Lysosomal exocytosis releases pathogenic α-synuclein species from neurons in synucleinopathy models.
Lysosomal exocytosis releases pathogenic α-synuclein species from neurons in synucleinopathy models.
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DOI：
10.1038/s41467-022-32625-1
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发表时间：
2022-08-22
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
Considerable evidence supports the release of pathogenic aggregates of the neuronal protein α-Synuclein (αSyn) into the extracellular space. While this release is proposed to instigate the neuron-to-neuron transmission and spread of αSyn pathology in synucleinopathies including Parkinson’s disease, the molecular-cellular mechanism(s) remain unclear. To study this, we generated a new mouse model to specifically immunoisolate neuronal lysosomes, and established a long-term culture model where αSyn aggregates are produced within neurons without the addition of exogenous fibrils. We show that neuronally generated pathogenic species of αSyn accumulate within neuronal lysosomes in mouse brains and primary neurons. We then find that neurons release these pathogenic αSyn species via SNARE-dependent lysosomal exocytosis. The released aggregates are non-membrane enveloped and seeding-competent. Additionally, we find that this release is dependent on neuronal activity and cytosolic Ca2+. These results propose lysosomal exocytosis as a central mechanism for the release of aggregated and degradation-resistant proteins from neurons. Release of α-synuclein aggregates by neurons instigates spread of pathology in synucleinopathies, but the mechanism remains unclear. Here the authors show that neuronally generated α-synuclein aggregates accumulate within neuronal lysosomes and are released via SNARE-dependent lysosomal exocytosis.
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影响因子：
2.7
作者：
ARAI, K;KANASEKI, T;OHKUMA, S
通讯作者：
OHKUMA, S
影响因子：
15.1
作者：
Danzer KM;Kranich LR;Ruf WP;Cagsal-Getkin O;Winslow AR;Zhu L;Vanderburg CR;McLean PJ
通讯作者：
McLean PJ
影响因子：
4.7
作者：
Ahn, KJ;Paik, SR;Kim, J
通讯作者：
Kim, J
影响因子：
5.4
作者：
Dull, T;Zufferey, R;Naldini, L
通讯作者：
Naldini, L
影响因子：
14.5
作者：
Klein, Andres D.;Mazzulli, Joseph R.
通讯作者：
Mazzulli, Joseph R.