For the cell growth test at different time points, the MTS assay was carried out with an MTS test kit (Thermo Fisher Scientific). A Wallac Victor 1420 Multilabel Counter was used to measure the absorbance. Each test was repeated 3 times. For the 5-bromo-2′-deoxyuridine (BrdU) test, cells were cultured for 3 days and then labeled with BrdU (3 μg/mL) (Thermo Fisher Scientific) for 4 h. The BrdU results were analyzed according to a previously described method (DeWaal et al., 2018 (link)).
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