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2017 ; 17
(1
): 373
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An increase in long non-coding RNA PANDAR is associated with poor prognosis in
clear cell renal cell carcinoma
#MMPMID28545465
Xu Y
; Tong Y
; Zhu J
; Lei Z
; Wan L
; Zhu X
; Ye F
; Xie L
BMC Cancer
2017[May]; 17
(1
): 373
PMID28545465
show ga
BACKGROUND: Nearly 30% of clear cell renal cell carcinoma (ccRCC) patients
present with metastasis at the time of diagnosis, and the prognosis for these
patients is poor. Therefore, novel potential prognostic biomarkers and
therapeutic targets for ccRCC could be helpful. Emerging evidence indicates that
lncRNAs play important roles in cancer tumorigenesis and could be used as
potential biomarkers or therapeutic targets. PANDAR (promoter of CDKN1A antisense
DNA damage activated RNA) is a relatively novel lncRNA that plays an important
role in the development of multiple cancers. However, the clinical significance
and molecular mechanism of PANDAR in ccRCC are still elusive. In the present
study, we attempted to elucidate the role of PANDAR in ccRCC. METHODS: The
relative expression level of lncRNA PANDAR was quantified by real-time qPCR in 62
paired ccRCC tissues and in renal cancer cell lines, and its association with
overall survival was assessed by statistical analysis. The biological functions
of lncRNA PANDAR on ccRCC cells were determined both in vitro and in vivo.
RESULTS: PANDAR expression was significantly upregulated in tumor tissues and
cell lines compared with normal counterparts. Moreover, PANDAR served as an
independent predictor of overall survival, and increased PANDAR expression was
positively correlated with an advanced TNM stage. Further experiments
demonstrated that PANDAR silencing can significantly inhibit cell proliferation
and invasion, induce cell cycle arrest in the G1 phase and significantly promote
apoptosis in 7860 and Caki-1 cell lines. In addition, in vivo experiments
confirmed that downregulation of PANDAR inhibited the tumorigenic ability of 7860
cells in nude mice. Silencing of PANDAR also inhibited the expression of Bcl-2
and Mcl-1 and upregulated the expression of Bax in vivo. CONCLUSIONS: Our results
suggest that PANDAR is involved in ccRCC progression and may serve as a potential
prognostic biomarker and therapeutic target.