ArticleNature communications2026
Tau isoform mapping across tissues and biofluids reveals a signature distinguishing Alzheimer's disease from amyotrophic lateral sclerosis.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Blood phosphorylated tau 217 (p-tau217) accurately detects Alzheimer's disease (AD) pathology but is also elevated in amyotrophic lateral sclerosis (ALS), likely reflecting peripheral (big) tau released from muscle. Assays selectively measuring brain-derived (BD-) tau and BD-p-tau217 are therefore needed. We analysed serum BD-tau and p-tau217 in ALS (n = 139), AD (n = 101) and controls (n = 75) using direct immunoassays and after BD-Tau immunoprecipitation (BD-Tau-IP), and tau species in brain (n = 16), spinal cord (n = 11) and muscle (n = 10) by targeted mass spectrometry. With the direct immunoassays, BD-tau and p-tau217 were increased in AD and ALS versus controls. After BD-Tau-IP, BD-tau and BD-p-tau217 were elevated in AD only, improving diagnostic accuracy. Mass spectrometry revealed a central-to-peripheral shift from BD-tau to big tau predominance, with exclusively big p-tau217 detected in muscle. Selective detection of BD-tau species improves the specificity of blood AD biomarkers by reducing peripheral tau confounding.
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