Gold nanorod-based smart platform for efficient cellular uptake and combination therapy.

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Materials Science

Background:

• Gold nanorods (GNRs) show promise as drug carriers due to biocompatibility and targeting capabilities.
• Limitations include drug structural changes, limited drug loading capacity, and small internal space compared to porous materials.

Purpose of the Study:

• To develop an amphiphilic polymer-coated GNR platform for combined chemo- and photothermal therapy.
• To overcome limitations of traditional GNR drug delivery systems.
• To enhance cancer treatment efficacy through synergistic therapeutic approaches.

Main Methods:

• Fabrication of GNRs coated with amphiphilic polymers containing hydrophobic chains, polyethylene glycol, and folic acid.
• Utilizing near-infrared (NIR) light to induce photothermal heating for controlled drug release and enhanced cellular uptake.
• Quantifying drug release kinetics using Nile red and assessing targeting and delivery efficiency with paclitaxel in cellular experiments.

Main Results:

• The GNR platform demonstrated controlled drug release upon NIR irradiation.
• Folic acid functionalization facilitated active targeting of cancer cells.
• The combination therapy showed enhanced efficacy in cellular experiments, confirming targeting and delivery efficiency.

Conclusions:

• The developed amphiphilic polymer-coated GNR platform is effective for chemo- and photothermal combination therapy.
• This platform offers advantages in drug encapsulation, controlled release, and targeted delivery for improved cancer treatment.
• The system integrates passive and active targeting strategies to maximize therapeutic outcomes.