Down-regulation of circular RNA hsa_circ_0007534 suppresses cell growth by regulating miR-219a-5p/SOX5 axis in osteosarcoma.
J Bone Oncol
; 27: 100349, 2021 Apr.
Article
en En
| MEDLINE
| ID: mdl-33552887
INTRODUCTION: Circular RNA circ_0007534 and microRNA-219a (miR-219a-5p) were reported to be involved in osteosarcoma (OS) development. Osteosarcoma (OS) is one of the most common malignant bone tumors, which was more prone to occur in the metaphysis of long bones, including distal femur and proximal tibia. However, the detailed mechanisms were not fully clear. The purpose of this research was to reveal the functional mechanisms of circ_0007534 and miR-219a-5p in OS. METHODS: The levels of genes were determined by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot assay. Cell proliferation ability was detected by cell counting kit-8 (CCK-8) and colony formation assay. Cell migration and invasion abilities were measured using the transwell assay. Furthermore, the interaction between miR-219a-5p and circ_0007534 or SRY (sex-determining region Y)-box 5 (SOX5) was predicted by starbaseV3.0, and confirmed by the dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. Besides, tumor xenograft experiment was performed to analyze the effect of circ_0007534 depletion on tumor growth in vivo. RESULTS: The levels of circ_0007534 and SOX5 were increased, while the miR-219a-5p level was decreased in OS tissues and cells. Circ_0007534 knockdown repressed the proliferation, colony formation, migration, and invasion in OS cells. Circ_0007534 targeted miR-219a-5p, and miR-219a-5p interacted with SOX5. Furthermore, circ_0007534 regulated the growth of OS cells through modulating the levels of miR-219a-5p and SOX5. CONCLUSION: Our finding demonstrated that circ_0007534 knockdown suppressed the growth of OS cells via regulating miR-219a-5p/SOX5 axis, providing a potential target for OS treatment and diagnosis.
ATCC, American Type Culture Collection; CCK-8, cell counting kit-8; Circ_0007534; EMT, epithelial mesenchymal transformation; EZH2, zeste homolog 2; OS, osteosarcoma; Osteosarcoma; PAGE, polyacrylamide gel electrophoresis; PVDF, polyvinylidene difluoride; RIP, RNA immunoprecipitation; SD, standard deviation; SOX5; UTR, untranslated region; hFOB1.19, human osteoblast cell line; mRNA, message RNA; miR-219a-5p; qRT-PCR, quantitative real-time polymerase chain reaction
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
J Bone Oncol
Año:
2021
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Países Bajos