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2018 ; 17
(1
): 72
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Linc00659, a long noncoding RNA, acts as novel oncogene in regulating cancer cell
growth in colorectal cancer
#MMPMID29523145
Tsai KW
; Lo YH
; Liu H
; Yeh CY
; Chen YZ
; Hsu CW
; Chen WS
; Wang JH
Mol Cancer
2018[Mar]; 17
(1
): 72
PMID29523145
show ga
BACKGROUND: Colorectal cancer (CRC) is one of the most common cancers and causes
of cancer-related death worldwide. In patients with CRC, metastasis is a crucial
problem that leads to treatment failure and is the primary cause of the lethality
of colon cancer. Long noncoding RNAs (lncRNAs) have recently emerged as critical
molecules in the development, cell growth, apoptosis, and metastasis of CRC.
METHOD: We investigated the transcriptome profiles of human lncRNAs in the
primary tumor tissues and in the corresponding normal mucosa of two patients with
CRC by using a microarray approach. The expression levels of lncRNAs were
verified in colon cancer by real-time PCR. Using bioinformatics approach to
illustrate putative biological function of Linc00659 in colon cancer. The effects
of Linc00659 on cell growth, proliferation, cell cycle and apoptosis were studies
by in vitro assays. RESULTS: Our data revealed that compared with adjacent normal
tissues, 201 lncRNAs were deregulated (fold change ??4 or ??0.25) in CRC tissues.
Among them, the expression levels of Linc00659 were significantly increased in
colon cancer, and high expression levels were correlated with poor survival in
patients with CRC. Bioinformatics analysis results indicated that Linc00659 was
significantly coexpressed with cycle-related genes in CRC. Linc00659 expression
knockdown could significantly suppress colon cancer cell growth by impairing cell
cycle progression. In addition, our results showed that Linc00659 expression
knockdown could accelerate cell apoptosis in colon cancer cells treated with
chemotherapy drugs. Meanwhile, our results also demonstrated that silencing of
Linc00659 expression leads to cell growth inhibition and induced apoptosis,
possibly by suppressing PI3K-AKT signaling in colon cancer. CONCLUSION: Linc00659
is a novel oncogenic lncRNA involved in colon cancer cell growth by modulating
the cell cycle. Our findings give an insight into lncRNA regulation and provide
an application for colon cancer therapy.