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2018 ; 24
(ä): 1794-1801
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Long Noncoding RNA Metastasis-Associated Lung Adenocarcinoma Transcript 1
(MALAT1) Promotes Renal Cell Carcinoma Progression via Sponging miRNA-429
#MMPMID29588438
Jiang LT
; Wan CH
; Guo QH
; Yang SJ
; Wu JD
; Cai J
Med Sci Monit
2018[Mar]; 24
(ä): 1794-1801
PMID29588438
show ga
BACKGROUND: It is well known that long noncoding RNA (lncRNA)
metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is closely
correlated with the tumorigenesis of multiple cancers, including renal cell
carcinoma (RCC). However, the potential functional mechanism is still elusive.
MATERIAL/METHODS: In our present research, quantitative real-time polymerase
chain reaction (qRT-PCR) was performed for the measurement of MALAT1 and miR-429.
CCK-8 assay and Transwell assay were performed for the proliferation, migration,
and invasion abilities of RCC cells. Dual-luciferase reporter assay was performed
to validate the interaction within MALAT1 and miR-429. RESULTS: Data found that
MALAT1 was overexpressed in RCC clinical samples and cell lines. Moreover,
loss-of-functional experiments showed that MALAT1 knockdown suppress the
proliferation, migration, and invasion abilities of RCC cells. RT-PCR showed that
miR-429 expression was downregulated in RCC cell lines, which was negatively
correlated with that of MALAT1. Bioinformatics analysis suggested that miR-429
had complementary binding sequences with MALAT1, which was confirmed by
dual-luciferase reporter assay. CONCLUSIONS: In summary, our results concluded
that MALAT1 functioned as an oncogene in RCC by sponging miR-429, acting as its
competing endogenous RNA (ceRNA).