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"Snorkeling" for missing players in cancer

Riccardo Taulli, Pier Paolo Pandolfi

    The Journal of Clinical Investigation
    |July 4, 2012
    PubMed

    Insights

    Small nucleolar RNAs (snoRNAs) are a new cancer gene class. ACA11, an orphan snoRNA, is overexpressed in multiple myeloma due to a chromosomal translocation, impacting cancer growth and treatment resistance.

    Area of Science:

    • Oncology
    • Molecular Biology
    • Genetics

    Background:

    • Small nucleolar RNAs (snoRNAs) are increasingly recognized as critical regulators in cancer development.
    • Orphan snoRNAs, distinct from those linked to ribosomal proteins, play roles in gene splicing or act as microRNA precursors.
    • Aberrant gene expression is a hallmark of cancer, driving neoplastic progression.

    Discussion:

    • Chu et al. identify ACA11, an orphan snoRNA within the WHSC1 gene, as significantly overexpressed in t(4;14)-positive multiple myeloma (MM).
    • This overexpression is a direct consequence of the chromosomal translocation, a known driver in hematopoietic malignancies.
    • The study links ACA11 to key MM pathobiological features, including cellular growth, chemotherapy resistance, and oxidative stress responses.

    Key Insights:

    • First identification of a snoRNA overexpressed due to a chromosomal translocation in cancer.
    • ACA11's role in multiple myeloma pathogenesis, affecting growth, drug resistance, and oxidative stress.
    • Highlights the significance of orphan snoRNAs in cancer, particularly those driven by chromosomal abnormalities.

    Outlook:

    • Further investigation into ACA11 as a potential therapeutic target in multiple myeloma.
    • Exploring the broader role of snoRNA deregulation in cancers associated with chromosomal translocations.
    • Potential for diagnostic or prognostic biomarkers based on snoRNA expression profiles in hematologic cancers.

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