Sub-1.4 cm³ capsule for detecting labile inflammatory biomarkers in situ

Area of Science:

• Gastroenterology
• Biomedical Engineering
• Molecular Biology

Background:

• Transient molecules like nitric oxide and hydrogen sulfide are crucial in gastrointestinal inflammation but are difficult to detect due to their short lifespan.
• Current methods for detecting these molecules in vivo are limited, hindering early diagnosis and monitoring of gastrointestinal diseases.

Purpose of the Study:

• To develop a miniaturized, ingestible device for real-time monitoring of transient inflammatory molecules in the gastrointestinal tract.
• To leverage genetically engineered probiotic biosensors for specific molecular detection and wireless signal transmission.

Main Methods:

• Integration of genetically engineered probiotic biosensors with a custom photodetector and readout chip.
• Encoding bacteria to produce luminescence in response to inflammation-associated molecules.
• Development of low-power electronic circuits for wireless signal conversion and transmission.
• In vivo demonstration in small and large animal models with a sub-1.4 cm³ ingestible device.

Main Results:

• Successful in vivo monitoring of transient inflammatory molecules in the gastrointestinal tract of animal models.
• Demonstration of a compact, ingestible device (sub-1.4 cm³) capable of wireless communication.
• Genetically engineered bacteria effectively produced luminescence in response to target molecules.

Conclusions:

• The developed device enables early diagnosis and accurate tracking of gastrointestinal diseases like inflammatory bowel disease.
• Wireless detection of short-lived molecules facilitates improved patient-caregiver communication and remote personalized care.
• This technology offers a novel approach for real-time in vivo monitoring of gut health.