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Decrease of lncRNA MEG3 in Acute Myeloid Leukemia Affected the Expression of p53 and MDM2.

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    Down-regulation of long non-coding RNA maternally expressed gene 3 (lncRNA MEG3) is linked to acute myeloid leukemia (AML) progression. Restoring lncRNA MEG3 inhibits cancer cell growth and promotes apoptosis.

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    Area of Science:

    • Molecular Biology
    • Oncology
    • Gene Expression

    Background:

    • Investigating the clinical significance of long non-coding RNA maternally expressed gene 3 (lncRNA MEG3) in adult acute myeloid leukemia (AML).
    • Understanding the role of non-coding RNAs in hematological malignancies.

    Purpose of the Study:

    • To determine the clinical role of lncRNA MEG3 in adult AML.
    • To analyze the correlation between lncRNA MEG3 expression and AML patient outcomes.
    • To elucidate the functional impact of lncRNA MEG3 on AML cell behavior.

    Main Methods:

    • Quantitative PCR (qPCR) to measure lncRNA MEG3 expression in bone marrow samples from AML patients and healthy donors.
    • Correlation analysis between lncRNA MEG3 levels and clinical features.
    • MTT and flow cytometry assays to assess cell viability and apoptosis in AML cell lines.
    • Western blot analysis to evaluate the expression of key proteins (caspase-9, Bcl-2, MDM2, p53).

    Main Results:

    • lncRNA MEG3 expression was significantly down-regulated in AML patients compared to healthy donors.
    • Lower lncRNA MEG3 levels correlated with poorer overall survival in AML patients.
    • Upregulation of lncRNA MEG3 inhibited AML cell growth, promoted apoptosis, increased caspase-9 and p53 expression, and decreased Bcl-2 and MDM2 expression.

    Conclusions:

    • Down-regulation of lncRNA MEG3 may contribute to tumor progression in AML.
    • lncRNA MEG3 influences AML cell viability and apoptosis, potentially through the p53-MDM2 pathway.
    • lncRNA MEG3 represents a potential therapeutic target or biomarker in AML.