Folate-Targeted Anticancer Drug Delivery via a Combination Strategy of a Micelle Complex and Reducible Conjugation

Area of Science:

• Biomedical Engineering
• Materials Science
• Nanotechnology

Background:

• Active targeting ligands on nanocarriers enhance cancer therapy by recognizing cancer cell receptors.
• Folic acid (FA) is a common ligand, but its hydrophobic nature can destabilize nanocarriers.
• Existing methods to stabilize FA-conjugated nanocarriers involve complex multi-step processes.

Purpose of the Study:

• To develop a simplified strategy for folic acid-mediated targeted anticancer drug delivery.
• To overcome the instability issues associated with conjugating hydrophobic folic acid to nanocarriers.
• To create a stable micelle complex for effective in vivo drug delivery.

Main Methods:

• Conjugation of folic acid (FA) to a reduction-sensitive amphiphilic copolymer (PCL3-SS-POEGMA1) via a disulfide link using click chemistry.
• Formation of a micelle complex by mixing the FA-conjugated copolymer with the parent copolymer.
• Evaluation of the micelle complex for targeted drug delivery, salt stability, and in vitro/in vivo performance.

Main Results:

• A novel reduction-sensitive miktoarm star-shaped copolymer (PCL3-SS-POEGMA1-SS-FA) was synthesized.
• The micelle complex exhibited excellent salt stability in vitro and in vivo.
• The strategy enabled effective FA-mediated targeted drug delivery without compromising nanocarrier stability.

Conclusions:

• The combined strategy of micelle complexation and reducible conjugation offers a simple and effective approach for FA-mediated drug delivery.
• This method enhances nanocarrier stability and targeting efficiency for anticancer applications.
• The developed strategy provides a powerful means to promote FA-targeted anticancer drug delivery.