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2016 ; 9
(ä): 2305-15
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MicroRNA-145-5p inhibits gastric cancer invasiveness through targeting N-cadherin
and ZEB2 to suppress epithelial-mesenchymal transition
#MMPMID27143926
Jiang SB
; He XJ
; Xia YJ
; Hu WJ
; Luo JG
; Zhang J
; Tao HQ
Onco Targets Ther
2016[]; 9
(ä): 2305-15
PMID27143926
show ga
MicroRNA (miR)-145-5p has been reported to function as a suppressor of cancer and
plays an important role in cancer invasiveness. Epithelial-mesenchymal transition
(EMT) is an important process in cancer invasion and migration. However, the
involvement of miR-145-5p in EMT in human gastric cancer (GC) remains unclear. In
this study, we aimed to investigate the molecular mechanisms by which miR-145-5p
regulates EMT in GC invasiveness. We used quantitative real-time polymerase chain
reaction to investigate the miR-145-5p expression level in GC and matched normal
tissues. The effects of miR-145-5p on GC cell invasion and migration abilities
were evaluated using Transwell models. The relationships among miR-145-5p and
zinc-finger E-box binding homeobox 2 (ZEB2), E-cadherin, and N-cadherin were
analyzed by quantitative real-time polymerase chain reaction and Western blot
analyses. miR-145-5p levels in primary GC tissues obtained from 60 patients were
significantly downregulated, compared to those in paired normal tissues. Lauren
classification, depth of tumor invasion, lymph node metastasis, lymphatic
invasion, and tumor-node-metastasis stage were associated with miR-145-5p
expression. miR-145-5p inhibits the expression of the candidate target gene ZEB2
to delay the invasion and migration of GC cells. ZEB2 acts as transcriptional
repressor of E-cadherin, while miR-145-5p is known to suppress N-cadherin
directly to regulate EMT. Therefore, we concluded that miR-145-5p may target
N-cadherin and ZEB2 directly to influence EMT.