How do SARS-CoV-2 proteins mechanistically accelerate pathological fibril formation in neurons?

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Priority

85%

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Market price

50%

Description

The abstract states that viral proteins can accelerate pathological fibril formation, but the specific molecular mechanisms are not explained. Understanding these pathways is critical for developing interventions to prevent post-COVID neurodegeneration.

Gap type: unexplained_observation Source paper: SARS-CoV-2, aging, and Post-COVID-19 neurodegeneration. (2023, Journal of neurochemistry, PMID:36458986)

Resolution criteria

Resolution requires: (1) In vitro fibril kinetics: ThT fluorescence assay showing SARS-CoV-2 proteins (nucleocapsid, spike fragments, or nsp) accelerate Abeta42 or alpha-synuclein fibril formation with >=3-fold faster t50 at equimolar concentrations, with dose-response across >=4 protein concentrations; (2) Cryo-EM or AFM structure of co-aggregates identifies specific interaction interfaces, with alanine-scanning mutagenesis confirming >=2 residues essential for co-aggregation acceleration; (3) Cellular validation: neurons or iPSC-derived dopaminergic cells exposed to SARS-CoV-2 protein show >=2-fold increase in intracellular alpha-syn inclusions (pS129+ puncta by immunofluorescence) and >=25% reduction in viability, reversible by peptide inhibitors targeting identified interface. Epidemiological association between COVID-19 and neurodegeneration risk without mechanistic data is insufficient.

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