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SCIENTIFIC LITERATURE · MED

Detection of alpha-synuclein seeding activity in tear fluid in patients with Parkinson's disease.

NPJ Parkinsons Dis · 2026-02-18

DOI: 10.1038/s41531-026-01282-2PMID: 41708653

Open accessbrief-report; Journal ArticleOriginal source ↗

Research overview

The text below is the source article’s original abstract under a verified reuse license. cc by

Detection of alpha-synuclein (α-Syn) seeding activity in tear fluid (TF) offers a promising non-invasive biomarker for Parkinson's disease (PD). α-Syn seeding amplification assay (αSynSAA) detected seeding activity in 67% of PD-TF, while non-synucleinopathy samples remained negative. Electron microscopy of seeding-positive end products revealed fibrillar structures morphologically consistent with results of αSynSAA. αSynSAA effectively distinguished PD from controls and prion diseases based on seeding activity in TF.

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