We maintained human neuroblastoma SH-SY5Y cells (ATCC, Manassas, VA) in DMEM containing 10% FBS (v/v) and antibiotics (penicillin-streptomycin 100 U/mL, ThermoFisher Scientific). The cell culture incubator was set with a humidified atmosphere consisting of 5% CO2/95% air at 37 °C. To transiently transfect the indicated plasmids (pCMV-tTA, TetP-β23, pTet-dual2, and HA-α-synuclein [8 (link)]) to SH-SY5Y cells, the X-tremeGENE HP transfection reagents (Roche) were used following the manufacturer’s protocol.
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