Fig. 6: Complement C4 exacerbates α-syn aggregation and propagation in vivo.

A Representative fluorescent double labeling of p-S129 α-syn and TH in SN sections from mice injected with PBS, C4, α-syn PFF, or α-syn PFF + complement C4. Scale bar = 50 μm. B Representative Immunohistochemistry images of mouse brain sections labeled with p-S129 α-syn. Scale bar = 50 μm. C Quantification of the percentage of p-S129-positive neurons in the ipsilateral SN.