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Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions
Published on: October 10, 2016
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Stabilized Polymer Micelles for the Development of IT-147, an Epothilone D Drug-Loaded Formulation
Adam Carie1, Bradford Sullivan1, Tyler Ellis1
1Intezyne Technologies, 3720 Spectrum Blvd. Ste. 104, Tampa, FL, USA.
Journal of Drug Delivery
|January 4, 2017
Summary
Epothilone D shows cancer-fighting potential but has safety issues. Encapsulating it in polymer micelles (IT-147) improves drug delivery, enhancing efficacy and reducing toxicity for better cancer treatment.
Area of Science:
- Oncology
- Nanotechnology
- Drug Delivery
Background:
- Epothilones, like Epothilone D, are potent microtubule-stabilizing agents with anticancer activity.
- Clinical trials of Epothilone D were halted due to dose-limiting toxicities and poor plasma stability.
- Encapsulation in nanocarriers offers a strategy to improve Epothilone D's therapeutic index.
Purpose of the Study:
- To develop a novel formulation of Epothilone D using stabilized polymer micelles.
- To enhance the safety and efficacy of Epothilone D through improved drug delivery.
- To create a formulation (IT-147) that increases tumor accumulation and reduces systemic toxicity.
Main Methods:
- Designed and synthesized a library of triblock copolymers for micelle formulation.
- Characterized the Epothilone D-loaded micelles (IT-147) for size, drug loading, and release kinetics.
- Evaluated the pharmacokinetic profile and toxicity of IT-147 compared to free Epothilone D in preclinical models.
Main Results:
- IT-147 achieved high drug loading efficiency (>90%) and a particle size of 75 nm.
- The formulation demonstrated pH-dependent release of Epothilone D.
- IT-147 significantly increased Epothilone D plasma exposure (6-fold) and exhibited a higher no-observed-adverse-effect level (NOAEL) compared to the free drug.
Conclusions:
- Stabilized polymer micelles (IT-147) represent a promising platform for delivering Epothilone D.
- IT-147 enhances Epothilone D's pharmacokinetic profile and safety, potentially overcoming previous clinical limitations.
- This formulation offers a safer and more effective approach for Epothilone D-based cancer therapy.
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