Optoacoustic-Guided Magnetic Microrobot Platform for Precision Drug Delivery

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Drug Delivery Systems

Background:

• Precision drug delivery faces challenges in loading, release, navigation, and monitoring.
• Existing systems lack integrated capabilities for these complex tasks.

Purpose of the Study:

• To develop a multifunctional magnetic microrobot platform (MMP) for enhanced precision drug delivery.
• To integrate high-capacity drug loading, controlled release, collective navigation, and real-time imaging into a single system.

Main Methods:

• Embedding hard-magnetic FePt nanoparticles in a degradable ZIF-8 shell for drug loading.
• Utilizing synergistic properties for pH- and radiofrequency-triggered drug release.
• Implementing reconfigurable swarm behavior strategies for navigation in complex vasculature.
• Employing 3D optoacoustic imaging for real-time visualization and tracking.

Main Results:

• Achieved high drug loading efficiency (≈93.9%) with the MMP.
• Demonstrated controlled drug release triggered by pH changes and radiofrequency heating.
• Showcased enhanced navigation efficiency against physiological blood flows using swarm strategies.
• Confirmed high-resolution visualization and dynamic tracking of MMP in ex vivo and in vivo experiments.

Conclusions:

• The developed MMP offers a comprehensive solution for precision drug delivery challenges.
• This integrated platform demonstrates potential for clinical translation in complex biological environments.
• The study paves the way for advanced precision therapies with real-time monitoring and control.