胶质瘤
癌症研究
Wnt信号通路
生物
长非编码RNA
肿瘤进展
细胞凋亡
反义RNA
细胞生长
连环素
细胞生物学
核糖核酸
分子生物学
信号转导
癌症
基因
遗传学
作者
Jie Sheng,Xin He,Wei Yu,Yingxi Chen,Yuxiang Long,Kejian Wang,Shaojun Zhu
标识
DOI:10.1016/j.canlet.2020.12.039
摘要
Glioma is the most prevalent intracranial tumour, with considerable morbidity. Long non-coding RNAs are important in the biological processes of various cancers. However, little is known about ST7 antisense RNA 1 (ST7-AS1) and its role in glioma progression. ST7-AS1 expression was reduced in glioma tissues and cells in comparison to normal brain tissues. p53 transcriptionally targeted the ST7-AS1 promoter in U251 glioma cells. The targeting significantly inhibited cell migration, invasion, and proliferation, and promoted apoptosis. ST7-AS1 directly bound to and downregulated polypyrimidine tract-binding protein 1 (PTBP1) at the post-transcriptional level. ST7-AS1 overexpression inhibited glioma progression by suppressing Wnt/β-catenin signalling by downregulating PTBP1 expression. Additionally, p53 expression negatively correlated with PTBP1 expression. Glioma progression is regulated by a positive feedback loop involving the p53/ST7-AS1/PTBP1 axis, which might be a promising therapeutic target for glioma treatment.
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