Abstract：
:Glioma is among the most fatal brain tumors characterized by a highly malignancy and rapid progression and early metastasis. Dysregulation of long non-coding RNA differentiation antagonizing non-protein coding RNA (LncRNA DANCR) is associated with the development, progression and metastasis of various cancers. In the present study, we investigated functional role of LncRNA DANCR in the malignancy of glioma. The results showed that LncRNA DANCR was increased in glioma tissues and cells compared with normal brain tissues and cells. DANCR expression was positively correlated with the malignancy and poor prognosis of glioma patients. DANCR contained a binding site of miR-33a-5p. miR-33a-5p was decreased in glioma tissues and cells compared with normal brain tissues and cells. Downregulation of miR-33a-5p was positively correlated with the malignancy and poor prognosis of glioma patients. In glioma tissues, the expression of DANCR was negatively correlated with the expression of miR-33a-5p. Downregulation of DANCR increased miR-33a-5p expression. miR-33a-5p mimic reduced the luciferase of DANCR-WT but not DANCR-MUT. DANCR pull-down showed the expression of miR-33a-5p. miR-33a-5p mimic enhanced knockdown of DANCR -induced inhibition of cell proliferation, migration, and EMT, and increase of apoptosis. Anti-miR-33a-5p reversed the effects of si- DANCR on cell malignancy. Knockdown of DANCR remarkably reduced the increase of tumor volumes in xenograft mouse models. In tumor tissues, knockdown of DANCR increased the expression of miR-33a-5p, reduced EMT and increased apoptosis. Our study provides novel insights in the functions of LncRNA DANCR-miR-33a-5p axis in tumorigenesis of glioma.
journal_name
Neoplasmajournal_title
Neoplasmaauthors
Yang JX,Sun Y,Gao L,Meng Q,Yang BYdoi
10.4149/neo_2018_170724N498subject
Has Abstractpub_date
2018-09-19 00:00:00pages
790-798issue
5eissn
0028-2685issn
1338-4317pii
170724N498journal_volume
65pub_type
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