SH-SY5Y cells (European Collection of Cell Cultures; Sigma-Aldrich) were cultivated in RPMI 1640 medium containing 2 g/l glucose and 5% or 10% FCS. HeLa cells (Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH) were cultivated in Minimal Essential Medium with Earle's salts containing 10% FCS and 1% non essential amino acids. Primary cortical neurons were isolated from 1–4 d old mice as described previously [3] (link) and incubated with Neurobasal medium for 10–20 days before performing experiments. All cells were kept at 37°C with 5% CO2 and 95% air.
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