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Updated: Jul 5, 2026

Live Imaging to Study Microtubule Dynamic Instability in Taxane-resistant Breast Cancers
Published on: February 20, 2017
Ixabepilone: a new microtubule-targeting agent for breast cancer
1Mary Babb Randolph Cancer Center, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA.
Abstract:
Results of clinical trials over the past 15 years demonstrate that the taxanes are among the most effective new class of cytotoxic drugs to treat breast cancer and other solid tumors. Moreover, the efficacy of the taxanes added further credence to the relevance of the microtubule as a tumor target. In spite of the significant benefits observed in early and advanced breast cancer, a number of factors contribute to disease relapse and, perhaps more discouragingly, disease refractoriness. After exhausting cytotoxic chemotherapy, hormonal therapy, and other molecular-based-therapies, patients whose tumors exhibit taxane resistance had virtually no additional options. This paper, a product of the ongoing advances in the treatment of breast cancer, reviews two important areas: first, molecular concepts and relevance of the microtubule in breast cancer and second, clinical implications of ixabepilone, a novel, nontaxane tubulin-stabilizing agent in patients with taxane-resistant breast cancer.
Insights
Taxanes are effective for breast cancer, but resistance limits options. Ixabepilone offers a new treatment for taxane-resistant breast cancer by targeting tubulin.
Area of Science:
- Oncology
- Molecular Biology
Background:
- Taxanes represent a key class of cytotoxic drugs highly effective against breast cancer and solid tumors.
- Microtubules are validated as crucial targets in cancer therapy, underscored by taxane efficacy.
- Taxane resistance and refractoriness present significant challenges in treating advanced breast cancer, leaving patients with limited therapeutic avenues.
Purpose of the Study:
- To review the molecular mechanisms and significance of microtubules in breast cancer.
- To discuss the clinical utility of ixabepilone, a non-taxane agent, in managing taxane-resistant breast cancer.
Main Methods:
- Review of clinical trial data and molecular biology research on taxanes and microtubules.
- Analysis of clinical implications and efficacy of ixabepilone in taxane-resistant patient populations.
Main Results:
- Taxanes demonstrate significant efficacy but are associated with eventual disease relapse and resistance.
- Ixabepilone, a novel tubulin-stabilizing agent, presents a viable therapeutic option for patients with taxane-resistant breast cancer.
Conclusions:
- Understanding microtubule dynamics is crucial for developing novel cancer therapies.
- Ixabepilone offers a promising alternative for patients who have exhausted conventional taxane-based treatments, addressing a critical unmet need in refractory breast cancer.
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