The 3D4/21 (ATCC, CRL-2843), PK-15 (ATCC, CCL-33), and HeLa (ATCC, CCL-2) cells were cultured in DMEM (Gibco, Waltham, MA, USA) supplemented with 10% FBS (Gibco), 100 units/mL penicillin, and 100 mg/mL streptomycin sulfate (Sangon, Shanghai, China). All cells were grown in monolayers at 37 °C in 5% CO2. The 3D4/21 P65−/−, PK-15 ATG5−/−, and Beclin-1−/− cells were used and cultivated as previously described [19 (link),20 (link)].
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