growth and metastasis in vivo. Furthermore, MTDH knockdown regulated actin
cytoskeletal remodeling and inhibited EMT. Overall, our results provide a novel
role for MTDH in regulating gastric cancer metastasis.