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Passive Immunization Reduces Behavioral and Neuropathological Deficits in an Alpha-Synuclein Transgenic Model of Lewy Body Disease

By Eliezer Masliah, Edward Rockenstein, Michael Mante, Leslie Crews, Brian Spencer, Anthony Adame, Christina Patrick, Margarita Trejo, Kiren Ubhi, Troy T. Rohn, Sarah Mueller-Steiner, Peter Seubert, Robin Barbour, Lisa McConlogue, Manuel Buttini, Dora Games and Dale Schenk


Dementia with Lewy bodies (DLB) and Parkinson's Disease (PD) are common causes of motor and cognitive deficits and are associated with the abnormal accumulation of alpha-synuclein (α-syn). This study investigated whether passive immunization with a novel monoclonal α-syn antibody (9E4) against the C-terminus (CT) of α-syn was able to cross into the CNS and ameliorate the deficits associated with α-syn accumulation. In this study we demonstrate that 9E4 was effective at reducing behavioral deficits in the water maze, moreover, immunization with 9E4 reduced the accumulation of calpain-cleaved α-syn in axons and synapses and the associated neurodegenerative deficits. In vivo studies demonstrated that 9E4 traffics into the CNS, binds to cells that display α-syn accumulation and promotes α-syn clearance via the lysosomal pathway. These results suggest that passive immunization with monoclonal antibodies against the CT of α-syn may be of therapeutic relevance in patients with PD and DLB

Topics: Research Article
Publisher: Public Library of Science
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Provided by: PubMed Central

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