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2015 ; 8
(8
): 9052-61
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Macrophage infiltration promotes invasiveness of breast cancer cells via
activating long non-coding RNA UCA1
#MMPMID26464647
Chen S
; Shao C
; Xu M
; Ji J
; Xie Y
; Lei Y
; Wang X
Int J Clin Exp Pathol
2015[]; 8
(8
): 9052-61
PMID26464647
show ga
There is now considerable evidence supporting the view that macrophage
infiltration is playing a critical role in the proliferation and progression of
breast cancer but the underlying molecular mechanisms remain largely unknown. To
this end, using long non-coding RNA (lncRNA) expression profiling, we examined
changes in lncRNA expression in breast cancer cells treated with conditioned
medium (CM) from cultured human THP-1 macrophages. We found that treatment with
macrophage CM induced the expression of numerous lncRNAs, including urothelial
cancer associated 1 (UCA1). Knockdown of UCA1 using shRNA inhibited AKT
phosphorylation and abolished invasiveness of tumor cells induced by macrophage
CM. Consistent with these results; we further showed that UCA1 level was
significantly enhanced in human primary breast tumors and correlated with
advanced clinical stage, supporting its role in promoting carcinogenesis and
progression of breast cancer. Together, these results suggest that macrophage
could promote invasiveness of breast cancer cells by enhancing expression of
lncRNA UCA1.