Active microgel particle swarms for intrabronchial targeted delivery

Area of Science:

• Biomedical Engineering
• Materials Science
• Respiratory Medicine

Background:

• Targeted intrabronchial delivery of therapeutics is crucial for treating respiratory diseases.
• Current methods face challenges like off-target drug accumulation and limited scope in complex bronchial trees.

Purpose of the Study:

• To develop microrobotic swarms for precise, targeted intrabronchial delivery of therapeutic agents.
• To overcome limitations of current delivery methods in tortuous and air-filled lung environments.

Main Methods:

• Development of magnetic hydrogel microparticle swarms.
• Utilizing programmed magnetic fields for controlled locomotion and structural reconfiguration.
• Integration of imaging contrast agents for real-time tracking via X-ray fluoroscopy and CT imaging.

Main Results:

• Demonstrated controllable locomotion and adaptive structure reconfiguration of microgel swarms in simulated and actual lung environments.
• Achieved successful magnetic navigation and in vivo delivery into deep bronchial branches.
• Validated on-demand swarm reconfiguration to prevent off-target entry and enable precise delivery into tilted bronchi.

Conclusions:

• Magnetic microrobotic swarms offer a promising solution for targeted intrabronchial drug delivery.
• This technology enhances precision, navigability, and therapeutic efficacy for respiratory diseases.