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2018 ; 16
(2
): 2620-2628
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miR-214-3p promotes the proliferation, migration and invasion of osteosarcoma
cells by targeting CADM1
#MMPMID30013657
Cai H
; Miao M
; Wang Z
Oncol Lett
2018[Aug]; 16
(2
): 2620-2628
PMID30013657
show ga
Although osteosarcoma (OS) is the most common type of primary bone tumor in
adolescents and young adults, its mechanism remains unclear. A previous study by
the authors demonstrated that miR-214-3p was upregulated in OS patients.
Therefore, the present study aimed to investigate the effect and molecular
mechanism of miR-214-3p in OS cells. OS cell lines, U2OS and MNNG/HOS Cl#5, were
transiently transfected with miR-214-3p mimics, a control mimic, miR-214-3p
inhibitors and a control inhibitor. Subsequent assays revealed that elevated
miR-214-3p promoted the proliferative, migratory and invasive abilities of OS
cells, while the opposite effects were observed in cells that were transfected
with miR-214-3p inhibitors. The interaction between miR-214-3p and cell adhesion
molecule 1 (CADM1) 3'untranslated region (UTR) was verified by a dual luciferase
assay, which indicated that the relative luciferase activity was decreased in
293T cells that were co-transfected with miR-214-3p mimic and
psiCHECK2-CADM1-3'UTR compared with cells that were co-transfected with
psiCHECK2-CADM1-3'UTR and control mimic. The knockdown of CADM1 using
small-interfering RNA enhanced the proliferative, migratory and invasive
abilities of OS cells. Furthermore, downregulated CADM1 expression increased the
expression of phosphorylated P44/42 mitogen activated kinase (MAPK). In
conclusion, miR-214-3p was able to directly target CADM1 and decrease its
expression. This resulted in the activation of the P44/42 MAPK signaling pathway,
and thereby promoted the proliferation, migration and invasion of OS cells.