In the new study, the team measured levels of pTau217 in blood samples from two groups of healthy newborns and compared them to levels found in teenagers, adults ages 18 to 25, and older adults ages 70 to 77. No cognitive impairment or any impairment was detected during testing in any of the participants.
Moreover, pTau217 levels in newborns were five times higher than in older people.
Experts also examined the blood of “extremely premature” babies, that is, born before the 28th week of pregnancy, and followed them for 40 weeks. In most cases, blood levels of pTau217 were higher than those born at full term. This rate decreased as premature babies grew older, reaching levels observed in healthy young adults around 20 weeks after birth.
Source: Ferra
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