Updated: 8/22/2019

Microtubule Inhibitors

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Topic
Vinca Alkaloids (Vincristine and Vinblastine)
  • Mechanism 
    • block microtubule formation 
      • bind to tubulin in M phase
      • prevent polymerization of microtubules
      • prevent formation of mitotic spindle
  • Clinical use
    • Hodgkin's lymphoma
      • part of the MOPP regimen
        • M = mustargen
        • O = oncovin = vincristine brand name
        • Procarbazine
        • Prednisone
    • Wilms' tumor
    • choriocarcinoma
    • ALL
    • testicular cancer
    • Kaposi's sarcoma
  • Toxicity
    • vincristine
      • neurotoxicity
        • areflexia
        • peripheral neuritis
        • paralytic ileus
    • vinblastine
      • myelosuppression
Taxols (Paclitaxel)
  • Mechanism
    • block microtubule breakdown 
      • hyperstabilize microtubules in M phase
      • mitotic spindle cannot break down
      • anaphase cannot occur
  • Clinical use
    • ovarian cancer
    • breast cancer
  • Toxicity 
    • peripheral neuropathy
    • myelosuppression
    • hypersensitivity
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