ArticleAlzheimer's & dementia : the journal of the Alzheimer's Association2025
Evidence-based standardized sample handling protocol for accurate blood-based Alzheimer's disease biomarker measurement: Results and consensus of the Global Biomarker Standardization Consortium.
Article in Alzheimer's & dementia : the journal of the Alzheimer's Association, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
24 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Plasma p-tau as a biomarker for the differential diagnosis of Alzheimer's disease: a systematic review and meta-analysis.Alzheimer's research & therapy · 2026Pooled it
- Alzheimer's Disease Biomarkers Measured by Capillary Blood Collection Versus Venous Plasma and Cerebrospinal Fluid.Annals of clinical and translational neurology · 2026Article
- Neuroinflammation as a Final Common Pathway in Systemic Disease - How Systemic Disease Becomes Brain Disease.Current neurology and neuroscience reports · 2026Review
- Review
- Brain-derived plasma p-tau217 shows enhanced dynamic range for Alzheimer's disease neuropathological change.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Diagnostic performance of plasma pTau217 in genetically admixed South American populations.Nature communications · 2026Article
- Diagnostic performance of an automated plasma p-tau217 chemiluminescent assay for detecting Aβ pathology in a Chinese memory clinic cohort.The journal of prevention of Alzheimer's disease · 2026Article
- Serum NfL, GFAP, and p-tau217 in adults with drug-resistant epilepsy and intellectual disabilities: Signs of ongoing neural injury.Epilepsia · 2026Article
- Multicenter validation of plasma p-tau217/ amyloid beta 1-42 ratio in symptomatic Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- The potential of key Alzheimer's plasma biomarkers to mimic tau PET MUBADA-based disease staging.Alzheimer's research & therapy · 2026Article
- Plasma biomarkers for Alzheimer disease: the road from laboratory results to clinical practice.Nature reviews. Neurology · 2026Article
- Pre-analytical guidelines for blood and CSF Biomarkers 2025: Recommendations from the NACC ADRC Biofluid Biomarker Best Practices Workgroup.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Review
- Blood-based biomarkers for Alzheimer's disease diagnosis: a joint position paper from the Italian Societies of Neurology (SIN) and of Clinical Biochemistry and Clinical Molecular Biology - Laboratory Medicine(SIBioC) and from the Autonomous Association affiliated with SIN for dementia (SINdem).Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026Article
- Implementing plasma p-tau217 and cognitive testing for Alzheimer's screening in low-education populations in central China.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Integrating standard and native spaces for radiomics and brain network analysis in Alzheimer's disease diagnosis and prognosis.Journal of neurology · 2026Article
- Diagnostic Value of Serum p-tau217 in Alzheimer Disease: Equal to Plasma in Levels and Clinical Utility?Clinical chemistry · 2026Article
- The Alzheimer's Disease Diagnosis and Plasma Phospho-Tau217 (ADAPT) study stage 1: Validating clinical cut-points against CSF and amyloid PET.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026Article
- Translating blood-based biomarkers into Alzheimer's disease clinical practice: screening, diagnosis, and longitudinal monitoring.Frontiers in aging neuroscience · 2026Review
- Special Issue: "New Insights of Biomarkers in Neurodegenerative Diseases".International journal of molecular sciences · 2025Article
- Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
20 authors.
Funding
Abstract
introductionBlood-based biomarkers (BBMs) have revolutionized Alzheimer's disease diagnosis and monitoring. Their pre-analytical stability requires scrutiny. This study assessed pre-analytical effects to inform a standardized sample handling protocol.
methodsAssessed pre-analytical variations included collection tube type, hemolysis, centrifugation settings, centrifugation/storage delays, tube transfers, and freeze-thawing (n = 15/experiment). Phosphorylated tau (pTau) isoforms were measured with Simoa, Lumipulse, MesoScale Discovery, and immunoprecipitation-mass spectrometry. Amyloid-beta (Aβ42, Aβ40), glial fibrillary acidic protein (GFAP), and neurofilament light (NfL) protein were measured with Simoa.
resultsAll assessed BBM levels varied by over 10% by collection tube type. Aβ peptides were the most sensitive, and their levels declined >by more than 10% under storage and centrifugation delays, more steeply at room temperature (RT) compared with 2°C to 8°C. NfL and GFAP levels increased by more than 10% upon RT/-20°C storage. pTau isoforms demonstrated stability across most pre-analytical variations. DISCUSSION: We established an evidence-based handling protocol to ensure reliable sample handling for neurological BBMs upon adoption in clinics, trials, and research. HIGHLIGHTS: Sample handling protocols can mitigate pre-analytical effects on BBM results. We developed an evidence-based, expert-consensus plasma sample handling protocol. Primary collection tube and delays to centrifuging or freezing impact AD BBMs. Plasma pTau217 is highly resistant to pre-analytical sample handling variations. Plasma Aβ42 and Aβ40 were most sensitive to pre-analytical variations.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.