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CircEIF4G2 Promotes Tumorigenesis and Progression of Osteosarcoma by Sponging miR-218

Erhu Lin1, Shuai Liu2, Wei Xiang2

  • 1Spinal Surgery Department, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, China.

Biomed Research International
|June 30, 2020
PubMed

Insights

This study identifies circEIF4G2 as a novel circular RNA upregulated in osteosarcoma (OS). Knockdown of circEIF4G2 suppressed tumor progression by interacting with miR-218, suggesting its potential as an OS biomarker.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Circular RNAs (circRNAs) are implicated in human cancer development, including osteosarcoma (OS).
  • The precise molecular mechanisms driving OS progression remain incompletely understood.
  • Identifying novel regulatory elements is crucial for understanding OS pathogenesis.

Purpose of the Study:

  • To investigate the role of a novel circRNA, circEIF4G2, in osteosarcoma.
  • To elucidate the molecular mechanisms by which circEIF4G2 influences OS progression.
  • To evaluate circEIF4G2 as a potential diagnostic biomarker for osteosarcoma.

Main Methods:

  • Differential expression analysis of circEIF4G2 in OS tissues and cells.
  • Construction of a circEIF4G2-mediated competing endogenous RNA (ceRNA) network.
  • Loss-of-function experiments (siRNA-mediated knockdown) to assess circEIF4G2's impact on OS cells.
  • Mechanistic investigation involving direct binding assays between circEIF4G2 and miR-218.

Main Results:

  • circEIF4G2 was found to be significantly upregulated in osteosarcoma tissues and cell lines.
  • circEIF4G2 knockdown markedly inhibited osteosarcoma cell proliferation, migration, and invasion.
  • circEIF4G2 was demonstrated to directly bind to miR-218, with miR-218 mediating circEIF4G2's effects on OS progression.
  • circEIF4G2 participates in regulating key cancer pathways, including EGFR, PI3K-Akt, and ErbB signaling.

Conclusions:

  • circEIF4G2 plays a significant role in promoting osteosarcoma progression.
  • The circEIF4G2/miR-218 axis is a key regulatory mechanism in osteosarcoma.
  • circEIF4G2 holds promise as a potential biomarker for osteosarcoma diagnosis and prognosis.

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