Primary neuronal cultures from the striatum of postnatal day 0 (P0) pups were prepared as described previously [24 (link)]. In brief, neurons were dissociated by papain buffer (Sigma), and were then placed in the poly-D-lysine coated slides (BD) or plates in Basal Eagle Medium (Sigma). Arabinosylcytosine (Sigma) was used to inhibit glial cell growth. Tetrodotoxin (TTX, Sigma), Bicuculline (Sigma) and LRRK2 kinase inhibitor MLi-2 (Tocris Bioscience, Bristol, UK) were added directly to the medium of striatal neurons from the stock solutions.
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