A wireless and battery-free wound infection sensor based on DNA hydrogel

Area of Science:

• Biomedical Engineering
• Molecular Biology
• Wireless Sensor Technology

Background:

• Wound infections pose a significant clinical challenge, necessitating timely detection for effective treatment.
• Current methods lack non-invasive, continuous monitoring capabilities for early infection detection outside clinical settings.
• Wireless biosensors are emerging as a promising solution for remote patient monitoring.

Purpose of the Study:

• To develop a flexible, wireless, and battery-free sensor for early detection of wound infections.
• To utilize bacteria-responsive DNA hydrogels for selective pathogen detection.
• To enable smartphone-based data transmission for real-time wound status monitoring.

Main Methods:

• Engineering DNA hydrogels that exhibit tunable dielectric changes in response to bacterial deoxyribonucleases.
• Integrating DNA hydrogels with near-field communication (NFC) technology for wireless data transmission.
• Validating the sensor's performance in a mouse acute wound model with Staphylococcus aureus infection.

Main Results:

• The developed sensor demonstrated selective detection of pathogenic bacteria via DNA hydrogel dielectric changes.
• Wireless, smartphone-based detection of physiologically relevant bacterial concentrations was achieved.
• Early detection of Staphylococcus aureus infection was possible before visible symptoms in a preclinical model.

Conclusions:

• The flexible, wireless, battery-free sensor offers a novel approach for continuous wound infection monitoring.
• This technology has the potential to significantly improve the management of surgical and chronic wounds.
• The study highlights the potential of DNA hydrogel-based biosensors for point-of-care diagnostics.