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- Title
Hsa_circ_0008344 Promotes Glioma Tumor Progression and Angiogenesis Presumably by Regulating miR-638/SZRD1 Pathway.
- Authors
Deng, Liyong; Gong, Kuiyu; Wang, Guihua
- Abstract
Hsa_circRNA_0008344 (circ_0008344) is a new glioma-related circular RNA. Our study aims to explore its functions in glioma tumor progression. Real-time quantitative PCR and western blotting were used to detect RNA and protein abundances. RNase R assay, actinomycin D assay, and subcellular fractionation method were performed to identify the features of circ_0008344. Cell-counting kit-8, 5-ethynyl-2′-deoxyuridine assays, transwell assays, tube formation assay, flow cytometry, and nude mice xenograft tumor model were performed. Target relationship was predicted by bioinformatics algorithms and confirmed by dual-luciferase reporter assay. Abundances of circ_0008344 and SUZ RNA binding domain containing 1 (SZRD1) were highly elevated, while miR-638 was downregulated in glioma tumors and cells. Circ_0008344 was identified as a stable circRNA with a circular structure. Silencing circ_0008344 could restrain glioma proliferation, migration, invasion, and angiogenesis. Circ_0008344 functioned as a sponge for miR-638. The negative regulation of circ_0008344 knockdown on glioma progression and angiogenesis could be reversed by miR-638 inhibitor. SZRD1 was a target of miR-318, and its overexpression overturned the inhibition effect of miR-638 mimic on glioma progression and angiogenesis. Meanwhile, we confirmed that circ_0008344 knockdown inhibited SZRD1 expression, and its effect was reversed by miR-638 inhibitor. Also, circ_00008344 knockdown suppressed glioma tumor growth. Circ_0008344 might contribute to glioma progression through miR-638/SZRD1 axis, which might be a novel pathology and treatment target in glioma.
- Subjects
GLIOMAS; CANCER invasiveness; CIRCULAR RNA; URIDINE; NEOVASCULARIZATION; SUBCELLULAR fractionation; TUMOR growth
- Publication
Neurotoxicity Research, 2022, Vol 40, Issue 3, p825
- ISSN
1029-8428
- Publication type
Article
- DOI
10.1007/s12640-022-00504-8