Cited by 384Microtubule and mitosis dynamicsCancer Treatment and PharmacologySynthesis and biological activity

Taxanes: Microtubule and Centrosome Targets, and Cell Cycle Dependent Mechanisms of Action

Abal, M., Andreu, J., Barasoain, I.·2003·Current Cancer Drug Targets

Abstract

Microtubules are highly dynamic cellular polymers made of alphabeta-tubulin and associated proteins. They play a key role during mitosis, participating in the exact organization and function of the spindle, and are critical for assuring the integrity of the segregated DNA. Therefore, they represent one of the more effective targets in current cancer therapy. Paclitaxel (Taxol) is the prototype of the taxane family of antitumor drugs, and it was the first natural product shown to stabilize microtubules. This unique mechanism of action is in contrast to other microtubule poisons, such as Vinca alkaloids, colchicine, and cryptophycines, which inhibit tubulin polymerization. Taxanes block cell cycle progression through centrosomal impairment, induction of abnormal spindles and suppression of spindle microtubule dynamics. Triggering of apoptosis by aberrant mitosis or by subsequent multinucleated G1-like state related to mitotic slippage, depends on cell type and drug schedule. The development of fluorescent derivatives of paclitaxel led us to locate spindle pole microtubules and centrosomes as main sub-cellular targets of cytotoxic taxoids in living cells. In this review we discuss these findings in the context of a cell cycle-dependent response to taxanes, based on the cellular targets, and the status of the implicated cell cycle checkpoints. We also review those events that can influence this response, like the different signal transduction pathways activated/inactivated in relation to Bcl-2 phosphorylation and induction of apoptosis, and the controversial role of the p53 status on cell sensitivity to paclitaxel. Finally, cell cycle-dependent resistance, an emerging concept in combination sequential chemotherapy, is discussed on the basis of the cell cycle-dependent mechanisms of action of taxanes.

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Crossref · 10.2174/1568009033481967

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Authors
Abal, M., Andreu, J., & Barasoain, I.
Affiliations
Centre National de la Recherche Scientifique (FR)
Venue
Current Cancer Drug Targets
Published
2003-06-01
Volume
3
Issue
3
Pages
193-203
ISSN
1568-0096 (ISSN-L)
OpenAlex
W2164778107
Cited by
383
References
0
Citations by year
2026: 7 · 2025: 14 · 2024: 18 · 2023: 21 · 2022: 22 · 2021: 22 · 2020: 14 · 2019: 19 · 2018: 22 · 2017: 21 · 2016: 23 · 2015: 11 · 2014: 22 · 2013: 14 · 2012: 16
FWCI
5.35
Type
journal article
Language
en
Open access
closed
Locations
  • Current Cancer Drug Targets (publishedVersion)
  • PubMed (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion)
Funders
Fundación Científica Asociación Española Contra el Cáncer
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
  • Health Sciences › Medicine › Oncology › Cancer Treatment and Pharmacology
  • Physical Sciences › Chemistry › Organic Chemistry › Synthesis and biological activity
Keywords
taxanes, paclitaxel, microtubules, centrosome, spindle microtubules, mitosis, mitotic slippage, apoptosis, Bcl-2 phosphorylation, p53, taxane resistance, cell cycle checkpoints, antimitotic agents
MeSH terms
Animals, Cell Cycle, Humans, Microtubules, Drug Delivery Systems, Paclitaxel, Centrosome

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