Programmable multi-DNA release from multilayered polyelectrolytes using gigahertz nano-electromechanical resonator.

Area of Science:

• Biotechnology
• Nanotechnology
• Materials Science

Background:

• Controllable and multiple DNA release is crucial for advanced gene-based therapies.
• Existing methods often require complex auxiliary molecules, limiting material and environmental flexibility.
• A new, versatile DNA release strategy is needed to overcome these limitations.

Purpose of the Study:

• To develop a novel and versatile DNA release method using a nano-electromechanical (NEMS) hypersonic resonator.
• To achieve controllable and multiple DNA release for gene therapy applications.
• To explore the potential of NEMS technology in high-throughput, implantable drug delivery systems.

Main Methods:

• Utilized a nano-electromechanical (NEMS) hypersonic resonator operating at gigahertz (GHz) frequencies.
• Excited micro-vortexes using ultra-high frequency acoustic waves to generate tunable shear stress.
• Disrupted molecular interactions in immobilized multilayered polyelectrolyte thin films to release embedded DNA strands.
• Verified feasibility through finite element model analysis and experimental results.

Main Results:

• Demonstrated controllable release of embedded DNA strands via tunable shear stress at the solid-liquid interface.
• Confirmed that both the release rate and the total released amount can be precisely tuned.
• Achieved differential release of two types of DNA molecules with distinct velocities by exploiting depth-dependent forces within the films.
• Validated the method's feasibility through simulations and experiments.

Conclusions:

• The developed NEMS hypersonic resonator platform enables controllable single and multi-DNA release.
• The resonator's miniaturization and batch manufacturing potential support development into high-throughput systems.
• This technology offers possibilities for implantable and site-targeting DNA release and delivery systems.