Magnetic-Driven Wheel-Like Microswarms Based on Mechanical Grinding for Cancer Treatment

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Colorectal cancer presents a significant global health challenge, driving the need for innovative therapeutic strategies.
• Magnetically actuated micro/nanorobots show promise for cancer applications but face challenges in achieving precise physical interventions and minimizing side effects.

Purpose of the Study:

• To introduce a magnetic-field-controlled, wheel-like microswarm system for targeted mechanical elimination of cancer cells.
• To assess the system's magnetic responsiveness, mechanical grinding capability, and in vitro efficacy.

Main Methods:

• Fabrication of microswarms using a nickel-diamond composite for magnetic control and mechanical cutting.
• Utilizing external magnetic fields to guide and control microswarm locomotion for precise targeting.
• Validating grinding efficacy via nanocopper layer removal and in vitro experiments with HeLa cells.

Main Results:

• Demonstrated precise magnetic-field-controlled locomotion of the wheel-like microswarms.
• Successfully validated the mechanical grinding capability of the microswarms against cancer cells in vitro.
• Biosafety assessments (hemolysis, coagulation, cytotoxicity) indicated acceptable biocompatibility under specific conditions.

Conclusions:

• The developed wheel-like microswarms offer a novel physical method for localized cancer cell destruction.
• This technology has the potential to advance precision oncology and expand the use of micro/nanorobotic systems in biomedical engineering.