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2017 ; 51
(6
): 1722-1730
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Long non-coding RNA CASC15 is upregulated in hepatocellular carcinoma and
facilitates hepatocarcinogenesis
#MMPMID29075788
He T
; Zhang L
; Kong Y
; Huang Y
; Zhang Y
; Zhou D
; Zhou X
; Yan Y
; Zhang L
; Lu S
; Zhou J
; Wang W
Int J Oncol
2017[Dec]; 51
(6
): 1722-1730
PMID29075788
show ga
Hepatocellular carcinoma (HCC) is the most common type of primary liver cancer,
accounting for one-sixth of all malignant tumors, and the mortality rate of HCC
ranks second among all cancer-related deaths. Increasing evidence has recently
shown that long non-coding RNAs (lncRNAs) play an important role in cancer
occurrence and progression, including HCC. Cancer susceptibility candidate 15
(CASC15), a lncRNA, has been reported to be involved in melanoma progression and
phenotype switching. However, the function of CASC15 in human HCC is still
unknown. In the present study, we evaluated expression of CASC15 and its
potential functions in HCC. The expression of CASC15 in HCC tissues was
quantitated by the reverse-transcription quantitative polymerase chain reaction,
which showed that CASC15 was overexpressed in 59% (48/82) of HCC tissues compared
with corresponding adjacent normal tissues, and the CASC15 expression level was
significantly correlated with metastasis (P=0.012), tumor size (P=0.037), and TNM
stage (P=0.013). Kaplan-Meier survival curves showed that high CASC15 expression
was associated with poor prognosis in HCC patients (P<0.05). Moreover, a
knockdown model of CASC15 was established, which showed that CASC15 significantly
impaired HCC cell proliferation, migration, and invasion. CASC15 knockdown also
induced cell apoptosis in vitro and impaired tumor growth in vivo. In conclusion,
CASC15 plays an important role in the progression of HCC, acting as an oncogene.
High expression of CASC15 is correlated with a poor prognosis, suggesting that
CASC15 may be a predictive biomarker of HCC.