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2016 ; 6
(ä): 27157
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miR-139-5p Inhibits the Epithelial-Mesenchymal Transition and Enhances the
Chemotherapeutic Sensitivity of Colorectal Cancer Cells by Downregulating BCL2
#MMPMID27244080
Li Q
; Liang X
; Wang Y
; Meng X
; Xu Y
; Cai S
; Wang Z
; Liu J
; Cai G
Sci Rep
2016[May]; 6
(ä): 27157
PMID27244080
show ga
MicroRNAs (miRNAs) are important regulators involved in various cancers,
including colorectal cancer (CRC). The functions and mechanisms of the miRNAs
involved in CRC progress and metastasis are largely unknown. In this study, miRNA
microarray analysis was performed to screen crucial miRNAs involved in CRC
progress, and miR-139-5p was chosen for further study. The functional roles of
miR-139-5p in colon cancer were demonstrated by CCK-8 proliferation assay, cell
invasion and migration, cell apoptosis and in a KO mouse study. miR-139-5p
expression was significantly decreased in cancer tissues compared to normal
tissues. The miR-139-5p expression level was associated with tumour stage
(P?0.01). Function studies revealed that miR-139-5p was significantly
correlated with the metastasis potential and drug resistance of colon cancer
cells by affecting the epithelial-mesenchymal transition (EMT). Then, we
identified BCL2 as a direct target of miR-139-5p cells in vitro. The patient
samples and KO mice model showed that BCL2 expression was inversely correlated
with the expression of miR-139-5p. In conclusion, we found that miR-139-5p
targeted the BCL2 pathway to reduce tumour metastasis and drug sensitivity in
CRC. This axis provided insight into the mechanism underlying miRNA regulation of
CRC metastasis and a novel therapeutic target for CRC therapy.