Dual-phoretic wireless device for directionally oriented and carrier-free targeted drug delivery

Area of Science:

• Biomedical Engineering
• Drug Delivery Systems
• Nanotechnology

Background:

• Localized diseases often involve biological barriers, hindering effective drug delivery and causing side effects.
• Current drug delivery methods struggle with precise localization, controlled release, and tissue penetration.

Purpose of the Study:

• To develop and validate a dual-phoretic wireless drug delivery system for enhanced therapeutic efficacy in localized diseases.
• To demonstrate controllable drug release and directional penetration through biological barriers.

Main Methods:

• A wireless system integrating electrophoresis for controlled release and iontophoresis for directional penetration was designed.
• Ion diodes and Zn-based electrochemical cells were utilized for adjustable, pulsatile drug release.
• 3D tomographic analysis was employed to verify delivery efficiency in vivo.

Main Results:

• The dual-phoretic system achieved a fourfold improvement in drug delivery efficiency compared to diffusion, reaching tumor cores.
• A simulated 2-week treatment resulted in a 50% reduction in tumor volume.
• Minimal damage to surrounding normal tissues and off-target organs was observed.

Conclusions:

• The developed wireless dual-phoretic system offers a promising approach for targeted drug delivery in localized diseases.
• This technology enhances therapeutic efficacy while minimizing systemic toxicity and off-target side effects.