A simple method to achieve high doxorubicin loading in biodegradable polymersomes.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Doxorubicin (Dox) is a vital anthracycline anticancer agent.
• Developing effective drug delivery systems is crucial for cancer therapy.
• Block copolymer vesicles offer potential for controlled drug release.

Purpose of the Study:

• To incorporate Dox into PTMC-b-PGA vesicles.
• To evaluate the influence of pH on Dox loading and release.
• To assess the stability and release kinetics of Dox-loaded vesicles.

Main Methods:

• Solvent-displacement (nanoprecipitation) method for vesicle formation.
• pH-controlled loading of Dox into PTMC-b-PGA vesicles.
• In vitro assessment of drug loading, vesicle stability, and release profiles.

Main Results:

• High Dox loading capacity (47% w/w) achieved at pH 10.5.
• Stable aqueous dispersions of Dox-loaded vesicles maintained for over 6 months.
• pH and temperature-dependent Dox release observed, with faster release in acidic conditions or higher temperatures.

Conclusions:

• PTMC-b-PGA polymersomes are promising carriers for Dox delivery.
• Controlled Dox release can be achieved by manipulating pH and temperature.
• These vesicles offer a stable and effective platform for targeted cancer therapy.