Medicinal Chemistry - Fusion of Traditional and Western Medicine, First Edition


Robert E. Smith

DOI: 10.2174/97816080514961130101
eISBN: 978-1-60805-149-6, 2013
ISBN: 978-1-60805-154-0

Indexed in: Scopus, EBSCO.

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Drugs that Act on Microtubules

- Pp. 324-328 (5)

Robert E. Smith


Microtubules are also possible targets for therapy. They participate in many cellular processes, including transport and cell division. There are two classes of microtubule drugs, microtubule inhibitors (vincristine and vinblastine, which are alkaloids from the Madagascar periwinkle, also known as the Catharanthus roseus, and once known as Vinca rosa), approved by the FDA in 1963 and 1965, and stabilizers Taxol (Paclitaxel) and Taxotere (Docatexel) approved in 1992, and 1996, respectively. Also, there are two semi-synthetic derivatives of vincristine, called vindesine and vinorelbine, which are also microtubule inhibitors. Another class of microtubule-acting anticancer drugs contains the epothilones. Epothilones A and B are naturally occurring 16-membered macrolides, which are produced by the myxobacterium Myxococcus xanthus or Sorangium cellulosum. Another natural product that acts on tubulin is called eribulin. It was isolated from the Pacific sponge and it inhibits the polymerization of tubulin. The root bark of the Combretum caffrum tree is the source of combretastatin, which another natural inhibitor of tubulin polymerization. Another drug that binds to microtubules is called Maytansine. It disrupts microtubule assembly.

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