Engineering biodegradable polyester particles with specific drug targeting and drug release properties

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Polymeric micro- and nanoparticles, specifically poly(lactic acid) (PLA) and poly(lactic-co-glycolic acid) (PLGA), are crucial for controlled drug delivery and in vivo localization.
• Recent advancements focus on engineering novel micro- and nanoparticles for enhanced drug release control and targeted delivery.

Purpose of the Study:

• To explore engineering approaches for novel micro- and nanoparticles with improved drug release profiles and targeting capabilities.
• To investigate the manipulation of fabrication and degradation processes for advanced polyester-based drug delivery systems.

Main Methods:

• Utilizing emulsion-solvent extraction techniques for particle fabrication.
• Conjugating polyesters with ligands or other polymers before or after particle formation.
• Designing particle surface and internal porosity for specific delivery criteria.

Main Results:

• Achieved greater control over drug release profiles, including attenuation of burst release.
• Enabled passive targeting (e.g., pulmonary delivery) and active targeting via ligand-receptor interactions.
• Demonstrated the potential for designing particles for cerebral disease treatment and tumor targeting.

Conclusions:

• Polyester microparticles offer advanced applications beyond traditional drug delivery vehicles.
• Engineering strategies allow for precise control over drug release kinetics and targeting specificity.
• Novel applications include pulsatile and time-delayed co-delivery of therapeutics.