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Tubulin-targeting agents in hybrid drugs
1School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland.
Abstract:
The targeting of tubulin is an important mechanism for cancer chemotherapy. However, limitations such as resistance, toxicity and incomplete tumour elimination associated with individual anti-cancer drugs have led to a need for combination therapy in cancer. It is therefore relevant to ask whether two or more drugs might be combined in a single hybrid molecule to advantageous effect. This review provides an overview of the hybrid drugs thus far investigated, in which at least one component targets tubulin. The rationale behind this approach is that the hybrid drug may have activity enhanced above and beyond that of the equivalent drug combination, or have an otherwise improved clinical outcome. Particular emphasis is placed on the investigation of activity in multidrug-resistant cancer cell lines. Attention is drawn to the difficulties encountered when developing hybrid drugs, with respect to in vivo metabolism-tracking, increased molecular bulk, and optimisation of the drug dosage ratio. The actual and potential advantages and disadvantages of such hybrid drugs when compared to single drugs or drug combinations are discussed critically and promising directions for future research is highlighted.
Insights
Hybrid drugs combining anti-cancer agents offer a promising approach to overcome drug resistance and improve treatment efficacy. This review explores tubulin-targeting hybrid molecules for enhanced cancer chemotherapy.
Area of Science:
- Oncology
- Pharmacology
- Medicinal Chemistry
Background:
- Tubulin-targeting agents are crucial in cancer chemotherapy.
- Limitations of single agents necessitate combination therapies.
- Developing hybrid molecules offers potential advantages over traditional combinations.
Purpose of the Study:
- To review hybrid drugs where at least one component targets tubulin.
- To evaluate the rationale and potential benefits of such hybrid molecules.
- To highlight challenges and future directions in hybrid drug development.
Main Methods:
- Literature review of existing tubulin-targeting hybrid drugs.
- Analysis of studies investigating activity in multidrug-resistant cancer cell lines.
- Critical discussion of advantages and disadvantages compared to single agents or combinations.
Main Results:
- Hybrid drugs may offer enhanced activity beyond equivalent combinations.
- Investigation focused on overcoming multidrug resistance.
- Challenges include in vivo metabolism, molecular size, and dosage optimization.
Conclusions:
- Hybrid drugs targeting tubulin represent a novel strategy in cancer chemotherapy.
- Potential for improved clinical outcomes and overcoming resistance exists.
- Further research is needed to address development challenges and optimize therapeutic potential.
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