Researchers at the University of Zurich have found 10 biomarkers in saliva that can objectively measure acute sleep deprivation, offering new possibilities for detecting fatigue in transportation and high-risk workplaces.
Scientists in Switzerland have developed a way to spot acute sleep deprivation using just a saliva sample. This new method could help boost safety in areas where staying alert is essential, such as driving and certain critical jobs.
How a Simple Sample Uncovers What’s Going On
The research team at the University of Zurich (UZH) discovered that certain biological markers in saliva change when someone hasn’t had enough sleep. With a straightforward test, these markers can be detected, making it possible to identify fatigue without complicated procedures.
Until now, there wasn’t a direct test to measure sleep loss using body fluids. While tests for substances like alcohol or drugs exist, measuring exhaustion has been much more difficult. This new saliva-based method could address that challenge.
Thomas Krämer, professor of forensic pharmacology and toxicology at UZH Institute of Forensic Medicine, explained, “Our study provides the first direct biomarkers of sleep deprivation in saliva under realistic conditions – a milestone for forensic research.” This development could become a valuable tool for improving safety wherever attention and focus are important.
Inside the Lab Where Patterns Start to Emerge
The study involved 20 healthy young men who usually sleep between seven and nine hours a night. Participants went through three scenarios: staying awake all night, sleeping only six hours for four nights, and getting a normal eight hours as a control.
After each scenario, researchers collected saliva samples and analyzed them using high-resolution mass spectrometry, a technique that can detect thousands of molecules at once. They then used machine learning to find patterns linked to sleep deprivation.
Michael Scholz, lead author, shared, “We found that acute sleep deprivation affects about 10% of all biomolecules in saliva. The challenge was to identify, among tens of thousands of molecules, those that reliably indicate fatigue. Using state-of-the-art technology, we succeeded in identifying 10 biomarkers that do exactly that.” The team succeeded in pinpointing 10 biomarkers that specifically signal when someone is acutely sleep-deprived.
These findings suggest that a single saliva sample can give an objective measure of fatigue, which could be especially useful in situations where safety is a top priority.
What This Means for Safety on the Road and at Work
The research is now moving into a larger, international field study. The aim is to test the patented biomarker set in real-world situations, such as shift work, and to see how factors like alcohol or medication might affect the results. This step is necessary before the test can be widely used.
The long-term goal is to develop a rapid test that could be used on-site, for example at roadside checks or in workplaces where alertness is critical. Such a test could improve road safety and enhance safety in work environments where attention and concentration are critical.
Why This Matters for Everyday Life
Sleep problems are widespread, with about a third of people in Switzerland reporting difficulties, according to a recent health survey. Young adults aged 15 to 39 and women are especially affected. This makes the new saliva test particularly relevant.
Fatigue is a known risk factor for accidents on the road and mistakes in jobs that require constant attention, such as healthcare or transportation. An objective test for sleep deprivation could help reduce these risks by providing a clear, science-backed measure of fatigue.
What’s Next for This Promising Test
More research is needed to make sure the test works well for different people and in various situations, but the outlook is positive. If successful, this saliva-based test could become a routine part of health checks or workplace safety programs.
Doctors might use it to diagnose sleep disorders more accurately, and employers could screen workers in critical roles. Individuals could even use it to check their own alertness after a poor night’s sleep before driving.
This research is a step toward making fatigue detection more practical and accessible. As development continues, it could help more people stay safe and healthy by making it easier to know when someone is too tired to perform important tasks.
Source: news-medical.net