Observational studyNeurology2026
Influence of Decreased Kidney Function on Plasma Biomarkers of Neurodegenerative Disorders in Routine Care: Confirmation of the Interest of Ratios.
Observational study in Neurology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05427448 (Clinical Validation of the Use of Blood Biomarkers for the Diagnosis and Monitoring of Alzheimer's Disease), which is not on this map. Cited by 2 papers.
What it found
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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.
Clinical Validation of the Use of Blood Biomarkers for the Diagnosis and Monitoring of Alzheimer's Disease
Who cites it
2 citing papers in PubMed.
- Chronic kidney disease and cognitive decline: choroid plexus remodeling, glymphatic dysfunction, and alzheimer biomarker interpretation.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026Review
- Common Medical Comorbidities, Demographic Factors and Levels of Plasma Biomarkers of Alzheimer's Disease and Neurodegeneration in Black/African American Older Adults.Biomolecules · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
objectivesInterest in plasma biomarkers for neurodegenerative disorders is growing, but their reliance on glomerular filtration makes kidney function a key potential confounder. This study assesses the effect of kidney function (eGFR) on plasma biomarkers of neurodegeneration and on their accuracy for detecting cerebral amyloidosis.
methodsThis observational study aims at studying the effect of kidney function on blood biomarkers through simultaneous measurements of creatinine, plasma, and CSF biomarkers (Aβ42, Aβ40, p-tau181, p-tau217, neurofilament light chain [NfL], glial fibrillary acidic protein [GFAP], and brain-derived tau [BD-tau]), as well as plasma biomarker ratios (Aβ42/Aβ40, p-tau217/Aβ42, NfL/p-tau217, and p-tau181/Aβ42), in the ALZAN cohort of patients. This prospective multicenter cohort (#NCT05427448), recruited across Montpellier, Nîmes, and Perpignan hospitals, included patients from November 2022 to July 2024 who met the following criteria: age ≥18 years, informed consent, and concomitant CSF and blood sampling. To determine the association between plasma biomarkers and kidney function, we performed univariable linear regression analyses.
resultsA total of 420 patients were included (mean age: 71.1 years, %female: 53.2) and subdivided into 3 groups according to eGFR value (ml/minute/1.73 m DISCUSSION: Impaired kidney function was linked to increased plasma cerebral amyloidosis biomarkers, but ratio-based measures (especially p-tau217/Aβ42) showed stable sensitivity and specificity for detecting cerebral amyloidosis across all eGFR groups. Additional studies including more patients with lower eGFR values in diverse diagnostic settings are needed to clarify the influence of kidney function on these biomarkers. CLASSIFICATION OF EVIDENCE: This Class II evidence shows that kidney function influences individual blood biomarkers used for cerebral amyloidosis detection, but not their ratios. TRIAL REGISTRATION INFORMATION: NCT05427448.
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