Fig. 1. Transportation of α-synuclein from the brain to blood.
Mice were intracerebroventricularly injected with 125I-labeled α-synuclein. (a) Brain and blood plasma were then collected at 2, 5, 10, 20 and 60 min after injection. Levels of radioactivity in the brain and the plasma were determined using a gamma counter. (b) Blood was collected at 60 min after injection, followed by L1CAM-containing exosome extraction from platelet-free plasma. Levels of radioactivity were measured in the whole plasma, the exosome fraction (Exo), and the exosome-less fraction (supernatant after immunoaffinity capture; Super). Data shown are mean ± S.D. from 5 mice. CPM, counts per minute.