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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2015 ; 290
(11
): 6857-67
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Long non-coding RNAs (LncRNA) regulated by transforming growth factor (TGF) ?:
LncRNA-hit-mediated TGF?-induced epithelial to mesenchymal transition in mammary
epithelia
#MMPMID25605728
Richards EJ
; Zhang G
; Li ZP
; Permuth-Wey J
; Challa S
; Li Y
; Kong W
; Dan S
; Bui MM
; Coppola D
; Mao WM
; Sellers TA
; Cheng JQ
J Biol Chem
2015[Mar]; 290
(11
): 6857-67
PMID25605728
show ga
Long noncoding RNAs (lncRNAs) are emerging as key regulators in various
biological processes. Epithelial-to-mesenchymal transition (EMT) is a
developmental process hijacked by tumor cells to depart from the primary tumor
site, invade surrounding tissue, and establish distant metastases. Transforming
growth factor ? (TGF?) signaling has been shown to be a major inducer of EMT and
to facilitate breast cancer metastasis. However, the role of lncRNAs in this
process remains largely unknown. Here we report a genome-wide lncRNA profile in
mouse mammary epithelial NMuMG cells upon TGF? induction of EMT. Among 10,802
lncRNAs profiled, over 600 were up-regulated and down-regulated during the EMT,
respectively. Furthermore, we identify that lncRNA-HIT (HOXA transcript induced
by TGF?) mediates TGF? function, i.e. depletion of lncRNA-HIT inhibits
TGF?-induced migration, invasion, and EMT in NMuMG. LncRNA-HIT is also
significantly elevated in the highly metastatic 4T1 cells. Knockdown of
lncRNA-HIT in 4T1 results in decrease of cell migration, invasion, tumor growth,
and metastasis. E-cadherin was identified as a major target of lncRNA-HIT.
Moreover, lncRNA-HIT is conserved in humans and elevated expression associates
with more invasive human primary breast carcinoma. Collectively, these data
suggest that a subset of lncRNAs such as lncRNA-HIT play a significant role in
regulation of EMT and breast cancer invasion and metastasis, and could be
potential therapeutic targets in breast cancers.