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Targeting mitotic exit for cancer treatment

Ralph Wäsch

    Expert Opinion on Therapeutic Targets
    |April 12, 2011
    PubMed

    Insights

    Targeting cancer cell mitotic exit by blocking anaphase-promoting complex or cyclosome (APC/C) activity is more effective than disrupting spindle assembly. This approach overcomes cancer cell survival via mitotic slippage in SAC-deficient tumors.

    Area of Science:

    • Oncology
    • Cell Biology
    • Molecular Biology

    Background:

    • Chemotherapeutic drugs targeting the mitotic spindle can be ineffective against SAC-deficient cancer cells, which survive through mitotic slippage.
    • The spindle assembly checkpoint (SAC) normally inhibits the anaphase-promoting complex or cyclosome (APC/C) to prevent mitotic exit, stabilizing key proteins like cyclin B.
    • Mitotic slippage can occur if residual APC/C activity allows for slow degradation of these proteins, enabling cancer cell survival.

    Discussion:

    • Blocking APC/C activity directly targets mitotic exit, a critical process for cell division.
    • This strategy bypasses the complexities of the spindle assembly checkpoint (SAC) and its potential deficiencies in cancer cells.
    • Recent preclinical evidence supports the efficacy of targeting APC/C activity over traditional spindle-disrupting agents.

    Key Insights:

    • Targeting mitotic exit by inhibiting APC/C is a promising therapeutic strategy for cancer treatment.
    • This approach offers an alternative to overcome resistance mechanisms like mitotic slippage in SAC-deficient cancers.
    • Blocking APC/C activity represents a more efficient therapeutic avenue compared to interfering with mitotic spindle assembly.

    Outlook:

    • Further investigation into APC/C inhibitors is warranted to develop novel anti-cancer therapies.
    • Understanding the interplay between SAC, APC/C, and mitotic slippage can reveal new therapeutic targets.
    • Clinical translation of APC/C-targeting strategies could significantly improve outcomes for patients with resistant cancers.

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