A transferrin receptor-targeted liposomal formulation for docetaxel

Area of Science:

• Nanomedicine
• Drug Delivery Systems
• Cancer Therapeutics

Background:

• Transferrin receptor (TfR) is over-expressed on epithelial cancer cells.
• Targeted delivery systems can enhance drug efficacy and reduce side effects.
• Liposomes are versatile nanocarriers for drug delivery.

Purpose of the Study:

• To develop and characterize transferrin receptor (TfR)-targeted liposomes loaded with docetaxel.
• To evaluate the in vitro efficacy, stability, and pharmacokinetic profile of these targeted liposomes.

Main Methods:

• Docetaxel-loaded liposomes were prepared using polycarbonate membrane extrusion.
• Liposomes were surface-functionalized with transferrin (Tf) via post-insertion.
• Liposome stability, cellular uptake (calcein-loaded liposomes), cytotoxicity (docetaxel-loaded liposomes), and pharmacokinetics were assessed.

Main Results:

• TfR-targeted liposomes demonstrated enhanced stability (>6 months).
• Efficient uptake of TfR-targeted liposomes by TfR+ K562 cells was observed.
• In vitro studies showed 3.6-fold greater cytotoxicity of TfR-targeted docetaxel liposomes compared to non-targeted liposomes.
• Liposomal formulations exhibited significantly longer terminal half-lives than conventional docetaxel formulation.

Conclusions:

• TfR-targeted liposomes are a promising drug delivery vehicle for TfR+ cancers.
• This targeted approach enhances drug cytotoxicity and improves pharmacokinetic properties.
• Further investigation is warranted to explore their therapeutic potential in vivo.