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2015 ; 8
(9
): 10325-34
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Overexpression of histone demethylase JMJD5 promotes metastasis and indicates a
poor prognosis in breast cancer
#MMPMID26617740
Zhao Z
; Sun C
; Li F
; Han J
; Li X
; Song Z
Int J Clin Exp Pathol
2015[]; 8
(9
): 10325-34
PMID26617740
show ga
In this study, we showed the expression of JMJD5 was increased in breast cancer
tissues and breast adenocarcinoma cell lines MCF-7 as well as triple negative
breast cancer cell lines MDA-MB-231 compared with paired adjacent normal mammary
tissues and normal mammary epithelial cell lines MCF-10A. The higher expression
of JMJD5 was significantly corresponded with clinical stage, histological grade
and lymph node metastasis. Overexpression of JMJD5 promoted cell invasion and
induce EMT, while JMJD5 siRNA inhibits MDA-MB-231 cells invasion in vitro.
Moreover, qChIP analysis revealed the Snail family proteins Snai1 was the direct
target of JMJD5 in breast cancer cells. Luciferase reporter assays suggested that
the overexpression of JMJD5 resulted in the activation of Snail1 promoter-driven
luciferase reporter. The changes in the level of RNA and protein implied that the
activation of Snail was the important mechanisms by which JMJD5 triggers
metastasis. We also detected the higher expression of JMJD5 protein was an
independent unfavorable biomarker for worse overall survival in breast cancer
patients. Therefore, our results identified an important role for JMJD5 in breast
cancer through the regulation of snail1.