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2015 ; 8
(5
): 5017-25
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MicroRNA-204 targets JAK2 in breast cancer and induces cell apoptosis through the
STAT3/BCl-2/survivin pathway
#MMPMID26191195
Wang X
; Qiu W
; Zhang G
; Xu S
; Gao Q
; Yang Z
Int J Clin Exp Pathol
2015[]; 8
(5
): 5017-25
PMID26191195
show ga
MicroRNAs (miRNAs) have emerged as important regulators that potentially play
critical roles in cancer cell biological processes. Previous studies have shown
that miR-204 plays an important role in various human cancers. However, the
underlying mechanisms of this microRNA in breast cancer remain largely unknown.
In the present study, we investigated that miR-204 expression level was markedly
reduced in both the human breast cancer tissue and cultured breast cancer cell
lines (MCF-7, MDA-MB-231). Overexpression of miR-204 inhibited the proliferation
and promoted the apoptosis in breast cancer cells, which were reversed by
co-transfection of miR-204 inhibitor. We validated that Janus kinase 2 (JAK2), as
a direct target of miR-204, is overexpressed in breast cancer. Knockdown of JAK2
suppressed cell viability and induced apoptosis in breast cancer cells. Moreover,
the level of miR-204 is negatively correlated with p-STAT3 and anti-apoptotic
genes BCl-2 and surviving in breast cancer. In conclusions, miR-204 targets JAK2
and suppressed JAK2 and p-JAK2 expression in breast cancer, which further inhibit
the activation of STAT3, BCl-2 and survivin. These findings indicate that
manipulation of miR-204 expression may represent a novel therapeutic strategy in
the treatment of breast cancer.