Indicia Production 1 article published in JoVE Medicine Detection of Disease-associated α-synuclein by Enhanced ELISA in the Brain of Transgenic Mice Overexpressing Human A53T Mutated α-synuclein Dominique Bétemps1, Jérémy Verchère1, Anne-Laure Mougenot2, Ingolf Lachmann3, Eric Morignat4, Emilie Antier5, Latifa Lakhdar5, Stéphane Legastelois2, Thierry Baron1 1Neurodegenerative Diseases Unit, ANSES - French Agency for Food, Environmental and Occupational Health & Safety, 2Indicia Production, 3AJ Roboscreen GmbH, 4Epidemiology Unit, ANSES - French Agency for Food, Environmental and Occupational Health & Safety, 5Experimental Facilities, ANSES - French Agency for Food, Environmental and Occupational Health & Safety An ELISA offering a novel quantitative approach is described. It specifically detects disease-associated α-synuclein (αSD) in a transgenic mouse model (M83) of synucleinopathy using several antibodies against either the Ser129 phosphorylated αS form or the C-terminal part of the protein.