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Title: Researchers Develop New Tool To Measure Biological Age

Link: https://science.slashdot.org/story/25/07/11/2...

Stanford researchers have developed a blood-based AI tool that calculates the
biological age of individual organs to reveal early signs of aging-related
disease. The Mercury News reports: The tool, unveiled in Nature Medicine
Wednesday, 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." 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
analyzed 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. [...] The test ...
would cost $200 once it could be operated at scale.

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