Pathological α-synuclein transmission initiated by binding lymphocyte-activation gene 3
- PMID: 27708076
- PMCID: PMC5510615
- DOI: 10.1126/science.aah3374
Pathological α-synuclein transmission initiated by binding lymphocyte-activation gene 3
Abstract
Emerging evidence indicates that the pathogenesis of Parkinson's disease (PD) may be due to cell-to-cell transmission of misfolded preformed fibrils (PFF) of α-synuclein (α-syn). The mechanism by which α-syn PFF spreads from neuron to neuron is not known. Here, we show that LAG3 (lymphocyte-activation gene 3) binds α-syn PFF with high affinity (dissociation constant = 77 nanomolar), whereas the α-syn monomer exhibited minimal binding. α-Syn-biotin PFF binding to LAG3 initiated α-syn PFF endocytosis, transmission, and toxicity. Lack of LAG3 substantially delayed α-syn PFF-induced loss of dopamine neurons, as well as biochemical and behavioral deficits in vivo. The identification of LAG3 as a receptor that binds α-syn PFF provides a target for developing therapeutics designed to slow the progression of PD and related α-synucleinopathies.
Copyright © 2016, American Association for the Advancement of Science.
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Comment in
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Immune receptor for pathogenic α-synuclein.Science. 2016 Sep 30;353(6307):1498-1499. doi: 10.1126/science.aai9377. Science. 2016. PMID: 27708090 No abstract available.
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