A tiny gut sensor to better understand anxiety, mood and digestive health
Researchers have found a way to listen in real time to our “second brain”, the one in the gut, with a micro sensor thinner than a hair. Follow me until the end and I will explain why this technology can change the way we understand anxiety, mood and digestive diseases.
A team at the University of Cambridge, together with the Thayer School of Engineering at Dartmouth, has developed a soft and flexible implant that sits between the walls of the intestine and records the electrical activity of the enteric nervous system. They tested it in rodents and pigs, even while the animals are awake and moving, and they observed how the neurons in the gut react to food, stress and physical pressure. Until now these signals were almost impossible to measure in real conditions, because experiments were done under anesthesia and the intestine is always moving.
This matters because for years clinical studies have linked the gut–brain axis to disorders such as irritable bowel syndrome, anxiety, depression and Parkinson’s disease. Here in the United States several research centers work on microbiota and mood, but often with indirect data: questionnaires, blood tests, stool samples. With a sensor like this, we can finally measure continuously how the “second brain” reacts to drugs, diet and stress. For people with ulcerative colitis, Crohn’s disease or gastroparesis, it could become a tool to personalize treatments instead of relying on trial and error.
There is also the question of data. A continuous trace of gut activity is a new and very sensitive type of health information. Here in the United States the debate on who owns health data is already intense with smartwatches and apps. If technologies like this are used with clear rules and in the interest of patients, they can help us understand how much our mental well being depends on the body and open a new season of more precise and less guess based medicine.
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