Clinically accurate diagnosis of Alzheimer’s disease via multiplexed sensing of core biomarkers in human plasma

Kayoung Kim, Min-Ji Kim, Da Won Kim, Su Yeong Kim, Steve Park () and Chan Beum Park ()
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Kayoung Kim: Korea Advanced Institute of Science and Technology (KAIST)
Min-Ji Kim: Korea Advanced Institute of Science and Technology (KAIST)
Da Won Kim: Korea Advanced Institute of Science and Technology (KAIST)
Su Yeong Kim: Korea Advanced Institute of Science and Technology (KAIST)
Steve Park: Korea Advanced Institute of Science and Technology (KAIST)
Chan Beum Park: Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract Alzheimer’s disease (AD) is the most prevalent neurodegenerative disorder, affecting one in ten people aged over 65 years. Despite the severity of the disease, early diagnosis of AD is still challenging due to the low accuracy or high cost of neuropsychological tests and neuroimaging. Here we report clinically accurate and ultrasensitive detection of multiple AD core biomarkers (t-tau, p-tau181, Aβ42, and Aβ40) in human plasma using densely aligned carbon nanotubes (CNTs). The closely packed and unidirectionally aligned CNT sensor array exhibits high precision, sensitivity, and accuracy, evidenced by a low coefficient of variation ( 93.0%). By measuring the levels of t-tau/Aβ42, p-tau181/Aβ42, and Aβ42/Aβ40 in clinical blood samples, the sensor array successfully discriminates the clinically diagnosed AD patients from healthy controls with an average sensitivity of 90.0%, a selectivity of 90.0%, and an average accuracy of 88.6%.

Date: 2020
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DOI: 10.1038/s41467-019-13901-z

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