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ESCRT-mediated uptake and degradation of brain-targeted ?-synuclein single chain antibody attenuates neuronal degeneration in vivo.


ABSTRACT: Parkinson's disease and dementia with Lewy bodies are neurodegenerative disorders characterized by accumulation of ?-synuclein (?-syn). Recently, single-chain fragment variables (scFVs) have been developed against individual conformational species of ?-syn. Unlike more traditional monoclonal antibodies, these scFVs will not activate or be endocytosed by Fc receptors. For this study, we investigated an scFV directed against oligomeric ?-syn fused to the LDL receptor-binding domain from apolipoprotein B (apoB). The modified scFV showed enhanced brain penetration and was imported into neuronal cells through the endosomal sorting complex required for transport (ESCRT) pathway, leading to lysosomal degradation of ?-syn aggregates. Further analysis showed that the scFV was effective at ameliorating neurodegenerative pathology and behavioral deficits observed in the mouse model of dementia with Lewy bodies/Parkinson's disease. Thus, the apoB modification had the effect of both increasing accumulation of the scFV in the brain and directing scFV/?-syn complexes for degradation through the ESCRT pathway, leading to improved therapeutic potential of immunotherapy.

SUBMITTER: Spencer B 

PROVIDER: S-EPMC4428402 | biostudies-literature | 2014 Oct

REPOSITORIES: biostudies-literature

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ESCRT-mediated uptake and degradation of brain-targeted α-synuclein single chain antibody attenuates neuronal degeneration in vivo.

Spencer Brian B   Emadi Sharareh S   Desplats Paula P   Eleuteri Simona S   Michael Sarah S   Kosberg Kori K   Shen Jay J   Rockenstein Edward E   Patrick Christina C   Adame Anthony A   Gonzalez Tania T   Sierks Michael M   Masliah Eliezer E  

Molecular therapy : the journal of the American Society of Gene Therapy 20140710 10


Parkinson's disease and dementia with Lewy bodies are neurodegenerative disorders characterized by accumulation of α-synuclein (α-syn). Recently, single-chain fragment variables (scFVs) have been developed against individual conformational species of α-syn. Unlike more traditional monoclonal antibodies, these scFVs will not activate or be endocytosed by Fc receptors. For this study, we investigated an scFV directed against oligomeric α-syn fused to the LDL receptor-binding domain from apolipopro  ...[more]

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