Functionalized amphiphilic hyperbranched polymers for targeted drug delivery

Area of Science:

• Polymer Chemistry
• Nanotechnology
• Biomedical Engineering

Background:

• Development of targeted drug delivery systems is crucial for improving cancer therapy.
• Hyperbranched polymers offer unique properties for nanoparticle formulation.
• Folate receptor is overexpressed on many tumor cells, making it an attractive target.

Purpose of the Study:

• To synthesize and characterize amphiphilic hyperbranched core-shell polymers functionalized with folate for targeted drug delivery.
• To encapsulate antineoplastic drugs into these nanoparticles.
• To evaluate the in vitro targeting and efficacy of the drug-loaded nanoparticles.

Main Methods:

• Synthesis of amphiphilic hyperbranched core-shell polymers with poly(epsilon-caprolactone) and poly(ethylene glycol) segments.
• Functionalization of polymer surface with folic acid.
• Nanoparticle preparation via dialysis and characterization using TEM and particle size analysis.
• Encapsulation of 5-fluorouracil and paclitaxel.
• In vitro drug release studies and cellular targeting assays.

Main Results:

• Successful synthesis and characterization of folate-functionalized amphiphilic hyperbranched polymers.
• Formation of stable nanoparticles with encapsulated drugs.
• Demonstrated enhanced cellular uptake and cytotoxicity of drug-loaded nanoparticles in folate receptor-expressing tumor cells.
• Folate targeting significantly increased the efficacy of the encapsulated antineoplastic drugs.

Conclusions:

• Amphiphilic hyperbranched core-shell polymers functionalized with folate are effective carriers for targeted cancer therapy.
• Folate-mediated targeting enhances the delivery and efficacy of encapsulated anticancer drugs.
• These targeted nanoparticles represent a promising strategy for improving the treatment of folate receptor-positive tumors.