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2017 ; 18
(9
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
miR-145-5p Suppresses Tumor Cell Migration, Invasion and Epithelial to
Mesenchymal Transition by Regulating the Sp1/NF-?B Signaling Pathway in
Esophageal Squamous Cell Carcinoma
#MMPMID28832500
Mei LL
; Wang WJ
; Qiu YT
; Xie XF
; Bai J
; Shi ZZ
Int J Mol Sci
2017[Aug]; 18
(9
): ä PMID28832500
show ga
MicroRNAs (miRNAs) play important roles in the progression of human cancer.
Although previous reports have shown that miR-145-5p is down-regulated in
esophageal squamous cell carcinoma (ESCC), the roles and mechanisms of
down-regulation of miR-145-5p in ESCC are still largely unknown. Using microRNA
microarray and Gene Expression Omnibus (GEO) datasets, we confirmed that
miR-145-5p was down-regulated in ESCC tissues. In vitro assays revealed that
ectopic miR-145-5p expression repressed cell proliferation, migration, invasion
and epithelial to mesenchymal transition (EMT). miR-145-5p also reduced the
expressions of cell cycle genes including cyclin A2 (CCNA2), cyclin D1 (CCND1)
and cyclin E1 (CCNE1), the EMT-associated transcription factor Slug, and matrix
metalloproteinases (MMPs) including MMP2, MMP7 and MMP13. Furthermore, miR-145-5p
mimics reduced candidate target gene specificity protein 1 (Sp1) and nuclear
factor ? B (NF-?B) (p65) both in mRNA and protein levels. Knockdown of Sp1
phenocopied the effects of miR-145-5p overexpression on cell cycle regulators,
EMT and the expression of NF-?B (p65). Importantly, inhibition of the NF-?B
signaling pathway or knockdown of NF-?B (p65) phenocopied the effects of
miR-145-5p on the migration, invasion and EMT of ESCC cells. In conclusion, our
results suggested that miR-145-5p plays tumor-suppressive roles by inhibiting
esophageal cancer cell migration, invasion and EMT through regulating the
Sp1/NF-?B signaling pathway.