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MEG3 long non-coding RNA prevents cell growth and metastasis of osteosarcoma

S Z Zhang, L Cai, B Li

    Bratislavske Lekarske Listy
    |December 5, 2017
    PubMed
    Abstract

    Insights

    Long non-coding RNA MEG3 (lncRNA MEG3) is downregulated in osteosarcoma (OS). Overexpressing MEG3 inhibits OS cell proliferation and metastasis by suppressing Notch and TGF-β signaling pathways.

    Area of Science:

    • Molecular Biology
    • Oncology
    • Genetics

    Background:

    • Osteosarcoma (OS) is a primary bone malignancy with significant metastatic potential.
    • Long non-coding RNAs (lncRNAs) play crucial roles in various cellular processes, including cancer development.
    • The specific role of lncRNA MEG3 in OS pathogenesis requires further elucidation.

    Purpose of the Study:

    • To investigate the role of lncRNA MEG3 in osteosarcoma.
    • To explore the underlying molecular mechanisms by which MEG3 influences OS cell behavior.
    • To assess the therapeutic potential of MEG3 in OS treatment.

    Main Methods:

    • Quantitative real-time PCR (qRT-PCR) to determine MEG3 expression levels in OS cell lines and normal osteoblasts.
    • Lentiviral vector (LV-MEG3) mediated overexpression of MEG3 in OS cells.
    • MTT and colony-formation assays to evaluate cell proliferation.
    • Cell migration assays to assess metastatic potential.
    • Western blot analysis to determine the expression of key signaling molecules (Notch1, Hes1, TGF-β, N-cadherin, E-cadherin).

    Main Results:

    • MEG3 expression was significantly downregulated in OS cell lines (MG63, U2OS) compared to normal osteoblasts (hFOB1.19).
    • Overexpression of MEG3 in MG63 cells via LV-MEG3 significantly inhibited cell proliferation and migration.
    • MEG3 overexpression markedly suppressed the expression of Notch1, Hes1, TGF-β, and N-cadherin, while increasing E-cadherin expression.

    Conclusions:

    • lncRNA MEG3 acts as a tumor suppressor in osteosarcoma.
    • MEG3 inhibits OS cell growth and metastasis by repressing the Notch and TGF-β signaling pathways.
    • MEG3 represents a potential therapeutic target for osteosarcoma treatment.
    Keywords:
    cell growth metastasis.lncRNA MEG3osteosarcoma

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