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2017 ; 8
(6
): e2862
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Long noncoding RNA CRNDE stabilized by hnRNPUL2 accelerates cell proliferation
and migration in colorectal carcinoma via activating Ras/MAPK signaling pathways
#MMPMID28594403
Jiang H
; Wang Y
; Ai M
; Wang H
; Duan Z
; Wang H
; Zhao L
; Yu J
; Ding Y
; Wang S
Cell Death Dis
2017[Jun]; 8
(6
): e2862
PMID28594403
show ga
Recent studies have furthered our understanding of the function of long noncoding
RNAs (lncRNAs) in numerous biological processes, including cancer. This study
investigated the expression of a novel lncRNA, colorectal neoplasia
differentially expressed (CRNDE), in colorectal carcinoma (CRC) tissues and cells
by real-time RT-PCR and in situ hybridization, and its biological function using
a series of in vitro and in vivo experiments to determine its potential as a
prognostic marker and therapeutic target. CRNDE was found to be upregulated in
primary CRC tissues and cells (P<0.05), and the upregulation of CRNDE expression
is a powerful predictor of advanced TNM stage (P<0.05) and poor prognosis for CRC
patients (P=0.002). The promoting effects of CRNDE on the cell proliferation,
cell cycling and metastasis of CRC cells were confirmed both in vitro and in vivo
by gain-of-function and loss-of-function experiments. Mechanistically, it was
demonstrated that CRNDE could form a functional complex with heterogeneous
nuclear ribonucleoprotein U-like 2 protein (hnRNPUL2) and direct the transport of
hnRNPUL2 between the nucleus and cytoplasm. hnRNPUL2 that was accumulated in the
cytoplasm could interact with CRNDE both physically and functionally, increasing
the stability of CRNDE RNA. Moreover, gene expression profile data showed that
CRNDE depletion in cells downregulated a series of genes involved in the
Ras/mitogen-activated protein kinase signaling pathways. Collectively, these
findings provide novel insights into the function and mechanism of lncRNA CRNDE
in the pathogenesis of CRC and highlight its potential as a therapeutic target
for CRC intervention.