Latest news with #Wyss-Coray
Gulf Today
11-07-2025
- Health
- Gulf Today
Researchers develop new tool to measure biological age
Andrew Zeng, Tribune News Service Researchers at Stanford University have developed a new tool that can compute the 'biological age' of human organs by processing a single vial of blood. The tool, unveiled in Nature Medicine Wednesday morning, was developed by a research team spearheaded by Tony Wyss-Coray. Wyss-Coray, a Stanford Medicine professor who has spent almost 15 years fixated on the study of aging, said that the tool could 'change our approach to health care.' 'It could help us shift from sick care to health care, and empower people to take care of their own body,' he said. Scouring a single draw of blood for thousands of proteins, the tool works by first comparing the levels of these proteins with their average levels at a given age. An artificial intelligence algorithm then uses these gaps to derive a 'biological age' for each organ. To test the accuracy of these 'biological ages,' the researchers processed data for 45,000 people from the UK Biobank, a database that has kept detailed health information from over half a million British citizens for the last 17 years. When they analysed the data, the researchers found a clear trend for all 11 organs they studied; biologically older organs were significantly more likely to develop aging-related diseases than younger ones. For instance, those with older hearts were at much higher risk for atrial fibrillation or heart failure, while those with older lungs were much more likely to develop chronic obstructive pulmonary disease. But the brain's biological age, Wyss-Coray said, was 'particularly important in determining or predicting how long you're going to live.' 'If you have a very young brain, those people live the longest,' he said. 'If you have a very old brain, those people are going to die the soonest out of all the organs we looked at.' Indeed, for a given chronological age, those with 'extremely aged brains' — the 7% whose brains scored the highest on biological age — were over 12 times more likely to develop Alzheimer's disease over the next decade than those with 'extremely youthful brains' — the 7% whose brains inhabited the other end of the spectrum. Wyss-Coray's team also found several factors — smoking, alcohol, poverty, insomnia and processed meat consumption — were directly correlated with biologically aged organs. Poultry consumption, vigorous exercise, and oily fish consumption were among the factors correlated with biologically youthful organs. Supplements like glucosamine and estrogen replacements also seemed to have 'protective effects,' Wyss-Coray said. With these results, Wyss-Coray's team set about testing the tool on people in real time. The fifth person they tested was Paul Coletta, an entrepreneur who decided to participate in the test after reading a preliminary Nature paper that had been sent by a friend. The test found that Coletta, then 60, had kidneys that were biologically 68 years old. 'My GFR, my creatinine, all the typical kidney biomarkers came back as normal, but I followed up with an ultrasound, and it revealed a large renal cyst in my left kidney,' he said. 'It found an early signal of decline, and it empowered me to act.' Coletta was so impressed that he agreed to found Vero Bioscience, a company that now has an exclusive license from Stanford Medicine to commercialize the product, with Wyss-Coray. Coletta said he planned to make the tool the core of an 'at-home AI health clinic.' 'It's not just a kit where you send us your blood and you get a result,' he said. 'We want to support the consumer through the journey of what the intervention should be for that organ, interpreting the results and then retesting to see if there was a reversal in the organ age.' The test, Coletta said, would cost $200 once it could be operated at scale. Malia Fullerton, a professor of bioethics and humanities at the University of Washington, said that while the tool 'seems very promising as a global technique,' there were several ethical concerns when it came to its application. 'I could imagine for folks who are interested in being super agers, a desire to get rid of their quickly aging organs and replace them with new ones,' she said. 'I see the first negative consequence — particularly if this goes directly to consumer — being putting strains on our organ donation system, which is already under complete duress.' Overall, Fullerton said, 'the question your readers could ask themselves is: Is human lifespan, and is human quality of life merely a function of the health of our organs, or is there some higher-order set of interactions here that are not being captured in this kind of analysis?' Wyss-Coray said the risks of an organ transplant currently far outweighed the potential reward of replacing an aged organ with a healthy one, particularly since the test was merely a risk assessment. In any case, he said, it would be challenging to solve the issue completely.
UPI
10-07-2025
- Health
- UPI
'Old' brains increase risk of death, Alzheimer's, study says
Study results show that having an extremely aged brain nearly triples a person's risk of dying during a roughly 15-year period. Adobe stock/Hea;thDay July 10 (UPI) -- They say age is all in your mind -- and that might literally be true, a new study reveals. People with "young" brains -- brains aging more slowly than their actual age -- are much less likely to die or develop Alzheimer's disease than those with "old" brains suffering from accelerated aging, researchers reported Wednesday in the journal Nature Medicine. Results show that having an extremely aged brain nearly triples a person's risk of dying during a roughly 15-year period. At the same time, people with extremely youthful brains had a 40% lower risk of early death, researchers found. In other words, the biological age of the brain plays an outsized role in determining how long a person has left to live, said senior researcher Tony Wyss-Coray, director of the Knight Initiative for Brain Resilience at Stanford Medicine. "The brain is the gatekeeper of longevity," he said. "If you've got an old brain, you have an increased likelihood of mortality. If you've got a young brain, you're probably going to live longer." Previous research has shown that a person's body can age from wear-and-tear more rapidly that what is reflected by their birth date. Essentially, a person's biological age can be older than their calendar age. For this study, researchers analyzed blood samples from nearly 44,500 people 40 to 70 participating in the UK Biobank, a large-scale health research project in the United Kingdom. Researchers used proteins found in the blood samples to estimate the biological age of 11 distinct organs or organ systems for each person, including the brain. About 6% to 7% of participants had "extremely youthful" brains, and a similar proportion had "extremely aged" brains. Overall, researchers found that any organ's biological age increased its likelihood of disease. For example, an extremely aged heart increased risk of abnormal heart rhythm or heart failure, and aged lungs increased COPD risk. But the association between an aged brain and Alzheimer's was particularly powerful - more than three times that of a person with a normally aging brain, researchers said. On the other hand, people with youthful brains had a quarter of the Alzheimer's risk linked to brains that were aging normally, the study found. In other words, someone with a biologically old brain is about 12 times as likely to be diagnosed with Alzheimer's as a person the same age with a biologically young brain, researchers concluded. These results could open the door to new medical screenings that could determine people's risk for various diseases based on the biological age of their organs, Wyss-Coray said. Future research also could figure out whether existing approved drugs might restore organ youth before people develop a disease based on that aging organ, he added. "This is, ideally, the future of medicine," Wyss-Coray said. "Today, you go to the doctor because something aches, and they take a look to see what's broken. We're trying to shift from sick care to health care and intervene before people get organ-specific disease." Wyss-Coray plans to commercialize the blood sample test, working with companies to get it on the market within a few years. "The cost will come down as we focus on fewer key organs, such as the brain, heart and immune system, to get more resolution and stronger links to specific diseases," he said. More information The Mayo Clinic has more on biological versus chronological age. Copyright © 2025 HealthDay. All rights reserved.
