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ACCESS Brain-derived Tau Assay
About 80% of the Tau protein found in plasma originates from peripheral tissues, creating a critical need to selectively measure Tau that originates in the central nervous system (CNS). Brain-derived Tau (BD-Tau) is produced exclusively in the brain and can be detected in the CNS and peripheral blood.
Research shows that measuring BD-Tau can accurately identify Alzheimer’s disease (AD)-specific neurodegeneration, distinguishing it from non-AD diseases (i.e., frontotemporal dementia, traumatic brain injury, stroke, multiple sclerosis)1,2
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We are working to create a brighter future for individuals affected with neurodegenerative diseases.
Discover more about our RUO BD-Tau assay and its potential applications.
%CV across the measurement range
pg/mL Limit of Detection
Detection of BD-Tau in all samples on both the DxI 9000 and Access 2 analyzers
All
BD-Tau
- Shows strong correlation to CSF Total Tau (T-Tau) for investigational purposes.
- Displays a significant association with AD-related pathology and cognition in research.
- Assists in research into risk stratification for research groups, exploring disease and treatment management.
What’s unique about the Beckman Coulter RUO assay?
- Fully automated for use on the DxI 9000 and Access 2 analyzers
- Streamlined workflow for clinical research labs
- Enhanced sensitivity and specificity with %CV <4% across the testing range
Assay Characteristic |
Access BD-Tau (RUO) |
| Assay format | Two-step sandwich |
| Recommended sample type(s) | Plasma (K2-EDTA) |
| Unit of measure | pg/mL |
| Analytical Measuring Range | 0.057 – 300 pg/mL |
| Open reagent pack stability | 2 to 10°C for 31 days |
| Open calibrator pack stability | 2 to 10°C for 31 days |
| Open QC vial stability | 2 to 10°C for 31 days |
| Sample volume (uptake) | Access 2 & DxI 9000: 55 µL |
| Time to first result (approximate) | Access 2: ~32 minutes DxI 9000: ~38 minutes |
| Imprecision (%CV) Within-Laboratory | Access 2: ~2.3-3.8% DxI 9000: ~1.9 – 2.8% |
We are committed to research that advances neurodegenerative disease diagnostics to make them more accessible to people around the world. Leveraging our history of IVD development, we are empowering cutting-edge research with high-quality, innovative assays that deliver accurate and affordable testing solutions at scale. Learn more about our comprehensive solutions.
BD-Tau and Neurodegenerative diseases
BD-Tau levels are correlated with increased levels of Amyloid beta plaques in the brain.
Studying BD-Tau may help to further research into AD pathology, flag samples from those with early-stage AD-pathology,
and aid in distinguishing AD from other forms of dementia.
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References:
1. Gonzalez-Ortiz F, Kirsebom B-E, Contador J, et al. Plasma brain-derived tau is an amyloid-associated neurodegeneration biomarker in Alzheimer’s disease. Nat Commun. 2024;15(1):2908. doi:10.1038/s41467-024-47286-5
2. Vlegels N, Gonzalez-Ortiz F, Knuth NL, et al. Brain-derived Tau for Monitoring Brain Injury in Acute Ischemic Stroke. medRxiv. November 19, 2023. doi:10.1101/2023.11.18.23298728
(2025-14798)
