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2018 ; 11
(ä): 2375-2385
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MicroRNA-328 inhibits migration and epithelial-mesenchymal transition by
targeting CD44 in nasopharyngeal carcinoma cells
#MMPMID29740213
Lin CH
; Chiang MC
; Chen YJ
Onco Targets Ther
2018[]; 11
(ä): 2375-2385
PMID29740213
show ga
BACKGROUND: MicroRNAs (miRNAs) play crucial roles in various types of cancers,
particularly in tumor development, migration, and progression. Dysregulation of
miR-328 was reported to occur in some types of human malignancies, however, the
role of miR-328 in nasopharyngeal carcinoma (NPC) and its potential involvement
in metastasis remain undetermined. METHODS: The invasion capacity of NPC
sphere-forming cells was evaluated by in vitro cell migration assays.
Differential miRNAs expression was examined in NPC sphere-forming cells compared
to parental monolayer cells using miRNA array analysis. The role of miR-328 in
regulating NPC cells migratory properties was analyzed after miR-328 mimics
transfection. The expression of E-cadherin and CD44 was analyzed by flow
cytometry. CD44 was examined as a target of miR-328 through luciferase reporter
assays and Western blotting. RESULTS: Here, we report that NPC TW01 and TW06
sphere-forming cells exhibited increased migratory ability in comparison with
parental monolayer cells. Sphere-forming cells had significantly lower levels of
miR-328, as observed using miRNA arrays and confirmed through real-time
polymerase chain reaction. Overexpression of miR-328 induced by transfection with
synthetic miR-328 mimics decreased the migration of NPC sphere-forming cells. The
inhibitory effects were associated with increased expression of E-cadherin and
the downregulated expression of mesenchymal markers such as N-cadherin, Snail,
and vimentin. Moreover, our results demonstrated that miR-328 suppressed NPC cell
migration and inhibited the epithelial-mesenchymal transition process directly
through a binding site on the CD44 3' untranslated region. CONCLUSION: miR-328, a
previously unrecognized miRNA, may serve as a potential prognostic marker and
therapeutic target for NPC.