Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-03241-9
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Funding
- Parkinson Society of Canada [2014-685]
- Natural Sciences and Engineering Research Council of Canada [RG060805, CRDPJ490841-15, RG121541]
- CRC Program
- NIH [R01 NS086890, P30 NS076411]
- NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE [R01NS086890, P30NS076411] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON AGING [RF1AG057409, R01AG056259] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE ON DRUG ABUSE [DP1DA041722] Funding Source: NIH RePORTER
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Neuronal loss in Parkinson's disease (PD) is associated with aberrant mitochondrial function and impaired proteostasis. Identifying the mechanisms that link these pathologies is critical to furthering our understanding of PD pathogenesis. Using human pluripotent stem cells (hPSCs) that allow comparison of cells expressing mutant SNCA (encoding alpha-synuclein (alpha-syn)) with isogenic controls, or SNCA-transgenic mice, we show that SNCA-mutant neurons display fragmented mitochondria and accumulate alpha-syn deposits that cluster to mitochondrial membranes in response to exposure of cardiolipin on the mitochondrial surface. Whereas exposed cardiolipin specifically binds to and facilitates refolding of alpha-syn fibrils, prolonged cardiolipin exposure in SNCA-mutants initiates recruitment of LC3 to the mitochondria and mitophagy. Moreover, we find that co-culture of SNCA-mutant neurons with their isogenic controls results in transmission of alpha-syn pathology coincident with mitochondrial pathology in control neurons. Transmission of pathology is effectively blocked using an anti-alpha-syn monoclonal antibody (mAb), consistent with cell-to-cell seeding of alpha-syn.
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