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Fox Foundation","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100000864","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100000243","name":"W. Garfield Weston Foundation","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100000243","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,6,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Parkinson\u2019s disease is a progressive neurodegenerative disorder characterized by the intracellular accumulation of insoluble alpha-synuclein aggregates into Lewy bodies and neurites. Increasing evidence indicates that Parkinson\u2019s disease progression results from the spread of pathologic alpha-synuclein through neuronal networks. However, the exact mechanisms underlying the propagation of abnormal proteins in the brain are only partially understood. The objective of this study was first to describe the long-term spatiotemporal distributions of Lewy-related pathology in mice injected with alpha-synuclein preformed fibrils and then to recreate these patterns using a computational model that simulates in silico the spread of pathologic alpha-synuclein.<\/jats:p>\n                  <jats:p>In this study, 87 2\u20133-month-old non-transgenic mice were injected with alpha-synuclein preformed fibrils to generate a comprehensive post-mortem dataset representing the long-term spatiotemporal distributions of hyperphosphorylated alpha-synuclein, an established marker of Lewy pathology, across the 426 regions of the Allen Mouse Brain Atlas. The mice were injected into either the caudoputamen, nucleus accumbens or hippocampus, and followed over 24 months with pathologic alpha-synuclein quantified at seven intermediate time points. The pathologic patterns observed at each time point in this high-resolution dataset were then compared to those generated using a Susceptible-Infected-Removed (SIR) computational model, an agent-based model that simulates the spread of pathologic alpha-synuclein for every brain region taking simultaneously into account the effect of regional brain connectivity and Snca gene expression.<\/jats:p>\n                  <jats:p>Our histopathological findings showed that differentially targeted seeding of pathological alpha-synuclein resulted in unique propagation patterns over 24 months and that most brain regions were permissive to pathology. We found that the SIR model recreated the observed distributions of pathology over 24 months for each injection site. Null models showed that both Snca gene expression and connectivity had a significant influence on model fit.<\/jats:p>\n                  <jats:p>In sum, our study demonstrates that the combination of normal alpha-synuclein concentration and brain connectomics contributes to making brain regions more vulnerable to the pathological process, providing support for a prion-like spread of pathologic alpha-synuclein. We propose that this rich dataset and the related computational model will help test new hypotheses regarding mechanisms that may alter the spread of pathologic alpha-synuclein in the brain.<\/jats:p>","DOI":"10.1093\/brain\/awab440","type":"journal-article","created":{"date-parts":[[2021,12,13]],"date-time":"2021-12-13T15:16:42Z","timestamp":1639408602000},"page":"1743-1756","source":"Crossref","is-referenced-by-count":77,"title":["Differentially targeted seeding reveals unique pathological alpha-synuclein propagation patterns"],"prefix":"10.1093","volume":"145","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5786-3278","authenticated-orcid":false,"given":"Shady","family":"Rahayel","sequence":"first","affiliation":[{"name":"Department of Neurology and Neurosurgery, The Neuro (Montreal Neurological Institute-Hospital) , Montreal, Quebec H3A 2B4, Canada"},{"name":"Centre for Advanced Research in Sleep Medicine, H\u00f4pital du Sacr\u00e9-C\u0153ur de Montr\u00e9al, Montreal, Quebec H4J 1C5, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0307-2862","authenticated-orcid":false,"given":"Bratislav","family":"Mi\u0161i\u0107","sequence":"additional","affiliation":[{"name":"Department of Neurology and Neurosurgery, The Neuro (Montreal Neurological Institute-Hospital) , Montreal, Quebec H3A 2B4, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying-Qiu","family":"Zheng","sequence":"additional","affiliation":[{"name":"Wellcome Centre for Integrative Neuroimaging, Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, John Radcliffe Hospital , Oxford, Oxfordshire, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0917-7905","authenticated-orcid":false,"given":"Zhen-Qi","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Neurology and Neurosurgery, The Neuro (Montreal Neurological Institute-Hospital) , Montreal, Quebec H3A 2B4, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alaa","family":"Abdelgawad","sequence":"additional","affiliation":[{"name":"Department of Neurology and Neurosurgery, The Neuro (Montreal Neurological Institute-Hospital) , Montreal, Quebec H3A 2B4, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7980-8667","authenticated-orcid":false,"given":"Nooshin","family":"Abbasi","sequence":"additional","affiliation":[{"name":"Department of Neurology and Neurosurgery, The Neuro (Montreal Neurological Institute-Hospital) , Montreal, Quebec H3A 2B4, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Caputo","sequence":"additional","affiliation":[{"name":"Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine , Philadelphia, PA 19104-4283, 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