Hyperbranched amphiphilic polymer with folate mediated targeting property

Area of Science:

• Polymer Chemistry
• Nanotechnology
• Biomedical Engineering

Background:

• Development of advanced drug delivery systems is crucial for improving cancer therapy.
• Targeted delivery can enhance therapeutic efficacy and reduce systemic toxicity of chemotherapeutics.
• Hyperbranched polymers offer unique properties for nanocarrier construction.

Purpose of the Study:

• To synthesize and characterize a novel hyperbranched amphiphilic polymer, PG6-PLA-PEG-FA, for targeted drug delivery.
• To encapsulate the antineoplastic drug paclitaxel (PTX) into self-assembled nanoparticles.
• To evaluate the in vitro targeting efficiency and efficacy of the drug-loaded nanoparticles against folate receptor-positive tumor cells.

Main Methods:

• Synthesis of PG6-PLA-PEG-FA via grafting hydrophobic PLA and hydrophilic PEG to a polyglycerol core, followed by folic acid conjugation.
• Characterization using NMR, UV-vis spectroscopy, and SEC-MALLS.
• Nanoparticle formation via self-assembly, drug encapsulation, and TEM imaging; in vitro targeting assays.

Main Results:

• Successful synthesis and characterization of the PG6-PLA-PEG-FA polymer.
• Formation of stable nanoparticles capable of encapsulating paclitaxel (PTX).
• Demonstrated enhanced inhibition of folate receptor-positive tumor cells by PTX-loaded PG6-PLA-PEG-FA nanoparticles, indicating successful folate-mediated targeting.

Conclusions:

• The synthesized hyperbranched amphiphilic polymer PG6-PLA-PEG-FA can self-assemble into nanoparticles for drug delivery.
• Folic acid conjugation imparts specific targeting to folate receptor-positive cancer cells.
• PTX-loaded PG6-PLA-PEG-FA nanoparticles show promising potential for targeted cancer therapy.