Folate targeting self-limiting hyperthermic nanoparticles for controlled photothermal therapy

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Materials Science

Background:

• Photothermal therapy uses agents to generate heat upon light exposure.
• Current methods lack accurate nanoscale temperature measurement for nanoparticle agents.
• Developing precise temperature-reporting photothermal agents is crucial for effective therapy.

Purpose of the Study:

• To fabricate self-limiting hyperthermic nanoparticles capable of simultaneous heat generation and ratiometric temperature reporting.
• To overcome limitations in bulk temperature measurement for nano-photothermal agents.
• To demonstrate targeted photothermal therapy using these novel nanoparticles.

Main Methods:

• Synthesized nanoparticles with a plasmonic core for photothermal properties.
• Incorporated fluorescent Förster Resonance Energy Transfer (FRET) pairs within a silica shell for temperature sensing.
• Utilized folate functionalization for targeted delivery in a cell model.

Main Results:

• Demonstrated simultaneous photoinduced hyperthermia and ratiometric temperature measurement.
• Achieved a notable conversion efficiency of 19.5% despite the nanoparticle's shell architecture.
• Successfully showed targeted photothermal therapy in a HeLa cell model.

Conclusions:

• Developed innovative nanoparticles for self-limiting hyperthermia with integrated temperature sensing.
• These agents enable accurate nanoscale temperature monitoring during photothermal therapy.
• Folatel-functionalized nanoparticles show promise for targeted hyperthermia applications.