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  1. Home
  3. Circ_0002669 Promotes Osteosarcoma Tumorigenesis Through Directly Binding To Mycbp And Sponging Mir-889-3p.
  1. Home
  3. Circ_0002669 Promotes Osteosarcoma Tumorigenesis Through Directly Binding To Mycbp And Sponging Mir-889-3p.

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Circ_0002669 promotes osteosarcoma tumorigenesis through directly binding to MYCBP and sponging miR-889-3p.

Ying Zhang1,2, Yizhou Zhan3, Zhaoyong Liu4

  • 1Department of Radiotherapy, Cancer Hospital of Shantou University Medical College, No. 7 Raoping Road, 515041, Shantou, Guangdong, PR China. yzhangmimazi@stu.edu.cn.

Biology Direct
|April 3, 2024

View abstract on PubMed

Summary
This summary is machine-generated.

Circular RNAs (circRNAs) promote osteosarcoma (OS) malignancy. Circ_0002669 protects MYCBP from degradation and blocks miR-889-3p, driving OS cell growth and invasion.

Keywords:
Circ_0002669MYCBPOsteosarcomamiR-889-3p

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Area of Science:

  • Molecular Biology
  • Oncology
  • RNA Biology

Background:

  • Circular RNAs (circRNAs) are key regulators in cancer progression.
  • Osteosarcoma (OS) is a primary bone cancer with significant mortality.
  • Specific circRNAs, like circ_0002669, are implicated in OS development.

Purpose of the Study:

  • To investigate the role of circ_0002669 in osteosarcoma (OS) progression.
  • To elucidate the molecular mechanism by which circ_0002669 influences OS malignancy.
  • To identify potential therapeutic targets for OS treatment.

Main Methods:

  • Quantitative real-time PCR to assess circ_0002669 expression in OS tissues.
  • Biotin pulldown assays and mass spectrometry to identify circ_0002669-binding proteins.
  • Luciferase reporter assays and RNA immunoprecipitation to confirm interactions between circ_0002669, MYCBP, and miR-889-3p.
  • In vivo and in vitro functional assays to evaluate the impact of circ_0002669 on OS cell behavior.

    • Main Results:

    • Circ_0002669 was highly expressed in OS tissues and correlated with poor patient survival.
    • Elevated circ_0002669 promoted OS cell proliferation and invasion.
    • Circ_0002669 directly bound to MYCBP, inhibiting its ubiquitination and proteasomal degradation.
    • Circ_0002669 acted as a miRNA sponge for miR-889-3p, increasing MYCBP expression.
    • MYCBP was identified as a critical mediator of circ_0002669's pro-tumorigenic effects in OS.
    • Circ_0002669 and MYCBP overexpression led to increased expression of c-myc-associated genes (CCND1, c-Jun, CDK4).

    Conclusions:

    • Circ_0002669 promotes osteosarcoma malignancy by stabilizing MYCBP and suppressing miR-889-3p.
    • The circ_0002669/MYCBP axis represents a potential therapeutic target for osteosarcoma.