ArticleJournal of clinical and translational science2026
Prediction of α-synuclein seed amplification assay positivity in remotely followed
Article in Journal of clinical and translational science, 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
The α-synuclein seed amplification assay (SAA) is a biomarker for Parkinson's disease (PD) but requires cerebrospinal fluid. We applied a validated model to predict α-synuclein SAA+ using remotely collected data in LRRK2 G2019S carriers. VALOR-PD participants completed at-home olfactory and autonomic assessments. SAA+ probabilities for manifest and non-manifest carriers at baseline and month 36 visits were estimated. Baseline SAA+ mean probability was 0.57 (manifest) and 0.28 (non-manifest). Over three years, SAA+ mean probabilities increased in manifest (0.66, p = 0.014) and non-manifest carriers (0.38, p < 0.001), paralleling olfactory declines. Remotely collected data may be used to approximate SAA classification.
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