| Autor: |
Szu-Ying Lin, Kun-Ju Lin, Po-Chen Lin, Chin-Chang Huang, Chiung-Chih Chang, Yi-Chung Lee, Ing-Tsung Hsiao, Tzu-Chen Yen, Wen-Sheng Huang, Bang-Hung Yang, Pei-Ning Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Alzheimer’s Research & Therapy, Vol 11, Iss 1, Pp 1-10 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
1758-9193 |
| DOI: |
10.1186/s13195-019-0566-0 |
| Popis: |
Abstract Introduction Due to the high cost and high failure rate of ascertaining amyloid positron emission tomography positivity (PET+) in patients with earlier stage Alzheimer’s disease (AD), an effective pre-screening tool for amyloid PET scans is needed. Methods Patients with mild cognitive impairment (n = 33, 24.2% PET+, 42% females, age 74.4 ± 7.5, MMSE 26.8 ± 1.9) and mild dementia (n = 19, 63.6% PET+, 36.3% females, age 73.0 ± 9.3, MMSE 22.6 ± 2.0) were recruited. Amyloid PET imaging, Apolipoprotein E (APOE) genotyping, and plasma amyloid β (Aβ)1–40, Aβ1–42, and total tau protein quantification by immunomagnetic reduction (IMR) method were performed. Receiver operating characteristics (ROC) analysis and Youden’s index were performed to identify possible cut-off points, clinical sensitivities/specificities, and areas under the curve (AUCs). Results Amyloid PET+ participants had lower plasma Aβ1–42 levels than amyloid PET-negative (PET−) subjects. APOE ε4 carriers had higher plasma Aβ1–42 than non-carriers. We developed an algorithm involving the combination of plasma Aβ1–42 and APOE genotyping. The success rate for detecting amyloid PET+ patients effectively increased from 42.3 to 70.4% among clinically suspected MCI and mild dementia patients. Conclusions Our results demonstrate the possibility of utilizing APOE genotypes in combination with plasma Aβ1–42 levels as a pre-screening tool for predicting the positivity of amyloid PET findings in early stage dementia patients. |
| Databáze: |
Directory of Open Access Journals |
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